Apparatus for identifying and tracking multiple tools and disposables

• US 8,193,938 B2
• Filed: 02/12/2009
• Issued: 06/05/2012
• Est. Priority Date: 02/12/2009
• Status: Active Grant

• Current Assignee: Steris Corporation
• Original Assignee: Haldor Advanced Technologies Ltd
• Inventors: Poremba, Jacob, Halberthal, Reuven
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US12/369,762
• Publication Number:
  US 20100201487A1
• Time in Patent Office: 1,209 Days
• Field of Search: 340/572.1, 340/572.7, 340/572.8, 340/10.1, 343/741, 343/742
• US Class Current: 340/572.7
• CPC Class Codes: A61B 2090/0805 automatically, e.g. by means of magnetic, optical or photoelectric detectors
• CPC Class Codes: A61B 50/36 for collecting or disposing of used articles
• CPC Class Codes: A61B 90/90 Identification means for patients or instruments, e.g. tags
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders
• CPC Class Codes: G06K 7/10168 the powering being adversely affected by environmental influences, e.g. unwanted energy loss in the interrogation signal due to metallic or capacitive objects in the proximity of the interrogation device or in the proximity of the interrogated record carrier
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10356 using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

A method and apparatus for identifying and tracking instruments, in multiple instrument environments such as an operating room or a garage. Each instrument or disposable has attached thereto an identifying tag, such as an RFID tag. Each plane or location the instruments or disposables are placed on, comprises an antenna and thus continuously identifies the tools. In order for the antenna to work in a metallic environment, the antenna is equipped with a metallic board underneath, which insulates form other metals, and in order for the metallic board not to absorb all the energy, a spacing layer is placed between the metal board and the antenna. Flat antennas may be implemented as a collection of wire loops, overlapping in about 20% of one of their dimensions.

Claims

1. A flat identification antenna for receiving signals from multiple tags, attached to tools or disposables placed on the antenna, the antenna comprising:

at least two planar loops made of conductive material, each loop partially overlapping with at least one other loop of the at least two loops;

a substantially flat conductive board positioned at a constant distance from said at least two planar loops in parallel thereto; and

a spacing layer, for keeping the constant distance between the at least two planar loops and the conductive board.

2. The antenna of claim 1 wherein the antenna emits a signal having a radio frequency, and the tag is a Radio Frequency Identification (RFID) tag.

3. The antenna of claim 1 wherein the at least two planar loops are of a substantially rectangular shape having a first dimension and a second dimension, and wherein the at least two planar loops substantially fully overlap in the first dimension, and overlap by about 20 percents in the second dimension.

4. The antenna of claim 1 further comprising an insulating top cover or base cover.

5. The antenna of claim 1 wherein the flat conductive board and the spacing layer have width and length substantially equal to the width and length of an operation room instrument table, or of a table top of a Mayo.

6. The antenna of claim 1 wherein the at least two loops are attached to an FR4 board.

7. The antenna of claim 1 wherein the spacing layer comprises crisscross spacing elements.

8. The antenna of claim 1 wherein the conductive board comprises an FR4 board covered with a conductive layer on its upper and lower planes.

9. The antenna of claim 1 wherein each of the at least two loops comprises a capacitor.

10. The antenna of claim 1 wherein information regarding the tag is transferred by the antenna to a reader, and wherein information from the reader is transferred to a computing platform.

11. The antenna of claim 10 wherein the computing platform executes at least one application selected from the group consisting of:

registering a collection of said tools which are available at a beginning of an operation, each of the tools in the collection having a tag identifiable by said antenna;

adding tools to the collection;

removing tools from the collection;

providing a first report on all tools from the collection not identified in a preceding predetermined period of time; and

providing a second report about tools used during said operation that have to undergo special maintenance.

12. The antenna of claim 11 wherein said collection of tools includes medical instruments and/or disposables available at a beginning of a surgery operation.

13. The antenna of claim 12 wherein said computing platform is further configured to enable operating room personnel and Central Sterilizing Supply Unit personnel to communicate regarding a condition of said instruments.

14. An identification bin configured for receiving signals from multiple tags attached to tools or disposables placed within the bin, the bin comprising:

an internal bucket made of insulating material, having attached to its external surface two or more loops made of conductive material;

an external bucket made of insulating material;

a conductive layer attached to the internal surface of the external bucket; and

a spacer for forming a constant distance between said internal and external buckets.

15. A tool to be identified by an identifying antenna, the tool comprising:

at least one operative part;

a tag-holding part, comprising;

a tag;

a housing for the tag comprising a first flat ring and a second flat ring attached to a flat side of the first flat ring, wherein the first ring has an external diameter equal to the external diameter of the second ring, the first ring has an internal diameter larger than the internal diameter of the second ring, the internal diameter of the second ring is compatible with the diameter of the tag, and the first and the second rings having a notch; and

an insulating cover for covering the tag and the first ring, excluding at least one area in which the first ring is connected to the at least one operative part.