Shoulder subluxation in stroke is a common and potentially serious complication seen in patients with hemiplegia. It typically occurs in the early stages after stroke and, if not managed properly, can lead to pain, reduced upper limb function, and delayed rehabilitation progress.
For physiotherapists, understanding the mechanisms, prevention strategies, and management techniques for shoulder subluxation is essential for safe neuro rehabilitation practice.
What is Shoulder Subluxation in Stroke?
Shoulder subluxation refers to a partial separation of the humeral head from the glenoid fossa. In stroke patients, it usually affects the hemiplegic side due to:
- Muscle weakness
- Flaccidity in early stages
- Loss of scapular stability
- Impaired motor control
- Poor positioning
Without adequate muscular support, gravity pulls the arm downward, leading to inferior subluxation.
Why Shoulder Subluxation Occurs After Stroke?
The shoulder joint relies heavily on muscular support rather than bony stability. In acute stroke:
- The rotator cuff muscles lose activation
- Deltoid muscle weakness reduces humeral head support
- Scapular stabilizers become inactive
- Tone may initially be flaccid
This combination increases the risk of shoulder subluxation in stroke patients.
Clinical Signs of Shoulder Subluxation
Physiotherapists should assess for:
- Visible gap between acromion and humeral head
- Palpable space under acromion
- Downward displacement of arm
- Arm heaviness
- Reduced active movement
- Early signs of shoulder pain
Early identification is critical for prevention.
Prevention of Shoulder Subluxation in Stroke
Prevention begins from day one of rehabilitation.
1. Proper Positioning
Correct positioning in bed and sitting is essential:
- Support the affected arm with pillows
- Avoid arm hanging unsupported
- Maintain scapular alignment
- Encourage midline posture
Side-lying on the affected side (when appropriate) can promote joint approximation.
2. Safe Patient Handling
Improper handling is one of the biggest causes of worsening subluxation.
Avoid:
- Pulling the affected arm during transfers
- Lifting patient by affected limb
- Allowing arm to dangle during mobility
Always support the shoulder during transfers and mobility training.
3. Early Muscle Activation
Gentle facilitation of:
- Deltoid
- Supraspinatus
- Scapular stabilizers
Helps maintain joint integrity and reduce inferior displacement.
4. Use of Support Devices (When Needed)
Depending on clinical judgement:
- Arm slings (temporary use)
- Shoulder supports
- Taping techniques
These should not replace active rehabilitation but may assist in early stages.
Management of Established Shoulder Subluxation
If subluxation has already developed, management includes:
1. Pain Control
- Gentle handling
- Avoid aggressive range
- Positioning education
- Electrotherapy if indicated
2. Facilitation Techniques
Encourage active shoulder control through:
- Assisted range exercises
- Weight-bearing activities
- Closed-chain exercises
- Functional reaching tasks
3. Trunk and Scapular Stability Training
Improving trunk control directly impacts shoulder stability.
Focus on:
- Sitting balance
- Core activation
- Scapular mobilization
The Role of Caregiver Education
Caregivers must be trained in:
- Safe transfer techniques
- Correct arm positioning
- Avoiding traction forces
- Supporting the arm during walking
Caregiver mistakes can worsen shoulder subluxation significantly.
Common Clinical Mistakes
- Ignoring early flaccidity
- Using sling continuously without rehab
- Passive overhead movements without scapular control
- Not educating family
- Poor wheelchair arm support
Avoiding these mistakes improves outcomes.
Conclusion
Shoulder subluxation in stroke is preventable in many cases with early intervention, proper positioning, safe handling, and structured rehabilitation.
For physiotherapists, mastering prevention strategies is more important than managing complications later.
Safe handling, early muscle activation, and caregiver education form the foundation of effective shoulder management in stroke rehabilitation.