CN111632255B

CN111632255B - Vasodilator for cardiovascular internal medicine and preparation method thereof

Info

Publication number: CN111632255B
Application number: CN202010349596.1A
Authority: CN
Inventors: 王纪人; 吴玥婷; 张杨
Original assignee: Guizhou Provincial Peoples Hospital
Current assignee: Guizhou Provincial Peoples Hospital
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2022-04-29
Anticipated expiration: 2040-04-28
Also published as: CN111632255A

Abstract

The invention discloses a blood vessel dilating tube for cardiovascular internal medicine and a preparation method thereof, wherein the dilating tube comprises a sheath tube, a dilating frame and a handheld seat; a first guide tube and a second guide tube are arranged in the sheath tube, a guide wire is arranged in the first guide tube, a main traction wire is arranged in the second guide tube, a positioning head and a spring ring are arranged at the end part of the sheath tube, a first auxiliary traction wire is arranged on the spring ring, the first auxiliary traction wire is connected with the main traction wire, the expansion frame comprises a first-stage expansion frame and a second-stage expansion frame, the first-stage expansion frame comprises a sliding sleeve and an expansion strip, the sliding sleeve is sleeved on the sheath tube, the expansion strip is arranged on the sliding sleeve, a second auxiliary traction wire is arranged on the sliding sleeve, the second auxiliary traction wire is connected with the main traction wire, the second-stage expansion frame is arranged on the outer side of the expansion strip, a third auxiliary traction wire is arranged on the second-stage expansion frame, and the third auxiliary traction wire is connected with one end of the main traction wire; the handheld base is connected with the sheath tube, a rotating column is clamped on the handheld base and is connected with the main traction wire; the invention has reasonable structural design, safe and convenient operation and is suitable for large-scale popularization.

Description

Vasodilator for cardiovascular internal medicine and preparation method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a vasodilating tube for cardiovascular medicine and a preparation method thereof.

Background

Vasodilators are medical devices used in the field of vascular intervention for the treatment of vascular occlusions. After observing the lesion part through the angiography of the lesion part, an operator selects a balloon with a proper size and a bracket with a corresponding model, sends the balloon catheter to the stenosis part, injects a certain pressure to fully expand the balloon, expands the stenotic or blocked blood vessel by utilizing the mechanical squeezing action of the balloon expansion, releases the bracket and achieves the curative effect of treating the blood vessel blockage.

However, the existing vasodilating tubes generally have the following defects in use: 1. the blood vessel expansion degree is not adjustable, when the expansion balloon is expanded to the maximum extent and cannot meet the use condition, the blood vessel expansion tube needs to be removed, and the expansion balloon with a larger size needs to be selected again, so that the pain of a patient is undoubtedly increased, and the risk of an operation is also increased; 2. when the expansion balloon is used, the expansion balloon is easy to displace due to the extrusion effect of blood vessels, and the blood vessel expansion effect is not ideal; 3. in the process of balloon expansion, the expansion degree is not easy to control, dangerous accidents such as blood vessel rupture and the like of a patient are easily caused, and the safety is poor.

Disclosure of Invention

In view of the above technical problems, the present invention provides a vessel-expanding tube for cardiovascular medicine, which is convenient for controlling the opening degree of vessel expansion.

