Fractures Flashcards
Displacement
Translation of the distal fragment
Description of displacement in the hand
Volar
Dorsal
Angulation
Bone is at an improper angle
Medial angulation
Varus
Lateral angulation
Valgus
Carpal bones
Proximal
(Ulnar > Radial)
Triquetrium
Pisiform
Lunate
Scaphoid
Carpal bones
Distal
(Ulnar > Radial)
Hamate
Capitate
Trapezoid
Trapezium
Management of displaced and angulated fracture
Reduction under anaesthesia
Management of unstable extra-articular diaphyseal fracture
Fixed with open reduction and internal fixation
Management of displaced intra-articular fractures
Fixed with open reduction and internal fixation
Vessels prone to injury in pelvic fracture
Internal iliac
Pre-sacral venous plexus
Lateral compression fracture of the pelvis
Fractures through the pubic rami/ischium
SI joint disruption
Vertical shear fracture
Occurs due to axial force on one hemipelvis
Hemiplevis displaced superiorly
Open Book Pelvis Fracture
Anteroposterior compression injury
Which way does the surgical neck of the humerus displace in fracture?
Why?
Medial displacement of shaft
Due to pectoralis major
Mx of minimally displaced humeral fractures
Conservatively
Mx of displaced humeral fractures
Usually settle once muscle spasm stops
Mx of persistently displaced fractures
Usually internal fixation
Clinical Features of Anterior Shoulder Dislocation
Arm held adducted
Loss of symmetry
Axillary nerve injury (regimental badge patch)
Management of Anterior Shoulder Dislocation
Closed reduction under sedation/anaesthesia
Placed in a sling for 2-3 weeks then physiotherapy
Posterior Shoudler Dislocation
- Classic sign
- Mechanism
Light bulb sign on x- ray
Mechanism: posterior force on adducted internally rotated arm
Sign of anterior shoulder dislocation
Detachment of anterior glenoid labrum = Bankart lesion
Types of injury to the acriomioclavicular joint
Sprain
Subluxed
Dislocated
Subluxation of AC joint
Acriomioclavicular ligaments are usually ruptured
Dislocated AC joint
AC ligaments and coracoclavicular ligaments also disrupted
Mx of AC joint injuries
Wear a sling for a few weeks
Mechanism of transverse and comminuted humeral shaft fractures
Direct trauma
Mechanism of oblique and spiral fractures
Fall +/- twisting injury
Angulation acceptable in humeral shaft fractures
30 o
Shoulder and elbow joint allow for this
Complication of humeral shaft fracture
Radial nerve Injury
Presentation of radial nerve injury
Wrist drop
LOS in the 1st web space
Management of humeral shaft fracture
IM nail
Mx of distal intra-articular humerus fracture
Open reduction and internal fixation
Olecranon Fracture
=
Fracture of the olecranon process of the ulna
Mechanism of olecranon fracture
Fall onto the elbow
WITH
Contraction of the triceps
Mx of Olecranon fracture
ORIF
If transverse, fix with wiring
Mechanism of radial head and neck fractures
FOOSH
Signs of undisplaced radial fracture
Fat pad on lateral x-ray
What does a fat pad suggest?
of 1+ bones at the elbow
Presentation of undisplaced radial head fracture
Lateral pain on supination/pronation
Mx of minimally displaced and undisplaced radial head fractures
Conservatively - sling
Mx of displaced radial head fractures
May require surgery
- IF fragments prevent full extension
Which way does the elbow dislocate?
Mechanism?
Posterior
Mechanism: FOOSH
Mx of uncomplicated elbow fracture
Closed reduction
Short period in sling
Nightstick Fracture
= fracture of the ulnar shaft
Mx of Nightstick Fracture
Conservatively
ORIF may improve return to function
Mx of diaphyseal fracture of both bones in the forearm
ORIF
Mx of minimally angulated fractures of both bones in the forearm
- Children
Plaster cast
- The bones remodel
Mx of substantially angulated fractures of both arms in the forearm
MUA
Monteggia Fracture Dislocation
Definition
MURD
Fracture of Ulna
Radial Head Dislocation
Where does dislocation occur in Monteggia F-D?
