Ablation device with biopsy function

Abstract

The utility model belongs to the field of human tissue biopsy and energy ablation, and provides an ablation device with a biopsy function, which is characterized by comprising a delivery outer tube, a delivery inner tube and a delivery outer tube, the conveying inner tube is movably inserted into the first channel of the conveying outer tube, and the first end of the conveying inner tube can extend out of the far end of the conveying outer tube; one end of the mesh basket electrode is fixedly connected with the first end of the conveying inner pipe, the mesh basket electrode is of an expandable structure, and by controlling relative movement between the conveying outer pipe and the conveying inner pipe, expansion or contraction of the mesh basket electrode is achieved, and the current state is maintained; the needle tube is provided with a third through channel and a needle tip, an ablation section is arranged at the position, close to the needle tip, of the needle tube, and the needle tube is movably arranged in the second channel of the conveying inner tube in a penetrating mode. By arranging the expandable mesh basket electrode and the needle tube, ablation treatment can be carried out on tumor tissues in and away from a cavity, operation is convenient, ablation efficiency is high, and equipment does not need to be replaced repeatedly.

Description

Technical Field

[0001] The utility model belongs to the field of human tissue biopsy and energy ablation, and particularly relates to an ablation device with a biopsy function. Background Art

[0002] Percutaneous biopsy is a common clinical diagnostic method, which is widely used for the diagnosis and differentiation of benign and malignant lung lesions. For example, before surgery, the lungs are scanned using CT or other imaging devices, and the optimal puncture point, puncture depth, and angle are determined based on the location and size of the lesion. For example, a transbronchial needle aspiration (TBNA) device is used to penetrate the tracheal wall, such as puncturing enlarged mediastinal lymph nodes, etc., and can directly clamp and obtain samples within the trachea under a microscope. For example, endobronchial ultrasound-guided transbronchial needle aspiration is commonly used for the diagnosis of lung lymph nodes or biopsy of lesion samples. Generally, after the endobronchial ultrasound reaches the target lesion location through natural channels such as the nasal cavity (or oral cavity), the ultrasound probe can detect the lesion location. When the sample is determined, a disposable aspiration biopsy needle is inserted to puncture the lesion location, and the sample can be collected. The pathologist can analyze the sample and output a diagnostic report and then perform corresponding ablation treatment.

[0003] With the rapid development of medical technology, there are more and more medical devices for ablation treatment, and the structures are becoming more and more diverse. The locations that usually need ablation treatment include natural cavities. For example, natural cavities include very important parts such as the nasal cavity, esophagus, trachea, digestive tract, ear canal, and oral cavity.

[0004] For example, common ablation methods when performing ablation treatment on the location to be ablated include pulsed electric field ablation technology and radiofrequency ablation technology, etc. Pulsed electric field (PEF) ablation technology is to apply an instantaneous high voltage to the target location and generate a local high-voltage electric field of several hundred volts per centimeter. The local high-voltage electric field is higher than the threshold, so that the structure of the part to be ablated can be destroyed, and this destruction is irreversible. Radiofrequency ablation technology mainly relies on a radiofrequency therapeutic instrument with ablation and cutting functions, and its treatment mechanism is mainly the thermal effect. When the radiofrequency current flows through the part to be ablated, the polar water molecules in the part to be ablated move at high speed due to the rapid change of the electromagnetic field, thereby destroying the structure of the part to be ablated to achieve the treatment purpose.

[0005] For example, when the tumor tissue is inside or near the lumen, only an ablation electrode needs to be configured inside the lumen to release an appropriate pulsed electric field for ablation treatment. When the diseased tissue is far from the lumen, ablation inside the lumen cannot remove the diseased tissue. The conventional practice in the prior art is usually to perform an external puncture. If both of the above two situations occur simultaneously, the existing ablation equipment has a single structure, cannot meet the needs of one-time puncture sampling biopsy and ablation, and is cumbersome to operate. The types of required equipment are limited, which is not conducive to the operator performing the operation and reduces the ablation efficiency and the patient's treatment experience. Summary of the Invention

[0006] The present invention provides an ablation device with a biopsy function, including:

[0007] A delivery outer tube having a distal end and a proximal end. The delivery outer tube is provided with a first channel that penetrates the distal end and the proximal end of the delivery outer tube;

[0008] A delivery inner tube having a first end and a second end. The delivery inner tube is provided with a second channel that penetrates the first end and the second end. The delivery inner tube is movably inserted into the first channel of the delivery outer tube, and the first end of the delivery inner tube can extend out of the distal end of the delivery outer tube;

[0009] A basket electrode that can be configured with ablation energy. One end of the basket electrode is fixedly connected to the first end of the delivery inner tube. The basket electrode is an expandable structure. By controlling the relative movement between the delivery outer tube and the delivery inner tube, the expansion or contraction of the basket electrode can be achieved and the current state can be maintained;

[0010] A syringe needle having a third channel that penetrates both ends of itself. The syringe needle is provided with a needle tip, and an ablation section is provided near the needle tip of the syringe needle. The ablation section of the syringe needle can be configured with ablation energy. The syringe needle is movably inserted into the second channel of the delivery inner tube.

