Identify the blade used:

Appeared in: AIIMS Delhi NO- 2019

Explanation

The image displays a surgical blade with a distinct elongated triangular shape and a sharp, pointed tip.
This specific morphology is characteristic of a No. 11 surgical blade.
The design of the No. 11 blade is optimized for making precise stab incisions, draining abscesses, or creating openings for laparoscopic trocars.

Option B: A No. 15 blade has a small, curved cutting edge, which is different from the long, straight, pointed blade shown in the image.
Option C: A No. 21 blade is a large, leaf-shaped blade with a curved cutting edge, used for large skin incisions. It does not have the triangular, pointed shape seen in the image.
Option D: A No. 22 blade is also a large, leaf-shaped blade, even larger than the No. 21, designed for making extensive incisions in thick tissue. Its shape is completely different from the pointed, triangular blade in the image.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of surgical instruments as background academic context rather than a clinical decision trigger.
For nurses in the operating room (perioperative nurses), correctly identifying surgical instruments like scalpel blades is a fundamental and critical skill. Handing the surgeon the wrong blade can interrupt the flow of the surgery and potentially lead to an incorrect or unsafe incision.
Knowledge of instrument types is essential for preparing the surgical trolley, anticipating the surgeon's needs, and ensuring patient safety.
What if? If a nurse were to hand the surgeon a No. 22 blade when a No. 11 was requested for an abscess drainage, the surgeon would be unable to make the small, precise stab incision needed. This would cause a delay and require the nurse to provide the correct instrument, highlighting the importance of accurate instrument identification.

How to Approach the Question

This is an image-based identification question requiring recall of specific knowledge.
First, carefully observe the key features of the object in the image. Note the blade's overall shape (triangular), its tip (sharply pointed), and its cutting edge (straight).
Next, access your knowledge of common surgical instruments, specifically the numbering system for scalpel blades.
Compare the visual characteristics of the blade in the image to the known shapes of the blades listed in the options (11, 15, 21, 22).
The distinct triangular shape and pointed tip are the defining features of a No. 11 blade, allowing you to select the correct option.

Concept Tested & Keywords

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E6 Gynecology Williams p. 429-435

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