Multi-acoustic-beam ultrasound ablation catheter system

Abstract

The invention relates to the field of interventional therapy, and discloses a multi-acoustic-beam ultrasound ablation catheter system. The multi-acoustic-beam ultrasound ablation catheter system comprises an ablation catheter, an operating handle and an ablation generating device, wherein from near end to far end, the ablation catheter comprises a catheter section and an ablation section which are sequentially connected; the ablation generating device comprises a signal processing unit and a treatment unit; the ablation section comprises an ultrasonic transducer component, a first connecting catheter, an ultrasonic imaging probe and a second connecting catheter; the ultrasonic transducer component comprises a transducer pedestal and a transducer vibrator which is clamped by the transducer pedestal; the transducer vibrator comprises three electrode layers and two layers of piezoelectric plates which are superposed in an alternate mode; a positive electrode is connected to the electrode layer between the two layers of the piezoelectric plates, and the positive electrode is connected to a positive electrode of the treatment unit; a negative electrode is connected to each of the electrode layers on two sides of the two layers of the piezoelectric plate; and the negative electrodes are connected to a negative electrode of the treatment unit. By virtue of the ablation catheter system disclosed by the invention, the working efficiency of the ultrasonic transducer is improved, the generation of heat energy is reduced and the safety of ultrasound ablation therapy is enhanced.

Description

technical field [0001] The invention relates to the field of interventional therapy, in particular to a multi-beam ultrasonic ablation catheter system. Background technique [0002] Ultrasonic energy has good directionality and penetration. Compared with therapeutic energy, ultrasonic ablation uses lower energy, and energy transmission does not depend on tissue conduction, which can avoid damage to vascular intima tissue during treatment. , ultrasound energy may be an ideal energy source in the field of clinical ablation therapy. [0003] At present, the basic structure of an ultrasonic transducer includes a piezoelectric sheet, an electrode, a backing and a matching layer. The ultrasonic transducer controls the frequency and impulse response of the ultrasonic transducer through the backing, and at the same time controls the unidirectionality of the energy propagation of the ultrasonic transducer. Since the backing of the ultrasonic transducer is mostly made of high damping...

AI Technical Summary

Problems solved by technology

U.S. Patent Publication No. US2013123670A1 discloses a single-chip two-way emission method to increase the direction of ultrasonic emission, but there are disadvantages such as narrow bandwidth of the transducer, low energy, and increased heat generation when the driving voltage is increased, which endangers safety.

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