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Flashcards in The Carpal Tunnel Deck (8):
0

What are the contents of the carpal tunnel?

Tendon of flexor pollicis longus
Four tendons of flexor digitorum superficialis
Four tendons of flexor digitorum profundus
Median nerve

1

What makes up the roof of the carpal tunnel?

Flexor retinaculum (attached medially to the hook of hamate and pisiform and attached laterally to the tubercles of the scaphoid and trapezium)

2

Describe the changes in the median nerve before and after passing through the carpal tunnel

The median nerve gives off its palmar cutaneous branch before entering the carpal tunnel.
Once it passes through the carpal tunnel, the median nerve divides into two branches (recurrent branch and palmar digital)

3

What are the tests for carpal tunnel syndrome?

Tinel's test - tapping over the carpal tunnel to re-create the symptoms in the hand
Phalen's test - to flex the wrist, and place the dorsal surfaces of the hands together with the tips of the digits pointing downwards
Duncan's test - apply pressure by pressing on the carpal tunnel for 30 seconds -positive if symptoms are recreated

4

What are the symptoms of carpal tunnel syndrome?

Pins and needles, pain (often worse at night), weakness and numbness

5

What are the possible treatments for carpal tunnel syndrome?

Steroid injection, wrist splints, surgical decompression (by dividing the flexor retinaculum)

6

What are the possible causes of carpal tunnel syndrome?

Myxoedema
oEdema premenstrually
Diabetes
Idiopathic
Acromegaly
Neoplasms

Trauma
Rheumatoid arthritis
Amyloidosis
Pregnancy

8

What makes up the floor of the carpal tunnel?

Deep carpal arch (proximal row of carpal bones)
The proximal row of carpal bones is made up of the scaphoid, lunate, triquetrum and pisiform