339 results
Agents Causing Potential False-Positive Results With Urine Drug Screening 

#Urine #DrugScreens #UDS #Laboratory #Toxicology #Diagnosis #FalsePositive
False-Positive Results With Urine ... Screening #Urine ... Toxicology #Diagnosis #FalsePositive
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
Urine Drug Screens ... Diphenhydramine #Urine ... Toxicology #Diagnosis #FalsePositive
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
False Positives on Urine ... #FalsePositives ... #Urine #DrugScreening
Causes Abnormal Urine Color - Differential Diagnosis
Turbid White Urine (Albinuria):
 • Chyluria, Filariasis, Schistosomiasis, Malignancy, Phosphaturia,
Causes Abnormal Urine ... Diagnosis Turbid White Urine ... listed under green urine ... * Green Urine: ... : • Purple Urine
Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
#Specificity #FalsePositive
Urine Microscopy Guide

#Diagnosis #Path #Nephrology #Urine #Microscopy #Chart #Guide #atlas
Urine Microscopy ... Path #Nephrology #Urine
Normal Anion-Gap Acidosis (NAGMA) - Differential Diagnosis Framework and Workup

NAGMA
- Chem, ABG or VBG
- Calculate Anion
Gap - UAG and Urine ... gap - UA with urine ... Gap - Estimate urine ... (+) NH4 in the urine ... - Renal • Urine
Urine Color - Differential Diagnosis
Red Urine:
 • Medical conditions: bleeding, porphyria, factitious disorder
 • Meds: rifampin,
Urine Color - Differential ... Diagnosis Red Urine ... spinach) Orange Urine ... red or orange urine ... ) Purple Urine:
Urine Microscopy Crystals
Uric Acid crystals:
 - Formation promoted by acidic urine
 - Seen in tumor lysis
Urine Microscopy ... promoted by acidic urine ... promoted by alkaline urine ... independent of urine ... independent of urine
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
examination, check urine ... uric acid: - Urine ... hyponatremia - Urine