[0011] In some embodiments, the first end of the delivery inner tube is located at the distal end of the delivery outer tube. One end of the basket electrode is connected to the first end of the delivery inner tube, and the other end of the basket electrode is connected to the distal end of the delivery outer tube.

[0012] In some embodiments, the basket electrode is made of a shape memory metal material. When the basket electrode is located in the first channel of the delivery outer tube, the basket electrode is in a contracted state. When the basket electrode completely extends out of the delivery outer tube, the basket electrode is in an expanded state.

[0013] In some embodiments, a preset taper is provided on the side of the basket electrode connected to the delivery inner tube.

[0014] In some embodiments, it is characterized in that it further includes a control handle, and the control handle includes a handle body, a first housing, and a second housing. The first housing is movably inserted through one end of the handle body, the second housing is movably inserted through the second end of the handle body, the proximal end of the outer conveying tube is connected to the first housing, the second end of the inner conveying tube is connected to the handle body, and the syringe is connected to the second housing.

[0015] In some embodiments, a fourth channel is provided on the first housing, and the fourth channel is adapted to one end of the handle body. The first housing can move relative to the handle body through the fourth channel.

[0016] In some embodiments, a first limiting structure is provided between the first housing and the handle body. The first limiting structure includes a first limiting boss provided on the inner wall of the first housing and a first limiting groove provided on the handle body, or a first limiting groove provided on the first housing and a first limiting boss provided on the handle body. Among them, the first limiting boss is clamped in the first limiting groove, and the first limiting groove is parallel to the axis of the handle body.

[0017] In some embodiments, a first locking knob is provided on the first housing, and one end of the first locking knob can abut against or disengage from the handle body.

[0018] In some embodiments, a first scale mark is provided on the handle body.

[0019] In some embodiments, a fifth channel is provided on the second housing, and the fifth channel is adapted to one end of the handle body. The second housing can move relative to the handle body through the fifth channel.

[0020] In some embodiments, a second limiting structure is provided between the second housing and the handle body. The second limiting structure includes a second limiting boss provided on the inner wall of the second housing and a second limiting groove provided on the handle body, or a second limiting groove provided on the second housing and a second limiting boss provided on the handle body. Among them, the second limiting boss is clamped in the second limiting groove, and the second limiting groove is parallel to the axis of the handle body.

[0021] In some embodiments, a second locking knob is provided on the second housing, and one end of the second locking knob can abut against or disengage from the handle body.

[0022] In some embodiments, a second scale mark is provided on the handle body.

[0023] In some embodiments, a limiting baffle is provided on the handle body, and the limiting baffle is located between the first housing and the second housing.

[0024] In some embodiments, a first connection assembly is further provided at one end of the first housing. The first connection assembly is provided with a through first through hole. The proximal end of the outer delivery tube passes through the first through hole and is connected to the first housing. The first connection assembly includes a first connection cap provided on the first housing, a first connection member detachably connected to the first connection cap, and a second connection cap detachably connected to the first connection member. The second connection cap can be connected to the endoscopic forceps port.

[0025] In some embodiments, a shrinkable structure is provided on the first connection member or the second connection cap. When the first connection member and the second connection cap are connected, the shrinkable structure shrinks and presses the outer delivery tube.

[0026] In some embodiments, a first connection hole is provided at one end of the second housing. A detachable negative pressure mechanism is provided on the first connection hole. The negative pressure mechanism can be communicated with the third channel of the needle tube.

[0027] In some embodiments, a first insulating layer is provided on the needle tube. Wherein, a part of the needle tube near the tip of the needle is exposed to form the ablation section.

[0028] In some embodiments, the inner delivery tube is made of a conductive material. Part or all of the ablation section of the needle tube is in contact with the inner wall of the inner delivery tube to transfer the ablation energy to the basket electrode.

[0029] In some embodiments, a cable assembly is further included. The cable assembly includes a needle core, a connector, and a power cord. The power cord is electrically connected to the needle core to achieve the transfer of ablation energy. The cable assembly is detachably arranged on the first connection hole of the second housing through the connector.

[0030] In some embodiments, a developing mark is provided on the ablation section of the needle tube.

