Scissor suite in blood vessel cavity and training method

Abstract

The invention discloses a vascular intracavity scissor suite and a training method, and relates to interventional operation medical instruments. The scissors suite in the blood vessel cavity comprises a scissors device. The scissor device comprises a base, a sliding sleeve, a sheathing canal, a first steel wire and a scissor assembly; the sliding sleeve is arranged on the sliding sleeve sliding section of the base in a sliding and sleeving mode. The rear end of the sheathing canal is fixedly connected to the sheathing canal connecting section of the base, and a first channel is formed in the sheathing canal. The first steel wire is slidably mounted in the first channel, the rear end of the first steel wire extends out of the sheathing canal and is fixedly connected with the sliding sleeve, and the front end of the first steel wire extends out of the sheathing canal and is connected with the scissor assembly; the first steel wire is driven by the sliding sleeve to move along the first channel of the sheathing canal, and then the scissor assembly is driven to be opened and closed. The invention relates to an embolism spring ring flexible filament shearing removal training method based on a vascular intraluminal scissor kit. The device can cut and remove the end filament of the embolism spring ring extending into a normal blood vessel cavity under a minimally invasive / interventional operation, and is suitable for treatment during or after an operation of implanting the embolism spring ring.

Description

Technical Field

[0001] The invention relates to an interventional surgery medical device, in particular to an intravascular scissors kit and a training method. Background Art

[0002] The embolic coil is an embolic device made of materials such as metal alloys or artificial fibers. It is mainly used to fill the aneurysm cavity. It is contracted and loaded into a microcatheter, implanted into the blood vessel through interventional surgery, and gradually expands and fills the aneurysm cavity, promoting thrombus formation, thereby blocking blood flow in the aneurysm and reducing the risk of aneurysm rupture.

[0003] However, during or shortly after the implantation of the embolic coil, the embolic coil may shift, causing the flexible filaments of the embolic coil to extend into the normal blood vessel lumen. The extended flexible filaments may induce thrombosis and affect blood flow in the blood vessel.

[0004] The most direct solution to the above problem is to cut the flexible filaments in the normal blood vessel cavity and drag them out of the body, but there is currently no corresponding surgical instrument to achieve the above functional demands. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an intravascular scissors kit and a training method, which can cut and remove the end filaments of the embolic spring coil extending into the normal blood vessel cavity under minimally invasive / interventional surgery, and is suitable for handling the above situation during or after the implantation of the embolic spring coil.

[0006] The technical solution of the present invention is: an intravascular scissors kit, comprising a scissors device; The scissors device comprises a base, a sleeve, a sheath, a first steel wire and a scissors assembly; the base is a strip-shaped component, a sleeve sliding section is provided at its rear end, and a sheath connecting section is provided at its front end; the sleeve sliding sleeve is mounted on the sleeve sliding section of the base, and it only makes linear reciprocating movements on the sleeve sliding section of the base; the rear end of the sheath is fixedly connected to the sheath connecting section of the base, the front end of the sheath is a free end, and a first channel is provided inside the sheath that runs through its front and rear ends; the first steel wire is slidably installed in the first channel of the sheath, the rear end of the steel wire extends out of the sheath and is fixedly connected to the sleeve, and the front end of the steel wire extends out of the sheath and is connected to the scissors assembly; the first steel wire moves along the first channel of the sheath driven by the sleeve, thereby driving the scissors assembly to open and close.

[0007] A further technical solution of the present invention is: a second channel is provided inside the sheath tube, penetrating the front end surface and the rear end side wall thereof; An intravascular scissors kit, further comprising a capture device; The capture device consists of a second steel wire and a loop fixedly connected to the front end of the second steel wire; the second steel wire is movably installed in the second channel of the sheath, and its rear end extends out of the sheath; when the loop is in the second channel of the sheath, it is constrained by the second channel of the sheath and deformed, and when the loop extends out of the sheath, it recovers under the action of its own elasticity.

[0008] A further technical solution of the present invention is: a side tube is installed at the entrance of the second channel on the rear end side wall of the sheath tube, the front end of the side tube is connected to the entrance of the second channel on the rear end side wall of the sheath tube, the rear end of the side tube is a free end and is provided with a bell mouth, and the inner hole of the side tube is connected to the second channel of the sheath tube; the front end of the capture device enters the second channel of the sheath tube through the bell mouth of the side tube and the inner hole of the side tube in turn.

