Screw propulsion type recanalization catheter for chronic vascular occlusion and operation method of screw propulsion type recanalization catheter

Abstract

The invention provides a spiral push type recanalization catheter for chronic vascular occlusion and an operation method of the spiral push type recanalization catheter, and relates to the field of vascular occlusion conduction. The device comprises a handle, the front end of the handle is fixedly connected with an outer sleeve; the inner side of the outer sleeve is externally connected with a suction machine; a drilling device is arranged at the end of the outer sleeve; and the inner side surface of the handle is slidably connected with a push-pull device. The intravascular stent is arranged to be in a sectional type, the supporting area is increased, meanwhile, the proper length can be selected according to actual needs, use is convenient, the expanding stent is expanded when the pulling bag is expanded through the arranged expanding stent and the elastic connecting piece, the area is increased, the amount of pulled-back blockages is increased, the blockages are rapidly sucked, and the use effect is good. The intravascular stent and the drilling device are integrally arranged, so that more choices are provided for doctors according to actual conditions when the intravascular stent is used, and the intravascular stent is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of vascular occlusion recanalization, specifically to a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method. Background Technology

[0002] Chronic vascular occlusion refers to the gradual narrowing or complete blockage of blood vessels over a long period of time, usually caused by factors such as arteriosclerosis. This leads to restricted blood flow, thus requiring vascular recanalization surgery to open the blood vessels. During vascular recanalization surgery, doctors usually assess and decide in advance whether it is necessary to remove the blockage or place a stent, based on imaging examinations and the patient's specific condition. This decision is usually made during the surgery based on real-time imaging and further assessment of the condition.

[0003] Although doctors can determine the nature and extent of the blockage based on imaging assessments before surgery, the decision to aspirate the blockage or place a stent is usually made during the procedure based on the actual situation. However, the available instruments for placing a stent and aspirating the blockage are two different types, requiring switching between them depending on the circumstances. For example, if it is found that aspiration cannot be performed and a stent needs to be placed, the aspiration device needs to be removed and the stent device extended from the outer cannula to the blood vessel where the stent needs to be placed. However, if there are many bends in the blood vessel and the vessel is long, the operation time will be prolonged and complicated. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method, solving the problem of needing to replace devices according to actual conditions.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a spiral-push recanalization catheter for chronic vascular occlusion and its operation method, comprising a handle; an outer cannula fixedly connected to the front end of the handle; an aspiration machine connected to the inner side of the outer cannula; a drilling device provided at the end of the outer cannula; a push-pull device slidably connected to the inner surface of the handle; a sealing balloon fixedly connected to the outer wall of the outer cannula at the end; a shell movably connected to the inner surface of the outer cannula; a tension tube slidably connected to the inner surface of the shell; a vascular stent installed on the outer wall of the tension tube and the inner wall of the shell, the vascular stent being configured in two sections; and a control button installed on the inner wall surface of the handle.

[0006] Preferably, the drilling device includes a drill bit, an opening support, a pull-out bladder, a motor, a fixing plate, and an elastic connector; the pull-out bladder is fixedly connected to the outer wall surface at the end of the stretching tube; the interior of the pull-out bladder communicates with the interior space of the stretching tube; the motor is fixedly connected to the inner surface at the end of the stretching tube; and the drill bit is fixedly connected to the output end of the motor.

[0007] Preferably, the fixed plate is fixedly connected to the end of the stretching tube, and the opening bracket is movably connected to the inner wall surface of the fixed plate through short pins on both sides of one end; the middle position of the opening bracket is fixedly connected to the outer wall of the pull-out bag, and the elastic connector is fixedly connected between the opening brackets.

[0008] Preferably, the push-pull device includes a first slider, a fixed block, a second slider, a pull rod, a sliding block, a sliding rod, a spring, and a rotating rod; the first slider is slidably connected to the inner surface of the handle; the second slider is limited to the inner surface of the first slider by the pull rod; the fixed block is fixedly connected to the lower surface of the first slider; the lower end of the fixed block penetrates the outer wall surface of the casing and is fixedly connected to the outer wall surface of the tension tube.

