Epidural interventional devices, adhesion lysis methods, and electrode transfer methods

Abstract

The embodiment of the present invention discloses an epidural interventional device, an adhesion release method and an electrode movement method. The interventional device includes a guidewire structure, a sleeve structure and an elastic structure. The guidewire structure includes a guidewire body and a first balloon, and the sleeve structure includes a sleeve body and a second balloon. The two ends of the elastic structure are respectively connected to the guidewire body and the sleeve body, and are used to push the interventional device to move in the adhesion area. The guidewire structure cooperates with the sleeve structure, and the elastic structure pushes the interventional device to enter a narrow space, and the first balloon and the second balloon can release the epidural adhesion area, expand the electrode puncture target position, and ensure the smooth completion of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an epidural intervention device, an adhesion lysis method and an electrode moving method. Background Art

[0002] Interventional surgery is a minimally invasive treatment method. Generally speaking, it is a surgical method that introduces a special catheter or guidewire into the human body under the guidance of imaging equipment to treat the lesion. For example, in spinal cord stimulation surgery, the spinal cord stimulation puncture electrode needs to be placed in the target position of the epidural space, and the electrode is connected to the external stimulator through a wire, so that the patient can carry it for a long time and achieve analgesia through intermittent electrical stimulation.

[0003] With the development of neuromodulation technology, the number of spinal cord stimulation surgeries is increasing. Among the surgical patients, most have undergone spinal surgery and are elderly patients. Therefore, during the operation, epidural adhesions of the spinal cord are often encountered. In the process of placing the spinal cord stimulation puncture electrode, it is difficult to place the electrode in the ideal epidural position due to the obstruction of the adhesion area, which affects the treatment effect. Most of the adhesion release products in the prior art only provide a thin guide wire to expand the epidural space. However, due to the thin diameter of the thin guide wire and its soft texture, the adhesion area cannot be effectively expanded. At the same time, although the electrode used for spinal cord stimulation puncture is also provided with a guide wire structure, the guide wire is also soft in texture. Direct placement of the electrode will cause it to encounter resistance in the adhesion area, bend and turn, and cannot be placed in the ideal target position, resulting in the operation cannot be completed smoothly, affecting the treatment effect. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an epidural interventional device, an adhesion release method and an electrode movement method, which can enter a narrow space, release the epidural adhesion area, expand the electrode puncture target position, and ensure the smooth completion of the operation.

[0005] In a first aspect, an embodiment of the present invention provides an epidural intervention device, comprising:

[0006] The guidewire structure comprises a guidewire body and a first balloon, wherein a first channel having an opening is provided inside the guidewire body, and the first balloon is wrapped around the outside of the guidewire body and close to the front end of the guidewire body;

[0007] The cannula structure comprises a cannula body and a second balloon, wherein the second balloon is wrapped on the outside of the cannula body and is located at the front end of the cannula body, a second through passage is opened inside the cannula body, the guide wire body is movably connected in the second passage, the first balloon is located on the outside of the cannula body, and the tail of the guide wire body extends out from the tail of the cannula body;

[0008] The elastic structure has two ends respectively connected to the guide wire body and the sleeve body.

[0009] Optionally, a curved portion is provided at the front end of the guidewire body, and the curved portion is provided on the outside of the first balloon.

[0010] Optionally, the guidewire structure further includes a first three-way structure, which is disposed at the tail of the guidewire body and is connected to the first channel through an opening of the first channel.

[0011] Optionally, the sleeve structure also includes a second three-way structure, which is arranged at the tail end of the sleeve body. A cavity is annularly arranged outside the second channel inside the sleeve body, and the cavity is not connected to the second channel. The cavity is provided with a connecting hole, and the second three-way structure is connected to the cavity through the connecting hole.

[0012] Optionally, at least one first injection hole is opened in the portion of the guidewire body wrapped by the first balloon, and the first channel of the guidewire body is connected to the first balloon through the first injection hole.

[0013] Optionally, at least one second injection hole is opened in the portion of the sleeve body wrapped by the second balloon, and the cavity of the sleeve body is connected to the second balloon through the second injection hole.

[0014] In a second aspect, an embodiment of the present invention provides a method for releasing adhesions, comprising:

[0015] Insert the puncture needle outside or near the adhesion area;

[0016] extracting air from the interventional device;

[0017] Moving the interventional device through the inner channel of the puncture needle and allowing the first balloon and the second balloon to pass through the puncture needle;

[0018] Moving the interventional device to the inside of the adhesion area, injecting liquid into the first balloon to gradually expand the first balloon, and loosening the adhesion area;

[0019] The liquid in the first balloon is extracted to shrink the first balloon, and the interventional device is taken out through the puncture needle.

