CN117958910A - Ultrasonic catheter system - Google Patents

Abstract

The present application provides an ultrasound catheter system comprising: the catheter is provided with an ablation assembly, a first thin-wall tube sleeved on the outer side of the catheter and enclosing the ablation assembly, and a second thin-wall tube sleeved on the outer side of the first thin-wall tube; the part of the first thin-wall tube surrounding the ablation assembly is configured into a first bag body, the second thin-wall tube is configured into a second bag body with a variable inner volume and surrounding at least the first bag body, the catheter is respectively communicated with the first bag body and the second bag body, and the catheter respectively conveys transmission media to the first bag body and the second bag body and enables the second bag body to be expanded outwards to an expanded state. According to the application, the first bag body and the second bag body realize that the tissue to be ablated of the gas-containing part can be ablated when the gas-containing part of the lung works.

Description

Ultrasonic catheter system

Technical Field

The invention relates to the technical field of medical instruments, in particular to an ultrasonic catheter system.

Background

The lung nodule refers to focal circular dense shadows with a diameter of 3cm or less and with various sizes, clear edges or blurred edges on the lung image. The ultrasonic ablation operation of the lung nodule is a minimally invasive physical ablation technology and is a novel method for clinical treatment. The principle is that the pulmonary nodule is thermally coagulated by using high-energy and high-intensity ultrasonic waves, so that the purpose of eliminating or reducing the pulmonary nodule is achieved.

However, in the process of ablating tissue to be ablated (lung nodule or tumor) in the lung of a patient, the interventional device with the ultrasonic ablation function in the prior art contains more gas in the lung, and ultrasonic energy cannot be transmitted in air, so that the interventional device with the ultrasonic ablation function in the prior art is difficult to ablate the tissue to be ablated in the gas-containing part when working in the lung gas-containing part.

Accordingly, there is a need to design an ultrasound catheter system that is capable of operating at a gas-containing site in the lung and effecting ablation of tissue to be ablated at the gas-containing site.

Disclosure of Invention

The invention aims to disclose an ultrasonic catheter system which is used for solving a plurality of defects of interventional devices with ultrasonic ablation functions in the prior art, and particularly aims to realize ablation of tissue to be ablated of a gas-containing part when the gas-containing part of the lung works.

To achieve the above object, the present invention provides an ultrasound catheter system comprising: the catheter is provided with an ablation assembly, a first thin-wall tube sleeved on the outer side of the catheter and enclosing the ablation assembly, and a second thin-wall tube sleeved on the outer side of the first thin-wall tube;

the part of the first thin-wall tube surrounding the ablation assembly is configured into a first bag body, the second thin-wall tube is configured into a second bag body with a variable inner volume and surrounding at least the first bag body, the catheter is respectively communicated with the first bag body and the second bag body, and the catheter respectively conveys transmission media to the first bag body and the second bag body and enables the second bag body to be expanded outwards to an expanded state.

As a further improvement of the invention, the end part of the catheter, which is close to the ablation assembly, is concavely arranged inwards along the radial direction to form a step pipe section, the pipe wall thickness of the step pipe section is smaller than that of the catheter, and two ends of the second thin-wall pipe are respectively formed on the part of the first thin-wall pipe, which is sleeved with the step pipe section, and the part of the first thin-wall pipe, which extends through the ablation assembly.

As a further improvement of the invention, the second capsule is coaxially enclosed with the first capsule.

As a further development of the invention, the catheter is configured with at least one delivery channel which communicates with the first balloon and which feeds in or discharges a transfer medium to the first balloon, and with at least one delivery channel which communicates with the second balloon and feeds in or discharges a transfer medium to the second balloon, the delivery channel being isolated from the delivery channel.

As a further improvement of the invention, the conveying channel is configured as a diversion trench formed by recessing the outer pipe wall of the catheter attached to the first thin-wall pipe, and the diversion trench extends to the end part of the catheter, which is close to the ablation assembly, along the longitudinal direction of the catheter and is isolated from the first capsule body by being matched with the first thin-wall pipe;

The first thin-wall pipe is provided with a diversion hole communicated with the diversion trench, and the second bag body encloses the part of the first thin-wall pipe provided with the diversion hole so that the diversion trench is communicated with the second bag body.

As a further improvement of the present invention, the delivery channel comprises: the first delivery channel and the second delivery channel of the first capsule body are communicated, the first delivery channel penetrates through the catheter along the central axis of the catheter, the second delivery channel is formed by concavely arranging the catheter on the outer tube wall of the first thin-wall tube in a fitting mode, and the second delivery channel extends along the longitudinal direction of the catheter and penetrates through one end, close to the first capsule body, of the catheter.

