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Endoscope-induced colitis: description, probable cause by glutaraldehyde, and prevention
P Rozen1, G J Somjen, M Baratz
1Dept. of Gastroenterology, Tel Aviv Medical Center, Israel.
Gastrointestinal Endoscopy
|September 1, 1994
Summary
Iatrogenic colitis from flexible sigmoidoscopy may result from residual glutaraldehyde disinfectant. Proper endoscope disinfection protocols, including rinsing and drying, can prevent toxic residue accumulation and patient harm.
Area of Science:
- Gastroenterology
- Infectious Disease Prevention
- Medical Device Disinfection
Background:
- Flexible sigmoidoscopy is a common endoscopic procedure.
- Iatrogenic complications, such as colitis, can occur post-procedure.
- Disinfection of endoscopic equipment is critical to prevent patient harm.
Purpose of the Study:
- To investigate the cause of acute colitis following flexible sigmoidoscopy.
- To identify the role of glutaraldehyde residues from endoscope disinfection.
- To assess the accumulation of disinfectant residues in automatic disinfecting machines.
Main Methods:
- Analysis of six cases of acute colitis post-flexible sigmoidoscopy.
- Indirect estimation of glutaraldehyde residues using conductivity measurements.
- Measurement of electrolyte concentration in rinse water and on endoscope surfaces/channels over five disinfection cycles.
Main Results:
- Six cases of acute, self-limited colitis were linked to iatrogenic causes.
- Glutaraldehyde residues equivalent to 0.2% were found in rinse water and endoscope channels after five cycles.
- Residue accumulation resulted from technical and human errors in the disinfection process.
Conclusions:
- Glutaraldehyde residues from improper disinfection can cause iatrogenic colitis.
- Preventive measures include changing rinse water, using forced air drying, and pre-use washing.
- Awareness of potential toxic residue accumulation in automatic disinfecting machines is crucial for healthcare providers.