- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04045262
Clinical Validation of Continuous and Non-invasive Monitoring of Effective Pulmonary Volume.
Clinical Validation of Continuous and Non-invasive Monitoring of Effective Pulmonary Volume Based on Exhaled CO2 Kinetics in Ventilated Patients.
Study Overview
Status
Conditions
Detailed Description
The capnodinamyc method is a new monitoring method that provides continuous (breath by breath) measurements of effective pulmonary blood flow (EPBF) and effective end-expiratory l lung volume (EELVCO2). The former refers to the non-shunted fraction of cardiac output and the latter to the functional end-expiratory lung volume (EELV) that contains CO2.
The capnodynamic method is based on the advanced analysis of CO2 kinetics and the law of Conservation of mass. It states that lungs have to eliminate a similar amounts of CO2 as produced by aerobic metabolism and reaches the lung via pulmonary perfusion. For its calculation, two different measurements are needed:
- Exhaled CO2 measured by infrared optic sensor technology placed in a mainstream configuration between the endotracheal tube and the "Y" piece of the ventilator respiratory circuit.
- Flow, airway pressure and ventilatory volumes measured by the mechanical ventilator spirometer.
The method requires the generation of cyclic small changes in the alveolar concentration of CO2 which is achieved by introducing a slightly modified breathing pattern. It consists of adding a short expiratory hold in each 3 out of 9 consecutive breaths and requires the patient to be in passive breathing conditions under mechanical ventilation.
EPBF and EELVCO2 have been validated in experimental conditions and the first validations in patients in the setting of general anesthesia are under way.
Methods:
This study on EELVCO2 in critically ill patients involves 2 types of evaluations:
The validation of absolute values of EELV by comparing it with CTsan. The trending ability of EELVCO2 in critically ill patients by comparing it with EIT.
A calculated sample size of 30 patients is required for each objective.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
-
Madrid, Spain, 28006
- Hospital Universitario de la Princesa
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- All patients on mechanical ventilation in passive breathing conditions in which a thoracic CTscan has been indicated for medical reasons and those with an EIT and a continuous cardiac monitoring
- Informed consent
Exclusion Criteria:
- Hemodynamic instability
- Presence of barotrauma/ pneumothorax
- Presence of bronchopleural fistulas
- Thorax alterations that preclude the positioning of the EIT electrode belt (usually at the IV intercostal space).
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Validation of the measurement of absolute values of effective lung volume
Time Frame: 1 day
|
To validate the measurement of absolute values of effective lung volume by the capnodynamic method previously described, as an estimate of end-expiratory lung volume.
For this purpose the capnodynamic method will be compared with gold standard reference method for measuring lung volumes, the computerized tomography scan (CTscan).
|
1 day
|
Analyze to which pulmonary compartments does effective lung volume most closely correlate
Time Frame: 1 day
|
Tomographic aeration level according to the density distribution analysis (non aerated, poorly aerated, normally and hyper aerated) does effective lung volume most closely correlate; taking into account that the CTscan measures an anatomic rather than a functional lung volume.
|
1 day
|
Improvement of capnodynamic ELV measurement
Time Frame: 1 day
|
To determine the effects of lung collapse on the accuracy and precision of the capnodynamic ELV measurement.
|
1 day
|
Trending ability of the capnodynamic end-expiratory lung volume method
Time Frame: 1 day
|
Breath by breath changes in EELVCO2 will be compared with breath by breath changes in lung aeration measured by electrical impedance tomography.
|
1 day
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Fernando Suarez Sipmann, MD PhD, Fundación de Investigación Biomédica - Hospital Universitario de La Princesa
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- EELVC02
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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.
Clinical Trials on Critical Illness
-
Duke UniversityNational Institute of Neurological Disorders and Stroke (NINDS); National Institutes...CompletedNeonatal Critical Illness | Pediatric Critical IllnessUnited States
-
Yale UniversityNational Institute on Aging (NIA)RecruitingCritical Illness | Illness, CriticalUnited States
-
McMaster UniversityLondon Health Sciences Centre; McMaster Children's Hospital; Canadian Critical...CompletedPediatric Critical IllnessCanada
-
Boston Children's HospitalCompleted
-
St Helens & Knowsley Teaching Hospitals NHS TrustManchester University NHS Foundation TrustCompleted
-
Sándor BeniczkyUniversity of Aarhus; Danish Council for Independent Research; Søster og Verner...CompletedCritical Illness Myopathy | Myopathy Critical IllnessDenmark
-
Hospital de Clinicas de Porto AlegreUnknownCritical Illness PolyneuropathiesBrazil
-
Peking Union Medical College HospitalBaxter Healthcare CorporationUnknownNutrition Therapy for Critical Illness
-
Assistance Publique - Hôpitaux de ParisRecruitingCritical Illness Related Corticosteroids InsufficiencyFrance
-
Yuzuncu Yıl UniversityKahramanmaras Sutcu Imam University; Izmir Ataturk Training and Research HospitalCompleted