As a further improvement of the present invention, the ablation assembly includes: a base, and an energy generating unit disposed on the base.

As a further improvement of the present invention, the ablation assembly includes: the imaging device comprises a base, and an imaging unit and an energy generating unit which are arranged on the base and are separated along the circumferential direction of the base.

As a further improvement of the present invention, the catheter includes: the rotating shaft is coaxially arranged in the first delivery channel and fixedly connected with the base, the rotating shaft drives the base to rotate along the central axis of the catheter, the guide piece is arranged at one end of the first thin-wall tube, extends through the ablation assembly, and the support piece is arranged along the central axis of the catheter, is arranged at the guide piece and forms a rotating fit with the base.

As a further improvement of the present invention, the ultrasound catheter system further comprises: the shell is coaxially and sequentially internally provided with a connection cabin, a sealing joint and a control mechanism of the shell;

The catheter is far away from the part of the tube body of the ablation assembly penetrates through the shell and is embedded in the engagement cabin, transmission media are input or discharged into the catheter through the engagement cabin, the sealing joint is in sealing connection with one end of the engagement cabin far away from the catheter, the rotating shaft continuously penetrates through the engagement cabin and the sealing joint to be connected with the control mechanism, the rotating shaft is in rotary sealing connection with the sealing joint, and the control mechanism is in rotary connection with the shell and drives the rotating shaft to rotate in the first delivery channel.

As a further improvement of the invention, the connection cabin is configured to be communicated with a liquid inlet channel of the first delivery channel and a liquid inlet joint of the liquid inlet channel, the first thin-wall pipe is provided with liquid outlet holes and liquid delivery holes which are distributed at intervals and are respectively communicated with the second delivery channel and the diversion trench and are formed in the connection cabin, and the connection cabin is configured to be respectively communicated with a liquid outlet cavity and a liquid delivery cavity of the liquid delivery hole and a liquid delivery joint of the liquid outlet cavity and the liquid delivery cavity.

As a further improvement of the invention, the engagement cabin is concavely arranged radially inwards to form a step concave part for the axial supporting of the guide pipe so as to isolate the guide groove and the second delivery channel from the liquid inlet channel.

Compared with the prior art, the invention has the beneficial effects that: the ultrasonic catheter system comprises a first balloon, a second balloon, a catheter, a delivery medium, an ablation assembly, a second balloon, a first balloon and a second balloon, wherein the delivery medium is respectively conveyed to the first balloon and the second balloon through the catheter, the delivery medium is filled in the first balloon and the second balloon, so that the ablation assembly is soaked in the delivery medium in the first balloon, the second balloon is expanded outwards along with continuous injection of the delivery medium to be switched from an unexpanded state to an expanded state until the balloon wall of the second balloon is pressed against the tissue to be ablated, the second balloon is kept in the expanded state, the first balloon is soaked in the delivery medium in the second balloon, the ultrasonic energy generated by the ablation assembly is transmitted outwards through the delivery medium in the first balloon and is transmitted to the second balloon through the first balloon, and the ultrasonic energy is continuously transmitted outwards through the delivery medium in the second balloon and is transmitted through the balloon wall of the second balloon, so that ablation of the tissue to be ablated is difficult to realize ablation of the tissue to be ablated when the interventional device with an ultrasonic ablation function works on the part containing gas in the lung in the prior art.

Drawings

FIG. 1 is an overall schematic of an ultrasound catheter system according to the present disclosure;

FIG. 2 is a cross-sectional view of the ultrasound catheter system of FIG. 1 taken along line A-A;

FIG. 3 is an enlarged view of a portion of the junction housing of FIG. 2 connected to a sealing joint;

FIG. 4 is an enlarged view of a portion of the second bladder of FIG. 2 enclosing the first bladder;

FIG. 5 is an enlarged partial cross-sectional view of the connection of the B-B cut catheter of FIG. 2 with the first and second thin-walled tubes;

FIG. 6 is a cross-sectional view of the connection of the C-C cut catheter of FIG. 5 with a first thin-walled tube;

FIG. 7 is a schematic illustration of a first thin-walled tube sleeved on a catheter, wherein the catheter is shown in phantom;

Fig. 8 is a schematic perspective view of the guide groove concavely arranged on the guide pipe, wherein the second delivery channel is shown by a dotted line.

Detailed Description

The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.

In particular, in the following embodiments, the term "axial direction" refers to a direction indicated by a central axis P (hereinafter, or simply referred to as an axis P) of the catheter 10 in fig. 5.

An embodiment of an ultrasound catheter system is disclosed with reference to fig. 1-8.

