CN210542927U

CN210542927U - Catheter assembly and ultrasonic ablation equipment

Info

Publication number: CN210542927U
Application number: CN201920515889.5U
Authority: CN
Inventors: 付兵; 王智彪; 胡红兵; 齐忠; 王�琦
Original assignee: Chongqing Haifu Medical Technology Co ltd
Current assignee: Chongqing Haifu Medical Technology Co ltd
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-05-19
Anticipated expiration: 2029-04-16

Abstract

The utility model provides a catheter assembly, catheter assembly includes catheter, adjusting part and at least one ultrasonic transducer group, every ultrasonic transducer group all includes two ultrasonic transducer, and two ultrasonic transducer in same ultrasonic transducer group follow the axis direction interval ground of catheter sets up the periphery of catheter, adjusting part can adjust ultrasonic transducer's surface with angle between the axis direction of catheter. The utility model discloses an ultrasonic transducer can be under adjusting part's regulating action, by human inside to the secret focus ultrasonic wave in affected part, guaranteed ultrasonic wave focusing's precision to because the distance between catheter subassembly and the affected part is more nearly, thereby can utilize still less energy to reach treatment, avoid the high temperature of this subassembly production to patient's injury under the high power state simultaneously.

Description

Catheter assembly and ultrasonic ablation equipment

Technical Field

The utility model relates to the field of medical equipment, specifically, relate to a catheter assembly to and an ultrasonic ablation equipment including this catheter assembly.

Background

Ultrasonic ablation refers to the process of collecting the energy of ultrasonic waves to a sufficient intensity by utilizing the characteristic that the ultrasonic waves can pass through human tissues and are focused in a specific area, so that the collected focal area reaches an instant high temperature to destroy a pathological change tissue, and the pathological change tissue shows coagulative necrosis (namely ablation) on the histopathology, thereby achieving the purpose of destroying the pathological change tissue on the premise of not damaging normal tissues. The technology and related products have been proved on the treatment of diseases such as hysteromyoma after years of practice, and revolutionary changes are generated in the traditional surgery.

However, due to the complexity of the human body, some lesions are limited in their location, tissue structure and incident angle of the external ultrasound, resulting in poor focusing conditions and limited therapeutic effects. And the emission energy of external ultrasound is increased, so that danger is easily caused, and the requirements on instruments are extremely high. For example, the tumor of prostate cancer is mostly located in the peripheral zone of prostate gland, and is closer to the intestinal tract, the focus is limited to be close during treatment, the focus position of ultrasonic waves is difficult to control accurately, and the treatment requirement cannot be met.

Therefore, how to provide an ultrasonic ablation device capable of accurately destroying diseased tissues becomes a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a catheter assembly and an ultrasonic ablation equipment including this catheter assembly, this catheter assembly can the accurate control transducer send the ultrasonic wave the state of assembling.

In order to solve the technical problem, as an aspect of the utility model provides a catheter assembly, catheter assembly includes the catheter, wherein, catheter assembly still includes adjusting part and at least one ultrasonic transducer group, every ultrasonic transducer group all includes two ultrasonic transducer, and two ultrasonic transducer in the same ultrasonic transducer group follow the axis direction interval of catheter sets up the periphery of catheter, adjusting part is used for adjusting ultrasonic transducer's surface with angle between the axis direction of catheter to the ultrasonic wave that makes two ultrasonic transducer in each ultrasonic transducer group send assembles or focuses on.

Preferably, the ultrasonic transducers are provided with through holes, and the catheter passes through the through hole of each ultrasonic transducer.

Preferably, ultrasonic transducer includes a plurality of transduction wafers, the transduction wafer encircles the surface setting of catheter, and in same ultrasonic transducer, there is the interval between two adjacent transduction wafers, it can adjust to adjust the subassembly the transduction wafer deviates from the surface of catheter with the angle between the axis direction of catheter.

Preferably, the ultrasound transducer group further comprises a backing tube, a portion of the urinary catheter is disposed within a lumen of the backing tube, and the transducer wafer is disposed on an outer surface of the backing tube.

