AIM:
To increase hip abduction/adduction strength using suspension (for paralysed/ very weak muscles)
Impairment:
Loss of strength
Rationale:
Suspension is used to strengthen paralysed/very weak muscles (by eliminating the effect of gravity in the plane of movement and eliminating friction between the limb and the support surface).
Equipment:
- Adjustable height plinth
- Pillow
- Suspension cage
- Suspension ropes, hooks, slings and plumb line
- Counter
- Targets
Key Points:
- Initial alignment: Patient positioned in supine
- The plumb line is used to locate the centre of the hip joint (not shown in video)
- The slings are placed to support the knee and ankle
- A suspension rope is attached to each sling and fixed on the suspension cage above the centre of the hip joint (axial fixation)
- Position a target either side of leg to act as a cue for range of movement
- Ensure movement is in mid-range
- Ensure limb is well-supported and free to move
- Ensure patient is given a counter to record repetitions
Common Errors:
- Therapist uses a fixation point that is not directly above the centre of the joint resulting in pendular movement
- Therapist positions sling under thigh resulting in knee hyperextension
- Therapist positions sling under calf resulting in ankle plantarflexion
- The limb is not clear of the support surface resulting in increased friction
Progression and Variety:
- Increase amplitude and/or speed of movement
- Add resistance in mid range (using theraband or springs)