[0031] Compared with the prior art, the beneficial effects brought by the present utility model are:

[0032] By providing an expandable basket electrode at the first end of the delivery inner tube, this application can achieve ablation of diseased tissues within the human body cavity and near the cavity. A movable syringe is provided in the second channel of the delivery inner tube, and an ablation section is provided on the syringe. The syringe is provided with a through third channel, which can achieve the treatment of diseased tissues farther away from the human body cavity. At the same time, the third channel provided on the syringe can be used for sampling biopsy. This application only needs to be inserted once to achieve ablation of diseased tissues at different positions, and can also perform sampling biopsy. The operation is simple, without the need for external puncture and repeated intubation, reducing the pain of the patient during the tube insertion process.

[0033] Additional aspects and advantages of this application will be given in part in the following description, which will become apparent from the following description, or will be understood through the practice of this application. Brief Description of the Drawings

[0034] Figure 1 Structural schematic diagram of an ablation device with a biopsy function according to the present utility model;

[0035] Figure 2 Schematic diagram of the first morphological structure of the basket electrode of an ablation device with a biopsy function according to the present utility model;

[0036] Figure 3 Schematic diagram of the second morphological structure of the basket electrode of an ablation device with a biopsy function according to the present utility model;

[0037] Figure 4 For Figure 2 Enlarged view at A in

[0038] Figure 5 For Figure 2 Enlarged view at B in

[0039] Figure 6 Assembly sectional view of the first connection assembly of an ablation device with a biopsy function according to the present utility model;

[0040] Figure 7 Schematic diagram of the syringe of an ablation device with a biopsy function according to the present utility model.

[0041] Figure 8 Schematic diagram of the connection structure between the delivery inner tube and the handle body of an ablation device with a biopsy function according to the present utility model;

[0042] Figure 9 Stereoscopic structural schematic diagram of the first housing of an ablation device with a biopsy function according to the present utility model;

[0043] Figure 10 Stereoscopic structural schematic diagram of the handle body of an ablation device with a biopsy function according to the present utility model;

[0044] Figure 11 Schematic perspective view of the second housing of an ablation device with a biopsy function according to the present utility model;

[0045] Figure 12 Schematic perspective view of the cable assembly of an ablation device with a biopsy function according to the present utility model;

[0046] Figure 13 Schematic perspective view of the negative pressure mechanism of an ablation device with a biopsy function according to the present utility model. Detailed implementation manners

[0047] The following further describes the present application in detail with reference to specific drawings. In the description of this embodiment, unless otherwise specified, the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the present application must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0048] As Figures 1-4 shown, an ablation device with a biopsy function provided by the present utility model mainly includes a delivery outer tube 2, a delivery inner tube 3, a basket electrode 5, and a needle tube 4.

[0049] Specifically, the delivery outer tube 2 has a distal end and a proximal end, and has a first channel 21. As Figure 1 shown in the direction, the left side is the distal end of the delivery outer tube 2, and the right side is the proximal end of the delivery outer tube 2. In this embodiment, the delivery outer tube 2 is made of an insulating material, and the delivery outer tube 2 has a certain guiding property and flexibility, so as to be able to deliver the ablation electrode 5 to the target position and at the same time adapt to the complex body cavities.

[0050] The delivery inner tube 3 has a first end and a second end. The delivery inner tube 3 is provided with a second passage 31 that penetrates the first end and the second end. The delivery inner tube 3 is movably inserted into the first channel 21 of the delivery outer tube 2, and the first end of the delivery inner tube 3 can extend out of the distal end of the delivery outer tube 2.

[0051] The basket electrode 5 is disposed at the first end of the delivery inner tube 3. As Figure 5 shown, the external ablation energy can be transmitted to the ablation electrode 5 to form a pulsed electric field. One end of the basket electrode 5 is fixedly connected to the delivery inner tube 3. Among them, the basket electrode 5 is a expandable structure. Specifically, by moving the delivery inner tube 3 relative to the delivery outer tube 2, the expansion and contraction of the basket electrode 5 can be realized, and after the basket electrode 5 is expanded, it can maintain the current state to ensure the close contact between the basket electrode 5 and the body cavity, thereby improving the ablation efficiency.

[0052] The syringe needle 4 is movably inserted through the second channel 31 of the delivery inner tube 3. As Figure 7 shown, the syringe needle 4 is provided with a needle tip 42. Among them, an ablation section 43 is provided at one end close to the needle tip 42. The ablation section 43 can be configured with ablation energy for ablation treatment. The syringe needle 4 is guided by the needle tip 42 for puncture, and can perform puncture ablation on the diseased tissue outside the human body cavity. It should be particularly noted that a third channel 41 is also provided on the syringe needle 4. The third channel 41 runs through both ends of the syringe needle 4. The third channel 41 is mainly used for sampling biopsy. The sampled cells pass through the third channel 41 to the outside of the human body, effectively avoiding the transfer of cancer cells to other healthy tissues of the human body through the needle track.