Referring to fig. 4 and 5, in the present embodiment, the ultrasound catheter system 100 includes: a catheter 10 provided with an ablation assembly 20, a first thin-wall tube 30 sleeved outside the catheter 10 and enclosing the ablation assembly 20, and a second thin-wall tube 40 sleeved outside the first thin-wall tube 30; the portion of the first thin-walled tube 30 surrounding the ablation assembly 20 is configured as a first balloon 31, the second thin-walled tube 40 is configured as a second balloon 41 having a variable internal volume and surrounding at least the first balloon 31, the catheter 10 communicates with the first balloon 31 and the second balloon 41, respectively, and the catheter 10 delivers a delivery medium to the first balloon 31 and the second balloon 41, respectively, and expands the second balloon 41 outwardly into an expanded state.

When the catheter 10 guides the ablation assembly 20 to the part (for example, bronchus) containing gas in the lung and aims at the tissue to be ablated, the catheter 10 respectively conveys the transmission media (for example, physiological saline) to the inside of the first balloon 31 and the second balloon 41, and fills the transmission media into the first balloon 31 and the second balloon 41 so as to soak the ablation assembly 20 in the transmission media in the first balloon 31, simultaneously, the second balloon 41 expands outwards along with continuous injection of the transmission media in a radial direction to switch from an unexpanded state to an expanded state until the balloon wall (not marked) of the second balloon 41 circumferentially abuts against the bronchus wall and abuts against the tissue to be ablated, so as to position the tissue to be ablated through the second balloon 41, then stops injecting the transmission media into the second balloon 41, keeps the second balloon 41 in the expanded state and is fixed in the bronchus, the ablation assembly 20 is enclosed by the first balloon 31, so that the first balloon 31 is prevented from being deviated to one side wall of the bronchus due to the influence of the form of the bronchus and the internal stress of the catheter 10, the ablation assembly 20 is centered with the bronchus in the first balloon 31, so that the ultrasonic energy generated by the ablation assembly 20 can be accurately aligned with the tissue to be ablated, meanwhile, the first balloon 31 is soaked in the transmission medium in the second balloon 41, so that the ultrasonic energy generated by the ablation assembly 20 is transmitted outwards through the transmission medium in the first balloon 31 and transmitted to the second balloon 41 through the first balloon 31, the ultrasonic energy is continuously transmitted outwards through the transmission medium in the second balloon 41 and transmitted through the balloon wall of the second balloon 41, so that the ultrasonic energy can accurately ablate the tissue to be ablated, the ultrasonic catheter system 100 thus solves the problem that the prior art interventional device with ultrasonic ablation function is difficult to ablate the tissue to be ablated in the bronchus when working in the bronchus of the lung.

In addition, the ablation assembly 20 is enclosed by the first capsule body 31, so that the situation that the ablation assembly 20 cannot be centered with bronchus due to the shape of the bronchus and the influence of the internal stress of the catheter 10 can be avoided, the ultrasonic energy generated by the ablation assembly 20 is prevented from deviating from the tissue to be ablated, and the damage to unnecessary ablation tissue caused by ablation dislocation is avoided. The heat generated during the operation of the ablation assembly 20 is absorbed through the transmission medium in the first capsule body 31, the ablation assembly 20 can be cooled, the first capsule body 31 can be cooled through the transmission medium in the second capsule body 41, the first capsule body 31 is prevented from being burnt out due to the fact that the heat generated by the ablation assembly 20 is too high, the first capsule body 31 is enclosed through the second capsule body 41 due to the fact that the ablation assembly 20 contains heavy metals, and the heavy metals mixed in the transmission medium in the first capsule body 31 can be prevented from leaking to the lung of a patient. The ablation assembly 20 is surrounded by the lamination of the first balloon 31 and the second balloon 41 to further provide physical protection to the ablation assembly 20, reducing the risk of damaging the ablation assembly 20.

In this embodiment, the first balloon 31 is preferably a non-compliant balloon, and the second balloon 41 is preferably a balloon with good compliance, and the volume of the second balloon 41 is typically 5 times that of the non-inflated state.

