System for tracking surgical items in an operating room environment

• US 7,557,710 B2
• Filed: 12/27/2006
• Issued: 07/07/2009
• Est. Priority Date: 03/17/2006
• Status: Expired due to Fees

• Current Assignee: Med Wave LLC
• Original Assignee: Med Wave LLC
• Inventors: Sanchez, Michael, Parker, James, Ross, James, Beason, Charles, Dayton, Thomas
• Primary Examiner(s): Wu; Daniel
• Assistant Examiner(s): RUSHING, MARK S
• Application Number:
  US11/646,170
• Publication Number:
  US 20070268133A1
• Time in Patent Office: 923 Days
• Field of Search: 3405721-5729, 340/5.92, 340/825.49, 340/539.13, 235/385, 700/215, 700/224, 700/225, 700/226
• US Class Current: 340/572.1
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2090/0805 automatically, e.g. by means of magnetic, optical or photoelectric detectors
• CPC Class Codes: A61B 2090/378 using ultrasound
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 50/10 Furniture specially adapted for surgical or diagnostic appliances or instruments
• CPC Class Codes: A61B 90/13 guided by light, e.g. laser pointers
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders
• CPC Class Codes: G06Q 10/08 Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
• CPC Class Codes: G08B 13/2462 Asset location systems combined with EAS inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00
• CPC Class Codes: G16H 40/20 for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms
• CPC Class Codes: G16H 40/40 for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades

Abstract

A system for tracking and locating surgical items and objects in an operating room environment that incorporates two-stage functionality. A first stage provides mechanisms for tracking objects using radio frequency (RF) tags that are positioned on or in conjunction with every surgical item and object so as to be tracked by a number of RF transceivers located about the operating room. In addition to integrating RF ID components, the tags integrate hard spherical components that are easily identifiable by ultrasonic detection. If an object is “lost” from the tracking system functionality (RF tracking), the system operator may review a last known location and movement path presented on a display and thereafter utilize an ultrasonic sub-system in a localized area to detect the exact location of the missing object or item. Narrowing the location of a “lost” object is facilitated by the use of one or more LED laser pointers that are directed through the last known path of the object and to its last known location.

Claims

1. A system for tracking and locating medical utility items within a surgical environment, the system comprising:

(a) a plurality of tags, at least one tag associated with each medical utility item to be tracked, each tag comprising a radio frequency (RF) responsive element and an ultrasonic responsive element;

(b) at least one RF transceiver positioned within the surgical environment and for transmitting an RF signal to, and receiving an RF signal back from, the RF responsive element of each tag, the RF transceiver thereby tracking the locations of the tags, the RF transceiver further outputting signal information comprising the locations of the tags;

(c) a microprocessor receiving the signal information from the at least one RF transceiver and maintaining a log of the locations of the tags and determining if and when a tag is not being RF tracked by the RF transceivers;

(d) at least one display device associated with the microprocessor for displaying the log of the locations of the tags and for alerting a user if and when a tag is no longer being RF tracked, the at least one display device further for displaying at least one last known location of a tag that is no longer being RF tracked; and

(e) at least one ultrasonic transducer positioned within the surgical environment and for transmitting ultrasonic waves to, and receiving ultrasonic waves back from, the ultrasonic responsive element of each tag within a localized space associated with the at least one last known location of a tag that is no longer being RF tracked.

2. The system of claim 1 further comprising at least one pointing mechanism for being controlled by the microprocessor, the at least one pointing mechanism comprising a light source and a movable support, the microprocessor controlling the at least one pointing mechanism to point to the at least one last known location of a tag that is no longer being RF tracked.

3. The system of claim 2 wherein the light source comprises a collimated light source for projecting a narrow beam of light in a specified direction.

4. The system of claim 1 wherein the at least one RF transceiver comprises a directional RF receiver for outputting at least azimuthal orientation information regarding the locations of the tags.

5. The system of claim 1 wherein the at least one RF transceiver comprises at least one RF scanner/counter positioned to detect and count each of the medical utility items to be tracked as they are introduced into the surgical environment.

6. The system of claim 1 wherein the at least one RF transceiver comprises at least three RF transceivers, the at least three RF transceivers for triangulating the return RF signals from the tags.