Preferably, the backing tube includes a first end portion, an intermediate portion and a second end portion arranged in sequence along an axial direction of the backing tube, the first end portion has a first slot formed thereon, the first slot having an end opening located on an end surface of the first end portion, the first slot penetrating the backing tube in a thickness direction, the second end portion has a second slot formed thereon, the second slot having an end opening located on an end surface of the second end portion, and the second slot penetrating the backing tube in the thickness direction;

one of the two ultrasonic transducers is arranged at the first end part in a surrounding manner, the transducer wafer is arranged on the part of the first end part between the two adjacent first grooves, and the adjusting assembly is used for adjusting the angle between the part of the first end part between the two adjacent first grooves and the axial direction of the catheter;

the other of the two ultrasonic transducers is arranged around the second end part, the transducer wafer is arranged on the part between the two adjacent second grooves, and the adjusting assembly is used for adjusting the angle between the part of the second end part between the two adjacent second grooves and the axial direction of the catheter.

Preferably, said adjustment assembly comprises a plurality of volume adjustable adjustment bladders, at least one of said adjustment bladders being disposed between said first end portion and said urinary catheter, and at least one of said adjustment bladders being disposed between said second end portion and said urinary catheter.

Preferably, a fluid channel is formed on the tube wall of the urinary catheter, the fluid channel is communicated with the adjusting bag, and the fluid channel comprises a fluid inlet and a fluid outlet.

Preferably, the adjustment capsule is formed integrally with the catheter.

Preferably, the ultrasonic transducer set further comprises an energy ring disposed around the intermediate portion.

Preferably, the inner diameter of the energy ring is adjustable to vary the size of the intermediate portion.

Preferably, the catheter assembly further comprises an acoustic membrane, a closed ultrasonic cavity is formed between the acoustic membrane and the catheter, and the ultrasonic transducer group is arranged in the ultrasonic cavity.

Preferably, a cooling liquid inflow channel and a cooling liquid outflow channel are formed on the tube wall of the catheter, and the cooling liquid inflow channel and the cooling liquid outflow channel are communicated with the ultrasonic cavity.

Preferably, the catheter assembly further comprises a temperature sensing element disposed within the ultrasound lumen.

Preferably, the catheter assembly further comprises a positioning balloon, the positioning balloon is arranged on the catheter, and the positioning balloon is located between the insertion end of the catheter and the ultrasonic transducer group.

As a second aspect of the present invention, there is provided an ultrasonic ablation apparatus, comprising an external transducer and a catheter assembly, wherein the catheter assembly is the foregoing catheter assembly, and the external transducer is used for emitting external ultrasonic waves to the position of the ultrasonic focus of the catheter assembly.

Preferably, the ultrasonic ablation device further comprises a control module for controlling the group of ultrasonic transducers in the catheter assembly and the external transducer to be activated in a predetermined sequence.

The utility model discloses an ultrasonic transducer can be under adjusting part's regulating action, by human inside to the secret affected part focus ultrasonic wave to guarantee the precision of ultrasonic wave focus, avoided the damage of external ultrasonic wave to the normal tissue of human body. And, because the utility model discloses a catheter subassembly can be focused at human inside, and the distance between catheter subassembly and the affected part is more nearly to can utilize still less energy to reach treatment, still avoid the injury of the high temperature that the subassembly produced under high power state to normal tissues such as patient urethra when the energy saving.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a catheter assembly provided by the present invention;

FIG. 2 is a schematic diagram of one embodiment of the ultrasonic transducer array of FIG. 1;

FIG. 3 is a schematic view of the ultrasonic transducer set of FIG. 2 in an operative state;

FIG. 4 is a schematic diagram of the operating principle of the ultrasonic transducer assembly of FIG. 2;

fig. 5 is a schematic view of the working principle of the ultrasonic ablation apparatus provided by the present invention.

Description of the reference numerals

10: catheter assembly 100: catheter

200: the adjusting assembly 210: adjusting bag

300: the ultrasonic transducer group 310: ultrasonic transducer

311: the transducer wafer 320: back lining pipe

321: first end portion 322: intermediate section

323: second end 400: energy ring

500: the sound-transmitting membrane 510: coolant inflow channel

511: coolant inlet 520: coolant outflow passage

521: coolant outlet 530: temperature detecting element

600: positioning balloon

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The existing ultrasonic ablation equipment is difficult to accurately control the focusing position of ultrasonic waves and cannot effectively ablate pathological change tissues of hidden parts such as prostate.