Further, referring to fig. 4, 5, 7 and 8, the end of the catheter 10 near the ablation assembly 20 is concavely arranged radially inwards to form a stepped tube section 13, the wall thickness of the stepped tube section 13 is smaller than that of the catheter 10, and two ends of the second thin-wall tube 40 are respectively formed at the part of the first thin-wall tube 30 sleeved with the stepped tube section 13 and the part of the first thin-wall tube 30 extending through the ablation assembly 20. The inner diameter of the tube body of the stepped tube section 13 is equal to the inner diameter of the tube body of the catheter 10. The first thin-wall tube 30 is sleeved outside the catheter 10 and extends to the step tube section 13 and the ablation assembly 20, the first thin-wall tube 30 is connected with the catheter 10 and the step tube section 13 in a sealing mode through bonding and the like, the second thin-wall tube 40 is sleeved on the first thin-wall tube 30 and is connected with the first thin-wall tube 30 in a sealing mode through bonding and the like, two ends of the second thin-wall tube 40 along the axis direction of the catheter 10 are respectively formed on the part, sleeved with the step tube section 13, of the first thin-wall tube 30 and the part, extending through the ablation assembly 20, of the first thin-wall tube 30, sleeved outside the part, sleeved with the step tube section 13, of the first thin-wall tube 40, so that the first thin-wall tube 30 and the second thin-wall tube 40 are installed outside the catheter 10 in a layering mode, the second bag body 41 encloses the first bag body 31, the radial size of the catheter 10 provided with the first thin-wall tube 30 and the second thin-wall tube 40 is effectively reduced, and the application range of the ultrasound catheter system 100 in bronchi with different inner diameters is improved, such as a left main bronchus, a right main bronchus, a left main bronchus and a left lower bronchus. Preferably, the total thickness of the wall thickness of the stepped pipe section 13 and the first and second thin-walled pipes 30 and 40 is less than or equal to the wall thickness of the catheter 10.

Further, referring to fig. 5, the first thin-walled tube 30 is sleeved on the catheter 10 along the axis P of the catheter 10, the second thin-walled tube 40 is coaxially sleeved on the first thin-walled tube 30, and the second balloon 41 is coaxially surrounded on the first balloon 31. In the outward expansion process of the second balloon 41, the balloon wall (not labeled) of the second balloon 41 can be uniformly expanded outward and the radial expansion amplitude is the same, so that the second balloon 41 can be ensured to prevent the ablation assembly 20 from shifting when the second balloon 41 is pressed against the tissue to be ablated, the ablation assembly 20 can be ensured to be centered with the bronchus in the first balloon 31, and the ablation assembly 20 can be prevented from damaging unnecessary ablation tissue in the ablation process of the tissue to be ablated.

Referring to fig. 3 to 5, in particular, the catheter 10 is constructed with at least one delivery passage 11 communicating with the first balloon 31 and inputting or outputting a transmission medium to or from the first balloon 31, and at least one delivery passage 12 communicating with the second balloon 41 and inputting or outputting a transmission medium to or from the second balloon 41, the delivery passage 11 being isolated from the delivery passage 12. Before the ablation assembly 20 performs the ablation operation, the catheter 10 respectively inputs transmission media into the first capsule 31 and the second capsule 41 through the delivery channel 11 and the delivery channel 12, and as the delivery channel 11 is isolated from the delivery channel 12, the transmission media conveyed by the delivery channel 11 and the delivery channel 12 are prevented from being mixed, so that the transmission media with different flow rates are respectively input into the first capsule 31 and the second capsule 41 under control, and the expansion amplitude of the second capsule 41 is regulated according to bronchi with different inner diameters of the lung in actual use, so that the second capsule 41 supports against the tissue to be ablated. During the operation of the ablation assembly 20, the transmission medium in the first capsule body 31 can transmit the ultrasonic energy generated by the ablation assembly 20 and cool the heat generated during the ablation operation of the ablation assembly 20, the transmission medium in the second capsule body 41 can transmit the ultrasonic energy generated by the ablation assembly 20 and cool the first capsule body 31, so that the first capsule body 31 is prevented from being burnt out due to the overhigh heat generated by the ablation assembly 20, and after the tissue to be ablated is eliminated by the ablation assembly 20, the transmission medium is discharged in the second capsule body 41 through the conveying channel 12, so that the second capsule body 41 contracts inwards in the radial direction and is switched from an expanded state to an unexpanded state.

