hand and wrist injuries
Triangular fibrocartilage complex (TFCC)
- Cartilage between ulna and carpal bones - Torn with forceful rotation or hyperextension
Jersey finger
- Flexor tendon rupture - Unable to flex the DIP joint of the finger - Pain and swelling common - splint ice or x-ray and surgery
Falling with wrist flexed or extended
- Injury to the MCL of the thumb - also known as skiers thumb - Thumb forced into abduction
Boutonniere deformity
- MOI = impact over PIP joint - Unable to extend the PIP joint - Splint and refer to MD
mallet finger
- impact on finger tip - rupture of he extensor tendon - fingertip drops into flexion - splinting or surgery
what percent of injuries make up hand and wrist injuries
9%
Colles' fracture
Both radius and ulna fractured at the same time ( distal forearm)
This injury refers to a fracture of the radius and ulna that causes the arm to bend into extension at the fracture site.
Colles' fracture
What is it called when both bones in the forearm are broken?
Colles' fracture
Dislocation of lunate
Falling with wrist flexed or extended
Boxer's fracture
Fourth or fifth metacarpal fracture
Interphalangeal collateral ligament sprains
Located on either side of the finger joints
Dislocation of the interphalangeal or metacarpophalangeal joint
One bone moves dorsal, the other ventral
Which best describe boutonniere deformity?
PIP joint flexion and DIP joint hyperextension
Which ligament attaches the metacarpal of the thumb to the proximal phalanx of the thumb?
UCL
Flexor retinaculum
anterior and holds flexor tendons and median nerve
Non-union
bone does not join back together well
Which injury in the wrist involves compression of the median nerve resulting in tingling and numbness in the fingers and thumb?
carpal tunnel syndrome
what do joints in the hands do?
connect bone
Tendinitis that affects the abductor pollicis longus and extensor pollicis brevis is commonly known as
de Quervain's tendinitis
Avascular necrosis
death of bone due to poor blood supply
Which is a common sign of a dislocation in the wrist and hand?
deformity
Which tendons of the thumb are involved in De Quervains' syndrome?
extensor pollicis brevis and flexor pollicis brevis
what group of muscles is posterior?
extensors?
What is the most common injury mechanism for wrist injuries?
falling on an outstretched arm
How should jersey finger be splinted?
flexion
what group of muscles is anterior?
flexors
Describe the mechanism of injury for mallet finger
forced flexion.
The carpal bone most likely to fracture due to compression or contusion is called the
hamate
What is the common treatment for a gamekeeper's thumb injury?
ice and splint and refer for X-ray
When a flexor tendon is torn from the distal phalanx, resulting in an inability to straighten the finger, it is called
jersey finger
Radial collateral ligament
lateral collateral ligament
Which of the carpal bones is most commonly dislocated?
lunate
When an extensor tendon is torn from the distal phalanx, resulting in an inability to straighten the finger, it is called
mallet finger
Ulnar collateral ligament
medial collateral ligament
how many carpals and metacarpals does the hand have?
metacarpals: 14 carpals: 5
where is the scaphoid located?
near the thumb (radius side)
What bone is located beneath the anatomical snuffbox?
scaphoid
Which of the following carpal bones is found in the anatomical snuffbox?
scaphoid
A sprain to the medial collateral ligament of the thumb is called
skier's thumb and gamekeeper's thumb
This geometric structure, abbreviated TFCC, is located on the medial aspect of the wrist, between the ulna and carpal bones. It serves to cushion this area, but it is sometimes injured, especially with wrist hyperextension injuries.
triangular fibrocartilage complex
The most commonly sprained ligament in the thumb is called the
ulnar collateral ligament