Trans Radial socket trimlines

Question 1

Very Short TR (VSBE) < 35% of original limb

Answer 1

Anterior trim line: distally from the elbow axis about 1-2” or enough to allow 90 deg of elbow flexion

Posterior trim line: encase olecranon when the elbow is flexed, but does not dig in proximally when fully extended

Question 2

short TR (35-55% of original limb)

Answer 2

Anterior: Distally from the elbow joint approx 2” to allow full flexion
Posterior: To allow elbow flexion without the olecranon displacing the socket.

Question 3

Long TR (35-55% of original limb)
Wrist Disartic

Answer 3

Anterior: 2.5-4” distal from axis of the elbow, to allow full flexion and rotation of the forearm.

Posterior: 1”distal to olecranon