Carbon dioxide detector having borosilicate substrate

• US 8,431,087 B2
• Filed: 09/25/2006
• Issued: 04/30/2013
• Est. Priority Date: 09/25/2006
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Ostrowski, Rafael, Debreczeny, Martin
• Primary Examiner(s): WHITE, DENNIS MICHAEL
• Application Number:
  US11/526,393
• Publication Number:
  US 20080078394A1
• Time in Patent Office: 2,409 Days
• Field of Search: 422/56, 422/57, 422/58, 422/400, 422/401, 422/420, 422/421, 422/422, 422/423, 422/424, 422/425, 422/426, 422/427, 422/428, 422/429, 422/68.1, 422/82.05, 422/82.06, 436/164, 436/169, 436/170, 436/900, 435/13, 435/283.1, 435/287.1, 435/287.7, 435/287.8, 435/287.9, 435/288.7
• US Class Current: 422/420
• CPC Class Codes: A61B 5/0836 Measuring rate of CO2 production
• CPC Class Codes: A61M 2016/103 the CO2 concentration
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)
• CPC Class Codes: B01J 20/10 comprising silica or silicate
• CPC Class Codes: B01J 20/2803 Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
• CPC Class Codes: B01J 20/28033 Membrane, sheet, cloth, pad, lamellar or mat
• CPC Class Codes: B01J 2220/49 Materials comprising an indicator, e.g. colour indicator, pH-indicator
• CPC Class Codes: G01N 31/223 for investigating presence of specific gases or aerosols G01N31/221, G01N31/222 take precedence; actuation of fire alarm by presence of smoke or gases G08B17/10

Abstract

The present disclosure relates to a carbon dioxide detector having a borosilicate substrate. It may also have a carbon dioxide responsive indicator solution disposed on the borosilicate substrate. The carbon dioxide detector may be part of a carbon dioxide detector system also including an air intake operably connected to the housing to allow air to reach the carbon dioxide detector. The carbon dioxide detector may include a borosilicate substrate and a carbon dioxide responsive indicator solution disposed on the borosilicate substrate. This detector may be part of a further system, such as a resuscitation system. The detector may be made by wetting a borosilicate substrate with a carbon dioxide responsive indicator solution and drying the indicator solution to immobilize it and form a dried carbon dioxide detector. It may be used to detect the concentration of carbon dioxide in an air sample by exposing the detector to the sample.

Claims

1. A carbon dioxide detector comprising:

a borosilicate substrate having an acrylic binder; and

a carbon dioxide responsive indicator solution disposed on the borosilicate substrate.

2. The carbon dioxide detector according to claim 1, wherein the borosilicate substrate comprises a fibrous borosilicate.

3. The carbon dioxide detector according to claim 2, wherein the fibrous borosilicate comprises a thin, highly porous mesh.

4. The carbon dioxide detector according to claim 1, wherein the borosilicate substrate contains less than approximately 5% acrylic binder by weight.

5. The carbon dioxide detector according to claim 1, wherein the borosilicate substrate contains less than approximately 5% acrylic binder by volume.

6. The carbon dioxide detector according to claim 1, wherein the carbon dioxide responsive indicator solution comprises an indicator.

7. The carbon dioxide detector according to claim 6, wherein the indicator comprises a chromogenic dye.

8. The carbon dioxide detector according to claim 6, wherein the indicator comprises cresol red.

9. The carbon dioxide detector according to claim 6, wherein the indicator comprises metacresol purple.

10. The carbon dioxide detector according to claim 6, wherein the indicator comprises at least one of thymol blue, phenol red, xylenol blue, a 3:

1 mixture of cresol red and thymol blue, bromothymol blue, neutral red, phenolphthalein, rosolic acid, α

-naphthelphthalein, or orange I, or any combinations thereof.

11. The carbon dioxide detector according to claim 1, wherein the indicator comprises a base.

12. The carbon dioxide detector according to claim 11, wherein the base comprises calcium hydroxide.

13. The carbon dioxide detector according to claim 11, wherein the base comprises at least one of sodium carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, magnesium hydroxide, potassium carbonate, sodium barbitol, tribasic sodium phosphate, dibasic sodium phosphate, potassium acetate, monoethanolamine, diethanolamine, or piperidine, or any combinations thereof.

