Medical device
By designing an adjustable-length ablation device, the problem of inconsistent ablation catheter lengths was solved, enabling adaptive matching of the same ablation device in different scenarios, reducing costs and improving convenience.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHANGHAI SHUNENG MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-01-21
- Publication Date
- 2026-07-23
Smart Images
Figure CN2025073624_23072026_PF_FP_ABST
Abstract
Description
A medical device Technical Field
[0001] This invention belongs to the field of medical device ablation technology, and specifically refers to a medical device. Background Technology
[0002] With the continuous advancement of technology, pulsed ablation surgery is increasingly being used in minimally invasive surgeries to ablate and remove tumor cells. Locations typically requiring ablation include natural cavities. These include vital areas such as the nasal cavity, esophagus, trachea, digestive tract, ear canal, and oral cavity. As medical technology rapidly develops, the number and structural diversity of medical devices used for ablation therapy are also increasing.
[0003] Existing ablation medical devices require the use of endoscopes or robotic access points during ablation procedures. The length of the endoscopic tubing varies depending on the ablation scenario, and the required length of the ablation catheter also differs. For example, current ablation procedures require different lengths of ablation tubing for the digestive tract and airway. Current surgical methods utilize ablation devices with two different lengths of ablation tubing, increasing the cost of ablation equipment for hospitals and making it impossible to adaptively match different endoscopes or robotic access points according to the specific surgical needs. Therefore, it is necessary for those skilled in the art to solve these technical problems. Summary of the Invention
[0004] This invention provides a medical device that solves the problem in the above-mentioned technical background that the length of ablation catheter required for different parts of the body is inconsistent, and the catheter cannot be adaptively matched to the length of the endoscope or robot channel required for the current surgery, resulting in increased medical device costs and inconvenience in hospital use.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A medical device comprising:
[0007] The first fixed rod has a through first channel;
[0008] The second fixing rod has a through second channel;
[0009] The first housing has a first cavity. The first housing is sleeved on one end of the first fixing rod. The first housing can move relatively linearly along the axis of the first fixing rod.
[0010] The second housing has a second cavity. The second housing is sleeved on one end of the second fixing rod. The second housing can move relatively linearly along the axis of the second fixing rod.
[0011] The first fixing rod and the second fixing rod are detachably connected, and a first fixing component is provided at the connection between the first fixing rod and the second fixing rod. The first fixing component is provided with a retractable first locking channel.
[0012] The outer sheath tube has a through third channel. The outer sheath tube is located at one end of the second housing. One end of the outer sheath tube passes through the first locking channel and is connected to the first fixing rod.
[0013] The medical consumable has a slender structure and is movably inserted into the third channel of the outer sheath. The medical consumable has a distal end and a proximal end, and the distal end of the medical consumable can extend out or be stored in the outer sheath.
[0014] In some embodiments, the first fixing component includes a first locking knob, an elastic fixing member, and a first top block. The first locking channel is disposed on the elastic fixing member, the first locking knob has a through first mounting channel, the elastic fixing member is disposed in the first mounting channel, and the first top block is disposed on the second fixing rod.
[0015] The first locking knob is provided with a first external thread, and the second fixing rod is provided with a corresponding first internal thread. When the first locking knob is screwed on, the first top block presses against the elastic fixing member to reduce the inner diameter of the first locking channel.
[0016] In some embodiments, the second fixing rod is provided with a second external thread, and the first fixing rod is provided with a matching second internal thread, wherein the inner diameter of the second internal thread is larger than the outer diameter of the first locking knob.
[0017] In some embodiments, a first limiting component is also provided at the connection between the first fixed rod and the second fixed rod. The first limiting component includes a first limiting base provided on the first fixed rod, a first cover plate detachably connected to the first limiting base, and a first adjusting button. A third cavity is provided between the first limiting base and the first cover plate, and a portion of the first adjusting button is movably disposed in the third cavity.
[0018] The first adjustment button and the second fixing rod are provided with a second limiting structure that cooperates with each other. The second limiting structure includes a second limiting post on the first adjustment button and a second limiting hole on the second fixing rod, or a second limiting hole on the first adjustment button and a second limiting post on the second fixing rod. The second limiting post can be inserted into or removed from the second limiting hole.
[0019] In some embodiments, the first adjustment button is provided with a first abutting surface, and the first limiting base is provided with a second abutting surface. The first abutting surface abuts against the second abutting surface, wherein the moving direction of the second abutting surface relative to the first abutting surface is consistent with the moving direction of the second limiting post relative to the second limiting hole.
[0020] In some embodiments, the first adjustment button is provided with a first limiting boss, the first limiting base is provided with a first limiting groove and / or the first cover plate is provided with a first limiting groove;
[0021] Alternatively, the first adjustment button may be provided with a first limiting groove, the first limiting base may be provided with a first limiting boss, and / or the first cover plate may be provided with a first limiting boss;
[0022] Wherein, the first limiting groove is adapted to the first limiting boss, the first limiting boss is inserted into the first limiting groove, the moving direction of the first limiting boss relative to the first limiting groove is consistent with the moving direction of the second limiting post relative to the second limiting hole, and the length of the first limiting groove is not less than the moving distance of the non-fixed end of the second limiting post.
