Removable spring ring system for electrified coagulation plug

Abstract

The invention discloses a detachable spring ring system for an electrified coagulation thrombus plug. The detachable spring ring system comprises a conveying pipe and a hollow tubular structure, the electric conducting wire is arranged in the conveying pipe; the embolism spring ring is arranged at one end of the conveying pipe; the releasing part is located at one end, close to the conveying pipe, in the embolism spring ring and is used for connecting the embolism spring ring and the electric conducting wire, and a plurality of placement windows are formed in the peripheral side of the releasing part; according to the detachable spring ring system for the electrified coagulation thrombus plug, rapid switching of electrocoagulation and release is completed by switching the positive electrode and the negative electrode of the electric release device, release is conducted at the first time after electrocoagulation is completed, the interference factors of the environment on hydrolysis of the polylactic acid coating are reduced, the surgical risk can be reduced, and meanwhile the surgical efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of detachable spring coils, and in particular relates to a detachable spring coil system for electrically coagulating embolism. Background Art

[0002] The routine operation of interventional embolization for aneurysms is to insert a microcatheter at the base of the patient's thigh, and place the embolic material along the microcatheter into the aneurysm cavity through a delivery device, causing thrombosis in the aneurysm cavity, reducing blood flow in the aneurysm, and thus achieving the purpose of curing the aneurysm. It has been confirmed that the occlusion effect can be increased by electrocoagulating blood on the coil, but during the implementation process, the high temperature generated by electrocoagulation will interfere with the release, the viscosity and flow rate of the blood make the resistance unstable, the time of electrocoagulation cannot be determined, the coating of the release area is decomposed by heat in advance, or the coating of the release area cannot be decomposed immediately after the electrocoagulation is completed, which will cause great interference to the operation. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention aims to provide a detachable spring coil system for electrically coagulating embolism.

[0004] The technical solution adopted by the present invention is:

[0005] An electrically embolic thrombotic detachable coil system comprising

[0006] Delivery pipe, a hollow tubular structure;

[0007] An electric conductive wire is arranged inside the conveying tube;

[0008] An embolic spring coil is arranged at one end of the delivery tube;

[0009] A release member, located in the embolic spring coil near one end of the delivery tube, used to connect the embolic spring coil and the electrical guide wire, and having a plurality of placement windows on its circumference;

[0010] A polylactic acid coating filled in the placement window;

[0011] A metal core wire is arranged inside the release member;

[0012] The electrolytic release device has a positive and negative electrode electrically connected to the delivery tube and the embolization spring coil respectively, and the positive and negative electrodes can be switched; when the delivery tube is connected to the negative electrode and the embolization spring coil is connected to the positive electrode, the positively charged embolization spring coil attracts the negatively charged components in the blood to produce an electrocoagulation reaction; when the delivery tube is connected to the positive electrode and the embolization spring coil is connected to the negative electrode, the release piece generates high temperature, and after the polylactic acid coating is hydrolyzed by the high temperature, the metal core wire breaks when it contacts the blood.

[0013] As a preferred embodiment of the present invention, the delivery tube includes a delivery tube 1 and a delivery tube 2, the delivery tube 2 is close to the embolic spring coil, and the delivery tube 1 is located at an end of the delivery tube 2 away from the embolic spring coil. The delivery tubes can be integral or assembled.

[0014] As a preferred embodiment of the present invention, the second delivery tube is a spring structure for improving the flexibility of the delivery tube, and the first delivery tube is a hypotube structure for improving the pushing performance of the delivery tube.

[0015] As a preferred embodiment of the present invention, a connecting seat is detachably installed at one end of the delivery tube one away from the delivery tube two, a conductive wire is provided inside the connecting seat, one end of the conductive wire is welded to the delivery tube one, and the other end of the conductive wire is electrically connected to the electrolytic release device; the conductive wire passes through the connecting seat, and one end of the conductive wire away from the embolization spring coil is electrically connected to the electrolytic release device.

