14 results
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Hyponatremia Differential ... Diagnosis Algorithm ... Uric Acid - Low ... Acid → renal salt wasting ... #Algorithm #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia ... Cerebral salt wasting ... Primary polydipsia, Low ... #Algorithm #diagnosis ... #sodium #nephrology
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Based Approach to Hyponatremia ... Cerebral salt wasting ... Hypothyroidism, Low ... #algorithm #diagnosis ... #sodium #low #nephrology
Helicobacter Pylori Testing  Methods - Sensitivity and Specificity

Serology - 85% - 79% - Does not
Helicobacter Pylori Testing ... if prevalence low ... Urea breath test ... first line test ... #Laboratory #Diagnosis
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
can be high or low ... Cerebral Salt Wasting ... Primary polydipsia), Low ... #differential #diagnosis ... table #sodium #nephrology
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
more time for the laboratory ... chest wall, and low ... (to support a diagnosis ... Rheumatoid #Arthritis #laboratory ... #workup #diagnosis
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
• mouthwash, short-chain ... naproxen and modern tests ... hemp products are low ... DrugScreening #UDS #Testing ... #Laboratory #diagnosis
Recommended initial testing for patients being evaluated for glomerular disease 

24-hour urine collection - Quantify proteinuria.
Spot PC (protein ... in monitoring low-level ... C3, C4 - Test for ... #workup #diagnosis ... nephrotic #nephritic #nephrology
Summary of Available Tests for Clostridium difficile Infection, in Decreasing Order of Sensitivity
 • Toxigenic culture
Summary of Available Tests ... vegetative cells or spores ... amplification tests ... difficile #CDiff #laboratory ... #diagnosis #testing
Cauda Equina Syndrome Overview

Cauda Equina Syndrome:
 • Prevalence: 1:33,000-100,000 ppl/yr
 • Incidence: 1.5-3.4 million ppl/yr
 •
symptoms: • Severe low ... • Provocative Tests ... absent anal wink test ... around the anus Laboratory ... #causes #neurology