Rotator Cuff Repair

Rotator Cuff Repair

Causes of Rotator Cuff Injury

  • Trauma: Acute injuries can occur from falls, lifting heavy objects, or accidents, leading to immediate and often severe damage to the rotator cuff.

  • Degenerative Changes: Over time, wear and tear can occur in the rotator cuff, particularly in a hypovascular zone, which is less supplied with blood and therefore more susceptible to injury. Common age-related degenerative changes may involve tendon calcification or tears.

  • Compression: Can occur when the rotator cuff tendsons are pinched between the acromion (the bony prominence on the shoulder blade) and the head of the humerus (the upper arm bone), leading to bursitis, wear, or tears.

Clinical Picture of Rotator Cuff Injury

  • Pain: Typical pain might be felt around the deltoid tuberosity and anterior lateral acromion. This pain may worsen at night or during overhead activities, leading to increased discomfort and fatigue in the affected shoulder.

  • Symptoms: Commonly reported symptoms include a sensation of catching or locking in the shoulder, stiffness, weakness, and a feeling of instability. This can severely affect daily activities, sports, and overall shoulder function.

  • Onset: Rotator cuff injuries may develop gradually with chronic tears presenting as a slow progression of weakness and pain. Acute injuries can cause sudden weakness, often occurring after a prolonged period of discomfort due to chronic issues leading to acute-on-chronic tears.

Surgical Techniques for Repair

  • Open Rotator Cuff Repair:

    • Procedure Details: This traditional approach involves a larger incision and the detachment of the deltoid muscle to access the rotator cuff tendon. After the repair, active deltoid contractions are usually restricted for 6-8 weeks to avoid complications such as avulsion (detachment from the bone).

    • Rehabilitation Constraints: Patients typically have restrictions on active motion until 8-12 weeks post-surgery, with gentle strengthening exercises beginning around the 12 week mark. Full elevation of arms above shoulder level is generally prohibited for a total of 6 months.

  • Mini-Open Procedure:

    • Technique: Utilizing a small (<3 cm) vertical incision, this procedure allows the surgeon to preserve the alignment of deltoid fibers, leading to a gentler initial recovery and permitting mild early deltoid contractions.

    • Advantages: This method reduces surgical morbidity and allows for generally faster rehabilitation compared to the open repair method, making it a preferred choice for many surgeons and patients.

  • Arthroscopic Procedure:

    • Benefits: This minimally invasive approach maintains deltoid attachment ensuring less postoperative pain, shorter recovery time, and decreased surgical risk. Patients can expect to return to functionality sooner relative to traditional techniques.

Rehabilitation Protocol (For Arthroscopic Repair)

  • Immediate Postoperative Phase (0-8 weeks):

    • Healing Process: The healing process begins with fibrovascular tissue forming at the tendon-bone interface, generally completing by around 12 weeks, which is crucial for the stability of the surgical repair.

    • Protective Measures: Abduction pillow braces are often used post-surgery. They reduce strain on the rotator cuff at critical angles (i.e., 45° and 30°) in comparison to lower degrees of abduction (0° and 15°).

    • Goals: Critical objectives during this phase include protecting the surgical repair, increasing passive range of motion (PROM), reducing pain and inflammation, and modifying activities of daily living (ADLs) to avoid strain on the shoulder.

  • Sling and ROM Initiation Table:

    • Partial to Small Tears (<1 cm): Sling for 4 weeks; initiate active motion at 4 weeks.

    • Medium to Large Tears (2-4 cm): Sling for 6 weeks; initiate active motion at 6 weeks.

    • Massive Tears (>5 cm): Sling for 8 weeks; initiate active motion at 8 weeks.

  • Postoperative Care (Weeks 0-8):

    • Therapeutic Techniques: Implementing cold therapy and electrical stimulation (ES) to alleviate postoperative discomfort. Patients may begin limited PROM exercises and pendulum exercises around 4 weeks for larger tears.

    • Active Motion: Patients can start with shoulder flexion exercises (in the scapular plane with the elbow flexed at 90°), while initiating external rotation exercises at a 45° abduction angle.

  • Guidelines and Restrictions:

    • Do’s: Follow directives for sling usage, gradually initiate gentle exercises as tolerated.

    • Don’ts: Avoid horizontal adduction, internal rotation (IR), sudden movements, and placing body weight through the arms. It’s crucial to limit or completely avoid all active range of motion (AROM) immediately post-operation.

  • Phase II: Protection and Protected Active Motion (9-12 weeks):

    • Goals: This phase aims to support healing without overstressing the repair, restoring full PROM, and managing pain/inflammatory responses.

    • Precautions for Phase II: Avoid lifting or putting full body weight on hands/arms, sudden jerking movements, and excessive movements behind the back. Activities that stress the shoulder should be limited.

    • Activity Adjustments: Patients may begin weaning off the brace during the day, initiating assisted active range of motion (AAROM) from a supine position, promoting progressive PROM, and utilizing passive pulleys as tolerated.

  • Strengthening Exercises (From Week 12):Engage in rotator cuff isometrics from multiple angles and begin rhythmic stabilization exercises while ensuring proper alignment to avoid potential humeral displacement. Gentle closed kinetic chain (CKC) exercises like seated press-ups can be included for stability.

  • Phase III: Early Strengthening (13-18 weeks):

    • Goals: Focus on achieving full active range of motion (AROM), maintaining PROM, enhancing dynamic shoulder stability, and preparing for functional activities by restoring strength and endurance to the shoulder muscles.

    • Precautions During Early Strengthening: Avoid lifting over 5 lbs or sudden movements, and begin stretching for internal rotation and shoulder extension while simultaneously engaging in isotonic strengthening exercises using Thera-bands. Continued focus on scapular elevation and rowing exercises is emphasized for this phase.

  • Phase IV: Advanced Strengthening (Weeks 19-24):

    • Goals: Maintain full, non-painful AROM, engage progressively in exercises aimed at functional activities, and sport-specific training to enhance muscular strength, power, and endurance for optimal shoulder function.