Predictive factors of oxygen desaturation of patients submitted to endoscopic retrograde cholangiopancreatography under conscious sedation

Abstract

The variables of age of 60 years old or more, and ASA III score are identified as increased risk for desaturation for patients who undergo endoscopic retrograde cholangiopancreatography under conscious sedation. Long time of exam suggests the patient oxygen desaturate. Such patients require very close monitoring to desaturation and hypoventilation by the assistants and nursing staff alerting to respiratory depression. The use of pulse oximeter and asking for deep breaths during the exam helps to diminish such risks.

Efficacy and Safety of Therapeutic ERCP for the Elderly with Choledocholithiasis: Comparison with Younger Patients

“…However, oxygen desaturation or hypotension caused by sedative agents is a matter of concern. Muller et al (23) reported that ages >60 years and ASA score III are predictive factors of oxygen desaturation during ERCP. Therefore, more attention should be paid to vital signs in the elderly than in younger patients during ERCP after administration of sedatives.…”

Risk Factors for Hypoxemia During Ambulatory Gastrointestinal Endoscopy in ASA I–II Patients

“…Therefore, sedation and intubation appear to be the strongest risk factors of apnea, which may in turn lead to hypoxemia. Longer duration of procedures has also been associated with increased incidence of hypoxemia [22]. Therapeutic procedures, due to their longer duration, are therefore more likely to be associated with hypoxemia.…”

Noninvasive ventilation during spontaneous breathing anesthesia: an observational study using electrical impedance tomography

“…However, hypoxemia can occur during this type of anesthesia. In a series of 186 patients submitted to endoscopic retrograde cholangiopancreatography, desaturation (SpO 2 b 92%) was found in 40% of patients [2]. Hypoxemia may be due to effects of analgesic and sedative drugs on respiratory function.…”