Fracture classifications Flashcards
Scapula Fx (Ideberg)
- Ideberg
- I: Anterior avulsion (ant. rim fx)
- IIA: Transverse Fx through glenoid fossa exiting inferiorly
- IIB: Oblique fx through the glenoid fossa exiting inferiorly
- III: oblique fx through the glenoid exiting superiorly and often associated with an acromioclavicular joint injury
- IV: Transverse fx exiting through the medial border of the scapula
- V: combination of type II and type IV
- VI: comminuted glenoid fx
Scapula fx (acromial)
- Type I: minimally displaced
- Type II: Displaced but does not reduce the subacromiall space
- Type III: Displaced with narrowing of the subacromial space
Scapula fx (Coracoid)
- Type I: proximal to CC ligaments
- Type II: Distal to CC ligaments
AC joint injury
- Rockwood grade
- I: AC ligament sprain
- II: AC tear, CC intact but sprained
- III: AC and CC torn with AC dislocation. Deltoid and trapezius muscles are usually detached from the distal clavicle
- IV: III with posterior displacement
- V: III with > 100% displacement
- VI: III with inferior displacement
What is a hill-Sachs lesion?
- A posterolateral head defect that is caused by an impression fracture on the glenoid rim
- This is seen in 27% of acute anterior dislocations and 74% of recurrent anterior dislocations
What is a Bankart Lesion?
- “Bony Bankart”
- Associated with glenoid rim fx
- Avulsion of anterio inferior labrum off glenoid rim
HAGL lesion
- This involves a stretching or tearing of the capsule, usually off the glenoid, but occasionally off the humerus due to avulsion of the glenohumeral ligaments
- humeral avulsion of Glenohumeral lig
Proximal humerus classification
- Based on # of parts
- A part is defined as displaced if there is > 1 cm of fracture displacement or > 45 degrees of angulation
- 1 part: No displaced fragment (regardless of # of fx lines)
- 2 part: Anatomic neck, surgical neck, GT, or LT
- 3 part: surgical neck + GT or surgical neck _+ LT
What is a Helstein-Lewis Fx?
-Spiral fx of distal 1/3 of humeral shaft associated with neuropraxia of Radial N.
Distal humerus Fx classification (Intercondylar)
- Riseborough and Radin . . Intercondylar
- Type I: Nondisplaced
- Type II: Displaced but not rotated
- Type III: displaced and rotated
- Type IV: Displaced, rotated and comminuted
Distal Humerus fx . . . Condylar
- Milch
- Type I: lateral trochlear ridge left intact
- Type II: Lateral Trochlear ridge part of the condylar fragment (medial or lateral)
Distal Humerus Fx . . Supracondylar
Gartland
- Based on degree of displacement
- Type I: Nondisplaced
- Type II: Displaced with intact posterior cortex. May be angulated or rotated
- Type III: Complete displacement; posteromedial or posterolateral
Capitellum fx classification
- Bryan and Morrey
- Type I: (Hahn-Steinthal frag) - involves large part of capitellum
- Type II: (Kocher-Lorenz frag) - Shear fx of articular cartiilage; . . “uncapping of the condyle”
- Type III: severely comminuted (morrey)
- Type IV: Coronal Shear fx with extension into Trochlea (McKee)
Olecranon Fractures . . Colton
-Colton: Nondisplaced (< 2 mm) or Displaced (Avulsion, T/O, Comminuted, fx-dislocation)
Olecranon Fx . . Mayo
- Type I fractures are nondisplaced or minimally displaced and are subclassified as either noncomminuted (type IA) or comminuted (type IB)
- Type II fractures have displacement of the proximal fragment without elbow instability; type IIA noncomminuted. Type IIB comminuted
- Type III fx feature instability of the ulnohumeral joint
Coronoid process fx class
- Regan and Morrey, based on size of fragment
- Type I: avulsion of the tip of the coronoid process
- Type II, a single or comminuted fragment involving 50% of the coronoid process or less
- Type III: a single or comminuted fragment involving > 50% of the process
Radial Head Fx classification
- Mason
- Type I: Nondisplaced
- Type II: Marginal fractures with displacement (impaction, depression, angulation)
- Type III: Comminuted fractures involving the entire head
- Type IV: Associated with dislocation of the elbow
What is an Essex-Lopresti lesion?
-This is defined as longitudinal disruption of forearm interosseous ligament, usually combined with radial head fracture and/or dislocation plus distal radioulnar joint injury
What is the elbow terrible triad
- Elbow dislocation
- Radial Head fx
- Coronoid process fx
Elbow instability scale
- Morrey
- I: posterolateral rotatory instability: + pivot shift test; lateral ulnar collateral ligament disrupted
- II: Perched condyles; varus instability; lateral ulnar collateral ligament, anterior and posterior capsule disrupted
- IIIa: Posteror dislocation; valgus instability; lateral ulnar collateral ligament, anterior and posterior capsule and posterior MCL disrupted
- IIIb: posterior dislocations; grossly unstable; lateral ulnar collateral ligament, anterior and posterior capsule, anterior and posterior MCL disrupted
What is nursemaid’s elbow
-Annular ligament stretches and radial head subluxates
What is a Monteggia Fx?
Proximal ulnar shaft fx + radial head dislocation
Fx classification for monteggia fx?
- BADO (based on Radial head location)
- I: Anterior disloc. with ant. angulated fx of ulna
- II: Post. Dis. with post angulated fx of ulna
- III: Lat. or anterolat. disloc. with rx of radius AND ulna
- IV: ant. disloc. with a fx of radius AND ulna
Monteggia fx are produced by various mechanisms. Describe the mechanisms of injury based on Bado classification?
- Type I: Forced pronation of forearm
- Type II: Axial loading of the forearm with a flexed elbow
- Type III: Forced abduction of the elbow
- Type IV: Type I mechanism in which the radial shaft additionally fails