The recommended minimum temperature for a rigid endoscopic autoclave is:

RML MAINS 2025

Applied Microbiology & Infection control

Easy

Appeared in: RML MAINS 2025

Explanation

The standard minimum parameters for effective steam sterilization in a gravity displacement autoclave are 121°C for 15-20 minutes at 15 psi.
This method uses pressurized moist heat, which is highly effective at destroying all microorganisms, including bacterial spores.
Rigid endoscopes are constructed from heat-resistant materials, making them suitable for this sterilization process.
This temperature and time combination represents the baseline for ensuring sterility for heat-tolerant critical items.

Option B: This represents the parameters for a pre-vacuum or 'flash' steam sterilizer, not the standard minimum temperature.
Option C: A temperature of 100°C corresponds to boiling water at atmospheric pressure, which provides disinfection but not sterilization.
Option D: These parameters are for dry heat sterilization in a hot air oven, not for an autoclave which uses moist heat.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sterilization methods and parameters for medical equipment as background academic context rather than a clinical decision trigger.
Ensuring proper sterilization is a critical nursing responsibility to prevent healthcare-associated infections (HAIs). Using the wrong parameters can lead to instrument damage or, more dangerously, incomplete sterilization and patient infection.
Nurses must be able to differentiate between disinfection and sterilization. Sterilization kills all microbial life, including spores, and is required for critical items like surgical instruments that enter sterile body tissues.
What if a flexible endoscope is mistakenly placed in an autoclave? The high heat and pressure would melt and destroy the delicate components, rendering the expensive equipment useless and creating a patient safety risk if the damage is not immediately noticed.

How to Approach the Question

First, identify the key terms in the question: 'minimum temperature', 'rigid endoscopic', and 'autoclave'.
Recognize that 'autoclave' refers to steam sterilization (moist heat under pressure).
Recall the standard parameters for different types of sterilization. The question asks for the 'minimum' recommended temperature, which points to the baseline standard.
Differentiate the standard gravity displacement autoclave parameters (121°C) from other methods like pre-vacuum/flash sterilization (134°C), dry heat (160°C), and boiling (100°C).
Select the option that matches the standard minimum parameters for steam autoclaving heat-resistant instruments.

Concept Tested & Keywords

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