NHA Certified Clinical Medical Assistant (CCMA)Clinical Patient CareMedium
A medical assistant is preparing to perform a blood pressure measurement on an adult patient. The patient has a cast on their right arm and an intravenous (IV) line infusing in their left antecubital fossa. Which of the following sites should the medical assistant use to obtain an accurate blood pressure reading?
- ALeft wrist
- BRight antecubital fossa
- CLeft antecubital fossa
- DRight thigh
Show answer & explanationAnswer & explanation
Correct answer: D. Right thigh
When the upper extremities are compromised, the thigh is an appropriate alternative site for blood pressure measurement. The cuff size must be adjusted to fit the thigh.
Why the other options are wrong
- A. The wrist can be used but is generally less accurate than the upper arm or thigh and requires a specific wrist cuff.
- B. This arm has a cast, which can interfere with accurate readings and cause discomfort.
- C. An IV line in this arm makes it unsuitable for blood pressure measurement due to potential occlusion of blood flow and patient discomfort.
Alternative BP Sites
When standard upper arm sites are unavailable or contraindicated for blood pressure measurement, alternative sites like the thigh or forearm/wrist can be used.
- Thigh is a common alternative site.
- Cuff size must be appropriate for the chosen site.
- Avoid sites with injury, IVs, or compromised circulation.
Memory trick: No Arm, No Problem: Check the Thigh!