11 results
Dix-Hallpike Maneuver for BPPV

Procedure:
1. Make the patient sit on examination table, such that the shoulders would
for BPPV Procedure ... 45° towards the test ... throughout the test ... Supports the patient ... affected ear #Dix
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... • mouthwash, short-chain ... naproxen and modern tests ... #UDS #Testing #Laboratory
RPR - False Positives
Causes of a false positive RPR that are not syphilis. (False-negative treponemal tests
RPR - False Positives ... treponemal tests ... are rare; case reports ... #Positives #differential ... diagnosis #syphilis #laboratory
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
auditory findings BPPV ... • Short-lived ... Positive Hallpike test ... or supine roll test ... Vertigo #Algorithm #differential
Hemolysis - Differential Diagnosis Framework

1) Environment
  - Fragmentation
  - MAHA: TTP, HUS, DIC, HELLP
Hemolysis - Differential ... MAHA: TTP, HUS, DIC ... Hypophostphatemia Laboratory ... Tests: - Haptoglobin ... #Hemolysis #Differential
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Spec 81% for dx ... of IA PPV ... the use of this test ... in BAL does not differentiate ... FalsePositives #Laboratory
Dix-Hallpike Maneuver for the Diagnosis of BPPV
The Dix–Hallpike test (Nylen Barany test) is a diagnostic maneuver
Dix-Hallpike Maneuver ... the Diagnosis of BPPV ... The Dix–Hallpike ... test (Nylen Barany ... test) is a diagnostic
Dix-Hallpike Maneuver for the Diagnosis of BPPV (Animated)

The Dix–Hallpike test (Nylen Barany test) is a diagnostic
Dix-Hallpike Maneuver ... the Diagnosis of BPPV ... test (Nylen Barany ... test) is a diagnostic ... identify posterior BPPV
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Fecal Occult Blood Test ... Results False ... anticoagulant medication False ... OccultBlood #Testing #Laboratory ... FalseNegative #Diagnosis #Differential
Allopecia - Differential Diagnosis Framework for Hair Loss

Localized / Focal Hair Loss Pattern:
 • Scarring Alopecia:
Allopecia - Differential ... disease • Pull test ... texture at bald spots ... fungi Initial Laboratory ... Tests: • TSH