[0009] A further technical solution of the present invention is: the base is provided with two parallel guide columns in the sliding section of the sleeve, and a hollow area is provided between the two guide columns; correspondingly, the sleeve is provided with guide holes that pass through its two end surfaces and cooperate with the guide columns, and the sleeve is slidably installed on the two guide columns through the two guide holes; the rear end head of the sheath tube extends into the hollow area; the rear end of the first steel wire is in the hollow area and is fixedly connected to the end surface of the sleeve.

[0010] A further technical solution of the present invention is: the scissors assembly includes an axle seat, a rhombus deformation frame and a shearing arm; the two axle seats are arranged opposite to each other and fixedly connected to the front end surface of the sheath tube, and an installation area is provided between the two axle seats; the rhombus deformation frame is provided with a hinge point A and a hinge point B arranged opposite to each other, and the rhombus deformation frame as a whole is located in the installation area between the two axle seats, the hinge point A of the rhombus deformation frame is hinged to the front end head of the first steel wire extending into the installation area, and the hinge point B of the rhombus deformation frame is hinged to one end of the two axle seats relatively away from the sheath tube; the two shearing arms are arranged crosswise and respectively connected at the hinge point B of the rhombus deformation frame, the two shearing arms are respectively provided with a blade on one side, the blades of the two shearing arms are arranged opposite to each other, and the two shearing arms open or close with the deformation of the rhombus deformation frame.

[0011] A further technical solution of the present invention is that the two ends of the blade are straight lines, and the middle part is a concave arc; when the two shear arms are closed, the two concave arcs are opposite and closed.

[0012] Compared with the prior art, the present invention has the following advantages: it can shear and remove the end filaments of the embolic coil extending into the normal blood vessel cavity under minimally invasive / interventional surgery, and is suitable for handling the above situation during or after the implantation of the embolic coil.

[0013] The technical scheme of the present invention is: a training method for cutting and removing flexible filaments of an embolization coil, based on the above-mentioned intravascular scissors kit; the object of the training method is a simulated human model; the simulated human model is made of repairable material, and is provided with simulated skin on the outside, and is provided with a thoracic cavity and an abdominal cavity on the inside, and the thoracic cavity and the abdominal cavity are respectively provided with corresponding organs and simulated blood vessels, and the simulated blood vessels are filled with colored liquid and have the characteristics of DSA development, and the simulated blood vessels include a thoracic aorta and an abdominal aorta, and a simulated aortic aneurysm is provided on the thoracic aorta or the abdominal aorta, and the aortic aneurysm is filled with an embolization coil and a solidified colloid, and the solidified colloid is used to simulate a coagulated thrombus, and the embolization coil is embedded in the solidified colloid, leaving only one end filament exposed to the outside and extending into the thoracic aorta or the abdominal aorta; The training method operates as follows: S01. Puncture the femoral artery, insert the guidewire, and push the guidewire deep into the blood vessel until the front end of the guidewire reaches the aortic aneurysm and the rear end of the guidewire extends outside the human model; pass the outlet of the second channel of the sheath through the rear end of the guidewire, and push the sheath deep into the blood vessel along the path defined by the guidewire until the front end of the sheath reaches 1-4 cm distal to the aortic aneurysm, and the rear end and base of the sheath both extend outside the human model; S02. The guide wire is pulled out from the second channel of the sheath, and the ferrule of the capture device is inserted into the flared mouth of the side tube and pushed forward. The ferrule of the capture device passes through the inner hole of the side tube, the inlet of the second channel, the second channel and the outlet of the second channel in sequence, and extends to the outside of the front end of the sheath, and the rear end of the capture device extends outside the human body model; S03. Continue to push the capture device, adjust the posture and position of the loop by rotating the second steel wire and / or the base, so that the loop covers the end filament of the embolic spring coil; S04. Perform three operations simultaneously: Ⅰ. Push the sheath tube again to move the scissor assembly toward the direction of the end filament; Ⅱ. Move the sliding sleeve to slide on the sliding section of the sliding sleeve of the base, thereby pushing the first steel wire toward the direction of the scissor assembly, and the diamond deformation frame is deformed by the first steel wire, thereby driving the two shear arms from closed to open; Ⅲ. Under the premise of ensuring that the end filament does not fall out of the ring, rotate the base to adjust the scissor assembly to a suitable cutting angle. At different cutting angles, the length of the remaining end filament is different. Specifically, the length of the remaining end filament after the cutting operation is within 2 mm. S05. The sliding sleeve is moved on the sliding sleeve sliding section of the base, and the diamond-shaped deformation frame is deformed by the first steel wire, thereby driving the two shear arms from opening to closing, thereby cutting the end filaments located between the two concave arcs of the two shear arms; S06. The capture device is pulled out to the outside of the human body model, and the ferrule of the capture device carries the cut end filament, enters the second channel through the outlet of the second channel, and then passes through the inlet of the second channel, the inner hole of the side tube and the flare of the side tube in sequence, and is discharged to the outside of the human body model; S07. Withdraw the sheath and close the wound.

