Upper limb disease Flashcards
How is peripheral nerve compression different to cervical nerve root compression?
Does not cause dermatomal or myotomal changes, instead affects peripheral nerve and motor locations.
What forms the carpal tunnel of the wrist?
The carpal bones and the flexor retinaculum
What nerve passes through the carpal tunnel?
The medial nerve
What causes carpal tunnel syndrome?
Mostly idiopathic
BUT RA and conditions which cause fluid retention also cause
What is the presenting complaint in carpal tunnel syndrome?
Parasthesia in thumb and radial 2 1/2 fingers
worse at night
sometimes weakness of thumb
What can be seen on examination of the hand with carpal tunnel syndrome?
Loss of sensation or muscle wastage of thenar eminence
What is Tinel’s test?
Percussing over median nerve over the wrist and the transverse ligament, across the thumb
What is a positive Tinel’s test?
Pins and needles felt
What is Phalen’s test?
Hands together with dorsal surfaces touching for 30-60 seconds
What is a positive Phalen’s test?
Tingling in thumb, middle and half of ring finger.
What non-operative methods can be used to treat carpal tunnel syndrome?
Wrist splints at night
Steroid injection
What does the surgical treatment of carpal tunnel syndrome involve?
Division of the transverse carpal ligament under local anaesthetic.
What causes cubital tunnel syndrome?
Compression of the ulnar nerve at the elbow behind the medial epicondyle
How does cubital tunnel syndrome present?
Parasthesia in ulnar fingers.
On examination, what is expected in carpal tunnel syndrome?
Positive Tinel’s test
Positive Froment’s test (paper between fingers)
What bones make up the elbow joint?
Humerus
Radius
Ulna
What muscle causes elbow extension and where does it insert?
Triceps muscle
Olecranon process of the ulna
What muscle causes elbow flexion and where does it insert?
Biceps brachii
Bicipital tuberosity of the radius
Which is more common in the elbow:
RA or OA?
RA
What is lateral epicondylitis also called?
Tennis elbow
What is lateral epicondylitis?
Repetitive strain injury which results in micro-tears in the common extensor origin
How does lateral epicondylitis present?
Painful and tender lateral epicondyle and pain on resisted middle finger extension
What is the treatment for lateral epicondylitis?
Rest from exacerbating activities, NSAIDs and steroid injections.
Sometimes an elbow clasp brace
What is golfer’s elbow?
Medial epicondylitis
Why are steroid injections not used in golfers elbow as treatment?
Risk of injury to the ulnar nerve
When does OA occur of the elbow?
Most commonly after trauma
What surgical options are there with RA/OA of the elbow?
Surgical excision of the radial head
TER which restricts lifting severely
What is Dupuytren’s contracture?
Hyperplasia of palmar fascia
What is the pathology behind Duputryen’s contracture?
Proliferation of myofibroblast cells Type III (abnormal) collagen production
What fingers are most commonly affected by Duputryen’s contracture?
Ring and little
Half of cases are bilateral
Who tends to get Duputryen’s contracture?
Men
Alcohol cirrhosis
Diabetes
What surgical procedures are indicated for Duputryen’s contracture?
Fasciectomy- removal of all diseased tissue
Fasciotomy- division of cords
What is trigger finger?
Tendonitis of a flexor tendon
How does trigger finger present?
Painful, clicking sensation of the finger which does not release on extension.