CN115006724A - Sealing Devices and Implantable Medical Systems - Google Patents

Abstract

The invention provides a sealing device and an implantable medical system, wherein the sealing device is used for an operation tool to pass through to operate a fastener, and comprises: the sealing main body comprises at least two elastic structures and a cavity structure located between two adjacent elastic structures, all the elastic structures are arranged in sequence along the inserting direction of the operating tool, and the elastic structures are used for sealing the operating tool through elastic deformation when the operating tool passes through. By utilizing the sealing device provided by the invention, when an operation tool is just inserted, even if the waterproof sealing function of the elastic structure at the uppermost layer fails, the elastic structure at the lower layer still can play a role in waterproof sealing; along with the insertion of the operation tool, even if the waterproof sealing function of the elastic structure at the lower layer fails, the elastic structure at the upper layer is tightly and uniformly attached to the operation tool through elastic deformation to recover the waterproof sealing function, so that the water leakage risk in the operation process can be reduced.

Description

Sealing Devices and Implantable Medical Systems

technical field

The invention relates to the technical field of medical devices, in particular to a sealing device and an implantable medical system.

Background technique

With the development of interventional medical surgery and neuroelectronic science and technology, implantable neurostimulation systems are widely used in clinical practice. According to the site where the neurostimulation system is implanted and the diseases to be treated, it is divided into: deep brain stimulation (DBS), cerebral cortex stimulation (CNS), spinal cord stimulation (SCS), sacral nerve stimulation (SNS), vagus nerve stimulation Electrical stimulation (VNS), etc.

Among them, deep brain stimulation (DBS) has become the preferred treatment for advanced Parkinson's disease worldwide due to its clinical effect superior to destructive surgery, neuro-interventional surgery that does not destroy brain tissue, and reversibility of treatment options. The existing deep brain stimulation system mainly consists of implanted pulse generator (IPG), stimulating electrode (Lead), in vivo extension lead (Extension), external program control equipment (Programer&Remoter) and related surgical tools (Surgical tool) and other parts. composition.

In the DBS system, the connector of the in-vivo electrode extension wire and the pulse generator IPG is fixed by fasteners. During surgery, the doctor uses an operating tool (such as a torque wrench) to penetrate the waterproof seal and then insert it into the fastener for locking or loosening operations. cracking, thereby increasing the risk of leaking water from the waterproof seal.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sealing device and an implantable medical system to solve the problem that the existing waterproof seal is easy to fall off and tear, thereby increasing the risk of water leakage.

In order to solve the above-mentioned technical problem, the present invention provides a sealing device for an operating tool to pass through to operate a fastener, comprising: a sealing main body, the sealing main body includes at least two elastic structures and two elastic structures located adjacent to each other. In the cavity structure between the structures, all the elastic structures are arranged in sequence along the insertion direction of the operating tool, and the elastic structures are used to seal the operating tool through elastic deformation when the operating tool passes through.

Optionally, in the sealing device, the elastic structure is an elastic body, and the elastic body has a passageway provided along the insertion direction of the operating tool for the operating tool to pass through, and the passing through The channel is closed before the insertion of the operation tool, and the minimum width is adapted to the width of the insertion portion of the operation tool after the insertion of the operation tool.

Optionally, in the sealing device, the passing channel is a straight channel, and after the operating tool is inserted into the passing channel, the insertion part is in a surface fit with the elastic body along its own circumferential direction; Alternatively, the passageway is an hourglass-shaped passageway, and after the operating tool is inserted into the passageway, the insertion portion is in line fit with the elastic body along its own circumferential direction.

Optionally, in the sealing device, the sealing device further comprises: a tear-proof ring, the tear-proof ring is provided at the end of the sealing body close to the insertion of the operating tool, and surrounds the Walkthrough settings.

Optionally, in the sealing device, the longitudinal section of the tear-proof ring is semicircular.

Optionally, in the sealing device, the elastic structure includes an elastic tube and an elastic ring, the elastic tube is arranged along the insertion direction of the operating tool, and is used for the operating tool to pass through, and the elastic ring The elastic tube is sleeved on the elastic tube, so that the elastic tube is in a closed state before the operation tool is inserted, and after the operation tool is inserted, the minimum inner diameter of the elastic tube is the same as the operation tool. Fits the width of the insert.

