315 results
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
intermediate risk of disease ... Tuberculin skin testing ... (TST) False-negative ... microscopy • Testing ... recommended because false-negative
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
Fecal Occult Blood Testing ... evaluation • False ... cauliflower, ETOH • False ... to unnecessary testing ... #OccultBlood #Testing
1,3 Beta-D-Glucan and Galactomannan - Pathogens, and Testing Characteristics
1,3 ß-D-glucan:
 • Most fungi excluding mucor and
Pathogens, and Testing ... and pneumocystis False ... other fungi • False ... Galactomannan #Pathogens #Testing
Causes of False Elevation and Reduction in HbA1c

== False Elevation ==
Decreased RBC turnover 
• Iron, B-12,
Causes of False ... in HbA1c == False ... Transfusions == False ... End-stage renal disease ... Transfusions #False
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... NSAlDs resulting in false-positive ... not result in false ... DrugScreening #UDS #Testing
False Positive Lung Point on POCUS
Lung-Cardiac Point and Lung-Diaphragm Point
These images highlight selected differentials to pleural
False Positive Lung ... Point on POCUS ... UAlberta_Sono #False ... #LungPoint #POCUS
Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
Sensitivity Specificity False-Positive ... False-Negative ... not to have the disease
Pulmonary Function Testing (PFT) Interpretation Algorithm

Restrictive Lung Disease:
 • Chest wall or neuromuscular disorders
 • Interstitial
Pulmonary Function Testing ... Restrictive Lung Disease ... Interstitial lung disease ... Mixed Lung Disease ... Pulmonary #Function #Testing
"Recommended laboratory HIV testing algorithm for serum or plasma specimens. Based on: Centers for Disease Control
laboratory HIV testing ... on: Centers for Disease ... Laboratory Testing ... Empendium #Testing
Hemothorax - Thoracic ultrasound in trauma
False positive for consolidated lung- organized clot in pleural space after
ultrasound in trauma False ... hemorrhagic #clinical #pocus