Interventional device

Abstract

The utility model discloses interventional equipment. The interventional equipment comprises a needle seat, a needle head and a needle head, the needle body is fixedly arranged on the needle seat; the first channel penetrates through the needle base and the needle body, and the first channel is used for an interventional surgical instrument to penetrate through; the second channel penetrates through the needle base and the needle body, the second channel and the first channel are mutually independent, and the second channel is used for allowing a navigation sensor to penetrate; the two ends of the limiting connector are used for being connected with an interventional surgical instrument and the needle base respectively so as to control the movement amount of the interventional surgical instrument in the interventional direction along the first channel. According to the interventional surgical instrument, the interventional process of the interventional surgical instrument is navigated, the position of the front end of the interventional surgical instrument can be accurately obtained in the interventional process, and surgical operation can be facilitated; and the influence of the front end of the interventional surgical instrument on the navigation sensor and healthy tissues in the surgical process can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, specifically, relate to an interventional device. BACKGROUND

[0002] In the related art, the coaxial needle mainly creates the body access for the interventional surgical instrument (for example, the ablation needle and the biopsy needle), and reaches the operation position under the ultrasonic guidance. However, the technology cannot realize the accurate point operation of target tissue, and can only judge the spatial position of the needle through the strong echo of the needle tip under the ultrasound. This not only tests the ultrasonic skill of the operation doctor, but also significantly increases the difficulty of the operation. SUMMARY

[0003] The main purpose of the utility model is to provide an interventional device to solve the problem that accurate point operation of target tissue cannot be realized in the related art, and the spatial position of the needle can only be judged through the strong echo of the needle tip under the ultrasound, thereby leading to greater difficulty in operation.

[0004] In order to achieve the above purpose, the utility model provides an interventional device, which comprises:

[0005] A needle seat;

[0006] A needle body fixed to the needle seat;

[0007] A first channel penetrating through the needle seat and the needle body, the first channel being used for passing through the interventional surgical instrument;

[0008] A second channel penetrating through the needle seat and the needle body, the second channel being independent of the first channel, and the second channel being used for passing through the navigation sensor;

[0009] A limiting joint, two ends of the limiting joint being respectively used for connecting the interventional surgical instrument and the needle seat to control the movement amount of the interventional surgical instrument in the interventional direction along the first channel.

[0010] Further, the needle body comprises a first needle tube and a second needle tube, the first end of the first needle tube and the second needle tube being fixed on the needle seat, the second end of the second needle tube not exceeding the second end of the first needle tube, the first channel penetrating through the needle seat and the first needle tube, and the second channel penetrating through the needle seat and the second needle tube.

[0011] Further, the second needle tube is arranged on the outer side of the first needle tube and closely adheres to the first needle tube.

[0012] Further, the front end of the second needle tube does not exceed the front end of the first needle tube, and the front end of the second needle tube is provided as a pointed end.

[0013] Further, the second needle tube is arranged in the first needle tube.

[0014] Further, the needle seat comprises a first interface corresponding to the first channel and a second interface corresponding to the second channel.

[0015] Further, the needle seat is provided with a hemostasis valve at an end away from the needle body, the hemostasis valve being used to hold the interventional surgical instrument and block a gap between a rear end of the interventional surgical instrument and a rear end of the first channel.

[0016] Further, the limiting connector is used to be detachably clamped on the interventional surgical instrument, a first end of the limiting connector being used to abut against a fixed end of the interventional surgical instrument, and a second end of the limiting connector being used to abut against the first interface of the needle seat.

[0017] Further, the limiting connector is provided with a clamping groove penetrating in the axial direction, the clamping groove comprising a clamping-in section and a clamping section arranged in sequence in a clamping-in direction, the clamping-in section being arranged as a constricted structure, and the clamping section being used to be in close contact with the interventional surgical instrument.

[0018] Further, the limiting connector comprises a shell and an inner core.

[0019] The inner core is fixedly arranged in the shell, the shell being arranged as a rigid structure, the inner core being elastic, the clamping groove being arranged on the inner core, and the shell being provided with an elongated opening at a position corresponding to the clamping groove, a first end of the shell being used to abut against the fixed end of the interventional surgical instrument, and a second end of the shell being used to abut against the needle seat.