[0014] The present invention is further described below in conjunction with the figures and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the scissors assembly of the present invention when it is opened; Figure 2 It is a schematic diagram of the structure of the closed type of the scissors assembly of the present invention; Figure 3 for Figure 1 A magnified view of part I; Figure 4 for Figure 2 The enlarged view of part II; Figure 5 for Figure 3 AA section view; Figure 6 for Figure 1 BB cross-sectional view; Figure 7 for Figure 4 CC section view; Figure 8 This is the state diagram when step 1 of the training method is completed; Fig. 9 This is the state diagram when step 2 of the training method is completed; Fig.10 This is the state diagram when step 3 of the training method is completed; Fig.11 This is the state diagram when step 4 of the training method is completed; Fig.12 This is the state diagram when step 5 of the training method is completed; Fig.13 This is the state diagram during step 6 of the training method.

[0016] Legend: base 11; sleeve sliding section 111; sheath connecting section 112; guide column 113; hollow area 114; sleeve 12; sheath 13; first channel 131; second channel 132; side tube 133; bell mouth 1331; first steel wire 14; scissors assembly 15; shaft seat 151; diamond deformation frame 152; hinge point A1521; hinge point B1522; shear arm 153; concave arc 1531; capture device 2; second steel wire 21; loop 22; guide wire 3; aortic aneurysm 4; end filament 5. DETAILED DESCRIPTION Example 1

[0017] like Figure 1-7 As shown, the intravascular scissors kit includes a scissors device and a capture device 2.

[0018] The scissors device includes a base 11, a sleeve 12, a sheath 13, a first steel wire 14 and a scissors assembly 15. The base 11 is a strip-shaped member, and a sleeve sliding section 111 is provided at its rear end, and a sheath connecting section 112 is provided at its front end. The sleeve 12 is slidably mounted on the sleeve sliding section 111 of the base 11, and it only makes linear reciprocating movements on the sleeve sliding section 111 of the base 11. The rear end of the sheath 13 is fixedly connected to the sheath connecting section 112 of the base 11, and the front end of the sheath 13 is a free end. A first channel 131 is provided inside the sheath 13, which passes through its front and rear ends. A second channel 132 is also provided inside the sheath 13, which passes through its front end face and rear end side wall, and the second channel 132 is provided with an outlet and an inlet on the front end face and rear end side wall of the sheath 13, respectively. The first steel wire 14 is slidably installed in the first channel 131 of the sheath tube 13, with its rear end extending outside the sheath tube 13 and fixedly connected to the sliding sleeve 12, and its front end extending outside the sheath tube 13 and connected to the scissors assembly. The first steel wire 14 moves along the first channel 131 (inside) of the sheath tube 13 under the drive of the sliding sleeve 12, thereby driving the scissors assembly to open and close.

[0019] The capture device 2 is composed of a second steel wire 21 and a ferrule 22 fixedly connected to the front end of the second steel wire 21. Both the second steel wire 21 and the ferrule 22 are made of flexible elastic materials. The second steel wire 21 is movably installed in the second channel 132 of the sheath tube 13, and its rear end extends outside the sheath tube 13. When the ferrule 22 is in the second channel 132 of the sheath tube 13, it is constrained by the second channel 132 of the sheath tube 13 and becomes a strip. When the ferrule 22 extends outside the sheath tube 13, it expands and recovers to an elliptical shape under the action of its own elasticity.

[0020] Preferably, the sheath tube 13 is made entirely of flexible and bendable material.

[0021] Preferably, the sheath tube 13 is provided with a side tube 133 at the entrance of the second channel 132 of the rear end side wall, the front end of the side tube 133 is connected to the entrance of the second channel 132 of the rear end side wall of the sheath tube, the rear end of the side tube 133 is a free end and is provided with a bell mouth 1331, and the inner hole of the side tube 133 is connected with the second channel 132 of the sheath tube 13. The front end (the collar 22) of the capture device 2 sequentially enters the second channel 132 of the sheath tube 13 through the bell mouth 1331 of the side tube 133 and the inner hole of the side tube 133. The design of the side tube 133 and the bell mouth 1331 is to facilitate the installation of the capture device 2 into the second channel 132 of the sheath tube 13.

