Thrombus resolving treatment apparatus

• US 5,307,816 A
• Filed: 08/21/1992
• Issued: 05/03/1994
• Est. Priority Date: 08/21/1991
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Fujimoto, Katsuhiko, Hashimoto, Shinichi, Aida, Satoshi, Saitoh, Shiroh
• Primary Examiner(s): JAWORSKI, FRANCIS J
• Application Number:
  US07/932,952
• Time in Patent Office: 620 Days
• Field of Search: 128/660.03, 128/660.07, 128/662.05, 128/662.06
• US Class Current: 600/439
• CPC Class Codes: A61B 17/2256 with means for locating or checking the concrement, e.g. X-ray apparatus, imaging means A61B17/2255 takes precedence
• CPC Class Codes: A61B 17/2258 integrated in a central portion of the shock wave apparatus
• CPC Class Codes: A61B 2017/00106 ultrasonic
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61B 8/0833 involving detecting or locating foreign bodies or organic structures
• 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: A61B 8/445 Details of catheter construction
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

A thrombus resolving treatment apparatus of this invention has an ultrasonic radiator for radiating a therapeutic ultrasonic wave to a thrombus portion, an ultrasonic probe for obtaining B mode image data of an interior of a patient'"'"'s body, a first ultrasonic imaging unit for visually displaying the B mode image data supplied from the ultrasonic probe, a catheter inserted in the blood vessel, an ultrasonic transducer, provided to the catheter, for obtaining cross-sectional image data of an interior of a blood vessel, and a second ultrasonic imaging unit for visually displaying the cross-sectional image data supplied from the ultrasonic transducer.

Claims

1. A thrombus resolving treatment apparatus for resolving a thrombus by radiating a therapeutic ultrasonic wave on a thrombus portion located in a blood vessel of a patient'"'"'s body in which a thrombus resolvent is injected, comprising:

an ultrasonic radiator for radiating a therapeutic ultrasonic wave on said thrombus portion;

an ultrasonic probe for obtaining tomographic image data of an interior of said patient'"'"'s body;

a first ultrasonic imaging unit for visually displaying the tomographic image data supplied from said ultrasonic probe;

a catheter which is inserted into said blood vessel;

an ultrasonic transducer, mounted on said catheter, for obtaining tomographic image data of an interior of said blood vessel; and

a second ultrasonic imaging unit for visually displaying the tomographic image data supplied from said ultrasonic transducer;

said apparatus further comprising;

calculation means for calculating a value representing an effect of a thrombus resolving treatment on the basis of the tomographic image data supplied from said ultrasonic transducer;

identification means for identifying whether or not said value has reached a predetermined value; and

means for stopping radiation of the therapeutic ultrasonic wave by said ultrasonic radiator when the value calculated by said calculation means has reached said predetermined value.

2. The apparatus according to claim 1, wherein said calculation means is connected to said identification means, and said apparatus further comprises injection control means, connected to said identification means, for controlling the injection of the thrombus resolvent into said blood vessel on the basis of a predetermined signal generated by said identification means.

3. The apparatus according to claim 1, wherein said ultrasonic radiator comprises spherically arranged piezoelectric elements, an acoustic matching layer being applied on a front surface of said ultrasonic radiator, a water bag having a bellows being mounted on said acoustic matching layer, and a film to be brought into contact with a body surface of the patient being mounted on a distal end of said water bag.

4. The apparatus according to claim 1, wherein said ultrasonic probe is detachably fixed to said ultrasonic radiator by a tubular probe holding member, and mounted on said ultrasonic radiator when a packing for maintaining watertightness of said water bag and for fixing said ultrasonic radiator and said ultrasonic probe at predetermined positions is fitted in a groove formed at a predetermined position of said ultrasonic probe along a circumferential direction by spring means provided on an inner circumferential surface of said holding member and ring means biased toward a center of said holding member.

5. The apparatus according to claim 3, wherein said ultrasonic radiator is constituted by an annular array type piezoelectric vibrator in which a plurality of annular vibrators are concentrically located, and each of said vibrators electronically changes a focal point at different phases.

6. The apparatus according to claim 3, wherein said ultrasonic radiator is a two-dimensional array type piezoelectric vibrator.

7. The apparatus according to claim 1, wherein said ultrasonic probe is stationarily disposed at a central or peripheral portion of said ultrasonic radiator.

8. A thrombus resolving treatment apparatus for resolving a thrombus by radiating a therapeutic ultrasonic wave on a thrombus portion located in a blood vessel of a patient'"'"'s body in which a thrombus resolvent is injected, comprising:

an ultrasonic radiator for radiating a therapeutic wave on said thrombus portion;

an ultrasonic probe for obtaining tomographic image data of an interior of said patient'"'"'s body;

a first ultrasonic imaging unit, connected to said ultrasonic probe, for visually displaying the tomographic image data supplied from said ultrasonic probe;

a catheter which is inserted into said blood vessel;

an ultrasonic transducer, mounted on said catheter, for obtaining tomographic image data of an interior of said blood vessel; and

a second ultrasonic imaging unit, connected to said ultrasonic transducer, for visually displaying the tomographic image data supplied from said ultrasonic transducer;

wherein said ultrasonic radiator is mounted on said catheter.

9. A thrombus resolving treatment apparatus for resolving a thrombus by radiating a therapeutic ultrasonic wave on a thrombus portion located in a blood vessel of a patient'"'"'s body in which a thrombus resolvent is injected, comprising:

an ultrasonic radiator for radiating a therapeutic ultrasonic wave on said thrombus portion;

an ultrasonic probe for obtaining tomographic image data of an interior of said patient'"'"'s body by transmitting and receiving an ultrasonic wave having a predetermined frequency;

a first ultrasonic imaging unit, connected to said ultrasonic probe, for visually displaying the tomographic image data supplied from aid ultrasonic probe;

a catheter which is inserted into said blood vessel;

an ultrasonic transducer, mounted on said catheter, for obtaining tomographic image data of an interior of said blood vessel by transmitting and receiving an ultrasonic wave having a frequency different from that of the ultrasonic wave transmitted and received by said ultrasonic probe, and for detecting the ultrasonic wave transmitted from the ultrasonic probe, wherein said ultrasonic transducer comprises at least one strip-shaped piezoelectric element provided along a longitudinal direction of said catheter and having the dimensions of thickness, length in a circumferential direction of said catheter, and length in an axial direction of said catheter, any two of said dimensions being selected so as to correspond to a frequency of the ultrasonic wave transmitted from and received by said ultrasonic transducer and to a frequency of the ultrasonic wave transmitted from and received by said ultrasonic probe, respectively, and

wherein the remaining dimension of said piezoelectric element is selected so as to correspond to a frequency of the ultrasonic wave radiated by said ultrasonic radiator;

a second ultrasonic imaging unit, connected to said ultrasonic transducer, for visually displaying the tomographic image data supplied from said ultrasonic transducer;

position detection means, connected to said ultrasonic transducer, for processing an ultrasonic wave signal output from said ultrasonic probe upon receipt from said ultrasonic transducer, thereby detecting a position within said blood vessel of said catheter; and

means for displaying a detected result of said position detection means on a display screen of said first ultrasonic imaging unit.