In order to solve the above technical problem, as shown in fig. 1, as an aspect of the present invention, a urinary catheter assembly 10 is provided, the urinary catheter assembly 10 includes a urinary catheter 100, the urinary catheter assembly 10 further includes an adjusting assembly 200 and at least one ultrasonic transducer group 300, each ultrasonic transducer group 300 includes two ultrasonic transducers 310, the two ultrasonic transducers 310 in the same ultrasonic transducer group 300 are disposed at the periphery of the urinary catheter 100 at intervals along the axial direction of the urinary catheter 100, the adjusting assembly 200 is used for adjusting the angle between the outer surface of the ultrasonic transducer 310 and the axial direction of the urinary catheter 100, so that the ultrasonic waves emitted by the two ultrasonic transducers 310 in each ultrasonic transducer group 300 converge or focus.

It should be noted that "focusing" herein means that the ultrasonic energy emitted by different ultrasonic transducers is superimposed in a relatively large spatial range. "focusing" herein means focusing ultrasonic energy emitted from different ultrasonic transducers to a certain point. Of course, the "point" herein is not a strict one-dimensional concept, and is based on a region that can be realized in real operation. The focal positions of the two ultrasound transducers 310 in different ultrasound transducer groups 300 may be different.

The utility model discloses an ultrasonic transducer can be under adjusting part's regulating action, by human inside to the secret focus ultrasonic wave in affected part, guaranteed ultrasonic wave focusing's precision to because the distance between catheter subassembly and the affected part is more nearly, thereby can utilize still less energy to reach treatment, avoid the high temperature of this subassembly production to patient's injury under the high power state simultaneously.

Preferably, the adjustment assembly 200 is capable of focusing the ultrasonic waves emitted by two ultrasonic transducers 310 in the group of ultrasonic transducers. The utility model discloses the position that the orbit intercrossing that the ultrasonic wave that two ultrasonic transducer 310 sent was marchd is the position that assembles of ultrasonic wave promptly, adjusts the angle that two ultrasonic transducer 310 can be adjusted respectively to adjust the state of the ultrasonic wave that two ultrasonic transducer 310 sent, further can adjust the focus position of the ultrasonic wave that two ultrasonic transducer 310 sent.

The utility model discloses set up two at least ultrasonic transducer 310 on catheter 100, when catheter 100 got into the human urethra, bladder, intestinal, duct, trachea, esophagus etc. secret position, ultrasonic transducer 310 can be under the regulatory action of adjusting part 200, by human inside to secret affected part focus ultrasonic wave to guarantee the precision of ultrasonic wave focus, avoided the damage of external ultrasonic wave to the normal tissue of human body. And, because the utility model discloses a catheter subassembly 10 can be focused at human inside, and the distance between catheter subassembly 10 and the affected part is nearer to can utilize still less energy to reach treatment, still avoid the injury of the high temperature that the subassembly produced under high power state to normal tissues such as patient urethra when the energy saving.

The structure and the arrangement position of the adjusting assembly 200 are not particularly limited, for example, the adjusting assembly 200 may be a mechanical device with an angle adjusting function, including a motor, an actuator and a power supply line arranged in the wall of the urinary catheter 100; alternatively, adjustment assembly 200 may be an electrostrictive device comprising electrostrictive material disposed between ultrasound transducer 310 and catheter 100 and electrode plates disposed on either side of the electrostrictive material and electrical supply wires disposed in the wall of catheter 100.

To facilitate focusing of the ultrasound waves emitted by the ultrasound transducers 310 of the catheter assembly 10, the ultrasound transducers 310 preferably have through holes, as shown in FIG. 1, through which the catheter 100 passes through each of the ultrasound transducers 310.

The utility model discloses set up ultrasonic transducer 310 into the structure that encircles catheter 100 to guarantee the stability of ultrasonic transducer 310 position on catheter 100 when the focus, and when ultrasonic transducer 310's orientation is wrong, can conveniently make annular ultrasonic transducer 310 towards the affected part through the angle of twisting catheter 100. Moreover, the ultrasonic transducer 310 with the through hole can be fixed on the catheter 100 only through the through hole, so that the space occupied by the fixing component is saved, the whole volume of the catheter component 10 is reduced, and the comfort level of a patient is improved.

The structure of ultrasonic transducer 310 is not particularly limited, for example, to facilitate adjustment of the angle of ultrasonic transducer 310, ultrasonic transducer 310 may have a plurality of through holes extending through ultrasonic transducer 310 in the thickness direction, or ultrasonic transducer 310 may include a plurality of transducer wafers surrounding catheter 100.

