- Radiographs:
- rarely long posterior spike of distal fragment is comminuted;
- Fracture Characteristics:
- w/ supination external rotation frx, spiral oblique frx usually begins
in almost transverse plane distally on anterior surface of the fibula
at or just above level of plafond;
- it spirals externally, w/ frx exiting proximally on its posterior surface;
- hence, look for posterior spike;
- malleolar fragment carries the lateral attachment of
ATLF
- this structure can often be a guide to reduction;
- Technique:
- fracture is distracted with longitudinal distraction and inversion of the foot
opening the fracture site.
- fracture hematoma is curetted free from the bone ends.
- #15 blade was used to remove periosteum from edges of fracture site.
- reduction is obtained showing anatomic interdigitation of fracture fragments;
- reduce & internally fix
lateral malleolus or fibular frx before fixing
medial malleolus component;
- expose fracture & anterior surface of fibula proximal to it, explore joint,
using an intra-articular angled retractor anteriorly;
- distal fibula is grasped with pointed reduction forceps & teased into position;
-
simultaneous control of proximal fibular fragment w/ bone aids reduction;
- small, pointed or lobster claw reduction forceps is used to oppose frx as
proximal and distal pieces are realigned;
- a useful technique to hold the reduction, involves insertion of one or
two K wires across the frx site;
- following this, reduction clamps can be applied to facilitate
insertion of a lag screw;
- K wires will have to be removed prior to
lag screw insertion;
- unless extensively comminuted, posterior spike can guide restoration
of length and rotational alignment;
- it may
be repositioned first, & held in place while reduction is completed;
- once reduction is achieved, no
talar tilt should remain;
- fixation of fibular in shortened or rotated position will often
cause rapid dissolution of the
ankle joint;
- usual reason for persistent
valgus talar tilt is comminuted fibular fracture
in which proper length has not be restored;