Invasive medical device with position sensing and display

• US 20030004411A1
• Filed: 06/17/2002
• Published: 01/02/2003
• Est. Priority Date: 03/11/1999
• Status: Active Grant

• Current Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Original Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Inventors: Govari, Assaf, Schwartz, Yitzhack
• Granted Patent: US 7,590,441 B2
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 10/0041 Detection of breast cancer mammography by transillumination A61B5/0091, by X-rays A61B6/502, by ultrasonic means A61B8/0825
• CPC Class Codes: A61B 10/0233 Pointed or sharp biopsy instruments
• CPC Class Codes: A61B 17/1114 of the digestive tract, e.g. bowels or oesophagus
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 2010/045 Needles pointed biopsy devices with vacuum aspiration A61B10/0283
• CPC Class Codes: A61B 2017/008 Removal of tumors
• CPC Class Codes: A61B 2017/3413 guided by ultrasound
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/2063 Acoustic tracking systems, e.g. using ultrasound
• CPC Class Codes: A61B 2034/2072 Reference field transducer attached to an instrument or patient
• CPC Class Codes: A61B 2090/3908 Soft tissue, e.g. breast tissue
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61B 2090/3929 Active markers
• CPC Class Codes: A61B 2090/3954 magnetic, e.g. NMR or MRI
• CPC Class Codes: A61B 2090/3958 emitting a signal
• CPC Class Codes: A61B 2090/397 electromagnetic other than visible, e.g. microwave
• 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 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 5/061 : Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body A61B1/00158 takes precedence
• CPC Class Codes: A61B 5/062 : using magnetic field
• CPC Class Codes: A61B 90/36 : Image-producing devices or illumination devices not otherwise provided for
• CPC Class Codes: A61B 90/39 : Markers, e.g. radio-opaque or breast lesions markers

Abstract

Apparatus for performing a medical procedure on a tissue within a body of a subject includes a wireless tag configured to be fixed to the tissue and adapted to emit radiation, thereby causing first signals to be generated indicative of a location of the tag in the body. An invasive medical tool includes a probe, which is adapted to penetrate into the body so as to reach the tissue. A handle is fixed proximally to the probe, for manipulation by an operator of the tool. A display, mounted on the handle, presents a visual indication to the operator of an orientation of the probe relative to the tag. A processing unit processes the first signals so as to determine coordinates of the tag relative to the probe, and drives the display responsive to the coordinates.

Claims

1. Apparatus for performing a medical procedure on a tissue within a body of a subject, comprising:

a wireless tag configured to be fixed to the tissue and adapted to emit radiation, thereby causing first signals to be generated indicative of a location of the tag in the body;

an invasive medical tool, comprising;

a probe, which is adapted to penetrate into the body so as to reach the tissue;

a handle, fixed proximally to the probe, and adapted to be manipulated by an operator of the tool; and

a display, mounted on the handle, and adapted to present a visual indication to the operator of an orientation of the probe relative to the tag; and

a processing unit, coupled to process the first signals so as to determine coordinates of the tag relative to the probe, and to drive the display responsive to the coordinates.

2. Apparatus according to claim 1, wherein the invasive medical tool further comprises a receiver, which is adapted to receive the radiation emitted by the wireless tag, and to generate the first signals responsive thereto for processing by the processing unit.

3. Apparatus according to claim 2, wherein the radiation emitted by the tag comprises radio-frequency (RF) electromagnetic radiation.

4. Apparatus according to claim 1, wherein the invasive medical tool further comprises a tool position sensor, which is adapted to generate second signals indicative of the coordinates of the probe, and wherein the processing unit is coupled to process the second signals together with the first signals so as to determine the coordinates of the tag relative to the probe.

5. Apparatus according to claim 4, and comprising one or more field generators, which are fixed in the external frame of reference and which are adapted to generate electromagnetic fields in a vicinity of the tissue, and wherein the wireless tag and the tool position sensor comprise field sensors, in which electrical currents flow responsive to the electromagnetic fields, and wherein the first and second signals are indicative of the electrical currents flowing in the field sensors.

6. Apparatus according to claim 1, wherein the radiation emitted by the tag comprises radio-frequency (RF) electromagnetic radiation.

7. Apparatus according to claim 6, and comprising one or more acoustic transmitters, which are adapted to transmit acoustic energy into the body in a vicinity of the tissue, and wherein the tag is adapted to receive and use the acoustic energy in generating the electromagnetic radiation.

8. Apparatus according to claim 1, wherein the radiation emitted by the tag comprises acoustic radiation.

9. Apparatus according to claim 1, wherein the display is adapted to present a further visual indication of a distance from the probe to the tag.

10. Apparatus according to claim 1, wherein the invasive medical tool is adapted to perform a surgical procedure on the tissue.

11. Apparatus according to claim 1, wherein the invasive tool comprises an endoscope.

13. A method according to claim 12, wherein processing the first signals comprises receiving the radiation emitted by the wireless tag using a receiver in the medical tool, and generating the first signals responsive to the received radiation.

14. A method according to claim 13, wherein receiving the radiation emitted by the tag comprises receiving radio-frequency (RF) electromagnetic radiation.

15. A method according to claim 12, and comprising receiving second signals generated by a tool position sensor coupled to the invasive medical tool, indicative of the coordinates of the tool, and wherein processing the first signals comprises processing the second signals together with the first signals so as to determine the coordinates of the tag relative to the probe.

16. A method according to claim 15, wherein actuating the tag comprises generating electromagnetic fields in a vicinity of the tissue, and wherein the wireless tag and the tool position sensor comprise field sensors, in which electrical currents flow responsive to the electromagnetic fields, and wherein the first and second signals are indicative of the electrical currents flowing in the field sensors.

17. A method according to claim 12, wherein actuating the tag comprises actuating the tag to emit radio-frequency (RF) electromagnetic radiation.

18. A method according to claim 17, wherein actuating the tag to emit RF electromagnetic radiation comprises transmitting acoustic energy into the body in a vicinity of the tissue, wherein the tag receives and uses the acoustic energy in generating the electromagnetic radiation.

19. A method according to claim 12, wherein actuating the tag comprises actuating the tag to emit acoustic radiation.

20. A method according to claim 12, and comprising displaying a further visual indication of a distance from the probe to the tag.

21. A method according to claim 12, wherein advancing the tool into the body comprises performing a surgical procedure on the tissue.

22. A method according to claim 12, wherein advancing the tool into the body comprises performing an endoscopic procedure on the tissue.

12. A method for performing a medical procedure on a tissue within a body of a subject, comprising:

fixing a wireless tag to the tissue;

actuating the tag to emit radiation, thereby causing first signals to be generated indicative of a location of the tag in the body;

introducing an invasive medical tool into the body by manipulating a handle of the tool;

processing the first signals so as to determine coordinates of the tag relative to the tool;

responsive to the coordinates, displaying a visual indication on the handle of the tool of an orientation of the tool relative to the tag; and

advancing the tool into the body to the tissue by manipulating the handle while observing the visual indication so that the tool reaches the tissue.