crepitus

Full Definition

Crepitus is a palpable or audible grinding, crackling, or grating sensation that occurs during joint movement or bone palpation. In orthopedic contexts, it typically indicates cartilage damage, bone-on-bone contact in degenerative arthritis, or fracture fragments rubbing together. The term can also describe the tactile sensation of air trapped in subcutaneous tissues (subcutaneous emphysema) or the sound of tendon movement over irregular bone surfaces.

Usage

Usage note: Describes both audible and palpable sensations; distinguish from normal joint sounds.

In Context

• "Examination revealed palpable crepitus over the patellofemoral joint during knee flexion." — Physical examination note
• "The patient reported audible crepitus with shoulder abduction, suggesting rotator cuff pathology." — Clinical assessment