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: 33 (femur, distal)
Locations:
(1) extra-articular fracture (A)
(2) partial articular fracture (B)
(3) complete articular fracture (C)
|
Extra-articular Fracture |
Type of Fracture |
Fracture Code |
|
simple |
apophyseal |
A1.1 |
|
|
metaphyseal oblique or spiral |
A1.2 |
|
|
metaphyseal transverse |
A1.3 |
|
metaphyseal wedge |
intact |
A2.1 |
|
|
fragmented, lateral |
A2.2 |
|
|
fragmented, medial |
A2.3 |
|
metaphyseal complex |
with an intermediate split segment |
A3.1 |
|
|
irregular, limited to the metaphysis |
A3.2 |
|
|
irregular, extending into the diaphysis |
A3.3 |
|
Partial Articular Fracture |
Type of Fracture |
Fracture Code |
|
lateral condyle, sagittal |
simple, through the notch |
B1.1 |
|
|
simple, through the load-bearing surface |
B1.2 |
|
|
multi-fragmentary |
B1.3 |
|
medial condyle, sagittal |
simple, through the notch |
B2.1 |
|
|
simple, through the load-bearing surface |
B2.2 |
|
|
multi-fragmentary |
B2.3 |
|
frontal (coronal) |
anterior and lateral flake fracture |
B3.1 |
|
|
unicondylar posterior (Hoffa) |
B3.2 |
|
|
bicondylar posterior |
B3.3 |
|
Complete Articular Fracture |
Type of Fracture |
Fracture Code |
|
articular simple, metaphyseal simple |
T- or Y-shaped with slight displacement |
C1.1 |
|
|
T- or Y-shaped with marked displacement |
C1.2 |
|
|
T-shaped epiphyseal |
C1.3 |
|
articular simple, metaphyseal multi-fragmentary |
with an intact wedge |
C2.1 |
|
|
with a fragmented wedge |
C2.2 |
|
|
complex |
C2.3 |
|
multi-fragmentary |
metaphyseal simple |
C3.1 |
|
|
metaphyseal multi-fragmentary |
C3.2 |
|
|
metaphyseo-diaphyseal multi-fragmentary |
C3.3 |
Specialty: Surgery, orthopedic, Emergency Medicine, Critical Care, Surgery, general
ICD-10: ,
