Medline Repository

Oxygen --> SO2

743697 The linearity and repeatability of measurements of total haemoglobin concentration ([Hb]) and oxygen saturation (So2) by the OSM2 oximeter have been studied. Human
16494 In 11 fetal sheep experiments, the blood pressure in the fetal aorta (FA) and in the umbilical vein (UV) was measured following umbilical vein occlusion (UVO), as was the fetal heart rate (FHR), pH, Pco2, and oxygen saturation (So2) in both fetal vessels, and umbilical blood flow (Qumb) of the common UV. Sheep
16494 The So2 in the UV remained constant so that arteriovenous difference for oxygen (AV Do2) increased. unknown
32162 In the mixing technique for study of oxygen-hemoglobin equilibrium, the O2 saturation (SO2) of a blood mixture is calculated from the volume ratio at which an oxygenated sample is mixed with a deoxygenated sample, and the PO2 in the mixture is measured polarographically. Human
32162 It is shown that the volume and oxygen saturation of the mixed samples are by far the most critical parameters in calculating SO2, and a method is suggested by which the volume ratio is accurately measured by weighing the blood samples before mixing. unknown
32162 Other parameters that influence determination of SO2, e.g., the O2 capacity of the blood, are much less important. unknown
32162 The technique is particularly applicable to problems that require exact adjustment of SO2 to a predetermined value, such as determination of the half-saturation pressure or of the Bohr effect at various levels of O2 saturation. unknown
38057 Determination of O2 affinity of hemoglobin by independent continuous measurement of SO2, PO2, and pH, with control of pH, PCO2, and temperature. Dogs
41830 Central venous SO2 (SCVO2) and PO2 (PCVO2) were significantly higher and lower, respectively, in low-P50 animals than in controls, probably because of limited oxygen extraction due to increased blood oxygen affinity. Rats
30069 The Bohr factor, phi = delta log Po2/deltapH, was determined at various levels of hemoglobin O2 saturation (SO2) in fresh whole blood of the duck. unknown
7356899 1 The definition of PO2 and its relationship to the oxygen saturation (SO2) by the oxygen dissociation curve (ODC) is described with details of the ligands of the ODC and the effects of haemoglobinopathies on P50 (the position of the ODC) and the slope of the ODC (Hill's 'n'). Human
7435644 This study compared oxyhemoglobin saturation (SO2) and O2 content (CO2) estimated from O2 tension (PO2) by the Rossing-Cain nomogram (J. Appl. Physiol. 21: 195-201, 1966) with SO2 and CO2 estimated by a galvanometric O2 analyzer in blood samples from eight dogs. Dogs
7435644 CO2, calculated as the product of SO2, hemoglobin concentration (cyanmethemoglobin method), and hemoglobin O2 capacity, was significantly overestimated by the nomogram by as much as 1.2 ml/dl between 2 and 9.9 ml/dl. unknown
7435644 We conclude that because coronary venous SO2 and CO2 values normally lie in the range of greatest error, estimates of these values based on PO2 are particularly unsuited for studies of myocardial O2 usage. unknown
6784207 Oxygen saturation (SO2) from PO2, PCO2, pH, and body temperature (T). Unknown
6784207 Oxygen concentration (CO2) from SO2, PO2, and hemoglobin concentration (Hb). unknown
6776481 The derived equations correlate Po2 variations with those of temperature (T: 25--42 degrees C) and oxygen saturation (So2:10--90%). unknown
6776481 DPG lowered dlog Po2/dT from 0.0299 to 0.0275 and delta H from --12.9 to --11.8 kcal/mole O2 bound at 50% So2 but had no significant influence on these parameters for So2 less than or equal to 20%. unknown
6469813 phe effect of temperature changes on human whole-blood O2 affinity was measured in the blood of six healthy donors over almost the entire O2 saturation (SO2) range (1-99%). Human
6469813 The results showed that temperature has no influence on the shape of the O2 dissociation curve, implying that the temperature coefficient (delta log PO2/delta T) is independent of SO2. unknown
6432749 The H+ factor (delta log PO2/delta pH) was determined over the entire oxygen saturation (SO2) range at three different FHbCO levels (14, 30, and 52%). unknown
6407372 Each of these patients could sustain adequate spontaneous ventilation, as reflected by stable end-tidal carbon dioxide concentration (FETCO2), and arterial oxygen saturation (SO2) during periods of unassisted ventilation of sufficient duration to allow study. Human
6813948 PO2 for oxygen saturation (SO2) = 0.5, in a new system which allows the measurement of SO2, PO2 and pH continuously and independently, with control of PCO2 and temperature. unknown
6636180 Lactate dehydrogenase (LD) levels and isoenzyme patterns were determined in the cell-free supernatant fractions of lung lavage fluid from hamsters exposed to alpha-quartz, iron oxide, Triton X-100, 100% O2, or 200 ppm SO2. Hamsters
6419623 Epithelial sheets in either phosphate-free Cl--Ringer or phosphate-free SO2-4-Ringer were bubbled at room temperature with 100% N2, 100% O2, 2% CO2-98% O2, 5% CO2-95% O2, and 15% CO2-85% O2. unknown
6419623 The results show that the intracellular pH (pHi) with Cl- -Ringer was 7.19 and with SO2-4-Ringer was 7.42 with extracellular pH of 7.52 when bubbled with 100% O2. unknown
3577308 By this catheter placed in the right ventricular cavity, sinus rate (SR), mixed venous oxygen saturation (SO2), temperature (T) and stroke volume (SV) were continuously recorded in 7 volunteers. Human
3647356 The ratio of the product of CaO2 and Q (systemic oxygen availability) to VO2 (SO2 T/VO2) remained unchanged during all modes of ventilation (1.75 +/- 0.15). unknown
3448596 The presence of CH4, CO2, N2, H2, O2, CO, CnHm, H2S and SO2 was found in the rumen gas samples analysed. Sheep
3482481 Supplementing the determination of total hemoglobin (CHb*) and oxygen saturation (SO2) with measuring the fractions (F) of inactive hemoglobins (dyshemoglobins: carboxyhemoglobin, HbCO; methemoglobin, Hi; sulfhemoglobin, SHb) in human blood is becoming common practice in many hospitals. Unknown
3344823 In 23 hamsters, measurements of red blood cell velocity, hematocrit, vessel diameter, segment length (L), hemoglobin oxygen saturation (SO2), and longitudinal SO2 gradient (delta SO2/L) were made in four branching orders of arterioles before and after isovolemic exchange with plasma. Hamsters
3364247 Both sensors in the arterial and venous circuits functioned satisfactorily for a duration of 40 days; no blood clots were observed around the sensor and the mixed venous SO2 varied sensitively in response to changes in the respiratory status, pump output, [Hb], and oxygen consumption, thus showing that it could be used as an indicator to evaluate the adequacy of oxygen delivery to peripheral tissues. Unknown
3364294 In the present experiments the oxygen levels (pO2, SO2 and O2 content) in the fetal carotid (CA) and femoral (FA) arteries were measured to determine whether preferential streaming of the oxygenated blood is maintained from the bypass to the foramen ovale and thence through the left heart to the upper body, as in other species. Swine
3364294 Significant CA-FA differences in pO2, SO2 and O2 content were observed in these fetuses during both normoxaemia and hypoxaemia showing that a higher level of oxygen can be maintained to the fetal head and brain over a wide range of oxygenation. unknown
2740819 Cutaneous oxygen saturation (sO2) was recorded on an ear oxymeter (Biox IIA). Human
2745294 In four sheep with severe loads, we measured O2 saturation (SO2), O2 content, and hemoglobin. Sheep
2745294 With both loads, venous PO2, SO2, and O2 content decreased initially and then increased, so that the arteriovenous difference in O2 content decreased as loading continued. unknown
2745294 We conclude that the changes in venous PO2, SO2, and O2 content may be the result of changes in hemoglobin, blood flow to the diaphragm, or limitation of O2 diffusion. unknown
