Subacromial Decompression Info Consent
Reviewed by Dr Kieran Hirpara, Specialist Orthopaedic Surgeon Last reviewed
Why this operation has been suggested
This page reflects how Dr Kieran Hirpara, an upper-limb surgeon at Mater Private Hospital Rockhampton, approaches this in our clinic. We usually suggest subacromial decompression, also called shoulder impingement surgery, when you have mechanical pinching in the shoulder and pain has not improved after non-surgical care. You reach our clinic by GP or physiotherapist referral. A clinic assessment establishes the diagnosis. For long-standing problems we try activity change, physiotherapy, splinting, and injections first. We consider surgery when that has not given enough improvement.
We offer this procedure if you have had pain for at least 6 months, a specific physical exam test is positive, and scans show mechanical impingement. Arthroscopic subacromial decompression is a valid treatment that reduces pain and improves quality of life for patients selected for surgery according to the Danish national guidelines. Our surgeon uses an arthroscopic approach with two or three small incisions and a small camera inside the joint. This aims to relieve the pressure on your shoulder tissues.
Before the operation
You must fast for six hours before your anaesthetic. Please stop taking blood-thinning medications as your surgeon will advise. Arrange for someone to drive you home after the procedure. Bring a complete list of your current medications and wear comfortable, loose-fitting clothing. You may need preoperative investigations such as X-rays, an MRI scan, or blood tests to confirm the diagnosis and check your fitness for surgery. An anaesthetic review may also be required to discuss pain management options. These steps help ensure your surgery proceeds safely and effectively.
On the day
You will arrive at the hospital for admission. Our team will guide you through the check-in process. This operation is done under general anaesthetic combined with a regional nerve block. You will be fully asleep for the operation, and the block — an injection that numbs the nerves supplying the arm before you wake up — provides pain relief for the first 12 to 24 hours after surgery. The anaesthetist will meet you before the operation and talk you through both parts.
You will then be taken to the operating theatre. Our surgeon performs this procedure using an arthroscopic approach. This means we make two or three small incisions. We insert a tiny camera and special tools through these small openings to treat the shoulder. The procedure is minimally invasive. After the surgery is complete, you will wake up in our recovery area. Our nurses will monitor your comfort and vital signs while the anaesthetic wears off. You will be able to see your family once you are stable and ready to go home.
What the operation involves
Your surgeon performs this procedure using an arthroscopic, or keyhole, approach. This involves making two or three small incisions, each about 1 cm long, over the shoulder. Through these tiny openings, your surgeon inserts a small camera and specialized instruments. This allows you to see inside the joint without needing a large cut.
The main goal is to relieve pressure on the structures underneath the bony roof of your shoulder. Your surgeon carefully removes small amounts of bone and inflamed tissue from this area. By smoothing the space, we create more room for your tendons to move freely. This helps reduce the pinching or impingement that causes your pain.
Once the decompression is complete, your surgeon closes the small incisions. The cuts are typically closed with sutures (stitches), staples, or medical glue, followed by a dressing to protect the area. The entire procedure is performed while you are asleep and feel no pain. This approach allows for precise treatment of the impingement while keeping the incisions minimal.
After the operation
You will wake up in the recovery ward with your arm in a sling and a dressing over the wounds. Most patients stay one night in hospital after this operation, though some are able to go home the same day. We manage your pain with standard medications to keep you comfortable. Do not drive for at least six weeks after any shoulder operation, regardless of which arm was operated on. You must wait until your surgeon clears you, typically at the six-week review. See Driving after upper-limb surgery. Someone should stay with you for the first 24 hours to help. Keep the dressing dry and clean. You may move your fingers and wrist gently to reduce swelling. Avoid lifting heavy objects or raising your arm above shoulder height during this initial period.
Recovery
You will have two or three small keyhole incisions. A tiny camera helps your surgeon see inside your shoulder. You can expect some swelling and pain in the first few days. This is normal. Your team will give you medicine to keep you comfortable. Resting with your arm supported helps the swelling settle.
You will wear a sling to protect your shoulder while it heals. You must not drive while wearing a sling. Our policy requires you to wait at least six weeks after any shoulder operation before driving, regardless of which arm was treated. You can drive again once your surgeon clears you, typically at the six-week review. See our guide on Driving after upper-limb surgery for more details.
Your physiotherapist will guide your rehabilitation. You will start gentle movements early to prevent stiffness. These exercises help restore strength and range of motion. You will gradually return to daily tasks as your pain decreases and your movement improves. Your timeline may differ; your surgeon and physio will guide you based on how you heal.
What can go wrong
Most patients do well, but problems can occasionally happen. Your surgeon and the team monitor you closely to spot any issue early.
If you have calcific deposits removed along with the decompression, your recovery may take longer. You might notice that pain persists for a longer time before you can return to unrestricted activity. This is different from cases where only tissue trimming is done. Be patient with your healing timeline and follow your team’s advice on pacing your return to daily tasks.
If you are having a rotator cuff repair alongside this procedure, be aware that adding decompression does not always improve long-term results. In some cases, outcomes may be lower compared to having the cuff repair alone. Your surgeon will discuss whether this extra step is necessary for your specific shoulder condition.
There is a small risk of a blood clot forming in the vein under your collarbone. This can lead to a pulmonary embolism, which is a blockage in the lung. You might experience sudden shortness of breath, chest pain, or coughing up blood. This is a medical emergency. If you notice these symptoms, call emergency services or go to the nearest emergency department immediately.
Prior decompression can increase the risk of a stress fracture in the shoulder blade if you ever need reverse total shoulder arthroplasty in the future. This means your bone may be more vulnerable to cracking under stress. Your surgeon will consider this history if you require further surgery down the line.
The complications table on this page lists typical rates if you want the specifics.
When to call us
Call us if you develop a fever, increasing wound redness or discharge, or sudden severe pain. Go to emergency if you notice calf swelling or shortness of breath. Contact us immediately for loss of sensation or if you cannot move your limb. These symptoms need urgent assessment to ensure your recovery stays on track.
