Identify the following image?

NORCET-7 Mains-2024

Obstetrics & Gynecology

Medium

Appeared in: NORCET-7 Mains-2024

Explanation

The instrument in the image is a Leech-Wilkinson HSG Cannula.
It is identified by its long metallic shaft, a stopcock valve at the proximal end, and a unique conical, threaded (screw-like) tip at the distal end.
The threaded tip is designed to be screwed into the cervical canal to create a secure, leak-proof seal.
The stopcock allows for the controlled injection of contrast media or dye, which is its primary function in procedures like Hysterosalpingography (HSG).

Option A: Hegar dilators are solid, non-cannulated metal rods used for progressive cervical dilation. They lack the hollow channel, stopcock, and threaded tip seen in the image.
Option B: A Yankauer cannula is a suction instrument used to clear secretions from the oropharynx. It has a characteristic bulbous, curved tip with a large opening and is connected to a suction source, which is visually distinct from the instrument shown.
Option D: A supra-pubic cannula is part of a trocar system used for percutaneous bladder drainage. It is designed to puncture the abdominal wall and enter the bladder, and its appearance is very different from the long, slender instrument with a cervical tip shown.

Visual 1: Diagram - An illustration showing the Leech-Wilkinson cannula correctly placed in the cervix during a Hysterosalpingography (HSG) procedure, demonstrating how the threaded tip creates a seal.
Visual 2: Comparison Chart - A chart comparing the images, features, and uses of the Leech-Wilkinson cannula, Hegar dilator, Yankauer suction tip, and a supra-pubic trocar to highlight their differences.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of gynecological surgical instruments as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in preparing patients for procedures involving this instrument, such as HSG. This includes patient education about the procedure, managing anxiety, and assessing for contraindications like iodine allergy.
Post-procedure, nurses monitor for complications such as pain, bleeding, and signs of infection, providing essential care and instructions to the patient.
What if the patient has a known iodine allergy? The nurse must ensure this is communicated to the team. An alternative, non-iodinated contrast medium might be used, or a different diagnostic procedure like saline-infusion sonography (SIS) might be considered.

How to Approach the Question

First, carefully observe the key features of the instrument in the image. Note the long shaft, the mechanism at the handle end, and the shape of the working tip.
Identify the most distinctive features: a stopcock valve (suggesting fluid injection) and a conical, threaded tip (suggesting it needs to be screwed in to form a seal).
Systematically evaluate each option against your visual analysis.
Eliminate 'Hegar dilator' because it's a solid dilator, not a cannula for injection.
Eliminate 'Yankauer cannula' as it's a suction tip with a different shape and purpose.
Eliminate 'Supra-pubic cannula' as it's for bladder access through the abdomen and looks different.

Concept Tested & Keywords

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