To further facilitate focusing of the ultrasound waves generated by the catheter assembly 10, preferably, as shown in fig. 2-4, the ultrasonic transducer 310 comprises a plurality of transducer wafers 311, the transducer wafers 311 are disposed around the outer surface of the catheter 100, and in the same ultrasonic transducer 310, a gap is formed between two adjacent transducer wafers 311, and the adjusting assembly 200 can adjust the angle between the surface of the transducer wafer 311 facing away from the catheter 100 and the axial direction of the catheter 100.

The utility model discloses an ultrasonic transducer 310 includes a plurality of transduction wafers 311 that encircle catheter 100 surface and set up to only need start the transduction wafer 311 towards the affected part to make the ultrasonic wave focus to the affected part after catheter assembly 10 inserts patient's coelom, arouse the patient pain when having avoided rotating catheter 100. Furthermore, the ultrasonic transducer 310 is divided into a plurality of transducer wafers 311, so that only the transducer wafer 311 which normally works can be turned on, and the transducer wafers 311 in the other directions can be turned off, so as to avoid the damage of redundant ultrasonic waves to normal tissues. Furthermore, the utility model discloses a transduction wafer 311 sets up towards a plurality of directions to can treat different regions respectively at the same time control many pairs of transduction wafer 311, thereby improved treatment effeciency.

Preferably, as shown in fig. 2-4, the ultrasound transducer assembly 300 further comprises a backing tube 320, a portion of the urinary catheter 100 being disposed within the lumen of the backing tube 320, and the transducer wafer 311 being disposed on the outer surface of the backing tube 320.

The utility model discloses set up transduction wafer 311 on backing tube 320 to can utilize backing tube 320 to absorb the heat that transduction wafer 311 produced, avoid high temperature to the normal tissue of patient, catheter 100 and can the injury of wafer 311 self. Furthermore, the transducer wafers 311 are disposed on the backing tube 320, so that the backing tube 320 can ensure the relative positions of the transducer wafers 311, and prevent the focusing accuracy of the two transducer wafers 311 from being affected when the catheter 100 is stretched or bent.

To facilitate deformation and to facilitate angular adjustment of the transducer wafer 311, the material of the backing tube 320 preferably comprises a resilient metallic material.

Preferably, as shown in fig. 2 to 4, the backing tube 320 includes a first end portion 321, an intermediate portion 322, and a second end portion 323 arranged in sequence along the axial direction of the backing tube 320, the first end portion 321 is formed with a first slot extending along the axial direction of the backing tube 320, an end opening of the first slot is located on an end face of the first end portion 321, and the first slot penetrates the backing tube 320 in the thickness direction, the second end portion 323 is formed with a second slot extending along the axial direction of the backing tube 320, an end opening of the second slot is located on an end face of the second end portion 323, and the second slot penetrates the backing tube 320 in the thickness direction;

one of the two ultrasonic transducers 310 is circumferentially arranged at the first end portion 321, the transducer wafer 311 is arranged on the part between two adjacent first slots, and the adjusting assembly 200 is used for adjusting the angle between the part of the first end portion 321 between two adjacent first slots and the axial direction of the catheter 100;

the other of the two ultrasonic transducers 310 is arranged around the second end portion 323, the transducer wafer 311 is arranged on the part between two adjacent second slots, and the adjusting assembly 200 is used for adjusting the angle between the part of the second end portion 323 between two adjacent second slots and the axial direction of the catheter 100.

It is easily understood that, as shown in fig. 3, when the adjustment assembly 200 is operated, the angle between the two transducer wafers 311 of the two different ultrasonic transducers 310 can be adjusted by lifting the portion between the two slots (the two first slots or the two second slots) of the corresponding end (the first end 321 or the second end 323) of the transducer wafer 311 to the outside of the urinary catheter 100. As shown in fig. 4, when the ultrasonic waves emitted from the two transducer wafers 311 both pass through the affected part a, the ultrasonic wave focusing on the affected part a can be completed, and the two ultrasonic waves can also be subjected to energy or phase superposition (i.e. unfocusing) on the affected part a.

The utility model discloses a back lining pipe 320 through intermediate part 322 accomplished with catheter 100 between fixed, make the angle between transducer wafer 311 and catheter 100 can be by the angle that the part lifted up between two flutings of corresponding tip control the ultrasonic wave focus or the position of assembling accurately through tip and the grooved setting of tip.