14. The carbon dioxide detector according to claim 1, wherein the indicator solution comprises a hygroscopic, high-boiling, transparent, colorless, water-miscible liquid.

15. The carbon dioxide detector according to claim 14, wherein the water-miscible liquid comprises at least one of glycerol, propylene glycol, monoethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, or aliphatic alcohols, or any combinations thereof.

16. A carbon dioxide detector system comprising:

a carbon dioxide detector comprising;

a borosilicate substrate having an acrylic binder; and

a carbon dioxide responsive indicator solution disposed on the borosilicate substrate; and

a housing containing the carbon dioxide detector, the housing having an air intake to allow air to reach the carbon dioxide detector.

17. The carbon dioxide detector system according to claim 16, wherein the housing comprises a rectangular assembly.

18. The carbon dioxide detector system according to claim 16, wherein the housing comprises a cylindrical assembly.

19. The carbon dioxide detector system according to claim 16, wherein the housing comprises a clear portion.

20. The carbon dioxide detector system according to claim 16, wherein the housing comprises a rigid material.

21. The carbon dioxide detector system according to claim 16, wherein the housing comprises a clear colorless, transparent plastic.

22. The carbon dioxide detector system according to claim 16, wherein the housing comprises at least one of polyethylene, polypropylene, an acrylic polymer, polycarbonate, nylon, polysytrene, or styrene-acrylonitrile copolymer, or any combinations thereof.

23. The carbon dioxide detector system according to claim 16, wherein the air intake is releasably secured to the housing.

24. The carbon dioxide detector system according to claim 16, wherein the air intake is releasably secured to a further system.

25. The carbon dioxide detector system according to claim 16, wherein the air intake comprises a cylindrical assembly.

26. The carbon dioxide detector system according to claim 16, wherein the air intake comprises a rigid material.

27. The carbon dioxide detector system according to claim 16, wherein the air intake comprises a clear colorless, transparent plastic.

28. The carbon dioxide detector system according to claim 16, wherein the air intake comprises at least one of polyethylene, polypropylene, an acrylic polymer, polycarbonate, nylon, or polysytrene, styrene-acrylonitrile copolymer, or any combinations thereof.

29. The carbon dioxide detector system according to claim 16, comprising a color indicator.

30. The carbon dioxide detector system according to claim 29, wherein the color indicator includes at least one region having at least one color that matches a color of the indicator solution in the presence of a specific carbon dioxide concentration.

31. The carbon dioxide detector system according to claim 29, wherein the color indicator comprises:

at least a first region having at least one color that matches a color of the indicator solution in the presence of a low carbon dioxide concentration; and

at least a second region having at least one color that matches a color of the indicator solution in the presence of a high carbon dioxide concentration.

32. A carbon dioxide detector system comprising:

means for detecting carbon dioxide, the detecting means including a borosilicate substrate having an acrylic binder;

means for containing the detecting means; and

means for allowing air to reach the detecting means.

33. The carbon dioxide detector system according to claim 32, comprising means for providing at least one reference color for use in interpreting a color of the detecting means.

34. A resuscitation system comprising:

a carbon dioxide detector system having;

a carbon dioxide detector comprising;

a borosilicate substrate having an acrylic binder; and

a carbon dioxide responsive indicator solution disposed on the borosilicate substrate;

a housing containing the carbon dioxide detector, the housing having an air intake to allow air to reach the carbon dioxide detector;

a resuscitator housing fitted with the carbon dioxide detector system; and

a bag attached to the resuscitator housing.

35. The resuscitation system of claim 34, comprising an endotracheal tube operably coupled to the air intake.

36. The resuscitation system of claim 34, wherein the borosilicate substrate comprises an acrylic binder.

37. The resuscitation system of claim 34, wherein the carbon dioxide detection system comprises a color indicator having at least one reference color for use in interpreting a color of the indicator solution.