- See:
-
Zone I injuries
-
Zone II injuries
-
Zone III injuries
-
Zone IV and Zone V:
- Discussion:
-
FDS serves as an isolated activator of middle phalanx;
- function is determined by holding adjacent phalanges in extension so that
flexor profundi cannot move;
- this is works for index & long fingers & usually ring finger;
- little finger should be tested by simultaneously flexing ring finger, since
little finger may have a single muscle belly w/ tendons to each of digits;
- Advantages of Superficialis Repair:
- repaired
FDS increases digit strength;
- improved flexion at PIP joints
- preserves short vincula which provides blood supply to
FDP and improves healing potential;
- acts as pulley for repaired profunda that provides improved excursion and strength;
- intact FDS prevents PIP hyperextension and DIP hyperflexion;
- Indications for FDS Sacrifice:
- when tendon repair requires sacrifice of pulleys
- when both tendons are lacerated & need to be immobilized at same level;
- Post Operative Care:
