Continuous Monitoring of Arterial Oxygen Saturation with Pulse Oximetry During Spinal Anesthesia

1987 ◽  
Vol 12 (2) ◽  
pp. 63-69 ◽  
Author(s):  
Michael J. Davies ◽  
David A. Scott ◽  
Paul T. Cook
Keyword(s):  
Oxygen Saturation ◽  
Spinal Anesthesia ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Spinal Block ◽  
Lithotomy Position ◽  
Oxygen Administration ◽  
Paper Chart ◽  
Chart Recorder ◽  
Clinically Significant

Oxygen saturation in eighty-two patients having elective urologic and gynecologic procedures in the lithotomy position using spinal anesthesia was studied to determine if clinically significant changes of oxygen saturation occurred during these procedures. The oxygen saturation was measured using the pulse oximeter and recorded on a paper chart recorder. Forty-eight patients sustained a normal oxygen saturation throughout the procedure. Twenty-one patients showed a trend of falling oxygen saturation of 3.4% (range: 2-6%). Fourteen patients had transient changes of less than 2-minute durations with falls in oxygen saturation averaging 6.4% (range: 2-14%). Minor artifacts in the oxygen saturation trace occurred in 28 patients, and major artifacts preventing interpretation of the oxygen saturation occurred in 10 patients. There was no correlation between the changes in oxygen saturation observed and the age, weight, height, body mass index, physical status, or height of the spinal block. The effects of hypotension and sedation on oxygen saturation during spinal anesthesia needs further study. It was therefore concluded that although a minimum of patients have clinically significant oxygen desaturation while breathing air during these surgical procedures, oxygen administration would minimize the risk of significant hypoxia.

scholarly journals Does Passive Leg Activity Influence Oxygen Saturation and Activity in Sedentary Elderly Adults?

2006 ◽  
Vol 6 ◽  
pp. 1075-1080 ◽  
Author(s):  
Eli Carmeli ◽  
Gadi Bartur ◽  
Sara Peleg ◽  
Shemuel Barchad ◽  
Jean-Jacques Vatine
Keyword(s):  
Oxygen Saturation ◽  
Daily Living ◽  
General Trend ◽  
Arterial Oxygen Saturation ◽  
Passive Treatment ◽  
Arterial Oxygen ◽  
Physiological Changes ◽  
Elderly Adults ◽  
Clinically Significant ◽  
Passive Training

This study aimed to investigate whether any physiological changes might have a clinically significant effect on function in sedentary, institutionalized, older adults treated by a passive training program. A total of 18 subjects (mean age 60.7 ± 3.4) with intellectual disability (ID) participated. We measured SpO2 (arterial oxygen saturation) before, during, and after passive training, and used Barthel Index to measure daily living activities. The general trend indicated that inactive people with ID evidenced a continual increase in SpO2% levels and some functional gains during passive treatment, with superiority to manual passive treatment compared to mechanical active passive training. For current clinical practice, most sedentary patients who experience clinically significant deconditioning and desaturation can benefit from passive treatment.

scholarly journals Arterial Oxygen Saturation in Anaesthetised Patients during Transfer from Induction Room to Operating Room

1988 ◽  
Vol 16 (2) ◽  
pp. 182-186 ◽  
Author(s):  
R. H. Riley ◽  
N. J. Davis ◽  
K. E. Finucane ◽  
P. Christmas
Keyword(s):  
Oxygen Saturation ◽  
Operating Room ◽  
Arterial Oxygen Saturation ◽  
Face Mask ◽  
The Body ◽  
Arterial Oxygen ◽  
Chart Recorder ◽  
Induction Of Anaesthesia ◽  
Telemetry Ecg ◽  
Breathing Room

There is no published study that examines oxygenation of anaesthetised patients during transport from anaesthesia induction room to operating room. Arterial oxygen saturation (S a O 2 ) was measured in twenty-five anaesthetised patients before and during transfer to an adjacent operating room and continuously recorded on a calibrated chart recorder. A telemetry ECG recorder was used to detect cardiac dysrhythmias. All anaesthetists followed their usual anaesthetic practice. Patients ventilated via face-mask and via endotracheal tube were studied. During transfer patients were either apnoeic (n = 8) or breathing room air spontaneously (n= 17) Mean S a o 2 before induction was 95.4 (SD 2.5)%, was higher after induction of anaesthesia, 98.5 (SD 1.4)% and fell after transfer, 95.7 (SD 2.6)%. A fall in S a O 2 was recorded for 21 patients. No S a O 2 value below 90% was seen. The decrease in S a O 2 was related to the time taken to transfer the patients and spontaneous ventilation (Multiple regression analysis); it was not related to the body mass index although two of the greatest decreases were seen in obese patients. Transfer time averaged 51 seconds (range: 24–97 s). No changes in cardiac rhythm were seen. Transfer of anaesthetised patients was accompanied by variable falls in S a O 2 which related to duration of transfer and spontaneous breathing of room air and which were not associated with new dysrhythmias.

scholarly journals Accuracy of two pulse-oximetry measurements for INTELLiVENT-ASV in mechanically ventilated patients: a prospective observational study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shinshu Katayama ◽  
Jun Shima ◽  
Ken Tonai ◽  
Kansuke Koyama ◽  
Shin Nunomiya
Keyword(s):  
Oxygen Saturation ◽  
Pulse Oximetry ◽  
Prospective Observational Study ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Arterial Blood Gas ◽  
Mechanically Ventilated ◽  
Mechanically Ventilated Patients ◽  
Arterial Blood ◽  
Ventilated Patients