The technical scheme of the invention is as follows: a blood vessel dilating tube for cardiovascular internal medicine comprises a sheath tube, a dilating frame and a handheld seat; one end of the sheath tube is closed, a first guide ring and a second guide ring are fixedly sleeved on the outer side close to the closed end of the sheath tube in sequence, a first guide tube and a second guide tube are arranged in the sheath tube, the first guide tube is located at the central position inside the sheath tube, a guide wire is movably arranged in the first guide tube, 3 second guide tubes are arranged in the second guide tube, the 3 second guide tubes are respectively located on the outer sides of the first guide tube, and main traction wires are arranged in the 3 second guide tubes; the end closed end of the sheath tube is provided with a positioning head, the positioning head is of a smooth conical structure and is hollow inside, the head of the positioning head is inwards recessed and is provided with a through hole, a hollow tube is arranged at the joint of the positioning head and the sheath tube, the inner side of the tail of the positioning head is provided with a spring ring, the position of a first guide ring corresponds to the position of the spring ring, the inner side of the spring ring is uniformly provided with 5-8 first auxiliary traction wires, the 5-8 first auxiliary traction wires are hinged together after penetrating through the first guide ring and the sheath tube respectively, and the hinged part is connected with one end of one main traction wire; the expansion frame comprises a primary expansion frame and a secondary expansion frame, the primary expansion frame comprises two sliding sleeves and two expansion strips, the two sliding sleeves are movably sleeved on the sheath tube and are positioned on two sides of the guide ring II, the expansion strips are provided with 5-8 expansion strips, the 5-8 expansion strips are uniformly arranged between the two sliding sleeves, one sliding sleeve is connected with a secondary traction wire II, the secondary traction wire II penetrates through the outer wall of the sheath tube and is connected with one end of the other main traction wire, the secondary expansion frame is arranged on the outer side of the expansion strips, the secondary expansion frame is connected with a secondary traction wire III, and the secondary traction wire III penetrates through the guide ring II and the sheath tube and is connected with one end of the last main traction wire; the fixed open end that sets up at the sheath pipe of handheld seat, the fixed seal wire pipe that is provided with of one end of keeping away from the sheath pipe on the handheld seat, seal wire pipe and guiding tube one switch on, and the equal movable joint in wherein 3 sides of handheld seat has the column spinner, and 3 column spinners are 3 main traction wire's other end connection respectively, and 3 column spinners are used for winding 3 main traction wire respectively.

Furthermore, the number of the secondary expansion frames is consistent with the number of the expansion strips correspondingly, each secondary expansion frame comprises an expansion plate and a mounting sleeve, each expansion plate is an arc-shaped plate, the mounting direction of each expansion plate is consistent with the length direction of each expansion strip, two support rods are slidably clamped in the inner side of each expansion plate, the mounting sleeves are fixedly connected with the middle parts of the expansion strips, sliding columns are movably sleeved in the mounting sleeves, the other ends of the two support rods penetrate through the mounting sleeves and are movably hinged with the sliding columns respectively, the bottom end of each sliding column is connected with a third auxiliary traction wire, each third auxiliary traction wire penetrates through a first guide ring and a sheath tube and is hinged together, and the hinge point is connected with one end of the last main traction wire; when one-level expansion frame still can not reach the vasodilatation requirement when expanding furthest, through rotating a certain column spinner for the vice traction wire of main traction wire pulling that the column spinner corresponds is three, and each slip post slides in the mounting sleeve, is close to the expansion strip, and then makes two bracing pieces draw close, outwards struts the expansion plate, improves vascular expansion degree, provides the advantage for cardiovascular disease's treatment.

Furthermore, a movable sleeve is arranged at the joint of the rotating column and the handheld seat, the rotating column is movably sleeved in the movable sleeve, a locking disc is arranged at the bottom of the rotating column, a clamping groove is formed in the locking disc, a clamping block is arranged at the bottom of the movable sleeve and can be clamped with the clamping groove, a clamp spring is arranged in the movable sleeve and is sleeved on the rotating column, the upper end of the clamp spring is abutted against the outer wall of the rotating column, and the lower end of the clamp spring is abutted against the inner wall of the movable sleeve; during the use, press the column spinner downwards, make draw-in groove and fixture block on the locking dish break away from, then rotate the column spinner, twine the rolling to corresponding main traction wire, after the rolling was accomplished, make the locking dish under the effect of jump ring with the fixture block joint, it is not hard up to avoid the vasodilatation in-process to mainly pull the silk, improves the vasodilatation effect.

Furthermore, a head end of the positioning head is provided with a guide groove along the length direction; through setting up the guide way, reduce the resistance of location head in patient's blood vessel, make the removal of location head in patient's blood vessel more smooth and easy, alleviate patient's misery.