2808896 Photometrically measured values of O2-saturation (SO2) were compared with SO2 predictions on the basis of the equations proposed by Heck, Kelman, Lutz, Marsoner, Severinghaus, and Siggaard-Andersen on 1350 occasions. Human
2597056 The index of haemoglobin concentration (Hb index) and apparent oxygen saturation (apparent SO2) were determined by a new, non-invasive method, tissue reflectance spectrophotometry. Dogs
2597056 The relationship between the apparent SO2 and oxygen partial pressure was a sigmoid curve resembling the haemoglobin oxygen dissociation curve. unknown
2600041 The bias and precision of four different methods for determining O2 saturation (SO2) were evaluated during a study of hypobaric hypoxia conducted with seven male subjects exposed progressively over a 40-day period to simulated altitudes from sea level (760 Torr) to 8,840 m (240 Torr). Human
2600041 SO2 of arterial and mixed venous blood samples were measured with the Instrumentation Laboratory 282 CO-oximeter (CO-OX), the Radiometer ABL-300 (ABL), and the Lex-O2-Con-K (LEX). unknown
2635875 Haemoglobin oxygen saturation (SO2) was measured percutaneously with a pulse oximeter, in a group of 150 healthy ambulant volunteers to determine the range of normal values. Human
2635875 Only 1.1% of patients who received additional oxygen following general anaesthesia exhibited an SO2 below 90%, compared to 16.7% of similar cases who did not receive additional oxygen. unknown
2635875 Administration of additional oxygen raised the SO2 above 90% in all the latter cases. unknown
2635875 In only 55.3% of those who did not receive additional oxygen was the SO2 above 94%, compared to 86.7% of normal volunteers and 73.9% of patients who received additional oxygen. unknown
2635875 This study reiterates the need to administer supplemental oxygen to all patients in the recovery room, unless facilities are available to measure SO2. unknown
2521987 Even with a critical look at the mishaps of this method - overestimation of true O2 saturation (sO2) and partial O2 saturation (psO2) and overestimation of hemoglobin derivatives--pulse oximetry seems superior to the established monitoring techniques in the perioperative period. Human
2551133 Increase in FIO2 up to 3 ATA O2 caused stepwise increase in So2, whereas cyt. aa3 was fully oxidized when the animal inspired O2 under 1 ATA. unknown
2453078 Using arterial sO2 and pO2 as reference, the analytical bias of pulse oximetry (-0.5 +/- 1.0%, mean +/- 1 SD) corresponded in magnitude, when converted to pO2, to that of transcutaneous - pO2 (0.6 +/- 1.4 kPa for combined O2-CO2 electrode and -0.1 +/- 2.3 kPa for single O2 electrode). unknown
2448064 A new instrument for spectrophotometric determination of oxygen saturation (SO2) and the fractions of carboxyhemoglobin (FHbCO) and methemoglobin (FHi), the Hemoximeter OSM3 (Radiometer), was tested by comparative measurements with a multiwavelength method. Human
2432580 In 20 volunteers (mean age 35.5 y) and 12 pacemaker patients (mean age 68.7 y), central venous oxygen saturation (SO2) was monitored continuously by means of an optical sensor integrated in an external transvenous pacing lead placed in the right ventricular cavity. Human
2456551 A new multisensor pacing device using respiratory rate (RR), stroke volume (SV), oxygen saturation (SO2), temperature (T), right atrial pressure (RAP), right ventricular pressure (RVP) and right ventricular dP/dt, has been developed. Human
2470112 Comparison of pre- and post-challenge blood gas profiles, showed a progressive formation of respiratory acidosis through decreases in arterial blood pH, partial pressure of O2 (pO2), O2 saturation (sO2) and an increase in partial pressure of CO2 (pCO2). Macaca fascicularis
3083612 The normalization of FHR after reduction of QUT was compared with the change of fetal blood pressure (BP) and fetal oxygen saturation (SO2). Sheep
3088308 After solving the diffusion equations the Po2, O2 saturation (So2), Pco2, pH, and HCO3-content were corrected by using the Henderson-Hasselbalch equation, where the buffer value was newly derived from the CO2 dissociation curve. unknown
3098394 The decrease in CS SO2 demonstrates a reserve capacity of myocardial oxygen extraction during hypocapnia, thereby ruling out any major coronary vasoconstriction during hypocapnia. unknown
3098394 Hypercapnia during normoxemia increased MBF, myocardial oxygen delivery, and CS SO2 substantially, but this was not observed when hypercapnia was created during arterial hypoxemia. unknown
3110734 The PO2 at halfsaturation (P50) and the Hill's n were determined from O2-Hb dissociation curves (ODC) in a range between 20 and 80% SO2. unknown
3114215 In intact dogs, bradykinin (2 micrograms X kg-1 X min-1 iv) caused systemic vasodilation, i.e., systemic arterial pressure was slightly decreased (P less than 0.05), Q was markedly increased (P less than 0.01), and mixed venous PO2 and oxygen saturation (SO2) were increased (P less than 0.01). unknown
3113240 The index of mucosal blood volume and mucosal blood hemoglobin oxygen saturation (Hb-SO2) were measured at 20 locations in the stomach using reflectance spectrophotometry during endoscopy prior to and after administration of the study drug. Human
3134330 Arterial blood for pH, PO2, PCO2, O2 saturation (SO2) HCO3, and lactate was sampled from a radial arterial catheter at the end of each work and rest interval and throughout recovery, and the results were analyzed using repeated-measures analysis of variance. Human
3142096 Blood gas values of the umbilical vein and artery in the sitting group were significantly higher in pH, PO2, base excess (BE) and oxygen saturation (SO2), and lower in PCO2 than those in the supine group. Human
3136136 A calculation was derived that fitted the data well [difference 0.02 +/- 1.19 ml/100 (SD) ml, r = 0.98] blood CCO2 = plasma CCO2 (Formula: see text) where plasma CCO2 = 2.226.s.plasma PCO2.(1 + 10pH-pK'), CCO2 is CO2 content, SO2 is O2 saturation, s is the plasma CO2 solubility coefficient, and pK' is the apparent pK [s and pK' are from the equations of Kelman (Respir. Physiol. 3: 111-115, 1967)]. unknown
2932322 Using the organ-reflectance spectrophotometer, the regional hepatic blood hemoglobin concentration (delta Er569-650), an indicator of the regional hepatic blood flow, and the oxygen saturation of hemoglobin in the regional hepatic tissue (So2) were measured in patients with chronic liver disease after ranitidine injection under peritoneoscopy. Human
3082500 Although oxygen saturation (So2) and Po2 in the coronary sinus blood decreased, these values remained well above those with hypocapnia without epinephrine infusion, thereby excluding impaired oxygen supply to the heart. unknown
3811446 PO2 remained constant while SO2 showed a decrease in the order of 10%, due to the change in oxygen affinity of the fetal blood produced by the Bohr effect. Sheep
3120431 In this context the question arises whether a critical threshold of oxygen saturation (SO2) in fetal arterial blood can be defined, below which a severe fetal acidosis and a fetal shock syndrome may develope. Sheep
3943793 That is, an increase in oxygen extraction, which was exhibited by a decrease in the estimated SO2, did not occur in rats treated chronically with ethanol in spite of a decrease in blood supply. unknown
3364254 Fitting the experimental results by the Hill equation, the coefficients describing allosteric interaction induced by CO2 hydration and by DPG in the presence of both O2 and CO were calculated for the total saturation, ST defined as the sum of SO2 and SCO, ranging from 20 to 90%.(ABSTRACT TRUNCATED AT 250 WORDS) unknown
2712394 It has been shown that diagnostic value of such indexes as SO2 and pO2 in mixed venous blood, O2 consumption and transport, blood and erythrocyte acid-base balance, lactate concentration depends on the cardiac pump function, microcirculatory patterns, pulmonary oxygenation and cell metabolism. Human
2759649 Oxygen saturation (SO2) should not be confused with oxyhemoglobin fraction (FHbO2). Human
