NHA Certified Clinical Medical Assistant (CCMA)Clinical Patient CareMedium
A medical assistant is preparing a patient for an electrocardiogram (ECG). The patient has excessive chest hair. Which of the following actions should the MA take?
- AShave the areas where electrodes will be placed.
- BPlace the electrodes directly over the hair.
- CApply extra gel to the electrodes.
- DUse larger electrodes to improve contact.
Show answer & explanationAnswer & explanation
Correct answer: A. Shave the areas where electrodes will be placed.
Excessive hair interferes with proper electrode adhesion and electrical signal transmission, leading to artifact. Shaving the areas ensures good skin contact for accurate ECG readings.
Why the other options are wrong
- B. Placing electrodes directly over hair will prevent proper skin contact, leading to poor signal quality and artifact on the ECG.
- C. Extra gel can sometimes help but is often insufficient for excessive hair and can lead to electrode slippage or bridging, causing artifact.
- D. Larger electrodes do not overcome the barrier of excessive hair and may still result in poor contact and artifact.
ECG Electrode Placement Prep
Proper skin preparation, including hair removal, is essential before ECG electrode placement to ensure good electrical conductivity and prevent artifact.
- Clean skin with alcohol.
- Abrade skin lightly to remove dead cells.
- Shave or clip excessive hair.
- Ensure electrodes adhere firmly.
Memory trick: Smooth Skin, Strong Signal