Optionally, in the sealing device, the sealing body further has a hole structure along the axial direction, and the hole structure is provided at an end of the sealing body away from the insertion of the operating tool, for the operating tool to pass through, The inner diameter of the hole structure is not smaller than the outer diameter of the operating tool.

Optionally, in the sealing device, the hole structure is a counterbore, the counterbore includes a first part and a second part arranged in sequence along the insertion direction of the operating tool, and the inner diameter of the first part is configured To be smaller than the outer diameter of the fastener, the inner diameter of the second portion is configured to be not smaller than the outer diameter of the fastener.

Optionally, in the sealing device, the inner diameter of the first portion is configured to be larger than the outer diameter of the operating tool.

Optionally, in the sealing device, the sealing device further comprises: an undercut structure, and the undercut structure protrudes from the outer side wall of the sealing body.

The present invention also provides an implantable medical system comprising the sealing device as described above.

Optionally, the implantable medical system further includes: a fastener, a positioning member, a connector and an electrode extension wire, and the fastener and the positioning member are used in cooperation to connect the The electrode extension wire is fixedly connected with the connecting head, and the sealing device is arranged in the connecting head, and is used for operating tools to pass through to operate the fastener.

Optionally, in the implantable medical system, the implantable medical system further comprises: a sealing filler, the sealing filler is filled between the outer side wall of the sealing device and the connecting head .

In summary, the present invention provides a sealing device for an operating tool to pass through to operate a fastener, and an implantable medical system including the sealing device, including: a sealing body, the sealing body including at least Two elastic structures and a cavity structure located between two adjacent elastic structures, all the elastic structures are arranged in sequence along the insertion direction of the operating tool, and the elastic structures are used to pass the elasticity when the operating tool passes through The deformation creates a seal on the working tool. That is, in the sealing device provided by the present invention, at least two elastic structures are arranged in sequence, so that the sealing device has a multi-layer waterproof function. When the operating tool is just inserted, even if the uppermost elastic structure is If the waterproof sealing function fails, the elastic structure of the lower layer can still play the role of waterproof sealing; with the insertion of the operating tool, even if the waterproof sealing function of the elastic structure of the lower layer fails, the elastic structure of the uppermost layer has passed the elastic The deformation is closely and evenly fitted with the operating tool, and the waterproof sealing function is restored, therefore, the risk of water leakage during the operation can be reduced.

Further, the hole structure provided on the sealing body makes the end of the operating tool not subjected to the pressing force of the sealing body at the end of the stroke of inserting the sealing body, so that the operating tool can be reduced in size Insertion force required when inserting the sealing body.

Further, the hole structure is a counterbore, the counterbore includes a first part and a second part, the first part is connected with the second slit, and the inner diameter of the first part is configured to be smaller than the fastener The outer diameter of the second part is configured to be not less than the outer diameter of the fastener, so designed, on the one hand, the second part can provide travel for the fastener to loosen, and on the other hand The travel of the fastener can be limited by the first portion to prevent the fastener from disengaging from the positioning member.

Further, the inversion of the outer side wall of the sealing device and the sealing filler between it and the connection head of the pulse generator make it difficult for the sealing device to fall off.

Further, the tear-proof ring on the sealing device protects the sealing device from being torn to a great extent.

Description of drawings

1 is a cross-sectional view of a sealing device provided in Embodiment 1 of the present invention;

2a and 2b are schematic diagrams of a straight-through passage in the implementation of the present invention;

Figures 3a and 3b are schematic views of an hourglass-shaped passageway in a first embodiment of the present invention;

4 is a cross-sectional view of the sealing device provided in Embodiment 1 of the present invention;

5 is a perspective view of the implantable medical system provided in Embodiment 1 of the present invention;

6 is a top view of the implantable medical system provided in Embodiment 1 of the present invention;

7 is a cross-sectional view of an implantable medical system provided in Embodiment 1 of the present invention;

8 is a schematic structural diagram of an elastic structure in Embodiment 2 of the present invention;

Wherein, each reference sign is described as follows:

1- Operating tools;

2-sealing device; 21-tear-proof ring; 22-sealing body; 23-inverted structure; 24-cavity structure;

22a, 22b - elastic structure;

25a, 25b - walk through channel;

26-hole structure; 26a-first part; 26b26b-second part;

3-connector; 4-electrode extension wire; 31-fastener; 32-positioning piece; 33-sealing filler;

201 - elastic tube; 202 - elastic ring.

