Electrocoagulation guidewire system for aneurysm embolization

Abstract

The invention discloses an electrocoagulation guidewire system for aneurysm embolization, which comprises a power supply, a positive hypotube and a positive platinum-iridium ring, a PTFE inner insulating layer is arranged between the positive hypotube and the positive platinum-iridium ring, a positive conductive wire is arranged inside the PTFE inner insulating layer, two ends of the positive conductive wire are electrically connected to the positive hypotube and the positive platinum-iridium ring respectively, a negative hypotube and a negative HHS tube are fixedly connected to the outside of the PTFE inner insulating layer, the positive conductive wire is connected to the positive pole of the power supply, the negative hypotube and the negative HHS tube are both connected to the negative pole of the power supply, the negative HHS tube is fixedly connected to the negative hypotube by welding, a same first epoxy glue is arranged between the positive hypotube and the negative hypotube, a same first PET heat shrink tube is fixedly connected to the outside of the positive hypotube and the negative hypotube, a PTFE heat shrink tube is fixedly connected to the outside of the first PET heat shrink tube, the invention is simple to operate, convenient to use and treat, and can meet the use requirements.

Description

Technical field:

[0001] The present invention relates to the technical field of medical devices, and in particular to an electrocoagulation guidewire system for aneurysm embolization. Background technology:

[0002] Cerebral aneurysm is a cystic tumor formed due to structural maldevelopment of the cerebral arterial wall or damage or aging of the arterial wall caused by trauma or arteriosclerosis, which causes the local blood vessel wall to bulge outward. It is the leading cause of subarachnoid hemorrhage and second only to cerebral thrombosis and hypertensive cerebral hemorrhage in cerebrovascular accidents. Cerebral aneurysm is an invisible killer of life. If ruptured, it will cause disability and mortality.

[0003] At present, the treatments for cerebral aneurysms mainly include conservative medical treatment, craniotomy and intravascular interventional treatment. These treatment methods are inconvenient and cannot meet the needs of use. Summary of the invention:

[0004] The object of the present invention is to provide an electrocoagulation guidewire system for aneurysm embolization to solve the deficiencies of the prior art.

[0005] The present invention is implemented by the following technical scheme: it includes a power supply, a positive hypotube and a positive platinum-iridium ring, a PTFE inner insulating layer is arranged between the positive hypotube and the positive platinum-iridium ring, a positive conductive wire is arranged inside the PTFE inner insulating layer, two ends of the positive conductive wire are electrically connected to the positive hypotube and the positive platinum-iridium ring respectively, a negative hypotube and a negative HHS tube are fixedly connected to the outside of the PTFE inner insulating layer, the positive conductive wire is connected to the positive electrode of the power supply, and the negative hypotube and the negative HHS tube are both connected to the negative electrode of the power supply.

[0006] Preferably, the negative electrode HHS tube is fixedly connected to the negative electrode hypotube by welding, and the same first epoxy glue is provided between the positive electrode hypotube and the negative electrode hypotube.

[0007] Preferably, the outer sides of the positive electrode hypotube and the negative electrode hypotube are fixedly connected with the same first PET heat shrink tube, the outer side of the first PET heat shrink tube is fixedly connected with a PTFE heat shrink tube, the first epoxy glue is located on the inner side of the PTFE heat shrink tube, the same second PET heat shrink tube is fixedly connected between the negative electrode hypotube and the negative electrode HHS tube, the outer sides of the negative electrode hypotube and the negative electrode HHS tube are fixedly connected with the same PTFE outer insulating layer, and the second PET heat shrink tube is located on the inner side of the PTFE outer insulating layer.

[0008] Preferably, a second epoxy glue is provided between the positive platinum-iridium ring and the negative HHS tube. The end of the positive platinum-iridium ring is spherical and exposed to the blood, where thrombus is formed. The second PET heat shrink tube is used to stabilize the welding between the negative hypotube and the negative HHS tube, and the first PET heat shrink tube is used to stabilize the adhesion between the two proximal poles.