[0020] Further, the limiting connector further comprises a T-shaped piece, the T-shaped piece being fixed to a side of the shell away from the elongated opening.

[0021] Further, the limiting connector comprises two limiting blocks arranged in a split manner, the two limiting blocks being oppositely arranged and being used to be buckled and fixed on the interventional surgical instrument, a first end of the limiting block being used to abut against the fixed end of the interventional surgical instrument, and a second end of the limiting block being used to abut against the needle seat.

[0022] In the embodiment of the utility model, through setting needle seat, needle body, the needle body is fixed on needle seat, first channel, first channel runs through needle seat and needle body, first channel is used for the intervention type operation instrument passes through, second channel, second channel runs through needle seat and needle body, second channel and first channel are independent, second channel is used for the navigation sensor is worn, limit connector, limit connector is used for controlling the intervention type operation instrument along first channel in the intervention direction's moving amount, on one hand reached the two independent channels are formed on needle body, intervention type operation instrument can be installed in first channel, navigation sensor can be installed in second channel, after intervention human body, the purpose that can determine intervention type operation instrument position using navigation sensor, so that the intervention process of intervention type operation instrument is navigated, make intervention type operation instrument can accurate point operation of target tissue's technical effect, further solve the problem that related art can not accurate point operation of target tissue, only can judge the spatial position of needle through the strong echo of needle tip under ultrasonic, further lead to the problem that the operation difficulty is biger,

[0023] On the other hand, reach under the action of limit connector can control the length that intervention type operation instrument extends first channel, before reaching target tissue, the length that intervention type operation instrument extends first channel is short or does not extend first channel, make the front end of intervention type operation instrument is relatively close to navigation sensor, so as to facilitate accurate acquisition of the position of the front end of intervention type operation instrument, when approaching target tissue, adjust limit connector to make intervention type operation instrument can further extend first channel to enter target tissue and operate the purpose, so as to realize in the intervention process can accurately obtain the position of the front end of intervention type operation instrument, can also facilitate operation, and can also reduce the influence of the front end of intervention type operation instrument on navigation sensor and healthy tissue in the operation process Technical effect. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings serve to explain the present application together with the written description. In the drawings:

[0025] Figure 1 It is the structure schematic drawing of needle body and needle seat connection in the intervention equipment according to the embodiment of the utility model;

[0026] Figure 2 It is the structure schematic drawing of needle body and needle seat connection in the intervention equipment according to the embodiment of the utility model;

[0027] Figure 3 It is the structure schematic drawing of needle body and needle seat connection in the intervention equipment according to the embodiment of the utility model;

[0028] Figure 4 is a structure schematic diagram according to the embodiment of the utility model for installing the hemostatic valve;

[0029] Figure 5 is a structure schematic diagram after installing the hemostatic valve on the basis of Figure 2

[0030] Figure 6 is a structure schematic diagram before installing the limiting joint according to the embodiment of the utility model;

[0031] Figure 7 is a structure schematic diagram after installing the limiting joint according to the embodiment of the utility model;

[0032] Figure 8 is a structure schematic diagram when operating according to the embodiment of the utility model;

[0033] Wherein, 1 needle seat, 10 first interface, 11 second interface, 2 needle body, 20 first channel, 200 first needle tube, 21 second channel, 210 second needle tube, 3 limiting joint, 30 shell, 31 long strip opening, 32 clamping groove, 320 clamping section, 321 clamping section, 33 inner core, 34 T-shaped piece, 4 interventional surgical instrument, 40 fixed end, 400 needle handle, 41 needle, 5 hemostatic valve. DETAILED DESCRIPTION

[0034] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0035] It should be noted that the terms "first", "second" and the like in the description and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein.

[0036] In the utility model, the orientation or position relationship indicated by the terms "upper", "lower", "inner" and the like is based on the orientation or position relationship shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0037] ​Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0038] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In addition, the term "multiple" should mean two or more.