To reduce the weight and volume of the assembly, it is preferred that the adjustment assembly 200 comprises a plurality of volume adjustable adjustment bladders 210, as shown in fig. 1-4, with at least one adjustment bladder 210 being disposed between the first end 321 and the urinary catheter 100 and at least one adjustment bladder 210 being disposed between the second end 323 and the urinary catheter 100.

The utility model discloses a part that the regulation bag 210 that sets up between back lining pipe 320 and catheter 100 outer wall will correspond the tip between two flutings is lifted up or falls, only need fill gas or liquid to regulation bag 210 and can accomplish regulatory function, mechanical structure has been avoided adopting, the too big problem of subassembly total weight when electromagnetic structure, it does not occupy unnecessary volume to adjust bag 210 simultaneously under non-operating condition, the subassembly total volume has been reduced, the compactness of subassembly structure has been improved, the misery that produces when having alleviateed subassembly business turn over patient's coelom.

To simplify the assembly structure, it is preferred that the catheter 100 has a fluid channel formed in the wall thereof, said fluid channel communicating with the regulating sac 210, said fluid channel comprising a fluid inlet and a fluid outlet.

It will be readily appreciated that the other end of the fluid channel is connected to the outside of the patient's body, and to the apparatus for controlling the amount of liquid or gas flowing in and out. The utility model discloses general fluid passage sets up on the pipe wall of catheter 100, needn't use extra pipeline to adjust bag 210 air feed, water supply, has simplified the subassembly structure.

Preferably, the adjustment bladders 210 are in one-to-one correspondence with the transducer wafers 311, and the walls of the catheter 100 have a plurality of fluid channels 220 formed therein that are in one-to-one correspondence with the adjustment bladders 210.

The utility model discloses set up many fluid passage 220 and control different regulation bags 210 respectively to can only lift up the ultrasonic transduction wafer 311 that needs release at the during operation, the too big painful unnecessary that causes the patient of subassembly volume change when having avoided all transduction wafers 311 to all lifted.

To simplify the assembly structure, the conditioning bladder 210 is preferably formed integrally with the urinary catheter 100.

To enhance the therapeutic effect, the ultrasound transducer assembly 300 preferably further includes an energy ring 400, as shown in fig. 1-4, the energy ring 400 being disposed around the intermediate portion 322.

It should be noted that the energy ring 400 is an energy emitting device for assisting therapy, and can emit at least one of sound energy, light energy and electric energy to the affected part to make the affected part tissue more sensitive to the ultrasonic wave, thereby improving the therapeutic effect. Furthermore, in the present invention, the energy ring 400 is disposed around the middle portion 322, so that the space around the middle portion 322 is effectively utilized, and the function of the catheter assembly 10 is expanded without increasing the volume of the assembly.

As a preferred embodiment of the present invention, the inner diameter of the energy ring 400 can be adjusted to vary the size of the intermediate portion 322. When the inner diameter of the energy ring 400 is reduced, the middle portion 322 can be squeezed, so as to change the positions of the outer surfaces of the first end portion 321 and the second end portion 323, and change the included angle between the outer surfaces of the two ultrasonic transducers 310 and the axial direction of the catheter 100.

As an embodiment, the energy ring 400 may be hollow, the inner diameter of the energy ring 400 may be made smaller by filling fluid (e.g., gas or liquid) into the energy ring 400, and the inner diameter of the energy ring 400 may be made larger by releasing the fluid filled in the energy ring 400.

Preferably, as shown in fig. 1-4, the catheter assembly 10 further comprises an acoustically transparent membrane 500, and the acoustically transparent membrane 500 forms an enclosed ultrasound cavity with the urinary catheter 100, within which the ultrasound transducer array 300 is disposed.

The utility model discloses a setting up of sound-permeable membrane 500 separates ultrasonic transducer group 300 and human normal tissue, has further avoided the harm of the high temperature that ultrasonic transducer group 300 produced to human normal tissue to when the individual component on ultrasonic transducer group 300 drops or produces the piece, the component and the piece that drop can be restricted in confined supersound chamber, can not fall into the human body and produce harmful effects.

Preferably, as shown in fig. 1, the wall of catheter 100 is formed with a coolant inflow channel 510 and a coolant outflow channel 520, and coolant inflow channel 510 and coolant outflow channel 520 are in communication with the ultrasound cavity.

It is easy to understand that the cooling liquid inflow channel 510 and the cooling liquid outflow channel 520 of the present invention are used to introduce and lead the cooling liquid into and out of the ultrasonic cavity to absorb the heat generated by the ultrasonic transducer set 300, so as to avoid the damage of the high temperature to the human body.