[0009] Preferably, the first epoxy glue and the second epoxy glue are both made of insulating materials, the first epoxy glue is used to isolate the electrodes of the positive hypotube and the negative hypotube, and the second epoxy glue is used to isolate the electrodes of the positive platinum-iridium ring and the negative HHS tube.

[0010] Preferably, an annular gap is provided on the PTFE outer insulating layer, a negative electrode platinum-iridium ring is arranged in the annular gap, the negative electrode platinum-iridium ring is connected to the negative electrode HHS tube, the negative electrode platinum-iridium ring is exposed to the blood, and the PTFE outer insulating layer is used to isolate the negative electrode from the outside.

[0011] Preferably, aneurysms are movably arranged on the outer sides of the positive electrode platinum-iridium ring, the second epoxy glue and the negative electrode platinum-iridium ring, and there is blood inside the aneurysm.

[0012] Preferably, the PTFE inner insulating layer is made of insulating material, and the PTFE inner insulating layer is used to isolate the positive electrode conductive wire from the electrodes between the negative electrode hypotube and the negative electrode HHS tube, thereby playing a role of internal isolation.

[0013] The advantages of the present invention are as follows: the positive electrode conductive wire adopts a self-loop design, and the current flows from the positive electrode of the positive electrode conductive wire to the negative electrode through the blood, forming a current loop. The positive electrode of the positive electrode conductive wire gathers positive charges, attracts negatively charged white blood cells, red blood cells, platelets and fibrin, etc., and promotes the formation of thrombus. In addition, the positive electrode conductive wire generates heat during the electrification process to denature the thrombus and form a stable thrombus.

[0014] The invention is simple to operate, convenient to use and treat, and can meet usage requirements. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic structural diagram of the electrocoagulation guidewire system for aneurysm embolization of the present invention.

[0017] Figure 2 This is a comparison diagram of output current coordinates obtained by connecting different output resistors of the present invention.

[0018] Figure 3 This is a comparison diagram of the output current coordinates of the present invention when different input resistances are connected.

[0019] In the figure: 1 positive hypotube, 2 first PET heat shrink tube, 3 first epoxy glue, 4 PTFE heat shrink tube, 5 negative hypotube, 6 PTFE outer insulation layer, 7 PTFE inner insulation layer, 8 second PET heat shrink tube, 9 positive conductive wire, 10 negative HHS tube, 11 negative platinum-iridium ring, 12 second epoxy glue, 13 positive platinum-iridium ring, 14 power supply, 15 blood, 16 aneurysm. Specific implementation method:

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1 A drying device for producing manganese silicon alloy comprises a power supply 14, a positive hypotube 1 and a positive platinum-iridium ring 13, a PTFE inner insulating layer 7 is arranged between the positive hypotube 1 and the positive platinum-iridium ring 13, a positive conductive wire 9 is arranged inside the PTFE inner insulating layer 7, two ends of the positive conductive wire 9 are electrically connected to the positive hypotube 1 and the positive platinum-iridium ring 13 respectively, a negative hypotube 5 and a negative HHS tube 10 are fixedly connected to the outside of the PTFE inner insulating layer 7, the positive conductive wire 9 is connected to the positive pole of the power supply 14, the negative hypotube 5 and the negative HHS tube 10 are both connected to the negative pole of the power supply, the negative HHS tube 10 is fixedly connected to the negative hypotube 5 by welding, a first epoxy glue 3 is arranged between the positive hypotube 1 and the negative hypotube 5, a first PET heat shrink tube 2 is fixedly connected to the outside of the positive hypotube 1 and the negative hypotube 5, and a PTFE Heat shrink tube 4, the first epoxy glue 3 is located on the inner side of the PTFE heat shrink tube 4, the same second PET heat shrink tube 8 is fixedly connected between the negative hypotube 5 and the negative HHS tube 10, the outsides of the negative hypotube 5 and the negative HHS tube 10 are fixedly connected with the same PTFE outer insulating layer 6, the second PET heat shrink tube 8 is located on the inner side of the PTFE outer insulating layer 6, the same second epoxy glue 12 is arranged between the positive platinum iridium ring 13 and the negative HHS tube 10, the end of the positive platinum iridium ring 13 is spherical, exposed to the blood 15, and thrombus is formed here, the second PET heat shrink tube 8 is used to stabilize the welding between the negative hypotube 5 and the negative HHS tube 10, the first PET heat shrink tube 2 is used to stabilize the adhesion of the proximal two poles, the voltage of the power supply 14 device of the present application is 9V, and different constant currents can be output. By adjusting the potentiometer, the output current range can be controlled to be 0.94mA~3.79mA.

