Which method is used to sterilize the surgical dressings?

Appeared in: HPSSSB Staff Nurse - 2016

Explanation

Autoclaving uses pressurized steam, which has superior penetrating power compared to dry heat, making it ideal for porous items like surgical dressings.
The high temperature (typically 121°C or 134°C) and moisture effectively denature the proteins of all microorganisms, including resilient bacterial spores, achieving complete sterilization.
It is a rapid, reliable, and cost-effective method widely used in hospitals for sterilizing most surgical supplies.

Option A: Tyndallisation is a fractional sterilization process that is too slow and less reliable for the demands of a surgical setting. It is not suitable for items like dressings.
Option C: Dry heat has poor penetrating ability for porous materials like dressings and can cause them to scorch or char at the high temperatures required for sterilization.
Option D: Pasteurization is a disinfection method, not a sterilization method. It kills most pathogenic microbes but does not eliminate bacterial spores, making it unsafe for surgical items.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sterilization methods for medical equipment as background academic context rather than a clinical decision trigger.
Proper sterilization of surgical dressings is critical in preventing Surgical Site Infections (SSIs), a major cause of postoperative morbidity.
Nurses are responsible for ensuring that all sterile packs are intact, dry, and within their expiration date before use. A compromised pack must be considered contaminated.
What if? If an autoclave is unavailable in a resource-limited setting, and only heat-stable instruments need sterilization, a pressure cooker can be used as a makeshift autoclave, provided pressure and time are carefully monitored. However, for dressings, pre-sterilized commercial packs are the only safe alternative.

How to Approach the Question

First, identify the core of the question: it asks for the sterilization method for 'surgical dressings'.
Recall the properties of surgical dressings: they are porous, fabric-based materials.
Analyze the options based on their mechanism. 'Sterilization' means killing all microbial life, including spores.
Evaluate each method's suitability for porous, fabric-based items. Moist heat (steam) penetrates fabrics better than dry heat.
Autoclaving uses moist heat under pressure, which is ideal for dressings. Dry heat would likely damage them. Pasteurization and Tyndallisation are not standard for surgical supplies.
Conclude that autoclaving is the most appropriate and widely used method.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) pp. 126-128, 127-129

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