The utility model discloses it is right the coolant liquid composition that fills in the ultrasonic cavity does not do specifically and restricts, as long as can not influence ultrasonic normal propagation when playing the cooling action can. As a preferred embodiment of the present invention, the cooling liquid may include deaerated water.

Preferably, as shown in fig. 1, the side wall of catheter 100 is formed with a cooling liquid inlet 511 and a cooling liquid outlet 521, and cooling liquid inflow channel 510 is communicated with the ultrasonic cavity through cooling liquid inlet 511; the coolant outflow channel 520 communicates with the ultrasound chamber through a coolant outlet 521. A cooling fluid inlet 511 is arranged at a side of the ultrasonic transducer set 300 near the insertion end of the urinary catheter 100; a cooling fluid outlet 521 is provided at the side of the ultrasonic transducer set 300 remote from the insertion end of the urinary catheter 100.

The utility model discloses set up coolant liquid entry 511 in the one side that ultrasonic transducer group 300 is close to the end that inserts of catheter 100, set up coolant liquid outlet 521 in the one side that ultrasonic transducer group 300 kept away from the end that inserts of catheter 100, improved the cooling efficiency of coolant liquid.

To facilitate precise temperature control, the catheter assembly 10 preferably further comprises a temperature sensing element 530, as shown in fig. 1, the temperature sensing element 530 being disposed within the ultrasound cavity.

The utility model discloses be provided with temperature detection element 530 in the supersound intracavity to can accurate monitoring temperature and in time control coolant liquid velocity of flow in order to adjust.

To avoid changes in the position of catheter assembly 10 in the body during treatment, catheter assembly 10 preferably further comprises a positioning balloon 600, as shown in fig. 1, positioning balloon 600 being disposed on catheter 100, and positioning balloon 600 being located between the insertion end of catheter 100 and ultrasound transducer set 300.

It is easily understood that the utility model discloses inserting the end at catheter assembly 10 and setting up location sacculus 600, after catheter assembly 10 reachd the assigned position, aerify or fill water to location sacculus 600, make its inflation withstand the surface of human structures such as urethra to stabilize the relative position relation between catheter assembly 10 and the human body, avoid the catheter position to take place to remove and influence the ultrasonic wave precision of focusing.

As a second aspect of the present invention, there is also provided an ultrasonic ablation apparatus, comprising an external transducer and a catheter assembly, wherein the catheter assembly is the catheter assembly 10 described above, and the external transducer is used for emitting external ultrasonic waves to the position of the ultrasonic focus of the catheter assembly 10.

The utility model provides an among the ultrasonic ablation equipment, catheter assembly 10 can be through two ultrasonic transducer 310 by secret positions such as urethra to the affected part accurate focusing ultrasonic wave, and because the utility model discloses a catheter assembly 10 focuses at human inside, and the distance between catheter assembly 10 and the affected part is more nearly to can utilize energy still less to reach treatment, still avoid the injury of the high temperature that the subassembly produced under high power state to normal tissues such as patient's urethra when the energy saving.

In addition, the utility model discloses an outside transducer can be by human outside to the affected part transmission ultrasonic wave at catheter subassembly 10 during operation, further reduces the power that catheter subassembly 10 need be sent out, promotes and melts the effect.

The predetermined sequence may be that the ultrasonic transducer set in the catheter assembly is started first and the external transducer is controlled to be started later, or that the external transducer is started first and the ultrasonic transducer set in the catheter assembly is started later. Of course, the predetermined sequence may also be such that the set of ultrasonic transducers in the catheter assembly and the external transducer are activated simultaneously.

Preferably, the predetermined sequence is that the set of ultrasonic transducers in the catheter assembly is activated first and the external transducer is controlled and activated later, and the power of the external transducer is greater than the power of the set of ultrasonic transducers.

