Which of the following is a disadvantage of a hybrid prosthesis?

• A. Harness is required for elbow operation
• B. No harness is required
• C. Lightweight design
• D. Easy to operate for a short transhumeral

Answer: (A)

A hybrid prosthesis often combines powered components with a body-powered control system, aiming to give reliable movement with less cable complexity. The main drawback of this setup is the harness required to operate the elbow. The harness, typically worn on the chest or around the shoulder, uses cables to open or lock the elbow. This can make the device bulkier, restrict shoulder and trunk movement, cause skin irritation or discomfort, and complicate donning and doffing. These practical downsides can be a barrier to daily use, especially for longer wear times. The other features listed—not needing a harness, being lightweight, and easy operation for a short transhumeral limb—are advantages that hybrid designs can offer, so they aren’t disadvantages.