Heated reprocessing of physiological sensors

• US 9,924,897 B1
• Filed: 06/08/2015
• Issued: 03/27/2018
• Est. Priority Date: 06/12/2014
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Abdul-Hafiz, Yassir Kamel
• Primary Examiner(s): Vaughan, Jason L
• Application Number:
  US14/733,808
• Time in Patent Office: 1,023 Days
• Field of Search: 156703, 156704, 156711
• CPC Class Codes: A61B 2562/12 Manufacturing methods specially adapted for producing sensors for in-vivo measurements
• CPC Class Codes: A61B 2562/245 Means for cleaning the sensor in-situ or during use, e.g. hygienic wipes
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor

Abstract

Methods of reprocessing physiological sensors may include applying heat to a physiological sensor so as to efficiently remove adhesives, adhesive layers, and/or other disposable components of the sensor. Heat may be applied to the physiological sensor efficiently via a medium, such as an aqueous solution (for example, water). Reusable components of the physiological sensor may then be reassembled with new disposable components and/or adhesives to produce a reprocessed sensor. The methods may further include testing and/or replacement of various reusable sensor components, testing of the reprocessed sensor, cleaning of the reprocessed sensor and/or sensor components, and/or sterilization of the reprocessed sensor, among other steps.

Claims

1. A method for reprocessing a previously used physiological sensor, the method comprising:

moving the sensor on a conveyor belt;

applying, during a first phase, heat to the sensor via a first medium, wherein the first medium includes at least one of;

radiant heat, a fluid bath, a fluid spray, or a fluid steam;

after the first phase, further moving the sensor on the conveyor belt;

applying, during a second phase occurring after the first phase, heat to the sensor via a second medium, wherein the second medium is a different medium from the first medium;

applying to the sensor, during the first phase and/or second phase, at least one of;

agitation, vibration, or ultrasonic waves;

disassembling the sensor into sensor components including one or more reusable sensor components; and

assembling a reprocessed sensor by attaching one or more new sensor components to at least one of the reusable sensor components.

2. The method of claim 1, wherein the first medium includes a fluid.

3. The method of claim 2, wherein the fluid comprises at least one of water, an aqueous agent or solution, a semi-aqueous agent, a hydrocarbon based solvent, a halogenated solvent, an oil, or any combination thereof.

4. The method of claim 1, wherein the heat enables disassembly of the sensor.

5. The method of claim 1, wherein the heat at least partially loosens, weakens, melts, softens, or dissolves an adhesive of the sensor.

6. The method of claim 1, wherein the heat is applied to the sensor sufficient to enable efficient removal of adhesives, adhesive layers, or tape layers.

7. The method of claim 1 further comprising:

applying further processes to the sensor, wherein the further processes include at least one of;

mechanical, chemical, or thermal.

8. The method of claim 1, wherein the second medium includes at least one of:

radiant heat, a fluid bath, a fluid spray, or a fluid steam.

9. The method of claim 1 further comprising:

removing one or more adhesive components of the sensor that are loosened by the applied heat.

10. The method of claim 9 further comprising:

determining one or more sensor components of the sensor to be replaced,

wherein disassembling the sensor comprises detaching the one or more sensor components to be replaced from the sensor.

11. The method of claim 10 further comprising:

determining whether sensing performance of the reprocessed sensor meets specified sensor performance criteria; and

sterilizing the reprocessed sensor in preparation for use.

12. The method of claim 10, wherein determining one or more sensor components comprises:

testing performance of the one or more sensor components to determine if the performance is within specification for the sensor component.

13. The method of claim 1, wherein the one or more reusable sensor components include at least one of an emitter or a detector.

14. The method of claim 1, wherein the sensor is a pulse oximetry sensor.

15. The method of claim 1, further comprising cleaning the sensor in order to remove visible contaminants.

16. The method of claim 1, wherein the one or more reusable sensor components includes a cable.