Referring to fig. 5 to 8, in the present embodiment, the delivery channel 12 is preferably configured as a guide groove 121 formed by recessing an outer tube wall of the catheter 10 attached to the first thin-walled tube 30, and the guide groove 121 extends along the longitudinal direction of the catheter 10 to an end portion of the catheter 10 near the ablation assembly 20 and is isolated from the first balloon 31 in cooperation with the first thin-walled tube 30; the first thin-wall pipe 30 is provided with a diversion hole 32 communicated with the diversion trench 121, and the second bag 41 encloses the part of the first thin-wall pipe 30 provided with the diversion hole 32 so that the diversion trench 121 is communicated with the second bag 41. The outer tube wall of the catheter 10 is concavely provided with a diversion trench 121, the diversion trench 121 is arranged along the longitudinal direction of the catheter 10 and extends to the end part of the catheter 10, which is close to the ablation assembly 20, the first thin-wall tube 30 is in sealing connection with the catheter 10 and the step tube section 13 in a bonding mode or the like, so that the transmission medium conveyed by the diversion trench 121 is prevented from leaking to the first bag body 31 through the joint of the catheter 10 attached to the first thin-wall tube 30, the diversion trench 121 is isolated from the first bag body 31, the diversion trench 121 is prevented from being communicated with the first bag body 31, and the transmission medium flow conveyed to the first bag body 31 and the second bag body 41 is further managed separately. The catheter 10 conveys the transmission medium to the second capsule 41 through the diversion trench 121, the diversion trench 121 inputs or discharges the transmission medium into the second capsule 41 through the diversion trench 32, and the processing difficulty of the catheter 10 can be reduced by opening the diversion trench 121 on the outer wall of the catheter 10, so that the throughput of inputting or discharging the transmission medium into the second capsule 41 is improved.

Illustratively, in some embodiments, the delivery channel 12 is configured to extend through a portion of a lumen (not shown) of the catheter 10 in the axial direction of the catheter 10, the lumen extending to an end of the catheter 10 where the ablation assembly 20 is disposed and isolated from the first balloon 31; the catheter 10 and the first thin-walled tube 30 are continuously provided with drainage holes (not shown) forming a communication cavity, and the second bag body 41 encloses the part of the first thin-walled tube 30 provided with the drainage holes so that the cavity can be communicated with the second bag body 41. The lumen is not in communication with the first balloon 31, the catheter 10 delivers the transfer medium to the second balloon 41 through the lumen, and the lumen inputs or outputs the transfer medium into or from the second balloon 41 through the drainage aperture.

As shown in fig. 5 to 8, in the present embodiment, preferably, the delivery channel includes: the first delivery channel 111 and the second delivery channel 112 of the first balloon 31 are communicated, the first delivery channel 111 penetrates through the catheter 10 along the axis P of the catheter 10, the second delivery channel 112 is formed by concavely arranging the catheter 10 on the outer tube wall of the first thin-walled tube 30, and the second delivery channel 112 extends along the longitudinal direction of the catheter 10 and penetrates through one end, close to the first balloon 31, of the catheter 10. The first delivery channel 111 and the second delivery channel 112 are isolated from the diversion trench 121, and the second delivery channel 112 is disposed along the longitudinal direction of the catheter 10 and is communicated with the first balloon 31. The first delivery channel 111 is used for inputting a transmission medium into the first capsule body 31 so as to soak the ablation assembly 20 in the transmission medium in the first capsule body 31, so that the transmission medium is provided for ultrasonic energy generated by the ablation assembly 20, heat generated by the ablation assembly 20 during operation is absorbed to cool the ablation assembly 20, the transmission medium after the heat is absorbed in the first capsule body 31 is discharged in the first capsule body 31 through the second delivery channel 112, circulation is realized for the transmission medium in the first capsule body 31, the internal temperature of the first capsule body 31 is controlled, and the excessive heat generated by the ablation assembly 20 is prevented from burning the first capsule body 31. And by opening the second delivery channel 112 on the outer wall of the catheter 10, the processing difficulty of the catheter 10 can be reduced, the flow quantity of the transmission medium input or discharged in the first capsule 31 can be increased, and the circulating cooling effect on the ablation assembly 20 can be increased.

Illustratively, in some embodiments, the ablation assembly 20 includes: a base 21, and an energy generating unit 23 disposed on the base 21. During delivery of catheter 10 to the patient's lungs, the location of the tissue to be ablated in the patient may be determined by CT imaging or other medical imaging means to deliver energy generating unit 23 to the bronchi and to align the tissue to be ablated.

Preferably, in this embodiment, referring to fig. 4 and 5, the ablation assembly 20 includes: a base 21, and an imaging unit 22 and an energy generating unit 23 which are disposed on the base 21 and are separated from each other in a circumferential direction of the base 21; the base 21 is configured with a spacer 24 interposed between the imaging unit 22 and the energy generating unit 23 to block signals between the imaging unit 22 and the energy generating unit 23 by the spacer 24, thereby avoiding mutual interference. During delivery of the catheter 10 to the patient's lungs, the location of the tissue to be ablated in the bronchi is determined by the imaging unit 22 to deliver the energy generating unit 23 to the bronchi and to align the tissue to be ablated.

