A chest physician performs bronchoscopy in the procedure room of the out patient depament. To make the instrument safe for use in the next patient waiting outside, the most appropriate method to disinfect the endoscope is by:
**Core Concept**
The correct answer is related to the proper disinfection and reprocessing of flexible endoscopes to prevent the transmission of infectious diseases, such as tuberculosis or adenovirus. This requires the use of a high-level disinfectant that can penetrate the complex channels and crevices of the endoscope.
**Why the Correct Answer is Right**
The most effective method for disinfecting the endoscope is immersion in a high-level disinfectant solution, such as glutaraldehyde (2.5% solution). This process involves soaking the endoscope in the solution for the recommended time, usually 20-30 minutes, to ensure that all surfaces are exposed to the disinfectant. The glutaraldehyde solution penetrates the endoscope's channels and crevices, killing bacteria, viruses, and fungi. This is the recommended method by the Centers for Disease Control and Prevention (CDC) and the Society of Gastrointestinal Endoscopists.
**Why Each Wrong Option is Incorrect**
* **Option A:** Autoclaving is not suitable for flexible endoscopes as it can cause damage to the delicate components and is not effective for disinfecting the complex channels and crevices.
* **Option B:** Bleach solution is not typically used for high-level disinfection of endoscopes, as it is not as effective as glutaraldehyde and can damage certain materials.
* **Option C:** Isopropyl alcohol is not effective for high-level disinfection of endoscopes, as it is primarily used for low-level disinfection of surfaces.
**Clinical Pearl / High-Yield Fact**
When reprocessing endoscopes, it is essential to follow the manufacturer's instructions and guidelines from reputable organizations, such as the CDC and the Society of Gastrointestinal Endoscopists, to ensure that the endoscope is properly disinfected and safe for use in the next patient.
**Correct Answer: C. Glutaraldehyde (2.5% solution)**