Shoulder Capsular Release (Frozen Shoulder)

Why this approach — at MOS

The most important nuance in frozen shoulder surgery is the immediate post-operative therapy protocol. The gains achieved in the operating room can be lost within days if aggressive early motion is not pursued. We have our physical therapists see capsular release patients for the first session on post-operative day 1 — while the nerve block is providing analgesia — to begin motion exercises immediately and establish the starting range of motion baseline that guides subsequent sessions.

We use a systematic capsular release sequence: rotator interval, anterior capsule, inferior capsule and axillary recess, posterior capsule as needed. The extent of release is determined intraoperatively based on what is restricting motion. We do not routinely release the posterior capsule unless there is documented limitation in internal rotation and external rotation that is not adequately resolved by anterior and inferior release.

The nerve block's extended duration (12–18 hours) provides a critical window of pain-free motion in the first 24 hours — the single most important period for establishing early range of motion. We counsel patients extensively before surgery on the importance of starting motion exercises within the first 24 hours.

Who is a candidate?

Indications

• Adhesive capsulitis (frozen shoulder) with significant loss of active and passive range of motion that has failed conservative management
• Failure of physical therapy, suprascapular nerve block, and corticosteroid injection over 6–12 months
• Patients who cannot tolerate or access the prolonged conservative management required for spontaneous resolution
• Secondary adhesive capsulitis after rotator cuff repair or other shoulder surgery with persistent profound stiffness

Contraindications

• Early-stage adhesive capsulitis (freezing phase, less than 3–6 months) — conservative treatment should be the first approach
• Active shoulder infection
• Significant concurrent glenohumeral arthritis (stiffness from arthritis responds differently than adhesive capsulitis)
• Patient who has not adequately attempted supervised physical therapy and injection treatment

Conservative Treatment First

The vast majority of adhesive capsulitis cases are managed without surgery, and this should always be the first approach. The foundation of conservative treatment is:

Physical therapy, specifically stretching — pendulums, cross-body stretch, towel-assisted posterior capsule stretch, supine passive elevation — to maintain and recover motion. Therapy is most effective when begun during the freezing phase. A corticosteroid injection into the glenohumeral joint early in the disease process (within 6 months of onset) is well supported by evidence and can accelerate resolution of both pain and stiffness.

Hydrodilation — injecting a large volume of saline, corticosteroid, and local anesthetic into the joint to distend and stretch the capsule — is another non-surgical option with evidence supporting benefit. Suprascapular nerve block provides pain relief that allows more effective therapy.

Surgery is considered after 6–12 months of comprehensive conservative management without adequate improvement, particularly when functional limitations severely affect quality of life. Diabetic patients — who are the most treatment-resistant — and patients in the Bethesda and Montgomery County area with demanding occupational needs are most likely to benefit from earlier surgical consultation to establish realistic timelines.

The procedure

What Is Shoulder Capsular Release?

Shoulder capsular release is an arthroscopic procedure that cuts through the thickened, contracted joint capsule causing frozen shoulder (adhesive capsulitis). It restores range of motion when physical therapy and injections have failed to break through the stiffness. The procedure takes 30–45 minutes and is performed outpatient.

Frozen shoulder — formally called adhesive capsulitis — is a condition in which the soft-tissue capsule surrounding the glenohumeral joint becomes inflamed, thickened, and progressively contracted. The joint capsule is normally a loose, flexible sleeve that allows the shoulder to move through its remarkable range of motion. In adhesive capsulitis, this capsule shrinks and becomes stiff, tethering the shoulder and making even simple movements — reaching overhead, reaching behind the back, combing hair, putting on a jacket — painfully limited or impossible.

The condition follows a well-described natural history with three phases: the "freezing" phase (increasing pain and stiffness over 6–12 months), the "frozen" phase (maximal stiffness with reduced but stable pain, 4–12 months), and the "thawing" phase (gradual spontaneous recovery, 6–24 months). The total natural history without treatment can span 2–4 years, and some patients never fully recover.

Frozen shoulder affects middle-aged adults — most commonly those aged 40–60 — with a higher prevalence in women and a well-documented association with diabetes (diabetic patients have both higher incidence and more prolonged, treatment-resistant cases). It can occur after shoulder injury or surgery (secondary adhesive capsulitis) or without apparent cause (primary or idiopathic).

Arthroscopic capsular release works by systematically dividing the thickened capsule — anterior, posterior, and inferior — under direct vision. This immediately restores the joint volume and range of motion that the contracted capsule was preventing. The procedure eliminates the structural barrier to motion; the nerve block placed before surgery allows immediate manipulation under anesthesia to confirm and maximize the motion gains while the patient is still asleep.

What Happens During Shoulder Capsular Release?

You arrive at the ambulatory surgery center approximately 90 minutes before surgery. An interscalene nerve block is placed by the anesthesiologist. The nerve block serves double duty here: it provides post-operative pain relief, and — critically — it allows the surgeon to perform a manipulation under anesthesia (MUA) immediately after the capsular release while the shoulder is fully relaxed, maximizing the range of motion gains before the patient wakes up.

General anesthesia is administered. You are positioned in the beach chair or lateral decubitus position.

The arthroscope is inserted through a posterior portal. The glenohumeral joint is inspected for any additional pathology. The thickened, contracted capsule is identified — typically the rotator interval (anterior capsule between the supraspinatus and subscapularis), the inferior capsule, the axillary recess, and the posterior capsule are all contracted to varying degrees.

A radiofrequency ablation device or electrocautery instrument is used to systematically divide the capsule. The release begins in the rotator interval — the safest initial location — and proceeds inferiorly into the axillary recess, then posteriorly as needed. The axillary nerve runs immediately inferior to the axillary pouch and must be protected throughout the inferior release — its anatomic position is kept in mind at every step.

After arthroscopic release, the shoulder is manipulated gently under anesthesia to confirm restoration of range of motion and break any remaining adhesions. The range achieved on the table is documented as the target for post-operative physical therapy.

Portals are closed and the arm is placed in a sling with the nerve block still active.

Recovery timeline

Frequently Asked Questions