Crutches: Understanding Their Purpose and Benefits

Functions of Crutches

Crutches are assistive devices that transfer weight from the lower extremities to the upper body, enabling mobility during lower-limb impairment.

1. Mobility Assistance

Enable walking when one or both legs cannot bear full weight—post-fracture, post-op, amputation, paralysis.

2. Weight-Bearing Control

• Non-weight-bearing (NWB): Zero load on affected limb.
• Touch-down weight-bearing (TDWB): Foot contacts floor for balance only.
• Partial weight-bearing (PWB): Defined percentage (e.g., 50%) allowed.

3. Balance & Stability

Three points of contact (two crutches + one foot) widen base of support, reducing fall risk in weakness, ataxia, or vestibular disorders.

4. Rehabilitation Progression

Facilitate graded return to full weight-bearing: NWB → TDWB → PWB → FWB as healing progresses.

5. Fall Prevention

For elderly or neurologically impaired, crutches (or a walker) provide confidence and reduce falls during recovery or chronic instability.

6. Temporary vs. Long-Term Use

• Temporary: Ankle sprain, tibial fracture, post-arthroscopy (weeks).
• Long-term: Spinal cord injury, cerebral palsy, amputation (may transition to wheelchair).

Proper Fit & Training

• Top of crutch 1–2 inches below axilla; handgrip at wrist crease with elbow ~30° flexion.
• Gait training by PT essential: sequence, stair negotiation, safety.