OrthoNet

Ulna - approach

* position - supine with forearm across chest & tourniquet

* incision - longitudinal over subcut. border of ulna

* internervous plane - ECU (PIN) & FCU (ulnar n.)

* dissection
- incise deep fascia
- find interval btw ECU & FCU
- middle 1/3 - ECU fibers may need to be divided from bone
- at olecranon - FCU & anconeus run along plane of dissection
- incise periosteum
- prox. 1/5 of ulna - insertion of triceps may need to be detached to gain access to bone

* dangers
- ulnar n. - travels under FCU; should be identified proximally as it emerges btw 2 hds of FCU b4 stripping FCU from bone
- ulnar art. - runs on radial side of ulnar n.