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

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
Urine Drug Screens ... 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
False-Positive Results With Urine ... Screening #Urine ... 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,
False Positives on Urine ... naproxen and modern tests ... #FalsePositives ... #UDS #Testing # ... Laboratory #diagnosis
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
- CCP antibody testing ... more time for the laboratory ... and C serology testing ... • Serum and urine ... Rheumatoid #Arthritis #laboratory
Acute Mesenteric Ischemia - Performance of 
Laboratory Tests (Sensitivity, Specificity) 
- WBC, Lactate, D-dimer, Urine I-FABP

#Mesenteric
Performance of Laboratory ... Tests (Sensitivity ... Lactate, D-dimer, Urine ... Ischemia #AMI #Testing ... #Diagnosis #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 ... the use of this test ... Galactomannan #Fungal #Testing ... #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