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: 41 (tibia/fibula, proximal)
Locations:
(1) extra-articular fracture (A)
(2) partial articular fracture (B)
(3) complete articular fracture (C)
Extra-articular Fracture |
Type of Fracture |
Fracture Code |
avulsion |
of the fibular head |
A1.1 |
|
of the tibial tuberosity |
A1.2 |
|
of the cruciate insertion |
A1.3 |
metaphyseal simple |
oblique in the frontal plane |
A2.1 |
|
oblique in the sagittal plane |
A2.2 |
|
transverse |
A2.3 |
metaphyseal multi-fragmentary |
intact wedge |
A3.1 |
|
fragmented wedge |
A3.2 |
|
complex |
A3.3 |
Partial Articular Fracture |
Type of Fracture |
Fracture Code |
pure split |
of the lateral surface |
B1.1 |
|
of the medial surface |
B1.2 |
|
oblique, involving the tibial spines and one of the surfaces |
B1.3 |
pure depression |
lateral total |
B2.1 |
|
lateral limited |
B2.2 |
|
medial |
B2.3 |
split-depression |
lateral |
B3.1 |
|
medial |
B3.2 |
|
oblique, involving the tibial spines and one of the surfaces |
B3.3 |
Complete Articular Fracture |
Type of Fracture |
Fracture Code |
articular simple, metaphyseal simple |
slight displacement |
C1.1 |
|
one condyle displaced |
C1.2 |
|
both condyles displaced |
C1.3 |
articular simple, metaphyseal multi-fragmentary |
with an intact wedge |
C2.1 |
|
with a fragmented wedge |
C2.2 |
|
complex |
C2.3 |
multi-fragmentary |
lateral |
C3.1 |
|
medial |
C3.2 |
|
lateral and medial |
C3.3 |
Specialty: Surgery, orthopedic, Emergency Medicine, Critical Care, Surgery, general