[0020] Optionally, moving the interventional device to the inside of the adhesion area comprises:

[0021] rotating the interventional device so that the curved portion faces the adhesion area to be released;

[0022] injecting liquid into the first balloon to expand the first balloon;

[0023] Pushing the sleeve body to slide toward the first balloon to compress the elastic structure;

[0024] injecting liquid into the second balloon to expand the second balloon;

[0025] The liquid in the first balloon is extracted to shrink the first balloon, and the elastic structure pushes the guide wire body and the first balloon to move toward the bending portion;

[0026] extracting the liquid in the second balloon to shrink the second balloon;

[0027] The above steps are repeated until the interventional device is moved to the adhesion area to be released.

[0028] In a third aspect, an embodiment of the present invention provides an electrode moving method, comprising:

[0029] Insert the puncture needle near the electrode;

[0030] extracting air from the interventional device;

[0031] Moving the interventional device through the inner channel of the puncture needle and allowing the first balloon and the second balloon to pass through the puncture needle;

[0032] Moving the intervention device to a side of the electrode away from the target position, injecting liquid into the first balloon to gradually expand the first balloon, and pushing the electrode to move to the target position;

[0033] The liquid in the first balloon is extracted to shrink the first balloon, and the interventional device is taken out through the puncture needle.

[0034] Optionally, moving the interventional device to a side of the electrode away from the target location comprises:

[0035] Rotating the interventional device so that the curved portion faces a direction of the electrode away from the target area;

[0036] injecting liquid into the first balloon to expand the first balloon;

[0037] Pushing the sleeve body to slide toward the first balloon to compress the elastic structure;

[0038] injecting liquid into the second balloon to expand the second balloon;

[0039] The liquid in the first balloon is extracted to shrink the first balloon, and the elastic structure pushes the guide wire body and the first balloon to move toward the bending portion;

[0040] extracting the liquid in the second balloon to shrink the second balloon;

[0041] The above steps are repeated until the intervention device moves to a side of the electrode away from the target position.

[0042] The embodiments of the present invention provide an epidural interventional device, an adhesion release method, and an electrode movement method. The interventional device includes a guidewire structure, a sleeve structure, and an elastic structure. The guidewire structure includes a guidewire body and a first balloon, the sleeve structure includes a sleeve body and a second balloon, and the two ends of the elastic structure are respectively connected to the guidewire body and the sleeve body. The guidewire structure cooperates with the sleeve structure, and the elastic structure pushes the interventional device to enter a narrow space, and the first balloon and the second balloon can release the epidural adhesion area, expand the electrode puncture target position, and ensure the smooth completion of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0044] Figure 1 is a schematic structural diagram of an interventional device according to an embodiment of the present invention;

[0045] Figure 2 is a partially enlarged schematic diagram of an interventional device according to an embodiment of the present invention;

[0046] Figure 3 is another partially enlarged schematic diagram of an interventional device according to an embodiment of the present invention;

[0047] Figure 4 is another partially enlarged schematic diagram of an interventional device according to an embodiment of the present invention;

[0048] Figure 5 It is a top view of a cross-sectional view of a joint between a guidewire structure and a sleeve structure of an interventional device according to an embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of an interventional device placed inside a puncture needle according to an embodiment of the present invention;

[0050] Figure 7 is a partially enlarged schematic diagram of an interventional device according to an embodiment of the present invention being placed inside a puncture needle;

[0051] Figure 8 is a flow chart of a method for releasing adhesion according to an embodiment of the present invention;

[0052] Fig. 9 is a flow chart of a method for moving an interventional device into an adhesion area according to an embodiment of the present invention;

[0053] Fig.10 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0054] Fig.11 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0055] Fig.12 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0056] Fig.13 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0057] Fig.14 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0058] Fig.15 is a schematic diagram of the movement process of an interventional device according to an embodiment of the present invention;

[0059] Fig.16 is a flow chart of an electrode moving method according to an embodiment of the present invention;

[0060] Fig.17 is a flow chart of a method for moving an interventional device to a side of an electrode away from a target position according to an embodiment of the present invention;

[0061] Fig.18 It is a schematic diagram of the process of pushing the electrode to move by an interventional device according to an embodiment of the present invention.

[0062] Description of reference numerals:

[0063] 100-interventional device; 11-guidewire body; 12-first balloon; 13-bend; 14-first three-way structure; 15-first injection hole; 16-first channel; 21-cannula body; 22 second balloon; 23-second three-way structure; 24-second injection hole; 25-cavity; 26 connecting hole; 3-elastic structure; 200-puncture needle. DETAILED DESCRIPTION

[0064] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0065] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0066] Unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0068] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0069] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0070] During interventional surgery, the treatment device needs to be placed at the target position with the assistance of a development and positioning device. For example, during spinal cord stimulation surgery, X-ray development and positioning are required to assist in placing the electrode at the target position outside the dural cavity. During the placement process, the adhesion area will block the placement of the electrode, causing the electrode to shift position and affect the treatment effect. To achieve better treatment effects, the adhesion area needs to be loosened or the electrode needs to be pushed to the target position.