Further, the catheter 10 includes: the shaft 15 is coaxially disposed in the first delivery channel 111 and fixedly connected to the base 21, the shaft 15 drives the base 21 to rotate along the axis P of the catheter 10, the guide 14 disposed at one end of the first thin-walled tube 30 extending through the ablation assembly 20, and the support 16 disposed along the axis P of the catheter 10 on the guide 14 and forming a rotating fit with the base 21. The guide piece 14 extends out of the first thin-wall tube 30 and forms a guide end 141, the catheter 10 is delivered to the bronchus of the lung of a patient through the guide piece 14 and reaches the tissue to be ablated, the tissue to be ablated is confirmed through the imaging unit 22, and then the base 21 is driven to axially rotate through the rotating shaft 15, so that the working surface of the energy generating unit 23 faces the tissue to be ablated, and the tissue to be ablated is precisely ablated through ultrasonic energy generated by the energy generating unit 23. The rotation shaft 15 and the base 21 are preferably fixedly connected by laser welding, so as to ensure the synchronism of the rotation shaft 15 driving the base 21 to axially rotate. The support member 16 extends at least partially axially through the base member 21, the base member 21 being configured to receive a movable slot (not shown) of the support member 16 for rotational engagement with the support member 16, the support member 16 acting to axially support the base member 21 during rotation of the base member 21 about the axis P to improve stability of the base member 21 in axial rotation within the first balloon 31 to prevent misalignment and thereby ensure centering of the ablation assembly 20 with the bronchi.

In particular, referring to fig. 1-3, the ultrasound catheter system 100 further includes: the shell 50 is coaxially and sequentially internally provided with a joint cabin 60, a sealing joint 70 and a control mechanism 80 of the shell 50; the part of the catheter 10 far away from the ablation assembly 20 penetrates through the shell 50 and is embedded in the engagement cabin 60, the transmission medium is input or discharged to the catheter 10 through the engagement cabin 60, the sealing joint 70 is connected to one end of the engagement cabin 60 far away from the catheter 10 in a sealing mode, the rotating shaft 15 continuously penetrates through the engagement cabin 60 and the sealing joint 70 to be connected with the control mechanism 80, the rotating shaft 15 and the sealing joint 70 form rotary sealing connection, and the control mechanism 80 is connected with the shell 50 in a rotary mode and drives the rotating shaft 15 to rotate in the first delivery channel 111. The transfer medium is transported through the adapter capsule 60 to the delivery channel 11 and the transport channel 12 within the catheter 10. The shell 50 is radially inwards provided with a plurality of groups of limiting structures 51 which are used for circumferentially abutting against the engagement cabin 60, the sealing joint 70 and the control mechanism 80, and the engagement cabin 60, the sealing joint 70 and the control mechanism 80 are stably limited in the shell 50 through the limiting structures 51; the outer periphery of the control mechanism 80 is sleeved with a plurality of bearings (not shown) clamped on the limiting structure 51, and the control mechanism 80 is rotatably connected with the shell 50 through the bearings, so that an external driving device (not shown) drives the control mechanism 80 to drive the rotating shaft 15 to axially rotate in the shell 50. In this embodiment, the limiting structure 51 adopts limiting plates (not labeled) symmetrically disposed along the radial direction on the inner periphery of the housing 50, the limiting plates form grooves (not labeled) for engaging the cabin 60, the sealing joint 70 and the outer periphery of the control mechanism 80, and in other alternative embodiments, the limiting structure 51 may also adopt other structures with limiting functions. The engagement chamber 60 is configured to engage the fixed end 68 within the housing 50 to improve the stability of the engagement chamber 60 disposed within the housing 50.

Specifically, referring to fig. 3, the end of the engagement chamber 60 opposite to the conduit 10 is configured as a sealing end 69, the sealing joint 70 is configured as a tapered connection portion 72 extending into the sealing end 69 and having a tapered outer diameter, the tapered connection portion 72 is screwed with the sealing end 69 to ensure tightness of the connection of the sealing joint 70 with the engagement chamber 60, prevent the connection of the sealing joint 70 with the engagement chamber 60 from loosening or falling off, and effectively prevent leakage of a transmission medium in the engagement chamber 60. The sealing joint 70 is coaxially provided with a coupling member 71, and the rotating shaft 15 penetrates the coupling member 71 and axially rotates relative to the coupling member 71, in this embodiment, the coupling member 71 is preferably made of silicone, and since silicone has good lubricity and elasticity, the rotating shaft 15 smoothly rotates relative to the coupling member 71, and leakage of transmission medium can be prevented during rotation.