Furthermore, the secondary traction wire II is fixedly connected with one sliding sleeve, then passes through the other sliding sleeve and is finally fixedly connected with the other main traction wire; when the main traction wire pulls the auxiliary traction wire II, the two sliding sleeves are close to each other, and the expansion strip is extruded and bent to play a role in supporting blood vessels; and the supporting point of the expansion strip can not change along with the movement of the sliding sleeve, so that the accuracy of the supporting point position of the blood vessel is improved.

Furthermore, the expansion strip is of a thin plate structure, and the pressure of the expansion strip and the inner wall of the blood vessel of the patient is reduced by arranging the expansion strip of the thin plate structure, so that the blood vessel of the patient is prevented from being broken in the expansion process of the expansion strip, and the safety of the device is improved.

The invention also provides a preparation method of the vascular dilation tube, which comprises the following steps:

firstly, respectively carrying out pressurization heating blow molding on a hollow pipe by using a mold to prepare a sheath pipe, a positioning head, a hollow pipe and a guide wire catheter; adding a spring ring in the forming process of the positioning head;

step two, utilizing a hollow pipe to perform pressurization, heating and blow molding to prepare a first guide pipe and a second guide pipe, adhering and fixing 3 second guide pipes outside the first guide pipe, and finally sleeving the first guide pipe and the second guide pipe inside a sheath pipe in a penetrating manner and adhering and fixing the first guide pipe and the second guide pipe with the inner wall of the sheath pipe;

thirdly, respectively penetrating main traction wires in the guide tubes II;

step four, injection molding a first guide ring, a second guide ring and a first-stage expansion frame, wherein a first auxiliary traction wire and a second auxiliary traction wire are added in the first guide ring and the second guide ring in the molding process; then placing a second guide ring in the middle of the first-stage expansion frame, penetrating and sleeving the second guide ring and the first-stage expansion frame outside the sheath tube, finally bonding and fixing the second guide ring and the sheath tube, and connecting an auxiliary traction wire II with the first-stage expansion frame, then putting the auxiliary traction wire II into the sheath tube, and connecting the auxiliary traction wire II with one main traction wire; sleeving the guide ring at the end part of the sheath tube, bonding and fixing the positioning head with the end part of the sheath tube through the hollow tube, and connecting the auxiliary traction wire I with the spring ring, penetrating through the sheath tube and connecting with the other main traction wire;

step five, injection molding a secondary expansion frame, adding a secondary traction wire III in the molding process of the secondary expansion frame, installing the secondary expansion frame outside the primary expansion frame, and connecting the secondary traction wire III with the last main traction wire after penetrating through the sheath tube;

and step six, preparing a handheld seat by stamping, respectively bonding and fixing a guide wire guide pipe and a sheath pipe on two sides of the handheld seat, penetrating a guide wire into the guide pipe I through the guide wire guide pipe, and respectively fixedly welding 3 rotating columns on the handheld seat with the other ends of the 3 main traction wires.

The using method of the invention comprises the following steps: when the positioning head is used, a guide wire penetrates into a first guide tube through a guide wire catheter on the handheld seat, a sheath tube is inserted into a blood vessel of a patient under the action of the guide wire, the position of the positioning head is observed through external X-ray equipment, after the positioning head penetrates through a diseased part of the blood vessel of the patient, the sheath tube stops being inserted, a rotating column corresponding to the first auxiliary traction wire and the main traction wire is rotated, the first auxiliary traction wire is loosened, the positioning head is stretched by a spring ring and fixed at a specified position in the blood vessel of the patient, and at the moment, a circulation channel is established for blood through the through hole and the hollow tube; by rotating the rotary columns corresponding to the secondary traction wire II and the main traction wire, when the main traction wire pulls the secondary traction wire II, the two sliding sleeves are close to each other, the expansion strip is extruded and bent to support and expand the diseased region of the patient, and when the expansion strip is expanded to the maximum, the auxiliary traction wire III pulls each sliding column to slide in the mounting sleeve and approach the expansion strip by rotating the rotary columns corresponding to the main traction wire and the auxiliary traction wire III, so that the two support rods are close to each other to expand the expansion plate outwards, and the blood vessel of the diseased region of the patient is expanded; after the use, the steps are operated in a reverse direction, and the sheath tube is removed through the handheld seat.