Detailed ways

The sealing device and the implantable medical system proposed by the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, each drawing needs to show different emphases, and sometimes different scales are used. It should also be understood that unless otherwise specified or indicated, the terms "first", "second", "third" and other descriptions in the specification are only used to distinguish various components, elements, steps, etc. in the specification, rather than It is used to represent the logical relationship or sequence relationship among various components, elements, steps, etc. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated body; it may be directly connected or indirectly connected through an intermediate medium, It can be a communication within the two elements or an interaction relationship between the two elements.

[Example 1]

This embodiment provides a sealing device 2 for an operating tool to pass through to operate the fastener.

The operating tool involved in this embodiment is a tool that can pass through the sealing device 2 to screw the fastener, including a torque wrench, a screwdriver, and the like.

The fastener involved in this embodiment is a component that can be used in conjunction with a positioning member disposed on the connecting head to fix the electrode extension wire and the connecting head. For example, when the positioning member is a positioning nut When the fastener is a fastening screw, the operating tool is used to perform the locking or loosening operation of the fastening screw on the positioning nut. For another example, the positioning member has a limit groove, so The fastener has limit teeth that engage with the limit groove, and the operating tool is used to rotate the fastener to realize the engagement of the limit teeth in the limit groove or release the The engagement of the limiting teeth in the limiting grooves does not limit the specific implementation of the fastener in this embodiment.

Based on the above description, it can be seen that the specific operating tools and the specific fasteners involved in this embodiment do not constitute limitations on the sealing device 2 of the present application.

Referring to FIG. 1, the sealing device 2 includes: a sealing body 22, the sealing body 22 includes at least two elastic structures and a cavity structure 24 located between two adjacent elastic structures, all the elastic structures are along the The insertion directions of the operating tool 1 are set in sequence, and the elastic structure is used to seal the operating tool 1 through elastic deformation when the operating tool 1 travels.

As shown in FIG. 1, the sealing body 22 includes two elastic structures 22a and 22b. In other embodiments, the number of the elastic structures may also be 3, 4, etc. In practical application, considering that the size of the sealing device 2 needs to be reduced as much as possible, two elastic structures can be preferably used, which can not only meet the waterproof function, but also avoid the inconvenience of installation due to excessive size, or As a result, the overall size of the DBS system is too large, causing discomfort to the implanted person after implantation.

As mentioned above, in the deep brain stimulation (DBS) system, the connector between the in-vivo electrode extension cable and the pulse generator IPG is fixed by fasteners. Usually, a waterproof seal is used, by inserting the operating tool 1 (such as a torque wrench) into the waterproof seal and then inserting it into the fastener to perform locking or loosening operations. When the operating tool 1 penetrates the waterproof seal, the Its sealing function is prone to failure, thereby increasing the risk of water leakage.

However, in the sealing device 2 provided in this embodiment, at least two elastic structures are arranged in sequence, so that the sealing device 2 has a multi-layer waterproof function. When the operating tool 1 is just inserted, even if the uppermost layer of the When the waterproof sealing function of the elastic structure 22a fails, the lower elastic structure 22b can still play a waterproof sealing function; with the insertion of the operating tool 1, even if the waterproof sealing function of the lower elastic structure 22b fails, the uppermost The elastic structure 22a has been tightly and evenly attached to the operating tool 1 through elastic deformation, so as to restore the waterproof sealing function, thus, the risk of water leakage during the operation can be reduced.

