Rheum 1 (OA, Gout, Pseudogout, Fibromyalgia) Flashcards

1
Q

Describe the pathogenesis of OA

A
  1. Cartilage loss
  2. Disease of the bone (changes in biomechanics and age)
  3. Inflammation and immunologic (swelling and stiffness)
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2
Q

Types of OA

A
  1. Idiopathic, primary
    - Localized: hands, feet, hips, knees, spine
    - Generalized (3+ joint sites)
  2. Secondary– Areas that you would not except OA due to mechanics alone
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3
Q

Secondary causes of OA

A
  1. Trauma
  2. CPPD (pseudogout)
  3. RA
  4. Gout
  5. DM
  6. Hypothyroidism
  7. Congenital (Hips)
  8. Neuromuscular dz (DM)

**usually asymmetric involvment

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4
Q

Risk Factors for OA

A
  1. Sex: F>M
  2. Age: >45
  3. Obesity
  4. Hereditary
  5. HX of trauma
  6. Metabolic disorders (DM, CPPD)
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5
Q

Defining features of gout

A
  1. Deposition of monosodium urate (MSU) crystals in joint, bone and soft tissue
  2. MSU crystals are NEEDLE shaped
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6
Q

Types of Gout

A
  1. Asymptomatic hyperuricemia
    - All pts w/ gout have hyperuricema but not all hyperuricemas are due to gout
  2. Acute gout –> acute arthritis
  3. Interval (”Intercritical”) gout (cycles)
  4. Chronic gout leads to tophaceous gout
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7
Q

Causes of hyperuricemia that leads to gout

A
  1. overproduction of uric acid–> can cause stones

2. underexcretion of uric acid

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8
Q

Risk factors for gout

A
  1. Trauma or surgery (increase inflammatory response)
  2. Anorexia
  3. Diet (beer, organ meats, shellfish, asparagus, spinach, beans, mushrooms)
  4. Meds (thiazides or loop and allopurinol)
  5. Men and postmeno women
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9
Q

Defining features of pseudogout

A
  1. Deposition of calcium pyrophosphate dihydrate (CPPD) crystals in connective tissues
  2. Rhomboid shaped
  3. Acute attacks induce synovitis
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10
Q

Risk factors for pseudogout

A
  1. Idiopathic
  2. Joint trauma
  3. Surgery
  4. Familial chondrocalcinosis
  5. Hemochromatosis
  6. Hyperparathyroidism (excess Ca2+)
  7. Avg. age 72
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11
Q

Diagnosis of OA is based on the combination of:

A
  1. age
  2. HX
  3. PE Findings
  4. Xray findings

**No labs tell you its OA

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12
Q

Key features of OA

A
  1. OA does not affect all joints equally (asymmetric)
  2. MC joints: Knees, hips, hands, cervical and lumbar spine
  3. LC joints: Elbows, ankles, wrists

Get good Hx (likely secondary to trauma)

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13
Q

Symptoms of OA

A
  1. Pain with use; improvement with rest
  2. Morning stiffness <30 minutes
  3. Decreased range of motion
  4. Lack of systemic symptoms
  5. Stiffness after prolonged immobility (gelling)
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14
Q

PE findings of OA

A
  1. Localized tenderness to the joint
  2. Bony enlargement
  3. Crepitus
  4. Patella femoral pain
  5. Restricted range of motion
  6. +/- Swelling
  7. specific joint signs
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15
Q
What are specific joint signs for OA in:
Hands
Knees
Toes
Spine
A
  1. Hands: Heberden’s and Bouchard’s nodes
    - shelf sign at 1st CMC joint
  2. Knees: genu varum/valgum
  3. Toes: hallux valgus
  4. Spine: C and L decreased ROM
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16
Q

Herberden Nodes affect ___ joint where as Bouchard’s nodes affect __ joint

A

H: DIPs
B: PIPs

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17
Q

Sx of acute gout arthritis attack

A
  1. SEVERE pain
  2. Redness/swelling in a joint
  3. involves 1st MTP (podagra)- can be in others
  4. Abrupt onset (during night or early morning)
  5. Max sx reached w/in 12-24 hrs
  6. sx resolve in few day sto several weeks - quicker if txed
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18
Q

