Apparatus for respiratory assistance and non-invasive detection of alveolar re-recruitment for patients suffering from respiratory failure

摘要

Apparatus (1) for respiratory assistance and non-invasive detection of alveolar de-recruitment for patients (2) suffering from respiratory insufficiency, said apparatus (1) comprising: first means (3) that allow respiratory functions to be carried out and which include ducts (5, 6, 7, 20, 21) for the passage of air from and to the airways of a patient (2), in which said first means (3) that allow carrying out the respiratory functions comprise a mechanical ventilator (3) which allows imposing a respiratory component (presp), and providing an adjustable final expiratory pressure (PEEP) adjustable; second means (15) being provided which allow to impose an additional pressure component (Pstim) with at least one harmonic of frequency and an harmonic of amplitude suitable to allow obtaining said inspiratory reactance (Xrs); said apparatus (1) provides a respiratory pressure to said patient (2) due to said respiratory component (presp), said final positive expiratory pressure (PEEP) and said additional pressure component (Pstim); pressure transducers (9, 10) in electrical signals, flow transducers (8) in electrical signals of said respiratory pressure and calculation means (12, 412) that allow said electrical signals to be processed so as to obtain a value of the inspiratory reactance (Xrs) indicative of the state of pulmonary re-recruitment, characterized in that said calculation means (12, 412) calculate said inspiratory reactance (Xrs) for increasing positive final expiratory pressure (PEEP) values and for an expiratory pressure positive end (PEEP) decreasing; said calculation means (12, 412) calculate the positive final expiratory pressure pressure (PEEP) value corresponding to a maximum breathing reactance point (Xrs).