[0053] In this application, by providing an expandable basket electrode 5 and combining it with the syringe needle 4 with a third channel 41, at the same time, an ablation section 43 is provided on the syringe needle 4. According to the actual diseased position, the basket electrode 5 and the syringe needle 4 can be selected. At the same time, the syringe needle 4 can also perform sampling biopsy, truly realizing the multi-functional use of one tube, which can reduce the pain brought to the patient by direct external puncture and repeated intubation. At the same time, the whole process is simple to operate, without the need to repeatedly replace equipment, and has high practicability.

[0054] In one embodiment, the basket electrode 5 is a passive telescopic structure. One end of the basket electrode 5 is connected to the distal end of the delivery outer tube 2, and the other end of the basket electrode 5 is connected to the first end of the delivery inner tube 3. At this time, in the initial position, the first end of the delivery inner tube 3 extends out of the distal end of the delivery outer tube 2, and there is a preset distance between the first end of the delivery inner tube 3 and the distal end of the delivery outer tube 2. The preset distance is not less than the length of the basket electrode 5, so that the basket electrode 5 is in a contracted state. When the basket electrode 5 needs to be expanded, at this time, only the relative movement in the axial direction between the delivery outer tube 2 and the delivery inner tube 3 needs to be made, so that the first end of the delivery inner tube 3 approaches the distal end of the delivery outer tube 2, and the expansion of the basket electrode 5 can be realized to adapt to body cavities with different diameters in the human body.

[0055] Furthermore, since the basket electrode 5 is woven by multiple electrode wires, there are multiple wire heads at both ends of the basket electrode 5. For the convenience of gathering and fixing the basket electrode 5, connection rings are provided at both ends of the basket electrode 5. Welding or gluing can be used for fixing. One connection ring is heat-melt fixed to the distal end of the delivery outer tube 2, and the other connection ring is welded to the first end of the delivery inner tube 3. And a heat-shrinkable sleeve is also provided on the outer tube of the electrode wire for heat-melt fixing, making the connection structure between the delivery inner tube 3 and the basket electrode 5 more stable.

[0056] In one embodiment, as Figure 3As shown, the basket electrode 5 can also be a self-expanding structure made of a memory metal material, wherein one end of the basket electrode 5 of the self-expanding structure is fixedly connected to the first end of the inner delivery tube 3. Due to the characteristics of the memory metal material, when the basket electrode 5 is fully extended from the distal end of the outer delivery tube 2, the basket electrode 5 can self-expand and return to a preset shape, and according to the size of the diameter of the human body cavity, it can adaptively expand and abut against the inner wall of the human body cavity. When relative movement occurs between the outer delivery tube 2 and the inner delivery tube 3, the basket electrode 5 shrinks to a tubular structure and is received in the first channel 21 of the outer delivery tube 2 due to the squeezing force of the outer delivery tube 2.

[0057] Furthermore, in order to facilitate the storage of the self-expanding basket electrode 5, a preset taper is set on the side where the basket electrode 5 is connected to the inner delivery tube 3, so that the basket electrode 5 is subjected to less resistance when being stored, and it is more convenient to collapse the basket electrode 5. In this embodiment, the basket electrode 5 is divided into a contact section 52 and a tapered section 51, and one end of the non-tapered section 51 of the basket electrode 5 is an open structure, so that the basket electrode 5 can better perform self-expansion and expand, and has a higher fit with the human body cavity.

[0058] In one embodiment, a control handle 1 is also included. The control handle 1 includes a handle body 12, a first shell 11 and a second shell 13. The first shell 11 is movably inserted into one end of the handle body 12, and the second shell 13 is movably inserted into the other end of the handle body 12. The proximal end of the outer delivery tube 2 is connected to the first shell 11, and the second end of the inner delivery tube 3 is connected to the handle body 12. Specifically, the handle body 12 is provided with a second through hole 126 that passes through the handle body 12 for connecting and installing the inner delivery tube 3. One end of the needle tube 4 is connected to the second shell 13. When it is necessary to control the expansion or contraction of the basket electrode 5, the first shell 11 is controlled to move relative to the handle body 12, thereby driving the outer delivery tube 2 to move relative to the inner delivery tube 2. In this embodiment, the handle body 12 is stationary, and the first shell 11 drives the outer delivery tube 2 to move. When the first shell 11 is away from the handle body 12, if it is Figure 2 The basket electrode 5 is in an expanded state, and vice versa, the basket electrode 5 is in a contracted state. Figure 3 When the self-expandable basket electrode 5 is in the middle, the first shell 11 is in a contracted state when it is away from the handle body 12, and the basket electrode 5 is in an expanded state when the first shell 11 is close to the handle body 12.

[0059] Similarly, when the second shell 13 moves away from the handle body 12, the needle tip 42 of the needle tube 4 is slowly retracted into the second channel 31 of the transport inner tube 3; when the second shell 13 moves toward the handle body 12, the needle tip 42 of the needle tube 4 extends out of the second channel 31 of the transport inner tube 3, and the ablation section 43 located on the needle tube 4 extends out of the second channel 31.

