Which muscles make up the rotator cuff and which movements are they responsible for?
Supraspinatus - initiates abduction
Infraspinatus + teres minor - external rotators
Subscapularis - internal rotator
Which muscle is responsible for abducting the arm?
Deltoid
supraspinatus initiates
What is impingement syndrome of the shoulder?
Painful arc between 60-120 degrees
- tendons of rotator cuff (mainly supraspinatus) are compressed in the subacromial space during movement –> pain
What are some causes of impingement syndrome?
Tendonitis Subacromial bursitis Acromioclavicular OA + inferior osteophyte Hooked acromion Rotator cuff tear
What are the clinical features of impingement syndrome?
Painful arc 60-120 degrees
Pain radiates to deltoid and upper arm
Tenderness below lateral edge of acromion
Hawkins-Kennedy test induces pain
How is impingement syndrome diagnosed?
Clinically
Can be confirmed with MRI
What is the management for impingement syndrome?
NSAIDs, analgesia, physio + subacromial steroid injection (up to 3x)
If no response in 6 months –> subacromial decompression surgery
What is the usual clinical picture in a patient with a rotator cuff tear?
Sudden jerk in a patient > 40 –> pain + weakness
Which muscles are usually affected in a rotator cuff tear?
Usually supraspinatus
Large tears may extend into subscapularis + infraspinatus
What are the examination findings in a rotator cuff tear?
Weakness of initiation of abduction (supraspinatus) +/- internal and external rotation
Which tests can be done to identify tears in specific rotator cuff muscles?
Jobe’s test –> supraspinatus (weakness)
Gerber’s test –> subscapularis
Posterior cuff test –> infraspinatus + teres minor
How is a rotator cuff tear diagnosed?
USS or MRI
What are the management options for rotator cuff tear?
Conservative first line:
- analgesia, physio +/- steroid injection
Surgery - rotator cuff repair
- tends to fail because tears usually occur in diseased (degenerative) tendons
What is another name for frozen shoulder?
Adhesive capsulitis
Which age group tend to get frozen shoulder?
40-60 years old
What is the usually clinical course in frozen shoulder?
Initially pain predominates
Then becomes very stiff
Gradually ‘thaws’
Resolves after about 18-24 months
Which conditions are associated with frozen shoulder?
Diabetes
Hyperlipidaemia
Dupuytren’s disease
How is frozen shoulder diagnosed?
Clinically
What is the management for frozen shoulder?
Physiotherapy, keep exercising
Paracetamol + NSAIDs
Steroid injection/oral steroids if failing to improve
If still no better –> manipulation under anaesthetic or surgical capsular release
What is acute calcific tendonitis?
Acute severe shoulder pain due to calcium deposits in supraspinatus tendon
How is acute calcific tendonitis diagnosed?
Xray –> calcium deposits seen just proximal to greater tuberosity
What are the clinical features of biceps tendonitis?
Inflammation of tendon of long head of biceps –>
What is the management of biceps tendonitis?
Analgesia, ice therapy, physio
US guided steroid injections
Which structures may cause referred pain in the shoulder?
Neck
Cardiac
Diaphragmatic irritation