[0040] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] To solve related technical problems, such as Figures 1 to 5 As shown, this utility model embodiment provides an interventional device, which includes:

[0042] Needle hub 1;

[0043] Needle body 2, which is fixed on needle seat 1;

[0044] The first channel 20 passes through the needle hub 1 and the needle body 2, and the first channel 20 is used for the interventional surgical instrument 4 to pass through.

[0045] The second channel 21 passes through the needle holder 1 and the needle body 2. The second channel 21 is independent of the first channel 20. The second channel 21 is used for the navigation sensor to pass through.

[0046] The limiting connector 3 has two ends for connecting to the interventional surgical instrument 4 and the needle hub 1, respectively, to control the amount of movement of the interventional surgical instrument 4 along the first channel 20 in the interventional direction.

[0047] In the present embodiment, the interventional device comprises a needle holder 1 and a needle body 2 fixed on the needle holder 1. A first channel 20 and a second channel 21 are arranged through the needle body 2 and the needle holder 1. The first channel 20 and the second channel 21 can be in a nested relationship or a side-by-side relationship, which is not limited in the present embodiment. In addition, when the needle holder 1 and the needle body 2 are two separate parts, the first channel 20 comprises a channel on the needle body 2 and a channel on the needle holder 1. When the needle body 2 and the needle holder 1 are connected, the two channels are connected to form the first channel 20. The second channel 21 is similar, which is not described herein.

[0048] The first channel 20 and the second channel 21 constitute two cavities of the interventional device. The first channel 20 is used for the interventional surgical instrument 4 to pass through, that is, the interventional surgical instrument 4 can pass into the first channel 20 from the rear end of the first channel 20 and pass out from the front end of the first channel 20. The second channel 21 is used for the navigation sensor to pass into, and the navigation sensor can also pass into the second channel 21 from the rear end of the second channel 21 and extend to the front end of the second channel 21. The front end of the second channel 21 should be close to the front end of the first channel 20, so that the navigation sensor can be located close to the front end of the interventional surgical instrument 4, thereby facilitating accurate acquisition of the position of the front end of the interventional surgical instrument 4 during the interventional procedure.

[0049] According to the structure of the interventional surgical instrument 4, the first channel 20 has a matching structure. In an embodiment, the interventional surgical instrument 4 can be a needle 41 or a biopsy needle 41, and the corresponding first channel 20 is a cylindrical channel with a size matching that of the interventional surgical instrument 4.

[0050] According to the structure of the navigation sensor, the second channel 21 also has a matching structure. In an embodiment, the navigation sensor is an electromagnetic navigation sensor, and the second channel 21 should be able to accommodate the electromagnetic navigation sensor and the cable connected to the sensor.

[0051] Before the intervention on the human body, the interventional surgical instrument 4 is installed on the interventional device through the first channel 20, and the front end of the interventional surgical instrument 4 is close to the front end of the second channel 21. According to the surgical operation, the front end of the interventional surgical instrument 4 can extend out of the first channel 20 by a distance or not. The navigation sensor is installed on the interventional device through the second channel 21 and located at the front end of the second channel 21. During the interventional procedure, the interventional surgical instrument 4, the navigation sensor and the interventional device move synchronously. In this process, the position of the interventional surgical instrument 4, especially the position of the front end of the interventional surgical instrument 4, is located by the navigation sensor. In order to facilitate the fixation of the navigation sensor, a corresponding fixing structure can be provided on the needle holder 1 and the cable part of the navigation sensor, for example, a thread can be provided on the needle holder 1, and a nut is provided at the end of the cable part, which is connected by the nut and the thread to fix the navigation sensor.

[0052] As Figure 2 and Figure 5 In order to keep the relative position between the interventional surgical instrument 4 and the needle 2 of the interventional device fixed during the intervention, the interventional device in this embodiment further comprises a limiting joint 3, which in this embodiment functions to control the moving amount of the interventional surgical instrument 4 along the first channel 20 in the interventional direction. Specifically, the limiting joint 3 is used to be detachably clamped on the interventional surgical instrument 4, the first end of the limiting joint 3 is used to abut against the fixed end 40 of the interventional surgical instrument 4, and the second end of the limiting joint 3 is used to abut against the needle seat 1, so as to control the moving amount of the interventional surgical instrument 4 along the first channel 20 in the interventional direction through the limiting joint 3.