PE signs of acute gout arthritis attack

A
  1. Edema
  2. erythema/warmth
  3. VERY TENDER
  4. May extend beyond the joint and mimic cellulitis
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19
Q

Describe gout intervals (intercritical)

A

“Between attacks”

Occurs with resolution of the acute attack

If untreated:

  1. Next episode usually occurs within two years
  2. Usually more prolonged, less intervals between flares, more severe
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20
Q

What is Chronic tophaceous

A

Collection of MSU crystals surrounded by grandulomatous inflammation
-develop w/in 10 yrs after onset of gout

*prevented by txing gout

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21
Q

Sx of chronic tophaceous

A
  1. Can come out of the skin and expel a white, chalky material
  2. typically NOT painful
  3. found in joint and skin
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22
Q

Sx of pseudogout

A
  1. mimics gout but less painful** and takes longer to reach intensity
  2. MC Joints: knees, triangular fibrocartilage of wrist
  3. can be seen in elbows, shoulders, ligaments, tendons, bursa
  4. acute attacks of synovitis
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23
Q

PE signs of pseudogout

A
  1. Redness/ warmth,
  2. swelling
  3. limited range of motion and
  4. tenderness in affected joint
  5. Looks like cellulitis!
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24
Q

What lab findings do you get with OA

A
  • No specific test used for diagnosis
    1. Can get WEIGHT BEARING X-rays (hip, ankles, knees)
    **
    2. Lab tests used to rule-out secondary causes of OA (Involve a rheumatologist!)
    3. +/- Synovial fluid
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25
Q

What does synovial fluid analysis look like for OA?

A
  1. Normal viscosity, glucose
  2. Minimal elevated WBCs (<2000/mm3)
  3. Negative culture
  4. Negative crystals

Normal cell count, culture. No crystals

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26
Q

Common Xray findings w/ OA

A
  1. Joint space narrowing
  2. Osteophytes
  3. Subchondral cysts
  4. Subchondral sclerosis
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27
Q

If you see chondrocalcinosis think

A

Pseudogout

*may be causing secondary OA

28
Q

articular cartilage calcification should raise the suspicion of a secondary cause __

A

pseudogout

29
Q

What labs do you initially order in the evaluation of gout

A
  1. CBC
  2. CMP
  3. TSH
  4. Lipids
  5. UA
  6. 24 hr urine creatinine and Uric acid
  7. Joint aspiration is definitive DX

*Don’t use labs by itself to dx gout (not definitive dx–> need aspiration)

30
Q

What are the definitions of hyperuricemia in females and males

A

Uric acid >6.0 mg/dl in females
Uric acid >7.0 mg/dl in males

*Urate value may be normal or low (12-43% of patients) during an acute flare
(Hyperuricemia can be present in asymptomatic patients

31
Q

What does synovial fluid look like for gout?

A

Visualization of fluid under polarized light microscopy

  1. Negatively birefringent crystals
  2. Needle-shaped
  3. High WBCs; >80% PMNs
32
Q

Xray findings w/ gout

A
  1. Soft tissue swelling
  2. Tophi
  3. Bony erosions –> “punched out” with overhanging edges
  4. Rat bite erosions***

*Obtain with new diagnosis, worsening symptoms or new patient to you

33
Q

Risk factors for kidney stones w/ gout

A
  1. Increased excretion of uric acid
  2. Decrease urine volume (allowing the uric acid to build up)
  3. Low urine pH

**Need the pt to strain their urine and get the composition of the stone so you know what to tx it with

34
Q

What labs do you order w/ pseudogout

A
  1. Ca2+
  2. phosphate
  3. magneisum
  4. Alkaline phosphate
  5. ferritin
  6. iron
  7. transferrin
  8. TSH
  9. Joint aspiration is definitve!
35
Q

What does the synovial fluid look like for pseudogout

A
  1. Weakly positively birefringent crystals
  2. Rhomboid or rectangular

Gout: Negative, Needles
Pseudogout: Positive

36
Q

Xray findings with pseudogout

A

Chondrocalcinosis
Radiographic evidence of calcium crystal deposition in cartilage commonly seen in patients with CPPD but is not absolutely specific for CPPD

