Inpatient (Early In-Hospital) Phase — Capsular Release ± Subacromial Decompression

Topic scope: the early in-hospital phase of rehabilitation for patients who have just had an arthroscopic capsular release (for a stiff/frozen shoulder) and/or an arthroscopic subacromial decompression (acromioplasty). This page covers only the first day or two after surgery — getting the shoulder moving before the patient goes home. The full recovery course lives in the parent protocols: capsular release and subacromial decompression. Read those for the week-by-week plan, strengthening and return to work/sport.

Defining principle of this pathway (the inversion): unlike most shoulder operations — where a repair (cuff, labrum, instability) must be protected in a sling and range of motion is restricted to let the tissue heal — capsular release does the opposite. Nothing has been repaired, so there is no construct to protect. The shoulder was deliberately freed up in theatre, and the enemy now is re-stiffening. The in-hospital priority is therefore immediate, aggressive range of motion from day 0–1, usually with no protective sling (or a sling only for comfort, discarded quickly), to hold on to the range gained at surgery. A subacromial decompression is also a "make room / take pressure off" operation with no repair, so it follows the same early-movement logic. The single thing that changes this is if the surgeon also had to repair a rotator cuff tear at the same time — then the slower, protected cuff-repair pathway applies and the surgeon will say so.

The early in-hospital phase

The aim of the first day or two is simple: keep the shoulder moving and keep the patient comfortable enough to do so. In hospital, patients are started on gentle hand, wrist and elbow movements, pendulum (Codman) swings, and assisted elevation and external rotation — exactly the gentle exercises listed on the patient page. Adequate pain relief is the practical key, because a comfortable patient will move the arm, and a moving arm does not re-stiffen.

For capsular release in particular, surgeons commonly inject an intra-articular corticosteroid and perform a gentle controlled manipulation at the end of the operation to confirm the gained range and to damp down the post-operative inflammation that drives re-contracture [Smith 2017, PMC5137660]. The early motion exercises then begin straight away — often the same day or the first day after surgery.

Evidence by theme

Immediate-motion capsular-release protocols

Published arthroscopic capsular release (ACR) series describe starting motion immediately, not after a protected period. The largest cohort (Kanbe 2018, n = 255) commenced "passive, assisted-active and stooping (pendulum) exercises for forward flexion and external rotation 1 day after surgery," progressing to active strengthening at ~2 weeks and return to work by 4–6 weeks [Kanbe 2018]. Surgical-technique reviews echo this: active-assisted and passive range-of-motion exercises — pendulum/circumduction and pulley work — "can be started on the first postoperative day," and patients perceive the improvement in motion immediately, which reinforces their commitment to moving the arm [Essential Surgical Technique, PMC6221416]. Several ACR series pair the release with an intra-articular steroid + controlled manipulation at the index procedure to limit re-stiffening [Smith 2017, PMC5137660]. Evidence: large cohorts + expert/consensus.

Subacromial decompression — early motion, sling for comfort only

Arthroscopic subacromial decompression (acromioplasty) likewise has no repair to protect. Patient-guidance protocols start physiotherapy immediately after surgery, with a sling worn only 1–2 weeks for comfort and early active range of motion (forward elevation below shoulder height, gentle rotation) from the outset; strengthening follows at 4–6 weeks and unrestricted activity by 6–12 weeks [Boston Shoulder Institute SAD protocol; London Shoulder Partnership]. The important caveat, stated in every protocol, is that a concomitant rotator cuff repair (or biceps/SLAP repair) converts the recovery to the slower, protected pathway [PMC6145625].

Why immediate motion (and not protection)

A small number of patients develop stiffness after even simple arthroscopic shoulder procedures, which is the failure mode early movement is designed to prevent [Frozen shoulder after simple arthroscopic procedures, 10.1302/0301-620x.97b7.35387]. Conversely, the corpus also flags chondrolysis after shoulder arthroscopy as a rare but serious complication — a reminder that "aggressive" here means aggressive motion, on a comfortable, well-analgesed patient, not aggressive intra-articular intervention [10.1177/0363546503262176].

Phased timeline — early phase only

Branch point — if a rotator cuff repair was also performed: the recovery converts to the protected rotator-cuff-repair pathway (sling ~6 weeks, restricted motion, delayed strengthening). The surgeon confirms which pathway applies before discharge — this is a surgeon-decided point, not a default.

