8 results
COVID-19 Diagnostics In Context
Nucleic acid tests (NATs, for viral RNA)
1. Real time RT-PCR
2. Isothermal amplifcation
3. CRISPR
4.
Nucleic acid tests ... Real time RT-PCR ... generation sequencing (NGS ... diagnosis #testing #laboratory ... #tests #pcr
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
drugs that may cause ... false positive tests ... Phencyclidine (PCP ... DrugScreens #UDS #Laboratory
Cauda Equina Syndrome Overview

Cauda Equina Syndrome:
 • Prevalence: 1:33,000-100,000 ppl/yr
 • Incidence: 1.5-3.4 million ppl/yr
 •
lumbar spine • MCC ... - Emergency Causes ... • Provocative Tests ... absent anal wink test ... around the anus Laboratory
Chagas Disease - American Trypanosomiasis - Diagnosis and Management Summary
Chagas disease (American trypanosomiasis) is an infectious
infectious disease caused ... Laboratory accidents ... smear negative, PCR ... Confirmatory Tests ... and immunoblot (TESA
Causes of Lactate Elevation, Lactic Acidosis - Differential Diagnosis

The most common causes of hyperlactatemia are usually:
Causes of Lactate ... The most common causes ... www.ncbi.nlm.nih.gov/pmc ... - assess other laboratory ... or diagnostic tests
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Other +s: PCP, Histo ... Mucormycosis • Neg ... the use of this test ... FalsePositives #Laboratory
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
Weakness, cramping, nausea ... Antibiotics (Bactrim, PCN ... Cortisol+ACTH stim test ... only if no clear cause ... Bicarb<22) - avoid NS
Langerhans Cell Histiocytosis (LCH)

Granulomatous Lesions comprising langerin-positive histiocytes and an inflammatory infiltrate can arise in virtually
Incidence: 4–5 cases ... Birbeck granules (EM ... • Laboratory Tests ... : Blood tests to ... therapies for cases