Device for seeking an area of interest within a body

• US 5,188,111 A
• Filed: 01/18/1991
• Issued: 02/23/1993
• Est. Priority Date: 01/18/1991
• Status: Expired due to Term

• Current Assignee: Catheter Research Incorporated
• Original Assignee: Catheter Research Incorporated
• Inventors: Yates, David C., McCoy, William C.
• Primary Examiner(s): NASSER, ROBERT L
• Application Number:
  US07/642,882
• Time in Patent Office: 767 Days
• Field of Search: 128/4, 128/6, 128/656, 128/657, 128/772, 604/264, 604/280, 604/281, 604/95, 606/78
• US Class Current: 600/434
• CPC Class Codes: A61B 1/0058 using shape-memory elements
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/0084 for introduction into the body, e.g. by catheters A61B5/1459 takes precedence
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0033 electrically, e.g. heated by resistor
• CPC Class Codes: A61M 25/0105 Steering means as part of the catheter or advancing means; Markers for positioning systems for detection of markers A61B
• CPC Class Codes: G01R 33/285 Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
• CPC Class Codes: Y10S 128/07 Servo-systems

Abstract

An assembly is provided for seeking an area of interest within a body. The assembly includes an elongated directable member having a distal end for insertion into the body. The distal end includes a tip portion. The assembly also includes a deflector coupled to the directable member for deflecting the distal end of the directable member to direct the directable member within the body. The assembly further includes a sensor located in close proximity to the top portion of the directable member for sensing an area of interest within the body. The sensor generates an indicator signal upon detection of the area of interest. The assembly still further includes a control unit coupled to the deflector for controlling deflection of the distal end of the directable member by the deflector. The control unit generates a control signal to drive the deflector. The control unit stops deflection of the distal end of the directable member in response to the indicator signal generated by the sensor upon detection of the area of interest. The control unit holds the tip portion of the directable member in a stationary position directed toward the area of interest.

Claims

1. An assembly for seeking an area of interest within a body, the assembly comprising

an elongated directable member having a distal end for insertion into the body, the distal end including a tip portion,

deflecting means coupled to the directable member for deflecting the distal end of the directable member to direct the directable member within the body,

sensing means located in close proximity to the tip portion of the directable member for sensing an area of interest within the body, and generating an indicator signal upon detection of the area of interest, and

controlling means coupled to the deflecting means for controlling deflection of the distal end of the directable member by the deflecting means and generating a control signal to drive the deflecting means, the controlling means including means for stopping deflection of the distal end of the directable member by the deflecting means in response to the indicator signal generated by the sensing means upon detection of the area of interest.

2. The assembly of claim 1, wherein the controlling means holds the tip portion of the directable member in a stationary position directed toward the area of interest during detection of the area of interest by the sensing means.

3. The assembly of claim 1, wherein the deflecting means includes at least one temperature activated memory element coupled to the distal end of the directable member and means coupled to the at least one memory element for selectively heating the at least one memory element to deflect the distal end of the directable member, the heating means being coupled to the controlling means.

4. The assembly of claim 3, wherein the assembly includes two memory elements coupled to the distal end of the directable member and the controlling means includes first switch means for coupling the controlling means to the deflecting means to cause the deflecting means to deflect the distal end of the directable member in a first direction, and the controlling means also includes second switch means for coupling the controlling means to the deflecting means to cause the deflecting means to deflect the distal end of the directable member in a second direction different than plurality of memory element the first direction.

5. The assembly of claim 3, wherein the assembly includes a plurality of memory elements coupled to the distal end of the directable member for deflecting the distal end of the directable member in a plurality of different directions.

6. The assembly of claim 1, wherein the controlling means generates a control signal for deflecting the distal end of the directable member, the assembly further comprising means for mapping the location of the area of interest inside the body, and means for coupling the controlling means to the mapping means.

7. The assembly of claim 6, wherein the mapping means includes means for storing the output of the sensor and the control signal output of the controlling means.

8. The assembly of claim 1, further comprising treating means located near the tip portion of the directable member for treating the area of interest.

9. The assembly of claim 8, further comprising a treatment source coupled to the treating means for delivering a treatment to the area of interest through the treating means when the tip portion of the directable member is directed toward the area of interest.

10. The assembly of claim 1, further comprising an indicator for providing an indication that the area of interest has been detected by the sensing means, and means for coupling the indicator to the sensing means.

11. The assembly of claim 1, further comprising imaging means located near the tip portion of the directable member for providing an image signal representing the area of interest.

12. The assembly of claim 11, further comprising means for storing the image signal provided by the imaging means upon detection of the area of interest by the sensing means, and means for coupling the imaging means to the means for storing the image signal.

13. An assembly for seeking an area of interest within a body, the assembly comprising

an elongated directable member including a distal end for insertion into the body and at least one temperature activated memory element coupled to the distal end, the memory element moving to assume a predetermined shape when heated to a predetermined temperature,

heating means for heating the at least one memory element to deflect the distal end of the directable member to direct the directable member within the body,

means for coupling the heating means to the at least one temperature activated memory element,

a sensor located in close proximity to the distal end of the directable member for detecting an area of interest within the body,

controlling means coupled to the heating means for controlling deflection of the distal end of the directable member by the heating means and generating a first control signal to cause the heating means to deflect the distal end of the directable member, and the controlling means including means for generating a second control signal to cause the heating means to hold the distal end of the directable member in a stationary position directed toward the area of interest upon detection of the area of interest by the sensor, and

means for coupling the sensor to the controlling means.

14. The assembly of claim 13, wherein the assembly includes two memory elements coupled to the distal end of the directable member, the controlling means includes first switch means for coupling the controlling means to the heating means to cause the heating means to deflect the distal end of the directable member in a first direction, and the controlling means includes second switch means for coupling the controlling means to the heating means to cause the heating means to deflect the distal end of the directable member in a second direction different than the first direction.

15. The assembly of claim 13, further comprising means for mapping the location of the area of interest inside the body.

16. The assembly of claim 15, wherein the mapping means includes means for storing the output of the sensor and the output of the controlling means.

17. The assembly of claim 13, wherein the sensor generates a signal and the controlling means includes means for comparing the signal from the sensor to a reference signal indicative of a selected area of interest, the controlling means generating the first control signal when the signal from the sensor and the reference signal are not substantially equivalent and the controlling means generating the second control signal when the signal and the reference signal are substantially equivalent.

18. The assembly of claim 13, further comprising treating means coupled to the directable member in close proximity to the distal end of the directable member for treating the area of interest.

19. The assembly of claim 18, further comprising a treatment source coupled to the treating means for delivering a treatment to the area of interest through the treating means when the tip portion of the directable member is directed toward the area of interest.

20. The assembly of claim 13, further comprising an indicator for providing an indication that the area of interest has been detected by the sensing means, and means for coupling the indicator to the sensing means.