Source: Annual Congress 2002 - Monitoring respiratory parameters in critically ill patients
Disease area: Sleep and breathing disorders

Abstract

During upper digestive endoscopy occur arterial oxygen desaturations that may favour cardiopulmonary complications. The aim of this study was to evaluate desaturation occurring during transesophageal echocardiography and the influence in desaturation of prior obstructive respiratory pathology, the use of midazolam as premedication, and age.
A total of 42 consecutive patients (27 males and 15 females with a mean age of 62 years) undergoing elective transesophageal echocardiography were studied. Clinical history and simple spirometry were obtained before echocardiography; during the procedure, a continuous monitoring of oxygen saturation and heart rate with pulse oximetry was recorded. 13 patients were considered obstructive (Tiffeneau < 70). No patient received oxygen during the procedure; 13 patients were premedicated with midazolam and 21 patients were aged 65 years or more.
Nine patients (21.4%) desaturated (SaO2 < 90%). Obstructive patients showed significantly lower initial (92.4% vs. 95.2%), minimal (88.1% vs. 92.9%) and final (91.5% vs. 95.6%) saturation than non-obstructive. Patients over 65 years of age showed lower minimal saturation (89.6% vs. 93.3%) and longer desaturation time (18.1sc vs. 4.8sc) than younger patients. No differences were observed with the use of midazolam. The procedure was well tolerated, with a minimum saturation (91.4%) higher than that recorded by our group in other endoscopic procedures (communications at Berlin-1997, Geneve-1998 and Florence-2000 ERS Congress).

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Citations should be made in the following way:
M. Egido, P. Val, L. Borderías, J. P. Gomollón, R. Biescas, J. Garrapiz (Huesca, Spain). Pulse oximetry monitoring during transesophageal echocardiography. Eur Respir J 2002; 20: Suppl. 38, 627

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