[0053] Before performing the surgical operation on the target position, it is expected that the distance between the front end of the interventional surgical instrument 4 and the navigation sensor under the action of the limiting joint 3 is close, so as to facilitate positioning the position of the front end of the interventional surgical instrument 4. When it is needed to perform the surgical operation on the target position, the interventional surgical instrument 4 is expected to be able to move forward along the first channel 20 to the target position to perform the surgical operation by adjusting the limiting structure.

[0054] Based on the above purpose, the limiting joint 3 can have various structural forms. As Figure 5 shown, in one embodiment, the interventional surgical instrument 4 is an ablation needle, the needle 41 comprises the needle 41 and the fixed end 40, and in this embodiment, the fixed end 40 can be a needle handle 400 fixed at the rear end of the needle 41. Before the operation, the needle 41 penetrates into the first channel 20, the needle handle 400 is located outside the first channel 20 and maintains a distance with the needle seat 1, and the two ends of the limiting joint 3 can abut against the end faces of the needle seat 1 and the needle handle 400 respectively, so that the distance between the front end of the needle 41 and the front end of the first channel 20 can be limited by the length control of the first channel 20 and the length control of the limiting joint 3. For the needle 41, the front end of the needle 41 can be limited to extend out of the first channel 20 by a small length. After reaching the target position, the limiting joint 3 can be adjusted to be detached from the needle handle 400, at which time the needle handle 400 can be pushed to move the needle 41 forward along the first channel 20 to the diseased tissue (target position) for ablation operation. For the needle 41, firstly, the interventional device does not enter the diseased tissue during ablation, so the interventional device does not interfere with the ablation process of the needle 41, and secondly, during the ablation process, the front end (i.e. the ablation end) of the needle 41 is relatively far away from the navigation sensor in the second channel 21, and the energy of the ablation end is not easy to affect the navigation sensor.

[0055] In another embodiment of the limiting connector 3, the limiting connector 3 is movably connected to the needle holder 1 (e.g., hinged or sliding connection). Before installing the needle 41, the position of the limiting connector 3 is adjusted to allow space for the needle 41. After the needle 41 is inserted into the first channel 20, the position of the limiting connector 3 can be readjusted (e.g., rotated or slid out) so that the end of the limiting connector 3 abuts against the needle shank 400 of the needle 41. Upon approaching the lesion tissue, the position of the limiting connector 3 is reversed to allow the needle 41 to move freely to enter the lesion assembly for ablation.

[0056] It should be noted that the above description of the specific structure and movement of the limiting connector 3 is not restrictive, and those skilled in the art can design it according to actual needs. Similarly, the description of the interventional surgical instrument 4 is not restrictive, and those skilled in the art can use corresponding interventional devices according to actual needs.

[0057] Taking ablation surgery as an example, the interventional surgical instrument 4 is needle 41. Before preparing for the ablation surgery, the size of the tumor is determined through pre-operative imaging examinations, and a needle 41 of appropriate specifications is selected to match the appropriate interventional device. Figure 6 As shown, first insert the needle 41 into the first channel 20 through the needle holder 1, as follows. Figure 7 As shown, the limiting connector 3 is then attached to the needle 41, and the handle of the needle 41 is pushed to engage with the limiting connector 3. Then, the navigation sensor is inserted into the second channel 21 through the needle seat 1, and the nut at one end of the sensor is tightened to lock its relative position with the thread on the double-chamber seat. At this point, the spatial position of the needle 41 can be detected in real time on the navigation system. After the preliminary preparations are completed, the patient's skin at the needle insertion point is disinfected, and then the prepared interventional device and needle 41 are simultaneously inserted into the body. Under the guidance of the navigation system, the interventional device reaches the ablation target tissue. Then, the limiting connector 3 is removed, as shown... Figure 8 As shown, the needle 41 is pushed into the tumor or other lesion site through the first channel 20 for ablation, while the interventional device remains outside the ablated tissue. After ablation, the needle 41 is withdrawn from the body using the interventional device to prevent tumor cell transplantation into the abdominal wall.