[0060] In one embodiment, Figures 9-10As shown in the figure, a fourth channel 111 is provided on the first housing 11. The fourth channel 111 is adapted to the outer shape of one end of the handle body 12. The first housing 11 is movably arranged at one end of the handle body 12 through the fourth channel 111. In this embodiment, the fourth channel 111 is of a cylindrical structure, and one end of the handle body 12 is also of a cylindrical structure. The inner diameter of the fourth channel 111 should be greater than or equal to the outer diameter of one end of the handle body 12.

[0061] In one embodiment, a first limiting structure is provided between the first housing 11 and the handle body 12. The first limiting structure is to enable the first housing 11 to only move axially relative to the handle body 12 and not rotate in the radial direction, so as to avoid the rotation of the basket electrode 5 caused by improper operation and mechanical damage to the inner wall of the human body cavity. Specifically, the first limiting structure includes a first limiting boss 112 provided on the inner wall of the first housing 11 and a first limiting groove 121 provided on the handle body 12. The first limiting groove 121 and the first limiting boss 112 are adapted, and both the first limiting groove 121 and the first limiting boss 112 are arranged parallel to their own axial directions. The length of the first limiting groove 121 satisfies the two extreme positions of the first housing 11, that is, it can satisfy the complete expansion and complete contraction of the basket electrode 5. In this embodiment, the number of the first limiting grooves 121 is two, and the number of the first limiting bosses 112 matches it. It can be understood that the number and shape of the first limiting grooves 121 and the first limiting bosses 112 are not limited by the present utility model and will not be elaborated here.

[0062] As another variant embodiment in this embodiment, it is also possible to arrange the first limiting boss 112 on the handle body 12 and arrange the first limiting groove 121 on the inner wall of the first housing 11, which can also achieve the movement of the first housing 11 only along its own axis direction.

[0063] As another variant embodiment in this embodiment, it is also possible to arrange the fourth channel 111 and the handle body 12 into non-cylindrical structures. The interface of the handle body 12 can be an elliptical, triangular or rectangular structure, and the fourth channel 111 can be correspondingly arranged, which can also prevent the first housing 11 from rotating relative to the handle body 12.

[0064] Further, in order to limit the insertion depth and avoid damage caused by the forward and backward movement of the basket electrode 5 in the human body cavity due to improper operation, in this embodiment, a first locking knob 114 is provided on the first housing 11. One end of the first locking knob 114 can abut against or disengage from the surface of the handle body 12, so as to fix or move the first housing 11. Specifically, a first external thread is provided on the first locking knob 114, and a matching first internal thread 113 is provided on the handle housing. By rotating the first locking knob 114, one end of the first locking knob 114 abuts against or disengages from the handle body 12.

[0065] Further, to ensure a more accurate expansion state of the basket electrode 5, a first scale mark 122 is provided on the handle body 12. Specifically, the first scale mark 122 is composed of a plurality of scale lines, and numbers are corresponding to the scale lines. The expansion state of the basket electrode 5 is confirmed according to the size of the numbers. In this embodiment, when the basket electrode 5 is a structure with passive control of expansion or contraction, the first scale mark 122 mainly marks the expansion state of the basket electrode 5, so that the basket electrode 5 can more accurately match the inner diameter of the human body cavity and have a higher degree of fit with the human body cavity.

[0066] In one embodiment, as Figure 11 shown, a fifth channel 131 is provided on the second housing 13. The fifth channel 131 is adapted to one end of the handle body 12, and the second housing 13 is movably inserted through one end of the handle body 12 through the fifth channel 131. Specifically, the fifth channel 131 is a cylindrical structure, and the corresponding end of the handle body 12 is also a matching cylindrical structure. The inner diameter of the fifth channel 131 is not less than the outer diameter of one end of the handle body 12, that is, it can meet the interpenetrating movement between the two.

[0067] In one embodiment, a second limiting structure is provided between the second housing 13 and the handle body 12. The second limiting structure is mainly used for the second housing 13 to perform an axial linear movement relative to the handle body 12, avoiding the rotation of the second housing 13 relative to the handle body 12, further avoiding the rotation of the syringe needle 4 driven by the second housing 12, and reducing the damage to human tissues by the needle tip 42. Specifically, in this embodiment, the second limiting structure includes a second limiting boss 132 provided on the second housing 13 and a second limiting groove 125 provided on the handle body 12. The outer shapes of the second limiting groove 125 and the second limiting boss 132 are adapted to each other, and the second limiting boss 132 is clamped in the second limiting groove 125. Among them, both the second limiting groove 125 and the second limiting boss 132 are parallel to their own axial directions. The length of the second limiting groove 125 satisfies the two extreme positions of the ablation section 43 of the syringe needle 4, that is, the ablation section 43 of the syringe needle 4 is completely outside the delivery inner tube 3 or the ablation section 43 of the syringe needle 4 is completely in the second channel 31 of the delivery inner tube 3. In this embodiment, the number of both the second limiting boss 132 and the second limiting groove 125 is two. It can be understood that the shapes and numbers of the second limiting groove 125 and the second limiting boss 132 are not limited by the present utility model and will not be elaborated here too much.

