Approach to a Single Painful Joint OW! It hurts!.
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Transcript of Approach to a Single Painful Joint OW! It hurts!.
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Approach to a Single Painful Joint
OW! It hurts!
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Monoarticular Causes• A. Septic (bacteria, fungus, parasite) ACK!!!• B. Trauma (meniscus, ligament, overuse, fracture,
hemarthrosis)• C. Crystal ( gout, pseudogout )• D. Neuropathy (Charcot )• E. AVN (ischemia)• F. RA• G. Lyme disease• H. Paget’s disease (osteitis deformans)• I. Neoplasms (osteoid osteoma, villonodular synovitis )
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History
• Onset? Trauma? Circumstances.
• Joint probs b4? (OA? Knee replacement?)
• Where? Migratory? Multiple?
• Extraarticular sympts?
• Sex/Drugs/Rock and Roll?
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Physical
• Inspection (SEADS)
• Palpation (milking, patellar tap)
• ROM
• Other joints
• Rest of body
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Labs and Tests
• Synovial Fluid
• CBC
• ESR
• ANA
• RF
• X ray bilat joints
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Management of the BIG 4
culturesIV Abx
irrigationhospitalization
> 50,000c/uLsynovial fluid
Infectious
ortho consultimmobilization
evidence on xrayhx agrees
Trauma
NSAIDSBUN lytes Cr
steroidscolchicine
birefringent onmicroscopy
Crystal
NSAIDSsteroids
rheum consult
bw results
Systemic
Monoarticular Pain
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Things to Remember
• Septic arthritis is a medical emergency: two potential complications are sepsis and osteomyelitis. Always rule out septic arthritis.
• Always tap a monoarthritis and send the synovial fluid for cell count, Gram stain, fluid culture, and crystals.
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The case of Mr. R• 82 yr old M w/PMHx of OA, A fib.• Fever, malaise, swollen painful R knee x 1/52,
cannot weight bear currently. No travel. Was found on the floor, says he “fell but couldn’t get up”. At baseline, pt has dementia but is physically active.
• O/E: hr 80ireg ireg, temp 37.9, pt is confused, ROM of R knee 10-80 degress with pain. R knee is swollen, red, tender. No obvious deformity.
• Lab: wbc is 14.8, uric acid 450uL (N: 90-360), INR 9 (Pt gets BW done regularly.)
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What could we do?
• Tell pt that they must go to the hospital.• Sepsis? Monitor vitals.• X ray both knees.• obtain BW and blood cultures• Urine culture and swabs if gonococcal cause
suspected• Tap the joint (to obtain fluid and to relieve pain).• Treat empirically with IVAbx until C+S comes
back.
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Empiric Abx Treatment
Ceftriaxone
Gonococcal
Vanco
Yes
Clox
No
Immunocompromised?
Gram +cocci
Amino glycoside3rd generation cephalosporin
Gram -bacilli
Ceftriaxone
Gram stain nil
InfectiousCause(adults)
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What did I see done ?
• CT head: N• X ray knees and CXR: N• BW repeated: same• Blood and urine cultures obtained.• IV Vanco + Ceftriaxone (?)• Morphine for pain. Warfarin stopped.• Tap was not done due to INR.• Dx: Hemarthrosis due to INR, R/O Septic Art.
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Lesson learned
• You should ALWAYS tap and obtain synovial fluid (no matter the INR).
• In this case < 50,000c/uL, G stain -, all cultures -, intracellular CPPD crystals identified on microscopy.
• Dx: Acute Pseudogout.• IVAbx stopped and corticosteroids injected
into knee. D/C with PT referral.
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References
• Cibere, J., “Acute Monoarthritis”, CMAJ, May 30, 2000; 162(11)
• Moses,S.,“Monoarticular Arthritis”, Family Practice Notebook.com, August 26, 2003
• The Washington Manual of Medical Therapeutics, chap. 24
• The Merck Manual 17th ed, chap 5, 13, 21• Sanford Guide to Antimicrobial Therapy