[0009] Preferably, one end of the sleeve is fixedly connected to the side surface of the second slider; the sliding block is slidably connected to the inner side wall surface of the first slider; the sliding rod is fixedly connected to the side surface of the sliding block; and the spring is sleeved on the side surface of the sliding rod.

[0010] Preferably, one end of the spring is fixedly connected to the side surface of the sliding block; the other end of the spring is fixedly connected to the inner surface of the first slider; the rotating rod is rotatably connected to the inner surface of the sliding block; and the pulling rod is fixedly connected to both ends of the rotating rod.

[0011] Preferably, the outer sleeve is provided with a pipe that communicates with the interior of the sealing bladder; the sealing bladder and the pull-out bladder are made of rubber material and are connected to an external inflation device through the pipe.

[0012] A proposed method for using a helical-push recanalization catheter for chronic vascular occlusion includes the following steps: Step 1: First, use medical equipment to examine the patient's blood vessels. After the examination, insert the drilling device into the blood vessel and extend it along the blood vessel to the occlusion. Then, start the motor by controlling the button to rotate the drill bit. Simultaneously, manually slide the first slider to move the casing and the extension tube, which in turn moves the drill bit to drill a hole in the blockage. At the same time, the external inflation device inflates the sealing bladder through the channel inside the outer casing and contacts the blood vessel wall to block the blood vessel. Step 2: After the drill bit reaches the other side of the blockage, the motor stops. Then, air is injected into the stretching tube to inflate the pull-out bladder. When the pull-out bladder inflates, it causes the opening bracket and elastic connector to open. Then, manually pull the push-pull device to pull the blockage back. Then, simultaneously start the suction machine connected to the outer sleeve to suck out the pulled-back blockage. Repeat this several times to complete the blockage removal. Step 3: When a stent needs to be placed in the blood vessel after cleaning, pull the lever outward and lift it upward to release the restriction on the second slider, thereby removing the second slider. Then move the second slider to drive the casing to release the vascular stent. The vascular stent opens itself to support the blood vessel. The vascular stent is set with two sections. When the blood vessel wall that needs to be supported is long, both sections of the vascular stent can be removed. After the release is completed, move the second slider back to its original position. Step 4: Next, move the pull rod back to its original position via the spring and limit it. Then, extract the gas from the pull-out balloon, restore it to its original state, pass it through the middle of the opened vascular stent, and move it into the outer cannula. Then, restore the closure balloon to its original state, and then manually pull the outer cannula to remove it, completing the operation.

[0013] (III) Beneficial Effects This invention provides a spiral-deployed recanalization catheter for chronic vascular occlusion and its operation method. It has the following beneficial effects: 1. By designing the vascular stent as a segmented structure, the support area is increased, and the appropriate length can be selected according to actual needs, making it convenient to use.

[0014] 2. The expansion bracket and elastic connector expand the area when the bladder is expanded, increasing the amount of blockage pulled back, thereby quickly absorbing the blockage and improving the clearance efficiency.

[0015] 3. The integrated design of the vascular stent and drilling device provides doctors with more options based on the actual situation, making it easier to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 2 This is a partial structural schematic diagram of a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 3 This is a schematic diagram of the internal structure of a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 4This is a schematic diagram of the internal structure of the casing of a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 5 This is a schematic diagram of the internal structure of the stretching tube in a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 6 This is a schematic diagram of the drilling device structure for a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 7 This is a schematic diagram of the internal structure of the drilling device for a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 8 This is a partial structural schematic diagram of a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 9 This is a schematic diagram of the first structure of the push-pull device for a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention. Figure 10 This is a schematic diagram of the second structure of the push-pull device for a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method proposed in this invention.