[0023] In some embodiments, a reset spring pin is provided between the first limiting base and the first adjustment button. The fixed end of the reset spring pin is disposed on the first limiting base, and the free end of the reset spring pin abuts against the first adjustment button.
[0024] In some embodiments, one end of the second housing is provided with a head end rotating member, which is rotatably disposed at the end of the second housing away from the second fixed rod. The head end rotating member is provided with a first guide tube, which is adapted to the second channel of the second fixed rod. The first guide tube is movably inserted into the second channel and can rotate relative to the first fixed rod.
[0025] In some embodiments, a clamp channel retainer is further included on the head end rotating member. The clamp channel retainer is detachably mounted on the head end rotating member. The clamp channel retainer includes an endoscope clip adapted to the endoscope clamp channel opening, a first rotating member, and an elastic seal. The elastic seal has a first fixing channel and is disposed within the first rotating member. The first rotating member and the endoscope clip are threaded together. When the first rotating member is tightened, the endoscope clamp channel opening squeezes the elastic seal, thereby contracting the first fixing channel to lock and fix the stress tube sleeved on the outer sheath.
[0026] In some embodiments, the medical consumable is an aspiration needle tube with a puncture tip at one end and the other end of the aspiration needle tube connected to the first housing. The aspiration needle tube has a first aspiration channel that extends through itself.
[0027] In some embodiments, one end of the needle core is provided with a needle cap, the needle cap is detachably connected to the first housing, the needle core is movably inserted into the first suction channel, and the other end of the needle core does not protrude from the puncture tip of the suction needle tube.
[0028] In some embodiments, the negative pressure device is detachably connected to the first housing and communicates with the first suction channel.
[0029] In some embodiments, the medical consumable is a first push rod with a rod-like structure, the proximal end of the first push rod being connected to the first housing, and the distal end of the first push rod being provided with an ablation electrode, which can be configured with ablation energy.
[0030] In some embodiments, the first push rod and the ablation electrode are integrally formed of a conductive metallic material, and the first push rod is provided with a first insulating layer, wherein the distal portion of the first push rod is exposed to form the ablation electrode.
[0031] In some embodiments, the ablation electrode has a puncture needle tip, wherein the first push rod has a through fourth channel that penetrates the ablation electrode to form a first needle tube, and the fourth channel can be used to communicate with a negative pressure device or to insert an electrode needle.
[0032] Compared with the prior art, the beneficial effects of this invention are:
[0033] This application detachably connects the first fixing rod and the second fixing rod, and sets a first fixing component at the connection between the first fixing rod and the second fixing rod. The first fixing component has a retractable first locking channel. One end of the outer sheath passes through the first locking channel and is connected to the first fixing rod. The outer sheath can be locked by the first fixing component, thereby realizing the adjustment of the length of the end of the outer sheath away from the second shell to adapt to the length of the outer sheath required for different surgical scenarios. It adaptively matches the tube length of the endoscope or robot channel currently used, realizing the application of the same ablation device in different scenarios.
[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description
[0035] Figure 1 is a schematic diagram of the overall structure of a medical device according to the present invention;
[0036] Figure 2 is a schematic diagram of the structure of the outer sheath of a medical device according to the present invention in an adjusted state;
[0037] Figure 3 is an enlarged view of point A in Figure 1;
[0038] Figure 4 is a cross-sectional view of the assembly structure of the first housing and the second housing of a medical device according to the present invention.
[0039] Figure 5 is a cross-sectional view of the internal structure of the first fixing rod of a medical device according to the present invention.
[0040] Figure 6 is a cross-sectional view of the head end rotating component of a medical device according to the present invention;
[0041] Figure 7 is an exploded view of the assembly structure of the first fixing rod and the second fixing rod of the present invention;
[0042] Figure 8 is a three-dimensional structural diagram of the second fixing rod of the present invention;
[0043] Figure 9 is a three-dimensional structural diagram of the first cover plate of the present invention;
[0044] Figure 10 is a three-dimensional structural diagram of the first adjustment button of the present invention;
[0045] Figure 11 is an enlarged view of section B in Figure 4;
[0046] Figure 12 is a perspective view of the clamp fixator of the present invention;
[0047] Figure 13 is a cross-sectional view of the clamp fixator of the present invention;
[0048] Figure 14 is a schematic diagram of the structure of the clamp fixator of the present invention assembled on the endoscope;
[0049] Figure 15 is a schematic diagram of the structure of the first limiting base of the present invention;
[0050] Figure 16 is a structural schematic diagram of the needle core of the present invention and an assembly diagram of the needle core;
[0051] Figure 17 is a schematic diagram of the ablation device of the present invention when used for biopsy sampling;
[0052] Figure 18 is a schematic diagram of the handle structure of the present invention used only for biopsy.
[0053] Figure 19 is a schematic diagram of the handle structure of the present invention used only for ablation;
[0054] Figure 20 is a schematic diagram of the structure of the ablation electrode of the present invention;
[0055] Figure 21 is a schematic diagram of the split structure of the ablation device of the present invention for needle ablation when the outer sheath is adjusted over a large range.
