Rheum2 Flashcards
(50 cards)
What is osteoporosis
Condition characterised by low BMD and microarchitectural deterioration of bone ==> Leads to bone fragility and increased fracture risk
What investigations should be ordered in Ank Spond?
AP Pelvis and lumbar spine Xray
FBE, UEC, LFT
CRP, ESR
HLAB27
What are the two diagnostic categories for AS?
Radiographic Axial Spa (sacro-illitis on xray or mri plus one other feature of SPa)
Non-Radiographic Axial Spa (2 clinical features plus HLA B27 positive - no radiographic evidence yet)
What is the treatment of Ank SPond?
- Smoking cessation
- Spinal stretching and ankylosing spondylitis specific exercise program
- Patient Education and awareness of disease progression and red flags (Eg uveitis symptoms)
- Oral NSAIDs (proven benefit)
- IF not improving - DMARDS -sulfasalazine and/or methotrexate
- TNF alfa inhibitors are second line (rheum prescription)
How does enteropathic arthritis present?
Its the most common extra-articular manifestation of IBD (20%)
Can get spinal enthesitis (sacroillitis) and peripheral - achilles/plantar fasc
just like ank spond clinically
But in extra-articular - can also get conjunctivitis/episcleritis AND the skin manifestations of IBD
Erythema nodosum - CHRONS
Pyoderma Gangrenosum - Ulcerative colitis
Management of enteropathic arthritis
NSAID - if tolerated because of gut issues
Steroid injections
Exercise
DMARD’s in refractory
Clinical features of psoriatic arthritis?
Usually a peripheral arthritis - can get dactylitis
- 50% peripheral arthritis affecting Up to 5 joints - starts oligoarticular but can become poly
- polyarticular peripheral - can resemble rheumatoid (30%)
- Predominant sacroillitis and spondylitis (10%)
- Predom DIP involvement ( 5%)
- arthritis mutilans (5%)- osetolysis! shortening of fingers and flail joints
Management of psoriatic arthritis?
1, NSAIDS - ibuprofen 400mg tds prn
- Corticosteroid injections
- DMARDS - methotrexate, sulfasalazine, leflunomide
What are the features of reactive arthritis?
Triad of peripheral arthritis, urethritis, conjunctivitis
- 1-2 weeks after infection with either CHLAMYDIA TRACHOMATIS
or shigella, camylobacter, salmonella, yersinia
- YOu need one or more of the triad and the typical history
- usualy 20’s -40’s
- Extra-articular - conjunctivitis, urethritis/prostatis/balanitis and Keratoderma Blenorrhagica (pustular hyperkeratosis to hands and feet).
ACUTE MX- oral NSAIDS
Corticosteroid injection
Prednisolone (10-50mg daily until symptoms improve - then taper dose and stop)
CHRONIC (20%)
exercise programs
NSAIDS
Corticosteroid injections
May need DMARDS
What’s the differential diagnosis for a monoarthritis?
- Crystal arthritis eg gout
- Septic arthritis
- Traumatic/Haemarthrosis
- Malignancy within joint
- Psoriatic/enteropathic/reactive arthritis can present as mono arthritis
Patient with widespread joint pain (everywhere)
fibromyalgia
What are the serum uric acid targets for patients with a) gout b)tophaceous gout?
- 36 mmol/L for gout
- 3 mmol/L for tophaceous gout
What is Gout?
Deposition of monosodium urate crystals in joints, tissues and kidneys
can present with acute or chronic joint disease
Nephrolithiasis
Chronic urate nephropathy (tubular interstitial nephritis)
Its managed with life long urate lowering therapy
Which foods are high in purines?
Red meat,
Offal
Shellfish
Alcoholic beverages
Sweetened soft drinks
How is uric acid made?
Made in liver from endogenous and dietary purines
Where is uric acid eliminated?
2/3 kidney
1/3 GIT
Which drugs inhibit uric acid excretion?
- Thiazide diuretics
- Loop diuretics
- Cyclosporin
What causes an acute attack of gout
Sudden change in uric acid levels - up or down
What are the risk factors for GOUT?
Hypertension
Dyslipidaemia
Diabetes
Obesity (increased endogenous insulin reduces uric acid b/down)
Ischaemic heart disease
Chronic kidney disease
(Basically all CV RF’s and kidney due to metabolic effect)
Differences in presentation between acute and chronic gout
acute - usually monoarticular - 1st MTP or other part of foot
Chronic - can be tophaceous - tophi usually occur at elbows, knees (causing bursitis) and in peripheral joints (fingers and toes)
Chronic tophaceous gout is DESTRUCTIVE and can cause significant disability
Investigations for gout?
definitive dx requires ID of monosodium urate crystals under polarised microscopy in synovial ( or bursal) fluid or tophi
Ix: Aspiration of joint with suspected acute gout - and microscopy for urate crystals
Serum uric acid
FBE, CRP, ESR
UEC - impaired RF is both risk factor and and consequence of gout
Management of acute gout?
Indomethacin 50mg TDS for 3-5 days
OR
Local Corticosteroid injection - up to two sites
OR
Prednisolone 15mg orally 3-5 days
OR
Colchicine 1mg stat followed by 500mcg at one hour
can then give 500mcg TDS for next few days to a maximum of 6mg in 4 days
Long term management of GOUT?
- Education regarding purine rich foods - give patient list of foods to avoid.
- Screen for metabolic syndrome - advise cardiovascular risk management and 150min/week of exercise
- Life long urate therapy - commence allopurinol at low dose 50mg/daily - increasing slowly every 4 weeks - titrate dose according to serum urate level (treat to target)
- 36 for gout
- 3 if tophi are present
If not starting allopurinol during acute flare - can start with flare prophylaxis.
Whats the dose of colchicine for flare prophylaxis?
500mcg orally daily for 6 months