Specifically, referring to fig. 2, 3 and 7, the connection chamber 60 is configured to communicate with the liquid inlet channel 61 of the first delivery channel 111 and the liquid inlet connector 62 of the liquid inlet channel 61, the first thin-walled tube 30 is provided with the liquid outlet hole 34 and the liquid outlet hole 33 which are formed at intervals and respectively communicate with the second delivery channel 112 and the flow guide groove 121 and are formed in the connection chamber 60, and the connection chamber 60 is configured to communicate with the liquid outlet cavity 63 and the liquid outlet cavity 64 of the liquid outlet hole 34 and the liquid outlet hole 33, and the liquid outlet connector 65 and the liquid outlet connector 66 of the liquid outlet cavity 63 and the liquid outlet cavity 64. The ultrasound catheter system 100 further includes a fluid inlet tube 92, a fluid outlet tube 95, and a fluid delivery tube 96 that connect the fluid inlet connector 62, the fluid outlet connector 65, and the fluid delivery connector 66, respectively, and an external fluid supply device (not shown) that connects the fluid inlet tube 92, the fluid outlet tube 95, and the fluid delivery tube 96.

Referring to fig. 3 to 5 and 7, an external liquid supply device (not shown) injects a transmission medium into the liquid inlet joint 62 through the liquid inlet pipe 92, the transmission medium flows to the liquid inlet channel 61 in the direction indicated by an arrow d1 in fig. 3 in the liquid inlet joint 62, the transmission medium flows to the first delivery channel 111 through the liquid inlet channel 61, so that the transmission medium is injected into the first capsule 31 in the direction indicated by an arrow d9 in fig. 4 through the first delivery channel 111, the transmission medium is filled in the first capsule 31, so that the ablation assembly 20 is immersed in the transmission medium, the ultrasonic energy generated by the ablation assembly 20 is transmitted, the heat generated in the working process of the ablation assembly 20 is cooled, along with the continuous injection of the transmission medium into the first capsule 31, the transmission medium in the first capsule 31 flows to the second delivery channel 112 in the direction indicated by an arrow d10 in fig. 5, the second delivery channel 112 discharges the transmission medium to the liquid outlet cavity 63 through the liquid outlet hole 34, the external liquid supply device is communicated with the liquid outlet joint 65 through the liquid outlet pipe 95 so as to extract the transmission medium in the liquid outlet cavity 63, the transmission medium is absorbed in the liquid outlet cavity 63, the heat is prevented from being absorbed by the first capsule 31, and the heat generated by the first capsule 31 is prevented from entering the external capsule 31 in the direction indicated by the first capsule 31, and the external capsule 31 is prevented from being burnt out, and the external capsule 20 is prevented from flowing in the direction.

Meanwhile, referring to fig. 3 and 7, the external liquid supply device injects a transfer medium into the infusion connector 66 through the infusion tube 96, the transfer medium flows to the infusion cavity 64 in the direction indicated by an arrow d4 in fig. 3 in the infusion connector 66, the infusion cavity 64 inputs the transfer medium into the diversion trench 121 through the infusion hole 33, the diversion trench 121 injects the transfer medium into the second capsule 41 through the diversion hole 32 in the direction indicated by an arrow d8 in fig. 6, so that the second capsule 41 expands outwards, and is switched from an unexpanded state to an expanded state, and the second capsule 41 is kept in the expanded state after the tissue to be ablated is positioned, thereby centering the ablation assembly 20 in the first capsule 31 with the bronchus, immersing the first capsule 31 in the transfer medium in the second capsule 41, so that the ultrasonic energy generated by the ablation assembly 20 is transmitted outwards through the transmission medium in the first capsule body 31 and transmitted to the second capsule body 41 through the first capsule body 31, and then is continuously transmitted outwards through the transmission medium in the second capsule body 41, the ablation of the tissue to be ablated is realized through the capsule wall of the second capsule body 41, the transmission medium in the first capsule body 31 can absorb the heat generated by the ablation assembly 20 during operation, the cooling effect of the ablation assembly 20 can be achieved, the transmission medium in the second capsule body 41 cools the first capsule body 31, the excessive burning of the first capsule body 31 caused by the heat generated by the ablation assembly 20 is avoided, and after the ablation is finished, the transmission medium in the second capsule body 41 is pumped out through the infusion tube 96 through the infusion connector 66 along the direction indicated by an arrow d5 in fig. 3.

Further, referring to fig. 3, the engagement chamber 60 is concavely formed radially inward with a step recess 67 for the conduit 10 to axially support, so as to isolate the diversion trench 121 from the second delivery channel 112 from the liquid inlet channel 61, and prevent the transmission medium in the liquid inlet channel 61 from leaking from the connection between the conduit 10 and the step recess 67 to the diversion trench 121 and the second delivery channel 112.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (12)

1. An ultrasound catheter system, comprising:

The catheter is provided with an ablation assembly, a first thin-wall tube sleeved on the outer side of the catheter and enclosing the ablation assembly, and a second thin-wall tube sleeved on the outer side of the first thin-wall tube;

the part of the first thin-wall tube surrounding the ablation assembly is configured into a first bag body, the second thin-wall tube is configured into a second bag body with a variable inner volume and surrounding at least the first bag body, the catheter is respectively communicated with the first bag body and the second bag body, and the catheter respectively conveys transmission media to the first bag body and the second bag body and enables the second bag body to be expanded outwards to an expanded state.

