Electromagnetic navigation sensor kit, ultrasonic probe assembly and puncture system

Abstract

The utility model relates to the technical field of medical equipment, and discloses an electromagnetic navigation sensor suite, an ultrasonic probe assembly and a puncture system, which comprise a mounting piece, an electromagnetic navigation sensor and a protective tube, wherein the mounting part is provided with a mounting part, the electromagnetic navigation sensor is sleeved and mounted in the protection tube, and the protection tube is mounted in the mounting part; the mount is for attachment to a front end of an intraoperative ultrasound probe. According to the utility model, the technical effects of being capable of determining the position of the puncture suite in the puncture process, facilitating the puncture operation of a doctor and improving the puncture success rate in the laparoscopic ultrasound-guided puncture operation are realized, and further the technical problems that the position of the puncture suite is difficult to determine and the puncture success rate is low in the laparoscopic ultrasound-guided puncture operation in the related technology are solved. And puncture is difficult.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular, to an electromagnetic navigation sensor kit, an intraoperative ultrasound probe assembly and a puncture system. Background Art

[0002] In the 1990s, the integration of ultrasound technology and laparoscopic technology promoted the emergence of laparoscopic ultrasound (LUS). With high-resolution images, LUS can detect tiny satellite lesions and metastatic lesions, mark important duct structures, determine resection margins, and guide punctures, making up for the blind spots in laparoscopic liver surgery, and is also vividly called the "third eye" of surgeons.

[0003] Different from open abdominal ultrasound-guided puncture, laparoscopic ultrasound-guided puncture neither has a puncture rack and precise guiding wire for guidance, nor a special puncture needle. The operator selects an 18G PTC needle for puncture, but the length of this needle is not enough for puncturing some liver segments. The operator needs to perform freehand puncture, and the puncture needle cannot be inserted from any direction and angle. To see the needle track clearly, the LUS-guided intrahepatic portal vein puncture should preferably be performed from the foot side to the head side. The puncture point on the liver surface is determined according to the position of the probe, the depth of the duct, and the angle between the puncture needle and the probe. After inserting the needle, withdraw the probe and find the needle track. The probe adjusts its position according to the depth of needle insertion, and the tip of the needle is monitored throughout the process to avoid other important duct structures. When the tip of the needle approaches the portal vein of the target liver segment, when the needle track and the target hepatic pedicle can be simultaneously displayed by slightly axially rotating the probe, determine the positional relationship between the needle track and the target hepatic pedicle, and judge whether the tip of the needle can further penetrate into the portal vein of the target liver segment.

[0004] In most cases, the LUS probe shows an oblique section of the liver. The clockwise and counterclockwise axial rotations of the probe represent the movement of the scanning plane to the right foot side and the left head side. Clinically, the needle insertion direction can be judged and adjusted according to this azimuth change in combination with the relative positions of the needle track and the target portal vein. If the needle track deviates far from the target portal vein, the needle needs to be withdrawn and the puncture point on the liver surface is reselected. Repeat the adjustment and correction to accurately penetrate into the target portal vein. After withdrawing the needle core, aspirate blood and then inject the corresponding dye.

[0005] Currently, there are already LUS probes with puncture channels and guiding wires. However, since the puncture channel is in the center of the probe and the angle is fixed, it is very difficult for the operator to accurately insert the needle into this channel through abdominal wall puncture. A slight angle mismatch will cause further difficulty in needle insertion. Since the probe cannot be rotated after the needle is inserted, it is difficult to display the needle track and the tip of the needle, and the puncture success rate is low. Given the high technical requirements for intrahepatic portal vein puncture under LUS, the existing LUS probes and puncture kits (such as puncture needles) far from meet the usage requirements of surgeons. Therefore, this technology is difficult to popularize and promote in a short time, and this technology urgently needs to be developed and improved. Content of the Utility Model

[0006] The main purpose of the present utility model is to provide an electromagnetic navigation sensor kit and an intraoperative ultrasound probe assembly, so as to solve the problem in the related art that it is difficult to determine the position of the puncture kit during laparoscopic ultrasound-guided puncture surgery, resulting in difficult puncture.

[0007] To achieve the above object, the present utility model provides an electromagnetic navigation sensor kit, including: a mounting member, an electromagnetic navigation sensor, and a protection tube; wherein,

[0008] The mounting member is provided with a mounting portion, the electromagnetic navigation sensor is sleeved and installed in the protection tube, and the protection tube is installed in the mounting portion;

[0009] The mounting member is used for attaching to the front end of an intraoperative ultrasound probe.

[0010] Further, the mounting portion is a mounting groove formed on the mounting member, the outer side of the protection tube is fitted and installed in the mounting groove, and the depth of the mounting groove is greater than or equal to the outer diameter of the protection tube.

[0011] Further, the front end of the mounting groove is a closed structure, the rear end of the mounting groove is an open structure, and the front end of the electromagnetic navigation sensor extends out of the protection tube and abuts against the inner front side of the closed structure of the mounting groove.

[0012] Further, the mounting member is provided with a second limiting structure, and the second limiting structure is used for restricting the axial movement of the mounting member after it is attached to the intraoperative ultrasound probe.

[0013] Further, the second limiting structure is a limiting protrusion provided on both sides of the mounting member; and / or,

[0014] The second limiting structure is a bump provided on the lower surface of the mounting member.

[0015] Further, the protection tube includes a first tube body and a second tube body, the first tube body is movably sleeved in the second tube body, and the electromagnetic navigation sensor is installed in the first tube body;

[0016] The front end of the second tube body is located behind the mounting member, and the front end of the first tube body extends into the second tube body and is installed in the mounting groove.

[0017] Further, the length by which the first tube body extends out of the second tube body is greater than the length of the bending portion on the intraoperative ultrasound probe.

[0018] Further, the materials of the first tube body and the second tube body are one or a combination of more of nickel-titanium, titanium alloy, or PI.

[0019] Further, it further includes fixing buckles. A plurality of the fixing buckles are provided, and the fixing buckles are used to attach the electromagnetic navigation sensor and the part of the protective tube extending out of the rear end of the mounting member to the intraoperative ultrasound probe.

[0020] According to another aspect of the present invention, there is provided an ultrasound probe assembly, including the above-mentioned electromagnetic navigation sensor kit.

[0021] According to another aspect of the present invention, there is provided a puncture system, including the above-mentioned ultrasound probe assembly, a puncture kit and a navigation device. Another electromagnetic navigation sensor kit is provided on the puncture kit;

[0022] The navigation device is configured to be able to extract the electromagnetic signals received by the two electromagnetic navigation sensor kits, and determine the positional relationship between the puncture kit and the intraoperative ultrasound probe based on the extracted electromagnetic signals.

[0023] Further, the navigation device is further configured to display the positional relationship. When the extension line of the puncture kit in the puncture direction intersects the ultrasound plane of the ultrasound probe assembly, at least the intersection point is displayed in the ultrasound image, and / or when the body of the puncture kit or its extension line is coplanar with the ultrasound plane, the extension line is displayed in the ultrasound image.

[0024] In the embodiment of the present invention, by providing a mounting member, an electromagnetic navigation sensor and a protective tube; wherein, a mounting portion is provided on the mounting member, the electromagnetic navigation sensor is sleeved and installed in the protective tube, and the protective tube is installed in the mounting portion; the mounting member is used to be attached to the front end of the intraoperative ultrasound probe, so that the electromagnetic navigation sensor can be installed on the mounting portion of the mounting member, and the mounting member can be attached to the front end of the intraoperative ultrasound probe, achieving the purpose of being able to obtain the relative position between the puncture kit and the intraoperative ultrasound probe by using the electromagnetic navigation sensor installed on the intraoperative ultrasound probe and the electromagnetic navigation sensor kit on the puncture kit, thereby realizing that in laparoscopic ultrasound-guided puncture surgery, the position of the puncture kit during the puncture process can be determined clearly, facilitating the doctor's puncture operation and improving the puncture success rate, and further solving the problem in the related art that in laparoscopic ultrasound-guided puncture surgery, it is difficult to determine the position of the puncture kit, resulting in difficult puncture. Description of the Drawings

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, making other features, objects and advantages of the present invention more obvious. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1is a schematic structural view of an intraoperative ultrasound probe according to an embodiment of the present utility model;

[0027] Figure 2 is a schematic structural view of the installation position of an electromagnetic navigation sensor kit according to an embodiment of the present utility model;

[0028] Figure 3 is a schematic structural view of the installation position of a connecting member according to an embodiment of the present utility model;

[0029] Figure 4 is a schematic structural view of a buckle main body according to an embodiment of the present utility model;

[0030] Figure 5 is a schematic structural view of the assembly of a buckle main body and a mounting member according to an embodiment of the present utility model;

[0031] Figure 6 is a schematic structural view of a buckle main body installed on an intraoperative ultrasound probe according to an embodiment of the present utility model;

[0032] Figure 7 is Figure 6 a sectional structural view of;

[0033] Figure 8 is an exploded structural view of an electromagnetic navigation sensor kit and a connection assembly after installation according to an embodiment of the present utility model;

[0034] Figure 9 is Figure 8 a side structural view of;

[0035] Figure 10 is an assembled structural view of an electromagnetic navigation sensor kit and a connection assembly after installation according to an embodiment of the present utility model;

[0036] Figure 11 is Figure 10 an assembled structural view from another perspective of;

[0037] Figure 12 is a schematic structural view of the bending part of an ultrasound probe after bending in different directions according to an embodiment of the present utility model;

[0038] Figure 13 is a schematic structural view of an intraoperative probe before passing through a trocar after installing a connection assembly according to an embodiment of the present utility model;

[0039] Figure 14 is a schematic structural view of an intraoperative probe after passing through a trocar after installing a connection assembly according to an embodiment of the present utility model;

[0040] Figure 15It is a schematic structural diagram of a buckle body according to an embodiment of the present utility model;

[0041] Figure 16 It is an axonometric structural diagram of a buckle body according to an embodiment of the present utility model;

[0042] Figure 17 It is a schematic structural diagram of a mounting member according to an embodiment of the present utility model;

[0043] Figure 18 It is a schematic structural diagram of an opened fastening structure according to an embodiment of the present utility model;

[0044] Figure 19 It is a schematic structural diagram of a fastened fastening structure according to an embodiment of the present utility model;

[0045] Figure 20 It is a schematic structural diagram of an opened fastening structure according to another embodiment of the present utility model;

[0046] Figure 21 It is a schematic structural diagram of a fastened fastening structure according to another embodiment of the present utility model;

[0047] Figure 22 It is a schematic structural diagram of an opened fastening structure according to still another embodiment of the present utility model;