[0056] Figure 22 is another structural schematic diagram of the energy transmission path of the present invention;
[0057] Figure 23 is a cross-sectional view of the internal structure in Figure 19;
[0058] Figure 24 is a schematic diagram of the connection between the first fixing rod and the second fixing rod of the present invention.
[0059] Figure 25 is a cross-sectional view of the second housing of the present invention;
[0060] Figure 26 is a schematic diagram of the assembly structure of the flange sleeve of the present invention;
[0061] Figure 27 is a schematic diagram of the overall device of the present invention applied to a robot channel;
[0062] Figure 28 is an enlarged view of point G in Figure 18;
[0063] Figure 29 is an enlarged view of section H in Figure 19.
[0064] Explanation of reference numerals in the attached drawings: Second housing 100, suction needle tube 1001, first suction channel 1002, puncture tip 1003, needle core 1004, needle cap 1005, second locking screw 101, head end rotating component 102, first guide tube 1021, first rotating component 1022, first fixing sleeve 10221, endoscope buckle 1023, elastic seal 1024, endoscope forceps orifice 1025, upper housing 103, lower housing 104, second fixing rod 200, first push rod 2001, second channel 201, second limiting hole 202, second external thread 203, first internal thread 204, second annular boss 205, first fixing rod 300, first channel 301, first fixing sleeve 302, third locking knob 3021, first elastic buckle 3022, first slot 3023, fifth channel 3024, first limiting base 30 31, Second internal thread 30311, Reset spring pin 30312, Second abutment surface 30313, First fixing post 30314, First adjusting button 3032, Second limiting post 30321, First limiting boss 30322, First abutment surface 30323, First cover plate 3033, First limiting groove 30331, First fixing hole 30332, First top block 3035, First locking knob 3041, Elastic fixation The components include: a fixed part 3042, a first housing 400, a first locking screw 401, a two-way valve 402, a syringe 403, an electrode needle 404, a first non-metallic insulating part 4051, a first metallic conductive part 4052, a first wire 406, a first retaining ring 407, an outer sheath 500, a flanged sleeve 501, a first needle tube 600, a first insulating layer 601, an ablation electrode 602, a contrast groove 6021, and a first fixing assembly 700. Detailed Implementation
[0065] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the embodiments, unless otherwise stated, the terms "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the present application must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.
[0066] As shown in Figures 1 and 2, a medical device provided by the present invention mainly includes a first fixing rod 300, a second fixing rod 200, a first housing 400, a second housing 100, an outer sheath 500, a first needle tube 600, and a first fixing component 700.
[0067] The first fixing rod 300 is provided with a first channel 301 that passes through itself, as shown in Figures 18 and 19; the second fixing rod 200 is provided with a second channel 201 that passes through both ends of itself.
[0068] The first housing 400 has a first cavity and is sleeved on one end of the first fixing rod 300. The first housing 400 can move linearly relative to the axis of the first fixing rod 300, allowing for fine adjustment of the insertion depth of the ablation electrode 602. The second housing 100 has a second cavity and is sleeved on one end of the second fixing rod 200. The second housing 100 can move linearly relative to the axis of the second fixing rod 200, allowing for fine adjustment of the length of the outer sheath 500. In this embodiment, for ease of assembly, both the first housing 400 and the second housing 100 are detachable assembly structures. As shown in Figure 25, which is a cross-sectional view of the second housing 100, the second housing 100 includes an upper housing 103 and a lower housing 104. The upper housing 103 and the lower housing 104 are fixedly connected by a pin structure with a hole and shaft, or by a snap-fit connection.
[0069] Specifically, the first housing 400 is provided with multiple first limiting ribs that are adapted to the shape of the first fixing rod 300. Simultaneously, a second limiting rib is provided within the first housing 400, and a matching first limiting groove is provided on the first fixing rod 300. The length direction of the second limiting rib is parallel to the axial direction of the first fixing rod 300, thereby ensuring a compact structure between the first fixing rod 300 and the first housing 400, and allowing only linear movement of the first housing 400 along the first fixing rod 300. Similarly, the assembly structure and principle between the second housing 100 and the second fixing rod 200 are the same as those between the first fixing rod 300 and the first housing 400, and will not be elaborated further here.
[0070] The medical consumable has a slender structure and is movably inserted into the third channel of the outer sheath tube 500. The medical consumable has a distal end and a proximal end. The proximal end of the medical consumable extends out of the outer sheath tube 500 and connects to the first housing 400. The distal end of the medical consumable can extend out or be stored in the third channel of the outer sheath tube 500. By moving the first housing 400 relative to the first fixing rod 300, the position adjustment of the distal end of the medical consumable relative to the outer sheath tube 500 can be achieved.
[0071] The outer sheath tube 500 is provided with a third channel that passes through both ends of itself. The outer sheath tube 500 is located at the end of the second housing 100 away from the second fixing rod 200. One end of the outer sheath tube 500 passes through the second cavity of the second housing 100 and the first channel 301 of the first fixing rod 300 and is connected to the first fixing rod 300.
