Respiratory assistance device, nasal apparatus and respiratory assistance mask

A respiratory assistance device for a patient, the device comprising:

• a tubular element forming a main channel configured to be connected by a distal end thereof to an airway of the patient, said main channel configured to connect the respiratory system of said patient to the atmosphere by a proximal end thereof;
• at least one first auxiliary channel configured to allow injection through at least one distal outlet orifice of the at least one first auxiliary channel of at least one jet of breathable gas configured for ventilation of said patient, said at least one distal outlet orifice emerging into said main channel in a vicinity of the distal end of the main channel;
• a deflection system configured to allow deflection of the at least one jet of breathable gas towards an inside of said main channel and towards the distal end according to a determined inclination;
• at least one coaxial inner tube centered in the main channel, said at least one inner tube having a determined length having a distal end turned towards the distal end of the tubular element and a proximal end turned towards the proximal end of the tubular element, said determined length being such that said at least one inner tube is extended at a maximum between distal and proximal ends of said respiratory assistance device, said at least one inner tube crossing a respective axis of the at least one deflected jet in order to form a jet breaker towards a center of the main channel in a zone of meeting of said respective deflected jet axis of the at least one deflected jet and of said at least one inner tube, the at least one inner tube being hollow and open at the two ends thereof in the main channel in order to form a by-pass between the distal end and the proximal end of the main channel for the gases circulating in said main channel and for gases breathed out by the patient.