2333335 In the initial presence of oxygen, II (X = SO2.) was highly reactive toward O2, giving a fast oxidation to II (X = SO3-) and effectively suppressing the formation of the flavosemiquinone.(ABSTRACT TRUNCATED AT 250 WORDS) unknown
2281996 In order to evaluate the pump output control based on the oxygen delivery to peripheral tissues, arterial and mixed venous hemoglobin content ([Hb]) and oxygen saturation (SO2) were continuously monitored in three biventricular bypass animals (3-, 6-, and 40-day experiments) with fibrillating ventricles. Goats
2281996 The specially developed oxygen sensors were mounted in the outflow ports of the artificial hearts to measure [Hb] and SO2. unknown
2288434 The method for the calculation of Hb O2 saturation (SO2) by CO2 to OC ratio was compared to direct SO2 measurement on OSM-2 radiometer. unknown
2089613 The oxygen status of arterial human blood is described at least by four variables: Oxygen partial pressure (pO2, mmHg), oxygen saturation (sO2, %), hemoglobin content (cHb, g/dL) and oxygen content (cO2, mL/dL). Human
2089613 The diagnostic significance of the O2 variables of the oxygen status consequently increases in the order of pO2, sO2 (cHb) and cO2. unknown
2089624 A multicenter study including 10079 arterial blood gas measurements were used to describe the clinical variation in the hemoglobin-oxygen dissociation curve i.e. the relationship between measured values of oxygen tension (pO2) versus oxygen saturation (sO2) and the concentration of total oxygen (ctO2). Human
2089624 The results indicate that it is essential to know the actual position of the hemoglobin-oxygen dissociation curve, as well as the hemoglobin concentration in the individual patient, for correct interpretation of pO2 or sO2 in arterial blood. unknown
2039187 Under oxygen therapy (3 l/min), PO2 was 49 mmHg and SO2 was 82%. Human
2053784 Transcutaneous oxygen pressure (TcPO2) and oxygen saturation (SO2) fell significantly during the first five minutes after nebulisation with further deterioration at 15-20 minutes. Human
1565896 (Ca - Cv)O2 after NaHCO3 was larger in hypoxia because a change in pH results in a larger change in HbO2 saturation at the values prevalent in arterial blood of the hypoxic rats (i.e. PO2 approximately 40-50 Torr, SO2 50-60%), than at either the values of normoxic arterial blood or of venous blood during maximum exercise. Rats
1437348 Adaptive adjustment of inspired oxygen (FIO2), based on a desired percent arterial hemoglobin saturation (SO2) was achieved by on-line bedside control of the oxygen concentration delivered to the neonate. Human
1437348 The desired range of SO2 from 92 to 96% with a target value of 95% was determined by pulse oximetry and maintained with adjustment of FIO2 using three modes: 1) standard neonatal intensive care protocol with oxygen delivery evaluated at 20 minutes intervals; 2) bedside manual control with FIO2 manipulation every 2 to 5 minutes; and 3) adaptive control with on-line adjustment of FIO2 according to a specifically designed adaptive program. unknown
1437348 In addition, fluctuations in SO2 values and overshoots were less apparent with adaptive control of oxygen delivery. unknown
8419620 To evaluate the reliability of the Nellcor N200 pulse oximeter in the detection of hyperoxemia (oxygen tension > 80 mm Hg), we obtained 213 simultaneous recordings and measurements of transcutaneous oxygen saturation (SO2) and arterial oxygen tension (PaO2) in 50 patients. Human
8385334 We evaluated the effect of exposure to SO2 on the oxidative metabolism of AM and peripheral blood mononuclear cells (PBMNC) by measuring the spontaneous and stimulated reactive oxygen-intermediates (ROI) release. Human
8392176 We evaluated the reactive oxygen intermediates (ROI) production of AM and peripheral blood mononuclear cells after exposure with SO2 and Chrysotile B. unknown
8194801 Presence of normoxia (pO2 and sO2 in norm) in COLD patients does not exclude abnormalities in their arterial blood oxygen transport and increased risk of tissue hypoxia. Human
1257350 It resulted that the most active chemical species, in this class of compounds, are characterized, electronically, by the most electron-rich common moiety and, in particular, by the most negative oxygens in the SO2 group and the most available (less engaged) lone-pair in the rho-amino group. unknown
881400 Prediction of PO2 from SO2 using the standard oxygen hemoglobin equilibrium curve. Unknown
881400 We have fitted polynomial equations to three major segments of the standard oxygen hemoglobin equilibrium curve (OHEC) using oxygen saturation (SO2) rather than oxygen tension (PO2) as the independent variable. unknown
882729 Theoretical analysis of the factors affecting k'c suggested that its rise with increasing SO2 was due to a lowering of the concentration of intracellular deoxyhemoglobin rather than to any increase in reaction rate of oxygen with the hemoglobin molecule. Human
705080 For both sexes (7 males, 7 females) the fixed acid Bohr coefficient BCFA (delta PO2/deltapH) and the temperature coefficient TC (deltalogPO2/deltaT) were investigated in whole blood as function of oxygen saturation (SO2). Human
484928 The P100 response to hypercapnia delta P100/delta PCO2) and hypoxia (delta P100/delta SO2) as well as absolute P100 at any given degree of O2 and CO2 drive was greater during control rebreathing in asthmatics than in normal subjects (P less than 0.05). unknown
290489 Twenty newborn infants (gestational age 30--40 weeks, weight 980--3400 g) were studied in two groups to compare two commercially available systems for continuous in vivo oxygen monitoring: the So2 catheter and the transcutaneous Po2 (TcPo2) electrode, and their respective electronic systems. Human
290489 Measurements from the two in vivo monitoring techniques studied showed good correlations with their respective in vitro oxygen measurements: So2 catheter, y = x - 3.08, r = 0.98 (range studied 74% to 100%) and transcutaneous electrode, y = 0.98x + 0.57, r = 0.89 (range studied 34 to 92 mm Hg). unknown
234212 The machine will compute alveolar-arterial oxygen tension gradient, oxygen saturation (So2), oxygen content (Co2), actual HCO minus 3 and a modified base excess. unknown
499197 The slope "n" in the Hill plot amounted to 2.65 +/- 0.12 in UT, 2.74 +/- in ST and 2.90 +/- 0.11 in the TR (2 p against UT less than 0.001), leading to an elevated oxygen pressure of about 2 Torr (0.27 kPa) at 20% saturation and an augmented oxygen extraction of 5--7 SO2 at a PO2 of about 15 Torr (2kPa), which might be favorable at high workloads. unknown
7400920 On 11 near term pregnant sheep the response of the fetal transcutaneous oxygen partial pressure (tcPO2) was compared with the alteration of the oxygen saturation (SO2) and the PO2 in the fetal aorta (FA), fetal heart rate (FHR) and fetal arterial blood pressure (FA BP) following the reduction of uterine blood flow (UBF). Sheep
7219240 Besides its numerous toxic effects, e.g. respiratory impairment, interference with immunological response and oxygen transport and platelet aggregation inhibition, SO2 has the ability to alter DNA during replication causing T . unknown
7067478 To determine if tolerance to severe anemia (Hct less than or equal to 10%) might be improved with stroma-free hemoglobin solution (SFH), 15 swine were placed on normothermic right heart bypass (RHBP) for evaluation of stroke volume (SV), coronary blood flow (CBF), arterial-coronary sinus oxygen content difference S(a-cs)O2, and myocardial oxygen consumption (MVO2) during a control period at a hematocrit (Hct) level of 30%. Dogs
7093222 Several 1-substituted adamantane derivatives were investigated; the order of decreasing inhibitory activity with the various substituents was -PO32- much greater than -P(OCH3)O2- greater than -CO2- greater than -CH2CO2- greater than -SO2- greater than SO3-. unknown
7109338 The oxygenation rate factor of hemoglobin (FS) was assumed to decrease as the O2 saturation (SO2) increases, as given by FS = 2.1 x (1--S)2 (sec-1 . (mmHg)-1). Unknown
