MSK Flashcards
What indicators are there of an inflammatory condition?
- Morning stiffnes > 30 mins - Pain after rest - Systemic symptoms - Night time pain - Acute/ subacute presentation
What indicators are there of a non-inflammatory condition?
- Pain towards end of day - Pain better at night - Long standing/ chronic nature
What steps are there in interpretation of a joint X-ray?
Details Site Type of fracture - transverse, oblique, spiral Simple of Comminute Displaced Angulated Consistency of bone
What indicators are there of Oesteoathritis on joint X-rays?
LOSS Loss of joint space Osteophytes Subchondral cysts Subchondral sclerosis
What would a joint aspiration show if a patient had gout?
- needle like, negatively bifringent in polar light crystals of monosodium urate
What would a joint aspiration show if a patient had pseudogout?
Rhomboid and parallelogram shaped crystals which are positvely bifringent to polarised light and made of calcium pyrophosphate crystals
Apart from Pseudo/Gout, what else can a joint aspiration be used for?
Gram stain and culture for septic arthritis
What antibodies are used for rheumatoid arthritis?
Rheumatoid factor Anti-CCP (more sensitive)
What might Anti-ds DNA suggest?
SLE
What anti-bodies indicate sjogrens disease?
Anti- LA Anti- Ro Also present in SLE
What auto-antibodies work in polymyositis dermatomyostitis?
Anti-Jo1 Anti-Mi2
What does anti Scl-70 indicate?
Systemic sclerosis
What ANCA is present in Granulomatosis and polyangitis?
c-ANCA
What ANCA is present in Churg-Strause?
This is Eosinophilic granulomatosis and polyangitis. p-ANCA is present
What is the True positive rate (Sensitivity)?
TP/(TP+FN) - ability of a test to rule in or detect the disease
What is the True negative rate (specificity)?
TN/(TN+FP) - ability of a test to rule out or exclude the disease
What should be considered when giving steroids?
PPI Vit D Biphosphonates
What side effects are there to steroids?
• Myopathy – muscle wasting • Osteonecrosis • HPA axis dysunction • DM, fluid retention, lipogenesis • Gastric ulcer • Hirtuism • Skin thinning • Catarcts • Increased cardiovascular risk
What DMARDs are there?
Aziothioprine Methotrexate Sulfalazine Hydrochloroquine Leflonomide
What is the definition of a pathological fracture?
A fracture in abnormal bone (metabolic, metastatic, infected, osteopenic or osteomalacia)
What principles are there for management of a fracture?
Reduce - approximate anatomically the broken tissues Immobilise - Casts, surgical stabilisation Rehabilitate - physio
What systemic factors can cause a delay in bone union?
poor blood supply like that of scaphoid, distal tibia, stability and infection
What local factors can cause a delay in bone union?
diet, DM, smoking (big time), HIV and medication (corticosteroids and NSAIDS)
What nerve palsy is associated with a Midshaft of the humerus fracture?
Radial nerve
What nerve palsy is associated with a Fibular neck fracture?
Common peroneal fracture
What nerve palsy is associated with a Supracondylar humeral fracture?
Median nerve
What nerve palsy is associated with a shoulder dislocation?
Axillary nerve - deltoid, teres minor and some of the triceps
What nerve palsy is associated with a Hip disclocation?
Sciatic nerve
What is the definition of osteoporosis?
Bone mineral density that lies 2.5 SD away from average for a normal person when accounting for age, race and sex
What investigation might be considered for rheumatoid arthritis?
- Base line bloods – FBC, LFT, U&E - Inflammatory markers - TFTs - Immunology -RF, anti-CCP, ANCA - X-ray hands and feet
What is the NICE criterial for referral for rheumatoid arthritis?
- Persistant synovitis - Urgent o Small joints of hand and feet are effected o More than one joint is effected o Delay of >3m between onset of symptoms and seeking medical advice
What conservative treatment is there for osteoarthritis?
o Patient education o Weight loss o Exercise and physiotherapy
What medical treatment is there fore oesteoathritis?
Analgesia - according to WHO Inter-articular steroid injections
What DD are there for a swollen joint?
- Septic arthritis - Gout - Pseudogout - Haemarthrosis - Psoriatic arthritis - Reactive arthritis
What RF are there for gout?
- Male - Alcohol intake - High purine intake – steak, oily fish and marmite - Diuretics - Overweight - Metabolic syndrome – DM, HTN ‘
What condition should be excluded before a diagnosis of gout can be made?
Septic arthritis
What is the management of acute gout?
- Analgesia - NSAIDS 2. Cholchicine - within 12 hours 3. Steroids
When should allopurinol be started?
o >2 attacks o Trophi identified (urate deposites) o CKD stage II o Urolithiasis
What is are the common side effects to allopurinol?
Hypersensitivity Rash Increased risk of acute gout attack in first 6m of treatment
What is an alternative to allupurinol?
Febuxostat
Long term management of patient who has suffered from attacks of gout?
Lifestyle - decrease alcohol, decrease diet of fish oil, marmite. Medical - start urate lowering drug like allupurinol
When should a urate lowering therapy like allopurinol be started after an attack of gout?
Start 2-4 weeks post acute attack
What steps are needed to interpretate a joint XRAY?
- Details - Site - Type of fracture - Simple or communicated - Displaced - Angulated - Bone consistency
What is communicated fracture?
break or splinter into more than two fragments
In a patient controlled analgesia what is lockout time?
That after patient give themselves more analgesia another dose will not be given for a give amount of time.
Patient has pain in calf after surgery which is resistant to analgesia. MLD?
Compartment syndrome
How is compartment syndrome managed?
- position limb below level of the heart. - Release dressing - Emergency fasciotomy
What factors might slow a fracture from healing
smoking arterial supply - 5metacarpal, scaphoid DM Meds -steroids, NSAIDS diet smoking
What is nerve is at risk with a hip dislocation?
sciatic
What is nerve is at risk with a shoulder dislocation?
axillary
What is nerve is at risk with a supracondylar fracture of the humerus?
Median nerve
What is nerve is at risk with a fibular fracture?
Common perineal nerve
What is nerve is at risk with a mid shaft fracture of the humerus?
radial nerve
What is the definition of the osteoporosis?
BMD of 2.5 sd below the normal for a young person of a comparable rase and sex
What is a highly sensitive clinical test to diagnose compartment syndrome?
Pain on passive stretch