14 results
Agents Causing Potential False-Positive Results With Urine Drug Screening 

#Urine #DrugScreens #UDS #Laboratory #Toxicology #Diagnosis #FalsePositive
Causing Potential False-Positive ... #DrugScreens #UDS ... Toxicology #Diagnosis #FalsePositive ... #Testing
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
that may cause false ... #DrugScreens #UDS ... Toxicology #Diagnosis #FalsePositive ... #Testing
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... Drug Screens (UDS ... #FalsePositives ... DrugScreening #UDS ... #Testing #Laboratory
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 ... #FOBT #Guaiac #FalsePositives
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculin skin testing ... (TST) False-negative ... microscopy • Testing ... recommended because false-negative ... #Diagnosis #Workup
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Galactomannan Testing ... Specificity and False ... not available in US ... Galactomannan #Fungal #Testing ... #FalsePositives
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Test Results False ... anticoagulant medication False ... #OccultBlood #Testing ... #Laboratory #FalsePositive
Hypereosinophilia Different Diagnosis and Workup
Secondary causes are broad so start with a med review, the most
Diagnosis and Workup ... common cause in the US ... inpatient setting ... Outside the US, ... Different #Diagnosis #Workup
Pancytopenia - Workup and Differential Diagnosis Algorithm
Consumption Disorders
 1. Autoimmune Mediated Pancytopenia
 2. Splenic Sequestration
Peripheral Destruction
Pancytopenia - Workup ... Eating disorders ... • Hypoplastic MDS ... #Pancytopenia #Workup
Pancytopenia - Workup and Differential Diagnosis Algorithm
Consumption Disorders
 1. Autoimmune Mediated Pancytopenia
 2. Splenic Sequestration
Peripheral Destruction
Pancytopenia - Workup ... Eating disorders ... • Hypoplastic MDS ... #Pancytopenia #Workup