ORTHOPAEDICS Flashcards
What class of cell are osteoclasts?
Macrophages
What type of collagen is in bone?
Type 1
What are the stages to fracture healing?
Haemotoma Inflammation Callus formation Bone union Remodelling
In a tension pneumothorax what is the treatment?
Cannula insertion into 2nd intercostal space to burst the bubble Chest drain into 5th intercostal space mid axilla
What is special about a cast in the first 2 weeks?
Not circumferential (allow fracture to swell - reduces risk of compartment syndrome)
In a fracture, if a limb can rotate along its long axis what should be done?
Plaster cover above and below
What are the common organisms in septic arthritis?
S. Aureus
S . Gonorrhoea
Salmonella
Risk factors for septic arthritis?
>80 y/o
Pre-existing joint disease
Diabetes
Chronic renal failure
Joint prosthesis
What are the features of septic arthritis?
Single swollen joint
Pyrexia
Pain on movement
What are some differentials for septic arthritis?
Osteoarthritis
Haemarthrosis
RA
What are some investigations for septic arthritis?
Routine bloods, FBC and CRP
Blood cultures
Joint aspiration (before abx)
Joint fluid analysis
What is the management of septic arthritis?
Empirical abx treatment
What are the main complications of septic arthritis?
Osteoarthritis
Osteomyelitis
What are some risk factors for osteomyelitis?
Diabetes
Immune suppression
Alcohol excess
What is the gold standard for diagnosing osteomyelitis?
Culture from bone biopsy at debridgement
What is the treatment for osteomyelitis?
Long term IV antibiotic use
What is the pathophysiology of OA?
Loss of Articular cartilage
Remodelling of underling bone
What are some risk factors for OA?
Obesity
Age
Female
Manual labour jobs
What are the features of OA?
Pain and stiffness in joint worse on activity
What are some investigations for OA?
Clinical diagnosis usually
XR features:
Loss of joint space
Osteophytes
Subchondral cysts
Subchondral sclerosis
What is the management of OA?
Strengthening and exercise
Weight loss
Physio
Topical NSAIDs
Intra-Articular steroid injection
Surgery
What is an open fracture?
Fracture haemotoma is communicating with the outside
What can occur as a result of an open fracture?
Tissue loss
Neurovascular injury
Infection
What is the management in open fractures?
Check neurovascular status
Assess evidence of contamination
Need for plastic surgery input should be identified early
What classification should be used for open fractures?
Gustilo-Anderson
What is the management of open fractures?
Urgent realignment and splinting of the limb
Broad spectrum abx
Tetanus vaccination
Photograph wound
What are some symptoms of compartment syndrome?
Pain disproportionate to the injury
Parasthesia distally
What is the investigation for Compartment syndrome?
Clinical
Intra-compartmental pressure monitor
What is the treatment of compartment syndrome?
Keep limb at neutral level
Fasciotomy
Monitor renal function closely after to assess potential effects of rhabdomyolysis or reperfusion injury
What cancers cause secondary bone cancer?
Renal
Thyroid
Lung
Prostate
Breast
What is another term for frozen shoulder?
Adhesive capsulitis
What can cause secondary capsulitis?
Subacromial impingement syndrome
Diabetes mellitus
Previous surgery
What are the features of adhesive capsulitis?
Generalised deep and constant pain disturbing sleep
Causes stiffness and reduction in function
Tenderness on palpating with poor localisation of pain
Which movement will patients struggle with for adhesive capsulitis?
External rotation and shoulder flexion
What is the differential diagnosis for adhesive capsulitis?
Muscular tear
Subacromial impingement syndrome
How is adhesive capsulitis diagnosed?
Clinically
How is adhesive capsulitis managed?
Education and reassurance
Management of pain - paracetamol and NSAIDs
Who typically gets biceps tendonipathy?
Younger patient who are active
What are the features of biceps tendonipathy?
Pain worse with flexing
Tenderness over affected tendon
Disuse atrophy
What is the management of biceps tendinopathy?
Conservative
Analgesia
Physio
Surgery
When do clavicle fractures occur?
Young and female or >60 (after osteoporosis)
How do the medial and lateral clavicle displace after fracture?
Medial = superior - SCM
Lateral = inferior - Weight of arm
How are clavicle fractures management?
Mainly conservatively in a sling
When do distal biceps tendon rupture?
Sudden forced extension of a flexed elbow
What are some risk factors for biceps rupture?
Steroid used
Smoking
CKD
How is a bicep rupture diagnosed?
Ultrasound imaging
How are clavicle fractures managed?
Conservatively with sling
Early movement of shoulder to prevent frozen shoulder
What is a complication of a clavicular fracture?
Non-union
Neurovascular injury
What nerve can be damaged in Humeral shaft fractures?
Radial nerve (in radial groove)
What are some risk factors for Humeral shaft fractures?
Osteoporosis
Older age
Previous fractures
What indicates radial nerve damage in Humeral shaft fracture?
Reduced sensation over 1st dorsal webspace
Weakness in wrist extension
What investigations should there be for Humeral shaft fracture?
AP and lateral plain film radiograph
How is a Humeral fracture managed?
Conservative re-alignment of the limb
Surgery
What are some complications of Humeral shaft fractures?
Non-union
Radial nerve injury
What muscles comprise the rotator cuff muscles?
Supraspinatus - abduction
Infraspinatus - external rotation
Teres minor - external rotation
Subscapularis - internal rotation
What are the main risk factors for rotator cuff tears?
Age
Trauma
Overuse
Repetitive overhead shoulder motions
What are the clinical features of rotator cuff tear?
Pain over lateral aspect of shoulder
Inability to abduct arm over 90 degrees
What is the investigation for a rotator cuff tear?
Plain film radiograph to exclude fracture
Ultrasound to assess presence and size of tear
What is the management for rotator cuff tear?
Conservative (if presenting within 2 weeks)
Surgery
What is the main complication of a rotator cuff tear?
Adhesive capsulitis
What timeframe classifies an acute rotator cuff tear?
<3 months
What is the most common type of shoulder dislocation?
Anteroinferior
When does a posterior shoulder dislocation typically present?
Seizures
What nerves can become compromised in a shoulder dislocation?
Axillary nerve
Where are bony bankart lesions and hills-sachs defects typically seen?
Bony-bankart (fracture of anterior inferior glenoid bone)
Hill-Sachs defects (to the Humeral head)
What is the management of shoulder dislocations?
Analgesia
Reduction, immobilisation and rehab
Physio
What are some complications of Humeral dislocation?
Chronic pain, limited mobility, stiffness and recurrence
What can lead to rotator cuff impingement?
Muscular weakness
Shoulder overuse
What exaggerates pain in rotator cuff impingement?
Abduction in shoulder
What is the imaging for rotator cuff impingement?
MRI
What is the management of rotator cuff impingement?
Analgesia
NSAIDs
Physio
Surgery
How do fractures of the distal femur present?
Pain in distal thigh
Inability to weight bear
Obvious deformation
Haemarthrosis
How are the majority of distal femur fractures treated?
Surgically
Non surgically (minimal displacement / very-comorbid)
When are femoral shaft fractures seen?
High energy trauma
Fragility fractures
Pathological fractures
What blood supply is to the femur?
Penetrating branches of the Profunda femoris artery
What is the management for distal femur fracture?
Pain relief (regional blockade?)
Surgery
What are some possible complications of femoral shaft fractures?
Nerve injury
Mal union
Infection
Fat embolism