[0068] As a variant implementation manner of this embodiment, it is also possible to set the first limiting boss 132 on the handle body 12 and set the first limiting groove 125 on the second housing 13, which can also achieve the movement of the second housing 13 only along its own axis direction.

[0069] As another variant implementation manner of this embodiment, it is also possible to set the part of the handle body 12 corresponding to the second housing into a non-cylindrical structure. For example, the cross-section of the handle body 12 can be triangular, rectangular or oval, etc., and the outer shape of the fifth channel 131 is matched with it. Similarly, the second housing 13 will not rotate relative to the handle body 12.

[0070] Furthermore, in order to limit the insertion depth and avoid the over-puncture or under-puncture of the needle tip 42 of the syringe needle 4 caused by improper operation, in this embodiment, a second locking knob 134 is provided on the second housing 13. One end of the second locking knob 134 can abut against or disengage from the surface of the handle body 12, so as to realize the fixation or movement of the second housing 13. Specifically, a second external thread is provided on the second locking knob 134, and a matching second internal thread 133 is provided on the handle housing 13. By rotating the second locking knob 134, one end of the second locking knob 134 abuts against or disengages from the handle body 12.

[0071] Further, to achieve a more precise puncture depth of the syringe 4 and avoid over-puncturing or under-puncturing, a second marking scale 124 is provided on the handle body 12. Specifically, the second scale marking 124 is composed of multiple scale lines, and numbers are corresponding to the scale lines. The depth of the tip 42 of the syringe penetrating into the tissue is confirmed according to the size of the numbers. In this embodiment, the larger the number, the greater the depth of the tip 42 penetrating into the tissue; conversely, the smaller the penetration depth.

[0072] In one embodiment, a limiting baffle 123 is provided on the handle body 12. The limiting baffle 123 is located between the first housing 11 and the second housing 13. By providing the limiting baffle 123, excessive movement of the first housing 11 or the second housing 13 relative to the handle body 12 is avoided. In this embodiment, both the first housing 11 and the second housing 13 can abut against the limiting baffle 123.

[0073] In one embodiment, as Figure 6 shown, one end of the first housing 11 is provided with a first connection assembly 14. The first connection assembly 14 is provided with a through first through hole. Among them, the delivery outer tube 2 passes through the first through hole and is fixedly connected to the first housing 11. Specifically, the first connection assembly 14 includes a first connection cap 141, a first connection member 142, and a second connection cap 143. The first connection cap 141 is provided on the first housing 11 and is fixedly connected to the first housing 11. The first connection member 142 is detachably arranged on the first connection cap 141. Specifically, a third internal thread is provided on the first connection cap 141, and a matching third external thread is provided on the first connection member 142. The two are detachably connected through screw thread cooperation. Further, the first connection cap 141 can also be directly connected to the magnetic navigation.

[0074] Further, the connection between the second connection cap 143 and the first connection member 142 is also a detachable connection. Specifically, a fourth internal thread is provided on the second connection cap 143, and a matching fourth external thread is provided on the first connection member 142. The two are detachably connected through screw thread cooperation.

[0075] In this embodiment, one end of the second connection cap 143 is snap-connected to the biopsy cap 1431 at the forceps port of the endoscope. A snap connection boss is provided on the second connection cap 143, and a snap connection groove is provided on the biopsy cap 1431 at the forceps port of the endoscope. The snap connection boss and the snap connection groove are adapted and the snap connection boss is snap-connected into the snap connection groove for the fixation of the biopsy and ablation device to the forceps port of the endoscope, eliminating the need for additional personnel to assist in holding the biopsy and ablation device and avoiding bending or breaking of the delivery outer tube 2, the delivery inner tube 3, and the syringe 4.

[0076] Further, it should be specifically noted that, to avoid the shaking of the delivery outer tube 2, a shrinkable structure is provided between the first connecting member 142 and the second connecting cap 143. When the second connecting cap 143 is fixed to the first connecting member 142, the shrinkable structure squeezes the delivery outer tube 2 to fix the delivery outer tube 2 and prevent it from shaking relative to the endoscope. Specifically, the shrinkable structure is a first pipe made of elastic rubber, which is an integral part of the second connecting cap 142 and is fixed by the cooperation of the fourth internal thread and the fourth external thread, and will squeeze the first pipe made of elastic rubber, thereby fixing the delivery outer tube 2. Optionally, the first pipe of the elastic rubber structure can also be a rigid structure. At this time, a plurality of shrinkage notches need to be provided on the side wall of the first pipe. By the cooperation of the fourth external thread and the fourth internal thread, the first pipe is squeezed. The existence of the shrinkage notches makes the inner wall of the first pipe abut against the delivery outer tube 2, thereby fixing the delivery outer tube 2.

