Measuring Height
Step-by-step guide to the CNA measuring height clinical skill. See exactly what the examiner is checking, the common mistakes students make, and how to pass on the first try.
1Step-by-Step Procedure
- 1
Gather equipment: upright scale with height rod, or wall-mounted height gauge, and paper towel.
- 2
Wash hands.
- 3
Identify the resident and explain the procedure.
- 4
Raise the height rod above the estimated height of the resident.
- 5
Ask the resident to remove shoes and any hair accessories that add height.
- 6
Place a paper towel on the scale platform or floor position.
- 7
Assist the resident to step onto the platform and stand with their back toward the measuring rod.
- 8
Instruct the resident to stand straight with heels together, head upright, eyes looking forward (Frankfort horizontal plane).
- 9
Gently lower the height rod until it rests flat on the top of the resident's head.
- 10
Read the measurement at eye level on the scale.
- 11
Assist the resident safely off the platform.
- 12
Remove the paper towel and discard.
- 13
Record the height accurately, noting units (inches, feet/inches, or centimeters).
- 14
Wash hands and document.
What the Examiner Is Watching For
- ✓
Resident removes shoes before measurement.
- ✓
Resident stands straight with heels together and head in neutral position.
- ✓
Height rod rests flat on top of the head, not tilted.
- ✓
Reading is taken at eye level.
- ✓
Measurement is accurately recorded with correct units.
Common Mistakes That Cause Failure
- ⚠
Allowing the resident to keep shoes on — this inflates the measurement.
- ⚠
Reading the scale from an angle, causing parallax error.
- ⚠
Not ensuring the resident stands straight; slouching gives falsely short measurements.
- ⚠
Allowing the height rod to tilt rather than rest flat on the head.
- ⚠
Forgetting to record the measurement immediately.
Tips for Exam Day
- →
Always remove shoes before measuring.
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Get down to eye level with the measuring mark to read it accurately.
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Ensure the resident stands fully upright — a gentle verbal reminder is usually enough.
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Height measurement is often paired with weight on the same visit.
Equipment Used in This Skill
Familiarize yourself with what you'll handle on exam day.
Portable Stadiometer
The height rod used in most clinical skills evaluations.
Medical Measuring Tape
Some facilities use a flexible tape — good to know both methods.
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Also prep for the written exam
The written NNAAP exam tests the same knowledge behind these clinical skills — use the study guides to reinforce the concepts in multiple-choice format.
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