Appear as linear radiodensity in cartilage

37
Q

Non-pharmacologc Tx of OA

A
  1. Patient Education!!–> cannot stop progression but can slow it down
  2. Modifications
  3. Weight loss!!
  4. Weight-bearing canes
  5. Assistive devices (higher toilet seats, door handles, finger grips)
  6. Footwear (might need to get them in orthotics)
  7. PT and
  8. Progressive Exercise
38
Q

What are the ACR guidelines for knee OA tx

A
  1. Nonpharm. measures
  2. Acetaminophen (topical iceyhot or intra-articular tx)
  3. NSAIDs, COX2 inhibitors
  4. nonselective NSAIDS _ misprostol or PPI
  5. Nonacetylated salicylates
  6. pure analgesics
39
Q

1st Line treatment for OA
Peak concentrations  30-60 minutes
No specific precautions in the elderly

A

Acetaminophen

*Severe liver disease can affect metabolism
Watch for products containing acetaminophen (Vicodin, Percocet, Darvocet, Ultracet)

40
Q

what are intra-articular agents for OA

A
  1. Corticosteroids
  2. Hyaluronate/ viscosupplement

**make sure it is not septic before injecting

41
Q

Describe different COX meds for OA

A
  1. COX1 specific: LD ASA
  2. COX NS: ibuprofen, naproxin, indomethacin
  3. COX2 preferential: Etodolac, diclofenca (less $ than COX2 specific)
  4. COX2 specific: Celecoxib– Can use 1st line if documented GI bleed or on warfarin
42
Q

SE of NSAIDs/COXIBs

A
  1. GI
  2. kidney and liver
  3. rash
  4. CV
  5. Tinniuts
  6. DDI (warfarin)
43
Q

Opioids used for OA

A
  1. Oxycodone
  2. Codeine

*Use after other interventions tried and failed
Contract your patients
Monitor with pain level and function

44
Q

Alternative therapies for OA

A
  1. Glucosamine sulfate

2. Chondrontin sulfate

45
Q

When do you send for surgery for OA

A
  1. Severe pain that:
    - Awakens the patient at night
    - Prevents standing for >20-30 minutes
  2. Loss of joint function:
    - Cannot walk more than one block
    - Had to change ADLs due to inabilities

Prognosis: 1/3 get better, 1/3 stay the same, 1/3 get worse

46
Q

TX of acute gout attack

A
  1. NSAIDS–> 1st line
    Naproxen 500 mg BID
    Indomethacin 50 mg TID
  2. Colchicine 0.6mg TID best if used in 1st 24 hrs
  3. GCs- local injectio or systemic prednisone
47
Q

Biggest SE of cholchicine

A

diarrhea and vomiting

*start in a low does and titrate up to help reduce diarrhea

48
Q

Prophylactic meds for Gout

A

*Do not start these medication until you have complete resolution of the attack

  1. Anti-hyperuricemic therapy
    - Allopurinol 300 mg daily – xanthine oxidase inhibitor
    - Febuxostat 40-80 mg daily – xanthine oxidase inhibitor (For over producers)
    - Probenecid 250 mg BID – uricosuric drug (For under producers)

*Uric acid level monitoring with therapy

49
Q

How do you monitor uric acid level with gout prophylactic tx

A

*Recommendation is baseline and recheck 2 weeks after starting therapy
(Most present during an acute attack with normal uric acid level)

-Other option: Get a baseline level after the flare and recheck level 4-6 weeks after therapy; adjust dose and recheck. Once level is <6.0, check on with annual physical or prn to check compliance

50
Q

Tx goal for gout

A
  1. Serum urate concentration of <6.0 mg/dl (lower the serum urate concentration slowly)
  2. if tophi present: serum urate concentration of <5.0mg/dl
51
Q

Tx of acute pseudgout attack

A
  1. NSAIDs
    - Indomethacin 50 mg TID to QID for 1-2 days; taper
  2. Colchicine
  3. Intraarticular glucocorticoid
  4. Systemic glucocorticoid

*tx underlying cause if present (hypothyroidism, hemochromotosis, idiopathic)

52
Q

Prophylaxis tx for pseudogout

A

(>3 attacks/year)

Colchicine 0.6 mg BID

53
Q

Definition of Fibromyalgia

A

chronic widespread pain disorder for >3 months

54
Q

Most common cause of generalized musculoskeletal pain in women 20-55 years of age
6 times more common in women