[0022] Preferably, the base 11 is provided with two parallel guide posts 113 in the sliding section 111 of the sleeve, and a hollow area 114 is provided between the two guide posts 113. Correspondingly, the sleeve 12 is provided with guide holes that pass through its two end faces and cooperate with the guide posts 113, and the sleeve 12 is slidably mounted on the two guide posts 113 through the two guide holes. The rear end head of the sheath 13 extends into the hollow area 114. The rear end of the first steel wire 14 is in the hollow area 114 and is fixedly connected to the end face of the sleeve 12. The sliding matching structure of the sleeve 12 and the base 11 is specifically defined here. Based on this structure, the sleeve 12 can only make reciprocating linear movements in the fixed section on the base 11, and cannot rotate relative to the base 11, meeting the corresponding functional requirements.

[0023] Preferably, the scissor assembly 15 comprises an axle seat 151, a rhombus-shaped deformation frame 152 and a shear arm 153. The two axle seats 151 are arranged opposite to each other and fixedly connected to the front end surface of the sheath tube 13, and a mounting area is provided between the two axle seats 151. The rhombus deformation frame 152 is provided with a hinge point A1521 and a hinge point B1522 which are arranged opposite to each other. The rhombus deformation frame 152 is located as a whole in the installation area between the two axle seats 151. The hinge point A1521 of the rhombus deformation frame 152 is hinged to the front end of the first steel wire 14 extending into the installation area, and the hinge point B1522 of the rhombus deformation frame 152 is hinged to one end of the two axle seats 151 which is relatively far away from the sheath 13; the two shear arms 153 are arranged crosswise and respectively connected to the hinge point B1522 of the rhombus deformation frame 152, and the two shear arms 153 are respectively provided with blades on one side, and the blades of the two shear arms 153 are arranged opposite to each other. The two shear arms 153 open or close as the rhombus deformation frame 153 deforms. The associated structure of the scissors assembly 15 and the first steel wire 14 is specifically defined here. Based on this structure, when the first steel wire 14 telescopes and moves in the first channel 131 of the base 11, the front end of the first steel wire 14 drives the diamond-shaped deformation frame 152 to deform, thereby driving the two shear arms 153 to open or close.

[0024] Preferably, the two ends of the blade are straight lines, and the middle part is a concave arc 1531. When the two shear arms 153 are closed, the concave arcs 1531 on the two shear arms 153 are facing and closed. Based on this structure, the positioning and anti-slip of the sheared object are achieved, and the sheared object is effectively prevented from sliding out of the shearing area (i.e., the V-shaped area formed when the two shear arms 153 are opened) when the two shear arms 153 are closed.

[0025] A training method for cutting and removing flexible filaments of embolization coils is based on the above-mentioned intravascular scissors kit. The object of the training method is a simulated human model. The simulated human model is made of repairable materials, with simulated skin on the outside, and a thoracic cavity and an abdominal cavity on the inside. The thoracic cavity and the abdominal cavity are respectively provided with corresponding organs and simulated blood vessels. The simulated blood vessels are filled with colored liquids and have the characteristics of DSA development. The simulated blood vessels include the thoracic aorta and the abdominal aorta. The thoracic aorta or the abdominal aorta is provided with a simulated aortic aneurysm. The aortic aneurysm is filled with embolization coils and solidified colloid. The solidified colloid is used to simulate a coagulated thrombus. The embolization coil is embedded in the solidified colloid, leaving only one end filament exposed to the outside and extending into the thoracic aorta or the abdominal aorta.

[0026] like Figure 8-13 As shown, the training method operates as follows: 1. Puncture the femoral artery, insert the guide wire 3, and push the guide wire 3 deep into the blood vessel until the front end of the guide wire 3 reaches the aortic aneurysm 4, and the rear end of the guide wire 3 extends outside the human body model; pass the outlet of the second channel 132 of the sheath tube 13 (located on the front end surface of the sheath tube 13) through the rear end of the guide wire 3, and push the sheath tube 13 deep into the blood vessel along the path defined by the guide wire 3 until the front end of the sheath tube 13 reaches 1-4 cm from the distal end of the aortic aneurysm 4, and the rear end of the sheath tube 13 and the base 11 both extend outside the human body model.

