Wash monitor and method of use

Patent metadata

Field	Value
Publication number	US-10563245-B2
Application number	US-201314432807-A
Country	US
Kind code	B2
Filing date	Oct 1, 2013
Priority date	Oct 8, 2012
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

The present disclosure provides a monitoring device comprising a test composition, a test element comprising a test portion to which the test composition is releasably adhered, a detection reagent, and a container comprising a first end with an opening and a second end opposite the first end. The test composition comprises a predetermined quantity of tracer analyte. The container is configured to receive the test portion and configured to be operationally coupled to an analytical instrument. The tracer analyte and the detection reagent each are capable of participating in one or more chemical reaction that results in the formation of a detectable product. A method of using the monitoring device to assess the efficacy of a washing process is also provided.

First claim

The invention claimed is:

1. A monitoring device, made by the following process:
depositing a test composition comprising a predetermined quantity of tracer analyte onto a test portion of a movable test element, the test element comprising a handle for grasping the test element;
depositing a detection reagent into a container, the container comprising a first end with an opening, a second end opposite the first end, and a frangible seal;
wherein a receiving chamber is disposed on a first side of the frangible seal proximate the opening and a cuvette chamber is disposed on a second side of the frangible seal distal the opening;
wherein the container is configured to receive the test portion and configured to be operationally coupled to an analytical instrument; and

wherein the test element is configured to be able to actuate the frangible seal;
positioning the test element relative to the container such that at least a portion of the test element extends through the opening into the container;
wherein at least a portion of the handle extends outside the container;

wherein the test element is configured to be able to actuate the frangible seal;
wherein the tracer analyte and the detection reagent each are capable of participating in one or more chemical reaction that results in the formation of a detectable product.

2. The monitoring device of claim 1 , wherein the test portion comprises at least one recessed area, wherein the test composition is adhered in the recessed area.

3. The monitoring device of claim 1 , further comprising a secural element configured to releasably hold the monitoring device at a fixed location within an automated washer.

4. The monitoring device of claim 3 , wherein the secural element comprises one or more engagement structures configured to hold a portion of an automated washer rack or a wire basket.

5. The monitoring device of claim 1 , wherein the predetermined quantity is a known quantity.

6. A system for testing the efficacy of a washing process, comprising:
a monitoring device comprising a test element that includes a test portion to which a test composition comprising a known quantity of a tracer analyte is releasably adhered according to claim 1 ; and
an analytical instrument capable of detecting the detectable product;
wherein the container is configured to receive the test portion and configured to be operationally coupled to the analytical instrument.

7. A method of assessing the efficacy of a washing process, comprising:
exposing the test portion of a monitoring device according to claim 1 to the washing process;
after exposing the test portion to the washing process, contacting the test portion with the detection reagent in the container; and
using the analytical instrument to detect a presence or an absence of the detectable product;
wherein the presence of the detectable product indicates a presence of tracer analyte on the test portion after exposing the test portion to the washing process.

8. The method of claim 7 , wherein exposing the test portion to the washing process comprises placing the test portion into an automated washer and performing at least a portion of an automated wash cycle while the test portion is disposed in the automated washer.

9. The method of claim 7 , wherein using the analytical instrument to detect a presence or an absence of the detectable product comprises using the analytical instrument to measure a quantity of the tracer analyte.

10. The method of claim 9 , wherein exposing the test portion of a monitoring device comprises exposing the test portion of a plurality of monitoring devices, wherein the method further comprises positioning a first monitoring device at a first predefined location in the automated washer and positioning a second monitoring device at a second predefined location in the automated washer.

11. The method of claim 10 , further comprising the step of comparing a measured quantity of tracer analyte associated with the first monitoring device to a measured quantity of tracer analyte associated with the second monitoring device.

12. The method of claim 9 , further comprising comparing at least one measured quantity of the tracer analyte to a predefined standard.

13. The method of claim 7 , further comprising the step of placing the test portion of the monitoring device in a receiver configured to restrict fluidic accessibility to the test portion.

14. The method of claim 7 further comprising, before exposing the test portion of the monitoring device to the washing process, positioning at least a part of the test portion of the monitoring device in a process challenge device.

15. A method of processing an object to be decontaminated, comprising:
processing as a single batch in a decontamination process:
an object having an unknown amount of biological soil disposed thereon and/or therein;
a monitoring device comprising a predetermined quantity of tracer analyte according to claim 1 ;

after exposing the test portion to the decontamination process, contacting the test portion with the detection reagent in the container; and
using the analytical instrument to detect a presence or an absence of the detectable product;
wherein the presence of the detectable product indicates a presence of the tracer analyte on the test portion after exposing the test portion to the washing process.

16. The method of claim 15 , wherein processing the object and the monitoring device in a decontamination process comprises processing the object and the monitoring device in an automated washer or an automated washer-disinfector.

17. The method of claim 15 , wherein processing as a single batch in a decontamination process the object and the monitoring device comprises processing as a single batch in a decontamination process the object and a plurality of the monitoring devices.

18. The method of claim 15 , wherein detecting a presence or an absence of the detectable product further comprises calculating a quantity of tracer analyte remaining on the test portion after exposing the test portion to the decontamination process.

19. The method of claim 18 , further comprising comparing the quantity of tracer analyte remaining on the test portion of at least one monitoring device after exposing the test portion to the decontamination process to a predetermined quantity of tracer analyte associated with an action limit.

20. The method of claim 19 , further comprising i) releasing the object for use in a first subsequent process if the quantity of tracer analyte remaining on the test portion of the at least one monitoring device after exposing the test portion to the decontamination process is less than or equal to the predetermined quantity or ii) releasing the object for use in a second subsequent process if the quantity of tracer analyte remaining on the test portion of the at least one monitoring device after exposing the test portion to the decontamination process is greater than or equal to the predetermined quantity.

21. A kit, comprising:
a container comprising a first end with an opening, a second end opposite the first end, and a frangible seal, wherein a receiving chamber is disposed on a first side of the frangible seal proximate the opening and a cuvette chamber is disposed on a second side of the frangible seal distal the opening, and wherein the container includes a detection reagent disposed therein; and
a movable test element made by a process of releasably depositing a test composition comprising

Assignees

• 3M Innovative Properties Co

Inventors

• Bommarito G Marco
• Liu Ting
• Nies Timothy J

Classifications

• Y10T436/13

  Tracers or tags · CPC title

• C12Q1/22

  Testing for sterility conditions · CPC title

• A61B2090/702

  Devices for testing the cleaning process, e.g. test soils · CPC title

• C12Y113/12007

  Photinus-luciferin 4-monooxygenase (ATP-hydrolysing) (1.13.12.7), i.e. firefly-luciferase · CPC title

• C12Q1/66 Primary

  involving luciferase · CPC title