A

Fibromyalgia

55
Q

Describe triggers for fibromyalgia

A

(unknown etiology)

  1. physical and emtional stress
  2. infections
  3. trauma
  4. illness
  5. mood
  6. sleep
  7. possible genetic component
56
Q

Alterations in pain and sensory processing in the CNS
“Central Sensitization”**
Increased neurological changes

A

fibromyalgia

Initially thought of as a muscle disease
No evidence of abnormalities
Muscle pain is due to inactivity and pain

57
Q

Sx of fibromyalgia

A

**MOST ROS ARE POSITIVE
1. Fatigue
2. widespread MSK pain (pt reports swelling but none present)
3. Chronic, persistent pain w/ varying intensity
4. Pain is worse w/ stress, exertion, weather change
Associated symptoms
5. Tingling/numbness
6. burning
7. Dizziness,
8. weakness,
9. poor balance,
10. palpations,
11. night sweats,
12. headaches
13. Multiple medication intolerances

58
Q

What labs should you order w/ fibromyalgia?

A
  1. CBC- anemia
  2. ESR
  3. Creatinine
  4. TSH
  5. Glucose
  6. Ca2+
  7. phsophorous
  8. Creatine kinase
  9. UA

**All will be normal

59
Q

How do you dx fibromylagia

A

based on the following 3 criteria being met:

  1. Chronic (>3 months)
  2. Widespread MSK pain with no disorder that would otherwise explain the pain
  3. Widespread Pain Index >7 and Symptom Severity Scale >5 OR Widespread Pain Index 3-6 and Symptom Severity Scale >9

*11/18 tender points (are not required based on the new 2011 ACR Criteria)

60
Q

Describe the widespread pain index (WPI) for fibromyalgia

A

Note the number areas in which the patient has had pain over the last week (1 point each – max of 19)

*need at least 7 for dx

**MIDDLE of forehead is NOT one!

61
Q

Describe the symptom severity scale (SSS) for fibromyalgia

A

the sum of the severity of the 3 symptoms plus the severity of the somatic symptoms in general. Score is between 0-12 (Need at least 5)

For each of the 3 symptoms level, indicate the severity over the past week using the scale below:
Fatigue (0-3)
Waking unrefreshed (0-3)
Cognitive symptoms (0-3)

0= no problem
1= slight or mild problem/intermittent
2= moderate, considerable problem
3= severe, pervasive, continuous, life disturbing
62
Q

PE signs of fibromyalgia

A
  1. No tissue inflammation or swelling
  2. 11/18 tender points (bilateral and symmetrical)
  • Push hard enough to make the red of your finger tips white
  • Look for malingering: push on middle of forehead and inside of forearms
63
Q

Describe the pt education for fibromyalgia

A
  1. Real illness–> “not in your head”
  2. Is not life-threatening
  3. Does not lead to deformities
  4. Relationship of neurohormones to fatigue, mood, sleep and pain perception is the basis of treatment–> don’t use narcotics
64
Q

Tx of fibromyalgia

A
  1. Treat underlying cause in addition to pain

2. Sleep, Mood, Connective Tissue Disease, leg cramps (take Vt. D), restless leg (check for Fe def.

65
Q

Describe the multidisciplinary tx approach to fibromyalgia

A
  1. Pharmacologic agents
  2. Psychological: CBT
  3. PT: CV exercise*, heat and message
66
Q

What pharmacological agents can be used for fibromyalgia

A
  1. Antidepressants: tricyclic, SSRIs, SNRIs, Wellbutrin
  2. Tramadol-acetaminophen
  3. Anticonvulsants
    - Pregabalin (1st medication approved for fibromyalgia)
    - Gabapentin/neurontin
    - Lyrica- $$
  4. Trazadone for sleep and mood
  5. Flexoril for muscle pain and sleep
67
Q

Compare the systemic sx of fibromyalgia and chronic fatigue

A

Fibro: NO findings despite sx, 1/18 tender pts

CF: 4+ sx–> short term memory loss; sore throat; lymph nodes in axillae or neck; joint pain without swelling; muscle pain; unrefreshed sleep; headaches; malaise >24 hours after exercise
**Actual PE Findings