[0016] As a preferred embodiment of the present invention, the conductive wire is provided with an insulating filling, and the insulating filling is slidably connected to the conveying tube.

[0017] As a preferred embodiment of the present invention, a connecting plug is fixedly provided at one end of the release piece close to the insulating filling, a retaining plug is detachably installed at one end of the release piece away from the connecting plug, and both ends of the metal core wire are fixedly connected to the connecting plug and the retaining plug respectively.

[0018] As a preferred embodiment of the present invention, a conductive card is fixedly provided on one end of the retention plug away from the release member, and the conductive card is clamped with one end of the embolic spring coil close to the second delivery tube.

[0019] As a preferred embodiment of the present invention, one end of the conductive wire close to the embolic spring coil is located inside the embolic spring coil, and the connecting plug is fixedly connected to the conductive wire.

[0020] As a preferred embodiment of the present invention, a connecting buckle is fixedly provided on the end of the retention plug away from the connecting plug, an anti-untwisting line is fixedly provided on the connecting buckle, the anti-untwisting line is located in the embolic spring coil, the anti-untwisting line forms a ball head at the end of the embolic spring coil away from the delivery tube 2, and the ball head is fixedly connected to the embolic spring coil.

[0021] As a preferred embodiment of the present invention, the main body of the embolic spring coil is formed by winding an alloy wire, and the material of the alloy wire is one or more of platinum, tungsten, gold, silver, tantalum, nickel-titanium alloy, cobalt-chromium alloy, and platinum-iridium alloy.

[0022] The beneficial effects of the present invention are as follows: as a detachable spring coil system for electrically coagulated embolism, the present invention can quickly switch between electrocoagulation and detachment by switching the positive and negative poles of the electrolytic detacher, and detachment is performed immediately after the electrocoagulation is completed. The hydrolysis of the polylactic acid coating is less susceptible to environmental interference factors, which can reduce surgical risks and improve surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 The present invention Figure 1 Schematic diagram of the electrolytic release device connection structure;

[0026] Figure 3 The present invention Figure 1 Schematic diagram of the embolic coil structure;

[0027] Figure 4 The present invention Figure 3 A schematic cross-sectional structure diagram of ;

[0028] Figure 5 The present invention Figure 1 A schematic diagram of a cross-sectional structure at a connection seat;

[0029] Figure 6 The present invention Figure 4 A schematic diagram of the release member structure;

[0030] Figure 7 The present invention Figure 6 Schematic diagram of the explosion structure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0033] Combine the following Figure 1-7 The specific embodiment of the present invention is described, an electrically embolic thrombotic detachable coil system, comprising

[0034] Delivery pipe, a hollow tubular structure;

[0035] The conductive wire 17 is arranged inside the conveying tube; the conductive wire is cylindrical, and its tip can be tapered or streamlined.

[0036] An embolic spring coil 14 is disposed at one end of the delivery tube;

[0037] The release piece 19 is located inside the embolic spring coil 14 near one end of the delivery tube and is used to connect the embolic spring coil 14 and the conductive wire 17. A plurality of placement windows 22 are provided on its circumferential side. The release piece 19 realizes a release function, that is, the conductive wire 17 is separated from the embolic spring coil 14, the conductive wire 17 is withdrawn from the body, and the embolic spring coil 14 remains at the lesion site for occlusion.

[0038] A polylactic acid coating is filled in the placement window 22;

[0039] A metal core wire 27 is disposed inside the release member 19;

[0040] The electrolytic release device 15 has positive and negative electrodes electrically connected to the delivery tube and the embolization spring coil 14, respectively, and the positive and negative electrodes can be switched; when the delivery tube is connected to the negative electrode and the embolization spring coil 14 is connected to the positive electrode, the positively charged embolization spring coil 14 attracts the negatively charged components in the blood to produce an electrocoagulation reaction; when the delivery tube is connected to the positive electrode and the embolization spring coil 14 is connected to the negative electrode, the release member 19 generates high temperature, and after the polylactic acid coating is hydrolyzed by high temperature, the metal core wire 27 breaks when it contacts the blood. The purpose of the operation is to create an obstruction at the lesion site through blood coagulation and limit the formation of bulges in the lesion area.