Compared with the prior art, the invention has the beneficial effects that: the sheath tube is reasonable in structural design, convenient and safe to operate, and the guide wire and the main traction wire can move more smoothly by arranging the different guide tubes I and II in the sheath tube; by arranging the positioning head, the positioning head is fixed at a certain specific position in the blood vessel of a patient by utilizing the spring ring, and the displacement of the primary expansion frame and the secondary expansion frame in the process of the blood vessel expansion operation is avoided, so that the practicability and the effectiveness of the device are improved, and the device has a positive effect on the rehabilitation of patients with cardiovascular diseases; meanwhile, the first-stage expansion frame and the second-stage expansion frame are arranged, the sheath tube only needs to enter the blood vessel of the patient once, so that the blood vessel of the patient can be expanded in different degrees, the pain of the patient is greatly relieved, and the risk of the operation is reduced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention in an initial state;

fig. 2 is a schematic structural view of the primary expansion frame and positioning head of the present invention in a supporting state;

FIG. 3 is a schematic structural view of the first stage expansion frame, the second stage expansion frame and the positioning head of the present invention when fully expanded;

FIG. 4 is a profile of a first guide tube and a second guide tube of the present invention within a sheath;

FIG. 5 is a schematic view of the positioning head of the present invention;

FIG. 6 is a schematic view of the connection of the positioning head of the present invention to the sheath;

fig. 7 is a schematic view of the connection of the secondary expansion frame to the primary expansion frame of the present invention;

FIG. 8 is a schematic view of the connection of the spin column of the present invention to a traveling sleeve;

FIG. 9 is a schematic view of the connection of the handpiece to the sheath of the present invention;

wherein, 1-sheath tube, 10-guide ring I, 11-guide ring II, 12-guide tube I, 13-guide tube II, 14-positioning head, 140-through hole, 141-hollow tube, 142-spring ring, 143-auxiliary traction wire I, 144-guide groove, 2-expansion frame, 20-first-stage expansion frame, 200-sliding sleeve, 201-expansion strip, 202-auxiliary traction wire II, 21-second-stage expansion frame, 210-auxiliary traction wire III, 211-expansion plate, 212-mounting sleeve, 213-supporting rod, 214-sliding column, 3-hand holder, 30-guide wire catheter, 31-rotating column, 310-locking disc, 311-clamping groove, 32-movable sleeve, 320-clamping block, 321-clamping spring, 4-guide wire, 5-main traction wire.

Detailed Description

Example (b): a blood vessel dilating tube for cardiovascular internal medicine, as shown in fig. 1, 4, 5 and 6, comprises a sheath tube 1, a dilating frame 2 and a hand-held seat 3; one end of the sheath tube 1 is closed, a first guide ring 10 and a second guide ring 11 are fixedly sleeved on the outer side close to the closed end of the sheath tube 1 in sequence, a first guide tube 12 and a second guide tube 13 are arranged in the sheath tube 1, the first guide tube 12 is located at the central position in the sheath tube 1, a guide wire 4 is movably arranged in the

