The following instruments can be sterilized by boiling except?

IGIMS Staff Nurse - 2018

Fundamental of Nursing

Medium

Appeared in: IGIMS Staff Nurse - 2018

Explanation

'Scissor' because it is a sharp, cutting instrument.
Boiling water causes the fine, precision-ground edges of scissors to become dull or blunted, which compromises their cutting ability.
The turbulent action of boiling water can cause the blades to knock against each other or the container, further damaging the sharp edges.
Dry heat sterilization (using a hot air oven) or chemical sterilization are the preferred methods for sharp instruments as they do not damage the cutting edge.

Option A: A speculum is a blunt instrument used for viewing body cavities. It has no sharp edges that would be damaged by boiling.
Option B: Artery forceps are grasping instruments used to clamp blood vessels. They are robust and do not have a fine cutting edge, so boiling does not damage their primary function.
Option D: Dissecting forceps are used for grasping and holding tissue. They do not have a cutting function, and their tips are not sharp in a way that would be dulled by boiling.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sterilization methods for surgical instruments and their contraindications as background academic context rather than a clinical decision trigger.
Proper instrument sterilization is a cornerstone of infection control and patient safety. Using a non-sterile or improperly sterilized instrument can lead to surgical site infections (SSIs).
Using the correct sterilization method also preserves the life and function of expensive surgical instruments. A dull scissor can crush tissue instead of cutting it cleanly, leading to increased tissue trauma and poor healing.
What if? If a hospital only had access to a boiler and not an autoclave or hot air oven (e.g., in a low-resource setting), the nurse's priority would be to use boiling for blunt instruments and seek alternative sterile options for procedures requiring sharp instruments, such as using pre-packaged sterile disposable scalpels or scissors.

How to Approach the Question

First, identify the keyword 'except' in the question. This means you are looking for the option that does NOT fit the condition (cannot be sterilized by boiling).
Next, analyze the condition: 'sterilized by boiling'. Recall the principles of boiling as a disinfection/sterilization method.
Categorize each instrument in the options based on its function and physical properties: Is it a sharp/cutting instrument or a blunt/grasping instrument?
Evaluate how boiling would affect each type of instrument. Boiling water involves heat and moisture, which can cause corrosion, and physical turbulence, which can damage fine edges.
The instrument whose function would be most compromised by boiling is the correct answer. Sharp instruments rely on their fine edge, which is easily damaged.

Concept Tested & Keywords

Concept Tested: Sterilization methods for surgical instruments and their contraindications.
Stem keywords: instruments, sterilized, boiling
Lead-in keywords: except
Negative lead-in flag: EXCEPT

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