25 results
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculosis Testing ... • History of BCG ... immunocompromised (e.g ... negative NAAT result cannot ... #Diagnosis #Workup
Torsades de Pointes
• "Twisting of the pointes" 
• QRS axis swings from positive to negative direction
de Pointes • "Twisting ... axis swings from positive ... TorsadesDePointes #Diagnosis #Cardiology ... #ECG #EKG
The head impulse test (HIT) result is positive (abnormal) in nearly all patients with a peripheral
HIT) result is positive ... It cannot therefore ... #PhysicalExam #Neurology ... #HeadImpulse #Testing
Gastrointestinal Evaluation of Iron Deficiency Anemia
In patients with anemia, diagnose iron deficiency if:
 • Ferritin <
celiac disease with serology ... biopsy only if serology ... is positive Bidirectional ... Non-invasive testing ... Gastrointestinal #Evaluation #workup
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
present on repeat testing ... including overnight testing ... Glomerular Proteinuria (Positive ... Protein deposition (eg ... #Proteinuria #Nephrology
Timeline for Progression of T2WI and DWI Findings in Acute Stroke
 - In the acute phase
DWI is already positive ... infarction will be positive ... - ADC will be of ... Progression #Timeline #Neurology ... #Radiology #Findings
Diagnosing Brucellosis
Epidemiological Exposures
- Endemic Regions
- Clinical Micro Lab Technicians
- Animal/Vaccine Exposure: Vets, Slaughterhouse workers, hunters
- Unpasteurized
Transaminitis - Radiology ... , Convalescent Serology ... Diagnosis #Criteria #Workup ... #Testing
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
Diagnosis and Workup ... smear, HIV/HCV testing ... function test, ANA (e.g ... (CVID, WAS), (neurologic ... Diagnosis #Causes #Workup
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
Rheumatology Workup ... (ANA) test; if positive ... - Positive in ... Chemistry profile (e.g ... Arthritis #laboratory #workup
Stiff Person Syndrome (SPS) - Diagnosis and Management Summary

Epidemiology:
 • Prevalence: 1-2 cases per million -
disorders • Testing ... anti-GAD (positive ... testing Lab ... antibody that works ... Management #treatment #neurology