[0071] Reference Figure 1The epidural interventional device 100 of the embodiment of the present invention includes a guidewire structure, a sleeve structure and an elastic structure 3. Among them, the guidewire structure and the sleeve structure are connected by the elastic structure 3, and the elasticity of the elastic structure 3 is used to cooperate with the first balloon 12 and the second balloon 22 to achieve relative movement. By moving the sleeve structure and using the elastic force of the elastic structure 3 to push the guidewire structure forward, the first balloon 12 and the second balloon 22 can enter the adhesion area and expand, and finally achieve effective release of the adhesion area. At the same time, the guidewire structure can also guide the moving direction of the interventional device 100, so that the interventional device 100 can accurately reach the adhesion area for release, expand the target position of electrode puncture, and ensure the smooth completion of the operation.

[0072] Figure 2 is an enlarged schematic diagram of the interventional device structure A. Figure 1-Figure 2 The guidewire structure includes a guidewire body 11 and a first balloon 12. A first channel 16 with an opening is provided inside the guidewire body 11, and the opening is connected to the outside, so that gas and liquid from the outside can enter the guidewire body 11, and the first channel 16 is used to transmit gas and liquid. The first balloon 12 is wrapped on the outside of the guidewire body 11, so that when liquid is injected into the first balloon 12, the surface of the first balloon 12 can expand with the guidewire body 11 as the central axis, avoiding the deviation of the moving direction of the guidewire structure due to the balloon only expanding to one side, thereby affecting the guidance of the interventional device 100. The first balloon 12 is also close to the front end of the guidewire body 11, so that when the guidewire body 11 enters a narrow adhesion area, the first balloon 12 can expand quickly to loosen the adhesion area, and the guidewire body 11 can gradually move in the adhesion area.

[0073] In some embodiments, reference Figure 2 At least one first injection hole 15 is provided in the portion of the guidewire body 11 wrapped by the first balloon 12, and the first channel 16 of the guidewire body 11 is connected to the first balloon 12 through the first injection hole 15. According to actual conditions, multiple first injection holes 15 can be provided to speed up the speed of gas and liquid entering and exiting the first balloon 12, saving time during surgery.

[0074] In some embodiments, reference Figure 1 The front end of the guide wire body 11 is provided with a curved portion 13, and the curved portion 13 is arranged outside the first balloon 12. That is to say, when the guide wire structure moves, it is first guided by the curved portion 13 and enters the narrow part of the adhesion area. At the same time, since the curved portion 13 is arranged outside the first balloon 12, after the curved portion 13 enters the adhesion area, the first balloon 12 can be quickly expanded to loosen and expand the adhesion area, ensuring a smooth operation.

[0075] In some embodiments, reference Figure 1The guidewire structure also includes a first three-way structure 14, which is used to exchange gas and liquid with the outside world. The first three-way structure 14 is arranged at the tail of the guidewire body 11, and is connected to the first channel 16 through the opening of the first channel 16. At the same time, the first three-way structure 14 can be connected to a liquid pump and a gas pump outside to transport liquid or gas to the first channel 16 in the guidewire body 11. For example, syringes are connected to the two tails of the first three-way structure 14 respectively. When the first balloon 12 needs to maintain a contracted state before puncture, the air in the first balloon 12 is extracted through the first channel 16 by an air syringe to shrink the first balloon 12; when the first balloon 12 needs to be expanded and loosened, a liquid syringe is used to inject a developer into the first balloon 12 through the first channel 16 to expand the first balloon 12. The first three-way structure 14 can adjust the first balloon 12 according to different usage requirements to achieve the loosening of the adhesion area and ensure a smooth operation.

[0076] Figure 3 is an enlarged schematic diagram of the interventional device structure B. Figure 4 is an enlarged schematic diagram of the interventional device structure C. Figure 1 , Figure 3-Figure 4 The sleeve structure includes a sleeve body 21 and a second balloon 22. The second balloon 22 is wrapped around the outside of the sleeve body 21 and is located at the front end of the sleeve body 21, and is used to position the sleeve body 21 in the body and push the guide wire structure. The second balloon 22 is wrapped around the outside of the sleeve body 21, so that when liquid is injected into the second balloon 22, the surface of the second balloon 22 can expand with the sleeve body 21 as the central axis, avoiding the deviation of the moving direction of the interventional device 100 due to the balloon only expanding to one side. According to actual conditions, the second balloon 22 can also cooperate with the first balloon 12 to achieve a larger range of release, or be used to place the interventional device 100 on one side of the electrode and push the placed electrode laterally. A through second channel is opened inside the sleeve body 21, that is, the sleeve body 21 is an annular sleeve. A cavity 25 arranged annularly outside the second channel is also opened inside the sleeve body 21, that is, the sleeve body 21 has a double-layer tube wall, and a cavity 25 is arranged between the two layers of tube walls. The cavity 25 is not connected to the second channel, but is provided with a connection hole 26, and is connected to the outside through the connection hole 26, so that gas and liquid from the outside can enter the sleeve body 21. The cavity 25 is used for transmitting gas and liquid.

