T+O Flashcards
Osteoarthritis (OA)
- wear + tear of joints
- loss of cartilage, osteophyte formation, inflammation
- hips, knees, DIPJ, CMC base of thumb, lumbar spine, c-spine
OA Px
- joint pain
- stiffness, <30mins morning, worse after activity
- reduced ROM
- crepitus
- effusions
- bulky/bony enlargement of joint
Hands
- Heberdens nodes - DIPJ
- Bouchards nodes - PIPJ
- DIPJ>PIPJ
- Squaring at base of thumb (CMC joint)
- weak grip, reduced ROM
OA Ix
Dx
- > 45yo, typical pain, <30mins morning stiffness
XR - LOSS
Loss of joint space
Osteophytes
Subarticular sclerosis
Subchondral cysts
Oxford Hip Score
OA Mx
- OT/PT, lose weight, exercise
- topical NSAIDs
- oral NSAIDs (+PPI)
- weak opiates, paracetamol - short-term
- intra-articular steroid injections
- arthroplasty
Hip replacement Cx
- VTE, intraoperative fracture, nerve injury, infection
- Leg length discrepancy
- posterior dislocation
- aseptic loosening
- prosthetic joint infection
XR interpretation
Initial approach
- patient details, XR details
- adequacy - 2 views, joint above+below, rotation, penetration
- previous imaging
ABCS approach
- alignment, joint space
- bone texture
- cortices
- soft tissues
- what bone, area, articular surface involvement
- type of fracture
Types of fractures
COMPLETE – fracture extends all the way through bone
- Closed – no break in skin
- Open – break in skin
- Transverse – right angle to shaft
- Oblique – angle to shaft
· Eg Toddler’s fracture – oblique tibial fracture in infants
- Spiral – twisting
- Segmental – more than one fracture along bone
- Comminuted – 2+ bone fragments
- Compression – involving vertebrae in spine
- Impacted – fractured bone forced together
INCOMPLETE (not all the way through cortex) – commonly children
- Greenstick – bending of shaft, fracture on convex surface
- Buckle (torus) – fracture of shaft of bone characterised by bulging of cortex
- Salter-Harris – involving growth plate
- Bowing – bend in bone shaft – plastic deformity
Fracture displacement
- Describe in terms of distal fragment to body (eg anterior/posterior)
- Angulation – change in axis of bone – dorsal / palmar, varus/valgus, radial/ulnar
- Translation – movt of fractured bones away from each other – use width of bone, eg 25% - if >100% - describe as off-ended
- Rotation – difficult to see on XR
Fracture causes
- trauma - excessive force
- stress-related - repetitive low velocity injury
- pathological - abnormal bone, fractures during normal use
Fracture healing
- Haematoma formation, dead bone removed
- Fibrocartilaginous callus formed, then bony callus, then replaced by trabecular bone
- Remodelled into lamellar bone
- Fracture healing delayed if bone ends are mobile, infected, misaligned, avascular
Fracture Px
- pain
- deformity
- loss of function
Fracture Ix
- check for other injuries
- NV status of limb
- XR - 2 views, inc joint above + below
- CT +/- angio maybe
Fracture Mx
- immobilise, inc joints above + below
- reduce if necessary
- analgesia
- open - IV abx, tetanus, debride + lavage <6hrs, avoid internal fixation
- simple - fracture clinic follow up
- complex - NBM, add to trauma list for morning
- mechanical alignment - manipulation / surgery
- stability - casts, wires/plates/screws, ORIF, external frame
- rehab early
Fracture Cx
Early
- damage to local structures
- haemorrhage
- compartment syndrome
- fat embolism
- VTE
Long-term
- delayed union, malunion, non-union, avascular necrosis, osteomyelitis, joint instability, stiffness, arthritis, chronic pain
Paediatric fractures
Complete – both sides of cortex breached
Toddler’s fracture – oblique tibial fracture in infants
Bowing – plastic deformity, no break
Greenstick fracture – bending of shaft, fracture on convex surface
Buckle / torus fracture – incomplete cortical disruption resulting in periosteal haematoma
Growth plate fractures – fracture of growth plate – Salter-Harris classification
Paediatric fractures NAI
- Delayed presentation
- Delay in attaining milestones
- Lack of concordance between proposed and actual mechanism of injury
- Multiple injuries
- Injuries at sites not commonly exposed to trauma
- Children on the at risk register
Paediatrics pathological fractures
eg osteogenesis imperfecta
Fat embolism
- fat globule released into circulation after long bone fracture
- lodges in pulm arteries
- causes systemic inflammatory response
Fat embolism Px
- 24-72hrs after fracture
Gurd’s major criteria
- Respiratory distress
- Petechial rash
- Cerebral involvement – confusion, agitation
Gurd’s minor criteria
- Jaundice, thrombocytopenia, fever, tachycardia, retinal haemorrhages,, renal signs, high ESR, anaemia….
Fat embolism Ix
- imaging may be normal
- CTPA - may not show occlusion
Fat embolism Mx
- supportive
- operate early to reduce risk
- VTE prophylaxis
Compartment syndrome
- high pressure in fascial compartment - cuts off blood supply
- associated with fracture / crush injury - bleeding/swelling in compartment
- restrict capillaries, then venous, then arterial - ischaemia + necrosis
Compartment syndrome Px
- pain - disproportionate
- paraesthesia
- pale - initially warm + swollen
- pressure high
- paralysis - late
Compartment syndrome Ix
- clinical dx
- needle manometry