What is the instrument shown below?

Appeared in: OSSSC Nursing Officer-2021

Explanation

The instrument shown is a Tracheal Dilator, specifically the Trousseau type.
Its key identifying features, visible in the image, are the scissor-like handles, a ratchet lock, and short, blunt, outwardly curved blades.
This design is for gently opening a tracheostomy stoma to maintain airway patency or assist with tube reinsertion.
It is an essential piece of emergency equipment kept at the bedside of a patient with a tracheostomy.

Option A: Urethral dilators (sounds) are long, thin, solid instruments used to dilate the urethra. They lack the scissor handles, lock, and blunt, spreading tips seen in the image.
Option C: An aneurysm needle is a delicate instrument with a fine, curved tip that has an eyelet for passing ligatures around blood vessels. It does not resemble the robust, dilating instrument in the image.
Option D: The instrument is clearly identifiable as a specific medical tool, a Tracheal Dilator, making this option incorrect.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Surgical Instrument Identification as background academic context rather than a clinical decision trigger.
A tracheal dilator is a critical piece of emergency equipment that must be kept at the bedside of any patient with a tracheostomy.
In the event of accidental decannulation (the tracheostomy tube falling out), the nurse's immediate action is to use the dilator to keep the stoma open, ensuring the patient's airway remains patent while preparing for reinsertion of the tube.
What if the patient is a pediatric patient? A smaller-sized tracheal dilator, appropriate for the child's anatomy, would be required. The principle of keeping it at the bedside remains the same.

How to Approach the Question

First, carefully examine the image of the instrument, paying close attention to its distinct features: the shape of the handles, the presence of a lock, and the design of the tips.
Note the scissor-like handles, the ratchet lock, and the blunt, outwardly curved tips.
Consider the function implied by these features. The blunt, spreading tips suggest a dilating function rather than cutting or grasping.
Evaluate the given options based on your visual analysis and knowledge of medical instruments.
Eliminate 'Urethral dilator' and 'Aneurysm needle' as their known structures do not match the image.
Conclude that the instrument is a 'Tracheal dilator' based on the perfect match between its features and known function.

Concept Tested & Keywords

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E6 Nursing Fundamentals Taylor p. 736-738

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