In this embodiment, the elastic structure is an elastic body, and the elastic body has a passageway provided along the insertion direction of the operation tool 1 for the operation tool 1 to pass through, and the passageway is used for the operation of the operation tool 1 . The tool 1 is closed before insertion, and the minimum width after the insertion of the operation tool 1 is adapted to the width of the inserted portion of the operation tool 1 . Specifically, as shown in FIG. 1 , the elastic structure 22a has a passage 25a, and the elastic structure 22b has a passage 25b. For the convenience of description, in the following description, the elastic structure 22a and the elastic structure 22b, which respectively have passages 25a and 25b, are used to exemplify the sealing body 22 in this embodiment, but it should be understood that this application does not This is limited.

Further, in this embodiment, the passing channels 25a and 25b may be straight channels, and after the operating tool 1 is inserted into the passing channels 25a and 25b, the insertion portion faces the elastic body along its circumferential direction. For example, the passages 25a and 25b can be formed by using slits running through the axial direction of the elastic body. Before the operating tool is inserted, the slits are in a closed state due to the action of stress. After the operating tool 1 is inserted, it undergoes elastic deformation to expand, and the number of the slits can be one or more. Referring to FIG. 2a, when the number of slits is one, it constitutes the passage of the operating tool 1 itself, and preferably, its width is greater than the width of the insertion portion of the operating tool 1, so that in all After the operating tool 1 is inserted, the elastic body can wrap the operating tool 1 along the circumferential direction of the operating tool 1, which has a better waterproof sealing effect; please refer to Figure 2b, when the number of slits is When there are more than one, a plurality of the slits may be arranged in sequence along the circumferential direction of the elastic body, and one end of the slits is connected on the axis of the elastic body, and the connecting places constitute the passing passages 25a and 25b.

Referring to FIG. 3a and FIG. 3b, in this embodiment, the elastic body may further have a curved surface protruding toward the axis, so that the passing channels 25a and 25b are hourglass-shaped channels, that is, the passing channel 25a The radial dimensions of the passages 25a and 25b gradually decrease first and then gradually increase. Before the operating tool 1 is inserted, the radial dimensions of the passages 25a and 25b are in a closed state. After the passages 25a, 25b, the insertion portion is in line with the corresponding elastic body in the circumferential direction of the passages 25a, 25b where the radial dimension of the passages 25a, 25b is the smallest. When the passageway is an hourglass-shaped channel, since the insertion part of the operating tool 1 is in a linear fit with the elastic body, compared with the surface fit, the waterproof sealing effect will be reduced, but as shown in the figure As shown in 3b, since the two elastic bodies can be adjacent to each other, the space between the two can constitute the cavity structure, which can meet the design requirement of the smaller axial dimension of the sealing device 2 .

In other embodiments, the passing channels 25a and 25b may also adopt other designs. For example, the passing channels 25a and 25b may adopt an infinitely reduced hole design, or adopt an alternate arrangement of slits and small holes. The application does not limit this, as long as the operating tool 1 can be in a closed state before the operating tool 1 is inserted, and after the operating tool 1 is inserted, the operating tool 1 can be at least partially circumferentially connected to the elastic body Just fit tightly.

It should be noted that this embodiment does not limit the parts of the sealing body 22 other than the elastic structure. In this embodiment, as shown in FIG. 1 , the sealing body 22 is all designed as an elastic body. In other embodiments, the parts of the sealing body 22 other than the elastic structure can also be rigidly designed.

Preferably, please refer to FIG. 4 , the sealing device 2 provided in this embodiment further includes: a tear-proof ring 21 , and the tear-proof ring 21 is arranged on the sealing body 22 near the operating tool 1 to be inserted into the sealing device 2 . one end (hereinafter referred to as the insertion end), and is arranged around the passageway.

For the sealing body 22, the insertion end is more prone to tearing, so when the tear-proof ring 21 is arranged around the passageway 25a of the insertion end, a better tear-proof effect can be achieved, so that the Reduce the risk of water leakage. Wherein, in this embodiment, the longitudinal section of the tear-proof ring 21 can be semi-circular. When the longitudinal section of the tear-proof ring 21 is semi-circular, under the influence of tension, its anti-tear effect will be reduced. Preferably, in other embodiments, the longitudinal section of the tear-proof ring 21 may also be square, triangular, or the like.