[0058] This invention achieves two independent channels on the needle body 2. The interventional surgical instrument 4 can be installed in the first channel 20, and the navigation sensor can be installed in the second channel 21, making the interventional surgical instrument 4 and the navigation sensor an integrated unit. The navigation system can identify the spatial position of the interventional surgical instrument 4 in the body in real time. Furthermore, the navigation system can reserve the position for the interventional surgical instrument 4 to puncture forward after the limiting connector 3 is removed. This allows the actual position to be seen before the interventional surgical instrument 4 reaches the target position, making the surgical operation more precise and simple.

[0059] On the other hand, the length of the interventional surgical instrument 4 extending out of the first channel 20 can be controlled under the action of the limiting joint 3. Before reaching the target tissue, the interventional surgical instrument 4 extends out of the first channel 20 for a short length or does not extend out of the first channel 20, so that the front end of the interventional surgical instrument 4 is relatively close to the navigation sensor, thereby facilitating accurate acquisition of the position of the front end of the interventional surgical instrument 4. When approaching the target tissue, the limiting joint 3 is adjusted to enable the interventional surgical instrument 4 to further extend out of the first channel 20 for the purpose of entering the target tissue for surgical operation, thereby achieving the technical effects of accurately acquiring the position of the front end of the interventional surgical instrument 4 during the intervention, facilitating surgical operation, and reducing the influence of the front end of the interventional surgical instrument 4 on the navigation sensor and healthy tissue during the operation.

[0060] As shown in Figure 1 In order to make the needle body 2 have the first channel 20 and the second channel 21 which are independent of each other, in an embodiment, the needle body 2 includes a hollow first needle tube 200 and a second needle tube 210. The first needle tube 200 and the second needle tube 210 are arranged side by side or in an inside-out sleeve arrangement. The first needle tube 200 and the second needle tube 210 can be welded or bonded and fixed. The first ends of the first needle tube 200 and the second needle tube 210 are fixed on the needle seat 1. The second end of the second needle tube 210 does not exceed the second end of the first needle tube 200. The first channel 20 penetrates through the needle seat 1 and the first needle tube 200. The second channel 21 penetrates through the needle seat 1 and the second needle tube 210.

[0061] Specifically, in the present embodiment, the hollow cavity in the first needle tube 200 constitutes part of the first channel 20, and the other part of the first channel 20 is located on the needle seat 1. The hollow cavity in the second needle tube 210 constitutes part of the second channel 21, and the other part of the second channel 21 is located on the needle seat 1. In an embodiment, the diameter of the first needle tube 200 is greater than the diameter of the second needle tube 210. The first needle tube 200 is used for the needle 41 to pass through, and the second needle tube 210 is used for the electromagnetic navigation sensor to pass through.

[0062] In order to accurately position the interventional surgical instrument 4 passing through the first needle tube 200 and avoid the influence of the interventional surgical instrument 4 on the navigation sensor during the surgical operation, in the present embodiment, the front end of the second needle tube 210 does not exceed the front end of the first needle tube 200. In other words, the front end of the second needle tube 210 can be flush with the front end of the first needle tube 200, or shorter than the front end of the first needle tube 200. As a preferred manner, it is preferred that the front end of the second needle tube 210 is shorter than the front end of the first needle tube 200, and the distance between the two ends is 1-5 mm.

[0063] When the needle body 2 includes a hollow first needle tube 200 and a second needle tube 210, the first needle tube 200 and the second needle tube 210 are arranged side by side or in an inner and outer sleeve arrangement. When the second needle tube 210 is sleeved inside the first needle tube 200, taking both the first needle tube 200 and the second needle tube 210 as cylindrical hollow tubes, and the interventional surgical instrument 4 as a needle 41 as an example, the needle 41 is generally cylindrical. After the first needle tube 200 and the second needle tube 210 are sleeved, the space between the two needle tubes 200 and 210 needs to accommodate the insertion of the cylindrical needle 41, which will result in a large amount of wasted space between the two needle tubes. Under size constraints, the diameter of the second needle tube 210 will be relatively larger, resulting in an increase in the diameter of the entire interventional device.