[0077] In some embodiments, reference Figure 4 At least one second injection hole 24 is provided in the part of the cannula body 21 wrapped by the second balloon 22, and the cavity 25 of the cannula body 21 is connected with the second balloon 22 through the second injection hole 24. According to actual conditions, multiple second injection holes 24 can be provided to speed up the speed of gas and liquid entering and exiting the second balloon 22, saving time during surgery.

[0078] Reference Figure 1 , Figure 5 The second channel enables the guidewire body 11 to be movably connected in the second channel, so that the guidewire structure can be adjusted according to the actual movement situation and rotated according to the target position, so that the curved portion 13 can guide the interventional device 100 to the target position for release. The first balloon 12 is located on the outside of the cannula body 21, so that when the guidewire body 11 and the cannula body 21 slide relative to each other, it will not affect the contraction and expansion of the first balloon 12. The tail of the guidewire body 11 extends from the tail of the cannula body 21 and is connected to the first three-way structure 14 to prevent the first three-way structure 14 from affecting the movement of the guidewire body 11 in the cannula body 21.

[0079] In some embodiments, reference Figure 1 The sleeve structure also includes a second three-way structure 23, which is used to exchange gas and liquid with the outside world. The second three-way structure 23 is arranged at the tail of the sleeve body 21 and is connected to the cavity 25 through the connecting hole 26. At the same time, the second three-way structure 23 can be connected to the liquid pump and the gas pump outside to transport liquid or gas into the cavity 25 in the sleeve body 21. For example, syringes are connected to the two tails of the second three-way structure 23 respectively. When the second balloon 22 needs to maintain a contracted state before puncture, the air in the second balloon 22 is extracted through the cavity 25 by using an air syringe to shrink the second balloon 22; when the second balloon 22 needs to expand, the developer is injected into the second balloon 22 through the cavity 25 by using a liquid syringe to expand the second balloon 22. The second three-way structure 23 can adjust the second balloon 22 according to different usage requirements to achieve the release of the adhesion area and ensure a smooth operation.

[0080] Reference Figure 1 , Figure 4 , the two ends of the elastic structure 3 are respectively connected to the guidewire body 11 and the sleeve body 21, and are used to push the interventional device 100 to move in the adhesion area. For example, when the guidewire body 11 encounters a narrow area, the first balloon 12 is inflated to fix the position of the guidewire body 11, and the sleeve body 21 is pushed to move forward along the guidewire body 11, and the elastic structure 3 is compressed; the second balloon 22 is inflated to fix the position of the sleeve body 21, and the first balloon 12 is contracted. At this time, the guidewire body 11 loses the fixing effect of the first balloon 12, and is pushed by the elastic force of the elastic structure 3 to move forward along the guiding direction of the curved portion 13, so that the interventional device 100 can enter the narrow space and realize the movement of the interventional device 100 in the adhesion area. At the same time, the elastic structure 3 can prevent the guidewire structure from being separated from the sleeve structure, and avoid the accident of the guidewire structure or the sleeve structure falling off in the body.

[0081] The elastic structure 3 is made of biocompatible metal to avoid affecting the patient's body tissue, and its structure can be a spring structure or other elastic structure. The elastic structure 3 can be arranged as a single structure around the guide wire body 11, or as a plurality of elastic components evenly arranged around the central axis of the guide wire body 11.

[0082] Figure 7 is an enlarged schematic diagram of structure D when the interventional device is placed in the puncture needle. During actual treatment, the interventional device 100 needs to be moved to the target position with the assistance of the puncture needle 200, and can be used to release adhesions and move electrodes. For example, refer to Figure 6 , Figure 7 When the interventional device 100 enters the puncture needle 200, the first balloon 12 and the second balloon 22 are in a contracted state to prevent the first balloon 12 and the second balloon 22 from occupying too much space due to the narrow passage in the puncture needle 200 and affecting the movement of the interventional device 100 in the puncture needle 200. During the complete treatment process, the first three-way structure 14 and the second three-way structure 23 are always located outside the puncture needle 200, which is convenient for controlling the gas and liquid in the interventional device 100.