[0041] During the electrocoagulation process, the internal resistance is small, the current energy consumption loss is small, the electrocoagulation speed is fast, and the speed at which thrombus is formed on the surface of the embolic spring coil is fast; and the same current loop can realize the electrocoagulation and release steps, only the positive and negative poles of the electrolytic release device 15 need to be switched, and there is no need to add other structural units, which is conducive to reducing equipment costs and reducing treatment costs.

[0042] Advantageously, the delivery tube comprises a delivery tube 12 and a delivery tube 13, wherein the delivery tube 13 is close to the embolic spring coil 14, and the delivery tube 12 is located at an end of the delivery tube 13 away from the embolic spring coil 14. The delivery tubes may be integral or assembled.

[0043] Advantageously, the delivery tube 2 13 is a spring structure for improving the flexibility of the delivery tube, and the delivery tube 1 12 is a hypotube structure for improving the pushing performance of the delivery tube.

[0044] Advantageously, the end of the delivery tube 12 away from the delivery tube 2 13 is detachably mounted with a connection seat 11, a wire 21 is arranged inside the connection seat 11, one end of the wire 21 is welded to the delivery tube 12, and the other end of the wire 21 is electrically connected to the electrolytic release device 15; the electric conductive wire 17 runs through the connection seat 11, and the end of the electric conductive wire 17 away from the embolization spring coil 14 is electrically connected to the electrolytic release device 15. The connection seat 11 is non-conductive and serves to isolate the positive and negative electrodes.

[0045] Advantageously, the conductive wire is provided with an insulating filler 16, and the insulating filler 16 is slidably connected to the conveying pipe. The insulating filler 16 has good high temperature resistance.

[0046] Advantageously, a connection plug 24 is fixedly provided at one end of the release member 19 close to the insulating filler 16, a retention plug 23 is detachably installed at one end of the release member 19 away from the connection plug 24, and two ends of the metal core wire 27 are respectively fixedly connected to the connection plug 24 and the retention plug 23. The area where the release member 19 is located forms a release zone.

[0047] Advantageously, a conductive card 25 is fixedly provided at one end of the retention plug 23 away from the release member 19, and the conductive card 25 is clamped with one end of the embolic spring coil 14 close to the delivery tube 2 13. The toothed portion on the circumferential side of the conductive card 25 cooperates with the spiral gap at the end of the embolic spring coil 14, and the two will not fall off after being clamped, and the conductive card 25 is allowed to tilt slightly.

[0048] Advantageously, one end of the conductive wire 17 close to the embolic spring coil 14 is located inside the embolic spring coil 14, and the connecting plug 24 is fixedly connected to the conductive wire 17. The conductive wire 17 delivers all the required embolic spring coils 14 to the designated location through the delivery tube. Before delivery is completed, the embolic spring coil 14 is located inside the delivery tube, and the diameter of the embolic spring coil 14 is slightly smaller than the diameter of the delivery tube. The embolic spring coil 14 and the delivery tube are both allowed to deform to a certain extent. When the embolic spring coil 14 is inside the delivery tube, the two squeeze each other, and the embolic spring coil 14 returns to its original state after leaving the delivery tube.

[0049] Advantageously, a connection buckle 26 is fixedly provided at one end of the retention plug 23 away from the connection plug 24, an anti-untwisting line 20 is fixedly provided on the connection buckle 26, the anti-untwisting line 20 is located in the embolic spring coil 14, the anti-untwisting line 20 forms a ball head 18 at one end of the embolic spring coil 14 away from the delivery tube 2 13, and the ball head 18 is fixedly connected to the embolic spring coil 14. The anti-untwisting line 20 has a certain heat resistance and will not decompose when heated.

