# A 95-kg adult woman is to receive an intramuscular influenza vaccine in the deltoid. Click the needle that matches the recommended adult vaccination gauge and the length recommended for her weight category.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=581201&lang=en  
> language: en  
> subject: Health Promotion and Maintenance  
> category: HPM

## Question

A 95-kg adult woman is to receive an intramuscular influenza vaccine in the deltoid. Click the needle that matches the recommended adult vaccination gauge and the length recommended for her weight category.

![](https://mymerci.kr/data/nclex/hotspot/regen_20260908_2350/HSR538.svg)

## Explanation

C is 1.5 inches long and 23 gauge, meeting both criteria for this client.

## In-depth explanation

Quick answer
C. C is 1.5 inches long and 23 gauge, meeting both criteria for this client.
Why this is the best choice
For a woman weighing more than 90 kg, the CDC recommends a 1.5-inch needle for adult IM vaccination; the gauge range is 22–25. Read the common ruler and the hub label together.
Clinical picture
The observations are fictional teaching data. Apply the stated context; the selected feature does not by itself replace a complete bedside assessment.
Memory hook
Needle length and gauge are separate requirements; satisfying one does not satisfy both.
Decision rule
Needle length and gauge are separate requirements; satisfying one does not satisfy both.
Why the other regions do not fit
A has the appropriate length but is 21 gauge, outside the recommended vaccination range. B is 23 gauge but only 1 inch long. D is 25 gauge but only 5/8 inch long.
**Sources**
- Adult IM vaccine needle selection considers gauge, sex and weight.

## Key concepts

- **Needle length and gauge jointly determine suitability** — Needle length and gauge are separate requirements; satisfying one does not satisfy both.
- **Comparison with context** — A matches length and B matches gauge; only C matches both for this client.

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