[0027] 2. Pull out the guide wire 3 from the second channel 132 of the sheath tube 13, and then insert the loop 22 of the capture device 2 into the bell mouth 1331 of the side tube 133, and push it forward. The loop 22 of the capture device 2 passes through the inner hole of the side tube 133, the entrance of the second channel 132 (located on the rear end side wall of the sheath tube 13), the second channel 132 and the exit of the second channel 132 in sequence, and extends to the outside of the front end of the sheath tube 13, and the rear end of the capture device 2 extends outside the human body model.

[0028] 3. Continue to push the capture device 2, and adjust the posture and position of the ring 22 by rotating the second steel wire 21 and / or the base 11, so that the ring 22 covers the end filament 5 of the embolic spring coil.

[0029] 4. Perform three operations simultaneously: Ⅰ. Push the sheath 13 again to move the scissors assembly 15 toward the direction close to the terminal filament 5; Ⅱ. Move the sleeve 12 to slide on the sleeve sliding section 111 of the base 11, thereby pushing the first steel wire 14 toward the direction close to the scissors assembly 15, and the diamond-shaped deformation frame 152 is deformed by the first steel wire 14, thereby driving the two shear arms 153 from closed to open; Ⅲ. On the premise of ensuring that the terminal filament 5 does not escape from the ring 22, rotate the base 11 to adjust the scissors assembly to a suitable shearing angle. At different shearing angles, the length of the remaining terminal filament 5 is different. Specifically, the length of the remaining terminal filament 5 after the cutting operation is within 2 mm.

[0030] 5. Move the sliding sleeve 12 on the sliding sleeve sliding section 111 of the base 11, drive the diamond-shaped deformation frame 152 to deform through the first steel wire 14, and then drive the two shear arms 153 from opening to closing, so as to cut the end filament 5 between the two concave arcs 1531 of the two shear arms 153.

[0031] 6. Pull out the capture device 2 to the outside of the human body model. The ring 22 of the capture device 2 carries the cut end filament 5, enters the second channel 132 through the outlet of the second channel 132, and then passes through the inlet of the second channel 132, the inner hole of the side tube 133 and the bell mouth 1331 of the side tube 133 in sequence, and is discharged to the outside of the human body model.

[0032] 7. Withdraw the sheath 13 and close the wound.

Claims

1. An intravascular scissors kit, characterized by: Includes scissor device; The scissors device comprises a base, a sleeve, a sheath, a first steel wire and a scissors assembly; the base is a strip-shaped component, a sleeve sliding section is provided at its rear end, and a sheath connecting section is provided at its front end; the sleeve sliding sleeve is mounted on the sleeve sliding section of the base, and it only makes linear reciprocating movements on the sleeve sliding section of the base; the rear end of the sheath is fixedly connected to the sheath connecting section of the base, the front end of the sheath is a free end, and a first channel is provided inside the sheath that runs through its front and rear ends; the first steel wire is slidably installed in the first channel of the sheath, the rear end of the steel wire extends out of the sheath and is fixedly connected to the sleeve, and the front end of the steel wire extends out of the sheath and is connected to the scissors assembly; the first steel wire moves along the first channel of the sheath driven by the sleeve, thereby driving the scissors assembly to open and close.

2. The intravascular scissors kit according to claim 1, characterized in that: A second passage is provided inside the sheath tube, penetrating the front end surface and the rear end side wall thereof; An intravascular scissors kit, further comprising a capture device; The capture device consists of a second steel wire and a loop fixedly connected to the front end of the second steel wire; the second steel wire is movably installed in the second channel of the sheath, and its rear end extends out of the sheath; when the loop is in the second channel of the sheath, it is constrained by the second channel of the sheath and deformed, and when the loop extends out of the sheath, it recovers under the action of its own elasticity.

3. The intravascular scissors kit according to claim 2, characterized in that: A side tube is installed at the entrance of the second channel on the rear end side wall of the sheath tube, the front end of the side tube is connected to the entrance of the second channel on the rear end side wall of the sheath tube, the rear end of the side tube is a free end and is provided with a bell mouth, and the inner hole of the side tube is connected to the second channel of the sheath tube; the front end of the capture device enters the second channel of the sheath tube through the bell mouth of the side tube and the inner hole of the side tube in turn.

4. The intravascular scissors kit according to claim 3, characterized in that: The base is provided with two parallel guide columns in the sliding section of the sleeve, and a hollow area is provided between the two guide columns; correspondingly, the sleeve is provided with guide holes that pass through its two end surfaces and cooperate with the guide columns, and the sleeve is slidably installed on the two guide columns through the two guide holes; the rear end head of the sheath tube extends into the hollow area; the rear end of the first steel wire is in the hollow area and is fixedly connected to the end surface of the sleeve.

