234 results
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Causes of Inaccurate ... #OccultBlood #Testing ... #Laboratory #FalsePositive ... #FalseNegative
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
Fecal Occult Blood Testing ... to unnecessary testing ... #OccultBlood #Testing ... #FOBT #Guaiac #FalsePositives ... #FalseNegatives
Causes of False-Positive and False-Negative IGRA and TST Results

#Diagnosis #TB #Tuberculosis #Tuberculin #SkinTest #TSTs #IGRA #FalseNegatives
Causes of False-Positive ... SkinTest #TSTs #IGRA #FalseNegatives ... #FalsePositives ... #Causes
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Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
#Specificity #FalsePositive ... #FalseNegative
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
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Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
drugs that may cause ... Toxicology #Diagnosis #FalsePositive ... #Testing
Reflex Testing - Causes of Hyporeflexia and Hyperreflexia
Focal Hyporeflexia: 
 • Radiculopathy, Mononeuropathy, Polyneuropathy, Acute stroke,
Reflex Testing - ... Causes of Hyporeflexia ... Deep coma (any cause ... Hyperreflexia #Testing ... #Causes #differential
Clinical Presentation and Diagnosis of Common Causes of Vaginitis

#Vaginitis #Differential #Diagnosis #Comparison #Table #Testing #Gynecology #OBGyn
Diagnosis of Common Causes ... Comparison #Table #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 ... sediment - WBC/RBC casts ... Diagnosis #Algorithm #Causes
Acute Kidney Injury - Differential Diagnosis Framework
PRERENAL:
 - Intrarenal vasoconstriction-hemodynamically mediated
 - Systemic vasodilation
 - Volume
white blood cell casts ... or pigmented casts ... nephrotoxic drugs, treating ... underlying cause ... percutaneous drainage, or stenting