dc.creatorAltermatt, FR
dc.creatorMunoz, HR
dc.creatorDelfino, AE
dc.creatorCortinez, LI
dc.date.accessioned2024-01-10T13:52:27Z
dc.date.available2024-01-10T13:52:27Z
dc.date.created2024-01-10T13:52:27Z
dc.date.issued2005
dc.identifier10.1093/bja/aei231
dc.identifier1471-6771
dc.identifier0007-0912
dc.identifierMEDLINE:16143575
dc.identifierhttps://doi.org/10.1093/bja/aei231
dc.identifierhttps://repositorio.uc.cl/handle/11534/79664
dc.identifierWOS:000232595900022
dc.description.abstractBackground. In obese patients, reduced functional residual capacity exacerbated by supine position might decrease the effectiveness of pre-oxygenation and the tolerance to apnoea. The aim of this study was to compare the effect of body posture during pre-oxygenation, sitting or supine, on its effectiveness in obese patients.
dc.description.abstractMethods. Forty obese patients (BMI >= 35 kg m(-2)) undergoing surgery with general anaesthesia were randomly assigned to one of two groups: Group 1 (sitting, n=20) or Group 2 (supine, n=20). In the predetermined body position, pre-oxygenation was achieved with eight deep breaths within 60 s and an oxygen flow of 10 litre min(-1). After rapid sequence induction of anaesthesia in decubitus position, the trachea was intubated and the patient was left apneic and disconnected from the anaesthesia circuit until Sp(o2) decreased to 90%. The time taken for desaturation to 90% from the end of induction of anaesthesia was recorded. Arterial blood oxygen tension was measured before (baseline) and after pre-oxygenation. Values were compared with two-way anova and unpaired Student's t-test.
dc.description.abstractResults. Oxygen and carbon dioxide tensions were similar between groups, both at baseline and after pre-oxygenation. However, the mean time to desaturation to 90% was significantly longer in the sitting group compared with the supine group [mean (sd): 214 (28) vs 162 (38) s, P < 0.05].
dc.description.abstractConclusions. Pre-oxygenation in sitting position significantly extends the tolerance to apnoea in obese patients when compared with the supine position.
dc.languageen
dc.publisherELSEVIER SCI LTD
dc.rightsregistro bibliográfico
dc.subjectanaesthetic techniques, pre-oxygenation
dc.subjectcomplications, obesity
dc.subjectposition, effects
dc.subjectPREOXYGENATION
dc.subjectWOMEN
dc.titlePre-oxygenation in the obese patient: effects of position on tolerance to apnoea
dc.typeartículo


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