7. The system of claim 1 wherein the plurality of tags each further comprise a support substrate and an encapsulating material, the RF responsive element and the ultrasonic responsive element each positioned on and supported by the support substrate and encapsulated therewith by the encapsulating material, the encapsulating material comprising a material that is generally transparent to the RF signal and to the ultrasonic waves.

8. The system of claim 1 wherein the RF responsive element of each of the plurality of tags comprises a distinct identification characteristic, said identification characteristic for being represented in the return RF signal traveling back from the tag to the RF transceiver and thereby identifying the tag and the medical utility item to which the tag is attached as apart from the balance of the items with tags.

9. The system of claim 8 wherein the distinct identification characteristic of each of the plurality of tags is previously stored in a data storage device associated with the microprocessor.

10. The system of claim 1 wherein the at least one display device further comprises a touch screen display for receiving touch input from a user, the touch input comprising an instruction to initiate the display of the at least one last known location of a tag that is no longer being RF tracked.

11. The system of claim 1 wherein the at least one last known location of a tag that is no longer being RF tracked comprises a time-sequence of a plurality of last known locations of a tag that is no longer being RF tracked.

12. The system of claim 11 wherein the time-sequence of a plurality of last known locations of a tag that is no longer being RF tracked comprises a set of last known locations over a selectable period of time.

13. The system of claim 1 further comprising a video imaging device operable in conjunction with the microprocessor to provide an image of the surgical environment, the image of the surgical environment for display on the at least one display device and facilitating the display of the at least one last known location of a tag that is no longer being RF tracked.

14. The system of claim 1 wherein the at least one display device comprises a first display device and a second display device, the first display device comprising a flat panel touch screen display device for displaying the log of the locations of the tags and the second display device comprising a device for displaying the at least one last known location of a tag that is no longer being RF tracked.

15. The system of claim 13 wherein the at least one display device comprises a first display device and a second display device, the first display device comprising a flat panel touch screen display device for displaying the log of the locations of the tags and the second display device comprising a device for displaying the at least one last known location of a tag that is no longer being RF tracked superimposed on the image of the surgical environment.

16. The system of claim 1 wherein at least one of the plurality of tags is attached to a medical utility item by enclosing the tag within a pocket formed on the medical utility item.

17. The system of claim 1 wherein at least one of the plurality of tags is attached to a medical utility item by adhering the tag to the medical utility item with a medically inert adhesive.

18. A system for tracking and locating medical utility items within a surgical environment, the system comprising:

(a) a plurality of tags, at least one tag associated with each medical utility item to be tracked, each tag comprising a radio frequency (RF) responsive element and an ultrasonic responsive element;

(b) at least one RF transceiver positioned within the surgical environment and for transmitting an RF signal to, and receiving an RF signal back from, the RF responsive element of each tag, the RF transceiver thereby tracking the locations of the tags, the RF transceiver further outputting signal information comprising the locations of the tags, the RF responsive element of each of the plurality of tags further comprising a distinct identification characteristic, said identification characteristic for being represented in the return RF signal traveling back from the tag to the RF transceiver and thereby identifying the tag and the medical utility item to which the tag is attached as apart from the balance of the items with tags;

(c) a microprocessor receiving the signal information from the at least one RF transceiver and maintaining a log of the locations of the tags and determining if and when a tag is not being RF tracked by the RF transceivers;

(d) at least one pointing mechanism for being controlled by the microprocessor, the at least one pointing mechanism comprising a light source and a movable support, the microprocessor controlling the at least one pointing mechanism to point to the at least one last known location of a tag that is no longer being RF tracked;

(e) at least one display device associated with the microprocessor for displaying the log of the locations of the tags and for alerting a user if and when a tag is no longer being RF tracked, the at least one display device further for displaying at least one last known location of a tag that is no longer being RF tracked;

(f) a video imaging device operable in conjunction with the microprocessor to provide an image of the surgical environment, the image of the surgical environment for display on the at least one display device and facilitating the display of the at least one last known location of a tag that is no longer being RF tracked; and

(g) at least one ultrasonic transducer positioned within the surgical environment and for transmitting ultrasonic waves to, and receiving ultrasonic waves back from, the ultrasonic responsive element of each tag within a localized space associated with the at least one last known location of a tag that is no longer being RF tracked.