In addition, preferably, please continue to refer to FIG. 4 in conjunction with FIG. 1 , the sealing device 2 further includes: an undercut structure 23 , and the undercut structure 23 protrudes from the outer side wall of the sealing body 22 . The inverted structure 23 can prevent the sealing body 22 from being disengaged from the connecting head after being disposed in the connecting head of the pulse generator. As shown in FIG. 4 , the undercut structure 23 may be a protruding ring arranged along the circumferential direction of the sealing body 22 , but the present application is not limited to this, and the undercut structure 23 may also be along the A plurality of protruding blocks are distributed sequentially in the circumferential direction of the sealing body 22 . In this embodiment, the undercut structure 23 may be integrally formed with the sealing body 22 , and in other embodiments, the undercut structure 23 may also be fixed on the sealing body 22 .

It should be noted that, as shown in FIG. 4 , the sealing device 2 includes two parallel sealing bodies 22 as an example, so as to seal the pulse generator whose connecting head has two connecting grooves. In practical application, the sealing device 2 may also include only one sealing body 22 , or a plurality of the sealing bodies 22 in parallel, which is not limited in this application. In addition, since the sealing device 2 provided in the embodiment of the present invention is an implantable sealing device 2, preferably, the sealing body 22 is made of a silicone material, but of course other elastic biocompatible materials can also be used.

Preferably, please refer to FIG. 1 , the sealing body 22 is further provided with a hole structure 26 along the axial direction, and the hole structure 26 is provided at the end of the sealing body 22 away from the insertion of the operator (hereinafter referred to as the penetrating end), For the operating tool 1 to pass through, the inner diameter of the hole structure 26 is not less than the outer diameter of the operating tool 1 . The hole structure 26 is provided at the penetrating end of the sealing body 22 , so that the end of the operating tool 1 is no longer subjected to the pressing force of the sealing body 22 at the end of the stroke of inserting the sealing body 22 , Therefore, the insertion force required for the operation tool 1 to be inserted into the sealing body 22 can be reduced.

Further preferably, the hole structure 26 is a counterbore, and the counterbore includes a first part 26a and a second part 26b arranged in sequence along the insertion direction of the operating tool 1, and the inner diameter of the first part 26a is configured to be smaller than the The outer diameter of the fastener, the inner diameter of the second portion 26b is configured to be not smaller than the outer diameter of the fastener. In this way, on the one hand, the second part 26b provides a travel for the fastener to loosen, and on the other hand, the first part 26a limits the travel of the fastener to prevent the fastener from disengaging positioning piece.

As shown in FIGS. 5 to 7 , an embodiment of the present invention further provides an implantable medical system, and the implantable medical system includes: the sealing device 2 described in this embodiment.

In addition, the implantable medical system further includes: a fastener 31 , a positioning member 32 , a connecting head 3 (connecting head of the pulse generator) and an electrode extension wire 4 , the fastener 31 and the positioning member 32 Used in conjunction with the electrode extension wire 4 to be fixedly connected to the connector 3 , the sealing device 2 is provided in the connector 3 for the operating tool 1 to pass through the fastener 31 operate.

Preferably, the implantable medical system further comprises: a sealing filler 33 , the sealing filler 33 is filled between the outer side wall of the sealing device 2 and the connecting head 3 . And preferably, the sealing filler 33 is an implantable filler, such as epoxy resin filler, silicone filler, polyurethane filler and the like.

In this embodiment, the fastener 31 is a fastening screw, and the positioning member 32 is a positioning nut. Correspondingly, the operating tool 1 is a torque wrench. The tightening or loosening operation of the tightening screw on the positioning nut is performed by the torque wrench, thereby correspondingly realizing the connection and release of the electrode extension wire 4 and the connection head 3 of the pulse generator.

The top of the fastening screw is provided with an inner hexagonal hole, and the end of the torque wrench is inserted into the inner hexagonal hole to realize the locking or loosening operation of the fastening screw.