[0048] Figure 23 It is a schematic structural diagram of an assembled fastening structure and an intraoperative ultrasound probe according to still another embodiment of the present utility model;

[0049] Figure 24 It is a schematic structural diagram of an opened fastening structure according to yet another embodiment of the present utility model;

[0050] Among them, 1 is an intraoperative ultrasound probe, 101 is a handle end, 102 is a handle, 103 is an insertion tube, 104 is a bending part, 105 is an acoustic window part, 106 is a transmitting acoustic window, 2 is a connecting member, 21 is a buckle body, 201 is an avoidance part, 202 is a card slot, 203 is a first limiting structure, 204 is a disassembly hole, 205 is an enclosing structure, 22 is a mounting member, 220 is a mounting groove, 221 is a card slot member, 222 is a second limiting structure, 23 is a fastening structure, 230 is a deformed wide groove,

[0051] 231 is a first opening structure, 2310 is a first clamping groove, 23101 is a first groove body, 23102 is a second groove body, 232 is a first fastening buckle, 2320 is a first clamping protrusion, 2321 is a first connecting strip,

[0052] 233 is a second fastening buckle, 2331 is a second connecting strip, 2332 is a second clamping protrusion, 234 is a third fastening buckle, 2341 is a second clamping groove, 235 is an arc-shaped connecting groove, 236 is an elastic member, 237 is a second opening structure,

[0053] 238 First notch, 239 First fastening piece, 2391 First sheet body, 2392 First connection surface, 2393 External thread, 2394 Second sheet body, 240 Tightening member, 2401 Internal thread, 2402 First pressing surface,

[0054] 241 Second notch, 242 Second fastening piece, 2420 Second connection surface, 2421 First clamping portion, 2422 Third sheet body, 2423 Fourth sheet body, 243 Clamping member, 2431 Second clamping portion, 2432 Second pressing surface,

[0055] 3 Electromagnetic navigation sensor kit, 301 Electromagnetic navigation sensor, 302 Protection tube, 3020 First tube body, 3021 Second tube body, 4 Fixed buckle, 5 Poking card. Specific embodiments

[0056] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will combine the accompanying drawings in the embodiments of the present utility model to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0057] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail the present utility model.

[0058] Different from the puncture under open - abdomen ultrasound guidance, the puncture guided by LUS (laparoscopic ultrasound) neither has a puncture rack and precise guiding wire for guidance, nor a dedicated puncture needle. The operator selects an 18G PTC needle for puncture, but the length of this needle is insufficient for puncturing certain liver segments. The operator needs to perform the puncture manually, and the puncture needle cannot be inserted from any direction and angle. To see the needle track clearly, for the puncture of the intrahepatic portal vein guided by LUS, the puncture should be preferably made from the foot - side to the head - side direction. Determine the puncture point on the liver surface according to the position of the probe, the depth of the duct, and the angle between the puncture needle and the probe. After inserting the needle, withdraw the probe and find the needle track. Adjust the position of the probe with the depth of the inserted needle, and monitor the tip of the needle throughout the process to avoid other important duct structures. When the tip of the needle approaches the portal vein of the target liver segment, when it is possible to simultaneously display the needle track and the target hepatic pedicle by slightly axially rotating the probe, determine the positional relationship between the needle track and the target hepatic pedicle, and judge whether the tip of the needle can further penetrate into the portal vein of the target liver segment.

[0059] In most cases, the LUS probe shows an oblique section of the liver. The clockwise and counterclockwise axial rotations of the probe represent the movement of the scanning plane towards the right foot side and the left head side. Clinically, the needle insertion direction can be judged and adjusted based on this orientation change in combination with the relative positions of the needle track and the target portal vein. If the needle track deviates far from the target portal vein, the needle needs to be withdrawn and a new puncture point on the liver surface should be selected. Adjust and correct repeatedly in this way to accurately penetrate the target portal vein. After withdrawing the needle core, aspirate blood when blood is seen and then inject the corresponding dye. If there is bleeding at the needle insertion point on the liver surface, electrocoagulation can be used to stop the bleeding. Currently, there is already an LUS probe with a puncture channel and a guiding wire. However, since the puncture channel is in the center of the probe and the angle is fixed, it is very difficult for the operator to accurately insert the needle into this channel through abdominal wall puncture. A slight inappropriate angle will cause further difficulty in needle insertion. Since the probe cannot be rotated after the needle is inserted, it is difficult to display the needle track and the needle tip, resulting in a low puncture success rate. Given that the puncture technique for the intrahepatic portal vein under LUS requires high skills, the existing LUS probes and puncture needles far from meet the requirements of surgeons, so this technique is difficult to popularize in a short time and this technique urgently needs to be developed and improved.

[0060] As a necessary supplement to percutaneous ultrasound-guided hepatic tumor ablation, LUS-guided hepatic tumor ablation is visible throughout the process. Using high-frequency ultrasound imaging can not only accurately monitor the needle track in real time and timely handle possible complications during the operation, but also assist in protecting the surrounding organs through instruments to ablate tumors in "dangerous areas" under percutaneous ultrasound, such as the liver surface, the top of the diaphragm, the second hepatic hilum, the caudate lobe of the liver, beside the gallbladder, and the liver surface, etc., thus having better safety and effectiveness. However, due to the occupancy effect of the Trocar, ultrasound probe, and ablation needle outside the abdominal cavity, the puncture under LUS cannot be performed with the needle inserted within the scanning plane of percutaneous ultrasound guidance, and there is an angle between the ultrasound exploration plane and the needle insertion plane. Therefore, it is necessary to slightly rotate the probe axially to adjust the intersection position of the two planes in order to better observe the needle track throughout the process and evaluate the depth and angle of needle insertion, so the puncture difficulty is extremely high and this technique urgently needs to be developed and improved.

[0061] Due to the presence of two "fulcrums" on the abdominal wall and the liver parenchymal surface for the needle track, it is difficult to operate the electrode needle flexibly under laparoscopy. Therefore, surgeons have discussed various technical points. Even with the assistance of LUS during the process of puncturing the liver parenchyma, there will still be a process of repeated punctures to find a suitable path to enter the tumor.

[0062] Therefore, currently, for the positive and reverse staining of the portal vein of the target liver segment during laparoscopic anatomical hepatectomy and the puncture technique of LUS-guided hepatic tumor ablation during the operation, not only do surgeons need to have good three-dimensional anatomy and stereoscopic vision, but also they should master proficient ultrasound operation skills, with very high comprehensive requirements for doctors. It is difficult for doctors to determine the position of the puncture kit (such as the puncture needle) during laparoscopic ultrasound-guided puncture surgery, resulting in difficult puncture.

[0063] To this end, as Figures 2 to 11 shown, an embodiment of the present utility model provides a connection assembly, including: a connecting member 2, the connecting member 2 is used for detachably and fixedly connecting with the front end of the intraoperative ultrasound probe 1, and a avoiding portion 201 for avoiding the transmitting acoustic window 106 of the intraoperative ultrasound probe 1 is arranged on the connecting member 2;

[0064] a mounting member 22, arranged on the connecting member 2, and a mounting portion for mounting the electromagnetic navigation sensor kit 3 is arranged on the mounting member 22.

[0065] In this embodiment, the connection assembly is a structure capable of mounting the electromagnetic navigation sensor kit 3 to the front end of the intraoperative ultrasound probe 1. As Figure 1 shown, the intraoperative ultrasound probe 1 to which the connection assembly is applied includes an acoustic window portion 105, an insertion tube 103, a handle end 101 and a probe wire. Among them, the acoustic window portion 105 is located at the very front end of the entire probe. The acoustic window portion 105 includes a transmitting acoustic window 106. A bending portion 104 is between the acoustic window portion 105 and the insertion tube 103. The acoustic window portion 105 and the bending portion 104 are connected by a rigid joint portion. The probe wire is connected to the rear end of the handle end 101. During use, by operating the handle 102 of the handle end 101, the bending portion 104 can drive the acoustic window portion 105 to bend forward, backward, left, and right.

[0066] In this embodiment, the connection assembly includes a connecting member 2 having a connection function. The connection function of the connecting member 2 is mainly in two aspects. One aspect is that the connecting member 2 can be connected to the front end of the intraoperative ultrasound probe 1, and the other aspect is that the connecting member 2 can be connected to the electromagnetic navigation sensor kit 3. In other words, in this embodiment, the connecting member 2 includes at least two connection ends. One connection end can be connected to the intraoperative ultrasound probe 1, and the other connection end can be connected to the electromagnetic navigation sensor kit 3, so that the electromagnetic navigation sensor kit 3 can be fixed to the front end of the intraoperative ultrasound probe 1 through the connecting member 2.

[0067] On this basis, for the convenience of independently mounting the connecting member 2 to the intraoperative ultrasound probe 1 for use, a detachable connection method is adopted between one connection end of the connecting member 2 and the intraoperative ultrasound probe 1, such as snap connection, bonding, screw connection, etc. The specific connection structure is not limited in this embodiment. Since the connecting member 2 needs to intervene in the human body with the ultrasound probe, the connecting member 2 needs to have the characteristics of biocompatibility and non-magnetism, so as to provide a stable and firm fixing method for the intervention navigation electromagnetic navigation sensor 301 during the operation, so as to bring clear real-time puncture images and help the doctor perform the operation accurately.

[0068] According to the structural characteristics of the intraoperative ultrasound probe 1, as Figure 3As shown in the figure, it has a transmitting acoustic window 106 for transmitting ultrasonic waves on the acoustic window part 105. Therefore, from a structural perspective, the connecting member 2 needs to ensure that after being installed on the intraoperative ultrasound probe 1, it will not affect the normal transmission of ultrasonic waves by the transmitting acoustic window 106. For this purpose, in this embodiment, an avoidance part 201 for avoiding the transmitting acoustic window 106 of the intraoperative ultrasound probe 1 is provided on the connecting member 2.

[0069] In one implementation manner of the avoidance part 201, the avoidance part 201 can be an avoidance groove opened on the connecting member 2, and the position and size of the avoidance groove are designed according to the position and size of the transmitting acoustic window 106, so that the ultrasonic waves transmitted through the transmitting acoustic window 106 can pass through the avoidance groove normally.

[0070] In another implementation manner of the avoidance part 201, by designing the connection position and shape of the connecting member 2, the connecting member 2 does not extend to the position of the transmitting acoustic window 106, so that it will not interfere with the transmission of ultrasonic waves after installation. It should be noted that the above specific description of the avoidance part 201 is not restrictive and can be designed according to actual needs.