[0017] The components include: 1. Handle; 2. Outer sleeve; 3. Drilling device; 301. Drill head; 302. Opening support; 303. Pulling bag; 304. Motor; 305. Fixing plate; 306. Elastic connector; 4. Push-pull device; 401. First slider; 402. Fixing block; 403. Second slider; 404. Pulling rod; 405. Sliding block; 406. Sliding rod; 407. Spring; 408. Rotating rod; 5. Closing bag; 6. Control button; 7. Shell; 8. Vascular stent; 9. Tension tube. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: like Figure 1-10As shown, this embodiment of the invention provides a spiral-propelled recanalization catheter for chronic vascular occlusion and its operation method, including a handle 1; an outer cannula 2 is fixedly connected to the front end of the handle 1; an aspiration machine is connected to the inner side of the outer cannula 2; a drilling device 3 is provided at the end of the outer cannula 2; a push-pull device 4 is slidably connected to the inner surface of the handle 1; a sealing balloon 5 is fixedly connected to the outer wall of the outer cannula 2 at the end; a shell 7 is movably connected to the inner surface of the outer cannula 2; a tension tube 9 is slidably connected to the inner surface of the shell 7; a vascular stent 8 is installed on the outer wall of the tension tube 9 and the inner wall of the shell 7, the vascular stent 8 being configured in two sections; and a control button 6 is installed on the inner wall surface of the handle 1.

[0020] The outer cannula 2 is connected to a suction machine inside the handle 1 to remove blockages in the blood vessels.

[0021] The drilling device 3 includes a drill bit 301, an opening bracket 302, a pull-out bag 303, a motor 304, a fixed plate 305, and an elastic connector 306; the pull-out bag 303 is fixedly connected to the outer wall surface at the end of the tension tube 9; the interior of the pull-out bag 303 communicates with the interior space of the tension tube 9; the motor 304 is fixedly connected to the inner surface at the end of the tension tube 9; and the drill bit 301 is fixedly connected to the output end of the motor 304.

[0022] The fixed plate 305 is fixedly connected to the end of the tension tube 9. The opening bracket 302 is movably connected to the inner wall surface of the fixed plate 305 through short pins on both sides of one end. The middle part of the opening bracket 302 is fixedly connected to the outer wall of the pull-out bag 303. The elastic connector 306 is fixedly connected between the opening brackets 302.

[0023] The elastic connector 306 is made of elastic material. When the stent 302 opens, it is used to expand the area and scrape off more vascular blockages. When the pull-out bladder 303 expands, it opens the stent 302 and the elastic connector 306 for subsequent scraping. The inflation device connected to the tension tube 9 inflates the pull-out bladder 303 through the channel in the tension tube 9 to scrape off vascular blockages. The sealing bladder 5 is also connected to an inflation device to block the vascular wall and prevent blood flow from causing debris to flow away. The control button 6 is electrically connected to the drill bit 301 and is used to control the rotation of the drill bit 301.

[0024] The push-pull device 4 includes a first slider 401, a fixing block 402, a second slider 403, a pulling rod 404, a sliding block 405, a sliding rod 406, a spring 407, and a rotating rod 408; the first slider 401 is slidably connected to the inner surface of the handle 1; the second slider 403 is limited to the inner surface of the first slider 401 by the pulling rod 404; the fixing block 402 is fixedly connected to the lower surface of the first slider 401; the lower end of the fixing block 402 penetrates the outer wall surface of the housing 7 and is fixedly connected to the outer wall surface of the tension tube 9.

[0025] One end of the housing 7 is fixedly connected to the side surface of the second slider 403; the sliding block 405 is slidably connected to the inner side wall surface of the first slider 401; the sliding rod 406 is fixedly connected to the side surface of the sliding block 405; and the spring 407 is sleeved on the side surface of the sliding rod 406.

