Fractures Flashcards
Definition of an open fracture
A fracture in which there is a direct communication between the external environment and the fracture
Importance of open fractures
higher energy injury
increased infection rate
soft tissue complications
long term morbidity
Gustilo classification of open fractures
type 1 - wound < 1cm - clean - simple fracture pattern type 2 - wound > 1cm - moderate soft tissue damage - adequate skin coverage - simple fracture pattern type 3 - extensive soft tissue damage - complex fracture pattern - 3A = adequate peritoneal coverage - 3B = tissue loss requiring soft tissue covering procedure (such as flap or graft) - 3C = vascular injury requiring repair
Management of open fractures
Full ATLS assessment and treatment
tetanus and antibiotic prophylaxis
repeated exam n/v status
wounds only handled to remove gross contamination
photograph/cover (saline swab) and stabilise limb
no provisional irrigation/exposure
radiographs
Indications for emergency urgent surgery in open fractures
polytraumatised patient marine or farmyard environment Gross contamination Neurovascular compromise compartment syndrome
What is a polytraumatised patient?
Multiple fractures that start the affect the physiology of the patient
What is compartment syndrome?
increasing pressure within a compartment -> causes swelling until it cannot swell anymore -> this increases the pressure and then the blood supply is cut off
4Cs of surgical debridement and fixation
colour
contraction
consistency
capacity to bleed
What are multiple debridements associated with?
poorer outcomes
scoring system to identify chance of amputation looks at…..
limb ischaemia
age range of patient (older = less likely to recover)
shock
injury mechanism
What counts as a low energy injury?
stab
gunshot
simple fracture
What counts as a medium energy injury?
Dislocation
open/multiple fractures
What counts as a high energy injury?
High speed MVA
rifle shot
What consists of a very high energy injury?
high speed trauma with gross contamination
Types of fracture patterns
transverse/short oblique
communication/butterfly fragments
segmental
with bone loss
types of soft tissue injury patterns
skin loss such that direct tension free closure is not possible
Degloving
injury to the muscles
injury to 1 or more major arteries
Definition of dislocation
complete joint disruption
Definition of subluxation
partial dislocation - not fully out of the joint
Investigations of dislocation
clinical
radiological
What ways does the shoulder dislocate?
Anterior
Posterior
Deformity of a dislocated shoulder
squared off
locked in internal rotation
deformity of a dislocated elbow
olecranon prominent posterior
which ways does the elbow dislocate?
posterior
which ways does the hip dislocate?
posterior
Deformity of a dislocated hip
Leg short, flexed
internal rotation
adduction
what way does the knee dislocate?
anteroposterior
deformity of a dislocated knee
loss of normal contour
extended
Which is the most common dislocation of the ankle?
Lateral
Deformity of a dislocated ankle
externally rotated
prominent medial malleous
Most common dislocation of subtalar joint
lateral
deformity of a dislocated subtalar joint
lateral displaced os calcis
indications for rib fracture fixation
large flail segments paradoxical breathing multiple rib fractures significant displacement intrathoracic pathology e.g. herniation chest wall deformity inability to control pain conventionally (including thoracic epidural)
Management of rib fracture
Conservatively with adequate analgesia
Risk factors of rib fracture
Blunt trauma to chest wall Major trauma Osteoporosis Steriod use COPD Cancer metastases
Presentation of rib fracture
Severe sharp chest wall pain - pain more severe with deep breaths or coughing
Chest wall tenderness over fracture sites
Crackles / reduced breath sounds if underlying lung injury - can also cause a drop in sats
What is flail chest?
A serious consequence of multiple rib fractures that can occur during trauma
What causes flail chest?
Two or more rib fractures along 3 or more consecutive ribs, usually anteriorly
What can flail chest cause if left untreated?
Serious contusional lung injury
Treatment of flail chest
Invasive ventilation
Surgery
Investigations of rib fracture
CT
CXR
Why is a CT the best investigation for rib fracture?
Shows the fractures in 3D and also the associated soft tissue injuries
What may inadequate ventilation predispose to?
Chest infections
When should surgical fixation of a rib fracture be considered?
If pain is still an issue and failed to heal within 12 weeks conservative management
When does compartment syndrome occur?
Following fractures
Following reperfusion injury in vascular patients
What is compartment syndrome?
Raised pressure within a closed anatomical space - which eventually compromises tissue perfusion resulting in necrosis
Two main fractures that have compartment syndrome as a complication
Supracondylar fractures
Tibial shaft injuries
Presentation of compartment syndrome
Pain especially on movement (even passive) Paraesthesia Pallor Arterial pulsation may still be felt Paralysis of the muscle group may occur
Investigations of compartment syndrome
Measurement of intracompartmental pressure measurements
- excess > 20mmHg abnormal
- > 40 mmHg diagnostic
Treatment of compartment syndrome
Prompt and extensive fasciotomies
How long does death of muscle groups occur in compartment syndrome?
4 - 6 hours
Intra vs extra capsular hip fracture
Intra - fracture proximal to the intertrochanteric line (line between greater and lesser trochanters)
Extra - fracture distal to this line
Treatment of intra vs extra capsular hip fractures
Intra
- internal fixation (cannulated hip screw) - (good pre morbid function)
- hemiarthroplasty (poor pre morbid function)
- total hip replacement if displaced
Extra - Dynamic hip screw
Presentation of scaphoid fracture
Tenderness in the anatomical snuffbox dorsally or
Tenderness in the scaphoid scaphoid tubercle volarly
Xray of scaphoid fractures
Occult on initial x ray
Becomes evident on repeat xrays 14 - 21 days following injury
Which type of fractures is compartment syndrome most associated with?
Supracondylar
Tibial shaft
Management for subluxation of radial head
Passive supination of elbow joint whilst elbow flexed to 90 degrees
Management of a trochanteric fracture
Sliding hip screw
Management of a sub trochanteric fracture
Intramedullary nail
What are the extracapsular fractures?
Trochanteric fractures
Subtrochanteric fractures
What is vital to be done in rib fractures?
Adequate analgesia - to ensure breathing is not affected by pain - inadequate ventilation may predispose to chest infections
Management of an open fracture
- IV Ax
- Photography
- Application of saline soaked gauze with impermeable dressing
What would excessive use of breakthrough analgesia make you think of the diagnosis?
Compartment syndrome
When does fat embolism syndrome occur?
Between 12 and 72 hours
Triad of fat embolism
Resp distress
Cerebral signs
Petechial rash
What is used to classify neck of femur fractures?
Garden classification system