[0071] As Figure 4 and Figure 5 shown, since another connection end on the connecting member 2 needs to install the electromagnetic navigation sensor kit 3, in this embodiment, a mounting member 22 is further provided on the connecting member 2, and the mounting member 22 can cooperate with the electromagnetic navigation sensor kit 3 to fix the electromagnetic navigation sensor kit 3 to the connecting member 2.

[0072] There are various connection methods between the mounting member 22 and the electromagnetic navigation sensor kit 3. In one implementation manner, the mounting member 22 can be a groove structure formed on the connecting member 2, and this groove structure can at least partially accommodate the electromagnetic navigation sensor kit 3.

[0073] In another implementation manner, the mounting member 22 can be a clamping structure formed on the connecting member 2, and through this clamping structure, it can be clamped and fixed to the connecting member 2 with the electromagnetic navigation sensor kit 3.

[0074] In yet another implementation manner, the mounting member 22 can be a mounting channel formed on the connecting member 2. The circumferential direction of the mounting channel is closed and both ends are open, and the electromagnetic navigation sensor kit 3 can penetrate into the mounting channel for fixation, etc. In this embodiment, the specific connection method between the mounting member 22 and the electromagnetic navigation sensor kit 3 is not limited and can be designed according to actual needs. Additionally, it should be noted that the position of the mounting member 22 also needs to avoid the transmitting acoustic window 106 to prevent the electromagnetic navigation sensor kit 3 from interfering with the transmission of ultrasonic waves.

[0075] During use, the electromagnetic navigation sensor kit 3 can be first installed on the connecting piece 2, and then the connecting piece 2 can be installed on the front end of the intraoperative ultrasound probe 1. Alternatively, the connecting piece 2 can be first installed on the front end of the intraoperative ultrasound probe 1 by adjusting the structure of the connecting piece 2, and then the electromagnetic navigation sensor kit 3 can be installed on the connecting piece 2. It is also possible to first install the electromagnetic navigation sensor kit 3 at a set position on the intraoperative ultrasound probe 1, and then install the connecting piece 2 on the front end of the intraoperative ultrasound probe 1, and fix the electromagnetic navigation sensor kit 3 simultaneously through the connecting piece 2.

[0076] During the operation, the electromagnetic navigation sensor kit 3 located at the front end of the ultrasound probe can receive electromagnetic signals. After being electrically connected to an external electromagnetic navigation device, the navigation device can determine the spatial position of the electromagnetic navigation sensor kit 3 based on this electromagnetic signal. Through a specific algorithm, it can be converted into the spatial position of the ultrasound probe. After cooperating with the electromagnetic navigation sensor kit on the puncture kit, the positional relationship between the puncture kit and the ultrasound probe can be established, that is, the positional relationship between the puncture kit and the ultrasound image. Finally, the operator can operate the puncture kit for puncture based on this positional relationship.

[0077] Specifically, in this embodiment, since the electromagnetic navigation sensor kit 3 can be fixedly installed on the front end of the intraoperative ultrasound probe 1 by means of the connecting piece 2, the relative position between the intraoperative ultrasound probe 1 and the electromagnetic navigation sensor kit 3 can be determined based on the position of the electromagnetic navigation sensor kit 3. Since this relative position is fixed, a coordinate system with the position of the intraoperative ultrasound probe 1 as the origin or the position of the electromagnetic navigation sensor kit 3 as the origin can be established using this relative position. Then, with the help of the electromagnetic navigation sensor kit on the puncture kit, the position of the puncture kit can be converted into this coordinate system, thereby determining the relative position between the puncture kit and the intraoperative ultrasound probe, that is, the position of the puncture kit in the intraoperative ultrasound probe or the acquired ultrasound image. The operator can perform the puncture operation of the puncture kit based on this position.

[0078] On the one hand, the utility model achieves the purpose of being able to install the electromagnetic navigation sensor kit 3 on the connecting piece 2 by using the mounting member 22, and at the same time, the connecting piece 2 can be installed on the front end of the intraoperative ultrasound probe 1. After cooperating with the electromagnetic navigation sensor kit on the puncture kit, the relative position between the puncture kit and the intraoperative ultrasound probe 1 can be obtained. Thus, in laparoscopic ultrasound-guided puncture surgery, the position of the puncture kit during the puncture process can be clarified, which is convenient for doctors to perform puncture operations and improves the puncture success rate. Furthermore, it solves the problem in the related art that it is difficult to determine the position of the puncture kit in laparoscopic ultrasound-guided puncture surgery, resulting in difficult punctures.

[0079] On the other hand, since the connecting member 2 and the intraoperative ultrasound probe 1 adopt a detachable connection structure, the connecting member is convenient to replace during use. At the same time, in some surgical environments, the connecting member 2 can be removed and the intraoperative ultrasound probe 1 can be used alone, improving the flexibility of surgical operations.

[0080] On the other hand, after the electromagnetic navigation sensor kit 3 is installed on the intraoperative ultrasound probe 1 through the connecting member 2, it can provide a hardware basis for subsequently obtaining the position of the intraoperative ultrasound probe 1.

[0081] According to the structure of the intraoperative ultrasound probe 1, the transmitting window 106 is provided only on one side of the acoustic window portion 105. The devices arranged on the back side of the acoustic window portion 105 and the portions on both sides of the transmitting window 106 on the acoustic window portion 105 will not interfere with the transmitting window 106. Therefore, the position of the mounting member 22 on the connecting member 2 can be selected at a position corresponding to the back side of the transmitting window 106 or on either side adjacent to the two sides of the transmitting window 106.

[0082] In a preferred embodiment, as Figure 4 and Figure 5 shown, the mounting member 22 is located on the back side of the avoiding portion 201, so that the installed electromagnetic navigation sensor kit 3 is located on the back side of the transmitting window 106.

[0083] According to the structure of the intraoperative ultrasound probe 1, the acoustic window portion 105 and the bending portion 104 are provided at the front end of the ultrasound probe. The bending portion 104 is made of a flexible material to meet the bending requirements of the acoustic window portion 105. Since the position of the front end of the ultrasound probe (i.e., the transmitting window 106) needs to be obtained through the electromagnetic navigation sensor kit 3, the electromagnetic navigation sensor kit 3 is preferably relatively fixed to the acoustic window portion 105, that is, during the bending of the acoustic window portion 105, the relative positions of the electromagnetic navigation sensor kit 3 and the transmitting window 106 are fixed.

[0084] For this reason, in this embodiment, the electromagnetic navigation sensor kit 3 needs to be fixed to the acoustic window portion 105 through the connecting member 2. To avoid interference of the connecting member 2 with the bending of the bending portion 104, in this embodiment, after the connecting member 2 is connected to the acoustic window portion 105, it needs to be located at the front end of the bending portion 104 so that the connecting member 2 can bend with the acoustic window portion 105 (as Figure 12 shown), so that the relative positions of the electromagnetic navigation sensor kit 3 and the transmitting window 106 are fixed.

[0085] In one embodiment, the distance between the rear end of the connecting member 2 and the front end of the bending portion 104 is 2-6 mm, further preferably 3-4 mm, and still further preferably 3 mm.

[0086] In a connection mode between the connector 2 and the intraoperative ultrasound probe 1, the connector 2 is connected to the front end of the intraoperative ultrasound probe 1 by snap connection. Specifically, in this embodiment, as Figure 4 and Figure 5 shown, the connector 2 includes a snap main body 21 for snap-connecting to the front end of the intraoperative ultrasound probe 1, and a mounting member 22 is provided inside the snap main body 21.

[0087] In this embodiment, the snap main body 21 can be snap-connected to the front end of the intraoperative ultrasound probe 1, facilitating the installation and disassembly of the snap main body 21. In a specific connection mode, corresponding snap structures can be provided on both the snap main body 21 and the intraoperative ultrasound probe 1, and the snap connection is achieved through the cooperation of the two snap structures (such as the cooperation of a snap projection and a slot, etc.). In another specific connection mode, only the snap structure can be provided on the snap main body 21, and the intraoperative ultrasound probe 1 remains unchanged. The snap main body 21 is fixed only through the cooperation of the snap structure on the snap main body 21 and the intraoperative ultrasound probe 1. To reduce the use cost, it is preferably the method of only providing the snap structure on the snap main body 21 and leaving the intraoperative ultrasound probe 1 unchanged. In this embodiment, the snap structure of the snap main body 21 also has various setting methods. For example, the snap structure can be tightened on the intraoperative ultrasound probe 1 through its own elastic deformation, or a structure capable of applying a tightening force (such as a hoop-like structure) is additionally arranged on the snap structure, etc. This embodiment does not limit it here.

[0088] Based on the above embodiment, as Figure 5 shown, the mounting member 22 is a slot member 221 provided at the inner bottom of the snap main body 21, and the mounting portion is a mounting groove 220 provided on the slot member 221 for mounting the electromagnetic navigation sensor kit 3.

[0089] Specifically, it should be noted that the slot member 221 in this embodiment can be installed as an independent structure at the inner bottom of the snap main body 21, or can be a structure directly formed at the inner bottom of the snap main body 21. The mounting groove 220 formed on the slot member 221 can at least partially accommodate the electromagnetic navigation sensor kit 3, and preferably can fully accommodate the signal receiving end of the electromagnetic navigation sensor kit 3. The contour and size of the mounting groove 220 need to be adapted to the electromagnetic navigation sensor kit 3 to be installed, and its specific size is not limited in this embodiment.

[0090] Based on the above embodiment, as Figure 5As shown, the card slot member 221 is preferably installed in the buckle body 21 as an independent structure. Therefore, to facilitate the installation of the card slot member 221, a card slot 202 is provided on the inner side of the buckle body 21 in this embodiment, and the card slot member 221 is installed in the card slot 202. The card slot 202 forms a working channel for accommodating the sensor kit composed of the card slot member 221 and the electromagnetic navigation sensor kit 3. The specific structure of the card slot 202 is adapted to the structure of the card slot member 221, so that the card slot member 221 can be installed in the card slot 202. In one embodiment, the card slot 202 is a long strip-shaped groove, and correspondingly, the card slot member 221 is a long strip-shaped structure, and at least part of it can be inserted into the card slot 202. To reduce the occupied space, it is preferably that the card slot member 221 can be completely inserted into the card slot 202.

[0091] In one embodiment of the electromagnetic navigation sensor kit 3, as Figure 8 shown, the electromagnetic navigation sensor kit 3 includes an electromagnetic navigation sensor 301 and a protective tube 302. The electromagnetic navigation sensor 301 needs to be installed in the protective tube 302 for use. The protective tube 302 can be a nickel-titanium protective tube. The electromagnetic navigation sensor 301 is installed in the protective tube 302, and then the protective tube 302 is installed in the card slot member 221. The electromagnetic navigation sensor 301, the protective tube 302 and the card slot member 221 can form a sensor kit. After installation, the outer side of the protective tube 302 is fitted and installed in the installation slot 220, and the depth of the installation slot 220 is greater than or equal to the outer diameter of the protective tube 302.