[0077] In one embodiment, as Figure 13 shown, one end of the second housing 13 is provided with a first connection hole 135, and a detachable negative pressure mechanism 1352 is provided on the first connection hole 135. When the negative pressure mechanism 1352 is connected to the second housing 13 through the first connection hole 135, the negative pressure mechanism 1352 communicates with the third channel 41 of the needle tube. In this embodiment, the negative pressure mechanism 1352 is a syringe structure. Optionally, the negative pressure magnitude of the negative pressure mechanism 1352 can be adjusted according to actual needs to meet the requirement of extracting biopsy cells or tissues from the tip 42 out of the human body for pathological examination.

[0078] In one embodiment, a first insulating layer 44 is provided on the needle tube 4. Among them, only the end of the needle tube 4 close to the tip 42 is exposed to form an ablation section 43. Further, the delivery inner tube 3 is composed of a metal pipe fitting made of a conductive material. Among them, part or all of the ablation section 43 of the needle tube 4 is in contact with the delivery inner tube 3 to form an electrical connection, so as to realize the transmission of the delivery energy on the needle tube 4 to the basket electrode 5 on the delivery inner tube 3. In this embodiment, by making the delivery inner tube 3 composed of a conductive metal material and providing a first insulating layer 44 on the needle tube 4, only one ablation energy transmission channel is required. That is, when ablation of the needle tube 4 is required, at this time, the ablation section 43 of the needle tube 4 extends out of the first channel 31 of the delivery inner tube 3, and the first insulating layer 44 on the needle tube 4 insulates and isolates the needle tube 4 from the delivery inner tube 3. When only ablation of the basket electrode 5 is required, at this time, the ablation section 43 of the needle tube 4 is located in the second channel 31 of the delivery inner tube 3 and abuts against the inner wall of the second channel 31 to realize electrical connection between the two. Then, the energy of the needle tube 4 is transmitted to the basket electrode 5 for ablation by abutting of the basket electrode 5.

[0079] In one embodiment, as Figure 12As shown, it further includes a cable assembly 1351. The cable assembly 1351 includes a needle core 13511, a connector 13512, and a power cord 13513. The power cord 13513 is electrically connected to the needle core 13511 to achieve the transmission of ablation energy. Specifically, the connector 13512 is detachably connected to the first connection hole 135. The connector 13512 and the aforementioned negative pressure mechanism 1352 can share the first connection hole 135 to improve the adaptability of the second housing 12. When the connector 13512 is connected to the first connection hole 135, one end of the needle core 13511 is inserted into the third channel 41 of the needle tube 4. It can be understood that the outer diameter of the needle core 13511 should be adapted to the inner diameter of the third channel 41 of the needle tube 4 to ensure sufficient contact between the needle core 13511 and the needle tube 4, thereby ensuring the stability of ablation energy transmission. Optionally, the needle core 13511 is provided with a certain length to ensure sufficient contact between the needle core 13511 and the needle tube 4.

[0080] In one embodiment, the ablation section 43 of the needle tube 4 is provided with a visualization mark 45. The visualization mark 45 enables the operator to view the position of the needle tip 4 under CT, enabling the operator to perform visualization operations. In this embodiment, the visualization mark 45 is multiple laser dots on the surface of the needle tube. Optionally, the visualization mark 45 can also be a visualization ring made of a platinum-iridium ring or barium sulfate.

[0081] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made. These improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An ablation device with a biopsy function, characterized in that, Comprising: A delivery outer tube having a distal end and a proximal end, the delivery outer tube being provided with a first channel that penetrates through the distal end and the proximal end of the delivery outer tube; A delivery inner tube having a first end and a second end, the delivery inner tube being provided with a second channel that penetrates through the first end and the second end, the delivery inner tube being movably inserted into the first channel of the delivery outer tube, and the first end of the delivery inner tube being able to extend out of the distal end of the delivery outer tube; A basket electrode that can be configured with ablation energy, one end of which is fixedly connected to the first end of the delivery inner tube, the basket electrode being an expandable structure, and by controlling the relative movement between the delivery outer tube and the delivery inner tube, the expansion or contraction of the basket electrode can be achieved and the current state can be maintained; A needle tube having a third channel that penetrates through both ends of itself, the needle tube being provided with a needle tip, an ablation section being provided near the needle tip of the needle tube, the ablation section of the needle tube being able to be configured with ablation energy, and the needle tube being movably inserted into the second channel of the delivery inner tube.