[0072] The first fixing rod 300 and the second fixing rod 200 are detachably connected. A first fixing component 700 is provided at the connection between the first fixing rod 300 and the second fixing rod 200. The first fixing component 700 has a retractable first locking channel. The outer sheath tube 500 passes through the first locking channel of the first fixing component 700. When the first locking channel is in the normal state, the outer sheath tube 500 can move relative to the first fixing component 700, thereby adjusting the length of the outer sheath tube 500. After the length of the outer sheath tube 500 is adjusted, the inner diameter of the first locking channel is adjusted to fix the outer sheath tube 500, so that the length of the outer sheath tube 500 currently entering the endoscope matches the length of the tube of the endoscope or robot. When making adjustments over a longer period of time, two people need to work together. One operator locks one end of the second housing 100 to the endoscope forceps port 1025, while the other operator adjusts the insertion and removal of the outer sheath 500. The length of the outer sheath 500 is adjusted according to actual needs. When the adjustment is complete, the first locking knob 3041 is locked.
[0073] In this embodiment, by providing a first fixing component 700 with a retractable first locking channel, the length of the outer sheath 500 can be adjusted over a wide range, for example, the length of the outer sheath 500 can be adjusted between 900mm and 1600mm. When the first fixing rod 300 and the second fixing rod 200 are connected, the surgical length of the outer sheath 500 is at its maximum.
[0074] Further, as shown in Figures 7 and 11, the first fixing component 700 includes a first locking knob 3041, a first top block 3035, and an elastic fixing member 3042. The elastic fixing member 3042 is sleeved on the outer sheath tube 500, the first top block 3035 is disposed on the second fixing rod 200, the first locking channel is disposed on the elastic fixing member 3042, the first locking knob 3041 is provided with a first installation channel, and the elastic fixing member 3042 is disposed in the first installation channel. The first locking knob 3041 is provided with a first external thread, and the second channel 201 of the second fixing rod 200 is provided with a first internal thread 204, as shown in Figure 8. When the first locking knob 3041 is locked in place by the first external thread and the first internal thread 204, the first top block 3035 presses the elastic fixing member 3042, thereby causing the first locking channel of the elastic fixing member 3042 to contract, thereby pressing the outer sheath tube 500, thereby fixing the position of the outer sheath tube 500 relative to the first locking knob 3041.
[0075] Specifically, in this embodiment, the elastic fastener 3042 is a cylindrical rubber component capable of elastic deformation. Optionally, the elastic fastener 3042 can be a metal spring structure capable of elastic deformation. In this embodiment, the first locking knob 3041 of the first external thread section can be an elastic structure, thereby compressing the elastic fastener when locking. Optionally, multiple slots coplanar with the axial direction of the first locking knob 3041 can be provided in the portion with the first external thread section, and the first external thread section has a frustum structure, thereby enabling the first locking knob 3041 to compress the elastic fastener 3042 when locking, thus fixing the outer sheath 500.
[0076] In one embodiment, as shown in Figures 19 and 29, the medical consumable is an aspiration needle 1001, one end of which is provided with a puncture tip 1003. The aspiration needle 1001 is movably inserted into the third channel of the outer sheath 500, and the other end of the aspiration needle 1001 extends out of the outer sheath 500 and is connected to the first housing 400. The aspiration needle 1001 is provided with a first aspiration channel 1002 that extends through itself. The first aspiration channel 1002 is used to connect to a negative pressure device for tissue biopsy extraction, as shown in Figures 16-17. In this embodiment, the needle core 1004 is first inserted into the first aspiration channel 1002, and then the needle cap 1005 is rotated and fixed on the first housing 400. The needle core 1004 supports the aspiration needle tube 1001 and provides puncture force. After the puncture tip 1003 of the aspiration needle tube 1001 is delivered to the target position, the needle core 1004 is removed. A negative pressure device is connected to one end of the first housing 400, and the valve of the two-way valve 402 is opened to connect the negative pressure device with the first aspiration channel 1002. By repeatedly moving the first housing 400 relative to the first fixed rod 300, the puncture tip 1003 of the aspiration needle tube 1001 is repeatedly moved to achieve tissue collection. Then, the negative pressure device provides negative pressure to extract the sample tissue. In this embodiment, the negative pressure device is a syringe 403.
[0077] In one embodiment, as shown in Figures 18 and 28, the medical consumable is a rod-shaped first push rod 2001, which is movably inserted into the third channel of the outer sheath 500. One end of the first push rod 2001 is connected to the first housing 400, and the other end of the first push rod 2001 is provided with an ablation electrode 602. The ablation electrode 602 can be configured with ablation energy to achieve ablation. In this embodiment, by setting the first push rod 2001 and the ablation electrode 602, ablation operation can be achieved independently. In this example, the ablation electrode 602 is provided with a puncture structure. After determining the location of the lesion, the ablation electrode 602 is punctured at the lesion location by pushing the first housing 400. After confirming that the ablation electrode 602 has reached the expected position using imaging facilities such as CT, the electrode end 404 is connected to the Luer of the first housing 400, and the other end is connected to an energy generator, and then energy is output to achieve ablation of the lesion. The surface of the ablation electrode 602 should have ultrasound imaging features.