[0022] In this embodiment, the first epoxy glue 3 and the second epoxy glue 12 are both made of insulating materials. The first epoxy glue 3 is used to isolate the electrodes of the positive hypotube 1 and the negative hypotube 5, and the second epoxy glue 12 is used to isolate the electrodes of the positive platinum-iridium ring 13 and the negative HHS tube 10.

[0023] In this embodiment, an annular gap is opened on the PTFE outer insulating layer 6, and a negative electrode platinum-iridium ring 11 is arranged in the annular gap. The negative electrode platinum-iridium ring 11 is connected to the negative electrode HHS tube 10. The negative electrode platinum-iridium ring 11 is exposed to the blood 15, and the PTFE outer insulating layer 6 is used to isolate the negative electrode from the outside.

[0024] In this embodiment, aneurysms 16 are movably provided on the outer sides of the positive platinum-iridium ring 13 , the second epoxy glue 12 and the negative platinum-iridium ring 11 , and blood 15 is inside the aneurysm 16 .

[0025] In this embodiment, the PTFE inner insulating layer 7 is made of insulating material, and the PTFE inner insulating layer 7 is used to isolate the positive electrode conductive wire 9 from the electrodes between the negative electrode hypotube 5 and the negative electrode HHS tube 10, and plays a role of internal isolation.

[0026] In this embodiment, when in use, the positive platinum-iridium ring 13 and the negative platinum-iridium ring 11 are inserted into the aneurysm 16, and the power supply 14 is started. The positive conductive wire 9 adopts a self-loop design, and the current flows from the positive electrode of the positive conductive wire 9 to the negative electrode through the blood to form a current loop. During the power-on process, positive charges are accumulated at the positive electrode of the positive conductive wire 9, attracting negatively charged white blood cells, red blood cells, platelets and fibrin, etc., to promote the formation of thrombus. In addition, the positive conductive wire 9 generates heat during the power-on process to denature the thrombus and form a stable thrombus. When the input resistance inside the circuit of the present application remains unchanged, after connecting different output resistances, the measured value of the circuit output current is basically maintained. That is to say, after adjusting to the required current, different coagulation currents will not be generated due to different patients (different output resistances). Under the condition that the voltage of power supply 14 remains unchanged at 9V, as the input resistance increases, the output current decreases. The overall guidewire of the present application is 1.8 meters long, and the distance between the two distal electrodes is about 2mm. The maximum cross-sectional diameter of the entire guidewire is 0.0173" (located at the bonding point of the two proximal electrodes, which does not enter the body). The maximum cross-sectional size of the guidewire entering the body is 0.017". Therefore, the guidewire is not compatible with 0.017" microcatheters, but is compatible with 0.021", 0.027" and 0.029" microcatheters.

[0027] In addition, the voltage of the power supply device of the present invention is 9V, and different constant currents can be output. By adjusting the potentiometer, the output current can be controlled to be in the range of 0.94mA to 3.79mA. In order to verify whether the output current of the power supply device is constant, the currents obtained by connecting different output resistors are compared. Figure 2The output current obtained by connecting to different output resistances. The dark dots are the calculated values, and the light dots are the measured values. It can be seen from the figure that when the input resistance inside the circuit remains unchanged, after connecting different output resistances, the measured value of the output current of the circuit basically remains unchanged and is basically the same as the theoretically calculated value. That is to say, after adjusting to the required current, the electrocoagulation current will not vary due to differences in patients (different output resistances).

