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

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
that may cause false ... Toxicology #Diagnosis #FalsePositive ... #Testing
Agents Causing Potential False-Positive Results With Urine Drug Screening 

#Urine #DrugScreens #UDS #Laboratory #Toxicology #Diagnosis #FalsePositive
Causing Potential False-Positive ... Toxicology #Diagnosis #FalsePositive ... #Testing
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... not result in false ... #FalsePositives ... DrugScreening #UDS #Testing
PFO with shunting on Contrast Echocardiogram (a4c) 
74 yo presents with CVA. RoPE score of 4.
Echocardiogram (a4c ... MD, FACP, FACC, FASE ... Echocardiogram #a4c ... clinical #cardiology #pocus
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
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 ... BAL samples • False ... Galactomannan #Fungal #Testing ... #FalsePositives
LV Pseudoaneurysm

• False “pseudo” aneurysm: rupture w/ blood contained *outside* wall layers. (case below)

• True aneurysm:
Pseudoaneurysm • False ... Ventricular #Clinical #POCUS ... CardiacMRI #PSAX #A4C
Constrictive Pericarditis on Echocardiogram
A 55-year-old female marathon runner presents to clinic w/ 6-months of worsening breathlessness
expiration not meeting ... Echocardiogram #a4c ... #pocus #clinical
Blood Product Transfusions One Pager Summary
Type and screen - determines blood type and detects in recipient
Crossmatch - involves testing ... antigens (often false ... negatives on testing ... RBCs (stored at 4C ... country) - False