7109338 Therefore, the difference of the actual PO2 in the red cell from the fictitious, so-called "back-pressure" which is evaluated from the O2 dissociation curve through the actual SO2 has been expected to become greater as the SO2 increases. unknown
6932014 The values, based upon 1 atm standard state, are delta HO2 = -14.0 kcal (1 kcal = 4.18 kJ)/mol, delta SO2 = -35 eu, delta HCO = -17.5 kcal/mol, delta SCO = -34 eu, delta H identical to O2 = 21 kcal/mol (dissociation), and delta H identical to CO = 25 kcal/mol (dissociation). unknown
6804125 Oxygen dissociation curves for whole blood, recorded with an instrument that continuously measures pO2 and sO2 independently at constant t, pCO2, and pH. Human
6804125 During the recording of an oxygen dissociation curve, the pO2 and SO2 signals are stored in a data-acquisition system, while pH, pCO2, and temperature are kept constant. unknown
6804125 Determination of precision and error discussion indicated that the coefficient of variation (CV) of the determination of the oxygen dissociation curve is mainly determined by the error in the measurement of SO2. unknown
6816853 In the umbilical venous blood, mean values for pH, PCO2, PO2, Hb and SO2, respectively, were 7.324, 45.1 mmHg, 29.5 mmHg, 8.8 mmol 1(-1), and 0.57 mol O2 per mol of haemoglobin monomer. unknown
6705123 This study compared oxygen tension (pO2) and percent oxygen saturation (SO2) in antecubital venous blood of six untrained (UT) and six endurance trained (ET) males during and following a graded leg exercise test to exhaustion on a cycle ergometer. Human
6189770 Fetal heart rate (FHR), systolic and diastolic blood pressure (BP) and fetal arterial oxygen saturation (SO2) were measured continuously. Sheep
6189770 Lactate production during hypoxia was related to the slope of the SO2 decline, i.e., to the fetal O2 consumption. unknown
6184684 A rate-adjusting pacemaker system is described which uses central venous oxygen saturation (SO2) for the regulation of the pacing rate. Human
6209667 Right ventricular oxygen saturation (SO2) may be an ideal sensor for determining the rate of an implanted pacemaker. Human
3988677 From the time course of O2 saturation (SO2) change a specific transfer conductance of erythrocytes for O2 (GO2) was calculated. Human
3988677 The following results were obtained: 1) GO2 decreased in the course of O2 uptake, but initial GO2 was nearly independent of SO2 at which uptake started; 2) addition of albumin to the medium reduced GO2; 3) increasing dithionite concentration in the medium in O2-release experiments progressively enhanced GO2, which became virtually constant for nearly the entire course of release; and 4) O2 uptake and O2 release (without dithoite) in the same SO2 range yielded very similar GO2. unknown
3988677 These results suggested that O2 uptake and release were importantly limited by diffusion through the external medium and that in the SO2 range between 0.3 and 0.8, chemical reaction exerted little limiting effect. unknown
3706854 New techniques for determining the hematocrit (Hct) and oxygen saturation (SO2) of whole blood from backscattered light measurements are described. Human
3367912 Pulse oximetry is a relatively new noninvasive method to measure arterial oxygen saturation (SO2). Human
3393095 Simultaneously determined values of red blood cell velocity, lineal density, red blood cell frequency, hemoglobin oxygen saturation (SO2), oxygen flow (QO2), longitudinal SO2 gradient, and diameter were obtained in a total of 73 capillaries, 39 at the arteriolar ends of the network (arteriolar capillaries) and 34 at the venular ends (venular capillaries). Hamsters
3393095 To evaluate the impact of these heterogeneities on oxygen exchange, we incorporated these unique experimental data into a mathematical model of oxygen transport which accounts for variability in red blood cell frequency, lineal density, inlet SO2, capillary diameter, and, to some degree, capillary flow path lengths. unknown
3393095 An unexpected result of the simulation is that only the incorporation of variability in capillary flow path lengths had any marked effect on the heterogeneity in end-capillary SO2 in resting muscle due to extensive diffusional shunting of oxygen among adjacent capillaries. unknown
3394687 The oxygen saturation of hemoglobin in local liver blood (SO2) was, however, significantly higher in alcoholic fatty liver than in nonalcoholic fatty liver. Human
3394687 These results suggest that an increase in oxygen extraction to maintain oxygen consumption, which was indicated by the lowering of the SO2, was not found in alcoholic fatty liver, in spite of a reduction of oxygen supply to the liver. unknown
2912188 We determined percent hemoglobin oxygen saturation (SO2) in arterioles and venules of the hamster retractor muscle at rest. Hamsters
2912188 Thus approximately two-thirds of the net decline in SO2 for this tissue occurred by diffusion of oxygen from arterioles, whereas only about one-third occurred by diffusion from capillaries. unknown
2912188 Furthermore, no net shunting of oxygen from the arterioles to the venules was detected as evidenced by the absence of any significant change in venular SO2. unknown
2929971 Even with a critical look at the already described mishaps of this method--e.g. overestimation of true O2 saturation (sO2) and additional overestimation caused by Hb-derivatives--pulse oximetry was found to be superior to the established monitoring techniques. Human
2714024 Due to an elevated red cell 2,3-diphosphoglycerate concentration (2,3-DPG) and mild metabolic acidosis, elevated standard and in vivo P50 values (pO2 at 50% oxygen saturation of hemoglobin, sO2) were measured. Human
3418526 Addition of SO2 (300-400 to the inspirate, which others have shown preferentially blocks pulmonary stretch receptors, abolished the Breuer-Hering reflex, but had no significant effect on baseline levels of muscle vascular conductance or heart rate during normoxia, nor on the gradual increases in these variables during hypoxia (8% O2). unknown
2500338 During the incremental exercise the partial pressure of oxygen (PO2) and carbon dioxide (PCO2), oxygen saturation (SO2), pH and lactate concentration [HLa] of five subjects, were measured repeatedly in blood from the brachial artery and deep veins from muscles in the forearm of both the active and inactive sides. unknown
2311735 We measured pulmonary function, responses to exercise and oxygen saturation (So2) at rest, and also before and during sleep in 24 patients with cystic fibrosis in a varying degree of severity. Human
2311735 The exercise variables included symptom limited maximal oxygen uptake (Vo2max), maximum minute ventilation (VEmax) and So2, at rest in sitting position and during maximal exercise. unknown
2311735 The lowest mean So2 obtained in two consecutive nights over a period of 1 hour was taken as the indicator of nocturnal oxygen saturation. unknown
2318560 Pulse oximetry allows non-invasive monitoring of arterial oxygen saturation (SO2). Human
2364712 We compared the performance of the Biox 3700 and Nellcor N100E models against arterial saturation (SaO2) measured on a Radiometer OSM2 hemoximeter and against transcutaneous SO2 (StcO2) derived from transcutaneous oxygen tensions (PtcO2) (632, Roche Kontron). Human
2260696 In 17 hamsters, measurements of red blood cell velocity, hematocrit, vessel diameter, segment length (L), hemoglobin oxygen saturation (SO2), and longitudinal SO2 gradient (delta SO2/L) were made in four branching orders of arterioles before and after isovolemic exchange with packed red blood cells. Hamsters
2128557 The traditional parameters obtained from an arterial sample are the oxygen tension (pO2) and the hemoglobin oxygen saturation (sO2). Human
2139123 The hemoglobin concentration (Hb index) and oxygen saturation (apparent SO2) in human gingiva were estimated by tissue reflectance spectrophotometry (TRS). Human
2012229 Arterial oxygen saturation (So2) and partial pressure of oxygen (Po2) measured at the point of arousal, or after 60 s if arousal failed to occur, were unchanged from control values. Sheep
