Arthroscopic decompression is a keyhole surgical procedure used to treat shoulder impingement and bursitis when symptoms persist despite non-operative treatment.
These conditions occur when the soft tissues within the shoulder, including the rotator cuff tendons and bursa, become irritated or compressed, leading to pain, inflammation, and difficulty with overhead movement.
When physiotherapy, activity modification, or injections no longer provide sufficient relief, arthroscopic decompression can improve pain and function. This is performed to create more space within the shoulder joint, remove inflamed bursa and bone spurs.
On this page, you will learn what arthroscopic decompression involves, when it may be recommended, how the procedure is performed, and what to expect during recovery. During your consultation, Dr Richard Dallalana will provide personalised advice based on your symptoms, shoulder function, and overall condition.
Arthroscopic decompression, also referred to as subacromial decompression, aims to relieve this pressure by increasing the space available for the tendons and bursa to move. This is achieved using a keyhole technique, allowing the joint to be visualised and treated with minimal disruption to surrounding tissues. During the procedure, inflamed and thickened bursal tissue is removed and any bone spur is removed from the undersurface of the acromion to reduce mechanical compression. This helps create a smoother pathway for tendon movement and reduce pressure on the rotator cuff.
Healthy bursal tissue is left in place.
It is protective of the rotator cuff tendon if a large spur was present, assisting in preventing further damage.
Shoulder impingement commonly causes pain and restriction of arm movement during overhead or reaching activities. Symptoms often develop gradually following increased repetitive activity or strain.
Common symptoms include:
Symptoms can vary in severity. Some patients experience discomfort only with repetitive activity, while others find that pain begins to interfere with sleep, work, and daily tasks. Persistent symptoms despite physiotherapy or other non-surgical treatments may suggest ongoing mechanical compression within the shoulder, which may require surgical treatment.
Shoulder impingement surgery (decompression) is usually considered when symptoms persist despite appropriate non-operative treatment and continue to affect daily activities.
Diagnosis of shoulder impingement and bursitis involves understanding both your symptoms and the underlying structure of the shoulder.
Your shoulder is assessed through a detailed physical examination to evaluate how the joint is functioning.
Certain clinical tests help identify whether the rotator cuff tendons and bursa are being compressed during movement.
Tests include:
Imaging can help confirm the diagnosis and exclude other more major issues
This may include:
Note that the presence of bursitis is not uncommon in shoulders with no pain, and it is not considered a source of pain unless accompanied by the correct symptoms and findings on physical examination.
Shoulder impingement and bursitis can occur alongside other conditions, which may influence treatment decisions.
These may include:
* Impingement / bursitis is rarely the major problem in active people under the age of 30 – other diagnostic possibilities need to be excluded, particularly labral tears within the shoulder joint.
Arthroscopic decompression is performed using a minimally invasive (keyhole) technique under a general anaesthetic. Two or 3 Small incisions (7 to 8 mm) are made around the shoulder to insert a camera (arthroscope) and small specialised instruments. This allows the joint to be visualised in detail and treated with minimal disruption to surrounding tissues.
During the procedure, the following steps are usually performed:
The aim is to increase the space within the shoulder so that the rotator cuff tendons can move more freely without ongoing irritation.
The procedure typically takes around 30 to 45 minutes, depending on the findings.
If other issues are identified during surgery these may be addressed at the same time where appropriate.
Other conditions which may be encountered:
Tight joint capsule and inflammation – this may be due to the presence of a frozen shoulder and can be released and cleaned at the same time improving movement
Arthroscopic decompression is usually performed as a day procedure, meaning you can return home on the same day.
You will be admitted to hospital and prepared for the procedure. This includes meeting the anaesthetist and nursing team, confirming the surgical plan, and completing pre-operative checks.
Consent for surgery forms are signed on the day. The procedure is performed under a general anaesthetic.
After the procedure, you will be monitored in recovery before returning to your room.
Your arm may be placed in a sling for comfort, although this is usually only required for a short period.
Pain is managed using a structured approach:
Most patients find pain manageable with simple medication.
Most patients stay one night in hospital however this procedure can be performed as a day case if desired
Before leaving, you will be provided with:
In the first few days after surgery:
Ice to control pain and mild swelling for a few days
You may drive
You may use the arm normally for home activities and light work
Rehabilitation typically progresses in stages:
The pace of recovery varies depending whether additional procedures were performed.
Additional movement and use restrictions may apply based on the nature of any additional procedures needed. These will be advised accordingly and information can be found on the relevant sections.
As a general guide:
Most patients recover by 2 to 3 months, with further small gains in strength and function in the next couple of months beyond this.
The aim of surgery is to reduce pain and improve shoulder movement.
Outcomes depend on factors such as the severity of the condition, the presence of associated conditions and adherence to rehabilitation instructions.
Arthroscopic decompression for shoulder impingement is a commonly performed procedure. As with all surgery, there are potential risks and complications that should be understood before proceeding.
Risks associated with most procedures may include:
Measures are taken to help reduce these risks, including sterile technique, appropriate medications, and pre-operative assessment.
Complications following arthroscopic decompression are uncommon but may include:
You should seek medical review if you experience:
Arthroscopic decompression is performed to reduce pain and improve shoulder movement when symptoms have not responded to non-operative treatment.
Many patients experience:
Improvement is usually gradual and continues over several weeks as movement and strength return.
Recovery and outcomes can vary depending on:
In cases where there are additional conditions recovery may take longer.
In cases where impingement and bursitis are the only significant conditions then a good outcome is very predictable.
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