Ventilator with dual gas supply

A - Human Necessities – 61 – M

Patent

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Details

A61M 16/00 (2006.01)

Patent

CA 2424358

A method of pressure regulation and a ventilator are provided. The ventilator (200) includes a positive relative pressure gas supply (204), a negative relative pressure gas supply (206), and a diverter valve (211). The diverter valve (211) includes a positive pressure port (303) connected to the positive relative pressure gas supply (204), a negative pressure port (305) connected to the negative relative pressure gas supply (206), and a gas supply port (309) communicating with a gas delivery device (220, 222). The ventilator (200) preferably further includes a feedback sensor (229) that detects a gas supply difference between a gas supply and a predetermined gas supply and generates a feedback signal that is substantially related to the gas supply difference. The ventilator (200) preferably further includes a diverter valve actuator (212) communicating with the diverter valve (211) and operating the diverter valve (211) to communicate the positive relative pressure gas supply (204) and the negative relative pressure gas (206) supply to the gas supply port (309) of the diverter valve (211) based upon the feedback signal.

L'invention concerne une régulation de pression et un respirateur. Le respirateur comprend une alimentation en gaz à pression relative positive, une alimentation en gaz à pression relative négative, et une vanne de dérivation. La vanne de dérivation comprend un orifice de pression positive relié à l'alimentation en gaz à pression positive, une orifice de pression négative relié à l'alimentation en gaz à pression relative négative, et un orifice d'alimentation en gaz communiquant avec un dispositif de distribution de gaz. Le ventilateur comprend aussi, de préférence, un capteur de rétroaction qui détecte une différence d'alimentation entre une alimentation en gaz et une alimentation en gaz prédéterminée et génère un signal de rétroaction qui se rapporte sensiblement à la différence d'alimentation en gaz. Le respirateur comprend aussi, de préférence, un actionneur de vanne de dérivation communiquant avec la vanne de dérivation et faisant fonctionner la vanne de dérivation afin de faire entrer en communication, suivant le signal de rétroaction, l'alimentation en gaz à pression relative positive et l'alimentation en gaz à pression relative négative avec l'orifice d'alimentation en gaz .

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