Portable, nitric oxide generator

• US 9,138,707 B2
• Filed: 04/06/2009
• Issued: 09/22/2015
• Est. Priority Date: 12/10/2002
• Status: Active Grant

• Current Assignee: SYK Technologies, LLC
• Original Assignee: Sy Kimball
• Inventors: Miller, J. W. Randolph, Moon, William, Merrell, Keith L.
• Primary Examiner(s): Mayes, Melvin C
• Assistant Examiner(s): COHEN, STEFANIE J
• Application Number:
  US12/419,123
• Publication Number:
  US 20100003349A1
• Time in Patent Office: 2,360 Days
• Field of Search: 423/305, 424/718, 128/200.24, 128/203.12, 128/203.14, 128/203.15, 128/203.17, 128/203.26, 604/23, 514/826, 442/51, 442/52, 252/71, 252/183.11
• US Class Current: 1/1
• CPC Class Codes: A61K 33/00 Medicinal preparations containing inorganic active ingredients
• CPC Class Codes: A61P 11/00 Drugs for disorders of the respiratory system
• CPC Class Codes: B01J 2219/00135 Electric resistance heaters
• CPC Class Codes: B01J 7/00 Apparatus for generating gases production of inert gas mixtures B01J19/14; for generating specific gases, see the relevant subclasses, e.g. C01B, C10J ; in "air bags" on vehicles B60R21/26; for starter gas F02C7/26; blasting cartridges for producing gas under pressure F42B3/04
• CPC Class Codes: C01B 21/24 Nitric oxide (NO) C01B21/203 takes precedence

Abstract

An apparatus for portable delivery of nitric oxide without the need for pressurized tanks, power supplies, or other devices provides a single therapy session by triggering a heater to heat a reaction chamber. A piercing assembly may trigger to open sealed containers, such as bags, of liquid water or salt water in order to activate the heaters. Upon addition of liquid such as water or salt water to a chemically reactive heating element, heat is generated to activate the chemicals generating nitric oxide within a sealed reactor. Upon triggering, liquid containers are unsealed, the liquid drains down to initiate reaction of the heating chemicals, and the heat begins to penetrate the reactor. The reactor, in turn, heats its contents, which react to form nitric oxide expelled by the reactor to a line feeding a cannula for therapy.

Claims

1. A method of generating nitric oxide, the method comprising:

providing a mixture of reactants comprising a nitrate compound and a nitrite compound in a reactor;

providing a heating system comprising water in a sealed, rupturable container and water-activated chemicals positioned below the mixture of reactants to heat the mixture of reactants;

rupturing the container in a manner that activates the water-activated chemicals and produces heat;

heating the mixture of reactants to initiate a reaction within the mixture of reactants, thereby generating nitric oxide gas;

evacuating the nitric oxide gas away from the reactor in a closed conduit

cooling the nitric oxide gas; and

delivering the nitric oxide gas at substantially ambient conditions to a user to provide a therapeutically safe concentration of the nitric oxide gas.

2. The method of claim 1, wherein the mixture of reactants is configured as granules.

3. The method of claim 2, further comprising sizing the granules to melt and react without vaporizing at least one of the reactants in the mixture.

4. The method of claim 1, further comprising controlling the heating system to control a rate of generation of the nitric oxide gas.

5. The method of claim 1, wherein the reactants consist essentially of:

a non-deliquescent nitrite compound;

a nitrate compound; and

a metal oxide.

6. The method of claim 5, wherein the non-deliquescent nitrite compound is sodium nitrite, the nitrate compound is potassium nitrate, and the metal oxide is chromic oxide.

7. The method of claim 1, wherein the water in the heating system is salt water.

8. A method of providing nitric oxide comprising:

selecting a generator comprising a reactor system, self-contained and containing first reactants and second reactants;

generating heat by activating the second reactants;

generating nitric oxide by activating the first reactants in response to the generating heat;

cooling the nitric oxide;

introducing the nitric oxide into a breathing air of a subject; and

delivering a therapeutically effective amount of the nitric oxide to the subject.

9. The method of claim 8, wherein the nitric oxide is at a concentration of from about a hundred parts per million to about five thousand parts per million in the breathing air.

10. The method of claim 8, wherein the breathing air is delivered to the subject through nasal inhalation to provide approximately five thousand parts per million of nitric oxide to the subject.

11. The method of claim 8, further comprising combining a constituent of the first reactants in a dry granular state with the other first reactants before activating the first reactants.

12. The method of claim 11, wherein the constituent includes at least one selected from the group consisting of potassium nitrite and sodium nitrite.

13. The method of claim 8, wherein selecting the generator further comprises:

providing a first container to contain a liquid and insulate space interior to the first container;

positioning a first chemical reactor in the first container to contain a first reaction; and

positioning a second chemical reactor in the first container and below the first reactor to contain a second reaction heating the first reactor.

14. A method of providing nitric oxide, the method comprising:

providing first reactants in a dry mixture, wherein the first reactants are selected to react in response to heating thereof and to generate nitric oxide gas upon heating;

providing a first container containing the first reactants, wherein the first container further comprises providing a conduit extending from the first container to conduct the nitric oxide gas from the first container;

providing a second container thermally insulated and substantially surrounding the first container and allowing the conduit to pass outside the second container;

providing a third container, sealed and containing salt water, the third container being located outside the first container and inside the second container;

providing second reactants, dry and located inside the second container, the second reactants being selected to react in the presence of water and be exothermic upon reaction in the presence of water, thereby generating energy and heat to initiate reaction of the first reactants in the first container;

providing an opener positioned to unseal the third container upon actuation of the opener and allow the salt water to pour onto the second reactants, initiating mutual reaction of the second reactants; and

producing nitric oxide gas.

15. The method of claim 14, further comprising:

mixing the nitric oxide with a diluent gas to form a mixture breathable by a subject; and

delivering, by the conduit, the breathable mixture, regulated to substantially ambient temperature and pressure to provide a therapeutically safe and effective concentration of the nitric oxide to the subject.

16. The method of claim 15, wherein the first reactants consist essentially of potassium nitrate, sodium nitrite, and a metal oxide.

17. The method of claim 16, wherein the metal oxide is chromic oxide, calcined to remove substantially all water bonded thereto.