1854029 Oxygen consumption, oxygen transport, the ratio of the two, mixed venous PO2, and mixed venous oxyhemoglobin saturation (SO2) increased late in the anesthetic in comparison with the first 90 min. Human
1855796 As an extension of the photoplethysmographic technique, red-infrared pulse oximetry applied to the measurement of the oxygen saturation (SO2) of blood in the pulp was also examined using an in vitro test setup. Human
1889361 On the arterial and venous blood on determination the pH, BE, sO2, pO2, HCO3 and coefficient of consumption of the oxygen, and on the venous blood the levels of Na, K, Mg, Ca, P, total proteins, albumins and globulins, cholesterol, glucose, bilirubin, alkaline phosphatase and urea. unknown
1961623 In the patients who did not receive pure oxygen, at the end of surgery the mean RR was 15.8 +/- 4.4/min (maximum, 21; minimum, 6.4/min); the mean SO2 was 86.9% +/- 6.6% (maximum, 98%; minimum, 74%; in 11/25 patients, the SO2 was lower than 90%); and the mean pCO2 was 34.9 +/- 7.7 mm Hg (maximum, 46.5; minimum, 12.15; in 4/25 patients, the pCO2 was greater than 45 mm Hg). unknown
1961623 In the patients who received pure oxygen by a nasal probe, the mean SO2 increased intraoperatively from 80.6% +/- 5.8% to 96.9 +/- 2.9% (in no patients was SO2 lower than 90%). unknown
1539710 Using in vivo video microscopy and computer-aided image analysis, we determined oxygen saturation (SO2) and associated hemodynamic parameters in both arteriolar (n = 30 control, 18 treated) and venular (n = 25 control, 17 treated) capillaries. unknown
1590574 The following parameters were controlled and documented: systolic and diastolic blood pressure (SAP and DAP), heart rate (HF), end-expiratory carbon dioxide (eeCO2), inspiratory oxygen concentration (FiO2) and peripheral oxygen saturation (sO2). unknown
1621957 The resulting affinity matrices have the general formula M-O-CH2-CH2-SO2-CH2-CH2-X-Y, where M is the agarose matrix, X is oxygen or nitrogen, and Y is an aromatic or heteroaromatic compound. Human
1480844 Similar values were obtained at high PCO2 (19 kPa; blood pH, 6.9), indicating O2 kinetics to be independent of pH and PCO2; (2) decreasing the high PO2 from 37 to 14 kPa significantly prolonged oxygen uptake kinetics, but release kinetics were unaltered; (3) changing PCO2 from 0.19 to 19 kPa at constant high PO2 (37 kPa) resulted in a reduction of hemoglobin oxygen saturation (SO2) (Root-off reaction), with t(off) averaging 44.8 msec; likewise, changing PCO2 from 19 to 0.19 kPa increased SO2 with t(on) averaging 64.8 msec (Root-on reaction). Unknown
2128553 However, in critically ill patients in evolution our aim is to maintain an 'optimal' paO2 on the plateau of the Oxygen Dissociation Curve (ODC) and the use of mechanical ventilation, high FIO2, fluid challenges and the rapid improvement of the patient's conditions can cause a value for sO2 greater than or less than 0.97 and an improvement or worsening of the paO2. Human
2128554 So, in these patients the new iterative equations were not valid to determine traditional oxygen parameters from only Po2 and So2 arterial measurements. unknown
2089607 The influences of analytical variation of sO2 and pO2 measurements on the oxygen parameters p50, pO2uv-, DavO2c, CQ are examined by simulation. Human
2089607 The calculation of the new oxygen parameters should be restricted to blood samples with sO2 not higher than 0.96. unknown
8439273 The specially developed reflection-type optical sensors were mounted on each artificial heart to measure continuously arterial and mixed venous SO2 and hemoglobin content ([Hb]), which in combination with pump output data oxygen consumption of the animal was derived on-line for a maximum duration of 40 days. Goats
8458779 We systematically investigated the quantitative importance of pH and O2 saturation (SO2) of hemoglobin on the solubility coefficients (alpha) for six inert gases: sulfur hexafluoride, N2, ethane, cyclopropane, halothane, and diethyl ether. Human
8470079 Arterial and transcutaneous measurements of the oxygen saturation (SO2), the partial pressure of oxygen (PO2) and the partial pressure of carbon dioxide (PCO2 were compared during rest before and after cycling, and during submaximal and maximal exercise, in 12 adult patients with cystic fibrosis. SO2 was measured non-invasively using two different pulse oximeters (Radiometer and Ohmeda, respectively) and PO2 and PCO2 were registered with a transcutaneous electrode (Radiometer). Human
8470079 The coefficients of correlation between arterial and transcutaneous values were respectively 0.95 (Radiometer) and 0.85 (Ohmeda) for SO2, 0.77 for PO2, and 0.75 for PCO2. unknown
8470079 On average the differences between arterial and transcutaneous values were small, but varied by 3-4% (2SD) for SO2, 2.0 kPa for PO2 and 1.0 kPa for PCO2. unknown
8505235 Equilibrium constant calculations showed that SO2 would be expected to be the predominant species produced by reactions of sulfur molecules (Sn:n = 2-8) with oxygen in air and that the quantity of SO2 produced would be reduced by heating the irradiated sulfur target under vacuum or in atmospheres of inert gases. unknown
7906635 The oxygen saturation (SO2) was determined of Sprague-Dawley rat blood having increased hemoglobin (Hb)-O2 affinity (P50 < 37 mmHg) or capacity (Cmax) over a range of pH's. unknown
7906635 Oxygen dissociation curves (ODC's), derived from simultaneous SO2 and PO2 measurements during deoxygenation (PO2: 100-0 mmHg) of blood (normal and acidified with CO2 or lactic acid), delivered Bohr coefficients (BCCO2, BCLac) each differing between groups (C vs N) above SO2 50%; within groups BCCO2 vs BCLac differed at SO2 10-90% (P < 0.05). unknown
7906635 Group-specific ODC's and pH-shifted curves (+/- 0.05, +/- 0.10 and +/- 0.15 units from 7.4, relying on BCCO2) are plotted for direct reading of SO2 and, with Cmax, accurate data on blood O2 content are obtained; corrections for lactic acidosis are discussed. unknown
8400799 Oximetry nowadays is understood as the in vitro measurement of O2 saturation (sO2, %) and hemoglobin (Hb) derivatives (%) using 4-7 wavelengths (CO- and Hem-oximeters). Human
8400799 Provided there is a constant Hb concentration, knowledge of the initial sO2, and absence of the derivatives COHb and MetHb as well as of severe perfusion disorders, pulse oximetry is suitable for perioperative respiratory monitoring of oxygen transport. unknown
8263061 The difference in the oxygen saturation (SO2) of hemoglobin between the regional arteriole and venule [R(A - V)] and that between the regional arteriole or capillaries [R(A - C)] were calculated. Rats
8263061 Altogether, the SO2 in the capillary region decreased and the reduction of cytochrome aa3 progressed with the decline of arteriolar O2 supply in both hypoxic and anemic hypoxia. unknown
8157019 Heart rate, transcutaneous carbon dioxide tension (tcpCO2) and arterial haemoglobin oxygen saturation (SO2) were recorded simultaneously. Human
8015155 These results suggest that DA and PGE1 elevate the portal venous PO2 and SO2 by increasing splanchnic blood flow more than its oxygen uptake or without increasing splanchnic oxygen uptake, and increase the oxygen supply to the liver. unknown
8079797 Photometric determination of the O2 status of human blood using the Oxystat system: cO2 (mL/dL), sO2 (%), cHb (g/dL). Human
8081190 Although SO2 was increased in the reaction, tcpO2 decreased. Human
Mycobacterium bovis
7952834 MESAM IV is a portable device that records changes in oxygen saturation (SO2), heart rate (HR) and snoring (S). Human
7815826 We evaluated the dose-dependent effect of SO2 exposure on the oxidative metabolism of AM and peripheral blood mononuclear cells (PBMNC) by measuring the spontaneous and stimulated reactive oxygen intermediates (ROI) release. unknown
7818047 Measurements of haemoglobin concentration (Hb), fractional oxygen saturation (SO2), and O2 partial pressure (PO2) were performed by use of a calibrated haemoximeter and blood gas analyser, respectively; 2 x 5 thermodilution measurements of cardiac output (CO) were spread randomly over the respiratory cycle for each determination of VO2Fick. Human
