Non-Invasive Positive-Pressure Ventilation
Conditions
Brief summary
Non invasive ventilation has been proposed to reduce the incidence of ventilatory dysfunction following abdominal aortic surgery. However, the nasogastric tube reduces the airtightness of the facial mask used to perform non invasive ventilation and induces air leaks. The use of a helmet reduces air leaks, thus seems adequate to ensure patient-ventilator interface. However, the high dead space related to helmet volume is responsible for asynchrony between patient demand and ventilatory support delivery. The investigators hypothesized driving the ventilator based on a neural signal (diaphragm electrical activity) would reduce patient-ventilator asynchronies.
Interventions
DEVICENeurally Adjusted Ventilatory Assistance
In ICU following abdominal aortic surgery, in extubated patient, non-invasive ventilation was performed as follows: * facial mask with non-invasive pressure support ventilation mode to define settings for helmet ventilation * helmet use with non-invasive pressure support ventilation mode to define adequate settings * helmet use with neurally adjusted ventilatory assist mode, based on previous settings
Sponsors
Pierre and Marie Curie University
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients with increased risk of postoperative ventilatory dysfunction following abdominal aortic surgery
Exclusion criteria
* Contra-indication to non-invasive ventilation pregnancy.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Triggering delay | Every inspiration, for 10 minutes | Duration between the onset of neural inspiration and the onset of insufflation |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Cycling off delay | Every inspiration, for 10 minutes | Delay between the end of neural inspiration and the end of insufflation |
Countries
France
Outcome results
None listed