2. The ultrasound catheter system of claim 1, wherein an end of the catheter proximal to the ablation assembly is recessed radially inward to form a stepped tube segment, the stepped tube segment having a tube wall thickness less than a tube wall thickness of the catheter, and wherein the second thin-walled tube is formed at both ends of the first thin-walled tube over a portion of the stepped tube segment and a portion of the first thin-walled tube extending through the ablation assembly, respectively.

3. The ultrasound catheter system according to claim 1, wherein the second balloon is coaxially enclosed with the first balloon.

4. The ultrasound catheter system according to claim 1, wherein the catheter is configured with at least one delivery channel communicating with the first balloon and inputting or outputting a transfer medium to or from the first balloon, and at least one delivery channel communicating with the second balloon and inputting or outputting a transfer medium to or from the second balloon, the delivery channel being isolated from the delivery channel.

5. The ultrasound catheter system according to claim 4, wherein the delivery channel is configured as a channel recessed from an outer tube wall of the catheter fitting the first thin-walled tube, the channel extending lengthwise of the catheter to an end of the catheter adjacent the ablation assembly and isolated from the first balloon in cooperation with the first thin-walled tube;

The first thin-wall pipe is provided with a diversion hole communicated with the diversion trench, and the second bag body encloses the part of the first thin-wall pipe provided with the diversion hole so that the diversion trench is communicated with the second bag body.

6. The ultrasound catheter system according to claim 5, wherein the delivery channel comprises: the first delivery channel and the second delivery channel of the first capsule body are communicated, the first delivery channel penetrates through the catheter along the central axis of the catheter, the second delivery channel is formed by concavely arranging the catheter on the outer tube wall of the first thin-wall tube in a fitting mode, and the second delivery channel extends along the longitudinal direction of the catheter and penetrates through one end, close to the first capsule body, of the catheter.

7. The ultrasound catheter system according to claim 6, wherein the ablation assembly comprises: a base, and an energy generating unit disposed on the base.

8. The ultrasound catheter system according to claim 6, wherein the ablation assembly comprises: the imaging device comprises a base, and an imaging unit and an energy generating unit which are arranged on the base and are separated along the circumferential direction of the base.

9. The ultrasound catheter system of claim 7 or 8, wherein the catheter comprises: the rotating shaft is coaxially arranged in the first delivery channel and connected with the base, the rotating shaft drives the base to rotate along the central axis of the catheter, the guide piece is arranged at one end of the first thin-wall tube, which extends through the ablation assembly, and the support piece is arranged along the central axis of the catheter, the guide piece and the support piece form a rotating fit with the base.

10. The ultrasound catheter system according to claim 9, wherein the ultrasound catheter system further comprises: the shell is coaxially and sequentially internally provided with a connection cabin, a sealing joint and a control mechanism of the shell;

The catheter is far away from the part of the tube body of the ablation assembly penetrates through the shell and is embedded in the engagement cabin, transmission media are input or discharged into the catheter through the engagement cabin, the sealing joint is in sealing connection with one end of the engagement cabin far away from the catheter, the rotating shaft continuously penetrates through the engagement cabin and the sealing joint to be connected with the control mechanism, the rotating shaft is in rotary sealing connection with the sealing joint, and the control mechanism is in rotary connection with the shell and drives the rotating shaft to rotate in the first delivery channel.

11. The ultrasound catheter system according to claim 10, wherein the engagement chamber is configured to communicate with a fluid inlet channel of the first delivery channel and with a fluid inlet connector of the fluid inlet channel, wherein the first thin-walled tube is formed with fluid outlet holes and fluid inlet holes that are spaced apart and respectively communicate with the second delivery channel and the fluid guide slot and are formed in the engagement chamber, and wherein the engagement chamber is configured to communicate with a fluid outlet chamber and a fluid inlet chamber of the fluid inlet hole and with a fluid outlet connector and a fluid inlet connector of the fluid outlet chamber and the fluid inlet chamber.

12. The ultrasonic catheter system of claim 11, wherein the engagement pod is recessed radially inward to form a stepped recess for axial abutment of the catheter to isolate the flow guide groove from the second delivery channel from the inlet channel.