MSK Flashcards
What is the diagnostic test for fractures?
Xray
What imaging modality is best for soft tissue and liagments?
MRI
what can treatment of an open fracture involve?
ORIF = open reduction, internal fixation
surgical debridement
IV abx
tetanus vaccine
What can treatment of a closed fracture involve?
treated non-surgically with immobilisation
What is the most common fracture in children?
Greenstick
what is a subluxation? How does it present?
Partial dislocation
often after injury
often obvious deformity or typical posturing
Ix and Mx for a subluxation?
XR to confirm diagnosis and rule out any concurrent fractures
Mx - reduction & stabilisation
check neurovascular status before and after
What does presentation of compartment syndrome involve?
Pain out of proprotion - excessive need for breakthrough pain relief pallor parathesia pulselessness polkilothermia paralysis
Investigations for compartment syndrome
intracompartmental pressure measurements
>20mmHg - abnormal
>40mmHg - diagnostic
XR usually normal
CK and urine myoglobulin elevated
What does management of Compartment syndrome involve?
Immediate fasciotomy
aggressive IV fluids -
fasciotomy often results in renal failure
if tissue necrotic - consider debridement and amputation
Patient presenting with a couple days history of pain moving shoulder
middle aged
diabetic
hx of shoulder injury/surgery
Adhesive capsulitis
what conditions is adhesive capsulitis associated with?
diabetes
thyroid disease
what clinical signs O/E are indicative of adhesive capsulitis?
external rotation more affected
Coracoid pain test positive
What investigations are done for adhesive capsulitis?
none - usually clinical
XR only done if symptoms persistent or is presentation atypical - r/o any fractures of posterior dislocation
How is adhesive capsulitis managed?
first line - NSAIDs and physio
second line - intra-articular steroids (can give PO)
Pain on abduction and positive empty can test
which muscle is affected?
Supraspinatus
Pain on external rotation
which tendon is affected?
Infraspinatus
adhesive cap is a ddx - with hx of DM
Pain on internal rotation
which tendon is affected?
Subscapularis
Painful abduction
recent over the head activity
painful arc 60-120°
anterior acromion tenderness
Subacromial impingement
Management approach for rotator cuff injuries?
NSAIDs
physio
IA steroids - if symptoms persistent or unresponsive to NSAIDs
FOOSH followed by externally rotated arm at side of body
greater fullness of the shoulder
may be visibly deformed
Anterior shoulder dislocation
Ix and management for Anterior shoulder dislocation?
XR
reduction and appropriate pain relief
Which nerve should be tested on shoulder dislocations? How is it tested?
axillary nerve
- check sensation in the deltoid
Causes of posterior shoulder dislocation?
seizures
electrocution
medially rotated arm - very locked in position
front of shoulder appears flat
prominent coracoid process
posterior dislocation
Ix and Mx of posterior dislocation
XR - axillary view
mx - posterior reduction (closed)
if missed/ no detected - open reduction up to 8/52 after injury
Lower back pain red flags
aged under 20 or over 50 hx of previous malignancy night pain/ pain wakes them up hx of trauma systemically unwell/constitutional symptoms saddle anaesthesia loss of anal sphincter tone loss of bowel/bladder continence
Diagnosis of lower back pain
clinical - no lab or imaging needed
Management of lower back pain
Patient education
Analgesia - NSAIDs/Paracetamol
muscle relaxants
! avoid bed rest !
morning stiffness <15mins worse with certain activities onset often post injury fluctuating symptoms overuse also RF
mechanical back pain
morning stiffnedd >1hr better with movement insidious onset progressive typically younger patients
Inflammatory back pain
male in 20s lower back pain of insidious onset morning stiffness (longer duration) improves on exercise pain at night - imporved on getting up sacroiliac pain
Ankylosing spondylitis
signs of ankylosing spondylitis on examination
reduced lateral flexion
reduced forward flexion
positive schobers test (>5cm)
Other features of Ankylosing spondylitis?
6As apical fibrosis (lung disease) anterior uveitis aortic regurg achilles tendonitis AV node block amyloidosis
Investigations for ankylosing spondylitis
raised inflammatory markers - ESR/CRP
XR - ‘bamboo spine’
sclerosis, subchondral erosions and syndesmophytes and squaring of lumbar vertebrae
if XR normal but clinical suspicion remains - MRI
genetic tests for HLA-B27
CXR - apical fibrosis
spirometry - restrictive picture
Management of ankylosing spondylitis
first line = NSAIDs
If peripheral joint involvement = DMARD (sulphasalazine)
Encourage regular exercise and physio
What nerves are compressed in cauda Equina?
L1-S5
What are the causes of Cauda Equina?
central disc prolapse - L4/5 or L5/S1
others include - trauma, haematoma, infection, tumours
Presentation of Cauda Equina?
Lower back pain bilateral sciatica or progressive neuro deficit in limbs Decreased anal tone bowel/bladder incontinence saddle anathesia
Ix for Cauda Equina?
urgent MRI
Management for Cauda Equina?
surgical decompression
under neurosurgery
What are the complications of cauda equina?
bladder/bowel/sexual dysfunction
leg weakness
sensory impairment
What is herniated disc pulposus?