When the fastener 31 is a screw and the positioning member 32 is a positioning nut, the use process of the implantable medical system is as follows:

Use the positioning member 32 to realize the preliminary connection of the electrode extension line 4 and the connecting head 3 of the pulse generator;

Insert the torsion wrench into the sealing device 2. When the torsion wrench is inserted into the elastic structure 22a, the elastic structure 22b functions as a waterproof seal. When the torque wrench is inserted into the elastic structure 22b, the elastic structure 22a has recovered. sealing function;

When the torque wrench is inserted into the hexagonal hole on the top of the fastening screw, the fastening screw is locked in the positioning nut by rotating in the first direction, so as to realize the electrode extension line 4 and the pulse generation The fixed connection of the connector 3 of the device;

When the tightening screw needs to be loosened, the tightening screw is loosened by rotating the torque wrench in a second direction opposite to the first direction, due to the second portion 26b of the counterbore The inner diameter of the counterbore is not less than the outer diameter of the fastening screw, and the inner diameter of the first part 26a of the counterbore is smaller than the outer diameter of the fastening screw, so the second part 26b of the counterbore provides the fastening screw There is no travel space outside the positioning nut, and the first part 26a of the counterbore defines the travel end of the fastening screw to prevent the fastening screw from completely disengaging from the positioning nut.

In other embodiments, the positioning member 32 has a limit groove, and the fastener 31 has limit teeth engaged with the limit groove, when the limit teeth are engaged with the limit When the slot is placed, the fixed connection between the electrode extension line 4 and the connecting head 3 of the pulse generator is realized. The top of the fastener 31 can also be provided with an inner hexagonal hole. When a torque wrench is inserted into the inner hexagonal hole at the top of the fastening screw, the torque wrench rotates to drive the fastener 31 into the positioning member 32 Rotation of the limit groove to realize the engagement or release of the limit tooth with the limit slot.

When the positioning member 32 has a limit groove, and the fastener 31 has limit teeth engaged with the limit groove, the use process of the implantable medical system is as follows:

Use the positioning member 32 to realize the preliminary connection of the electrode extension line 4 and the connecting head 3 of the pulse generator;

Insert the torsion wrench into the sealing device 2, when the torsion wrench is inserted into the elastic structure 22a, the elastic structure 22b functions as a waterproof seal, and when the torsion wrench is inserted into the elastic structure 22b, the elastic structure 22a has recovered sealing function;

When the torque wrench is inserted into the hexagonal hole of the fastener 31, the limiting teeth of the fastener 31 are engaged in the limiting groove by rotating in the first direction, so as to realize the electrode extension line 4 and the fixed connection of the connector 3 of the pulse generator;

When the electrode extension wire 4 needs to be detached from the pulse generator, the fastener 31 is driven to rotate in the second direction by rotating the torque wrench in the second direction opposite to the first direction, so as to release the Engagement with the limiting teeth.

[Example 2]

Referring to FIG. 8 , the difference from the first embodiment is that in this embodiment, the elastic structure includes an elastic tube 201 and an elastic ring 202 , and the elastic tube 201 is arranged along the insertion direction of the operating tool 1 for supplying The operating tool 1 passes through, and the elastic ring 202 is sleeved on the elastic tube 201, so that the elastic tube 201 is in a sealed state before the operating tool 1 is inserted, and After the insertion, the minimum inner diameter of the elastic tube 201 is adapted to the width of the insertion portion of the operating tool 1, so that the operating tool 1 fits the inner wall of the elastic tube 201, and the operating tool 1 1 to seal.

In summary, the present invention provides a sealing device for an operating tool to pass through to operate a fastener, and an implantable medical system including the sealing device, including: a sealing body, the sealing body including at least Two elastic structures and a cavity structure located between two adjacent elastic structures, all the elastic structures are arranged in sequence along the insertion direction of the operating tool, and the elastic structures are used to pass the elasticity when the operating tool passes through The deformation creates a seal on the working tool. That is, in the sealing device provided by the present invention, at least two elastic structures are arranged in sequence, so that the sealing device has a multi-layer waterproof function. When the operating tool is just inserted, even if the uppermost elastic structure is If the waterproof sealing function fails, the elastic structure of the lower layer can still play the role of waterproof sealing; with the insertion of the operating tool, even if the waterproof sealing function of the elastic structure of the lower layer fails, the elastic structure of the uppermost layer has passed the elastic The deformation is closely and evenly fitted with the operating tool, and the waterproof sealing function is restored, therefore, the risk of water leakage during the operation can be reduced.