[0092] In one embodiment, as Figure 5 shown, the front end of the installation slot 220 is a closed structure, and the rear end of the installation slot 220 is an open structure. The front end of the electromagnetic navigation sensor 301 body extends out of the protective tube 302 and abuts against the inner front side of the closed structure.

[0093] It should be noted that the protective tube 302 can be a nickel-titanium protective tube. Of course, the material for making the protective tube 302 is not limited to nickel-titanium material, and one or a combination of titanium alloy or PI tube can also be selected according to needs.

[0094] In one embodiment of the sensor kit, as Figure 8 and Figure 9 shown, two nickel-titanium protective tubes 302 that make up the sensor kit are provided, namely a first tube body 3020 and a second tube body 3021. The outer diameter of the first tube body 3020 is smaller than the inner diameter of the second tube body 3021. The first tube body 3020 can be movably sleeved in the second tube body 3021, and the electromagnetic navigation sensor 301 can be installed in the first tube body 3020.

[0095] In this embodiment, the front end of the second tube body 3021 is located behind the mounting member 22, and the front end of the first tube body 3020 extends to the second tube body 3021 and is installed in the installation groove 220. The length by which the first tube body 3020 extends out of the second tube body 3021 is greater than the length of the bending portion 104 on the intraoperative ultrasound probe 1.

[0096] Specifically, the front end of the first tube body 3020 extends to a position close to the front end of the electromagnetic navigation sensor 301, and the front end of the second tube body 3021 extends to a position close to the rear end of the bending portion 104 of the intraoperative ultrasound probe 1, that is, the length of the second tube body 3021 is significantly shorter than the length of the first tube body 3020. The front end of the first tube body 3020, the front end of the electromagnetic navigation sensor 301, and the acoustic window portion 105 of the intraoperative ultrasound probe 1 are relatively fixed, and the three can be bent synchronously. The second tube body 3021 is relatively fixed to the part of the intraoperative ultrasound probe 1 located behind the bending portion 104. Therefore, for the electromagnetic navigation sensor 301 and the first tube body 3020, when they are bent, they will move linearly relative to the second tube body 3021, and their movement process will not affect the second tube body 3021.

[0097] As Figures 9 to 11 shown, the tail end of the electromagnetic navigation sensor 301 can be fixed to the wire harness of the intraoperative ultrasound probe 1, and a reserve amount for displacement changes caused by the bending of the acoustic window portion 105 is reserved at an appropriate position (such as the ultrasound handle 102). Therefore, overall, when the acoustic window portion 105 is bent, the front end of the electromagnetic navigation sensor 301 located at the lower end of the acoustic window portion 105 does not change its relative position. The tail end of the electromagnetic navigation sensor 301 fixed to the wire harness also does not change its relative position. In the intermediate stage, it moves back and forth in the channel established by the second tube body 3021. In one embodiment, the left and right bending displacement amounts of the acoustic window portion 105 are the same, the maximum displacement amount is 0.9 cm; the maximum forward bending displacement amount is 2.5 cm; the maximum backward bending displacement amount is 1.1 cm.

[0098] Since the electromagnetic navigation sensor 301 includes a cable part, the cable part needs to extend to the tail end of the intraoperative ultrasound probe 1. Correspondingly, the first tube body 3020 and the second tube body 3021 also need to extend towards the rear end, so that the cable part of the electromagnetic navigation sensor 301, the rear end part of the first tube body 3020, and the second tube body 3021 will be located behind the buckle body 21, that is, the buckle body 21 cannot play the role of connecting this part to the intraoperative ultrasound probe 1. Therefore, in order to facilitate connecting this part to the intraoperative ultrasound probe 1 to improve the use stability and convenience, several fixing buckles 4 are also provided in this embodiment. The fixing buckles 4 can be snapped onto the intraoperative ultrasound probe 1, and the fixing buckles 4 can be elastic C-shaped fasteners. The fixing buckles 4 can be arranged starting from the rear end of the bending part 104 of the intraoperative ultrasound probe 1 to avoid affecting the bending of the bending part 104. Several fixing buckles can be arranged along the cable part of the electromagnetic navigation sensor 301, the rear end part of the first tube body 3020, and the second tube body 3021.

[0099] In one implementation manner, the size of the buckle body 21 and the size of the electromagnetic navigation sensor kit 3 mentioned in the above implementation manner need to be applicable to the trocar 5 (also called a puncture cannula) with a size specification of 12.5 mm. Under the size limitation of the trocar 5, there are certain requirements for the structure of the buckle body 21, the connection structure between the buckle body 21 and the intraoperative ultrasound probe 1, the structure of the electromagnetic navigation sensor kit 3, and the connection structure between the electromagnetic navigation sensor kit 3 and the buckle body 21. On the premise of ensuring that it can pass through the trocar 5, the corresponding structural parts need to have sufficient structural strength and connection stability. The assembly process of the intraoperative ultrasound probe 1 with the connector 2 and the electromagnetic navigation sensor kit 3 and the trocar 5 is as Figure 13 and Figure 14 shown.

[0100] After the buckle body 21 is connected to the intraoperative ultrasound probe 1, it should be firmly fixed to the probe and cannot rotate, shift, etc., to avoid affecting the parameters of the electromagnetic navigation sensor kit 3 that have been debugged. In this embodiment, the buckle body 21 is used for sleeving and fixing on the acoustic window part 105. To improve the connection firmness, the inner wall of the buckle body 21 fits on the outer wall of the acoustic window part 105. The first end of the buckle body 21 is limitedly connected to the front end of the acoustic window part 105, and the second end of the buckle body 21 has an opening for sleeving and fixing to the rear end of the acoustic window part 105.

[0101] Specifically, in this embodiment, as Figure 8As shown, the overall shape of the buckle body 21 is similar to that of the sound window portion 105. The inner contour thereof needs to be adapted to fit the outer side of the sound window portion 105, so as to reduce the overall volume while improving the connection firmness. In addition, to prevent relative axial movement between the buckle body 21 and the sound window portion 105, the buckle body 21 needs to have a corresponding limiting structure. In this embodiment, the first end of the buckle body 21 is connected to the front end of the sound window portion 105 in a limiting manner. Specifically, a plurality of limiting pieces may be formed at the first end of the buckle body 21. The limiting pieces are located at the front end of the sound window portion 105 and abut against the sound window portion 105, thereby restricting the backward movement of the buckle body 21 relative to the sound window portion 105. Alternatively, the outer front end of the buckle body 21 may be a closed surrounding structure 205. The surrounding structure 205 is used to surround the front end of the intraoperative ultrasound probe 1. By surrounding the front end of the sound window portion 105 (i.e., the front end of the intraoperative ultrasound probe 1) with the surrounding structure 205, a limiting effect is achieved.

[0102] Since the buckle body 21 also needs to be inserted into the human body, in order to avoid harm to the body, the first end of the buckle body 21 may be a dome-shaped closed structure, that is, the outer front side of the surrounding structure 205 is an arc surface. In some embodiments, the outer front side of the surrounding structure 205 may also be other structural forms, and the present application does not limit it here. On this basis, the inner front side of the surrounding structure 205 is matched with the front end of the intraoperative ultrasound probe 1, so that the inner front side of the surrounding structure 205 can fit on the front end of the intraoperative ultrasound probe 1, and at the same time play a limiting and fastening role.

[0103] The axial position of the card slot 202 on the buckle body 21 will affect the axial position of the card slot member 221, and thus affect the axial position of the electromagnetic navigation sensor kit 3. In one embodiment, as Figure 8 shown, the card slot 202 is arranged such that after the card slot member 221 is connected to the card slot 202, the front end of the electromagnetic navigation sensor kit 3 installed in the card slot member 221 is axially shorter than the front end of the transmitting sound window 106. Specifically, the axial position of the electromagnetic navigation sensor kit 3 may be approximately at the 1 / 2 length from the front end of the transmitting sound window 106, or may be at about 1 / 3 or 1 / 4 from the front end. The present utility model does not make a special limitation thereto.

[0104] The position selection of the electromagnetic navigation sensor kit 3 is mainly determined based on whether the transmitting sound window 106 of the intraoperative ultrasound probe 1 will interfere with the signal transmission of the electromagnetic navigation sensor kit 3. When the transmitting sound window 106 does not interfere with the electromagnetic navigation sensor kit 3, the position of the electromagnetic navigation sensor kit 3 is diversified. In this embodiment, it is preferably located at the 1 / 2 position of the transmitting sound window 106, which is convenient for calibration and calculation. When the transmitting sound window 106 interferes with the electromagnetic navigation sensor kit 3, the electromagnetic navigation sensor kit 3 needs to extend to the front end of the transmitting sound window 106, and the corresponding card slot member 221 needs to extend to the front end of the transmitting sound window 106.

[0105] Since the card slot member 221 is a structure independently installed in the buckle body 21, in order to avoid axial relative movement between the card slot member 221 and the buckle body 21, as Figure 5 shown, in this embodiment, a first limiting structure 203 is further provided at the inner bottom of the buckle body 21, and a second limiting structure 222 is provided on the card slot member 221 and assembled with the first limiting structure 203. The axial movement of the card slot member 221 in the card slot 202 is restricted by the cooperation of the first limiting structure 203 and the second limiting structure 222.

[0106] Specifically, in order to restrict the axial movement of the card slot member 221 in the card slot 202, the first limiting structure 203 and the second limiting structure 222 can adopt a radial cooperation method. In one embodiment, the first limiting structure 203 is a limiting groove opened in the buckle body 21, and the second limiting structure 222 is a limiting protrusion provided on the card slot member 221; and / or,

[0107] the first limiting structure 203 is a limiting protrusion opened in the buckle body 21, and the second limiting structure 222 is a limiting groove provided on the card slot member 221. In this embodiment, the positions of the limiting groove and the limiting protrusion are not limited, as long as the limiting groove can match the limiting protrusion.

[0108] In one embodiment, the first limiting structure 203 is a limiting groove opened in the buckle body 21, and the second limiting structure 222 is a limiting protrusion provided on the card slot member 221;

[0109] The limiting groove is located on both sides of the card slot 202 and communicates with the card slot 202, and the limiting protrusion is provided on both sides of the card slot member 221 and corresponds to the limiting groove.