[0064] Therefore, in order to improve space utilization and keep the size of the entire interventional device within a reasonable range, such as Figure 1 As shown, in this embodiment, the second needle tube 210 is preferably arranged side by side outside the first needle tube 200. In this embodiment, the diameter of the first needle tube 200 can be matched with the needle 41, so that there is no wasted space inside the first needle tube 200. Similarly, the diameter of the second needle tube 210 can also be matched with the navigation sensor.

[0065] In some surgical procedures, the tip of the second needle tube 210 needs to be punctured. Therefore, in order to facilitate puncture, the second end of the second needle tube 210 in this embodiment is a pointed tip.

[0066] Since a portion of the first channel 20 and the second channel 21 is located within the needle hub 1, both the interventional surgical instrument 4 and the navigation sensor need to pass through the corresponding channels from the needle hub 1. Therefore, as Figure 1 As shown, the needle holder 1 in this embodiment includes a first interface 10 and a second interface 11. The first interface 10 corresponds to the first channel 20, and the second interface 11 corresponds to the second channel 21.

[0067] In one embodiment, the first interface 10 and the second interface 11 can be side-by-side interfaces with their axes parallel. Although this structure can meet the insertion requirements of the interventional surgical instrument 4 and the navigation sensor, the interventional surgical instrument 4 also needs to be pushed forward during the surgical procedure, which can easily cause interference between the interventional device and the cable portion of the navigation sensor.

[0068] In another implementation, such as Figure 1As shown, the needle seat 1 is provided in a Y-shaped structure, which includes a straight section and an inclined section, the first interface 10 is located on the straight section and corresponds to the first channel 20, and the first interface 10 is coaxial with the first channel 20. The second interface 11 is located on the inclined section, and the second channel 21 is partially curved in the needle seat 1 to connect the second interface 11 and the second needle tube 210. In this embodiment, the position of the second interface 11 is staggered with the position of the first interface 10, and the movement of the interventional surgical instrument 4 will not interfere with the navigation sensor.

[0069] Since the interventional surgical instrument 4 is arranged in the first channel 20, there will be a gap between the interventional surgical instrument 4 and the first channel 20, in order to avoid blood flowing out from the end of the interventional device through the gap during the operation, such as Figure 4 As shown, a hemostatic valve 5 is arranged at the end of the needle seat 1 away from the needle body 2 in this embodiment, and the hemostatic valve 5 is used to tightly hold the interventional surgical instrument 4 and block the gap between the rear end of the interventional surgical instrument 4 and the rear end of the first channel 20.

[0070] In this embodiment, the hemostatic valve 5 is a rotary hemostatic valve, which includes a rotating head, an anti-friction pad and silicone, the rotating head is installed on the needle seat 1, and by rotating the rotating head, the silicone is deformed to tightly hold the needle 41, so as to isolate the blood. By using the rotary hemostatic valve 5, the leakage of tissue blood to the outside through the gap during the puncture process or the operation process can be avoided.

[0071] In the utility model, the function of the limiting connector 3 is to control the movement amount of the interventional surgical instrument 4 in the interventional direction along the first channel 20. In one embodiment of the limiting connector 3, the limiting connector 3 is used to be detachably clamped on the interventional surgical instrument 4, the first end of the limiting connector 3 is used to abut against the fixed end 40 of the interventional surgical instrument 4, and the second end of the limiting connector 3 is used to abut against the needle seat 1.

[0072] Specifically, in this embodiment, taking the needle 41 of the interventional surgical instrument 4 as an example, the limiting connector 3 can be clamped on the needle 41, and after installation, the two ends of the limiting connector 3 abut against the needle seat 1 and the needle handle 400 of the needle 41 respectively, so that the needle 41 is fixed in the first channel 20 during the interventional process. The limiting connector 3 can be removed from the needle 41 after approaching the target position, and at this time, the needle handle 400 can be further pushed to push the front end of the needle 41 out of the first channel 20 to the target position to perform ablation.