Key controversies / evidence quality

1. The post-operative rehab protocol is consensus/expert, not RCT-derived. There is no high-level trial defining the optimal regimen after capsular release; published protocols are large cohorts and surgeon patient-guidance documents and vary in detail [Kanbe 2018; Willmore 2020 review]. What is consistent across them all is the immediate-motion, no-protective-sling principle.
2. Sling: comfort only vs none. Protocols differ on whether to use a comfort sling at all and for how long (days to ~2 weeks for decompression). All agree it must be left off as much as possible and is never a protective device here.
3. Steroid + manipulation at the index procedure. Common in ACR to limit re-stiffening, but the exact regimen (dose, whether to manipulate) is surgeon preference, not standardised by trial.

Evidence-strength flags

• MODERATE (large cohorts): clinical outcomes of arthroscopic capsular release with day-1 motion (Kanbe 2018, n = 255); subacromial decompression outcomes.
• WEAK / CONSENSUS: the early-phase rehab protocol itself — immediate motion, sling-for-comfort rules, intra-articular steroid + manipulation timing (surgeon patient-guidance and expert review; no defining rehab RCT).
• Branch-point claim (cuff repair → protected pathway): STRONG rationale and uniformly stated across protocols.

Citations

RAG corpus (180,000+ Orthopaedic articles)

• Arthroscopic capsular release for refractory shoulder stiffness: a critical analysis of effectiveness in specific etiologies. J Shoulder Elbow Surg. DOI: 10.1016/j.jse.2009.08.004
• Arthroscopic release of postoperative capsular contracture of the shoulder. J Bone Joint Surg Am. 1997. DOI: 10.2106/00004623-199708000-00006
• Arthroscopic release for chronic, refractory adhesive capsulitis of the shoulder. J Bone Joint Surg Am. 1996. DOI: 10.2106/00004623-199612000-00003
• Clinical outcome of arthroscopic capsular release for frozen shoulder: essential technical points in 255 patients (Kanbe 2018; day-1 ROM, 4–6 wk return to work). J Orthop Surg Res. 2018. DOI: 10.1186/s13018-018-0758-5
• Establishing the MCID and PASS thresholds following arthroscopic capsular release for idiopathic adhesive capsulitis. Arthroscopy. 2023. DOI: 10.1016/j.arthro.2023.08.083
• Frozen shoulder after simple arthroscopic shoulder procedures. Bone Joint J. 2015. DOI: 10.1302/0301-620x.97b7.35387
• Glenohumeral chondrolysis after shoulder arthroscopy (rare serious complication; "aggressive" = motion, not intra-articular intervention). Am J Sports Med. 2004. DOI: 10.1177/0363546503262176
• Effect of capsular release in the treatment of shoulder stiffness concomitant with rotator cuff repair. Am J Sports Med. 2014. DOI: 10.1177/0363546513519326

Literature & published protocols (URLs)

• Kanbe K. Clinical outcome of arthroscopic capsular release for frozen shoulder (day-1 ROM protocol). PMC: https://pmc.ncbi.nlm.nih.gov/articles/PMC5857121/
• Smith CD et al. Arthroscopic capsular release for idiopathic frozen shoulder with intra-articular injection and controlled manipulation. PMC5137660: https://pmc.ncbi.nlm.nih.gov/articles/PMC5137660/
• Essential surgical technique for arthroscopic capsular release (active-assisted/passive ROM from first post-op day). PMC6221416: https://pmc.ncbi.nlm.nih.gov/articles/PMC6221416/
• Arthroscopic subacromial decompression and acromioplasty — rehabilitation and concomitant-repair caveat. PMC6145625: https://pmc.ncbi.nlm.nih.gov/articles/PMC6145625/
• Boston Shoulder Institute — Post-operative arthroscopic subacromial decompression protocol (sling 1–2 wk for comfort, immediate physio): https://bostonshoulderinstitute.com/wp-content/uploads/2014/07/Shoulder-Subacromial-Decompression-protocol2.pdf
• The London Shoulder Partnership — Subacromial decompression (acromioplasty): http://thelondonshoulderpartnership.co.uk/shoulder/shoulder-surgery/subacromial-decompression-acromioplasty/
• J Paget NHS — Patient information: arthroscopic capsular release following a frozen shoulder (sling for comfort, early movement): https://www.jpaget.nhs.uk/media/efmf3bab/arthroscopic-capsular-release-following-a-frozen-shoulder.pdf