[0110] In this embodiment, the axial movement and offset of the card slot member 221 can be better restricted by the cooperation of the limiting grooves and limiting protrusions on both sides, thereby improving the firmness of the card slot member 221 after installation.

[0111] In another embodiment, the limiting grooves are arranged as a plurality of slot holes spaced apart and distributed within the buckle body 21, and the limiting portions are a plurality of convex points spaced apart and distributed on the slot member 221, with the convex points corresponding to the slot holes.

[0112] In this embodiment, the slot holes can be formed at the bottom of the slot 202, and correspondingly, the convex points are formed at the bottom of the slot member 221. The slot holes are arranged as a plurality and can be distributed in an array or in a triangular pattern, etc., and the convex points have the same distribution pattern. The cooperation of the slot holes and the convex points serves to limit the slot member 221.

[0113] Since the buckle body 21 needs to enter the body along with the ultrasonic probe, in order to prevent body fluids from entering the slot 202 and causing the slot member 221 and the slot 202 to adhere, making it difficult to remove the slot member 221, as Figure 4 and Figure 5 shown, in this embodiment, a disassembly hole 204 is provided at the bottom of the buckle body 21. The disassembly hole 204 is communicated with the slot 202 and is used for a disassembly tool to pass through to remove the slot member 221. The hole can be a round hole or a square hole, etc.

[0114] On the basis of providing an avoidance portion 201 on the buckle body 21 to avoid interference with the transmitting acoustic window 106, to prevent affecting the fitting of the acoustic window to the viscera and causing adverse effects on the ultrasonic image operation, as Figure 7 shown, the upper end surface of the buckle body 21 in this embodiment is flush with or lower than the upper end surface of the transmitting acoustic window 106.

[0115] To reduce the use cost, in this embodiment, an implementation mode is adopted in which only the buckle body 21 is improved so that it can be fixed to the acoustic window portion 105. Therefore, to firmly fix the buckle actively, as Figure 6 shown, in this embodiment, a fastening structure 23 is provided at the second end of the buckle body 21, and the fastening structure 23 is used to fasten the buckle body 21 to the acoustic window portion 105.

[0116] In this embodiment, the fastening structure 23 has various forms. In one embodiment, the fastening structure 23 can be an elastically deformable structure on the buckle body 21 that is connected to the acoustic window portion 105. In another embodiment, the fastening structure 23 can be a clamping structure similar to a hoop. In yet another embodiment, the fastening structure 23 can be a structure similar to a bolt, etc.

[0117] In one embodiment of the fastening structure 23, as Figure 15 and Figure 16As shown, the buckle body 21 is arranged as a quasi-cylindrical thin-walled structure, and the second end of the buckle body 21 is arranged as a near-circular ring structure. The fastening structure 23 includes a deformation wide groove 230 opened at the second end of the buckle body 21. Through the deformation wide groove 230, the opening can be allowed to generate elastic deformation to tightly fit an intraoperative ultrasonic probe 1 within a certain outer diameter range.

[0118] Specifically, when the second end of the buckle body 21 is sleeved on the acoustic window part 105, through the deformation wide groove 230, the second end of the buckle body 21 can generate a certain amount of elastic deformation under the pressure of the acoustic window part 105, so as to tightly hold on the acoustic window part 105. Through the deformation wide groove 230, the deformation amount of the second end of the buckle body 21 can also be increased, enabling it to adapt to ultrasonic probes of more sizes. It should be noted that the deformation wide groove 230 can be set to one, or can also be set to multiple. Of course, the more the number of the deformation wide grooves 230 and the larger the width, the easier it is for the second end of the buckle body 21 to generate greater elastic deformation, but its fastening ability also decreases accordingly. Therefore, the number and width of the deformation wide grooves 230 can be reasonably selected. In one embodiment, the deformation wide groove 230 is one, and the width is 3 mm.

[0119] Since the buckle body 21 is provided with an avoidance groove, on this basis, in order to enable the second end of the buckle body 21 to have better deformation ability, the two ends of the deformation wide groove 230 in this embodiment are respectively communicated with the avoidance groove and the end of the buckle body 21. Further, in order to ensure the fastening ability of the second end of the buckle body 21, the width of the deformation wide groove 230 is smaller than the width of the avoidance groove, and the deformation wide groove 230 corresponds to the middle of the avoidance groove.

[0120] On the basis of setting the deformation wide groove 230, in order to further improve the connection firmness between the buckle body 21 and the acoustic window part 105, the fastening structure 23 in this embodiment further includes an adhesive. The adhesive is adhesively wound around the second end of the buckle body 21 for pressing and fitting the second end of the buckle body 21 on the acoustic window part 105. The adhesive can be a medical tape.

[0121] In this embodiment, as Figure 17 shown, the card slot 202 in the buckle body 21 is a strip-shaped structure, and correspondingly, the card slot part 221 is also a strip-shaped structure.

[0122] The buckle body 21 can be processed from TC4 (titanium 4) material. It has been verified that the TC4 material can be used as an implant material, meeting medical conditions such as biocompatibility. After testing, it has no interference or weakening effect on the signals of the intervention navigation system and will not cause adverse effects. At the same time, the TC4 material can withstand various conventional sterilization forms in hospitals and departments, such as ultraviolet rays, high temperature and high pressure, low temperature plasma, etc., and will not cause adverse changes.

[0123] In another embodiment of the fastening structure 23, asFigure 18 and Figure 19 As shown, the buckle body 21 is configured as a cylindrical thin-walled structure, and the fastening structure 23 includes a first opening structure 231 provided at the second end of the buckle body 21, and the first opening structure 231 is configured as an arc-like shape, and the first opening structure 231 is used to fit on the first side of the acoustic window portion 105;

[0124] The fastening structure 23 further includes a first fastening buckle 232, and the inner surface of the first fastening buckle 232 can be attached to the second side of the acoustic window portion 105;

[0125] The first end of the first fastening buckle 232 is hinged to the first side of the first opening structure 231 , and the second end of the first fastening buckle 232 is buckled to the second side of the first opening structure 231 .

[0126] Specifically, in this embodiment, when the buckle body 21 is installed, the first opening structure 231 is firstly made to fit with the first side of the acoustic window portion 105, and then the first fastening buckle 232 is rotated to cover the second side of the acoustic window portion 105, and the first fastening buckle 232 is pressed to be connected with the second side of the first opening structure 231, so as to hold the acoustic window portion 105 tightly. To improve the connection tightness, the inner surface of the first opening structure 231 fits with the outer surface of the first side of the acoustic window portion 105, and the inner surface of the first fastening buckle 232 fits with the outer surface of the second side of the acoustic window portion 105. The first end of the first fastening buckle 232 can be hinged with the first side of the first opening structure 231 through a rotating shaft structure, or the first fastening buckle 232 can be thinned at the connection to form a fold by utilizing its own material characteristics, and the first fastening buckle 232 can be rotated by utilizing the fold. In order to enable the first fastening buckle 232 to be snap-connected with the second side of the first opening structure 231 , the second end of the first fastening buckle 232 and the second side of the first opening structure 231 may be provided with corresponding snap-connection structures.

[0127] In this embodiment, by providing a first fastening buckle 232 that can be opened and closed at the second end of the buckle body 21, it is possible to facilitate the connection between the buckle body 21 and the acoustic window portion 105, and it is also convenient to fasten the buckle body 21 and the acoustic window portion 105 after the connection. When disassembling, it is only necessary to press the first fastening buckle 232 to disengage it from the buckle connection with the second side of the first opening structure 231, and then open the first fastening buckle 232, which is convenient for disassembly.

[0128] In a buckle connection structure between the first fastening buckle 232 and the first opening structure 231, as Figure 18 and Figure 19 As shown, a first locking protrusion 2320 is disposed on the outer side of the second end of the first fastening buckle 232 , and a first locking groove 2310 that is buckled and connected to the first locking protrusion 2320 is disposed on the inner side of the first opening structure 231 .

[0129] Specifically, it should be noted that during snap connection, the first snap projection 2320 is pressed and deformed inwardly, so as to snap into the first snap groove 2310. When disassembly is required, the first snap projection 2320 also needs to be pressed to deform it inwardly to disengage from the first snap groove 2310.

[0130] In another snap connection structure, the first snap projection 2320 can be arranged on the inner side of the first fastening snap 232, and correspondingly, the first snap groove 2310 is located on the outer side of the first opening structure 231. After adopting this connection structure, the end face of the first fastening snap 232 may protrude from the outer surface of the first opening structure 231, resulting in an uneven surface of the snap body 21 and being prone to damage human tissues. Therefore, it is preferably to arrange the first snap projection 2320 on the outer side of the first fastening snap 232 and arrange the first snap groove 2310 on the inner side of the first opening structure 231.

[0131] To improve the connection strength between the first snap projection 2320 and the first snap groove 2310, in this embodiment, the first snap groove 2310 needs to have a certain depth, so as to increase the contact area between the first snap groove 2310 and the first snap projection 2320. Therefore, as Figure 18 shown, the first snap groove 2310 in this embodiment includes a first groove body 23101 that penetrates the side wall of the first opening structure 231 in the radial direction. The protruding height of the first snap projection 2320 is less than or equal to the depth of the first groove body 23101, so that the first snap projection 2320 can be completely snapped into the first snap groove 2310, maintaining sufficient snap strength, and at the same time avoiding the first snap projection 2320 protruding out of the first groove body 23101 and causing protrusions on the surface of the snap body 21 to damage human tissues.

[0132] On the basis of the above implementation manner, to facilitate the first snap projection 2320 to snap into the first groove body 23101, in this embodiment, the first snap groove 2310 further includes a second groove body 23102. The second groove body 23102 and the first groove body 23101 are distributed along the snapping direction of the first snap projection 2320. The second groove body 23102 is opened on the side wall of the first opening structure 231, and both sides of the second groove body 23102 are respectively communicated with the first groove body 23101 and the end face of the first opening structure 231, forming a snapping channel for the first snap projection 2320 through the second groove body 23102;

[0133] The depth of the second groove body 23102 is less than the depth of the first groove body 23101, and the protruding height of the first snap projection 2320 is greater than the depth of the second groove body 23102 and less than or equal to the depth of the first groove body 23101.

