Carpal tunnel Flashcards Preview

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Flashcards in Carpal tunnel Deck (10):
1

Superficial border of carpal tunnel

Flexor retinaculum

2

What side does flexor retinaculum originate

Lateral side

3

Contents of carpal tunnel

Flexor pollicis longus tendon - surrounded by synovial membrane
flexor digitorum profundus tendons and flexor digitorum superficialis tendons - surrounded by synovial membrane
Median nerve

4

Deep border of carpal tunnel

Laterally - tubercles of scaphoid and trapezium
Medially - hooks of pisiform and hamate

5

What is carpal tunnel syndrome

Compression of median nerve within carpal tunnel

6

How can CTS be caused

Thickened ligaments and tendon sheaths in carpal tunnel
External compression e.g. Drop handle bars on bike

7

Symptoms of CTS

Numbness, paresthesia and pain in median nerve sensory distribution which usually radiates to forearm
Pain worse in mornings and often wakes them up at night

8

Tests for CTS

Tapping nerve in carpal tunnel to elicit pain in median nerve distribution (Tinel's sign)
Holding wrist in Flexion for 1min to elicit numbness/pain in median nerve distribution (Phalen's manoeuvre)

9

Treatment of CTS

Splint to hold wrist in dorsiflexion over night
If unsuccessful:
Corticosteroid injections
Surgical decompression of carpal tunnel in severe cases

10

Causes of carpal tunnel syndrome

MEDIAN TRAP
Myoedema
Oedema
Diabetes
Idiopathic
Acromegaly
Neoplasm
Trauma
Rheumatoid arthritis
Amyloidoses
Pregnancy

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