[0073] In order to facilitate the clamping of the limiting connector 3 on the interventional surgical instrument 4, such as Figure 3As shown, the limiting connector 3 in the embodiment is provided with a clamping groove 32 penetrating in the axial direction, further, the clamping groove 32 includes a clamping segment 320 and a clamping segment 321 arranged in sequence in the clamping direction, the clamping segment 320 is provided as a necked structure, and the clamping segment 321 is used to adhere to the interventional surgical instrument 4.

[0074] In the embodiment, the necked structure of the clamping segment 320 can facilitate the clamping of the interventional surgical instrument 4 (for example, the needle 41 of the needle 41), and the clamping segment 321 can better hold the interventional surgical instrument 4. In the embodiment, the necking direction of the clamping segment 320 is towards the clamping segment 321, and the diameter of the clamping segment 321 is greater than the minimum opening size of the clamping segment 320, so as to ensure that the clamping segment 321 holds the interventional surgical instrument 4, and the limiting connector 3 will not fall off.

[0075] On the basis of the above-mentioned embodiment, in order to further facilitate the installation and use of the limiting connector 3, the limiting connector 3 in the embodiment includes a shell 30 and an inner core 33; the inner core 33 is fixedly arranged in the shell 30, the shell 30 is provided as a rigid structure, the inner core 33 has elasticity, the clamping groove 32 is arranged on the inner core 33, the shell 30 is provided with a long strip-shaped opening 31 at a position corresponding to the clamping groove 32, a first end of the shell 30 is used to abut against the fixed end 40 of the interventional surgical instrument 4, and a second end of the shell 30 is used to abut against the needle seat 1.

[0076] Specifically, in the embodiment, the limiting connector 3 includes two parts, which are the rigid shell 30 and the elastic inner core 33, respectively. The rigid shell 30 plays a role in ensuring sufficient structural strength of the limiting connector 3, and the two ends of the rigid shell 30 abut against the needle seat 1 and the fixed end 40 of the interventional surgical instrument 4, respectively, when limiting the interventional surgical instrument 4. During installation, since the inner core 33 has a certain elasticity and the clamping groove 32 is arranged on the inner core 33, the inner core 33 can deform by a certain amount during installation, so that the clamping groove 32 can be more tightly clamped on the interventional surgical instrument 4. In an embodiment of the inner core 33, the inner core 33 can be made of rubber.

[0077] In order to facilitate the installation and removal of the limiting connector 3, as shown, Figure 3 The limiting connector 3 in the embodiment further includes a T-shaped piece 34, which is fixed on the side of the shell 30 away from the long strip-shaped opening 31, and the T-shaped piece 34 can be used to facilitate manual removal of the limiting connector 3. It can be understood that in addition to the T-shaped piece 34, other structures can also be provided, which are not limited in the embodiment.

[0078] In another embodiment of the position-limiting joint 3, the position-limiting joint 3 comprises two position-limiting blocks arranged separately, which are arranged oppositely and used for being buckled and fixed on the interventional surgical instrument 4, the first end of the position-limiting block is used for abutting against the fixed end 40 of the interventional surgical instrument 4, and the second end of the position-limiting block is used for abutting against the needle seat 1.

[0079] Specifically, in the embodiment, the inner side of the position-limiting block has an arc-shaped groove, and the two arc-shaped grooves can be tightly held on the interventional surgical instrument 4 during installation. The two position-limiting blocks can be locked by a specific locking structure, for example, buckles capable of being buckled and connected can be arranged on the two position-limiting blocks, or bolts capable of playing a locking role can be arranged, and the like, which are not limited herein in the embodiment.

[0080] On the basis of the above-mentioned embodiments, in order to better clamp and fix the position-limiting block on the interventional surgical instrument 4, the position-limiting block comprises an arc-shaped rigid shell and a flexible core, and the arc-shaped groove is arranged on the flexible core. The flexible core can be made of rubber, and the elastic deformation of the flexible core can better clamp the interventional surgical instrument 4.