Proximal head of the radius
Management of Monteggia F-D
ORIF of the fracture
Galeazzi Fracture Dislocation
Definition
GRUD
Fracture of the radius
Ulnar head Dislocation
Where does the dislocation occur in Galeazzi F-D?
Distal radioulnar joint
Investigation of Monteggi F-D
Forearm and elbow x-ray
Investigation of Galeazzi F-D
forearm and lateral wrist x-ray
Colles Fracture
= extra-articular fracture
Distal radius
Dorsal displacement
Which way does the fracture displace in Colle’s?
Dorsally
Complications of Colle’s fracture
Median nerve compression
Mx of minimally displaced Colle’s fracture
Splint only
Smith’s Fracture
= extra-articular fracture
Distal radius
Volar displacement
Mx of Smith’s Fracture
ORIF with plates and screws
Complications of Smith’s Fracture
Malunion
Which way does a Smith’s fracture displace?
Volar
Barton’s Fracture
= intra-articular
Distal radius
Dislocation of the radiocarpal joint
Classification of Barton’s Fracture
Volar
Dorsal
Mx of Barton’s Fracture
ORIF
Mx of comminuted intra-articular distal radius fracture
External fixation
Scaphoid fracture
- Mechanism
- Presentation
Mechanism: FOOSH
Tenderness in the anatomical snuffbox, pain compressing thumb metacarpal
Investigation of scaphoid fracture
4 x-ray views
Mx of scaphoid fracture
Plaster cast
Complications of scaphoid fractures
Non-union
Avascular necrosis
Perilunate dislocation
- Definition
- Mechanism
= dislocation of one of the carpal bones
Mechanism: hyperdorsiflexion
Mx of perilunate dislocation
Emergency
Closed reduction and pinning
Scaphoid Lunate Dissociation
- Sign
= scapho-lunate ligaments rupture
- See increased gap between scaphoid and lunate
Mx of scaphoid lunate dissociation
Closed reduction
K wiring
+/- ligament repair
Complications of femoral shaft fracture
Blood loss
Fat embolism
Management of femoral shaft fractures
Resuscitation
Closed reduction
Stabilisation
Distal femoral fracture
- Mechanism
Fall onto flexed position
Position of distal fragment in distal femoral fracture
- Mechanism
Flexed position
Gastrocnemii pulls distal fragment into flexed position
Mx of knee dislocation
EMERGENCY - high risk of vascular injury
Reduce urgently
NV assessment
Which way does the patellar ‘nearly’ always dislocate?
Laterally
Presentation of patellar dislocation
Pain over the medial retinaculum (tendon in knee)
May have haemarthrosis
Mx of patellar dislocation
Temporary splintage
Proximal tibial fracture
- Valgus stress
Causes lateral plateau fracture
Direct blow in proximal tibial fracture
- Risk
Can cause proximal fibular fracture
Injury to the common fibular nerve
Proximal tibial fracture
- Varus stress
Causes medial plateau fracture
Mx of proximal tibial fracture
Fixation
Mx of tibial shift fracture
- When non-operative?
Up to 50% displacement
5 o angulation
Mx of tibial shaft fracture
- Operative
Internal fixation
- If comminuted usually require surgery
Distal tibial fracture
= distal tibial extra-articular fracture
- In good position that can be treated conservatively
Mx of more distal distal tibial fracture
Plating
Mx of less distal distal tibial fracture
IM nail
Pilon fracture
= intraarticular fracture of distal tibia, needs ORIF
Why might an ankle fracture be unstable?
- Management
Rupture of the deltoid ligament
Mx: ORIF
Criteria for assessing ankle fracture
Ottawa
When to x-ray an ankle?
Severe localised bony tenderness
OR
Inability to weight bear 4 steps
Signs of deltoid ligament rupture on ankle x-ray
Talar shift on AP x-ray
Risk of calcaneal fracture
Compartment syndrome