Identify the following instrument which is used in diagnostic procedures:

Appeared in: AIIMS Delhi NO- 2019

Explanation

The image shows a semi-automated, spring-loaded biopsy gun, which utilizes a Tru-Cut style needle.
This instrument is designed to perform a core needle biopsy, obtaining a cylindrical tissue sample for histological analysis.
The mechanism involves an inner stylet with a specimen notch and an outer cutting cannula that slices and captures the tissue.
It is commonly used for biopsies of solid organs such as the breast, liver, and prostate to diagnose conditions like cancer.

Option B: A lumbar puncture needle is designed for accessing the subarachnoid space to collect cerebrospinal fluid, not for obtaining solid tissue cores.
Option C: A punch biopsy tool is a small, cylindrical blade used for obtaining full-thickness skin samples. It is not used for deep organ biopsies as shown.
Option D: A pleural tapping needle is used for thoracentesis, which is the procedure to remove fluid from the space between the lungs and the chest wall.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification and application of diagnostic medical instruments as background academic context rather than a clinical decision trigger.
A nurse's role includes preparing the patient for the biopsy (obtaining consent, explaining the procedure, positioning), assisting the physician during the procedure, and providing post-procedure care.
Post-procedure monitoring is critical and includes observing the biopsy site for bleeding, hematoma, or signs of infection, as well as managing pain.
What if the patient is on anticoagulant medication like warfarin or aspirin? The nurse must ensure this is communicated to the physician, as these medications increase the risk of bleeding and may need to be temporarily stopped before the procedure.

How to Approach the Question

First, carefully examine the instrument in the image. Note its distinct features: a gun-like handle, a long needle, and activation buttons.
Recognize that the handle suggests an automated or semi-automated function, designed for a quick, controlled action.
Consider the purpose of a long, thin needle, which is to access structures deep within the body.
Evaluate the given options in the context of your visual analysis. 'Trucut biopsy needle' is a specific type of needle used for obtaining tissue cores, and the device shown is an automated system for this purpose.
Eliminate the other options by recalling their specific functions: lumbar puncture for CSF, punch biopsy for skin, and pleural tapping for chest fluid. The instrument's appearance does not match these other procedures.

Concept Tested & Keywords

Concept Tested: Identification and application of diagnostic medical instruments.
Stem keywords: instrument, diagnostic procedures
Lead-in keywords: Identify
Negative lead-in flag: false

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 786-788

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