86 results
Misinterpretation of Urine Toxicology Screen - False Positives and Negatives

Dr. Y. Jay Lin @JayLin3455

#Urine #Toxicology #UTox
Misinterpretation ... Toxicology Screen - False ... Toxicology #UTox #False
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculosis Testing ... (TST) False-negative ... microscopy • Testing ... recommended because false-negative ... #Diagnosis #Workup
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 ... #OccultBlood #Testing
Laboratory Testing in Hemolytic Anemia

Intravascular vs Extravascular Hemolysis
Reticulocytes
Unconjugated bilirubin
LDH
Peripheral smear
Haptoglobin
Urine hemosiderin
Urine hemoglobin
Carboxyhemoglobin

#Hemolytic #Anemia #Laboratory #Testing #workup
Laboratory Testing ... Anemia #Laboratory #Testing ... #workup #diagnosis
Ancillary Studies in the Workup of Syncope

#Syncope #Ancillary #Workup #Testing #Diagnosis
Studies in the Workup ... Syncope #Ancillary #Workup ... #Testing #Diagnosis
1,3 Beta-D-Glucan and Galactomannan - Pathogens, and Testing Characteristics
1,3 ß-D-glucan:
 • Most fungi excluding mucor and
Pathogens, and Testing ... and pneumocystis False ... other fungi • False ... Galactomannan #Pathogens #Testing
Chronic Diarrhea - Workup
Osmotic:
 • Consider food diary and trial avoiding certain foods or meds, Consider
Chronic Diarrhea - Workup ... A/P, Consider testing ... celiac and/or testing ... TSH, Consider testing ... Chronic #Diarrhea #Workup
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... NSAlDs resulting in false-positive ... not result in false ... DrugScreening #UDS #Testing
Shotgun Laboratory Testing for Severe Acute Livery Injury

https://www.journalofhospitalmedicine.com/jhospmed/article/143598/hospital-medicine/ammonia-levels-and-hepatic-encephalopathy-patients-known

#TWDFNR #Testing #Laboratory #LiverInjury #Diagnosis #Workup #Hepatology #EBM #ChoosingWisely
Shotgun Laboratory Testing ... ammonia-levels-and-hepatic-encephalopathy-patients-known #TWDFNR #Testing ... LiverInjury #Diagnosis #Workup
COVID-19 Biomarkers 
 - Troponin
 - D-dimer
 - Lymphocyte Count
 - IL-6
 - LDH
 - Fibrinogen
Diagnosis #Laboratory #Testing ... #Workup