5866 results
What's in a Blood Gas? VBG vs ABG

BOTTOM LINE: VBG is less painful, more easily obtained
sensitivity & 100% NPV ... #EBM #Diagnosis
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
#calculations #diagnosis ... #specificity #PPV ... #NPV
Fungal Biomarkers: Comparing Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 •
Spec -80% for IA, PPV ... < 50%, NPV > 90% ... Galactomannan #diagnosis
Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
NegativePredictiveValue #NPV ... #calculations #diagnosis
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
will correctly diagnose ... Calculation #Table #PPV ... #NPV #Formulas
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
: Differential diagnosis ... in aVR > 0.7: ppv ... NPV = 95% 4. ... electrocardiogram #diagnosis
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
PPV: proportion ... NPV: proportion ... specificity -> higher PPV ... sensitivity -> higher NPV ... #calculations #diagnosis
Summary for providing acute non-invasive ventilation (NIV)

- Indications for NIV
- Contraindications for NIV
- NIV Setup
- NIV
non-invasive ventilation (NIV ... Indications for NIV ... Contraindications for NIV ... - NIV Setup - ... NIV Monitoring
Pap Smear Algorithm 
#Diagnosis #Pap #Smear #Test #Cervical #HPV #Screening #PrimaryCare #Management #Vaccination #Gynecology
Smear Algorithm #Diagnosis ... Test #Cervical #HPV
Acute Coronary Syndrome - Diagnostic Likelihood Ratios for Symptoms and Physical Examination. 

Source:  Does This
Coronary Syndrome - Diagnostic ... JAMA. 2015 Nov 10 ... #EBM #Diagnosis