5. The intravascular scissors kit according to claim 4, characterized in that: The scissors assembly includes an axle seat, a rhombus-shaped deformation frame and a shearing arm; the two axle seats are arranged opposite to each other and fixedly connected to the front end surface of the sheath tube, and an installation area is provided between the two axle seats; the rhombus-shaped deformation frame is provided with a hinge point A and a hinge point B which are arranged opposite to each other, and the rhombus-shaped deformation frame is located in the installation area between the two axle seats as a whole, the hinge point A of the rhombus-shaped deformation frame is hinged to the front end head of the first steel wire extending into the installation area, and the hinge point B of the rhombus-shaped deformation frame is hinged to one end of the two axle seats which is relatively far away from the sheath tube; the two shearing arms are arranged crosswise and are respectively connected at the hinge point B of the rhombus-shaped deformation frame, the two shearing arms are respectively provided with a blade on one side, the blades of the two shearing arms are arranged opposite to each other, and the two shearing arms are opened or closed as the rhombus-shaped deformation frame is deformed.

6. The intravascular scissors kit according to claim 5, characterized in that: The two ends of the blade are straight lines, and the middle is a concave arc; when the two shear arms are closed, the two concave arcs are opposite and closed.

7. A training method for cutting and removing flexible filaments of embolic coils, based on the intravascular scissors kit according to claim 6; characterized in that: The object of the training method is a simulated human model; the simulated human model is made of repairable materials, with simulated skin on the outside, and thoracic cavity and abdominal cavity on the inside, with corresponding organs and simulated blood vessels respectively arranged in the thoracic cavity and abdominal cavity, the simulated blood vessels are filled with colored liquid and have the characteristics of DSA development, the simulated blood vessels include thoracic aorta and abdominal aorta, the thoracic aorta or abdominal aorta is provided with a simulated aortic aneurysm, the aortic aneurysm is filled with embolization coils and solidified colloid, the solidified colloid is used to simulate coagulated thrombus, the embolization coils are embedded in the solidified colloid, and only one end filament is left exposed and extends into the thoracic aorta or abdominal aorta; The training method operates as follows: S01. Puncture the femoral artery, insert the guidewire, and push the guidewire deep into the blood vessel until the front end of the guidewire reaches the aortic aneurysm and the rear end of the guidewire extends outside the human model; pass the outlet of the second channel of the sheath through the rear end of the guidewire, and push the sheath deep into the blood vessel along the path defined by the guidewire until the front end of the sheath reaches 1-4 cm distal to the aortic aneurysm, and the rear end and base of the sheath both extend outside the human model; S02. The guide wire is pulled out from the second channel of the sheath, and the ferrule of the capture device is inserted into the flared mouth of the side tube and pushed forward. The ferrule of the capture device passes through the inner hole of the side tube, the inlet of the second channel, the second channel and the outlet of the second channel in sequence, and extends to the outside of the front end of the sheath, and the rear end of the capture device extends outside the human body model; S03. Continue to push the capture device, adjust the posture and position of the loop by rotating the second steel wire and / or the base, so that the loop covers the end filament of the embolic spring coil; S04. Perform three operations simultaneously: Ⅰ. Push the sheath tube again to move the scissor assembly toward the direction of the end filament; Ⅱ. Move the sliding sleeve to slide on the sliding section of the sliding sleeve of the base, thereby pushing the first steel wire toward the direction of the scissor assembly, and the diamond deformation frame is deformed by the first steel wire, thereby driving the two shear arms from closed to open; Ⅲ. Under the premise of ensuring that the end filament does not fall out of the ring, rotate the base to adjust the scissor assembly to a suitable cutting angle. At different cutting angles, the length of the remaining end filament is different. Specifically, the length of the remaining end filament after the cutting operation is within 2 mm. S05. The sliding sleeve is moved on the sliding sleeve sliding section of the base, and the diamond-shaped deformation frame is deformed by the first steel wire, thereby driving the two shear arms from opening to closing, thereby cutting the end filaments located between the two concave arcs of the two shear arms; S06. The capture device is pulled out to the outside of the human body model, and the ferrule of the capture device carries the cut end filament, enters the second channel through the outlet of the second channel, and then passes through the inlet of the second channel, the inner hole of the side tube and the flare of the side tube in sequence, and is discharged to the outside of the human body model; S07. Withdraw the sheath and close the wound.

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