Which of the following syringe is used for BCG vaccination?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2019

Fundamental of Nursing

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2019

Explanation

BCG vaccination requires administering a very small and precise dose (0.05 mL to 0.1 mL) of vaccine.
The route of administration is intradermal, meaning the injection is given into the top layer of the skin.
A Tuberculin syringe has a small capacity (1 mL) and is finely calibrated in 0.01 mL increments, making it the ideal instrument for accurately measuring and delivering such small volumes.
The World Health Organization (WHO) specifically recommends a Tuberculin syringe for BCG administration to ensure precision and prevent complications.

Option A: A 2 cc (2 mL) syringe is too large and lacks the fine calibration needed to accurately measure the 0.05 mL or 0.1 mL BCG dose. It is typically used for intramuscular or subcutaneous injections of larger volumes.
Option B: A 5 cc (5 mL) syringe is a large-volume syringe used for tasks like administering IV medications or irrigating wounds. It is completely unsuitable for the precise, small-dose BCG injection.
Option D: A 10 cc (10 mL) syringe is even larger and used for flushing IV lines, irrigating, or administering large-volume medications. It offers no precision for the micro-dosage of the BCG vaccine.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Equipment for Vaccine Administration as background academic context rather than a clinical decision trigger.
Using the correct syringe is a critical patient safety measure. Dose accuracy is paramount for vaccines to ensure immunogenicity (effectiveness) and prevent adverse reactions.
Injecting the correct dose intradermally creates a characteristic wheal (a small, raised bleb), which is a visual confirmation of a successful injection. An incorrect dose or technique can lead to a subcutaneous abscess or lack of immune response.
What if a 2 cc syringe was used by mistake? It would be extremely difficult to measure 0.05 mL accurately. This could lead to a significant underdose (rendering the vaccine ineffective) or overdose (increasing the risk of severe local reactions like large ulcers or suppurative lymphadenitis).

How to Approach the Question

First, identify the core of the question: it asks for the specific equipment for BCG vaccination.
Recall the key characteristics of BCG administration: it's an intradermal (ID) injection, and the dose is very small (0.05-0.1 mL).
Consider the function of each option. A syringe's primary function is to measure and deliver a specific volume of fluid.
Evaluate which syringe is designed for small, precise measurements. Syringes with larger capacities (2, 5, 10 cc) have larger, less precise markings.
Recognize that the Tuberculin syringe is specifically designed with a 1 mL capacity and 0.01 mL gradations for administering tiny, precise doses, making it the correct choice for ID injections like BCG.

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