[0134] In this embodiment, the second groove 23102 does not penetrate the side wall of the first opening structure 231 in the radial direction. Therefore, its depth is less than that of the first groove 23101. However, at the same time, the wall thickness of the corresponding part of the first opening structure 231 to the second groove 23102 is reduced, so that the deformation amount of the first clamping protrusion 2320 when it is clamped into the second groove 23102 is reduced, which is beneficial to smoothly clamping the first clamping protrusion 2320 into the first groove 23101. Since the opening of the second groove 23102 may cause the area of the surface of the first groove 23101 that abuts against the first clamping protrusion 2320 to decrease, in this case, to ensure that the first clamping protrusion 2320 can be smoothly clamped with the first groove 23101, the protruding height of the first clamping protrusion 2320 is greater than the depth of the second groove 23102. At the same time, to prevent the first clamping protrusion 2320 from protruding out of the first groove 23101, the protruding height of the first clamping protrusion 2320 is also less than or equal to the depth of the first groove 23101.

[0135] On this basis, to further facilitate the clamping of the first clamping protrusion 2320 into the first groove 23101, the surface of the second groove 23102 for guiding the first clamping protrusion 2320 can be an inclined surface, so that the side wall thickness of the first opening structure 231 corresponding to the part of the first groove 23101 gradually increases along the clamping direction, thereby ensuring the smooth clamping of the first clamping protrusion 2320 while increasing the contact area between the first clamping protrusion 2320 and the first groove 23101, and improving the connection stability.

[0136] Of course, optionally, the outer side surface of the first clamping protrusion 2320 can also be set as a clamping inclined surface, and the clamping inclined surface is used to guide the first clamping protrusion 2320 to generate deformation, so as to smoothly clamp into the first groove 23101.

[0137] In one embodiment, the height of the first clamping protrusion 2320 is 2 mm to ensure the strength of the first clamping protrusion 2320, and the angle of the clamping inclined surface is 10°.

[0138] To make the surface of the buckle body 21 relatively flat after installation, in this embodiment, the outer surface of the first fastening buckle 232 and the outer surface of the first opening structure 231 are located on the same circumferential surface, that is, after the first fastening buckle 232 and the first opening structure 231 are buckled, the outer surface of the first fastening buckle 232 and the outer surface of the first opening structure 231 can be flush.

[0139] Such as Figure 18As shown, for the convenience of snap connection between the first fastening buckle 232 and the first opening structure 231, in this embodiment, an arc-shaped first connecting strip 2321 is provided at the second end of the first fastening buckle 232. The first connecting strip 2321 is arranged in a U-shaped structure, and the first clamping protrusion 2320 is provided at the end of the first connecting strip 2321. Specifically, in this embodiment, the width of the first connecting strip 2321 is smaller than the width of the first fastening buckle 232, so that it can better generate deformation to facilitate the first clamping protrusion 2320 to be snapped into the first clamping groove 2310.

[0140] On this basis, the inner surface of the first connecting strip 2321 and the inner surface of the first fastening buckle 232 are located on the same circumferential surface, so that the connecting strip can also fit on the surface of the sound window part 105. The thickness of the first connecting strip 2321 is smaller than the thickness of the first fastening buckle 232, making the first connecting strip 2321 more likely to generate deformation, thereby further facilitating the first clamping protrusion 2320 to be snapped into the first clamping groove 2310.

[0141] To ensure the connection strength of the snap connection, in this embodiment, the first connecting strips 2321 are arranged in a plurality of axially spaced distributions, and the first clamping protrusions 2320 are provided at the ends of each of the first connecting strips 2321. When the first connecting strips 2321 are arranged in a spaced distribution, the deformation processes between the first connecting strips 2321 do not interfere with each other, and at the same time, a plurality of first clamping protrusions 2320 are provided to ensure the connection strength.

[0142] In this embodiment, the buckle body 21 and the first fastening buckle 232 can be made of medical PP material and processed by injection molding. PP plastic is colorless, odorless, and non-toxic, and can be sterilized at temperatures above 100°C or can withstand low-temperature plasma sterilization. At the same time, the PP material has good flexibility and can accept repeated bending.

[0143] In another embodiment of the fastening structure 23, as Figure 20 and Figure 21 shown, the fastening structure 23 includes an arc-shaped second opening structure 237 provided at the second end of the buckle body 21, and the second opening structure 237 is used to fit on the first side of the sound window part 105;

[0144] The fastening structure 23 further includes a second fastening buckle 233 and a third fastening buckle 234, and the inner surfaces of the second fastening buckle 233 and the third fastening buckle 234 can fit on the second side of the sound window part 105;

[0145] The first end of the second fastening buckle 233 is hinged to the first end of the second opening structure 237, and an elastic member 236 is provided between the side walls of the second fastening buckle 233 and the second opening structure 237, and a force for rotating the second fastening buckle 233 away from the fastening direction is applied through the elastic member 236;

[0146] The first end of the third fastening buckle 234 is hinged to the second end of the second opening structure 237, and the second end of the second fastening buckle 233 is snap-connected to the second end of the third fastening buckle 234.

[0147] In this embodiment, when the buckle body 21 is installed, first, the connection between the second fastening buckle 233 and the third fastening buckle 234 is released. The inner side of the second opening structure 237 is attached to the first side of the sound window portion 105, and then the second fastening buckle 233 is rotated to make it fit on the surface of the sound window portion 105. Immediately afterwards, the third fastening buckle 234 is rotated. By pressing the third fastening buckle 234, it is snap-connected to the second side of the second fastening buckle 233, thereby clamping the sound window portion 105. During this process, the elastic member 236 undergoes elastic deformation. When it is necessary to disassemble the buckle body 21, the third fastening buckle 234 can be rotated outwards to disengage it from the second fastening buckle 233. At this time, the second fastening buckle 233 automatically rotates outwards and opens under the elastic force of the elastic member 236.

[0148] To improve the connection tightness, the inner surface of the second opening structure 237 is attached to the outer surface of the first side of the sound window portion 105, and the inner surfaces of the second fastening buckle 233 and the third fastening buckle 234 are attached to the outer surface of the second side of the sound window portion 105. The first end of the second fastening buckle 233 and the first side of the second opening structure 237 can be hinged through a shaft-like structure, or by using the material characteristics of itself, the connection part is thinned to form a crease, and the second fastening buckle 233 can rotate using this crease. The third fastening buckle 234 is arranged in the same way and will not be elaborated here.

[0149] To enable the second fastening buckle 233 to be snap-connected to the second side of the third fastening buckle 234, corresponding snap structures can be provided at the second end of the second fastening buckle 233 and the second side of the third fastening buckle 234.

[0150] In a hinging manner between the second fastening buckle 233 and the second opening structure 237, the first end of the second fastening buckle 233 is hinged to the first end of the second opening structure 237 through a rotating shaft, and the rotation performance of the second fastening buckle 233 can be ensured through the rotating shaft. Similarly, the third fastening buckle 234 can also be hinged to the second end of the second opening structure 237 through a rotating shaft. Since the second fastening buckle 233 needs to have a force to rotate away from the fastening direction through the elastic member 236, in order to enable the elastic member 236 to better exert this rotating force, the elastic member 236 in this embodiment is a torsion spring sleeved on the rotating shaft, and the two legs of the torsion spring are respectively connected to the side walls of the second fastening buckle 233 and the second opening structure 237.

[0151] To ensure the surface flatness of the buckle body 21 after installation, in this embodiment, the outer surfaces of the second fastening buckle 233, the third fastening buckle 234, and the second opening structure 237 are located on the same circumferential surface.

[0152] In a snap connection structure of the second fastening buckle 233 and the third fastening buckle 234, as Figure 20 shown, a second clamping protrusion 2332 is provided on the outer side of the second end of the second fastening buckle 233, and a second clamping groove 2341 for snap connection with the second clamping protrusion 2332 is provided on the inner side of the third fastening buckle 234.

[0153] Specifically, it should be noted that during snap connection, the second clamping protrusion 2332 is pressed and deformed inward, so as to be snapped into the second clamping groove 2341. When disassembly is required, the second clamping protrusion 2332 also needs to be pressed to deform it inward to disengage from the second clamping groove 2341.

[0154] In another snap connection structure, the second clamping protrusion 2332 can be provided on the inner side of the second fastening buckle 233, and correspondingly, the second clamping groove 2341 is located on the outer side of the third fastening buckle 234. After adopting this connection structure, the end face of the second fastening buckle 233 may protrude from the outer surface of the third fastening buckle 234, resulting in an uneven surface of the buckle body 21 and being likely to damage human tissues. Therefore, it is preferably to set the second clamping protrusion 2332 on the outer side of the second fastening buckle 233 and set the second clamping groove 2341 on the inner side of the third fastening buckle 234.

[0155] To improve the connection strength between the second clamping protrusion 2332 and the second clamping groove 2341, in this embodiment, the second clamping groove 2341 needs to have a certain depth, so as to increase the contact area between the second clamping groove 2341 and the second clamping protrusion 2332. Therefore, the second clamping groove 2341 in this embodiment includes a third groove body that penetrates the side wall of the third fastening buckle 23 in the radial direction. The protruding height of the second clamping protrusion 2332 is less than or equal to the depth of the third groove body, so that the second clamping protrusion 2332 can be completely snapped into the second clamping groove 2341, maintaining sufficient clamping strength, and at the same time avoiding the second clamping protrusion 2332 protruding from the third groove body and causing protrusions on the surface of the buckle body 21 to damage human tissues.

[0156] Based on the above embodiments, to facilitate the insertion of the second engaging protrusion 2332 into the third groove, in this embodiment, the second engaging groove 2341 further includes a fourth groove. The fourth groove and the third groove are distributed along the insertion direction of the second engaging protrusion 2332. The fourth groove is formed on the side wall of the third fastening buckle 234, and both sides of the fourth groove communicate with the end faces of the third groove and the third fastening buckle 234 respectively, forming an insertion channel for the second engaging protrusion 2332 through the fourth groove;

[0157] The depth of the fourth groove is less than that of the third groove, and the protruding height of the second engaging protrusion 2332 is greater than the depth of the fourth groove and less than or equal to the depth of the third groove.

[0158] In this embodiment, the fourth groove does not penetrate the side wall of the third fastening buckle 234 in the radial direction, so its depth is less than that of the fourth groove. However, at the same time, the wall thickness of the corresponding part of the third fastening buckle 234 where the fourth groove is located is reduced, so that the deformation amount of the second engaging protrusion 2332 when it is inserted into the fourth groove is reduced, which is beneficial to smoothly inserting the second engaging protrusion 2332 into the third groove. Since the surface of the third groove that abuts against the second engaging protrusion 2332 may be reduced after the fourth groove is formed, in this case, to ensure that the second engaging protrusion 2332 can be smoothly engaged with the third groove, the protruding height of the second engaging protrusion 2332 is greater than the depth of the fourth groove. At the same time, to prevent the second engaging protrusion 2332 from protruding out of the third groove, the protruding height of the second engaging protrusion 2332 is also less than or equal to the depth of the third groove.

