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Falls in hemoglobin saturation during ERCP and upper gastrointestinal endoscopy
1Department of Surgery, University of Hong Kong, Queen Mary Hospital.
World Journal of Surgery
|January 1, 1991
Summary
Endoscopic procedures can cause significant drops in hemoglobin saturation (SaO2), particularly during scope insertion. Pulse oximetry monitoring is crucial for anticipating cardiopulmonary complications during these gastroenterology interventions.
Area of Science:
- Gastroenterology
- Cardiopulmonary Medicine
- Medical Device Technology
Background:
- Fiberoptic endoscopy is a common gastroenterology procedure with inherent risks, including cardiopulmonary complications.
- Pulse oximetry, measuring hemoglobin saturation (SaO2), can help anticipate these risks.
Purpose of the Study:
- To investigate the impact of fiberoptic endoscopy on SaO2 and pulse rate.
- To identify specific procedural phases associated with SaO2 decline.
Main Methods:
- Studied 132 patients undergoing endoscopic retrograde cholangiopancreatography (ERCP) under sedation and 51 undergoing esophagogastroduodenoscopy (EGD) without sedation.
- Monitored SaO2 and pulse rate, noting changes during different procedural stages.
- Subgroup analyses included respiratory patterns and peripheral perfusion monitoring.
Main Results:
- Significant SaO2 falls occurred in both ERCP (95.7% to 88.9%) and EGD (97.3% to 93.9%) groups (p < 0.001).
- Largest SaO2 drops were associated with endoscope insertion, particularly within one minute of sedation administration.
- No correlation found between SaO2 changes and respiratory patterns or peripheral perfusion.
Conclusions:
- Endoscopy, especially ERCP, leads to significant, multifactorial SaO2 reduction.
- Endoscope insertion is a critical phase for SaO2 decline, necessitating vigilant monitoring.