It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. , the different parts of each embodiment can also be used in combination with each other, which is not limited in the present invention.

In addition, it should be appreciated that although the present invention has been disclosed above in terms of preferred embodiments, the above-mentioned embodiments are not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, many possible changes and modifications can be made to the technical solution of the present invention by using the technical content disclosed above, or modified to equivalent changes, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the protection scope of the technical solutions of the present invention.

Claims (13)

What is claimed is: 1. A sealing device for an operating tool to pass through to operate a fastener, characterized by comprising: a sealing body, the sealing body comprising at least two elastic structures and located between two adjacent elastic structures All the elastic structures are arranged in sequence along the insertion direction of the operating tool, and the elastic structures are used to seal the operating tool through elastic deformation when the operating tool passes through. 2 . The sealing device according to claim 1 , wherein the elastic structure is an elastic body, and the elastic body has a passage channel provided along the insertion direction of the operating tool for the operating tool to pass through. 3 . , the passageway is closed before the insertion of the operation tool, and the minimum width after the insertion of the operation tool is adapted to the width of the insertion portion of the operation tool. 3 . The sealing device according to claim 2 , wherein the passageway is a straight type passageway, and after the operating tool is inserted into the passageway, the insertion portion faces the elastic body along its circumferential direction. 4 . or, the passageway is an hourglass type passageway, and after the operating tool is inserted into the passageway, the insertion portion is in line-like fit with the elastic body along its own circumferential direction. 4. The sealing device according to claim 2, characterized in that, the sealing device further comprises: a tear-proof ring, the tear-proof ring is provided on the end of the sealing body close to the insertion of the operating tool, and arranged around the passage. 5. The sealing device of claim 4, wherein the longitudinal section of the tear-proof ring is semicircular. 6. The sealing device according to claim 1, wherein the elastic structure comprises an elastic tube and an elastic ring, the elastic tube is arranged along the insertion direction of the operating tool, and is used for the operating tool to pass through, The elastic ring is sleeved on the elastic tube, so that the elastic tube is in a closed state before the operating tool is inserted, and after the operating tool is inserted, the minimum inner diameter of the elastic tube is the same as the minimum inner diameter of the elastic tube. The width of the insertion portion of the operating tool is adapted. 7 . The sealing device according to claim 1 , wherein the sealing body further has a hole structure along the axial direction, and the hole structure is provided at an end of the sealing body away from the insertion of the operating tool for the operation. 8 . The tool goes out, and the inner diameter of the hole structure is not less than the outer diameter of the operating tool. 8 . The sealing device according to claim 7 , wherein the hole structure is a counterbore, and the counterbore comprises a first part and a second part arranged in sequence along the insertion direction of the operating tool, the first part The inner diameter of a portion is configured to be smaller than the outer diameter of the fastener, and the inner diameter of the second portion is configured to be not smaller than the outer diameter of the fastener. 9. The sealing device of claim 8, wherein the inner diameter of the first portion is configured to be greater than the outer diameter of the working tool. 10 . The sealing device according to claim 1 , wherein the sealing device further comprises: an undercut structure, and the undercut structure protrudes from the outer side wall of the sealing body. 11 . 11. An implantable medical system, characterized by comprising the sealing device according to any one of claims 1-10. 12. The implantable medical system according to claim 11, further comprising: a fastener, a positioning member, a connecting head and an electrode extension wire, the fastener and the positioning member are used in cooperation with When the electrode extension wire is fixedly connected with the connecting head, the sealing device is arranged in the connecting head, and is used for operating tools to pass through to operate the fastener. 13. The implantable medical system according to claim 12, wherein the implantable medical system further comprises: a sealing filler, the sealing filler is filled between the outer sidewall of the sealing device and the between connectors.

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