In this trial the investigators will evaluate blood flow in common carotid artery of healthy subjects treated with Continuous Positive Airway Pressure (CPAP) Ventilation, comparing two different devices: oronasal mask versus Helmet. The hypothesis is that Helmet CPAP reduces carotid flow compared to oronasal mask.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
19
Partecipants will be started on Continuous Positive Airway Pressure at 10 cmH2O on inspired fraction of oxygen (FiO2)= 21% with the Helmet interface for a duration of 5 minutes while laying down on a stretcher with head elevated at 60°
Partecipants will be started on Continuous Positive Airway Pressure at 10 cmH2O on Inspired fraction of oxygen (FiO2)= 21% with the oronasal mask interface for a duration of 5 minutes while laying down on a stretcher with head elevated at 60°
Ospedale Papa Giovanni XXIII
Bergamo, Italy
Common carotid artery flow
Left common carotid artery flow, expressed as ml/min measured with pulsed wave doppler with ultrasound
Time frame: 4 consecutive heart beats at the end of the intervention
Mean arterial blood pressure
Non invasive mean arterial blood pressure on left arm
Time frame: single measure, at the end of the intervention
Peripheral vascular resistance
Peripheral vascular resistance measured in left common carotid artery, measured with pulsed wave doppler with ultrasound
Time frame: 4 consecutive heart beats at the end of the intervention
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