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

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
Urine Drug Screens ... drugs that may cause ... false positive ... Diphenhydramine #Urine ... FalsePositive #Testing
Blood Product Transfusions One Pager Summary
Type and screen - determines blood type and detects in recipient
Crossmatch - involves testing ... flank pain, dark urine ... antigens (often false ... Causes purpura & ... negatives on testing
Blood Transfusion Reactions

Immune Mediated:
 • Febrile Non-Hemolytic Transfusion Reaction (FNHTR): Most common immune reaction to transfusion.
flank pain, dark urine ... antigens (often false ... Causes purpura & ... TRALI): Leading cause ... negatives on testing
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
Causes of Proteinuria ... present on repeat testing ... including overnight testing ... Proteinuria (Negative urine ... Diagnosis #Algorithm #Causes
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... Positives on Urine ... (High Rate of False ... FalsePositives #Urine ... DrugScreening #UDS #Testing
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
Medications that Can Cause ... False Positives ... Drug Tests Urine ... medications can cause ... Protonix), may cause
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 ... Haptoglobin Urine ... hemosiderin Urine ... Anemia #Laboratory #Testing
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 ... Glucan-containing gauzes ... other fungi • False ... Galactomannan #Pathogens #Testing
Hematuria Workup and Diagnosis Algorithm
 • Confirm hematuria → Urinalysis >3 RBCs/HPF, exclude mimics, repeat testing
mimics, repeat testing ... WBCs, or urine ... → Urine culture ... proteinuria, RBC casts ... Nephrology if cause
Algorithm for the diagnosis of chronic diarrhea.
It is usually impractical to test and treat the many
many possible causes ... In most cases, it ... diarrhea before testing ... reduce unnecessary testing ... Diarrhea #Algorithm #Testing