The technician used for sterilization of instruments in a procedures. The cidex chemical used for sterilization will change after how many days?

Appeared in: NIMHANS Nursing Officer - 2019

Explanation

Cidex, a common brand for activated 2% glutaraldehyde, has a standard use-life of 14 days after it is activated.
After 14 days, the chemical undergoes a process called polymerization, which significantly reduces its biocidal activity, making it ineffective for proper sterilization.
This 14-day period is the standard manufacturer guideline for maintaining the Minimum Effective Concentration (MEC) required for high-level disinfection and sterilization.
It is crucial to discard the solution after this period to prevent the use of a sub-potent disinfectant, which could lead to healthcare-associated infections.

Option A: This is an unnecessarily short time frame. While the solution must be changed if it becomes visibly contaminated or fails a test strip, discarding it routinely at 7 days is not standard practice and is not cost-effective.
Option C: Similar to the 7-day option, this is shorter than the manufacturer-recommended use-life. There is no standard protocol that calls for a 10-day change.
Option D: This period exceeds the recommended 14-day use-life. Using the solution for 21 days poses a significant risk of instrument processing failure because the chemical's concentration will likely have fallen below the effective level.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Use-life of chemical sterilants as background academic context rather than a clinical decision trigger.
Strict adherence to the 14-day use-life is a critical nursing responsibility for infection control, directly impacting patient safety by preventing healthcare-associated infections (HAIs) from improperly sterilized equipment.
Nurses must meticulously document the activation and expiry dates on the solution's container. This is a key part of quality control and regulatory compliance in any healthcare setting.
What if? If a chemical test strip indicates the glutaraldehyde concentration has fallen below the minimum effective concentration (MEC) on day 10, the nurse must discard the solution immediately, regardless of the 14-day guideline. Patient safety always overrides the maximum use-life period.

How to Approach the Question

This is a factual recall question testing your knowledge of infection control standards.
Identify the keyword in the question: 'Cidex'. Recognize this as a brand name for glutaraldehyde, a common chemical sterilant.
The question asks for the duration after which the chemical should be changed, which refers to its 'use-life' after activation.
Recall the standard, widely-taught use-life for activated 2% glutaraldehyde. This is a critical piece of information for nursing practice.
The standard use-life is 14 days. Select this option and eliminate others that are either too short (7, 10 days) or too long (21 days), as these deviate from the established safety and efficacy guidelines.

Concept Tested & Keywords

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E6 Pharmacology Katzung 16e p. 1397-1399

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