Process challenge device

• US 6,773,898 B1
• Filed: 09/09/2002
• Issued: 08/10/2004
• Est. Priority Date: 09/09/2002
• Status: Expired due to Fees

• Current Assignee: Raven Biological Laboratories, Inc. (Mesa Laboratories Inc.)
• Original Assignee: Raven Biological Laboratories, Inc. (Mesa Laboratories Inc.)
• Inventors: Dwyer, Daniel J., Nyberg, Russell, Dwyer, Robert V. Jr.
• Primary Examiner(s): Redding, David A.
• Application Number:
  US10/238,436
• Time in Patent Office: 701 Days
• Field of Search: 422/58, 422/59, 435/31, 435/287.4, 435/287.7, 435/288.7
• US Class Current: 435/31
• CPC Class Codes: A61L 2/28 Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour apparatus involving enzymes or microorganisms C12M1/34; methods involving enzymes or microorganisms C12Q1/00

Abstract

A process challenge device and method of using the same is presented for testing the efficiency of various sterilization procedures on objects to be sterilized. The device is assembled from two tapered end portions having opposite open ends and an open pathway extending therethrough. A central chamber in the open pathway receives a Biological Indicator for testing the efficiency of the sterilization process. The device is ideal for testing a sterilization process on elongated objects such as tubing, at any point along their length. The coupling structures on the end portions provide the device with single-use security.

Claims

1. A device for testing the effectiveness of a sterilization procedure and a sterilant, the device comprising:

a housing having an open first end portion, an open second end portion, and an open pathway extending between said first and second end portions through which sterilant travels; and

a Biological Indicator comprising a sample of biological organisms having known resistance characteristics;

said open pathway being adapted to receive the Biological Indicator so that the Biological Indicator is exposed to the sterilant during the sterilization procedure.

2. The device of claim 1 wherein the first end portion is shaped to generally taper toward the opening in said first end portion.

3. The device of claim 1 further comprising an indicator chamber formed in the pathway of said housing intermediate the openings of said first and second end portions.

4. An in-line process challenge device for testing the effectiveness of a sterilization procedure and a sterilant used during the sterilization procedure, the process challenge device comprising:

a first housing portion having a first opening and a first coupling surface;

a second housing portion having a second opening and a second coupling surface;

said first and second coupling surfaces being adapted to be operatively connected to one another so that said first opening and said second opening are placed in open communication with one another and allow sterilant to pass through the device;

means for securing said first and second coupling surfaces to one another;

means for substantially preventing the sterilant from penetrating between the first housing portion and the second housing portion during the sterilization procedure; and

a Biological Indicator positioned intermediate said first and second openings.

5. The device of claim 4 wherein the first housing portion is shaped to generally taper toward the first opening in said first housing portion.

6. The device of claim 5 wherein the second housing portion is shaped to generally taper toward the second opening in said second housing portion.

7. The device of claim 4 further comprising an indicator chamber formed in the pathway of said housing intermediate the first and second openings.

8. A method for testing the effectiveness of a sterilization procedure, comprising the steps of:

(a) providing a process challenge device, comprising;

(i) a housing having an open first end portion, an open second end portion, and an open pathway extending between said open first and second end portions through which sterilant travels; and

(ii) a Biological Indicator disposed in said open pathway intermediate said open first and second end portions;

(b) operatively connecting the process challenge device to an object to be sterilized;

(c) subjecting the process challenge device and the object to a sterilization procedure; and

(d) examining the Biological Indicator.

9. The method of claim 8 wherein said first end portion and said second end portion are separate structures;

said first end portion being provided with a first coupling surface and said second end portion being provided with a second coupling surface;

said first and second coupling surfaces being adapted to be operatively secured to one another.

10. The method of claim 9 further comprising a gasket disposed between the first coupling surface and the second coupling surface to substantially prevent the sterilant from penetrating between the first end portion and the second end portion during the sterilization procedure.

11. The method of claim 9 further comprising a first locking tab extending from the first coupling surface and a first receptacle formed in the second coupling surface;

said first receptacle being adapted to operatively receive said first locking tab when the first end portion and the second end portion of said housing are operatively connected to one another.

12. The method of claim 11 further comprising a second locking tab extending from the second coupling surface and a second receptacle formed in the first coupling surface;

said second receptacle being adapted to operatively receive said second locking tab when the first end portion and the second end portion of said housing are operatively connected to one another.

13. The method of claim 8 wherein the first end portion is shaped to generally taper toward the opening in said first end portion.

14. The method of claim 13 wherein the second end portion is shaped to generally taper toward the opening in said second end portion.

15. The method of claim 8 further comprising an indicator chamber formed in the pathway of said housing intermediate the open first and second end portions.

16. The method of claim 9 further comprising the step of separating the first end portion from the second end portion prior to examining the biological indictor.

17. The method of claim 16 wherein the first end portion and second end portion are separated so that an operative connection cannot be made between the first and second end portions after separation.

18. A device for testing the effectiveness of a sterilization procedure and a sterilant, the device comprising:

a housing having an open first end portion, an open second end portion, and an open pathway extending between said first and second end portions through which sterilant travels; and

a Biological Indicator;

said open pathway being adapted to receive the Biological Indicator so that the Biological Indicator is exposed to the sterilant during the sterilization procedure;

said housing being comprised of material that is substantially liquid impermeable and substantially gas non-absorptive.

19. A device for testing the effectiveness of a sterilization procedure and a sterilant, the device comprising:

a housing having an open first end portion, an open second end portion, and an open pathway extending between said first and second end portions through which sterilant travels; and

a Biological Indicator;

said open pathway being adapted to receive the Biological Indicator so that the Biological Indicator is exposed to the sterilant during the sterilization procedure;

said first end portion and said second end portion being separate structures;

said first end portion being provided with a first coupling surface and said second end portion being provided with a second coupling surface;

said first and second coupling surfaces being adapted to be operatively secured to one another.

20. The device of claim 19 further comprising a gasket disposed between the first coupling surface and the second coupling surface to substantially prevent the sterilant from escaping from between the first end portion and the second end portion during the sterilization procedure.

21. The device of claim 19 further comprising a first locking tab extending from the first coupling surface and a first receptacle formed in the second coupling surface;

said first receptacle being adapted to operatively receive said first locking tab when the first end portion and the second end portion of said housing are operatively connected to one another.

22. The device of claim 21 further comprising a second locking tab extending from the second coupling surface and a second receptacle formed in the first coupling surface;

said second receptacle being adapted to operatively receive said second locking tab when the first end portion and the second end portion of said housing are operatively connected to one another.

23. A device for testing the effectiveness of a sterilization procedure and a sterilant, the device comprising:

a housing having an open first end portion, an open second end portion, and an open pathway extending between said first and second end portions; and

a Biological Indicator;

said open pathway being adapted to receive the Biological Indicator so that the Biological Indicator is exposed to the sterilant during the sterilization procedure;

said first end portion being shaped to generally taper toward the opening in said first end portion;

said second end portion being shaped to generally taper toward the opening in said second end portion.