81 results
Gastrointestinal Evaluation of Iron Deficiency Anemia
In patients with anemia, diagnose iron deficiency if:
 • Ferritin <
• Additional laboratory ... tests may be needed ... chronic kidney tests ... Test for celiac ... if serology is positive
Thyroid Function Tests (TFTs) and Interpretation

 • TSH, Free T4, Free T3
 • T3 Uptake
 •
Thyroid Function Tests ... Thyroid #Function #Tests ... endocrinology #diagnosis #laboratory ... #patterns #differential
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
Can Cause False Positives ... on Drug Tests ... yielding false-positive ... on drug tests? ... #drug #tests #differential
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
Positive Hallpike ... test (posterior ... or supine roll test ... test Méniére's ... Vertigo #Algorithm #differential
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False Positives ... Rate of False Positives ... naproxen and modern tests ... result in false positives ... #UDS #Testing #Laboratory
Approach to a Positive (+) Rheumatoid Factor (RF)
(+) RF does not always = RA
Rheumatic disorders:
 •
Approach to a Positive ... #rheumatology #laboratory ... #differential #
SLICC SLE Diagnostic Criteria - Systemic Lupus Erythematosus
Clinical and Immunologic Criteria

CLINICAL CRITERIA
 - ACUTE CUTANEOUS LUPUS
ANA level above laboratory ... antibody level above laboratory ... determined by Positive ... test for lupus ... Direct Coombs’ test
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
antibody (ANA) test ... ; if positive, test ... - Positive in ... more time for the laboratory ... Rheumatoid #Arthritis #laboratory
Free fluid + empty uterus + positive pregnancy test = better start looking for a mass!
If
empty uterus + positive ... pregnancy test ... Pregnancy #Ultrasound #POCUS
Right Parasternal View on POCUS Echocardiogram
 - Right lateral decubitus position with transducer at 2nd/3rd Intercostal
Parasternal View on POCUS ... Echocardiogram ... lateral decubitus position ... #window #view #POCUS ... #Echocardiogram