7 results
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
false positive tests ... #DrugScreens #UDS ... #Laboratory #Toxicology ... #Diagnosis #FalsePositive ... #Testing
Agents Causing Potential False-Positive Results With Urine Drug Screening 

#Urine #DrugScreens #UDS #Laboratory #Toxicology #Diagnosis #FalsePositive
#DrugScreens #UDS ... #Laboratory #Toxicology ... #Diagnosis #FalsePositive ... #Testing
Echinococcal Cysts in the Liver- The physical examination revealed hepatomegaly with a palpable hepatic mass. Laboratory
Echinococcal Cysts ... Laboratory tests ... indicated an anti-echinococcus ... caused by the echinococcus ... liver #hepatic #radiology
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Drug Screens (UDS ... naproxen and modern tests ... #FalsePositives ... DrugScreening #UDS ... #Testing #Laboratory
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Fecal Occult Blood Test ... #OccultBlood #Testing ... #Laboratory #FalsePositive
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 ... not available in US ... the use of this test ... #FalsePositives ... #Laboratory #sensitivity
Vertebral Hydatidosis- Physical examination revealed impaired sensation in both legs and weak foot flexion. Laboratory tests
Laboratory tests ... ..Pathological testing ... assay identified Echinococcus ... Echinococcus is ... #clinical #radiology