[0159] On this basis, to further facilitate the insertion of the second engaging protrusion 2332 into the third groove, the surface of the fourth groove for guiding the second engaging protrusion 2332 can be an inclined surface, so that the side wall thickness of the third fastening buckle 234 corresponding to the part of the third groove gradually increases along the insertion direction, which can ensure the smooth insertion of the second engaging protrusion 2332 while increasing the contact area between the second engaging protrusion 2332 and the third groove, improving the connection stability.

[0160] Of course, optionally, the outer side surface of the second engaging protrusion 2332 can also be set as an engaging inclined surface, and the engaging inclined surface is used to guide the second engaging protrusion 2332 to deform, so as to be smoothly inserted into the third groove.

[0161] To facilitate the snap connection between the second fastening buckle 233 and the third fastening buckle 234, as Figure 20As shown, an arc-shaped second connecting bar 2331 is provided at the second end of the second fastening buckle 233, and a second clamping protrusion 2332 is provided at the end of the second connecting bar 2331. Specifically, in this embodiment, the width of the second connecting bar 2331 is smaller than the width of the second fastening buckle 233, so that deformation can be better generated to facilitate the second clamping protrusion 2332 to be clamped into the second clamping groove 2341.

[0162] Furthermore, the inner surface of the second connecting bar 2331 and the inner surface of the second fastening buckle 233 are located on the same circumferential surface. The thickness of the second connecting bar 2331 is smaller than the thickness of the second fastening buckle 233, and the width of the second connecting bar 2331 is smaller than the width of the second fastening buckle 233.

[0163] To facilitate the hinging of the second fastening buckle 233 and the third fastening buckle 234 on the second opening structure 237, in this embodiment, arc-shaped connecting grooves 235 are provided at both the first end and the second end of the second opening structure 237. The first end of the second fastening buckle 233 is embedded in the corresponding arc-shaped connecting groove 235 and hinged through a rotating shaft, and the first end of the third fastening buckle 234 is embedded in the corresponding arc-shaped connecting groove 235 and hinged through a rotating shaft.

[0164] In this embodiment, the buckle body 21, the second fastening buckle 233, and the third fastening buckle 234 are processed from TC4 (titanium 4) material. It has been verified that TC4 material can be used as an implant material, meeting medical conditions such as biocompatibility. After testing, it has no interference or weakening effect on the signals of the intervention navigation system and will not cause adverse effects. At the same time, TC4 material can withstand various conventional sterilization forms in hospitals and departments, such as ultraviolet rays, high temperature and high pressure, low temperature plasma, etc., without causing adverse changes.

[0165] In another implementation manner of the fastening structure 23, as Figure 22 and Figure 23 shown, the buckle body 21 is integrally in a cylindrical thin-wall structure. The fastening structure 23 includes a plurality of first notches 238 provided circumferentially at the second end of the buckle body 21. The second end of the buckle body 21 is divided into a plurality of first fastening pieces 239 distributed at intervals through the plurality of first notches 238;

[0166] The fastening structure 23 further includes a tightening member 240. The tightening member 240 is sleeved on the outer side of the second end of the buckle body 21 and is threadedly connected to each first fastening piece 239 to press and fit each first fastening piece 239 on the outer side of the acoustic window portion 105.

[0167] In this embodiment, the fastening structure 23 is intended to firmly connect the buckle body 21 to the acoustic window portion 105 in a threaded form. Specifically, in this embodiment, a plurality of first notches 238 are formed in the second end of the buckle body 21 and are circumferentially distributed. Through the first notches 238, the second end of the buckle body 21 is divided into a plurality of first fastening pieces 239 that are spaced apart. The inner side surface of the first fastening piece 239 can be attached to the outer surface of the acoustic window portion 105. When the second end of the buckle body 21 is sleeved on the acoustic window portion 105, the plurality of first fastening pieces 239 surround the outside of the acoustic window portion 105. To enable the first fastening piece 239 to be tightly pressed against the outside of the acoustic window portion 105, the fastening structure 23 in this embodiment further includes a tightening member 240. The tightening member 240 is arranged at the second end of the buckle body 21 and has an overall hollow cylindrical structure. It can be sleeved on the second end of the buckle body 21, that is, on the outside of the first fastening piece 239. The tightening member 240 is threadedly connected to the first fastening piece 239, thereby pressing the first fastening piece 239 tightly against the outside of the acoustic window portion 105 to achieve the clamping of the buckle body 21 and the acoustic window portion 105.

[0168] In this embodiment, through the cooperation of the tightening member 240 and the plurality of first fastening pieces 239 that are circumferentially distributed, a certain clamping force can be applied to the periphery of the acoustic window portion 105, so that the buckle body 21 can be stably connected to the acoustic window portion 105. When disassembling, only need to rotate the tightening member 240 in the reverse direction so that the first fastening piece 239 can be separated from the acoustic window portion 105, and then the buckle body 21 can be removed axially.

[0169] To enable the tightening member 240 to better press the first fastening piece 239 against the surface of the acoustic window portion 105 by using thread rotation, as Figure 22 shown, in this embodiment, the outer side of the first fastening piece 239 has an external thread 2393 and a smooth first connection surface 2392, and the external thread 2393 and the first connection surface 2392 are distributed along the front-rear direction of the first fastening piece 239;

[0170] The inner side of the tightening member 240 is provided with an internal thread 2401 and a first pressing surface 2402, and the internal thread 2401 and the first pressing surface 2402 are distributed along the front-rear direction of the tightening member 240;

[0171] The internal thread 2401 is threadedly connected to the external thread 2393. The first pressing surface 2402 is a reduced-diameter structure facing the rear end. When the tightening member 240 and the first fastening piece 239 are threadedly connected, the first pressing surface 2402 can squeeze the first connection surface 2392 to press the first fastening piece 239 tightly against the outside of the acoustic window portion 105.

[0172] Specifically, it should be noted that the inner diameter of the front end of the tightening member 240 is larger than the diameter of the external thread 2393 on the first fastening piece 239, so that the front end of the tightening member 240 can be axially sleeved on the first fastening piece 239 and pass through a part of the external thread 2393. The rear end of the tightening member 240 is a first pressing surface 2402 with a reduced diameter structure. The diameter of the outermost end of the first pressing surface 2402 is less than or equal to the outer diameter of the first fastening piece 239 after being pressed against the sound window portion 105, and at the same time is larger than the outer diameter of the sound window portion 105.

[0173] During assembly, the second end of the buckle body 21 and the tightening member 240 are sleeved on the sound window portion 105 together, and then the tightening member 240 is rotated forward, so that the first pressing surface 2402 at the rear end moves forward. During the movement, the inner diameter of the part in contact with the first fastening piece 239 gradually decreases and presses the first fastening piece 239 inward, so that after moving to the set position, the first fastening piece 239 can be pressed to closely fit on the surface of the sound window portion 105, thereby fixing the buckle body 21 to the sound window portion 105. During disassembly, the tightening member 240 is rotated in the reverse direction, and the first fastening piece 239 can be separated from the sound window portion 105 under the action of its own elastic force.

[0174] To prevent the tightening member 240 from moving beyond the limit and causing the excessive pressure exerted by the first fastening piece 239 on the sound window portion 105, in this embodiment, a first limiting boss is provided on the first fastening piece 239. The first limiting boss is located at the front end of the external thread 2393. The inner diameter of the part of the tightening member 240 at the front end of the internal thread 2401 is larger than the outer diameter of the external thread 2393 and smaller than the outer diameter of the first limiting boss, and the travel of the tightening member 240 is limited by the first limiting boss.

[0175] Specifically, when the tightening member 240 rotates and moves until its end abuts against the first limiting boss, the tightening member 240 cannot move further. At this time, the pressure exerted by the first pressing surface 2402 on the first fastening piece 239 is limited, thus avoiding excessive pressure.

[0176] To facilitate the rotation of the tightening member 240, in this embodiment, a knurled groove is provided on the outer side of the tightening member 240.

[0177] In a setting mode of the first notch 238, the first notch 238 is set to four and evenly distributed along the circumferential direction. Of course, according to requirements, the first notch 238 can also be set to three or five or other numbers.

[0178] Since the pressure exerted by the first fastening piece 239 on the sound window portion 105 requires a certain amount of inward deformation of the first fastening piece 239 to achieve, therefore, to facilitate the corresponding deformation of the first fastening piece 239, such as Figure 22As shown, the first fastening piece 239 in this embodiment includes a first piece 2391 and a second piece 2394 which are distributed front and back. The inner surfaces of the first piece 2391 and the second piece 2394 are located on the same circumferential surface, so that it can better fit on the surface of the acoustic window portion 105. The thickness of the first piece 2391 is less than the thickness of the second piece 2394, so that the second piece 2394 can better generate deformation by using the first piece 2391, and the thicker second piece 2394 can also ensure the connection strength with the acoustic window portion 105. Therefore, the external thread 2393 and the first connection surface 2392 are both located on the second piece 2394.

[0179] In one implementation, the thickness of the second piece 2394 is greater than 0.6 mm.

[0180] In another implementation of the fastening structure 23, as Figure 24 shown, the fastening structure 23 includes a plurality of second notches 241 formed circumferentially at the second end of the buckle body 21. The second end of the buckle body 21 is divided into a plurality of second fastening pieces 242 distributed at intervals through the plurality of second notches 241. A first clamping portion 2421 is provided on the outer side of the second fastening piece 242;

[0181] The fastening structure 23 further includes a clamping member 243. The clamping member 243 can be sleeved on the second end of the buckle body 21 and located outside the second fastening piece 242. A second clamping portion 2431 is provided on the inner side of the clamping member 243. The first clamping portion 2421 and the second clamping portion 2431 are clamped and matched to press the second fastening piece 242 against the outer side of the acoustic window portion 105.

[0182] In this embodiment, the fastening structure 23 is intended to firmly connect the buckle body 21 to the acoustic window portion 105 in the form of axial clamping. Specifically, in this embodiment, a plurality of second notches 241 distributed circumferentially are formed at the second end of the buckle body 21. Through the second notches 241, the second end of the buckle body 21 is divided into a plurality of second fastening pieces 242 distributed at intervals. The inner side surface of the second fastening piece 242 can be attached to the outer surface of the acoustic window portion 105. When the second end of the buckle body 21 is sleeved on the acoustic window portion 105, a plurality of second fastening pieces 242 surround the outside of the acoustic window portion 105. To enable the second fastening piece 242 to be tightly pressed and attached to the outside of the acoustic window portion 105, the fastening structure 23 in this embodiment further includes a clamping member 243. The clamping member 243 is arranged at the second end of the buckle body 21 and has an overall hollow cylindrical structure. It can be sleeved on the second end of the buckle body 21, that is, on the outside of the second fastening piece 242. During assembly, the clamping member 243 is axially sleeved on the second fastening piece 242. After the second clamping portion 2431 in the clamping member 243 and the first clamping portion 2421 on the second fastening piece 242 are clamped and matched, the clamping member 243 is used to press the second fastening piece 242 inward so that it is tightly pressed and attached to the surface of the acoustic window portion 105, realizing the clamping of the buckle body 21 and the acoustic window portion 105.