[0026] One end of the spring 407 is fixedly connected to the side surface of the sliding block 405; the other end of the spring 407 is fixedly connected to the inner surface of the first slider 401; the rotating rod 408 is rotatably connected to the inner surface of the sliding block 405; and the pulling rod 404 is fixedly connected to both ends of the rotating rod 408.

[0027] The outer sleeve 2 is provided with a pipe that communicates with the interior of the sealing bladder 5; the sealing bladder 5 and the pull-out bladder 303 are made of rubber and are connected to an external inflation device through the pipe.

[0028] A proposed method for using a helical-push recanalization catheter for chronic vascular occlusion includes the following steps: Step 1: First, use medical equipment to examine the patient's blood vessels. After the examination, insert the drilling device 3 into the blood vessel and extend it along the blood vessel to the place where the blood vessel is blocked. Then, start the motor 304 through the control button 6 to drive the drill head 301 to rotate. Simultaneously, manually slide the first slider 401 to drive the shell 7 and the stretching tube 9 to move, which in turn drives the drill head 301 to move, thereby drilling a hole in the blockage. At the same time, the external inflation device inflates the sealing bladder 5 through the channel inside the outer sleeve 2 and contacts the blood vessel wall to block the blood vessel. Step 2: After the drill bit 301 drills to the other side of the blockage, the motor 304 stops. Then, air is injected into the tension tube 9 to make the pull-out bladder 303 inflate. When the pull-out bladder 303 inflates, it causes the opening bracket 302 and the elastic connector 306 to open. Then, the push-pull device 4 is manually pulled to pull the blockage back. Then, the suction machine connected to the outer sleeve 2 is started simultaneously to suck out the pulled-back blockage. Then, it is repeated several times to complete the cleaning of the blockage. Step 3: When a stent needs to be placed in the blood vessel after cleaning, pull the lever 404 outward and lift it upward to release the restriction on the second slider 403, thereby removing the second slider 403. Then, move the second slider 403 to drive the housing 7 to release the vascular stent 8. The vascular stent 8 opens to support the blood vessel. The vascular stent 8 is provided with two sections. When the blood vessel wall that needs to be supported is long, both sections of the vascular stent 8 can be removed. After the release is completed, move the second slider 403 back to its original position. Step 4: Next, move the pull rod 404 back to its original position via the spring 407 and limit it. Then, extract the gas from the pull-out balloon 303 and restore it to its original state. Pass it through the middle of the opened vascular stent 8 and move it into the outer cannula 2. Then, restore the sealing balloon 5 to its original state and manually pull the outer cannula 2 to remove it, thus completing the operation.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral-push recanalization catheter for chronic vascular occlusion and its operation method, comprising a handle (1); characterized in that: The front end of the handle (1) is fixedly connected to an outer sleeve (2); an aspiration machine is connected to the inner side of the outer sleeve (2); a drilling device (3) is provided at the end of the outer sleeve (2); a push-pull device (4) is slidably connected to the inner surface of the handle (1); a sealing sac (5) is fixedly connected to the outer wall of the outer sleeve (2) at the end; a shell (7) is movably connected to the inner surface of the outer sleeve (2); a tension tube (9) is slidably connected to the inner surface of the shell (7); a vascular stent (8) is installed on the outer wall of the tension tube (9) and the inner wall of the shell (7), and the vascular stent (8) is set in two sections; the control button (6) is installed on the inner wall surface of the handle (1).

2. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: The drilling device (3) includes a drill bit (301), an opening bracket (302), a pull-out bag (303), a motor (304), a fixed plate (305), and an elastic connector (306); the pull-out bag (303) is fixedly connected to the outer wall surface at the end of the tension tube (9); the interior of the pull-out bag (303) is in communication with the interior space of the tension tube (9); the motor (304) is fixedly connected to the inner surface at the end of the tension tube (9); the drill bit (301) is fixedly connected to the output end of the motor (304).

3. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: The fixed plate (305) is fixedly connected to the end of the stretching tube (9), and the opening bracket (302) is movably connected to the inner wall surface of the fixed plate (305) by short pins on both sides of one end; the middle position of the opening bracket (302) is fixedly connected to the outer wall of the pull-out bag (303), and the elastic connector (306) is fixedly connected between the opening brackets (302).

4. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: The push-pull device (4) includes a first slider (401), a fixed block (402), a second slider (403), a pull rod (404), a sliding block (405), a sliding rod (406), a spring (407), and a rotating rod (408); the first slider (401) is slidably connected to the inner surface of the handle (1); the second slider (403) is limited to the inner surface of the first slider (401) by the pull rod (404); the fixed block (402) is fixedly connected to the lower surface of the first slider (401); the lower end of the fixed block (402) penetrates the outer wall surface of the sleeve (7) and is fixedly connected to the outer wall surface of the tension tube (9).

5. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: One end of the housing (7) is fixedly connected to the side surface of the second slider (403); the sliding block (405) is slidably connected to the inner wall surface of the first slider (401); the sliding rod (406) is fixedly connected to the side surface of the sliding block (405); and the spring (407) is sleeved on the side surface of the sliding rod (406).

6. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: One end of the spring (407) is fixedly connected to the side surface of the sliding block (405); the other end of the spring (407) is fixedly connected to the inner surface of the first slider (401); the rotating rod (408) is rotatably connected to the inner surface of the sliding block (405); and the pulling rod (404) is fixedly connected to both ends of the rotating rod (408).

7. The spiral-push recanalization catheter for chronic vascular occlusion and its operation method according to claim 1, characterized in that: The outer sleeve (2) is provided with a pipe that communicates with the interior of the sealing bladder (5); the sealing bladder (5) and the pull-out bladder (303) are made of rubber material and are connected to an external inflation device through the pipe.

8. The method of operation for a spiral-push recanalization catheter for chronic vascular occlusion according to any one of claims 1-7, characterized in that: Includes the following steps: Step 1: First, use medical equipment to examine the patient's blood vessels. After the examination, insert the drilling device (3) into the blood vessel and extend it along the blood vessel to the place where the blood vessel is blocked. Then, start the motor (304) by controlling the button (6) to drive the drill head (301) to rotate. Simultaneously, manually slide the first slider (401) to drive the casing (7) and the stretching tube (9) to move, thereby driving the drill head (301) to move, so as to drill a hole in the blockage. At the same time, the external inflation device inflates the sealing bladder (5) through the channel inside the outer casing (2) and contacts the blood vessel wall to block the blood vessel. Step 2: After the drill bit (301) drills to the other side of the blockage, the motor (304) stops. Then, air is injected into the stretching tube (9) to make the pull-out bladder (303) bulge. When the pull-out bladder (303) bulges, it causes the opening bracket (302) and the elastic connector (306) to open. Then, the push-pull device (4) is manually pulled to pull the blockage back. Then, the suction machine connected to the outer sleeve (2) is started simultaneously to suck out the pulled-back blockage. Then, the process is repeated several times to complete the cleaning of the blockage. Step 3: When a stent needs to be placed in the blood vessel after cleaning, pull the lever (404) outward and lift it upward to release the limit on the second slider (403), thereby removing the second slider (403). Then move the second slider (403) to drive the casing (7) to release the vascular stent (8). The vascular stent (8) opens itself to support the blood vessel. The vascular stent (8) is provided with two sections. When the blood vessel wall that needs to be supported is long, both sections of the vascular stent (8) can be removed. After the release is completed, move the second slider (403) back to its original position. Step 4: Next, move the pull rod (404) back to its original position and limit it through the spring (407). Then, extract the gas from the pull-out balloon (303) and restore it to its original state. Pass it through the middle of the opened vascular stent (8) and move it into the outer cannula (2). Then, restore the closing balloon (5) to its original state and manually pull the outer cannula (2) to remove it, thus completing the operation.

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