A condition characterised by lower limb pain resulting from spinal nerve compression
Causes of herniated disc pulposus?
herniated disc
vertebral body mets
back pain
unilateral leg pain - worse than back
worse on sitting, radiates to foot/toes
associated numbness and paresthesia
herniated disc pulposus
presentation of L1-L3 nerve roots affected in herniated disc pulposus involves…
pain from lower back radiating to hip or anterior thigh
reduced knee reflex
+ve femoral stretch - thigh pain
presentation of L4-S1 nerve roots affected in herniated disc pulposus involves….
pain radiates below the knee
Investigation for herniated disc pulposus
MRI diagnostic
Management for herniated disc pulposus?
analgesia - NSAIDs
physio
exercising
persistent symptoms - 4-6wks can refer for an MRI
What is spinal stenosis?
The narrowing of part of the spinal canal resulting in compression of the spinal cord and nerve roots
commonly lumbar spine affects, in 50-60s
Causes of spinal stenosis include?
congenital stenosis, degenerative changes, herniated discs, spinal fractures and tumours
insidious back pain,
paresthesia on ambulation and relieved when supine
Bilateral leg pain - often worse on standing and walking or leaning forward
normal pulse
lower extremity pain and numbness
spinal stenosis
spinal stenosis presenting with unilateral leg pain suggests?
unilateral foraminal stenosis
spinal stenosis presenting with bilateral leg pain suggests?
central or bilateral foraminal stenosis
Ix for spinal stenosis?
MRI
to r/o PAD - ABPI & angio
Management approach to spinal stenosis?
spinal specialist to recommend exercise, analgesia and physio
DDX for spinal stenosis
peripheral arterial disease
neuropathy
What is kyphosis?
‘hunchback’ - a curvature of the spine measuring 50 degrees or greater on an X-ray
often seen in those with osteoporosis and in the elderly
What is lordosis?
the inward curve of the lumbar spine
often seen in pregnancy
What is scoliosis?
a sideways curvature of the spine
treated dependent on the degree of scoliosis
<20° = exercise and monitor
21-45° = bracing
>45° = surgery
loss of cartilage under the patella
chondromalacia patella
chondromalacia patella presentation
pain in the knee - dull ache
aggravated by deep bending
hypermobile patella with significant crepitus = grinding sensation
Investigations
XR = bone to bone (patella and femur)
what is patellofemoral pain syndrome?
broad term for pain in and around the patella - chondromalacia patella is one of the causes
knee pain - worse on straightening the knee
associated swelling, stiffness
restricted ROM and locking
instability
hx of injury
Mechanism of injury = twisting leg
Meniscal tear/injury
What special tests can be done to test for meniscal injury?
Mc Murray’s
Apley grind tests
not in clinical practice due to causing pain and worsening the injury
What are Ottawa Knee rules?
used to determine if imaging warranted
- aged 55+
- isolated patella tenderness
- fibular head tenderness
- cannot flex knee to 90°
- cannot wait bear <4 steps
scoring any 1 of criterion warrants imaging
Ixs for meniscal injury
XR - if ottawa rules warrant
MRI scan - first line
arthroscopy - GOLD STANDARD (diagnosis and allows for therapeutic intervention)
management for meniscal injury?
Conservative - RICE protocol
NSAIDs - first line analgesia
Physio for rehab
Surgery - arthroscopy
loss of anterior/posterior stability
knee painful, swollen
Weight bearing can be difficult
‘pop’ heard during injury
+drawer tests
Cruciate ligament injury
What does mechanism of injury for ACT involve?
blow to the back of knee combined with rotation - often in sports
What does mechanism of injury for PCT involve?
anterior force - dashboard collision in RTA
How are cruciate ligament injuries investigated?
Conservative management - RICE
NSAIDs first line
physio - pre and post surgery
arthroscopic surgery
- if reconstruction required
- young, active patients
Pain, swelling and redness in knee - swelling prominent
difficult to kneel or walk
history of trauma
occupation or recreational activities involving repetitive or prolonged kneeling
pre-patellar bursitis
Causes of Pre-patella bursitis?
acute trauma
chronic trauma - repetitive pressure/overuse
gout or RA/SLE
Ix for pre-patellar bursitis?
bursal aspiration - rule out septic knee or crystal-induced bursitis
bloods - CRP, ESR, WCC, uric acid, blood glucose, ANA and RF
XR - if bony abnormality suspected
management of pre-patellar bursitis?
if confidently ruled out septic joint
- ICE, activity modification and simple analgesia
if not responsive to conservative measures - aspirate or steroid injection
Septic joint suspected = empirically treat with antibiotics (flucloxacillin 500mg QDS)
Single joint
hot painful erythematous swollen joint
restricted ROM
tender on palpation
may have hx of trauma, recent illness, IV drug user, STI
Septic joint
What are common organisms associated with septic joint
children - staph or strep
sexually active adults - Neisseria gonorrhoeae
Ix for septic joint
aspirate - gram stain and culture
contraindicated if prosthetic joint
Management of septic joint
IV Abx - vancomycin
what is acute osteomyelitis? what is the most common causative organism
infection of bone commonly caused by staph aureus
non-specific pain
fever
malaise
swelling around affected bone
acute osteomyelitis