- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01393431
Futility of Exhaled Breath Condensate pH Measurements in Ventilated Patients in Intensive Care Unit (ICU)
August 3, 2011 updated by: Universidad Nacional de Rosario
Exhaled Breath Condensate pH in Mechanically Ventilated Patients
Measurement of pH in Exhaled breath condensate has been mentioned as a robust variable from lung inflammation.
It is non-invasive and reproducible.
The investigators measured pH in the water condensed in the trap of expiratory arm of ventilator.In ICU the investigators measured pH in condensed water without interfering with patients treatment.
A group of critically ill patients mechanically ventilated due to non pulmonary cause were followed until successful weaning, death or pneumonia.
The investigators found that pH did not change along the study and it did not predict worsening condition.
Study Overview
Status
Terminated
Conditions
Detailed Description
Collection of exhaled breath condensate (EBC) became a promising method for obtaining samples from the lungs.
In this prospective clinical trial we aimed to answer if spontaneous EBC in the trap of the expiratory arm of the ventilator could replace EBC collected by coolant chamber with gas standardization with Argon as an inert gas.
Second, if EBC pH could predict ventilator associated pneumonia (VAP) and mortality.
We included a group of critically ill patients, that required mechanical ventilation due to non-pulmonary cause.
The patients were followed up until development of VAP, successful weaning or death.EBC pH spontaneously collected in the trap of expiratory arm of the ventilator.
We measured pH with a blood gas analyzer, named Radiometer ABL5 Copenhagen.
For the coolant chamber EBC pH measurement, the expiratory arm was passed through the chamber at -3ºC and in 10 min at least 2 ml was collected.
The rest of the EBC was collected in Ependorff tube and pH was measured after de-aeration of the condensate with argon (350 ml/min) for 10 min as a gas standardization procedure as previously described by Hunt and colleagues.
[Hunt JF, Fang K, Malik R, Snyder A, Malhotra N, Platts-Mills TAE, Gaston B. Endogenous airway acidification: implications for asthma pathophysiology.
Am J Resp Crit Care Med 2000; 161: 694-699.
]
Study Type
Observational
Enrollment (Actual)
34
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Santa Fe
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Granadero Baigorria, Santa Fe, Argentina, 2152
- Unidad de Terapia Intensiva. II Cátedra de Clínica Médica y Terapéutica. Universidad Nacional de Rosario. Hospital Escuela "Eva Perón". San Martín 1645.
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Adults (age >18) Acute critically ill patients that required endotracheal intubation and mechanical ventilation for at least 48 hours due to a non-pulmonary cause.
Description
Inclusion Criteria:
- Endotracheal intubation and mechanical ventilation for at least 48 hours due to non-pulmonary cause
- For whom their close acquaintances gave the informed consent
Exclusion Criteria:
- Pregnancy, denied surrogate decision-makers to give informed consent.
- Patients that required mechanical ventilation due to: pneumonia, severe respiratory infection, massive haemoptysis, acute severe asthma, bronchiectasis, COPD exacerbation, or acute lung injury. Finally, patients that expected to be ventilated less than 2 days.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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EBC pH
Observational study
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Exhaled Breath Condensate (EBC)pH of expiratory trap and Exhaled breath condensate pH obtained with coolant chamber and deaerated with Argon
Time Frame: follow up during mechanical ventilation, averaged less than 4 weeks
|
It was an observational study that showed no changes in EBC pH despite different patient´s outcome.
We, as investigators, did not make any intervention.
|
follow up during mechanical ventilation, averaged less than 4 weeks
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Exhaled breath condensate pH could predict ventilator associated pneumonia or death
Time Frame: Follow up during mechanical ventilation (averaged less than 4 weeks)
|
Follow up during mechanical ventilation (averaged less than 4 weeks)
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Luis J Nannini, MD, hospital E Perón. UNR. ARGENTINA
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
August 1, 2007
Primary Completion (Actual)
April 1, 2008
Study Completion (Actual)
April 1, 2008
Study Registration Dates
First Submitted
July 1, 2011
First Submitted That Met QC Criteria
July 11, 2011
First Posted (Estimate)
July 13, 2011
Study Record Updates
Last Update Posted (Estimate)
August 4, 2011
Last Update Submitted That Met QC Criteria
August 3, 2011
Last Verified
May 1, 2008
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- EBC pH in ICU
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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