Thermal treatment system and method for maintaining integrity and ensuring sterility of surgical drapes used with surgical equipment

• US 6,091,058 A
• Filed: 03/23/1998
• Issued: 07/18/2000
• Est. Priority Date: 04/26/1995
• Status: Expired due to Term

• Current Assignee: Microtek Medical Incorporated (Ecolab, Inc.)
• Original Assignee: OR Solutions Inc (Ecolab, Inc.)
• Inventors: Faries, Durward I. Jr., Blankenship, Calvin, Heymann, Bruce R.
• Primary Examiner(s): PELHAM, JOSEPH MOORE
• Application Number:
  US09/046,090
• Time in Patent Office: 848 Days
• Field of Search: 219/430, 219/433, 219/435, 219/438, 219/452, 219/502, 219/506, 219/540, 219/552, 219/553, 128/898, 604/114, 604/291, 4/655
• US Class Current: 219/430
• CPC Class Codes: A61B 2050/002 having adhesive means, e.g. an adhesive strip
• CPC Class Codes: A61B 46/10 specially adapted for instruments, e.g. microscopes
• CPC Class Codes: A61F 7/0085 Devices for generating hot or cold treatment fluids

Abstract

A thermal treatment system warming basin for warming a sterile liquid or medium includes a heating pad disposed on the exterior surface of the basin floor in various configurations (e.g., spiral, `I`, `X` or serpentine configurations, multiple heating pad segments disposed about the basin floor, etc.) to prevent damage to a sterile surgical drape placed over the system when objects are placed within the basin. The configurations cover a portion of the basin floor to permit the basin to absorb thermal energy that may otherwise be absorbed by and cause damage to the drape. In addition, a thermal treatment system and corresponding sterile surgical drape may include a variety of mechanisms to ensure sterility of a sterile liquid within a basin. In particular, the drape may include a reflective material segment to reflect infrared light emitted from an infrared light source toward a detector to indicate the proper positioning and/or presence of the drape on the thermal treatment system. The infrared light source and corresponding detector may be disposed within the thermal treatment system below the basin or within the system top surface. Alternatively, magnetic media may be attached to the drape, while a magnetic detector is disposed within the thermal treatment system on the exterior surface of the basin floor or within the system top surface. The magnetic detector senses the drape magnetic media to detect the proper positioning and/or presence of the drape on the thermal treatment system.

Claims

1. An apparatus for ensuring sterility of a sterile medium contained within a thermal treatment system basin by controlling thermal treatment of the basin in response to detecting the presence of a sterile drape, providing a sterile field for the sterile medium, on the thermal treatment system, said apparatus comprising:

a thermal treatment system for thermally treating the sterile medium, said thermal treatment system including a basin;

a surgical drape covering and substantially conforming to said basin to serve as a drape container and to provide a sterile field for the sterile medium, said surgical drape including a surgical drape identifier for indicating the presence of said surgical drape on said thermal treatment system;

a detector disposed within said thermal treatment system to sense said surgical drape identifier and to verify the presence of said surgical drape on said thermal treatment system; and

a controller to enable said thermal treatment system to thermally treat the sterile medium in response to said detector verifying the presence of said surgical drape on said thermal treatment system.

2. The apparatus of claim 1 wherein said detector is disposed within said thermal treatment system below said basin.

3. The apparatus of claim 2 wherein said identifier includes a bar code and said detector includes a bar code reader.

4. The apparatus of claim 1 wherein said detector is disposed within a top surface of said thermal treatment system.

5. The apparatus of claim 1 wherein said surgical drape identifier includes a reflective material segment.

6. The apparatus of claim 5 wherein said detector includes:

an infrared light source for emitting infrared light; and

an infrared light detector for detecting said infrared light emitted from said infrared light source and reflected by said reflective material segment to verify the presence of said surgical drape on said thermal treatment system.

7. The apparatus of claim 6 wherein said controller includes:

a power supply to provide power to said infrared light source and detector;

a temperature controller to control thermal treatment of the sterile medium; and

an opticoupler to receive signals from said infrared detector and enable power to said temperature controller to thermally treat the sterile medium in response to the infrared detector sensing the presence of said drape.

8. The apparatus of claim 1 wherein:

said surgical drape identifier includes placement indicia to direct placement of said drape over said thermal treatment system and within said basin;

said detector senses the surgical drape identifier to verify the proper positioning and presence of said surgical drape on said thermal treatment system; and

said controller enables said thermal treatment system to thermally treat the sterile medium in response to said detector verifying the proper positioning and presence of said drape on said thermal treatment system.

9. The apparatus of claim 1 wherein said surgical drape identifier includes a magnetic medium.

10. The apparatus of claim 9 wherein said detector includes a magnetic detector for sensing said magnetic medium to verify the presence of said surgical drape on said thermal treatment system.

11. The apparatus of claim 10 wherein said magnetic detector is disposed on the underside of said basin for sensing said magnetic medium through said basin to verify the presence of said drape on said thermal treatment system.