AbstractRecently, maintaining a certain oxygen saturation measured by pulse oximetry (SpO2) range in mechanically ventilated patients was recommended; attaching the INTELLiVENT-ASV to ventilators might be beneficial. We evaluated the SpO2 measurement accuracy of a Nihon Kohden and a Masimo monitor compared to actual arterial oxygen saturation (SaO2). SpO2 was simultaneously measured by a Nihon Kohden and Masimo monitor in patients consecutively admitted to a general intensive care unit and mechanically ventilated. Bland–Altman plots were used to compare measured SpO2 with actual SaO2. One hundred mechanically ventilated patients and 1497 arterial blood gas results were reviewed. Mean SaO2 values, Nihon Kohden SpO2 measurements, and Masimo SpO2 measurements were 95.7%, 96.4%, and 96.9%, respectively. The Nihon Kohden SpO2 measurements were less biased than Masimo measurements; their precision was not significantly different. Nihon Kohden and Masimo SpO2 measurements were not significantly different in the “SaO2 < 94%” group (P = 0.083). In the “94% ≤ SaO2 < 98%” and “SaO2 ≥ 98%” groups, there were significant differences between the Nihon Kohden and Masimo SpO2 measurements (P < 0.0001; P = 0.006; respectively). Therefore, when using automatically controlling oxygenation with INTELLiVENT-ASV in mechanically ventilated patients, the Nihon Kohden SpO2 sensor is preferable.Trial registration UMIN000027671. Registered 7 June 2017.

scholarly journals BIOCHEMICAL STUDIES ON SHOCK

1944 ◽  
Vol 79 (1) ◽  
pp. 9-22 ◽  
Author(s):  
Frank L. Engel ◽  
Helen C. Harrison ◽  
C. N. H. Long
Keyword(s):  
Blood Pressure ◽  
Amino Acids ◽  
Oxygen Saturation ◽  
Hepatic Artery ◽  
Arterial Oxygen Saturation ◽  
Amino Nitrogen ◽  
Arterial Oxygen ◽  
High Positive Correlation ◽  
Peripheral Tissues ◽  
Arterial Blood

1. In a series of rats subjected to hemorrhage and shock a high negative correlation was found between the portal and peripheral venous oxygen saturations and the arterial blood pressure on the one hand, and the blood amino nitrogen levels on the other, and a high positive correlation between the portal and the peripheral oxygen saturations and between each of these and the blood pressure. 2. In five cats subjected to hemorrhage and shock the rise in plasma amino nitrogen and the fall in peripheral and portal venous oxygen saturations were confirmed. Further it was shown that the hepatic vein oxygen saturation falls early in shock while the arterial oxygen saturation showed no alteration except terminally, when it may fall also. 3. Ligation of the hepatic artery in rats did not affect the liver's ability to deaminate amino acids. Hemorrhage in a series of hepatic artery ligated rats did not produce any greater rise in the blood amino nitrogen than a similar hemorrhage in normal rats. The hepatic artery probably cannot compensate to any degree for the decrease in portal blood flow in shock. 4. An operation was devised whereby the viscera and portal circulation of the rat were eliminated and the liver maintained only on its arterial circulation. The ability of such a liver to metabolize amino acids was found to be less than either the normal or the hepatic artery ligated liver and to have very little reserve. 5. On complete occlusion of the circulation to the rat liver this organ was found to resist anoxia up to 45 minutes. With further anoxia irreversible damage to this organ's ability to handle amino acids occurred. 6. It is concluded that the blood amino nitrogen rise during shock results from an increased breakdown of protein in the peripheral tissues, the products of which accumulate either because they do not circulate through the liver at a sufficiently rapid rate or because with continued anoxia intrinsic damage may occur to the hepatic parenchyma so that it cannot dispose of amino acids.

Arterial Oxygen Saturation and Posture in Acute Stroke

1993 ◽  
Vol 22 (4) ◽  
pp. 269-272 ◽  
Author(s):  
JIMMY ELIZABETH ◽  
JOSEPH SINGARAYAR ◽  
JOHN ELLUL ◽  
DAVID BARER ◽  
MICHAEL LYE
Keyword(s):  
Oxygen Saturation ◽  
Acute Stroke ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen

scholarly journals The Levels and Duration of Sensory and Motor Blockades of Spinal Anesthesia in Obese Patients That Underwent Urological Operations in the Lithotomy Position

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Taner Ciftci ◽  
Ali Bestemi Kepekci ◽  
Hatice Pınar Yavasca ◽  
Hayrettin Daskaya ◽  
Volkan İnal
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Spinal Anesthesia ◽  
Tissue Blood Flow ◽  
Spinal Block ◽  
Lithotomy Position ◽  
Obese Patients ◽  
Hemodynamic Changes ◽  
Nonobese Patients ◽  
Transurethral Prostate Resection

Obesity has a significant effect on the cephalic spread of a spinal block (SB) due to a reduction in cerebrospinal fluid (CSF). SB is controlled by the tissue blood flow in addition to the CSF. Some positions and techniques of surgery used can cause changes in hemodynamics. We investigated effects of hemodynamic changes that may occur during Transurethral prostate resection (TUR-P) and lithotomy position (LP) at the SB level in obese versus nonobese individuals. Sixty patients who had undergone TUR-P operation under spinal anesthesia were divided into a nonobese (BMI<25 kg/m2, Group N) or obese (BMI≥30 kg/m2, Group O) group. SB assessments were recorded afterthe LP. SB at 6 and 120 min and the peak SB level were compared between two groups. Hemodynamics were recorded after LP. Peak and 6 min SB levels were similar between the groups, while 120 min SB levels were significantly higher for Group O (P<0.05). Blood pressure (BP) after the LP was significantly higher for Group N (P<0.05). LP and TUR-P increased the BP in Group N when compared to Group O. The increase in hemodynamics enhances the blood flow in the spinal cord and may form similar SB levels in nonobese patients to those in obese patients. However, SB time may be longer in obese patients.

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