Transpulmonary systemic cooling using liquid mists

• US 20050154430A1
• Filed: 03/02/2004
• Published: 07/14/2005
• Est. Priority Date: 01/09/2004
• Status: Abandoned Application

• Current Assignee: Benechill, Inc. (Braincool Ab)
• Original Assignee: Benecool Incorporated
• Inventors: Faithfull, N. Simon, Barbut, Denise R., Riess, Jean G.
• Application Number:
  US10/792,365
• Publication Number:
  US 20050154430A1
• Time in Patent Office: Days
• US Class Current: 607/96
• CPC Class Codes: A61F 2007/0059 with an open fluid circuit
• CPC Class Codes: A61F 2007/0062 the gas being steam or water vapour
• CPC Class Codes: A61F 2007/0063 for cooling
• CPC Class Codes: A61F 2007/0068 evaporating on the spot to be cooled
• CPC Class Codes: A61F 7/00 Heating or cooling appliances for medical or therapeutic treatment of the human body heating or cooling means in connection with bedsteads or mattresses A47C21/00 ; massage, therapeutic baths A61H; hyperthermia using electric or magnetic fields or ultrasound A61N; electric heating elements H05B
• CPC Class Codes: A61F 7/10 Cooling bags, e.g. ice-bags

Abstract

A method for transpulmonary cooling by providing a liquid having a boiling point of 38-300° C., more preferably 38-250° C., more preferably 38-200° C., more preferably 38-150° C., more preferably 38-80° C. The liquid is nebulized to form a mist. The mist is optionally cooled below room temperature and delivered to the airway of a patient so that the patient inhales the mist. The mist causes systemic cooling by evaporative heat loss when inhaled at room temperature and additionally by direct heat transfer when inhaled below room temperature. Compositions and medical devices for transpulmonary cooling are also provided.

Claims

1. A method for transpulmonary cooling, comprising the steps of:

providing a liquid having a boiling point of 38-300°

C.;

nebulizing the liquid to form a mist; and

delivering the mist to the airway of a patient so that the patient inhales the mist to cause systemic cooling.

2. The method of claim 1, wherein the liquid has a boiling point of 38-200°

C.

3. The method of claim 1, wherein the liquid has a boiling point of 38-150°

C.

4. The method of claim 1, wherein the liquid or liquid mist is cooled to below body temperature before delivery.

5. The method of claim 1, wherein the liquid or liquid mist is cooled to 10°

C. or less before delivery.

6. The method of claim 1, wherein the liquid comprises at least one highly fluorinated compound.

7. The method of claim 6, wherein the at least one highly fluorinated compound comprises a linear compound.

8. The method of claim 6, wherein the at least one highly fluorinated compound comprises a branched compound.

9. The method of claim 6, wherein the at least one highly fluorinated compound comprises a cyclic compound.

10. The method of claim 6, wherein the at least one highly fluorinated compound comprises a saturated compound.

11. The method of claim 6, wherein the at least one highly fluorinated compound comprises an unsaturated compound.

12. The method of claim 6, wherein the at least one highly fluorinated compound comprises at least one heteroatom.

13. The method of claim 6, wherein the at least one highly fluorinated compound comprises at least one hydrogen.

14. The method of claim 6, wherein the highly fluorinated compound comprises at least one halogen.

15. The method of claim 1, wherein the liquid is a fluorocarbon.

16. The method of claim 6, wherein the highly fluorinated compound is a perfluoroalkane of the formula C_nF_2n+2.

30. The method of claim 1, wherein the liquid mist further comprises at least one additional fluorinated component.

31. The method of claim 30, wherein the at least one additional fluorinated component boils below 37°

C.

17-29. -29. (canceled)

32-63. -63. (canceled)

64. A composition for transpulmonary cooling, comprising:

a nebulized liquid in the form of a mist, the liquid having a boiling point of 38-300°

C.

65-111. -111. (canceled)

112. A medical device for transpulmonary cooling, comprising:

an inhaler device; and

a nebulized liquid in the form of a mist the liquid having a boiling point of 38-300°

C.

113-149. -149. (canceled)

150. A method for transpulmonary cooling, comprising the steps of:

providing a liquid fluorocarbon;

nebulizing the liquid to form a mist;

delivering the mist to the airway of a patient so that the patient inhales the mist to cause systemic cooling;

recovering the fluorocarbon from an expired gas; and

recirculating the recovered fluorocarbon to the patient.

151. (canceled)