[0050] Advantageously, the main body of the embolic spring coil 14 is formed by winding an alloy wire, and the material of the alloy wire is one or more of platinum, tungsten, gold, silver, tantalum, nickel-titanium alloy, cobalt-chromium alloy, and platinum-iridium alloy.

[0051] Working principle of the present invention:

[0052] During electrocoagulation, the delivery tube is connected to the negative electrode, and the embolization spring coil 14 is connected to the positive electrode; the current flows from the electrolytic release device 15 to the conductive wire 17, and passes through the connecting plug 24, the metal core wire 27, the retention plug 23, and the conductive card 25 in sequence to reach the embolization spring coil 14, and the positively charged embolization spring coil 14 attracts the negatively charged components in the blood to undergo electrocoagulation, so as to rapidly embolize the aneurysm; the part of the embolization spring coil 14 in contact with the blood forms a high temperature, and the current flows from the blood between the embolization spring coil 14 and the delivery tube 2 13 to the delivery tube 2 13 and the delivery tube 1 12, and then flows to the negative electrode of the electrolytic release device 15;

[0053] During this process, when the current passes through the insulating filling 16, the insulating filling 16 is not conductive, and the current will not flow directly from the conductive wire 17 to the delivery tube 13; the embolic spring coil 14 has a wide contact area with the blood, and the high temperature generated by the embolic spring coil 14 is absorbed by the blood, so the temperature at the release piece 19 is low, the polylactic acid coating will not hydrolyze, the cavity inside the release piece 19 is isolated from the blood, the metal core wire 27 will not break, and the metal core wire 27 can continue to transmit current; and because of its different material, the delivery tube will not generate high temperature when current passes through.

[0054] When releasing, the positive and negative interfaces of the electrolytic release device 15 are switched, the delivery tube is connected to the positive electrode, and the embolization spring coil 14 is connected to the negative electrode; the current flows from the delivery tube 12 and the delivery tube 2 13 to the release area between the delivery tube 2 13 and the embolization spring coil 14, and the current flows to the conductive wire 17 through the blood in the release area. The blood in a small range in the release area generates high temperature, and the release piece 19 is affected by the high temperature. The polylactic acid coating is hydrolyzed, and the blood passes through the anti-unwinding line 20 and enters the release piece 19. The metal core wire 27 contacts the blood, and the metal core wire 27 loses its stable working environment and breaks under the environment of high-temperature blood wrapping and charged flow;

[0055] After the metal core wire 27 breaks, the connecting plug 24 and the release piece 19 are still connected, and the retention plug 23 and the release piece 19 lose their connection. At this time, the conductive wire 17 and the delivery tube 13 can be pulled out, and the retention plug 23, the conductive card 25, the anti-untwisting wire 20 and the embolization spring coil 14 are left in the aneurysm area. After the conductive wire 17 and the delivery tube 13 are withdrawn, the operation is completed.

[0056] In this process, the materials of the delivery tube 12 and the delivery tube 2 13 are different from those of the embolization spring coil 14. When the delivery tube 12 and the delivery tube 2 13 are connected to the positive electrode, the surface of the delivery tube 12 and the delivery tube 2 13 will not generate high temperature, and will not cause the blood in contact with them to be electrocoagulated. When the conductive wire 17 is connected to the negative electrode, before the metal core wire 27 breaks, the connecting plug 24, the metal core wire 27, the retention plug 23, and the conductive card 25 will only allow a small part of the current to flow to the embolization spring coil 14, because the resistance of the blood in contact with the surface of the embolization spring coil 14 increases after electrocoagulation, and most of the current will "take a shortcut" from the blood in the release area, and thus directly flow to the delivery tube 2 13;