2. The ablation device with a biopsy function according to claim 1, wherein The first end of the delivery inner tube is located at the distal end of the delivery outer tube, one end of the basket electrode is connected to the first end of the delivery inner tube, and the other end of the basket electrode is connected to the distal end of the delivery outer tube.

3. The ablation device with a biopsy function according to claim 1, wherein, The basket electrode is made of a shape memory metal material. When the basket electrode is located in the first channel of the delivery outer tube, the basket electrode is in a contracted state. When the basket electrode completely extends out of the delivery outer tube, the basket electrode is in an expanded state.

4. The ablation device with a biopsy function according to claim 3, wherein, A preset taper is provided on the side of the basket electrode connected to the delivery inner tube.

5. A ablation device with a biopsy function according to any one of claims 1-4, characterized in that, It further includes a control handle, the control handle comprising a handle body, a first housing, and a second housing. The first housing is movably inserted into one end of the handle body, the second housing is movably inserted into the second end of the handle body, the proximal end of the delivery outer tube is connected to the first housing, the second end of the delivery inner tube is connected to the handle body, and the needle tube is connected to the second housing.

6. The ablation device with a biopsy function according to claim 5, characterized in that, A fourth channel is provided on the first housing, the fourth channel being adapted to one end of the handle body, and the first housing can move relative to the handle body through the fourth channel.

7. The ablation device with a biopsy function according to claim 5, characterized in that, A first limiting structure is provided between the first housing and the handle body. The first limiting structure includes a first limiting boss provided on the inner wall of the first housing and a first limiting groove provided on the handle body, or a first limiting groove provided on the first housing and a first limiting boss provided on the handle body. Among them, the first limiting boss is snap-fitted into the first limiting groove, and the first limiting groove is parallel to the axis of the handle body.

8. The ablation device with a biopsy function according to claim 5, wherein, A first locking knob is provided on the first housing, and one end of the first locking knob can abut against or disengage from the handle body.

9. The ablation device with a biopsy function according to claim 8, characterized in that, A first scale mark is provided on the handle body.

10. The ablation device with a biopsy function according to claim 5, characterized in that, A fifth channel is provided on the second housing, the fifth channel being adapted to one end of the handle body, and the second housing can move relative to the handle body through the fifth channel.

11. An ablation device with a biopsy function according to claim 5, characterized in that, A second limiting structure is provided between the second housing and the handle body. The second limiting structure includes a second limiting boss disposed on the inner wall of the second housing and a second limiting groove disposed on the handle body, or a second limiting groove disposed on the second housing and a second limiting boss disposed on the handle body. Wherein, the second limiting boss is snap-fitted into the second limiting groove, and the second limiting groove is parallel to the axis of the handle body.

12. The ablation device with a biopsy function according to claim 5, characterized in that, A second locking knob is provided on the second housing, and one end of the second locking knob can abut against or disengage from the handle body.

13. The ablation device with a biopsy function according to claim 12, wherein, A second scale mark is provided on the handle body.

14. The ablation device with a biopsy function according to claim 5, characterized in that, A limiting baffle is provided on the handle body, and the limiting baffle is located between the first housing and the second housing.

15. An ablation device with a biopsy function according to claim 5, characterized in that, A first connection assembly is further provided at one end of the first housing. The first connection assembly is provided with a through first through hole. The proximal end of the delivery outer tube passes through the first through hole and is connected to the first housing. The first connection assembly includes a first connection cap disposed on the first housing, a first connector detachably connected to the first connection cap, and a second connection cap detachably connected to the first connector. The second connection cap can be connected to the endoscope forceps port.

16. The ablation device with a biopsy function according to claim 15, wherein A shrinkable structure is provided on the first connector or the second connection cap. When the first connector and the second connection cap are connected, the shrinkable structure shrinks and squeezes the delivery outer tube.

17. The ablation device with a biopsy function according to claim 5, characterized in that, A first connection hole is provided at one end of the second housing, and a detachable negative pressure mechanism is provided on the first connection hole. The negative pressure mechanism can be communicated with the third channel of the needle tube.

18. The ablation device with a biopsy function according to claim 17, characterized in that, A first insulating layer is provided on the needle tube. Wherein, a part of the needle tube near the needle tip is exposed to form the ablation section.

19. The ablation device with a biopsy function according to claim 18, characterized in that, The delivery inner tube is made of a conductive material, and part or all of the ablation section of the needle tube is in contact with the inner wall of the delivery inner tube to transfer the ablation energy to the basket electrode.

20. An ablation device with a biopsy function according to claim 19, characterized in that, It further includes a cable assembly. The cable assembly includes a needle core, a connector, and a power cord. The power cord is electrically connected to the needle core to achieve the transfer of ablation energy. The cable assembly is detachably disposed on the first connection hole of the second housing through the connector.

21. The ablation device with a biopsy function according to claim 1, characterized in that, A developing mark is provided on the ablation section of the needle tube.

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