7831213 Apnoea indices and minimal oxygen saturations (SO2) were 59/h and 55/h, and 60% and 58% initially and improved postoperatively to 40/h and 50/h, and 72% and 70%. Human
7851460 This method enabled us to make real-time measurements of oxygen saturation (SO2) and amount (THB) of hemoglobin in the liver sinusoid as parameters of extracellular oxygenation state and of redox transition of cytochrome aa3 as intracellular oxidation state. Human
7867993 A significant correlation was found between the oxygen capacity parameters, beta 1,0 and beta 2,3, and pO2(a), sO2 and the calculated transpulmonary shunt. Human
7869923 The exercise-induced decrease in insulin was more pronounced after beta-blockade. alpha-Blockade caused a less pronounced decrease in venous oxygen saturation (SO2) and tension (PO2) than in the control experiment. unknown
7611584 With unchanging arterial O2 content, avDO2 is inversely related to cerebral venous O2 saturation (SO2). unknown
7611584 Measurement of SO2 in the jugular bulb not only provides information about the O2 balance of the brain, but may give an important estimation of CBF if a clinically useful correlation is proven. unknown
8580254 In addition, XPS results showed that the percentage of sulphur atoms bound to two or three oxygen atoms (sulphone or sulphonate) increased with the SO2-HMDSO mass flow rate ratio. Dogs
8748406 Tissue oxygenation and its heterogeneity were investigated by measuring oxygen saturation of hemoglobin in the liver sinusoid (SO2), coefficient of variation of SO2, and arterial ketone body ratio. Human
9016751 The extensive literature search was conducted for carbon monoxide (CO), carbon dioxide (CO2), hydrogen cyanide (HCN), low oxygen, hydrogen fluoride (HF), hydrogen chloride (HCl), hydrogen bromide (HBr), nitrogen dioxide (NO2), sulfur dioxide (SO2), acrolein (CH2CHCHO), and heat exposures. Human
8946578 Oxygenation of whole blood from trout in vitro, resulted in a non-linear release of Bohr protons over the haemoglobin-oxygen (Hb-O2) equilibrium curve, where the majority of Bohr protons were released between 60 and 100% of Hb oxygen saturation (SO2). Oncorhynchus mykiss
9150784 RESULTS: Oxygen saturation and end-tidal carbon dioxide concentration remained unchanged using ventilation via facemask (SO2 98.5 +/- 0.9%, FECO2 4.5 +/- 0.7 vol%) or pharyngeal tube (SO2 98.6 +/- 0.7%, FECO2 4.8 +/- 0.4 vol%). Human
7867993 A significant correlation was found between the oxygen capacity parameters, beta 1,0 and beta 2,3, and pO2(a), sO2 and the calculated transpulmonary shunt. Human
7760097 Near-infrared (NIR) spectroscopy was used to measure blood oxygen saturation (SO2) in vivo, in normal rat brain and in subcutaneously-implanted rat 9L gliosarcoma. Rats
7760097 The magnitude of the change in SO2 after sacrifice was greater in normal brain than in tumor (p = 0.02), showing that brain tissue uses a greater proportion of the oxygen in ischemic blood than does tumor tissue. unknown
7869923 The exercise-induced decrease in insulin was more pronounced after beta-blockade. alpha-Blockade caused a less pronounced decrease in venous oxygen saturation (SO2) and tension (PO2) than in the control experiment. unknown
7696072 We compared in vitro oxyhaemoglobin saturations using two pulmonary artery catheters (catheter SO2), with oxyhaemoglobin saturations (SO2) measured by the IL282 co-oximeter and derived partial oxyhaemoglobin saturations (partial SO2) at different oxygen tensions (PO2) in six solutions: whole blood, 50:50 mixture of whole blood and Plasmalyte A (haemodiluted blood), 50:50 mixture of whole blood and 8% pyridoxylated haemoglobin-polyoxyethylene (PHP) conjugate (WB-PHP), 75:25 mixture of 8% PHP and Plasmalyte A solution (PHP66), 50:50 mixture of 8% PHP and Plasmalyte A solution (PHP44) and stroma-free haemoglobin solution (SFH). Human
7766292 Oxygen saturation of hemoglobin in the liver (hepatic SO2) changed from 81.2% +/- 1.5% (mean +/- SEM) before donation (in the donor) to 49.7% +/- 4.2% after portal reflow, to 58.4% +/- 5.0% after arterial reflow, and then to 71.4% +/- 3.9% before closure. Human
7611584 With unchanging arterial O2 content, avDO2 is inversely related to cerebral venous O2 saturation (SO2). unknown
7611584 Measurement of SO2 in the jugular bulb not only provides information about the O2 balance of the brain, but may give an important estimation of CBF if a clinically useful correlation is proven. unknown
7582975 The low molecular weight alpha-keto amide inhibitor CVS-1347, benzyl-SO2-Met(O2)-Pro-Arg(CO)((CONH)CH2)-phenyl, is a slow, tight binding inhibitor of alpha-thrombin amidolytic activity having a Ki = 1.28 x 10(-10) M. unknown
7489162 Higher levels of SO2 were obtained with local heating up to 44 degrees C, with a pattern similar to that of PtcO2. Human
8580254 In addition, XPS results showed that the percentage of sulphur atoms bound to two or three oxygen atoms (sulphone or sulphonate) increased with the SO2-HMDSO mass flow rate ratio. Dogs
8599276 Usual evaluation of the relationship between oxygen delivery (DO2) and oxygen uptake (VO2) is based on the arterial oxygen tension (pO2), oxygen saturation (sO2), haemoglobin concentration (ctHb), the same indicators in mixed venous blood and cardiac output, sometimes supplemented by the expiratory carbon dioxide concentration. Human
7871428 Oxygen-containing molecules were conspicuous by their absence; upper limits for SO2, SO, CO, SiO, and H2O are derived. unknown
8599296 Blood gas analysis is commonly used as a macro indicator of oxygen supply, state of art blood gas analysers provide information for oxygen tension (pO2), haemoglobin oxygen saturation (SO2) and concentration (THb), ideally, in arterial and mixed venous blood. Human
8620722 None of the children died who required < or = 3L/min of O2 to maintain SO2 > or = 95%, but 79% of the children who required > 3L/min O2 died. Human
8620722 Using the criteria "> 3 L/min O2 by nasal cannula to maintain SO2 > or = 95%" to identify the nonsurvivors had a sensitivity of 100% and specificity of 88%. unknown
8620722 All children who required mechanical ventilatory support for respiratory failure had previously received > 3 L/min O2 by nasal cannula to maintain SO2 > or = 95% for 37.8 +/- 12.9 h (range 3 to 96 h). unknown
8620722 CONCLUSION: In children with acute leukemia and pneumonia, the amount of O2 required to maintain SO2 > or = 95% may identify those who are likely to develop respiratory failure hours before mechanical ventilatory support is needed. unknown
8623780 Various PO2 and oxygen saturation (SO2) values were obtained by varying the oxygen concentrations at the oxygenator membrane. Sheep
8623780 Fetal coronary oxygenation was represented by left ventricle PO2 and SO2 and cranial oxygen by carotid artery PO2 and SO2. unknown
8623780 RESULTS: We classified oxygen saturation as low, medium, and high on the basis of the level of postmembrane SO2. unknown
8639261 Hemoglobin oxygen saturation in hepatic tissue (H-So2) after reperfusion was determined using near-infrared spectroscopy. Human
8639261 As a whole, mean H-So2 was negatively correlated and the coefficient of variation (CV) of H-So2 was positively correlated with graft tissue oxygen consumption at the end of the operation; grafts whose H-So2 showed a secondary decrease had better initial function. unknown
8639261 These results suggest that H-So2 level reflects tissue oxygen consumption as well as oxygenation, and that the dissociation of both factors can occur in hepatic graft reperfusion. unknown
8748406 Tissue oxygenation and its heterogeneity were investigated by measuring oxygen saturation of hemoglobin in the liver sinusoid (SO2), coefficient of variation of SO2, and arterial ketone body ratio. Human
9016751 The extensive literature search was conducted for carbon monoxide (CO), carbon dioxide (CO2), hydrogen cyanide (HCN), low oxygen, hydrogen fluoride (HF), hydrogen chloride (HCl), hydrogen bromide (HBr), nitrogen dioxide (NO2), sulfur dioxide (SO2), acrolein (CH2CHCHO), and heat exposures. Human