[0183] In this embodiment, through the cooperation of the clamping member 243 and a plurality of second fastening pieces 242 distributed circumferentially, a certain clamping force can be applied to the periphery of the acoustic window portion 105, so that the buckle body 21 can be stably connected to the acoustic window portion 105. During disassembly, only the clamping member 243 needs to be pulled out in the reverse direction, so that the second fastening piece 242 can be separated from the acoustic window portion 105, and then the buckle body 21 can be axially removed.

[0184] To enable the clamping member 243 to better press the second fastening piece 242, a second connection surface 2420 is further provided on the outer side of the second fastening piece 242 in this embodiment. The first clamping portion 2421 and the second connection surface 2420 are distributed in the front-rear direction;

[0185] A second pressing surface 2432 is provided on the inner side of the clamping member 243. The second clamping portion 2431 and the second pressing surface 2432 are distributed in the front-rear direction;

[0186] The second pressing surface 2432 is a reduced-diameter structure facing the rear end. When the clamping member 243 is clamped and matched with the second fastening piece 242, the second pressing surface 2432 can squeeze the second connection surface 2420 to make the second fastening piece 242 tightly pressed and attached to the outside of the acoustic window portion 105.

[0187] Specifically, it should be noted that the inner diameter of the front end of the clamping member 243 is larger than the diameter of the first clamping portion 2421 on the second fastening piece 242, so that the front end of the clamping member 243 can be axially sleeved on the second fastening piece 242 and pass through a part of the first clamping portion 2421. The rear end of the clamping member 243 is the second pressing surface 2432 with a reduced diameter structure. The outer diameter of the outermost end of the second pressing surface 2432 is less than or equal to the outer diameter of the second fastening piece 242 after being pressed against the sound window portion 105, and at the same time is larger than the outer diameter of the sound window portion 105. During assembly, the second end of the buckle body 21 and the clamping member 243 are sleeved on the sound window portion 105 together, and then the clamping member 243 is pushed forward. The diameter of the part of the second pressing surface 2432 at the rear end that contacts the second fastening piece 242 gradually decreases during the movement and presses the second fastening piece 242 inward, so that after moving to the set position, the second fastening piece 242 can be pressed to closely fit on the surface of the sound window portion 105, thereby fixing the buckle body 21 to the sound window portion 105. During disassembly, the clamping member 243 is pulled out in the reverse direction, and the second fastening piece 242 can be separated from the sound window portion 105 under the action of its own elastic force.

[0188] To prevent the over-travel movement of the clamping member 243, which may cause excessive pressure exerted by the second fastening piece 242 on the sound window portion 105, in this embodiment, a second limiting boss is provided on the second fastening piece 242. The second limiting boss is located at the front end of the first clamping portion 2421. The inner diameter of the part of the clamping member 243 at the front end of the second clamping portion 2431 is larger than the outer diameter of the first clamping portion 2421 and smaller than the outer diameter of the second limiting boss, and the travel of the clamping member 243 is limited by the second limiting boss.

[0189] Specifically, when the clamping member 243 axially moves until its end abuts against the second limiting boss, the clamping member 243 cannot move further. At this time, the pressure exerted by the second pressing surface 2432 on the second fastening piece 242 is limited, thus avoiding excessive pressure.

[0190] Furthermore, the first clamping portion 2421 is a fastening card slot formed on the second fastening piece 242, and the second clamping portion 2431 is a fastening protrusion formed inside the clamping member 243, and the fastening protrusion and the fastening card slot are in clamping fit.

[0191] Of course, it can be understood that the first clamping portion 2421 can also be a fastening protrusion formed on the second fastening piece 242, and the second clamping portion 2431 can also be a fastening card slot formed inside the clamping member 243.

[0192] Since the fastening slot needs to be opposite to the fastening protrusion to complete the clamping connection, and the clamping member 243 and the buckle body 21 are essentially two independent components, in order to facilitate the docking of the clamping member 243 at any circumferential position, in this embodiment, the fastening slot is set as an arc-shaped through slot structure, and the fastening protrusion is set as a rib that can be clamped and matched with the through slot structure.

[0193] To improve the connection firmness and further facilitate the connection, in this embodiment, multiple fastening slots are provided on the second fastening piece 242 and are distributed axially, and at the same axial position, each second fastening piece 242 has the same fastening slot.

[0194] In one implementation, the second notch 241 is provided with four and is evenly distributed circumferentially.

[0195] Since the pressure exerted by the first fastening piece 239 on the sound window portion 105 needs to be achieved by a certain amount of inward deformation of the first fastening piece 239, in order to facilitate the corresponding deformation of the first fastening piece 239, the second fastening piece 242 in this embodiment includes a third body 2422 and a fourth body 2423 distributed front and back. The inner surfaces of the third body 2422 and the fourth body 2423 are located on the same circumferential surface, so that it can better fit on the surface of the sound window portion 105. The thickness of the third body 2422 is less than the thickness of the fourth body 2423, so that the fourth body 2423 can better generate deformation by using the third body 2422, and the thicker fourth body 2423 can also ensure the connection strength with the sound window portion 105. Therefore, the first clamping portion 2421 and the second connection surface 2420 are both located on the fourth body 2423.

[0196] In one implementation, the thickness of the fourth body 2423 is greater than 0.6 mm.

[0197] According to another aspect of the present invention, there is provided an intraoperative ultrasound probe assembly, including: an intraoperative ultrasound probe 1, an electromagnetic navigation sensor kit 3, and the above-mentioned buckle assembly 21. The electromagnetic navigation sensor kit 3 is mounted to the front end of the intraoperative ultrasound probe 1 through the buckle assembly 21.

[0198] According to another aspect of the present invention, there is provided a puncture system, including the above-mentioned intraoperative ultrasound probe assembly, a puncture kit, and a navigation device. Another electromagnetic navigation sensor kit is provided on the puncture kit;

[0199] The navigation device is configured to be able to extract the electromagnetic signals received by the two electromagnetic navigation sensor kits and determine the positional relationship between the puncture kit and the intraoperative ultrasound probe based on the extracted electromagnetic signals.

[0200] The navigation device is also used to display the position relationship. When the extension line of the puncture kit in the puncture direction intersects with the ultrasonic plane of the ultrasonic probe assembly, at least the intersection point is displayed in the ultrasonic image, and / or when the body of the puncture kit or its extension line is coplanar with the ultrasonic plane, the extension line is displayed in the ultrasonic image.

[0201] According to the above display method, after the ultrasonic probe assembly enters the patient's body and is placed on the surface of the organ, the doctor can combine the ultrasonic image to scan the target (the target can be the target portal vein or the target mass). Then, adjust the position and orientation of the puncture kit outside the patient's body, and aim at the target through the displayed intersection point and / or extension line. This aiming process can simultaneously determine three positioning points: the skin entry point, the liver surface entry point, and the target point. Finally, perform the puncture action. During the puncture process, keep the intersection point in the ultrasonic image always on the target, or the extension line passes through the target, which can ensure that the puncture needle can reach the target, thereby improving the puncture efficiency.

[0202] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic navigation sensor kit, characterized in that: include: Mounting parts, electromagnetic navigation sensors and protective tubes; among which, The mounting member is provided with a mounting portion, the electromagnetic navigation sensor is sleeved and mounted in the protection tube, and the protection tube is mounted in the mounting portion; The mounting piece is used to attach to the front end of an intraoperative ultrasound probe.

2. The electromagnetic navigation sensor kit according to claim 1, characterized in that: The mounting portion is a mounting groove provided on the mounting member, the outer side of the protection tube is fitted in the mounting groove, and the depth of the mounting groove is greater than or equal to the outer diameter of the protection tube.

3. The electromagnetic navigation sensor kit according to claim 2, characterized in that: The front end of the mounting groove is a closed structure, and the rear end of the mounting groove is an open structure. The front end of the electromagnetic navigation sensor extends out of the protection tube and abuts against the inner front side of the closed structure of the mounting groove.

4. The electromagnetic navigation sensor kit according to claim 3, characterized in that: The mounting member is provided with a second limiting structure, and the second limiting structure is used to limit the axial movement of the mounting member after being attached to the intraoperative ultrasound probe.

5. The electromagnetic navigation sensor kit according to claim 4, characterized in that: The second limiting structure is a limiting protrusion provided on both sides of the mounting member; and / or, The second limiting structure is a protrusion arranged on the lower surface of the mounting member.

6. The electromagnetic navigation sensor kit according to claim 2, characterized in that: The protection tube comprises a first tube body and a second tube body, the first tube body is movably sleeved in the second tube body, and the electromagnetic navigation sensor is installed in the first tube body; The front end of the second tube body is located behind the mounting member, and the front end of the first tube body extends to the second tube body and is mounted in the mounting groove.

7. The electromagnetic navigation sensor kit according to claim 6, characterized in that: The length of the first tube body extending out of the second tube body is greater than the length of the curved portion of the intraoperative ultrasound probe.

8. The electromagnetic navigation sensor kit according to claim 1, characterized in that: It also includes a fixing buckle, which is arranged in plurality and is used to attach the electromagnetic navigation sensor and the portion of the protection tube extending out of the rear end of the mounting member to the intraoperative ultrasound probe.

9. An ultrasonic probe assembly, characterized in that: Comprising the electromagnetic navigation sensor kit according to any one of claims 1 to 8.

10. A puncture system, characterized in that: It comprises the ultrasound probe assembly, the puncture kit and the navigation device as claimed in claim 9, wherein the puncture kit is provided with another electromagnetic navigation sensor kit; The navigation device is configured to extract electromagnetic signals received by two electromagnetic navigation sensor kits, and determine the positional relationship between the puncture kit and the intraoperative ultrasound probe based on the extracted electromagnetic signals.

11. The puncture system according to claim 10, characterized in that: The navigation device is also used to display the positional relationship. When an extension line of the puncture kit in the puncture direction intersects with the ultrasonic plane of the ultrasonic probe assembly, at least the intersection is displayed in the ultrasonic image, and / or when the body of the puncture kit or its extension line is coplanar with the ultrasonic plane, the extension line is displayed in the ultrasonic image.

Images