[0078] In this embodiment, the ablation electrode 602 can be a woven basket structure or a columnar structure with a diameter similar to that of the first push rod 2001. The first push rod 2001 can be made of metal material to directly conduct electricity for ablation energy transfer, or a wire can be embedded in the first push rod 2001 to connect the ablation electrode 602 to an external energy generator.
[0079] Furthermore, the first push rod 2001 and the ablation electrode 602 are integrally formed from a conductive metallic material, such as stainless steel or nickel-titanium alloy. A fourth through-channel is provided on the first push rod 2001, penetrating the ablation electrode 602 to form a first needle tube 600, as shown in Figure 3. A first insulating layer 601 is provided on the first needle tube 600, and the distal end of the first needle tube 600 is exposed to form the ablation electrode 602. The ablation electrode 602 is provided with a puncture needle tip, and external ablation energy is transferred to the ablation electrode 602 through the first needle tube 600, thereby realizing the delivery of ablation energy. In this embodiment, the fourth channel can be used to connect to a negative pressure device for biopsy aspiration. ， Alternatively, an electrode needle 404 can be inserted into the fourth channel to meet the surgical needs of biopsy or ablation. When the fourth channel is connected to a negative pressure device, in this embodiment, the negative pressure device is a syringe 403. Sample aspiration and biopsy are then performed. As shown in Figure 17, a detachable syringe 403 is mounted on a Luer connector 405 at one end of the first housing 400. The syringe 403 is mounted on the first housing 400 via a two-way valve 402. The biopsy preparation is as described above and will not be elaborated further here. When the biopsy tissue is confirmed to be tumor tissue, an electrode needle 404 is inserted into the fourth channel. The specific operating steps are as described above, and ablation of the lesion tissue is performed. In this embodiment, the device can satisfy both ablation and biopsy operations without requiring repeated intubation of the patient, reducing patient discomfort.
[0080] Furthermore, to confirm the specific location of the ablation electrode 602, as shown in Figure 20, a contrast groove 6021 is provided on the surface of the ablation electrode 602. Combined with an ultrasonic instrument, the location of the ablation electrode 602 can be confirmed. In this embodiment, the contrast groove 6021 is an annular groove; alternatively, the contrast groove 6021 can be a dot-shaped groove.
[0081] In one embodiment, to facilitate the detachable connection between the first fixing rod 300 and the second fixing rod 200, a second external thread 203 is provided on the second fixing rod 200, and a matching second internal thread 30311 is provided on the first fixing rod 300. The inner diameter of the second internal thread 30311 is larger than the outer diameter of the first locking knob 3041, so that the first locking knob 3041 can be disengaged from the first channel 301 of the first fixing rod 300.
[0082] Optionally, the first fixing rod 300 and the second fixing rod 200 can also be connected by a snap-fit structure, as shown in Figure 24. In this embodiment, a plurality of first annular grooves 305 are provided at one end of the first fixing rod 300, and a plurality of matching second annular protrusions 205 are provided at one end of the second fixing rod 200. When the first fixing rod 300 and the second fixing rod 200 are connected, the second annular protrusions 205 are snapped into the first annular grooves 305.
[0083] In one embodiment, to prevent loosening of the threaded fit between the first fixing rod 300 and the second fixing rod 200, a first limiting component is further provided at the connection between the first fixing rod 300 and the second fixing rod 200. The first limiting component is mainly used to prevent the first fixing rod 300 from rotating relative to the second fixing rod 200. Specifically, the first limiting component includes a first limiting base 3031 provided on the first fixing rod 300, a first cover plate 3033 detachably connected to the first limiting base 3031, and a first adjusting button 3032. A third cavity is provided between the first limiting base 3031 and the first cover plate 3033, and part of the first adjusting button 3032 is movably disposed in the third cavity.
[0084] A second limiting structure, as shown in Figure 10, is provided between the first adjusting button 3032 and the second fixed rod 200. This second limiting structure includes a second limiting post 30321 on the first adjusting button 3032 and a second limiting hole 202 on the second fixed rod 200, or a second limiting hole 202 on the first adjusting button 3032 and a second limiting post 30321 on the second fixed rod 200. The second limiting post 30321 can be inserted into or removed from the second limiting hole 202. The moving direction of the first adjusting button 3032 is consistent with the axial direction of the second limiting post 30321, so that when the first adjusting button 3032 is pushed, the second limiting post 30321 can disengage from the second limiting hole 202. After the second limiting post 30321 disengages from the second limiting hole 202, the first fixed rod 300 and the second fixed rod 200 can rotate relative to each other.
[0085] In one embodiment, as shown in Figures 10 and 15, to ensure that the axes of the first adjustment button 3032 and the second limiting post 30321 are aligned, the structure of the first adjustment button 3032 between the first limiting base 3031 and the first cover plate 3033 is more compact and stable. A first abutting surface 30323 is provided on the first adjustment button 3032, and a second abutting surface 30313 is provided on the first limiting base 3031. The first abutting surface 30323 and the second abutting surface 30313 abut against each other. Both the first abutting surface 30323 and the second abutting surface 30313 are planar structures, and the direction of movement of the first abutting surface 30323 relative to the second abutting surface 30313 is consistent with the direction of movement of the second limiting post 30321 relative to the second limiting hole 202.
