25 results
Tuberculous Pleural Effusions - Diagnostic Testing
Pleural fluid culture - Up to 40% sensitivity
Pleural biopsy culture and
Effusions - Diagnostic Testing ... Pleural fluid PCR ... Pleural biopsy PCR ... Tuberculous #Diagnosis #Laboratory ... #Testing #Sensitivity
Hypophosphatemia Diagnostic Algorithm
- GI Losses
- Redistribution
- 1° HPT
- 1° Renal PO4 wasting: Hereditary, TIO, Fanconi Syndrome,
Hypophosphatemia Diagnostic Algorithm ... - 1° Renal PO4 wasting ... Hypophosphatemia #phosphorus #low ... #diagnosis #Algorithm ... #differential #nephrology
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Differential Diagnosis Algorithm ... Uric Acid - Low ... Acid → renal salt wasting ... #nephrology #sodium ... #low #uricacid
COVID19 Testing - PCR vs CT - Sensitivity and Specificity

Original Data via https://pubs.rsna.org/doi/full/10.1148/radiol.2020200642

Admission laboratory patterns in
COVID19 Testing ... - PCR vs CT - Sensitivity ... .2020200642 Admission laboratory ... iBookCC #COVID19 #Testing ... Sensitivity #Specificity
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
test - High sensitivity ... negative if on low-gluten ... Widely variable sensitivity ... Celiac #Disease #Testing ... #Laboratory #Tests
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia Algorithm ... Cerebral salt wasting ... Primary polydipsia, Low ... #Hyponatremia #Algorithm ... diagnosis #sodium #nephrology
Helicobacter Pylori Testing  Methods - Sensitivity and Specificity

Serology - 85% - 79% - Does not
Helicobacter Pylori Testing ... Methods - Sensitivity ... other means of testing ... if prevalence low ... #Laboratory #Diagnosis
Diagnosis Adrenal Insufficiency - Algorithm

Step 1) Screening Test: 6-8AM Cortisol Level
 - Early morning cortisol levels
Insufficiency - Algorithm ... specificity for AI (but low ... sensitivity) ... require Cosyntropin testing ... - Low ACTH is
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Galactomannan Testing ... Other +s: PCP, Histo ... clinical situations, low ... Galactomannan #Fungal #Testing ... FalsePositives #Laboratory
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Cerebral salt wasting ... Hypothyroidism, Low ... #Hyponatremia #algorithm ... diagnosis #sodium #low ... #nephrology