[0057] Therefore, the surface of the embolization spring coil 14 no longer generates high temperature, and only the release zone between the delivery tube 13 and the embolization spring coil 14 generates high temperature. Since the high temperature is generated in a small area and the contact range with blood is limited, the temperature of the release zone during release is much higher than the temperature during electrocoagulation. The polylactic acid coating will not be hydrolyzed during release.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An electrically embolic thrombotic detachable coil system, characterized in that: include Delivery pipe, a hollow tubular structure; An electric conductive wire is arranged inside the conveying tube; An embolic spring coil is arranged at one end of the delivery tube; A release member, located in the embolic spring coil near one end of the delivery tube, used to connect the embolic spring coil and the electrical guide wire, and having a plurality of placement windows on its circumference; A polylactic acid coating filled in the placement window; A metal core wire is arranged inside the release member; The electrolytic release device has a positive and negative electrode electrically connected to the delivery tube and the embolization spring coil respectively, and the positive and negative electrodes can be switched; when the delivery tube is connected to the negative electrode and the embolization spring coil is connected to the positive electrode, the positively charged embolization spring coil attracts the negatively charged components in the blood to produce an electrocoagulation reaction; when the delivery tube is connected to the positive electrode and the embolization spring coil is connected to the negative electrode, the release piece generates high temperature, and after the polylactic acid coating is hydrolyzed by the high temperature, the metal core wire breaks when it contacts the blood.

2. The detachable spring coil system for electrically coagulating embolism according to claim 1, characterized in that: The delivery tube includes a delivery tube 1 and a delivery tube 2, wherein the delivery tube 2 is close to the embolic spring coil, and the delivery tube 1 is located at an end of the delivery tube 2 away from the embolic spring coil. The delivery tubes can be integral or assembled.

3. The detachable spring coil system for electrically coagulating embolism according to claim 2, characterized in that: The second delivery tube is a spring structure for improving the flexibility of the delivery tube, and the first delivery tube is a hypotube structure for improving the pushing performance of the delivery tube.

4. The detachable spring coil system for electrically coagulating embolism according to claim 2, characterized in that: A connecting seat is detachably mounted on one end of the delivery tube 1 away from the delivery tube 2, a conducting wire is arranged inside the connecting seat, one end of the conducting wire is welded to the delivery tube 1, and the other end of the conducting wire is electrically connected to the electrolytic releaser; the conductive wire passes through the connecting seat, and one end of the conductive wire away from the embolization spring coil is electrically connected to the electrolytic releaser.

5. The detachable spring coil system for electrically coagulating embolism according to claim 4, characterized in that: The conductive wire is provided with an insulating filler, and the insulating filler is slidably connected to the conveying tube.

6. The detachable spring coil system for electrically coagulating embolism according to claim 5, characterized in that: A connection plug is fixedly provided at one end of the release member close to the insulating filling, and a retention plug is detachably installed at one end of the release member away from the connection plug. Both ends of the metal core wire are fixedly connected to the connection plug and the retention plug respectively.

7. The detachable spring coil system for electrically coagulating embolism according to claim 6, characterized in that: A conductive card is fixedly provided at one end of the retention plug away from the release member, and the conductive card is clamped with one end of the embolic spring coil close to the second delivery tube.

8. The electrically-activated thromboembolic detachable coil system according to claim 7, characterized in that: One end of the conductive wire close to the embolic spring coil is located inside the embolic spring coil, and the connecting plug is fixedly connected to the conductive wire.

9. The detachable spring coil system for electrically coagulating embolism according to claim 8, characterized in that: A connecting buckle is fixedly provided on the end of the retention plug away from the connecting plug, and an anti-untwisting line is fixedly provided on the connecting buckle. The anti-untwisting line is located in the embolic spring coil, and the anti-untwisting line forms a ball head at the end of the embolic spring coil away from the delivery tube 2, and the ball head is fixedly connected to the embolic spring coil.

10. The electrically-activated thromboembolic detachable coil system according to claim 1, characterized in that: The main body of the embolization spring coil is formed by winding an alloy wire, and the material of the alloy wire is one or more of platinum, tungsten, gold, silver, tantalum, nickel-titanium alloy, cobalt-chromium alloy, and platinum-iridium alloy.

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