[0086] Further, as shown in Figures 9, 10, and 15, a first limiting boss 30322 is provided on the first adjustment button 3032, and a first limiting groove 30331 is provided on both the first limiting base 3031 and the first cover plate 3033. The first limiting boss 30322 is inserted into the first limiting groove 30331. The moving direction of the first limiting boss 30322 relative to the first limiting groove 30331 is consistent with the axial direction of the second limiting post 30321, and the length of the first limiting groove 30331 is not less than the moving distance of the non-fixed end of the second limiting post 30321, which is the end of the second limiting post 30321 that is disengaged from the second limiting hole 202. In this embodiment, the first adjustment button 3032 has planar abutment contact with both the first limiting base 3031 and the first cover plate 3033.
[0087] Optionally, the first limiting groove 30331 may be provided only on the first limiting base 3031 or the first cover plate 3033. Optionally, the first limiting groove 30331 may be provided on the first adjusting button 3032, and the first limiting boss 30322 may be provided on the first limiting base 3031 and the first cover plate 3033, or the first limiting boss 30322 may be provided only on the first limiting base 3031, or the first limiting boss 30322 may be provided only on the first cover plate 3033.
[0088] Furthermore, the first cover plate 3033 and the first limiting base 3031 are positioned by a hole-shaft fit, as shown in Figures 9 and 15. A first fixing post 30314 is provided on the first limiting base 3031, and a corresponding first fixing hole 30332 is provided on the first cover plate 3033. The first fixing post 30314 is inserted into the first fixing hole 30332 to facilitate the assembly of the first adjusting button 3032. The axial direction of the hole-shaft fit structure is consistent with the axial direction of the first fixing rod 300 and the second fixing rod 200. Optionally, the first cover plate 3033 and the first limiting base 3031 can also be connected by a snap-fit mechanism.
[0089] In one embodiment, to facilitate the automatic reset of the first adjustment button 3032, a reset spring pin 30312 is provided on the first limiting base 3031. The fixed end of the reset spring pin 30312 is fixed to the first limiting base 3031, and the free end of the reset spring pin 30312 abuts against the first adjustment button 3032. Specifically, the direction of movement of the free end of the reset spring pin 30312 is consistent with the axial direction of the second limiting post 30321. When the first adjustment button 3032 drives the second limiting post 30321 to disengage from the second limiting hole 202, the reset spring pin 30312 is in a compressed state. When the external force on the first adjustment button 3032 is removed, the free end of the reset spring pin 30312 resets, driving the first adjustment button 3032 back to its initial position.
[0090] Optionally, the reset pin 30312 may also be a spring structure, a spring sheet structure, or a rubber body that can undergo elastic deformation.
[0091] In one embodiment, to facilitate control of the axial linear movement distance of the first housing 400 relative to the first fixed rod 300 and to determine the needle insertion depth, a first retaining ring 407 is provided at one end of the first housing 400. The first retaining ring 407 is movably sleeved on the first fixed rod 300 and is detachably connected to the first housing 400. The first retaining ring 407 is provided with a first threaded hole, and a first locking screw 401 is provided in the first threaded hole. By rotating the first locking screw 401, one end of the first locking screw 401 located inside the first housing 400 can abut against or disengage from the first fixed rod 300, thereby presetting the needle insertion depth. This satisfies the requirement that during biopsy, the reciprocating movement of the first housing 400 along the axial direction of the first fixed rod 300 drives the first needle tube 600 to perform biopsy puncture and sampling. Furthermore, the first needle tube 600 will not move beyond its travel range, avoiding damage to human tissue caused by the ablation electrode 602.
[0092] In this embodiment, the first housing 400 and the first retaining ring 407 are detachably connected by a snap-fit or a boss-and-groove engagement mechanism.
[0093] Furthermore, since the contact end between the first locking screw 401 and the first fixing rod 300 is a planar structure, a planar structure is provided at the position corresponding to the first fixing rod 300 to increase the contact area between the two and make their relative fixing structure more stable.
[0094] Similarly, the second housing 100 is provided with a second threaded hole, and a second locking screw 101 is provided in the second threaded hole. One end of the second locking screw 101 can abut against the second fixing rod 200. The first locking screw 401 and the second locking screw 101 have the same structure and principle, and will not be described in detail here.
[0095] In one embodiment, to facilitate the assembly and fixation of the outer sheath 500, a first fixing sleeve 302 is provided on the first fixing rod 300, as shown in Figure 5. The first fixing sleeve 302 has a fifth channel 3024, which is used for the insertion of the first needle tube 600, the aspiration needle tube 1001, or the first push rod 2001, and is connected to the first housing 400. The first fixing sleeve 302 is detachably disposed in the first channel 301 of the first fixing rod 300. In this embodiment, a first slot 3023 is provided on the first fixing rod 300. A matching first elastic buckle 3022 is provided on the first fixing sleeve 302. The first fixing sleeve 302 is fixed by engaging with the first slot 3023. Optionally, the first elastic buckle 3022 can also be disposed on the first fixing rod 300, and the first slot 3023 can be disposed on the first fixing sleeve 302.
