22 results
Approach to a Positive (+) Rheumatoid Factor (RF)
(+) RF does not always = RA
Rheumatic disorders:
 •
Rheumatoid Factor (RF ... ) (+) RF does not ... Rheumatoid #Factor #RF
Rheumatoid Arthritis - 2020 ACR-EULAR Classification
≥ 6 of 10 points = definite RA
Joint Involvement:
): Negative RF ... Low positive RF ... High positive RF
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
arthritis SLE, , RF
Subtypes of Serum Proteins

Pre-albumin (Transthyretin)
Albumin
Globulins
 • Alpha-1: Alpha-1 antitrypsin, Serum amyloid A, Ceruloplasmin, Corticosteroid-binding globulin (Transcortin),
IgM, IgG, IgA, RF
Rheumatoid Arthritis Summary
Overview: chronic, inflammatory symmetric polyarthritis involving small joints of hands/feet, knees, shoulders
Signs & Symptoms:
Laboratory Studies • RF ... specificity than RF
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
Rheumatoid factor (RF ... antibody • ANAs RF ... specificity than the RF ... level • ANAs • RF ... myeloma) • ANA and RF
Cryoglobulinemia Classification Types

Type 1: Monoclonal IgM (rarely IgG/lgA)
 • Raynaud phenomenon, Digital ulcers/gangrene, Livedo reticularis, Hyperviscosity
Monoclonal IgM (RF
Rheumatic Fever - Jones Criteria
An autoimmune condition. Peak incidence is 5-15 yrs of age.
Triggered by infection
Rheumatic #Fever #RF
Autoantibodies in Rheumatology
 • Lupus (SLE): ANA (anti-nuclear antibody), dsDNA (double-stranded DNA), Anti-Smith, Anti-Ro (SSA) and
Rheumatoid Factor (RF
How-to Calculate the Filtration Fraction (FF) in CKRT
 • The FF is the ratio of fluid
/ (Pre-Filter RF