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Good Positive Likelihood Ratio

Post-Extubation Stridor: Likelihood Ratios

Introduction: Laryngeal edema around the ET tube that causes upper airway obstruction when the tube is removed during extubation, thus requiring re-intubation.

Generally it is felt that one should test for an air leak around the ET tube (after deflating the cuff) to indicate that the larynx has not swelled. One can test either by listening with a stethoscope or by looking at the vent monitors.

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Tags: Pulmonary Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Intubated patients 4.6% Respir Care. 2005 Dec;50(12):1632-8. PMID 16318644
Intubated patients 1.6% severe enough to require reintubation

Respir Care. 2005 Dec;50(12):1632-8. PMID 16318644

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The likelihood ratios of findings for Post-Extubation Stridor are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Good Positive Likelihood Ratio
FindingResult +LR-LR
[ + ] Cuff Leak Test + 0 - 3.10.6