[0083] Reference Figure 8 The embodiment of the present invention provides an adhesion release method, which is based on the above-mentioned epidural intervention device 100 and is used to release the epidural adhesion area and expand the electrode puncture target position so that the electrode can achieve its therapeutic effect. The adhesion release method includes:

[0084] Step S110: Puncture the puncture needle to the outside of the adhesion area or near the adhesion area.

[0085] The interventional device 100 needs to enter the human body with the assistance of the puncture needle 200 and move along the inner channel of the puncture needle 200. When performing puncture, it is necessary to use X-rays for development positioning to determine the target area for electrode placement and the puncture position of the puncture needle 200. According to actual conditions, the puncture position of the puncture needle 200 may be outside the adhesion area outside the spinal dura mater or near the adhesion area. When the target position is outside the adhesion area, the interventional device 100 can reach the adhesion area after passing through the puncture needle 200 to release it. When the target position is near the adhesion area, it is often because the tissue cavity near the adhesion area has more gaps, and it does not need to be caused by the puncture needle 200. A large wound can be reached by moving the interventional device 100. At this time, after the interventional device 100 passes through the puncture needle 200, it needs to move for a period of time to reach the adhesion area.

[0086] Step S120: extracting the air in the interventional device.

[0087] Reference Figure 6Since the passage in the puncture needle 200 is relatively narrow, the air in the interventional device 100 needs to be extracted to prevent it from affecting the movement of the interventional device 100 in the puncture needle 200, and also to prevent the air in the interventional device 100 from affecting the development effect and the swelling effect when injecting the developer into the first balloon 12 and the second balloon 22. The air in the interventional device 100 is extracted through one end of the first three-way structure 14 and the second three-way structure 23 for extracting air, so that the first passage 16, the first balloon 12 and the cavity 25, and the second balloon 22 are in a vacuum state, and the interventional device 100 can smoothly enter the internal passage of the puncture needle 200.

[0088] Step S130: Move the interventional device through the inner channel of the puncture needle and allow the first balloon and the second balloon to pass through the puncture needle.

[0089] Reference Fig.10 The air-evacuated interventional device 100 is moved to the outside of the puncture needle 200 through the channel of the puncture needle 200. Since the channel inside the puncture needle 200 is narrow, the first balloon 12 and the second balloon 22 cannot expand inside the puncture needle 200, so they need to be moved to the outside of the puncture needle 200.

[0090] Step S140: Move the interventional device to the inside of the adhesion area, inject liquid into the first balloon to gradually expand the first balloon, and loosen the adhesion area.

[0091] The front end of the interventional device 100 is moved to the inside of the adhesion area, and the adhesion area is loosened by expanding the first balloon 12. According to the actual situation, when the adhesion area is large, the second balloon 22 needs to be expanded to cooperate with the first balloon 12 to achieve loosening, so as to achieve a better loosening effect.

[0092] Specifically, refer to Fig. 9 , moving the interventional device 100 to the inside of the adhesion area includes the following steps:

[0093] Step S141: rotating the interventional device so that the curved portion faces the adhesion area to be released.

[0094] Due to the influence of the obstruction of the adhesion area, the interventional device 100 is often a certain distance and offset from the target area after extending the puncture needle 200, so it is necessary to adjust the position of the interventional device 100 and move it to the side close to the target area. The interventional device 100 is rotated so that the curved portion 13 of the guide wire structure faces the adhesion area to be loosened, and the movement of the interventional device 100 is guided by the curved portion 13 so that the interventional device 100 can gradually move toward the target area for loosening. Since the adhesion area will cause obstruction to the interventional device 100 and reduce the damage to the patient's body caused by the movement, it is necessary to move the interventional device 100 through the cooperation of the guide structure with the sleeve structure and the elastic structure 3.

[0095] Step S142: injecting liquid into the first balloon to expand the first balloon.

[0096] The developer is injected into the first balloon 12 along the first three-way structure 14, the opening of the first channel 16, the first channel 16, and the first injection hole 15 through one end of the first three-way structure 14 connected to the developer, so that the first balloon 12 expands. Fig.11 When the first balloon 12 is inflated, the first balloon 12 will expand part of the adhesion area. Due to the compression between the first balloon 12 and the adhesion tissue, the first balloon 12 can fix the position of the guidewire structure.

[0097] In other cases, the gap in the adhesion tissue is too narrow to fully expand the first balloon 12 at one time. In this case, only a portion of the developer can be injected into the first balloon 12 to partially expand the first balloon 12 and expand the gap, and then the developer is withdrawn to shrink the first balloon 12. The operation is repeated until the gap is expanded, and then a sufficient amount of developer can be injected to fully expand the first balloon 12.

[0098] Step S143: Push the sleeve body toward the first balloon to slide and compress the elastic structure.

