The AO-ASIF (Arbeitsgemeinschaft fur Osteosynthesefragen, Association for the Study of Internal Fixation) developed a classification system for fractures, based on location and type of fracture.
Code for location: 44 (tibia/fibula, malleolar segment)
Locations:
(1) infrasyndesmotic lesion (A)
(2) transsyndesmotic fibular fracture (B)
(3) suprasyndesmotic lesion (C)
|
Infrasyndesmotic Lesion |
Type of Fracture |
Fracture Code |
|
infrasyndesmotic lesion, isolated |
rupture of the lateral collateral ligament |
A1.1 |
|
|
avulsion of the tip of the lateral malleolus |
A1.2 |
|
|
transverse fracture of the lateral malleolus |
A1.3 |
|
infrasyndesmotic lesion, with fracture of the medial malleolus |
rupture of the lateral collateral ligament |
A2.1 |
|
|
avulsion of the tip of the lateral malleolus |
A2.2 |
|
|
transverse fracture of the lateral malleolus |
A2.3 |
|
infrasyndesmotic lesion, with postero-medial fracture |
rupture of the lateral collateral ligament |
A3.1 |
|
|
avulsion of the tip of the lateral malleolus |
A3.2 |
|
|
transverse fracture of the lateral malleolus |
A3.3 |
|
Transsyndesmotic Fibular Fracture |
Type of Fracture |
Fracture Code |
|
transsyndesmotic fibular fracture, isolated |
simple |
B1.1 |
|
|
simple, with rupture of the anterior syndesmosis |
B1.2 |
|
|
multi-fragmentary |
B1.3 |
|
transsyndesmotic fibular fracture, with medial lesion |
simple, with rupture of the medial collateral ligament and rupture of the anterior syndesomosis |
B2.1 |
|
|
simple, with fracture of the medial malleolus and with rupture of the anterior syndesmosis |
B2.2 |
|
|
multi-fragmentary |
B2.3 |
|
transsyndesmotic fibular fracture, with medial lesion and a Volkmann |
fibula simple, with rupture of the medial collateral ligament |
B3.1 |
|
|
fibula simple, with fracture of the medial malleolus |
B3.2 |
|
|
fibular multi-fragmentary, with fracture of the medial malleolus |
B3.3 |
where:
• A Volkmann is a fracture of the postero-lateral rim.
|
Suprasyndesmotic Lesion |
Type of Fracture |
Fracture Code |
|
suprasyndesmotic lesion, diaphyseal fracture of the fibula, simple |
with rupture of the medial collateral ligament |
C1.1 |
|
|
with fracture of the medial malleolus |
C1.2 |
|
|
with fracture of the medial malleolus and a Volkman (Dupuytren) |
C1.3 |
|
suprasyndesmotic lesion, diaphyseal fracture of the fibula, multi-fragmentary |
with rupture of the medial collateral ligament |
C2.1 |
|
|
with fracture of the medial malleolus |
C2.2 |
|
|
with fracture of the medial malleolus and a Volkman (Dupuytren) |
C2.3 |
|
suprasyndesmotic lesion, proximal fibular lesion |
without shortening, without Volkmann |
C3.1 |
|
|
with shortening, without Volkmann |
C3.2 |
|
|
medial lesion and a Volkmann |
C3.3 |
Specialty: Surgery, orthopedic, Emergency Medicine, Critical Care, Surgery, general