[0096] A third threaded hole is provided at one end of the first fixed sleeve 302, and a matching third locking knob 3021 is provided on the third threaded hole, as shown in Figure 26. A flange sleeve 501 is provided at one end of the outer sheath tube 500. The diameter of the flange sleeve 501 is greater than the diameter of the fifth channel 3024 and less than or equal to the diameter of the third threaded hole. By locking the third locking knob 3021, the flange sleeve 501 is pressed and fixed on the first fixed sleeve 302.
[0097] Alternatively, the other end of the first fixing sleeve 302 can be configured as a tapered structure, and one end of the third locking knob 3021 can be configured as a matching tapered structure, with the outer sheath 500 fixed between the two tapered structures. Alternatively, glue can be used for direct bonding and fixing.
[0098] In one embodiment, one end of the second housing 100 is provided with a head end rotating member 102, which is rotatably disposed at the end of the second housing 100 away from the second fixed rod 200. The head end rotating member 102 is provided with a first guide tube 1021, as shown in Figures 4 and 6. The first guide tube 1021 is adapted to the second channel 201 of the second fixed rod 200. The first guide tube 1021 is movably inserted into the second channel 201 and can rotate relative to the second fixed rod 200.
[0099] Furthermore, a clamp retainer is provided on the head end rotating member 102, which is detachably mounted on the head end rotating member 102. Specifically, the clamp retainer is connected to the head end rotating member 102 via a Luer joint. Optionally, the two can also be connected by an interference fit snap-fit.
[0100] Further, as shown in Figures 12-14, the clamp fixation device includes an endoscope latch 1023 adapted to the endoscope clamp opening 1025, a first rotating member 1022, and an elastic seal 1024. The elastic seal 1024 has a first fixing channel and is disposed within the first rotating member 1022. The first rotating member 1022 and the endoscope latch 1023 are threaded together. When the first rotating member 1022 is tightened and fixed, the elastic seal 1024 compresses the stress expansion tube sleeved on the head end rotating member 102, thereby fixing the ablation device relative to the endoscope clamp opening 1025 and avoiding the risk of off-target.
[0101] Specifically, as shown in Figures 12 and 13, a first locking external thread is provided at one end of the endoscope buckle 1023, and a matching first locking internal thread is provided on the first rotating member 1022. At the same time, a first fixing sleeve 10221 with an elastic structure is provided at the corresponding position of the first locking internal thread, and an elastic sealing member 1024 is provided in the first fixing sleeve 10221. The first rotating member 1022 with the first locking internal thread section is frustoconical. When the first locking internal thread and the first locking external thread are engaged, the inner diameter of the first locking internal thread section gradually decreases, thereby causing the first rotating member 1022 to squeeze the first locking external thread section of the endoscope buckle 1023, and then squeeze the first fixing sleeve 10221 and the elastic sealing member 1024 provided in the first fixing sleeve 10221, thereby squeezing the stress expansion tube on the head end rotating member 102, and fixing the position of the outer sheath tube 500 relative to the endoscope, as shown in Figure 21, reducing the risk of missing the target.
[0102] Optionally, the structure of the present invention can also be connected to a robot channel 900 having the same structure as the endoscope forceps port, as shown in FIG27. The robot channel 900 has a robot connection port, and the device of the present invention can be detachably connected to the robot connection port.
[0103] Optionally, as shown in Figures 22-23, a first wire 406 can be provided and fixedly connected to the first housing 400. One end of the first wire 406 is electrically connected to the first needle tube 600, and the other end of the first wire 406 extends out of the first housing 400 and is connected to an external power source. Specifically, a Luer connector 405 is provided at one end of the first housing 400. The Luer connector 405 includes a first metal conductive part 4052 and a first non-metallic insulating part 4051. The first metal conductive part 4052 is electrically connected to the first needle tube 600, and the first non-metallic insulating part 4051 extends out of the outside of the first housing 400 to form a Luer interface. The first wire 406 is connected to the first metal conductive part 4052 to realize energy transmission.
[0104] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A medical device, characterized in that, include: The first fixed rod has a through first channel; The second fixing rod has a through second channel; The first housing has a first cavity. The first housing is sleeved on one end of the first fixing rod. The first housing can move relatively linearly along the axis of the first fixing rod. The second housing has a second cavity. The second housing is sleeved on one end of the second fixing rod. The second housing can move relatively linearly along the axis of the second fixing rod. The first fixing rod and the second fixing rod are detachably connected, and a first fixing component is provided at the connection between the first fixing rod and the second fixing rod. The first fixing component is provided with a retractable first locking channel. The outer sheath tube has a through third channel. The outer sheath tube is located at one end of the second housing. One end of the outer sheath tube passes through the first locking channel and is connected to the first fixing rod. The medical consumable has a slender structure and is movably inserted into the third channel of the outer sheath. The medical consumable has a distal end and a proximal end, and the distal end of the medical consumable can extend out or be stored in the outer sheath.
