GetTheDiagnosis.org

Welcome, guest.
Login or Sign up to edit.

Add an entry

Search:
 

Tools

Add a finding for this diagnosis

Add prevalence for this diagnosis

Switch to calculator mode to see positive predictive value

Switch to sensitivity and specificity

Sort findings by Tag

Sort findings by Differential Diagnosis

Jump To

Good Positive and Negative Likelihood Ratios

Good Negative Likelihood Ratio

Good Positive Likelihood Ratio

Poorly Diagnostic Findings

Ventilator-Associated Pneumonia: Likelihood Ratios

Introduction: This reflects the clinical entity of a pneumonia developing while a patient is on a ventilator (not a Community-Acquired Pneumonia). Thus, this will occur after the patient has been on the ventilator for days, not as the initial presenting disease.

[Edit Diagnosis] [Merge dx] [Add prevalence]

Tags: Infection Pulmonary Tag this Diagnosis.

The likelihood ratios of findings for Ventilator-Associated Pneumonia are listed below. See the left navigation bar to change the display.

Good Positive and Negative Likelihood Ratios

Finding +LR-LR Comments, Study
Air Bronchogram
Duplicate Edit
20.3

single or multiple air bronchograms

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Fever, Leukocytosis, and Purulent Sputum Edit 2.80.4

at least 2 of fever, leukocytosis, and purulent sputum

from one study

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Bronchial Aspirate Culture Edit 9.60.4

blind bronchial aspirate culture >10^5 CFU/ml

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Good Negative Likelihood Ratio

Finding +LR-LR Comments, Study
Chest X-Ray Edit 1.70.4

new infiltrate on CXR

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Good Positive Likelihood Ratio

Finding +LR-LR Comments, Study
Air Bronchogram
Duplicate Edit
3.80.9

'single air bronchogram' on CXR

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Poorly Diagnostic Findings

Finding +LR-LR Comments, Study
Atelectasis Edit 0.81.1

on CXR

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

BAL Culture Edit 1.40.8

>10^4 CFU/ml

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

hearing loss Edit 1.20.9

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Leukocytosis Edit 1.30.7

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Hypoxemia Edit 1.10.9

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Intracellular Bacteria in BAL Edit 11

presence of intracellular bacteria in neutrophils in BAL

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Purulent Sputum Edit 1.30.6

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278

Neutrophilic BAL Edit Sensitivity = 95%

>50% neutrophils in BAL fluid

specificity varied from 38% to 94% in two studies.

Study: JAMA. 2007 Apr 11;297(14):1583-93. PMID: 17426278