Disposable endotracheal tube can be sterilized by using?

HPSSSB Staff Nurse - 2016

Applied Microbiology & Infection control

Medium

Appeared in: HPSSSB Staff Nurse - 2016

Explanation

Endotracheal tubes (ETTs) are made of heat-sensitive plastic and are classified as semicritical items that require sterilization or high-level disinfection.
Ethylene oxide (EO) is a low-temperature gas sterilization method that effectively kills all microorganisms, including spores, without damaging heat-sensitive materials.
EO works by altering the metabolic processes of cells, making it a reliable method for sterilizing items like plastic ETTs, catheters, and other complex medical devices.
The key differentiator is the material of the ETT (plastic) which cannot withstand high temperatures, necessitating a low-temperature sterilization process like EO.

Option B: Dry heat uses very high temperatures (160–180°C) which would melt, warp, or destroy the plastic material of an endotracheal tube.
Option C: Formaldehyde is primarily used as a disinfectant and for fumigating rooms. While it can be used for some heat-sensitive items, it is slower to kill spores and is a known potential carcinogen, making it less preferable than Ethylene Oxide for sterilizing critical medical devices.
Option D: Phenol and its derivatives are classified as disinfectants, not sterilants. They are effective against many bacteria and fungi but do not reliably kill bacterial spores, which is a requirement for sterilization.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sterilization methods for heat-sensitive medical equipment as background academic context rather than a clinical decision trigger.
Proper sterilization is a cornerstone of infection control. Using the wrong method can lead to device damage or, more critically, failure to eliminate pathogens, resulting in healthcare-associated infections (HAIs).
Nurses must always check the packaging of sterile equipment. For items sterilized with EO, the package will often be marked with "STERILE EO". This confirms the item was processed correctly and is safe for use.
Disposable, single-use items like most ETTs should never be re-sterilized or reused in a clinical setting. This practice is unsafe and violates manufacturer guidelines and infection control protocols.

How to Approach the Question

First, identify the item in question: a 'disposable endotracheal tube'.
Recall or determine the material of this item. Endotracheal tubes are made of plastic (PVC, silicone), which is heat-sensitive.
Next, analyze the core task: 'sterilized'. This means a process that kills all microbial life, including spores.
Evaluate each option based on its suitability for a heat-sensitive plastic item requiring sterilization.
Eliminate high-temperature methods like 'Dry heat' as they would damage the plastic.
Differentiate between sterilants and disinfectants. 'Phenol' is a disinfectant and cannot be the answer.

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