Cumulative Trauma Flashcards
how long should hand tools be to reduce risk of CTD?
9cm (long enough to accomodate avg hand width of 9-12cm, or 4-5 inches)
at what position below the elbow should a work surface be?
5-10 cm (2-4 inches)
for precsion work, higher surfaces decrease strain
for heavier work, lower surfaces are better
what is the arcuate ligament?
aka “Osborne’s band or Osborne’s ligament or the cubital tunnel retinaculum
creates roof of cubital tunnel and is slack in elbow extension
pronator syndrome can be distinguished from CTS by diminished sensibility in which area?
sensory disturbance in the THENAR EMINENCE is associated with PRONATOR SYNDROME because this area is innervated by the palmar cutaneous branch, which arises 5-7cm proximal to the wrist and does not travel through the carpal canal
what other symptom distinguishes CTS from pronator syndrome
NIGHT PAIN occurs in CTS, NOT in pronator syndrome
which muscle may have an accessory slip known as Gantzer’s muscle?
FPL
can be a site of compression of the AIN
what is Drummer’s palsy?
EPL tendonitis or rupture
what is intersection syndrome?
tenosynovitis between first and second dorsal compartment
How do you perform Finkelstein’s vs Eichoff’s test?
Finkelstein’s is performed PASSIVELY by the therapist and Eichoff’s is performed actively with the patient holding their thumb in their palm with their own fingers. It has been shown to produce more false positives than Finkelstein’s
how can you distinguish compression at Guyon’s canal vs cubital tunnel?
DORSAL NUMBNESS only occurs in CUBITAL TUNNEL
dorsal cutaneous branch of ulnar nerve branches off in the distal third of the forearm, therefore numbness in the dorsal hand would have to be caused by a problem higher than the wrist
what is the anconeus epitrochlearis?
originates from medial border of olecranon and inserts to medial epicondyle. Crosses over the cubital tunnel and may cause compression of ulnar nerve
what are 2 compression sites for DRSN
- 8cm proximal to radial styloid at the fascial edge of the BR and ECRB
- at the subcutaneous position of the radial styloid
what positions place tension on DRSN?
combined wrist flexion, ulnar deviation, forearm pronation, and thumb opposition
what is a Berger or “closed fist” test?
a positive test occurs when patient has paresthesias after holding a full fist for up to 60 seconds with wrist in neutral, indicating incursion of the lumbricals into the carpal tunnel
what is Pillar pain?
a well-recognized complication after CTR. Pain in the thenar and/or hypothenar eminances or in the area of surgical incision after releasing the transverse carpal ligament, causing the muscles to separate and altering muscle origins
