29 results
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
levofloxacin, ofloxacin, poppy ... seeds, poppy oil ... naproxen and modern tests ... #FalsePositives ... DrugScreening #UDS #Testing
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
Fecal Occult Blood Testing ... immunochemical test ... to unnecessary testing ... #OccultBlood #Testing ... #FOBT #Guaiac #FalsePositives
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
false positive tests ... Toxicology #Diagnosis #FalsePositive ... #Testing
Froment’s Test for Ulnar Nerve Palsy

This tests for pinch grip weakness caused by ulnar nerve palsy,
Froment’s Test for ... Palsy This tests ... ulnar nerve palsy, testing ... Froments #Sign #Test ... Palsy #clinical #video
Pronator Drift (Pyramidal Drift) on Physical Exam

Testing showed pronator drift on the left side in this
Physical Exam Testing ... the 50-second test ... PhysicalExam #clinical #video
Yergason's Test on Physical Exam
Yergason's test for biceps tendon pathology testing stability of the tendon within
Yergason's Test ... Exam Yergason's test ... tendon pathology testing ... popping/pain is +test ... PhysicalExam #clinical #video
Ocular Myasthenia Gravis on Physical Exam

A 41yo female was referred by her neurologist for double vision.
In-office testing ... and the ice pack test ... include a Tensilon test ... PhysicalExam #clinical #video
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
Parkinson's Disease Tremor
The tremor of Parkinson's disease is characteristic. It is called resting tremor, that is,
It is called resting ... still, either at rest ... #Parkinsonian #resting ... PhysicalExam #clinical #video