Conditions Of Wrist, Hand & Fingers Flashcards
What is the Triangular Fibrocartilage?
Disc overlying distal ulnar head
Disc binds end of distal radius & ulna together
Makes up a portion of TFCC complex which acts as a stabilizer of the distal radio-ulnar joint
Name all the Carpal Bones
Scaphoid Trapezium
Lunate Trapezoid
Triquetrum Capitate
Pisiform Hamate
What are the Joint of the Hand?
Carpo-metacarpal (CM) Inter-metacarpal Metacarpo-phalangeal (MCP) Inter-phalangeal (IP) - digits numbered 1-5 w/first being thumb (Knuckles = MP joints)
Describe an Inter-phalangeal joint
Proximal (PIP) & distal (DIP) & IP are hinge joints
Reinforced by articulating capsule joined by volar & collateral ligaments
What is the Wrist Retinacula?
Very thick fascial tissue
Protective pathways through which tendons, nerves & blood vessels pass
What is the job of the Flexor Retinaculum?
Protects extrinsic flexor tendons & median nerve
What is the role of the Extensor Retinaculum?
Pasageway for extrinsic muscles on the dorsal side of the wrist
What are the 3 Nerves of the hand?
Median }
Ulnar } Brachial Plexus
Radial }
What does the Median Nerve Supply?
Supplies majority of flexor & intrinsic muscle on radial side of Palm
Cutaneous sensation lateral 2/3 of Palm
How does medial nerve entrapment happen?
Strenuous/repetitive elbow motion
Pronator Teres/FDS tightness
What does the Ulnar Nerve innervate?
Innervates FCU & ulnar FDP
Cutaneous sensation of 5th & 1/2 4th on dorsal & palmar sides
What does the Radial Nerve innervate?
Superficial- skin on dorsum of hand
Deep- Innervates extensor muscles of forearm
Wrist Sprain MOI
Axial loading (FOOSH) Most common btwn scaphoid & lunate
Wrist Sprain S&Sx
TOP dorsum of hand of radio-carpal joint
Wrist Sprain Management
PIER
R/O #
Pain in ‘snuff’ box, scaphoid # indicator
Tape to prevent movement
What are the primary movements of the thumb?
Flexion Extension Opposition Abduction Circumduction
Game Keepers Thumb MOI
Tearing of UCL @ MP joint when MP near full ext & thumb forcefully abducted away from hand
Game Keepers Thumb S&Sx
Palmar aspect of thumb is swollen w/visible bruising & ⬆ ️pain or weakness w/pinching/opposition
Game Keepers Thumb Management
PIER
R/O #
Tape for instability
Valgus stress for MCP of thumb
Interphalangeal Collateral Ligament Sprain MOI
Excessive valgus/varus force/hyperextension
Interphalangeal Collateral Ligament Sprain S&Sx
Obvious deformity may or may not be present unless there is a # or a total rupture
Rapid swelling makes assessment difficult
Need to R/O dislocation or #
Interphalangeal Collateral Ligament Sprain Management
PIER Valgus/varus stress test Budding taping (2&3/4&5)
Dislocation of MC & phalanges MOI (MCP)
Rare injury
Hyperextension/shearing forces cause anterior capsule to tear allowing proximal phalanx to move backward
Dislocation of MC & phalanges MOI (PIP)
Hyperxtension & axial compression (ball hits tip of finger)
Dislocation of MC & phalanges MOI (DIP)
Usually occurs dorsally & may be associated w/an open wound
Individual often reduced their own dislocations
Dislocation of MC & phalanges S&Sx
Painful, swollen finger
Pain present at joint line
B/c of opportunity to entrap volar plates, no reduction it may lead to permanent disability
Dislocation of MC & phalanges Management
Immobilize in a wrist/finger splint in position found
When RTP, protect w/buddy taping
What is a STRAIN?
Occurs as a result of excessive overload against resistance/stretching of the tendon beyond its normal range