Swelling may occur distal also but is much more common proximal to the carpal tunnel. And the tendon below teh median nerve is flexor hallucis longus. Flexor carpi radialis is outside the carpal tunnel and over the scaphoid
triad: palmar bowing of the flexor retinaculum (>2 mm beyond a line connecting the pisiform and the scaphoid) distal flattening of the nerve enlargement of the nerve proximal to the flexor retinaculum Thanks to Radiopedia Enlargement of the nerve seems to be the most sensitive and specific criterion, but what cut-off value for pathological size remains debated; normal cross-sectional area is given at 9-11 mm ², but the range of sizes deemed pathological is wide. One study has calculated that a 2 mm ² difference in nerve cross-section between the level of the pronator quadratus and the carpal tunnel has a 99% sensitivity and 100% specificity for CTS 4. Some of the other proposed findings include a flattening ratio of over 3 bowing of the retinaculum > 4 mm
Swelling may occur distal also but is much more common proximal to the carpal tunnel. And the tendon below teh median nerve is flexor hallucis longus. Flexor carpi radialis is outside the carpal tunnel and over the scaphoid
Many thanks for the video lecture.
The probe is placed over the proximal or distal wrist crease ? Kindly clarify.
"Swelling seen distal to the entrapment?" I'd say more commonly proximal to the entrapment, no?
'm agree with Vink's opinion : proximal is the right telling
triad: palmar bowing of the flexor retinaculum (>2 mm beyond a line connecting the pisiform and the scaphoid)
distal flattening of the nerve
enlargement of the nerve proximal to the flexor retinaculum
Thanks to Radiopedia
Enlargement of the nerve seems to be the most sensitive and specific criterion, but what cut-off value for pathological size remains debated; normal cross-sectional area is given at 9-11 mm ², but the range of sizes deemed pathological is wide.
One study has calculated that a 2 mm ² difference in nerve cross-section between the level of the pronator quadratus and the carpal tunnel has a 99% sensitivity and 100% specificity for CTS 4.
Some of the other proposed findings include
a flattening ratio of over 3
bowing of the retinaculum > 4 mm