When the ultrasonic ablation equipment is operated, the control module is firstly utilized to control the ultrasonic transducer group to emit a small amount of ultrasonic energy, a partial coagulability necrosis area is formed by focusing at a target tissue, and then the control module controls the external transducer to generate ultrasonic waves with higher power to focus at the target area for ablation. As shown in fig. 5, the external transducer of the present invention emits an external ultrasonic wave S2 from the outside of the human body to the coagulative necrotic area a1 after the catheter assembly 10 emits an ultrasonic wave S1 to the affected part to generate the coagulative necrotic area a1, and the property that the coagulative necrotic area has a blocking effect on the ultrasonic energy is utilized to deposit the focal energy of the external ultrasonic wave S2 in the ultrasonic energy deposition area a2 below the coagulative necrotic area, so that a large amount of heat is generated in the ultrasonic energy deposition area a2, and the ablation effect is further improved. Meanwhile, as the blood flow is blocked by the coagulation necrosis area generated in advance, the heat generated by the ultrasonic energy is easier to control in the target treatment range required to be treated, and the ablation effect is further improved.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. The utility model provides a catheter assembly, catheter assembly includes the catheter, its characterized in that, catheter assembly still includes adjusts subassembly and at least one ultrasonic transducer group, every ultrasonic transducer group all includes two ultrasonic transducer, and two ultrasonic transducer in same ultrasonic transducer group are followed the axis direction interval ground of catheter sets up the periphery of catheter, adjust the subassembly and be used for adjusting ultrasonic transducer's surface with angle between the axis direction of catheter to make the ultrasonic wave that two ultrasonic transducer in each ultrasonic transducer group sent converge or focus.

2. The catheter assembly of claim 1, wherein the ultrasonic transducers have through-holes, the catheter passing through the through-hole of each of the ultrasonic transducers.

3. The catheter assembly of claim 1, wherein the ultrasonic transducers comprise a plurality of transducer wafers, the transducer wafers are arranged around the outer surface of the catheter, a space exists between two adjacent transducer wafers in the same ultrasonic transducer, and the adjusting assembly can adjust an angle between a surface of the transducer wafer, which faces away from the catheter, and the axial direction of the catheter.

4. The catheter assembly of claim 3, wherein the set of ultrasonic transducers further comprises a backing tube, a portion of the catheter being disposed within a lumen of the backing tube, the transducer wafer being disposed on an outer surface of the backing tube.

5. The catheter assembly of claim 4, wherein the backing tube includes a first end portion, an intermediate portion, and a second end portion arranged in this order along the axial direction of the backing tube, the first end portion having a first slot formed therein and extending in the axial direction of the backing tube, an end opening of the first slot being located on an end surface of the first end portion, and the first slot penetrating the backing tube in the thickness direction, the second end portion having a second slot formed therein and extending in the axial direction of the backing tube, an end opening of the second slot being located on an end surface of the second end portion, and the second slot penetrating the backing tube in the thickness direction;

6. The catheter assembly of claim 5, wherein the adjustment assembly comprises a plurality of volume adjustable adjustment bladders, at least one of the adjustment bladders being disposed between the first end portion and the catheter, and at least one of the adjustment bladders being disposed between the second end portion and the catheter.

7. The catheter assembly of claim 6, wherein a fluid channel is formed in a wall of the catheter, the fluid channel being in communication with the conditioning bladder, the fluid channel including a fluid inlet and a fluid outlet.

8. The catheter assembly of claim 7, wherein the adjustment bladder is integrally formed with the catheter.

9. The catheter assembly of claim 5, wherein the set of ultrasonic transducers further comprises an energy ring disposed around the intermediate portion.

10. The catheter assembly of claim 9, wherein an inner diameter of the energy ring is adjustable to vary a size of the intermediate portion.

11. The catheter assembly of any one of claims 1-10, wherein the catheter assembly further comprises an acoustically transparent membrane and wherein the acoustically transparent membrane and the catheter form a closed ultrasound cavity therebetween, the ultrasound transducer array being disposed within the ultrasound cavity.

12. The catheter assembly of claim 11, wherein the catheter has a wall defining a coolant inlet channel and a coolant outlet channel, both of which are in communication with the ultrasound lumen.

13. The catheter assembly of claim 12, further comprising a temperature sensing element disposed within the ultrasound lumen.

14. The catheter assembly of any one of claims 1-10, further comprising a positioning balloon disposed on the catheter and located between the insertion end of the catheter and the set of ultrasonic transducers.

15. An ultrasound ablation device comprising an external transducer and a catheter assembly, wherein the catheter assembly is a catheter assembly according to any one of claims 1 to 14, the external transducer being adapted to emit external ultrasound waves towards the location of ultrasound focusing of the catheter assembly.

16. An ultrasound ablation device according to claim 15 further comprising a control module for controlling the group of ultrasound transducers in the catheter assembly and the external transducer to be activated in a predetermined sequence.