[0099] Reference Fig.12 After the first balloon 12 fixes the position of the guidewire structure, it pushes the sleeve body 21. At this time, the sleeve body 21 can move along the guidewire body 11 toward the first balloon 12, so that the distance between the first balloon 12 and the second balloon 22 is shortened and the elastic structure 3 is compressed.

[0100] Step S144: injecting liquid into the second balloon to expand the second balloon.

[0101] The developer is injected into the second balloon 22 along the second three-way structure 23, the connecting hole 26, the cavity 25, and the second injection hole 24 through one end of the second three-way structure 23 connected to the developer, so that the second balloon 22 expands. Fig.13When the second balloon 22 is inflated, the second balloon 22 will expand part of the adhesion area. Due to the compression between the second balloon 22 and the adhesion tissue, the second balloon 22 can fix the position of the guidewire structure.

[0102] Step S145: extracting the liquid in the first balloon to shrink the first balloon, and the elastic structure pushes the guidewire body and the first balloon to move toward the bending portion.

[0103] The developer injected into the first balloon 12 is extracted through one end of the first three-way structure 14 connected to the developer, so that the first balloon 12 shrinks. Fig.14 At this time, the guidewire structure loses the positioning of the first balloon 12 and moves under the elastic force of the elastic structure 3. Since the curved portion 13 is located at the front end of the guidewire body 11 and is wrapped by the surrounding adhesion tissue, the guidewire structure will move in the direction guided by the curved portion 13 due to the guidance of the curved portion 13 and the obstruction of the adhesion tissue, and further move the interventional device 100 to the target area.

[0104] Step S146: extracting the liquid in the second balloon to shrink the second balloon.

[0105] The developer injected into the second balloon 22 is extracted through one end of the second three-way structure 23 connected to the developer, so that the second balloon 22 shrinks. Fig.15 At this time, the first balloon 12 and the second balloon 22 are both in a contracted state, and the overall diameter of the interventional device 100 is reduced, so that it can enter the gap expanded by the loosening of the first balloon 12 and the second balloon 22, thereby achieving further movement of the interventional device 100.

[0106] Step S147: Repeat the above steps until the interventional device moves to the adhesion area to be released.

[0107] The orientation of the curved portion 13 is adjusted, and the interventional device 100 is advanced in the adhesion area by alternately expanding and contracting the first balloon 12 and the second balloon 22, and the first balloon 12 enters the target area. According to actual conditions, when the adhesion area is large, the second balloon 22 needs to be expanded together to achieve a better release effect, expand enough placement space for the electrode, and ensure smooth operation.

[0108] Step S150: extract the liquid in the first balloon to shrink the first balloon, and remove the interventional device through the puncture needle.

[0109] After the release is completed, the developer in the first balloon 12 is extracted through the first injection hole 15, the first channel 16, and the opening of the first channel 16, so that the first balloon 12 shrinks to a vacuum state, which facilitates the removal of the interventional device 100 from the puncture needle 200. According to actual conditions, when the first balloon 12 and the second balloon 22 are used for release, the developer in the first balloon 12 and the second balloon 22 needs to be completely extracted, so that the overall diameter of the interventional device 100 is reduced for easy removal.

[0110] After the interventional device 100 is removed, the electrodes are placed in the target area along the inner channel of the puncture needle 200 and the space expanded by the interventional device 100 to test the therapeutic effect. After the therapeutic effect is achieved, the puncture needle 200 is removed, the electrode placement is completed, and the next surgical operation is performed.

[0111] Reference Fig.16 The embodiment of the present invention provides an electrode moving method, which is based on the above-mentioned epidural intervention device 100 and is used to push the electrode with a position deviation from the side to the target position so that the electrode can achieve its therapeutic effect. The electrode moving method includes:

[0112] Step S210: insert the puncture needle to the vicinity of the electrode.

[0113] X-ray imaging positioning is performed, and the target area where the interventional device 100 is placed and the puncture position of the puncture needle 200 are determined according to the placement position of the electrode. According to the actual situation, the puncture position of the puncture needle 200 may be the side where the electrode is away from the target position or near the side where the electrode is away from the target position. When the target position is the side where the electrode is away from the target position, the interventional device 100 can reach the target area after passing through the puncture needle 200, and the electrode is pushed to the target position by the expansion of the first balloon 12. When the target position is near the side where the electrode is away from the target position, it is often because the tissue cavity near it has more gaps, and it does not need to be caused by the puncture needle 200. A large wound can be reached by moving the interventional device 100. At this time, after the interventional device 100 passes through the puncture needle 200, it needs to move for a period of time to reach the target area.

[0114] Step S220: extracting the air from the interventional device.