8946578 Oxygenation of whole blood from trout in vitro, resulted in a non-linear release of Bohr protons over the haemoglobin-oxygen (Hb-O2) equilibrium curve, where the majority of Bohr protons were released between 60 and 100% of Hb oxygen saturation (SO2). Oncorhynchus mykiss
8970628 Postoperative changes in the oxygen saturation of hemoglobin in the graft liver (graft SO2) were monitored by near-infrared spectroscopy in four cases complicated by hepatopulmonary syndrome. Human
8970628 (2) Graft SO2 was maintained despite severe hypoxemia, with partial pressure of oxygen in arterial blood as low as 50 mmHg. unknown
9112906 METHODS: Haemoglobin oxygen saturation (SO2) was measured with macro- and micro-lightguide spectrophotometry in clinically normal skin at the gaiter area with the leg in the supine position, raised to 45 degrees and on standing. Human
9150784 RESULTS: Oxygen saturation and end-tidal carbon dioxide concentration remained unchanged using ventilation via facemask (SO2 98.5 +/- 0.9%, FECO2 4.5 +/- 0.7 vol%) or pharyngeal tube (SO2 98.6 +/- 0.7%, FECO2 4.8 +/- 0.4 vol%). Human
9201049 The intracranial cerebral pressure (ICP) and jugular venous oxygen saturation (SO2) also were continuously monitored in five patients and three patients, respectively. Human
9173974 Results showed the membrane segment contributing the major resistance, with the RBC segment resistance increasing as O2 saturation (SO2) rises during the RBC transit: RBC contributed 7% of the total resistance at the capillary inlet (SO2 = 75%) and 30% toward the capillary end (SO2 = 95%) for a 45% hematocrit (Hct). Human
9378834 Hemoglobin oxygen saturation (SO2) in the gingiva was measured by non-invasive tissue reflectance spectrophotometry. Dogs
9221202 The most important pollutants of industrial air pollution of the external air are sulfur dioxide (SO2), nitric oxides (NOX), oxygen radicals (ozone, O3) and sulfur dust. Human
8781847 Respired gases and ventilation (VE) were analysed breath-by-breath, partial pressure of oxygen (PO2) and oxygen saturation (SO2) were measured in capillary blood. Human
8781847 The HVR was expressed as the DVE at a PO2 of 40 mmHg (DVE40) and the DVE versus decrease of SO2 (DVE/[100-SO2]). unknown
8954292 Concentrations of prolactin (PRL), growth hormone (GH), testosterone (T), adrenocorticotropic hormone (ACTH), cortisol (COR), adrenalin (A), noradrenalin (NA), insulin (INS), ammonia (NH3), free fatty acids, serotonin (5-HT), total protein, branched-chain amino acids (BCAA) and free tryptophan (free TRP) were determined in venous blood and lactate concentration [LA-], partial pressure of oxygen (PO2), oxygen saturation (SO2), partial pressure of carbon dioxide and pH in capillary blood. unknown
8954292 The PO2 and SO2 were augmented in HE and decreased in HO (P < or = 0.01). unknown
9130177 The chemoreceptor activities were assessed by resting estimates of hypercapnic ventilatory response (delta VE/delta PCO2, HCVR) and hypoxic ventilatory response (delta VE/-delta SO2, HVR), respectively, where VE is minute ventilation and SO2 is oxygen saturation. Human
9271279 Furthermore, the arterial (SaO2) and portal venous oxygen saturation (S(PV)O2) was determined at the same time points. unknown
9279207 To compare histidine-tryptophan-ketoglutarate (HTK) and University of Wisconsin (UW) solution in terms of tissue oxygenation in living-related liver transplantation, oxygen saturation of haemoglobin (SO2) in hepatic tissue and its heterogeneity (CV, coefficient of variation) were measured by near-infrared spectroscopy. unknown
9284290 A newly developed microscope using acousto-optic tunable filters (AOTFs) was used to generate in vivo hemoglobin saturation (SO2) and oxygen tension (PO2) maps in the cerebral cortex of mice. Mice
9284290 As the inspiratory O2 was stepped from hypoxia (10% O2), through normoxia (21% O2), to hyperoxia (60% O2), measured SO2 and PO2 levels rose accordingly and predictably throughout. unknown
9284290 A plot of SO2 versus PO2 in different arterial and venous regions of the pial vessels conformed to the sigmoidal shape of the oxygen-hemoglobin dissociation curve, providing further validation of the two mapping procedures. unknown
9447856 Blood arterial (SaO2) and jugular bulb venous (S[jv]O2) saturations during each P(ET)O2 interval were determined by co-oximetry. unknown
9508665 The traditional parameters such as the oxygen tension (pO2) and the haemoglobin oxygen saturation (sO2) obtained from arterial blood samples are not always sufficient in clinical practice. Human
9500248 A nomogram providing the arterial mixed venous haemoglobin saturation difference (S(a-v)O2) corresponding to normal oxygen consumption (VO2) during cardiopulmonary bypass (CPB) was produced. Human
9691928 Oxygen saturation (So2) in these groups was respectively: 96%, 96%, 96%, and 93% (NS). Human
9694661 It is suggested that C/H/O/S ratios are important factors in controlling the degree of prebiotic organic synthesis and, hence, the emergence of life, since if oxygen is abundant, CO2 and SO2 would have been dominant species. unknown
9723569 To investigate the degree of improvement in SaO2 by blood transfusion, we determined the hemoglobin oxygen affinity, transcutaneous oxygen saturation (Tc-SO2), and pulse rate before and after automated partial exchange transfusion (erythrocytapheresis). Human
9723569 Approximately 50% of the increase in Tc-SO2 after erythrocytapheresis could be explained by the increase in hemoglobin oxygen affinity. unknown
9723569 An increase in arterial oxygen pressure (PaO2) following erythrocytapheresis, suggested by the calculated PaO2 in this study, may explain some of the increase in Tc-SO2. unknown
9723569 We conclude that improvement in Tc-SO2 in patients with sickle cell disease resulted from changes in hemoglobin oxygen affinity as well as blood oxygen pressure following erythrocytapheresis. unknown
9594848 METHODS: We measured the myocardial tissue oxygen saturation (SO2) during reperfusion using near-infrared spectroscopy. Dogs
9758097 Systolic (SAP), diastolic (DAP), and mean (MAP) arterial blood pressures, heart rate (HR), ECG, respiratory rate, an estimation of the saturation of haemoglobin with oxygen in peripheral arterial blood (S(p)O2), nasal temperature, end-tidal CO2(ET(CO2)), end-tidal sevoflurane (ET(SEVO)), and vaporiser concentration were recorded every 5 min post induction; arterial blood samples were obtained soon after induction, at 30 min after induction, and every hour thereafter until surgery was completed. Horses
9780664 The oxyhemoglobin ratio (O2Hb), reduced hemoglobin ratio (RHb) and oxygen saturation (sO2) were measured by oximetric analysis. Human
9832022 Two fitting algorithms (nonlinear least squares and singular value decomposition) which exploit the broad spectral range provided by these measurements (170 data points spanning 164 nm in a single acquisition) are used to determine haemoglobin oxygen saturation (SO2) from SSDR spectra collected over a wide range of measured oxygen partial pressures. Human
9866342 In the canine model of ischemia and reperfusion, we measured myocardial tissue oxygen saturation (SO2) continuously using near-infrared spectroscopy to determine the effect of IP on myocardial oxygen metabolism. Dogs
9931209 We hypothesized that near-infrared spectroscopy (NIRS) measures of hemoglobin and/or myoglobin O2 saturation (IR-SO2) in the vascular bed of exercising muscle would parallel changes in femoral venous O2 saturation (SfvO2) at the onset of leg-kicking exercise in humans. Human
9931217 A method for noninvasive measurement of Hb O2 saturation (SO2) in retinal blood vessels by digital imaging was developed and tested. Human
9931217 Retinal arterial SO2 was varied experimentally by having subjects breathe mixtures of O2 and N2 while systemic arterial SO2 was monitored with a pulse oximeter. unknown
9931217 Breathing 100% O2 increased venous SO2 by 19.2 +/- 2.9%. unknown
