Carbon dioxide detector having borosilicate substrate

• US 8,420,405 B2
• Filed: 09/25/2006
• Issued: 04/16/2013
• 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:
  US11/526,369
• Publication Number:
  US 20080083265A1
• Time in Patent Office: 2,395 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, 435/13, 435/283.1, 435/287.1, 435/287.7, 435/287.8, 435/287.9, 435/288.7
• US Class Current: 436/169
• CPC Class Codes: G01N 33/004 for CO, CO2
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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 method of detecting carbon dioxide concentration in an air sample comprising:

exposing a carbon dioxide detector to the air sample, wherein the carbon dioxide detector comprises;

a borosilicate substrate, having an acrylic binder; and

;

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

determining the color of the indicator solution, wherein the color of the indicator solution indicates the carbon dioxide concentration in the air sample.

2. The method according to claim 1, wherein the air sample comprises air inhaled by a patient.

3. The method according to claim 1, wherein the air sample comprises air exhaled by a patient.

4. The method according to claim 1, wherein the air sample comprises air from a resuscitator.

5. The method according to claim 1, wherein the air sample comprise air from an endotracheal tube.

6. The method according to claim 1, wherein determining the color of the indicator solution occurs between approximately 5 and 20 seconds after exposing the carbon dioxide detector to the air sample.

7. The method according to claim 1, wherein a color of the indicator solution indicates a carbon dioxide concentration of less than approximately 0.5% in the air sample.

8. The method according to claim 1, wherein a color of the indicator solution indicates a carbon dioxide concentration of at least approximately 2% in the air sample.

9. The method according to claim 1, wherein a color of the indicator solution indicates a carbon dioxide concentration of between approximately 0.5% and 2% in the air sample.

19. The method of claim 1, wherein a color of the indicator solution indicates a carbon dioxide concentration greater than 5%.

20. The method of claim 1, wherein the indicator solution includes four colors, the first color indicates a carbon dioxide concentration of less than approximately 0.5% in the air sample, the second color indicates a carbon dioxide concentration of between approximately 0.5% to 2% in the air sample;

the third color indicates a carbon dioxide concentration of between approximately 2% to 5% in the air sample; and

the fourth color indicates a carbon dioxide concentration of greater than approximately 5% in the air sample.

10. A method of detecting carbon dioxide in a breath-to-breath manner comprising:

attaching to a subject a carbon dioxide detector having;

a borosilicate substrate having an acrylic binder; and

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

determining whether carbon dioxide is present in respired air during at least every breath of the subject in a time interval.

11. The method of detecting carbon dioxide according to claim 10, wherein the time interval ranges from approximately 1 second to approximately 20 seconds.

12. The method of detecting carbon dioxide according to claim 10, wherein the time interval ranges from approximately 3 seconds to approximately 6 seconds.

13. The method of detecting carbon dioxide according to claim 10, wherein the interval is approximately 5 seconds.

14. A method of detecting carbon dioxide comprising:

providing an air sample to a carbon dioxide detector having;

a borosilicate substrate having an acrylic binder; and

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

measuring the carbon dioxide in the air sample, wherein the indicator responds to the carbon dioxide in a time interval ranging from approximately 1 second to 20 seconds.

15. The method of detecting carbon dioxide according to claim 14, wherein the time interval ranges from approximately 1 to approximately 5 seconds.

16. A method for determining whether a gaseous sample contains a concentration of carbon dioxide, comprising:

contacting the gaseous sample with a carbon dioxide detector having a carbon dioxide sensitive indicator disposed on a borosilicate substrate to detect carbon dioxide in the gaseous sample and wherein the borosilicate substrate comprises an acrylic binder.

17. The method according to claim 16, wherein contacting occurs for a diagnostically effective period of time.

18. The method according to claim 16, comprising:

replacing the gaseous sample with the second gaseous sample; and

contacting the second gaseous sample with the carbon dioxide detector to detect carbon dioxide in the second gaseous sample.