[0028] This power supply device can adjust the output current of the circuit. That is to say, the device has different current gears, and the adjustable range of the current is 0.94 mA to 3.79 mA. Adjusting the output current is achieved by changing the input resistance inside the circuit. Figure 3 The output current at different input resistances. It can be seen from the figure that under the condition that the power supply voltage remains unchanged at 9 V, as the input resistance increases, the output current decreases, and the measured value basically coincides with the theoretically calculated value.

[0029] In short, the electrocoagulation current of this power supply device is adjustable. Once adjusted to the required current, this current will not change due to differences in patients, and the output of this current is constant.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electrocoagulation guidewire system for aneurysm embolization, comprising a power source (14), a positive hypotube (1) and a positive platinum-iridium ring (13), characterized in that: A PTFE inner insulating layer (7) is provided between the positive hypotube (1) and the positive platinum-iridium ring (13); a positive conductive wire (9) is provided inside the PTFE inner insulating layer (7); two ends of the positive conductive wire (9) are electrically connected to the positive hypotube (1) and the positive platinum-iridium ring (13), respectively; a negative hypotube (5) and a negative HHS tube (10) are fixedly connected to the outside of the PTFE inner insulating layer (7); a first epoxy glue (3) is provided between the positive hypotube (1) and the negative hypotube (5); A second epoxy adhesive (12) is provided between the positive electrode platinum-iridium ring (13) and the negative electrode HHS tube (10); a first PET heat shrink tube (2) is fixedly connected to the outer sides of the positive electrode hypotube (1) and the negative electrode hypotube (5); a second PET heat shrink tube (8) is fixedly connected between the negative electrode hypotube (5) and the negative electrode HHS tube (10); the positive electrode conductive wire (9) is connected to the positive electrode of the power supply (14), and the negative electrode hypotube (5) and the negative electrode HHS tube (10) are both connected to the negative electrode of the power supply.

2. The electrocoagulation guidewire system for aneurysm embolization according to claim 1, characterized in that: A PTFE heat shrink tube (4) is fixedly connected to the outside of the first PET heat shrink tube (2), and the first epoxy adhesive (3) is located on the inside of the PTFE heat shrink tube (4).

3. The electrocoagulation guidewire system for aneurysm embolization according to claim 1, characterized in that: The outer sides of the negative electrode hypotube (5) and the negative electrode HHS tube (10) are both fixedly connected to the same PTFE outer insulating layer (6), and the second PET heat shrink tube (8) is located on the inner side of the PTFE outer insulating layer (6).

4. The electrocoagulation guidewire system for aneurysm embolization according to claim 3, characterized in that: The first epoxy adhesive (3) and the second epoxy adhesive (12) are both made of insulating materials.

5. The electrocoagulation guidewire system for aneurysm embolization according to claim 3, characterized in that: The PTFE outer insulating layer (6) is provided with an annular notch, a negative electrode platinum-iridium ring (11) is arranged in the annular notch, and the negative electrode platinum-iridium ring (11) is connected to the negative electrode HHS tube (10).

6. The electrocoagulation guidewire system for aneurysm embolization according to claim 5, characterized in that: An aneurysm (16) is movably arranged on the outside of the positive electrode platinum-iridium ring (13), the second epoxy glue (12) and the negative electrode platinum-iridium ring (11), and blood (15) is contained inside the aneurysm (16).

7. The electrocoagulation guidewire system for aneurysm embolization according to claim 1, characterized in that: The PTFE inner insulating layer (7) is made of insulating material.

8. The electrocoagulation guidewire system for aneurysm embolization according to claim 1, characterized in that: The voltage of the power supply (14) is 9V.

9. The electrocoagulation guidewire system for aneurysm embolization according to claim 8, characterized in that: The power supply (14) can control the output current to be in the range of 0.94 mA to 3.79 mA by adjusting the potentiometer.

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