10089576 At the arterial end of cortical capillaries, PO2 averaged 57.9+/-10.6 mmHg, n=19, (or, in terms of blood oxygen saturation SO2; 82+/-9%) and 258+/-19 microm downstream 40.9+/-11.5 mmHg, n=19, (SO2 59+/-18%). Rats
10206281 We have evaluated the ability of steady-state, radially-resolved, broad-band near infrared diffuse reflectance spectroscopy to measure carbogen-induced changes in haemoglobin oxygen saturation (SO2) and total haemoglobin concentration in a rat R3230 mammary adenocarcinoma model in vivo. Rats
10021497 In this study we investigate whether a right shift in the OEC of hemoglobin decreases transcutaneous oxygen saturation (Tc-SO2) following the administration of an allosteric effector, 2-[4-(((3, 5-dichloroanilino)-carbonyl) methyl) phenoxy]-2-methylpropionic acid (RSR-4). Rabbits
10211806 The model is a solid plastic structure containing a vascular network perfused with blood in which haemoglobin oxygen saturation (SO2) was measured by co-oximetry, providing a standard for comparison. Human
10354696 The aim of the was to compare the effects of T or R on exercise tolerance (ET) and percutaneous oxygen saturation (SO2) at rest and at the peak exercise in 21 patients with COPD (FEV1, 1.29 L +/- 0.5) Eleven patients with COPD were treated with oxygen (17 hour per day) for 14 days and 10 patients were rehabilitated. Human
10392680 INTERVENTIONS: Patients were allocated to receive placebo (eight patients), dopamine (eight patients), or milrinone (eight patients) during CPB, and at seven times intraoperatively assays were performed of arterial and hepatic venous endotoxin levels, as well as measurements and/or calculations of intramucosal gastric pH (pHi), arterial and hepatic venous lactate-pyruvate ratio (lac/pyr), and hepatic venous oxygen saturation (S(HV)O2). Human
10473213 The oxygen saturation of haemoglobin (SO2) was changed from 64.9% to 8.0%, and the haemoglobin content (THB) from 189.1 microM to 131.6 microM by ischaemia. Rats
10583338 The transcutaneous pO2 (tcpO2) and pCO2 and the oxygen saturation (sO2) were analysed. Human
10694041 These results suggest that when leaves are fumigated with SO2 in the light, catalase is inactivated resulting in the accumulation of H2O2 in leaves, which can oxidize sulfite without generating active oxygen species like O2- as long as ascorbate is present in leaves. unknown
10988183 Using standard equations, arterial and mixed venous O2 contents were calculated from hemoglobin concentration (Hb), oxyhemoglobin saturation (SO2), and PO2, whereas CO2 contents were calculated from PCO2, pH, Hb, and SO2. unknown
10029341 Oxygen saturation (SO2) was slightly lower in CF. but remained above 90% during exercise (92.7% vs 95.2%). unknown
10029341 With a F(I)O2 of 0.40, SO2 increased to about 97% in both groups; while R remained higher in CF (0.92) compared to HC (0.81). unknown
10029341 In CF patients low AR and PS would indicate an attenuated VO2 response attributable to an impaired oxygen utilization in the muscles because the oxygen supplement normalised SO2 but failed to improve R and VO2 kinetics. unknown
9459518 The prevention of AMS by PEEP was evaluated by scoring AMS according to the Lake Louise system (self-report questionnaire and clinical assessment) throughout the experiment with O2 saturation (SO2) and heart rate measurements being made. Human
10988183 Using standard equations, arterial and mixed venous O2 contents were calculated from hemoglobin concentration (Hb), oxyhemoglobin saturation (SO2), and PO2, whereas CO2 contents were calculated from PCO2, pH, Hb, and SO2. unknown
10958621 The present work deals with the investigation of blood oxygen saturation SO2 and photosensitizer fluorescence during and immediately after light irradiation in the photodynamic therapy process. unknown
10988183 Using standard equations, arterial and mixed venous O2 contents were calculated from hemoglobin concentration (Hb), oxyhemoglobin saturation (SO2), and PO2, whereas CO2 contents were calculated from PCO2, pH, Hb, and SO2. unknown
11004999 Sequential measurements of blood oxygen saturation (SO2) are made when oxygenated blood is subjected to conditions similar to those in the myocardium. unknown
11039570 OBJECTIVE: To determine components of the increase in oxygen consumption (VO2) and evaluate determinants of hemoglobin saturation (SO2) during incremental treadmill exercise in unfit horses. Unknown
11118487 Total RNA was extracted from fetal adrenal glands collected at specific time points at 3-20 h after the onset of either hypoxia ( approximately 50% reduction in fetal arterial oxygen saturation (SO2) for 30 min), or normoxia. unknown
11091979 The objective of this study was to generate data that allow for estimation of the validity of oxygen saturation (SO2) values in superficial cortical capillaries as calculated by a microreflectometric system (EMPHO II). Unknown
11091979 Capillary SO2 and tissue oxygen pressure (PtO2) were measured simultaneously in the cortex of n = 13 Wistar rats under normocapnic (PaCO2 = 36 mmHg) arterial normoxia (PaO2 = 92 mmHg), moderate (paO2 = 53 mmHg) and severe hypoxic hypoxia (PaO2 = 31 mmHg) with microreflectometry and multiwire surface electrodes. unknown
11091979 In a Hill-plot (log PtO2 versus log SO2/(100 - SO2)) an in vivo tissue oxygen dissociation curve was obtained and a linear regression/correlation analysis performed. unknown
11091979 We conclude that SO2 values calculated by the algorithm of the applied microreflectometric system reflect very accurately cortical oxygen supply over a very wide range of oxygenation levels when compared to a gold standard reference. unknown
11117230 Oxygen (O2) transfer from the blood to tissues is a function of the red blood cell (RBC) O2 saturation (SO2), the plasma O2 content being negligible. unknown
11117230 Under conditions of increased tissue O2 demand, the SO2 of arterial blood does not change appreciably (97%); however, the SO2 of mixed venous blood, equal to that of the perfused tissues, can go as low as 20%. unknown
11129400 Room air arterial oxygen partial pressure (pO2), arterial carbon dioxide partial pressure (pCO2), pH, arterial oxyhemoglobin saturation (SO2), and alveolar-arterial oxygen gradient [D(A-a)O2] were performed on hospital admission of 75 patients with confirmed PE (CPE) and were compared with data from 43 patients with unconfirmed PE (UCPE). Unknown
11220637 Calibration models between NIR spectra and reference measurements of tissue pH, hepatic venous oxygen saturation (S(V)O2), and blood hemoglobin concentration (Hb) were developed using partial least-squares regression. Unknown
11224822 Arterial oxygen saturation (% S(P)O2) fell to 95.6 +/- 1% during the first work bout and remained at 94% throughout exercise: the 60-s rest intervals were adequate to restore % S(P)O2) to 97%. Unknown
11220571 Based on formation and subsequent hydrolysis of base - SO3 adducts the stoichiometric factor for water is determined by type and concentration of the base, by the concentration of water and by the solvent itself. - In K.F. reagents the oxidation of SO2 by aerial oxygen to sulfate and alkyl sulfate takes place as a side reaction. unknown
11322538 Designs for a low-cost dual wavelength transducer based on light transmittance and a disposable cuvette for monitoring oxygen saturation (SO2) in extracorporeal arterial and venous blood are presented. Unknown
11369351 The oxygen saturation (SO2) was determined (n=1328) on a reference CO oximeter (ABL625, Radiometer Copenhagen) and on three tested instruments (two CO oximeters: Chiron865, Bayer Diagnostics; ABL700, Radiometer Copenhagen, and a portable blood gas analyser, i-STAT, Abbott). unknown
11369362 Each cuvette measures pCO2, pO2, pH, total hemoglobin (ctHb), oxygen saturation (sO2), fractions of carboxyhemoglobin (FCOHb) and methemoglobin (FMetHb) on 95 microl whole blood with a 110-s measuring cycle. Unknown
11482398 The existence of O2 has no significant effect on the absorption rate of SO2. unknown
11575793 The technique takes advantage of the easy pyrolysis of Ag2SO4 to SO2, O2, and Ag metal in a continuous flow system. unknown