Ventilator

1 . A ventilator for mechanical ventilation during a breathing cycle including an inhalation cycle and an exhalation cycle, the ventilator configurable to be in fluid communication with a supply of a first fluid and including an inhalation pathway and an exhalation pathway, the ventilator comprising:

a first fluid injector in fluid communication with the supply of the first fluid for injecting the first fluid, wherein the inhalation pathway receives the first fluid injected by the first fluid injector; and

a controller operatively connected with the first fluid injector and programmed to:

selectively actuate the first fluid injector to inject the first fluid wherein the first fluid is received in the inhalation pathway such that an inhalation pressure in the inhalation pathway is within a predetermined range during the inhalation cycle; and

wherein the first fluid is air.

2 . A ventilator for mechanical ventilation during a breathing cycle including an inhalation cycle and an exhalation cycle, the ventilator configurable to be in fluid communication with a supply of a first fluid and including an inhalation pathway and an exhalation pathway, the ventilator comprising:

a first fluid injector in fluid communication with the supply of the first fluid for injecting the first fluid, wherein the inhalation pathway receives the first fluid injected by the first fluid injector; and

a controller operatively connected with the first fluid injector and programmed to:

selectively actuate the first fluid injector to inject the first fluid wherein the first fluid is received in the inhalation pathway such that an inhalation pressure in the inhalation pathway is within a predetermined range during the inhalation cycle,

wherein the ventilator is configurable to be in fluid communication with a supply of a second fluid, the ventilator further comprising:

a mixing chamber in fluid communication with the first fluid injector and with the inhalation pathway, wherein the first fluid injected by the first fluid injector is communicated to the inhalation pathway through the mixing chamber; and

a second fluid injector in fluid communication with the supply of the second fluid for injecting the second fluid, wherein the second fluid injected by the second fluid injector is communicated to the inhalation pathway through the mixing chamber;

wherein the controller is further programmed to:

selectively actuate the first fluid injector and the second fluid injector to inject the first fluid and the second fluid respectively to form a mixture of the first fluid and the second fluid in the mixing chamber for inhalation by a patient during the inhalation cycle,

wherein a mixture ratio between the first fluid to the second fluid can vary between 0:100 and 100:0;

wherein a mixture pressure of the mixture of the first fluid and the second fluid is within the predetermined range during the inhalation cycle.

3 . The ventilator of claim 2 , wherein the second fluid is oxygen.

4 . The ventilator of claim 2 , further comprising:

a third fluid injector in fluid communication with the supply of the first fluid for injecting the first fluid, wherein the exhalation pathway receives the first fluid injected by the third fluid injector; and

a restriction orifice in the exhalation pathway;

wherein the controller is further programmed to:

selectively actuate the third fluid injector to inject the first fluid wherein the first fluid is received in the exhalation pathway such that an exhalation pressure in the exhalation pathway is within a predetermined range during at least a portion of the exhalation cycle.

5 . The ventilator of claim 4 , wherein the first fluid is air and the second fluid is oxygen.

6 . The ventilator of claim 4 , further comprising a dosing injector fluidly connected to the mixing chamber.

7 . The ventilator of claim 6 , further comprising a third fluid rail for storage of a predetermined volume of a third fluid; the third fluid rail being fluidly connected to a fourth fluid injector for introducing the third fluid into the mixing chamber.

8 . The ventilator of claim 7 , wherein the controller is further programmed to:

selectively actuate anyone one or more of the first fluid injector, the second fluid injector, and the fourth fluid injector to form a mixture of fluids injected respectively therefrom in the mixing chamber for inhalation by a patient during the inhalation cycle,

wherein the mixture comprises any combination from 0 to 100 percent of each of said fluids injected respectively therefrom;

wherein a mixture pressure of the mixture of the first fluid, the second fluid and the third fluid is within the predetermined range during the inhalation cycle.

9 . The ventilator of claim 8 , wherein the first fluid is air and the second fluid is oxygen.

10 . A ventilator comprising:

a first fluid rail for storage of a predetermined volume of a first fluid;

a first fluid injector fluidly connected with the first fluid rail;

a second fluid rail for storage of a predetermined volume of a second fluid;

a second fluid injector fluidly connected with the second fluid rail;

a mixing chamber fluidly connected with the first fluid injector and the second fluid injector and with an inhalation pathway;

a third fluid injector fluidly connected with the first fluid rail and with an exhalation pathway;

a mouthpiece for a patient fluidly connected to the exhalation pathway;

an APL valve fluidly connected to the inhalation pathway and the mouthpiece;

a breathing-rate-control valve fluidly connected to the exhalation pathway and a drain conduit;

a controller operatively connected to the first fluid injector; the second fluid injector, the third fluid injector and the breathing-rate-control valve and programmed to:

actuate the breathing-rate-control valve to generate a breathing cycle including an inhalation cycle and an exhalation cycle;

selectively actuate the first fluid injector and the second fluid injector to inject the first fluid and the second fluid respectively to form a mixture of the first fluid and the second fluid in the mixing chamber for inhalation by a patient during the inhalation cycle, wherein a mixture ratio between the first fluid to the second fluid can vary between 0:100 and 100:0; and

actuate the third fluid injector to generate back pressure in the exhalation pathway during an exhalation cycle.

11 . The ventilator as claimed in claim 10 , wherein the first fluid is air and the second fluid is oxygen.