March 11 lecture Flashcards
Does Ra happen to everyone?
What are the stats on OA, RA, gout and alkyl. spond.
Despite the prevalence, what is a key fact about arthritis?
Yes, 2/3 ppl over 65 get the disease. 1/10 have OA 1/30 have Gout 1/100 have RA 0.5-1 in 100 have ankloysing spon.
- that if you Rx it early you can stop a lot of the disease
1) when Ax for RA what are some key points to remember in making a diagnosis
- labs do not = diagnosis Hx and physical exam do
* age; sex; race; Fx; presentation (febrile, acute, chronic, or widespread)
What are key questions to consider when screening Ra
1) R there red flags
2) intra vs peri articular inflammation
3) inflam vs non-inflam
4) focal (3jts)
5) acute (6wks)
RF = rehumatoid factor more severe in ppl with RA sensitivity
What are 4 Red Flags you must consider when ax for Ra, what action do you take with them (FSMN)
1) Fracture 2) Septic Arthritis (infec in jt. severe condition b/c it can cause jt damge) 3) malignancy 4) neurological signs and symptoms (focal/diffused muscle weakness; turning, numbness, parasthesia)
* These may present like Ra but require immediate referral or additional apts to rule them out
What are the 7 differences between Inflammatory conditions and Non-inflam conditions
(KNOW THIS SLIDE)
Feature Inflam conditoin non inflam condition
Pain Yes (morning) Yes (after use)
Swelling mod to severe Mild
Erthema Sometimes absent
Warmth Sometimes absent
Morning stiffness Yes > 1hrs <30min
Systemic features sometimes absent
Increse ESR * Frequent uncommon
Examples RA OA
** Erthrocyte sedimentation rate
Once you know if there is an inflame condition or not what is the next step?
You need to determine if the swelling is articular or periarticular
What is the difference between articular and periarticular swelling
Articular swelling: deep diffuse pain; pain w. A/PROM all planes; swelling is common
Periarticular: localized tenderness (bursitis, tendinitis); P. w. movt only in active few planes; swelling is uncommon
What is the Ax algorithm for Ra?
MSK condition
RED FLAGS
YES NO
Immediate Rx/Dx is this Articular condt?
(#, Septic arth; Cancer; Neuro)
YES (articular) NO (pericart)
Is jt inflamed? Non-articular condt.
(septic arth; gout; RA; PS) (bursit; enthesitis; polymyositis)
YES NO
>3jts Suspect OA
What are some inflammatory and non-inflammatory non-articular conditions
Inflammatory: bursitis; enthesitis; polymyositis
Non-inflamm: Fibromyalgia; #; carpal tunnel
What is RA and what does it cause?
Autoimmune disease
Synovitis (inflam of synovial membrane)
- hyperplasia
- increased vascularity
- infiltration of inflam cells = production fo enzymes that causes inflam (cytokine and TNF)
- Articular damage caused by pannus (layer of fibrovascular tissue or granulation tissue)
-
RA is only minor aches and pains and never happens in womenF!
NO it can be serious health problem if untreated
- no women > men (about 1%)
- usually 35-50 yrs (presentation more severe in first nations)
-
What happens at the joint in RA?
- immun factors cause synovium to swell cells proliferate
- pannus (dense articular membrane) spread over articular cartilage and erodes underlying cartilage and bone
- pannus normally on one side can extend to other side too causing fibrous scar tissue or adhesions or analysis
- bone = osteopenic
- ligaments /tendons = damaged or rupture
- muscles around jt decrease leaving unstable
What is the most common autoantibody in RA
HLA-DR4 (80%) cases
Could you use RF as a diagnostic indicator for RA?
No, its present in most ppl
- -ve RF W. clinical symptoms = Senonegative arthritis (30%)pt.s
- use it as a confirmatory agent NOT diagnostic
What other conditions does RF present with?
lupus, mixed connective tissue disease, syphillis, chronic hepatitis, PFribrosis