[0115] Reference Figure 6 Since the passage in the puncture needle 200 is relatively narrow, it is necessary to extract the air in the interventional device 100 to prevent it from affecting the movement of the interventional device 100 in the puncture needle 200, so that the interventional device 100 can smoothly enter the passage inside the puncture needle 200. At the same time, extracting the air can also prevent the air in the interventional device 100 from affecting the development effect and the swelling effect when injecting the developer into the first balloon 12 and the second balloon 22.

[0116] Step S230: Move the interventional device through the inner channel of the puncture needle and allow the first balloon and the second balloon to pass through the puncture needle.

[0117] Reference Fig.10 , the interventional device 100 with air evacuated is moved to the outside of the puncture needle 200 through the channel of the puncture needle 200 to prevent it from affecting the expansion of the first balloon 12 and the second balloon 22.

[0118] Step S240: Move the interventional device to the side of the electrode away from the target position, inject liquid into the first balloon to gradually expand the first balloon, and push the electrode to move to the target position.

[0119] Reference Fig.18 , move the front end of the interventional device 100 to a position on the side of the electrode away from the target position, and push the electrode by expanding the first balloon 12. According to actual conditions, when the adhesion area is large or the electrode is long, it is necessary to expand the second balloon 22 to work together with the first balloon 12 to push the electrode so that the electrode can be completely and effectively moved to the target position.

[0120] Specifically, refer to Fig.17 Moving the interventional device 100 to a side of the electrode away from the target position comprises the following steps:

[0121] Step S241: Rotate the interventional device so that the curved portion faces a direction where the electrode is away from the target area.

[0122] Considering that the offset of electrode placement is often caused by the obstruction of the adhesion area, the interventional device 100 will encounter obstruction of the adhesion area after extending the puncture needle 200, and its position after extending the puncture needle 200 is usually a certain distance and offset from the target area. At this time, it is necessary to adjust the position of the interventional device 100 and move it to the side close to the target area. The interventional device 100 is rotated so that the curved portion 13 of the guide wire structure faces the target area, and the movement of the interventional device 100 is guided by the curved portion 13 so that the interventional device 100 can gradually move toward the target area to push the electrode. Since the adhesion area will cause obstruction to the interventional device 100 and reduce the damage to the patient's body caused by the movement, it is necessary to move the interventional device 100 through the cooperation of the guide structure with the sleeve structure and the elastic structure 3.

[0123] Step S242: injecting liquid into the first balloon to expand the first balloon.

[0124] The developer is injected into the first balloon 12 through the first three-way structure 14 connected to one end of the developer, so that the first balloon 12 expands. Fig.11When the first balloon 12 is inflated, the first balloon 12 will expand part of the adhesion area. Due to the compression between the first balloon 12 and the adhesion tissue, the first balloon 12 can fix the position of the guidewire structure.

[0125] In other cases, the gap in the adhesion tissue is too narrow to fully expand the first balloon 12 at one time. In this case, only a portion of the developer can be injected into the first balloon 12 to partially expand the first balloon 12 and expand the gap, and then the developer is withdrawn to shrink the first balloon 12. The operation is repeated until the gap is expanded, and then a sufficient amount of developer can be injected to fully expand the first balloon 12.

[0126] Step S243: Push the sleeve body toward the first balloon to slide and compress the elastic structure.

[0127] Reference Fig.12 After the first balloon 12 fixes the position of the guidewire structure, it pushes the sleeve body 21. At this time, the sleeve body 21 can move along the guidewire body 11 toward the first balloon 12, so that the distance between the first balloon 12 and the second balloon 22 is shortened and the elastic structure 3 is compressed.

[0128] Step S244: injecting liquid into the second balloon to expand the second balloon.

[0129] The developer is injected into the second balloon 22 through the second three-way structure 23 connected to one end of the developer, so that the second balloon 22 expands. Fig.13 When the second balloon 22 is inflated, the second balloon 22 will expand part of the adhesion area. Due to the compression between the second balloon 22 and the adhesion tissue, the second balloon 22 can fix the position of the guidewire structure.

[0130] Step S245: extracting the liquid in the first balloon to shrink the first balloon, and the elastic structure pushes the guide wire body and the first balloon to move toward the bending portion.

[0131] The developer injected into the first balloon 12 is extracted through one end of the first three-way structure 14 connected to the developer, so that the first balloon 12 shrinks. Fig.14 At this time, the guide wire structure is pushed by the elastic force of the elastic structure 3 and moves in the direction guided by the curved portion 13, further causing the interventional device 100 to move toward the target area.

[0132] Step S246: extracting the liquid in the second balloon to shrink the second balloon.

[0133] The developer injected into the second balloon 22 is extracted through one end of the second three-way structure 23 connected to the developer, so that the second balloon 22 shrinks. Fig.15At this time, the first balloon 12 and the second balloon 22 are both in a contracted state, and the overall diameter of the interventional device 100 is reduced, so that it can enter the gap expanded by the loosening of the first balloon 12 and the second balloon 22, thereby achieving further movement of the interventional device 100.