[0081] In the embodiment in which the position-limiting block is arranged as two blocks, since the corresponding buckle structure needs to be operated during installation and disassembly, the installation and disassembly are relatively inconvenient. Preferably, the embodiment in which the axial through clamping groove 32 is arranged on the position-limiting joint 3 is adopted.

[0082] The embodiment of the utility model further provides a kind of concrete implementation of puncture system based on electromagnetic positioning, including interventional device, second electromagnetic navigation sensor and navigation device in the above-mentioned embodiment.In use, second electromagnetic navigation sensor is fixed on ultrasonic probe, and ultrasonic probe can be body surface probe, can also be intraoperative probe, and this is not limited.Navigational device is arranged as can extract the electromagnetic signal of navigation sensor and second electromagnetic navigation sensor on interventional device, and the spatial position relationship of interventional device and ultrasonic probe is determined based on electromagnetic signal.

[0083] The above only describes preferred embodiments of the utility model and is not intended to limit the utility model.Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An interventional device, characterized in that, The utility model relates to a needle holder for interventional operation, which comprises: a needle holder; a needle body fixed to the needle holder; a first channel penetrating through the needle holder and the needle body, which is used for passing through an interventional operation instrument; a second channel penetrating through the needle holder and the needle body, which is independent of the first channel and is used for passing through a navigation sensor; a limiting connector, the two ends of which are respectively used for connecting with the interventional operation instrument and the needle holder to control the moving amount of the interventional operation instrument along the first channel in an interventional direction.

2. The interventional device of claim 1, wherein, The needle body comprises a first needle tube and a second needle tube, the first ends of the first needle tube and the second needle tube are fixed to the needle holder, the second end of the second needle tube does not exceed the second end of the first needle tube, the first channel penetrates through the needle holder and the first needle tube, and the second channel penetrates through the needle holder and the second needle tube.

3. The interventional device of claim 2, wherein, The second needle tube is arranged outside the first needle tube and closely adheres to the first needle tube.

4. The interventional device of claim 1, wherein, The needle holder comprises a first interface and a second interface, the first interface corresponds to the first channel, and the second interface corresponds to the second channel.

5. The interventional device of claim 1, wherein, The end of the needle holder away from the needle body is provided with a hemostasis valve, which is used for tightly holding the interventional operation instrument and blocking the gap between the rear end of the interventional operation instrument and the rear end of the first channel.

6. The interventional device of claim 4, wherein, The limiting connector is used for detachably clamping the interventional operation instrument, the first end of the limiting connector is used for abutting against the fixed end of the interventional operation instrument, and the second end of the limiting connector is used for abutting against the first interface of the needle holder.

7. The interventional device of claim 4, wherein, The limiting connector is provided with a clamping groove penetrating in the axial direction, the clamping groove comprises a clamping-in section and a clamping section arranged in sequence in a clamping-in direction, the clamping-in section is arranged as a constricted structure, and the clamping section is used for closely adhering to the interventional operation instrument.

8. The interventional device of claim 7, wherein, The limiting connector comprises a shell and an inner core. The inner core is fixedly arranged in the shell, the shell is arranged as a rigid structure, the inner core has elasticity, the clamping groove is arranged on the inner core, the shell is provided with an elongated opening corresponding to the clamping groove, the first end of the shell is used for abutting against the fixed end of the interventional operation instrument, and the second end of the shell is used for abutting against the needle holder.

9. The interventional device of claim 8, wherein, The limiting connector further comprises a T-shaped piece, which is fixed to the side of the shell away from the elongated opening.

10. The interventional device of claim 6, wherein, The limiting connector comprises two limiting blocks arranged in a split mode, the two limiting blocks are oppositely arranged and are used for buckling and fixing on the interventional operation instrument, the first end of the limiting block is used for abutting against the fixed end of the interventional operation instrument, and the second end of the limiting block is used for abutting against the needle holder.

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