12. The apparatus of claim 1 wherein:

said thermal treatment system further includes a plurality of basins; and

said surgical drape covers and substantially conforms to each said basin to serve as a drape container for that basin and to provide a sterile field for the sterile medium.

13. The apparatus of claim 12 wherein:

said surgical drape includes a plurality of surgical drape identifiers;

said apparatus includes a plurality of detectors with each detector sensing a corresponding surgical drape identifier and generating a signal to indicate the presence of said surgical drape on said thermal treatment system; and

said controller enables said thermal treatment system to thermally treat the sterile medium in response to a predetermined combination of signals from said detectors collectively verifying the presence of said surgical drape on said thermal treatment system.

14. The apparatus of claim 1 wherein said identifier includes a bar code and said detector includes a bar code reader.

15. The apparatus of claim 1 wherein said thermal treatment system further includes a heater disposed proximate a floor of said basin to heat the sterile medium, wherein said heater includes a configuration to apply thermal energy only to selected portions and less than the entirety of said basin floor.

16. A method of ensuring sterility of a sterile medium contained within a thermal treatment system basin by detecting the presence of a sterile surgical drape disposed over a thermal treatment system wherein the sterile surgical drape provides a sterile field above the basin, said method comprising the steps of:

(a) physically placing a drape identifier on surgical drapes;

(b) verifying the presence of a drape placed on the thermal treatment system by detecting in the thermal treatment system said drape identifier of said drape placed on the thermal treatment system; and

(c) enabling temperature control of the basin only in response to said detector verifying the presence of said drape on said thermal treatment system.

17. The method of claim 16 wherein step (b) further includes:

(b.1) verifying the presence of a drape placed on the thermal treatment system by detecting said drape identifier via a detector disposed below the basin.

18. The method of claim 17 wherein said drape identifier is a bar code, and step (b.1) further includes:

(b.1.1) verifying the presence of a drape placed on the thermal treatment system by detecting said bar code via a bar code reader disposed below the basin.

19. The method of claim 16 wherein step (b) further includes:

(b.1) verifying the presence of a drape placed on the thermal treatment system by detecting said drape identifier via a detector disposed within a top surface of the thermal treatment system.

20. The method of claim 16 wherein said drape identifier includes a reflective material segment, wherein the thermal treatment system includes an infrared light source for emitting infrared light and an infrared light detector for detecting infrared light, and step (b) further includes:

(b.1) detecting in the thermal treatment system, via said infrared light detector, infrared light emitted from said infrared light source and reflected by said reflective material segment to verify the presence of said drape on the thermal treatment system.

21. The method of claim 16 wherein step (a) further includes:

(a.1) physically placing said drape identifier on surgical drapes to serve as placement indicia for directing placement of said drapes over said thermal treatment system and within said basin;

step (b) further includes;

(b.1) sensing the surgical drape identifier to verify the proper positioning and presence of said drape on said thermal treatment system; and

step (c) further includes;

(c.1) enabling temperature control of said basin only in response to verifying the proper positioning and presence of said drape on said thermal treatment system.

22. The method of claim 16 wherein said drape identifier includes a magnetic medium, and step (b) further includes:

(b.1) detecting in the thermal treatment system, via a magnetic detector, said magnetic medium to verify the presence of said drape on the thermal treatment system.

23. The method of claim 22 wherein said magnetic detector is disposed on the underside of the basin, and step (b.1) further includes:

(b.1.1) detecting said magnetic medium through the basin, via said magnetic detector, to verify the presence of said drape on the thermal treatment system.

24. The method of claim 16 wherein said thermal treatment system further includes a plurality of basins, and said surgical drape covers and substantially conforms to each said basin to serve as a drape container for that basin and to provide a sterile field for the sterile medium, and step (c) further includes:

(c.1) enabling temperature control of said basins in response to said detector verifying the presence of said surgical drape on said thermal treatment system.

25. The method of claim 24 wherein said thermal treatment system further includes a plurality of detectors, and step (a) further includes:

(a.1) physically placing a plurality of surgical drape identifiers on each of said surgical drapes with each identifier corresponding to one of said detectors;

step (b) further includes;

(b.1) sensing each surgical drape identifier and generating a signal, via the corresponding detector, to verify the presence of said surgical drape on said thermal treatment system; and

step (c) further includes;

(c.1) enabling temperature control of the sterile medium in response to a predetermined combination of signals from said detectors collectively verifying the presence of said surgical drape on said thermal treatment system.

26. The method of claim 16 wherein said drape identifier includes a bar code, and step (b) further includes:

(b.1) verifying the presence of a drape placed on the thermal treatment system by detecting said bar code in the thermal treatment system via a bar code reader.

27. The method of claim 16 wherein the thermal treatment system further includes a heater disposed proximate a floor of said basin to heat the sterile medium, and step (c) further includes:

(c.1) applying thermal energy only to selected portions and less than the entirety of said basin floor via said heater in response to detection of said drape identifier.