Thoracic Fluid Content in Prediction of Failure of Weaning From Mechanical Ventilation

The Impact of Thoracic Fluid Content Measured by Cardiometry on Prediction of Failure of Weaning From Mechanical Ventilation

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT03094390

Enrollment

Registered

2017-03-29

Start date

2017-04-04

Completion date

2018-09-10

Last updated

2019-06-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mechanical Ventilation Complication

Brief summary

This study aims to test the accuracy of the total thoracic fluid content (TFC) measured by cardiometry can predict weaning failure. Area under receiver operating characteristic curve (AUROC) will be determined, sensitivity, specificity, and best cutoff value will be calculated for TFC in prediction of weaning failure.

Detailed description

Weaning from mechanical ventilation is a serious and challenging process in critical care practice. Weaning failure is associated with poor patient outcomes. Increased mortality in patients with failed weaning was due to development of complications related to re-intubation. Detection and correction of the cause of failed spontaneous breathing trial (SBT) helps the intensives to improve the outcome of the next trials. Fluid overload and positive cumulative fluid balance is a risk factor of weaning failure in both cardiac and non-cardiac patients. Many tools for prediction of lung congestion as a risk factor for weaning failure have been reported. The gold standard for detection of cardiac cause of weaning failure was pulmonary artery catheter. More simple tools had been investigated for detection of cardiac cause of weaning failure in patients with or without previous cardiac dysfunction such as extravascular lung water and B-natriuretic peptide (BNP) levels. Although measurement of extravascular lung water is a reliable tool for prediction of cardiac cause of weaning failure, it has the disadvantage of the need of advanced monitor with invasive arterial line. Bioreactance is a new technology used for measurement of cardiac output and total thoracic fluid content (TFC). More recently, electrical velocimetry is a newer technology with good performance in cardiac output monitoring. The use of electrical velocimetry in measurement of TFC has the advantage of being non-invasive with no need for advanced skills. The aim of this work is to validate the use of TFC (measured by electrical velocimetry) in prediction of weaning outcome.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* Patients aged 18 years or more scheduled for a spontaneous weaning trial (SBT) on pressure support ventilation.

Exclusion criteria

* Age \< 18 years old. * Pregnant patients. * Neuromuscular disease (stroke, myasthenia gravis and Guillain-Barrésyndrome). * Tracheostomy.

Design outcomes

Primary

Measure	Time frame	Description
Total thoracic fluid content (TFC)	5 minutes before spontaneous breathing trial	the value of TFC measured by cardiometry device (in liters)

Secondary

Measure	Time frame	Description
rapid shallow breathing index	5 minutes before spontaneous breathing trial.	the respiratory rate divided by the tidal volume (in liters)
P/F ratio	5 minutes before spontaneous breathing trial and 5 minutes before patient extubation	pressure of arterial oxygen (in mmHg) divided by fraction of inspired oxygen
fluid balance	during the last 24 hours before the weaning trial	the total fluid intake minus the fluid output (in liters)

Countries

Egypt

Outcome results