Systematic Calculation of HyperOxygenation Transit Time

Study Overview
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Brief Summary
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Cardiac output (CO) is an essential physiological parameter of healthy person or illness. In clinical practices, all methods of measuring the CO(Fick method, thoracic impedance, esophageal echodoppler etc) contain limit. Each method are dangerous or hard to implement. CO is probably determining element of blood transit time and thus the availability of oxygen between the central organs (heart, lung) and the peripheral organs (leg, arms). Our hypothesis is transcutaneous oxymetry mesurement with oxygen inhalation, to cause a transient hyperoxia, can be used to determinate blood transit time between central organs and peripheral organs. This simple method will be non invasive technique.

Detailed Description
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At admission eligible patients are proposed to participate. Written consent is signed after complete oral and written explanation of the protocol is signed. The time of onset hyperoxia will be compare to usual CO method by cross correlation. The duration of participation for subject is equal to 1 hour.

Official Title
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Systematic Calculation of HyperOxygenation Transit Time Mesure transcutanée de l'oxygène au Cours de l'Hyperoxie Transitoire

Conditions
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Cardiac Output

Intervention / Treatment
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* Diagnostic Test: Transcutaneous oxymetry measurement


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults over 18 Cardiac output measurement considered at least 2 hours prior to the study Affiliation to a French National healthcare system Written informed consent must be obtained prior to protocol-specific Exclusion Criteria: Acute or decompensated cardiac or respiratory failure Allergy to medical adhesives Patients under reinforced protection, pregnancy, deprived of liberty by judicial or administrative decision, hospitalized without consent or admitted to a health or social establishment for purposes other than research Inability to understand the instructions or objectives of the study

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cardiac Output Measurement<br>Subject will have a usual cardiac output | Diagnostic Test: Transcutaneous oxymetry measurement<br>* Transcutaneous oxymetry measurement with transient hyperoxia period (2 periods of 30seconds at 60% of oxygen)<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Estimation of transcutaneous oxymetry with transient hyperoxia | Transition time calcutation from oxygen to peripheral organs by transcutaneous oxymetry method. | 24 months | 
| Average of CO measured | Average of CO by usual method (catheterisation or transoesophageal echocardiography) reported in medical record of patients | 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cardiac Output, vascular medicine, Transcutaneous Oxymetry