title: Real-time analysis of the change in arterial oxygen tension during endotracheal suction with a fiberoptic bronchoscope.
abstract: An intra-arterial Clark-type polarographic oxygen electrode was used with a fiberoptic bronchoscope for real-time analysis of the PO2 change during 1 min of suction in patients spontaneously breathing oxygen. There was a strong correlation between values obtained from the intra-arterial electrode (PiO2) and those from blood samples (PaO2), before and at the end of suction; the PiO2/PaO2 ratio was close to one. Continuous PiO2 recordings during suction without supplemental oxygen showed little change in the early period of suction, followed by a steep drop continuing even after suction. This drop in PiO2 was partially attenuated by providing oxygen with high-frequency jet ventilation and was almost completely attenuated by the use of a suction adaptor. Changes in the inspired oxygen concentration indicated the importance of keeping this variable constant during suction to prevent hypoxemia.
mesh_terms: D000328:Adult; D000368:Aged; D001999:Bronchoscopy; D004566:Electrodes; D005260:Female; D005336:Fiber Optic Technology / Q000295:instrumentation; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D010100:Oxygen / Q000097:blood / Q000502:physiology*; D010313:Partial Pressure; D011182:Postoperative Care; D012119:Respiration; D012121:Respiration, Artificial / Q000295:instrumentation; D013396:Suction / Q000295:instrumentation; D013903:Thoracic Surgery; D013997:Time Factors
chemical_list: D010100:Oxygen