National Physical Therapy Examination (NPTE) Practice Exam

What is the most appropriate method to measure wheelchair seat back height?

1. Seat platform to the acromion process and subtract 5 inches

2. Seat platform to the base of the axilla and subtract 4 inches

3. Seat platform to the base of the axilla and subtract 3 inches

4. Seat platform to the superior portion of the axilla and subtract 5 inches

The correct answer is: Seat platform to the base of the axilla and subtract 4 inches

The most appropriate method to measure wheelchair seat back height involves taking the measurement from the seat platform to the base of the axilla and then subtracting 4 inches. This approach is significant because the base of the axilla is a reliable anatomical landmark that accounts for the necessary clearance to ensure proper fit and comfort for the user. Subtracting 4 inches provides adequate height for the backrest, allowing for support while preventing it from being so high that it interferes with arm movement or transfers. This method aims to balance support and mobility, helping to ensure that the user can perform daily activities effectively in their wheelchair. Other methods, while attempting to consider anatomical characteristics, may lead to an improper fit. For example, using the acromion process as a measurement point may not adequately factor in the individual’s shoulder height in relation to seating, potentially resulting in discomfort or restricted movement. Similarly, subtracting different inches (like 3 or 5) from measurements taken at the axilla might either leave the backrest too low for adequate support or too high for comfortable use. Therefore, the chosen approach is well-suited for ensuring proper ergonomic support for wheelchair users.