2. The medical device according to claim 1, characterized in that, The first fixing component includes a first locking knob, an elastic fixing member, and a first top block. The first locking channel is disposed on the elastic fixing member. The first locking knob has a through first installation channel. The elastic fixing member is disposed in the first installation channel. The first top block is disposed on the second fixing rod. The first locking knob is provided with a first external thread, and the second fixing rod is provided with a corresponding first internal thread. When the first locking knob is screwed on, the first top block presses against the elastic fixing member to reduce the inner diameter of the first locking channel.
3. A medical device according to claim 2, characterized in that, The second fixing rod is provided with a second external thread, and the first fixing rod is provided with a matching second internal thread, wherein the inner diameter of the second internal thread is larger than the outer diameter of the first locking knob.
4. A medical device according to claim 1, characterized in that, It also includes a first limiting component disposed at the connection between the first fixed rod and the second fixed rod. The first limiting component includes a first limiting base disposed on the first fixed rod, a first cover plate detachably connected to the first limiting base, and a first adjusting button. A third cavity is provided between the first limiting base and the first cover plate, and part of the first adjusting button is movably disposed in the third cavity. The first adjustment button and the second fixing rod are provided with a second limiting structure that cooperates with each other. The second limiting structure includes a second limiting post on the first adjustment button and a second limiting hole on the second fixing rod, or a second limiting hole on the first adjustment button and a second limiting post on the second fixing rod. The second limiting post can be inserted into or removed from the second limiting hole.
5. A medical device according to claim 4, characterized in that, The first adjustment button is provided with a first abutting surface, and the first limiting base is provided with a second abutting surface. The first abutting surface abuts against the second abutting surface, wherein the moving direction of the second abutting surface relative to the first abutting surface is consistent with the moving direction of the second limiting post relative to the second limiting hole.
6. A medical device according to claim 4, characterized in that, The first adjustment button is provided with a first limiting boss, the first limiting base is provided with a first limiting groove and / or the first cover plate is provided with a first limiting groove; Alternatively, the first adjustment button may be provided with a first limiting groove, the first limiting base may be provided with a first limiting boss, and / or the first cover plate may be provided with a first limiting boss; Wherein, the first limiting groove is adapted to the first limiting boss, the first limiting boss is inserted into the first limiting groove, the moving direction of the first limiting boss relative to the first limiting groove is consistent with the moving direction of the second limiting post relative to the second limiting hole, and the length of the first limiting groove is not less than the moving distance of the non-fixed end of the second limiting post.
7. A medical device according to claim 6, characterized in that, A reset spring is provided between the first limiting base and the first adjustment button. The fixed end of the reset spring is disposed on the first limiting base, and the free end of the reset spring abuts against the first adjustment button.
8. A medical device according to claim 1, characterized in that, One end of the second housing is provided with a head end rotating component, which is rotatably disposed at the end of the second housing away from the second fixed rod. The head end rotating component is provided with a first guide tube, which is adapted to the second channel of the second fixed rod. The first guide tube is movably inserted into the second channel and can rotate relative to the first fixed rod.
9. A medical device according to claim 8, characterized in that, It also includes a clamp channel retainer disposed on the head end rotating member. The clamp channel retainer is detachably disposed on the head end rotating member. The clamp channel retainer includes an endoscope buckle adapted to the endoscope clamp channel opening, a first rotating member, and an elastic seal. The elastic seal has a first fixing channel and is disposed inside the first rotating member. The first rotating member and the endoscope buckle are threaded together. When the first rotating member is tightened and fixed, the endoscope clamp channel opening squeezes the elastic seal, thereby shrinking the first fixing channel to lock and fix the stress tube sleeved on the outer sheath.
10. A medical device according to any one of claims 1-9, characterized in that, The medical consumable is an aspiration needle tube, one end of which is provided with a puncture tip, and the other end of the aspiration needle tube is connected to the first housing. The aspiration needle tube is provided with a first aspiration channel that passes through itself.
11. A medical device according to claim 10, characterized in that, It also includes a needle core, one end of which is provided with a needle cap, which is detachably connected to the first housing. The needle core is movably inserted into the first suction channel, and the other end of the needle core does not protrude from the puncture tip of the suction needle tube.
12. A medical device according to claim 10, characterized in that, It also includes a negative pressure device, which is detachably connected to the first housing and communicates with the first suction channel.
13. A medical device according to any one of claims 1-9, characterized in that, The medical consumable is a rod-shaped first push rod, the proximal end of which is connected to the first housing, and the distal end of which is provided with an ablation electrode, which can be configured with ablation energy.
14. A medical device according to claim 13, characterized in that, The first push rod and the ablation electrode are integrally formed of a metallic conductive material. The first push rod is provided with a first insulating layer, wherein the distal part of the first push rod is exposed to form an ablation electrode.
15. A medical device according to claim 14, characterized in that, The ablation electrode has a puncture needle tip, wherein the first push rod is provided with a through fourth channel, the fourth channel passing through the ablation electrode to form a first needle tube, and the fourth channel can be used to communicate with a negative pressure device or to insert an electrode needle.