Orthopeadics Flashcards
What causes a transverse fracture?
From pure bending force
What causes an oblique fracture?
Shear force (fall from height)
What causes a spiral fracture?
Torsional forces
What is a comminuted fracture?
Fracture with 3+ fragments
Due to high energy trauma or poor bone quality
What is a segmental fracture?
Bone fracture sin two separate places
What is the order of fracture healing?
Fracture healing order:
1. Haematoma
2. Inflammation
3. Soft callus
4. Hard callus
5. Remodelling
What is the px and mx of compartment syndrome?
Px – severe pain, tensely swollen, loss of distal pulse and numbness
Mx - emergency fasciotomy
When do fat embolisms occur?
After long bone fractures where fat globules are released into circulation
-> Systemic inflammatory response 24-72hrs after fracture
Px of fat embolism?
Respiratory distress, petechial rash, cerebral involvement, jaundice, thrombocytopenia, fever
What is a Colle’s fracture?
- FOOSH -> transverse fracture of distal radius with dorsal angulation
- Displacement posteriorly (upwards) causing a “dinner fork deformity”
- Extra-articular
What is a smith fracture?
- Falling onto back of outstretched wrist -> transverse fracture of distal radius with volar angulation
- Reverse Colle’s fracture
- Extra-articular
What is the risk of a scaphoid fracture?
Only one blood supply so fracture can result in avascular necrosis & non-union
What is a Monteggia fracture-dislocation?
Ulna fracture + dislocation of radial head at elbow
Age 4-10 years commonly
What is a Galeazzi fracture-dislocation?
Radius fracture + dislocation of radioulnar joint
What nerve is at risk if a humeral shaft fracture?
Radial nerve risk
What nerve is at risk in a proximal humerus fracture?
Axillary nerve risk
Is an intertrochanteric hip fracture intra- or extra- capsular?
Extracapsular
Is a subcapital hip fracture intra- or extra- capsular?
Intracapsular
Is a subtrochanteric hip fracture intra- or extra- capsular?
Extracapsular
What is osteochondritis dissecans?
Inflammation of bone and cartilage which occurs in young adults due to increased physical activity and body weight
o Recurrent impact trauma -> bleeding + oedema in bone -> capillary compression -> bone necrosis -> bone fragmentation
Px & Mx of osteochondritis dissecans?
Px - Poorly localised pain, effusion, locking
Mx - Pinning or removal of unstable fragments
Who does osteoporosis affect?
Occurs – post-menopause, old age, steroid/alcohol use, malnutrition
What is used to Dx osteoporosis?
DEXA scan
T-scores of osteoporosis?
More than -1 Normal
-1 to -2.5 Osteopenia
Less than -2.5 Osteoporosis
Less than -2.5 plus a fracture Severe Osteoporosis
Mx of osteoporosis?
Calcium + Vitamin D
Bisphosphonates - Alendronate, Zoledronic acid
Others:
- Denosumab - blocks osteoclasts
- Strontium ranelate - stimulates osteoblasts, blocks osteoclasts
- Raloxifene (secondary prevention only)
- HRT (if early menopause)
Mx of osteoporosis?
Calcium + Vitamin D
Bisphosphonates - Alendronate, Zoledronic acid
Others:
- Denosumab - blocks osteoclasts
- Strontium ranelate - stimulates osteoblasts, blocks osteoclasts
- Raloxifene (secondary prevention only)
- HRT (if early menopause)Wha
What is osteomalacia?
Abnormal softening of bone due to deficient mineralisation
o Due to insufficient calcium absorption
Px of osteomalacia?
Bone pain, soft bone deformities, fractures, hypocalcaemia signs
Biochemistry markers seen in osteomalacia?
Low calcium
Low serum phosphate
High serum ALP
Mx of osteomalacia?
Vitamin D + calcium + phosphate supplementation
What is Paget’s disease?
Thickened, brittle and mishappen bones due to osteoclasts / osteoblasts speeding up
Px - constant dull bone pain
Mx of paget’s disease?
Bisphosphonates
What is impingement syndrome?
Compression of rotator cuff muscles in subacromial space -> thinning / tearing of tendons
Causes:
Injury or overuse causing thicker & swollen tendon (swimmer’s shoulder)
Abnormal acromion – curved bony growth
Px of impingement syndrome?
Painful arc between 60-120° of abduction, radiates to deltoid & upper arm
Hawkins-Kennedy test (internally rotating flexed shoulder) recreates pain
Px of adhesive capsulitis?
Progressive pain & stiffness of shoulder. Pain becomes negligible when shoulder is fully stiff.
Resolves in 18-24mo where the shoulder ‘thaws’ out
Mx of adhesive capsulitis?
Physio, NSAIDs, corticosteroid injection, manipulation under anaesthesia (teras capsule)
What is the Px of acute calcific tendonitis?
Acute, severe shoulder pain due to calcium deposits in the supraspinatus tendon
Where / when is the pain with lateral epicondylitis?
Extensor region (outside of elbow)
Pain on wrist extension
Where / when is the pain with medial epicondylitis?
Flexion region (inside of elbow)
Pain on wrist flexion, tingling in digits
Mx of epicondylitis?
Resolves with rest, physio, NSAIDs in meantime
Steroid injections in lateral (risk to ulnar nerve in medial)
Ix & Mx of olecranon bursitis?
Ix – Aspirate -> microscopy + culture
Mx:
- Non-infectious -> RICE + analgesia
- Infection -> antibiotics (flucloxacillin)
What is dupuytren’s contracture?
Contractures at MCP and PIP joint
What is trigger finger?
- Tendonitis of flexor tendon
- Nodular enlargement
- Catches on tendon sheath
What is the px of trigger finger?
F>M, >40yrs
* Middle & ring finger
* ‘Clicking’ sensation
* Pain at base
* Worse in morning
What is a ganglion cyst?
Fluid filled swelling near a joint or tendon
Red flag back pain px?
Pain – constant, severe, worse at night, lasting >6 weeks
Worse on coughing – herniated disc
Systemic upset – fever, night sweats, weight loss, fatigue, malaise
What is scoliosis?
Lateral curvature of spine
Can be congenital, idiopathic or due to tumour, infection
- If painful -> urgent MRI
What is kyphosis?
Abnormal rounding of upper back
Can be due to osteoporosis compression fractures
What is cervical spondylosis?
Degenerative changes in cervical spine
+/- radiculopathy
What are the spine levels?
Cervical 7
Thoracic 12
Lumbar 5
Sacrum 5
Coccyx 4