Overview
Shoulder arthroscopy is keyhole surgery of the shoulder: a 4 mm camera and thin instruments passed through portals about 5 mm wide. Here it means the operation for persistent impingement and bursitis, subacromial decompression. The thickened bursa that sits between the rotator cuff and the acromion is removed, frayed tissue is trimmed, and a few millimeters of bone are shaved from the underside of the acromion so the cuff tendons can glide without being pinched. Because nothing is repaired, recovery is the fastest of any shoulder operation Dr. O'Donnell performs.
The expected result is relief of the painful arc with overhead reaching and of the night pain that comes with it, with most patients back to full work and sport by 8 to 12 weeks. It is performed as an outpatient procedure at Bayside Surgery Center in Coconut Grove.
Who It's For
Decompression is offered when impingement or bursitis has not settled after at least three months of a proper program: activity modification, a therapy course directed at the rotator cuff and shoulder blade, and an ultrasound-guided corticosteroid injection. A good candidate has a painful arc between about 60° and 120° of elevation, a positive Neer or Hawkins test, temporary but clear relief from the injection, an intact cuff on MRI, and often a hooked (type III) acromion on X-ray. Partial-thickness cuff fraying involving less than half the tendon depth is debrided at the same time rather than repaired.
The operation does not help every painful shoulder. Pain from a full-thickness tear with weakness on exam is generally treated with a rotator cuff repair rather than a decompression alone (see rotator cuff tear). A stiff shoulder with lost passive motion is usually frozen shoulder, which is made worse rather than better by acromioplasty. Pain and loss of motion with joint-space narrowing on X-ray is arthritis. A patient who has never tried therapy is asked to do so first.
Bursal thickening or a hooked acromion on imaging is not by itself a reason for decompression; both are common in shoulders that do not hurt. Dr. O'Donnell offers the operation only when the painful arc and Neer and Hawkins tests, the injection response and the imaging point to the same problem, and at least three months of therapy have failed. See impingement and bursitis and rotator cuff tears.
What the Procedure Involves
Surgery takes place under an interscalene nerve block and general anesthesia. Dr. O'Donnell first examines the joint itself through a posterior portal, checking the labrum, biceps anchor, cartilage and the joint side of the rotator cuff. Findings not visible on MRI are treated at this stage, such as a frayed biceps or a labral flap.
The arthroscope is then moved into the subacromial space. The bursa is removed with a shaver, which alone gives a large share of the pain relief. The coracoacromial ligament is released from the front edge of the acromion and a burr removes the hook on its undersurface, converting it to a flat type I shape. The cuff is inspected from above and any partial-thickness fraying is smoothed. The outer end of the clavicle is trimmed only when the AC joint was tender before surgery and arthritic on imaging, because it adds to the recovery.
The operation takes 30 to 45 minutes. The portals are closed with a single stitch each, a sling is fitted for comfort, and patients go home the same day.
Risks & How They Are Minimized
The biggest risk of this operation is that it is done for the wrong diagnosis, which is why Dr. O'Donnell insists on a positive response to the injection and an MRI showing an intact cuff before offering it. Stiffness is the most common complication and is avoided by starting motion in the first days: the sling is off within a week and full active motion is the goal by week four. Persistent pain from an unrecognized biceps or labral problem is prevented by inspecting the joint before the subacromial space.
Infection is rare with 5 mm portals; a single dose of antibiotic is given before surgery and the dressings stay dry for 48 hours. Removing too much acromion can weaken the deltoid attachment, so bone resection is limited to the hook itself. Numbness from the nerve block resolves within a day, and permanent nerve injury is very rare. Blood clots are uncommon after shoulder arthroscopy because patients walk the same day; aspirin is used for two weeks in those with risk factors.
Recovery & Rehabilitation
Because no tendon or labrum has been repaired, rehabilitation is accelerated and there are no tissue-protection restrictions. Dr. O'Donnell's protocol moves on criteria rather than dates.
| Phase | Timing | What happens |
|---|---|---|
| Phase I | Weeks 0–2 | Sling weaned within the first several days. Pendulums, passive and active-assisted flexion and external rotation, scapular setting, ice 20 minutes several times daily. No heavy lifting or forceful overhead activity. |
| Phase II | Weeks 2–4 | Full active motion in all planes, sub-maximal rotator cuff isometrics, scapular rows and retraction, posterior capsule stretching as needed. Avoid painful end-range loading. |
| Phase III | Weeks 4–8 | Resistance-band external and internal rotation and scaption, periscapular strengthening (rows, serratus punches, lower trapezius), closed-chain stabilization and proprioception. Advance at 80% of the strength of the other side. |
| Phase IV | Weeks 8–12 | Advanced strengthening and plyometrics, sport- or job-specific progression, interval throwing or serving program for overhead athletes. Full return once motion is painless and strength symmetric. |
Desk work is usually possible within two to three days, driving at about one week once the sling is off, and swimming, tennis, golf and manual work between 8 and 12 weeks.
Protocol summary
The sling is for comfort only and is discontinued within the first week. Activity is advanced as pain and swelling allow; there are no restrictions to protect healing tissue, but heavy lifting and forceful overhead work are avoided in the first two weeks and painful end-range loading through week four. Soreness with new activity is expected; sharp or increasing pain means the activity should be reduced.
The criteria to progress are controlled pain and near-full passive motion by two weeks, full pain-free active motion with normal scapular mechanics by four weeks, and 80% of the opposite side's strength by eight weeks. Full work and sport follow sport-specific testing between 8 and 12 weeks.
Physical Therapy Protocol
Shoulder Arthroscopy — Debridement & Subacromial PDF ↗Frequently Asked Questions
How long does recovery from shoulder arthroscopy take?
For a decompression with no repair, most patients are out of the sling within a week, have full motion by about four weeks, and are back to full activity including overhead sport between 8 and 12 weeks. If a rotator cuff or labral repair was performed at the same time, the timeline of that repair applies instead.
Is subacromial decompression worth it, or will therapy work just as well?
For most people with impingement, therapy and an ultrasound-guided injection work, which is why Dr. O'Donnell asks for at least three months of that program first. Surgery is for the minority whose painful arc persists despite it, whose injection gave clear but temporary relief, and whose MRI shows an intact cuff. In that group decompression gives reliable relief.
When can I drive and return to work after shoulder arthroscopy?
Driving usually within about a week, once the sling is off, you can move the arm comfortably and you are no longer taking prescription pain medication; never within 24 hours of anesthesia. Desk work within two to three days. Jobs with lifting or repeated overhead work usually need four to eight weeks, and heavy manual work is cleared once strength reaches about 80% of the other side.
What are the incisions like, and when can I shower?
There are three or four portals about 5 mm each, closed with a single stitch. You may shower after 48 hours, washing them gently and re-covering with a dry dressing. Avoid baths, pools and hot tubs for at least three weeks and keep direct sun off the incisions while they heal.
Will the bone spur come back?
No. The acromial hook is bone shape, not a growth, and once flattened it does not re-form. Symptoms can return if the rotator cuff and scapular muscles are allowed to weaken again, which is why the strengthening phase of the protocol matters as much as the operation.
This page is for general education and is not a substitute for a medical evaluation. The right procedure depends on your individual diagnosis, anatomy, and goals. Kevin O'Donnell, MD sees patients from Coral Gables, Miami, Brickell, Pinecrest and Coconut Grove at 475 Biltmore Way, and out-of-town patients by telemedicine.