[0134] Step S247: Repeat the above steps until the interventional device moves to the side where the electrode is away from the target position.

[0135] Adjust the orientation of the curved portion 13, and propel the interventional device 100 in the adhesion area by alternately expanding and contracting the first balloon 12 and the second balloon 22, and make the first balloon 12 enter the target area, that is, the side of the electrode away from the target position. According to actual conditions, when the adhesion area is large or the electrode is long, the second balloon 22 needs to be expanded together to achieve a better pushing effect, move the electrode to the target position, and ensure smooth operation.

[0136] Step S250: extract the liquid in the first balloon to shrink the first balloon, and remove the interventional device through the puncture needle.

[0137] After the electrode is moved, the treatment effect is tested to verify whether the electrode has moved to an effective position. After the treatment effect is achieved, the developer in the first balloon 12 is extracted, and the first balloon 12 is contracted to a vacuum state, so that the intervention device 100 can be easily removed from the puncture needle 200. According to the actual situation, when the first balloon 12 and the second balloon 22 are used to push, it is necessary to completely extract the developer in the first balloon 12 and the second balloon 22, so that the overall diameter of the intervention device 100 is reduced for easy removal. After the intervention device 100 is removed, the puncture needle 200 is removed, the electrode is inserted, and the next surgical operation is performed.

[0138] The embodiments of the present invention provide an epidural interventional device, an adhesion release method, and an electrode movement method, wherein the interventional device includes a guidewire structure, a sleeve structure, and an elastic structure. The guidewire structure includes a guidewire body and a first balloon, and the sleeve structure includes a sleeve body and a second balloon. The two ends of the elastic structure are respectively connected to the guidewire body and the sleeve body. The guidewire structure cooperates with the sleeve structure, and the elastic structure pushes the interventional device to enter a narrow space, and the first balloon and the second balloon can release the epidural adhesion area, expand the electrode puncture target position, and ensure the smooth completion of the operation.

[0139] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An epidural interventional device, characterized in that: The interventional device (100) comprises: A guidewire structure, comprising a guidewire body (11) and a first balloon (12), wherein a first channel (16) having an opening is provided inside the guidewire body (11), and the first balloon (12) is wrapped around the outside of the guidewire body (11) and close to the front end of the guidewire body (11); A cannula structure, comprising a cannula body (21) and a second balloon (22), wherein the second balloon (22) is wrapped around the outside of the cannula body (21) and is located at the front end of the cannula body (21), a second through passage is provided inside the cannula body (21), the guide wire body (11) is movably connected in the second passage, the first balloon (12) is located outside the cannula body (21), and the tail of the guide wire body (11) extends out from the tail of the cannula body (21); An elastic structure (3), two ends of which are respectively connected to the guidewire body (11) and the sleeve body (21), and the elastic structure (3) is used to cooperate with the first balloon (12) and the second balloon (22) to achieve relative movement between the guidewire structure and the sleeve structure; When the interventional device (100) is moved, the first balloon (12) is inflated to fix the position of the guidewire body (11), and the sleeve body (21) is pushed forward along the guidewire body (11) to compress the elastic structure (3), fix the position of the sleeve body (21) and shrink the first balloon (12), so that the guidewire body (11) is pushed forward by the elastic force of the elastic structure (3), thereby realizing the movement of the interventional device (100).

2. The interventional device according to claim 1, characterized in that The front end of the guide wire body (11) is provided with a curved portion (13), and the curved portion (13) is arranged outside the first balloon (12).

3. The interventional device according to claim 1, characterized in that: The guidewire structure further comprises a first three-way structure (14), wherein the first three-way structure (14) is arranged at the rear of the guidewire body (11) and is connected to the first channel (16) through an opening of the first channel (16).

4. The interventional device according to claim 1, characterized in that: The sleeve structure further comprises a second three-way structure (23), the second three-way structure (23) being arranged at the rear of the sleeve body (21), the sleeve body (21) having an annular cavity (25) arranged outside the second channel, the cavity (25) being not connected to the second channel, the cavity (25) being provided with a connecting hole (26), and the second three-way structure (23) being connected to the cavity (25) via the connecting hole (26).

5. The interventional device according to claim 1, characterized in that: The portion of the guidewire body (11) wrapped by the first balloon (12) is provided with at least one first injection hole (15), and the first channel (16) of the guidewire body (11) is connected to the first balloon (12) through the first injection hole (15).

6. The interventional device according to claim 4, characterized in that: The portion of the sleeve body (21) wrapped by the second balloon (22) is provided with at least one second injection hole (24), and the cavity (25) of the sleeve body (21) is connected to the second balloon (22) through the second injection hole (24).

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