first guide tube

12, 3 guide tubes 13 are arranged, 3 guide tubes two 13 are respectively located on the outer sides of the first guide tube 12, and a main traction wire 5 is arranged in each of the 3 guide tubes two 13; the end closed end of the sheath tube 1 is provided with a positioning head 14, the positioning head 14 is of a smooth conical structure and is hollow inside, the head of the positioning head 14 is recessed inwards and is provided with a through hole 140, a hollow tube 141 is arranged at the joint of the positioning head 14 and the sheath tube 1, the inner side of the tail of the positioning head 14 is provided with a spring ring 142, the position of a guide ring I10 corresponds to the position of the spring ring 142, the inner side of the spring ring 142 is uniformly provided with 6 auxiliary traction wires I143, the 6 auxiliary traction wires I143 are hinged together after penetrating through the guide ring I10 and the sheath tube 1 respectively, and the hinged part is connected with one end of one main traction wire 5; a guide groove 144 is formed at the head end of the positioning head 14 along the length direction thereof; by arranging the guide groove 144, the resistance of the positioning head 14 in the blood vessel of the patient is reduced, so that the positioning head 14 can move more smoothly in the blood vessel of the patient, and the pain of the patient is relieved;

as shown in fig. 2, 3 and 7, the expansion frame 2 comprises a first-stage expansion frame 20 and a second-stage expansion frame 21, the first-stage expansion frame 20 comprises two sliding sleeves 200 and two expansion strips 201, the two sliding sleeves 200 are movably sleeved on the sheath tube 1 and located on two sides of the guide ring II 11, the expansion strips 201 are 6, the 6 expansion strips 201 are uniformly arranged between the two sliding sleeves 200, the expansion strips 201 are in a thin plate structure, the pressure between the expansion strips 201 and the inner wall of the blood vessel of the patient is reduced by arranging the expansion strips 201 in the thin plate structure, the blood vessel of the patient is prevented from being broken in the expansion process of the expansion strips 201, and the safety of the device is improved; the sliding sleeve 200 is connected with a secondary traction wire II 202, the secondary traction wire II 202 is fixedly connected with one sliding sleeve 200, then passes through the other sliding sleeve 200 and is finally fixedly connected with the other main traction wire 5; when the main traction wire 5 pulls the secondary traction wire II 202, the two sliding sleeves 200 are close to each other, and the expansion strip 201 is extruded and bent to play a role in supporting blood vessels; the supporting point of the expansion strip 201 cannot change along with the movement of the sliding sleeve 200, so that the accuracy of the blood vessel supporting point position is improved; the secondary expansion frame 21 is arranged on the outer side of the expansion strip 201, the secondary expansion frame 21 is connected with a third auxiliary traction wire 210, and the third auxiliary traction wire 210 penetrates through the second guide ring 11 and the sheath tube 1 and then is connected with one end of the last main traction wire 5; the number of the second-stage expansion frames 21 is consistent with that of the expansion strips 201 correspondingly, each second-stage expansion frame 21 comprises an expansion plate 211 and a mounting sleeve 212, each expansion plate 211 is an arc-shaped plate, the mounting direction of each expansion plate 211 is consistent with the length direction of each expansion strip 201, two support rods 213 are slidably clamped on the inner side of each expansion plate 211, the mounting sleeves 212 are fixedly connected with the middle parts of the expansion strips 201, sliding columns 214 are movably sleeved in the mounting sleeves 212, the other ends of the two support rods 213 penetrate through the mounting sleeves 212 and are movably hinged with the sliding columns 214 respectively, the bottom end of each sliding column 214 is connected with an auxiliary traction wire III 210, each auxiliary traction wire III 210 penetrates through a guide ring I10 and a sheath tube 1 respectively and is hinged together, and the hinged point is connected with one end of the last main traction wire 5; when the first-stage expansion frame 20 is expanded to the maximum extent and does not meet the requirement of blood vessel expansion, the main traction wire 5 corresponding to the rotating column 31 pulls the auxiliary traction wire III 210 by rotating one rotating column 31, each sliding column 214 slides in the mounting sleeve 212 and is close to the expansion strip 201, so that the two support rods 213 are closed, the expansion plate 211 is expanded outwards, the expansion degree of the blood vessel is improved, and favorable conditions are provided for treatment of cardiovascular diseases;

as shown in fig. 1, 8 and 9, the handheld base 3 is fixedly arranged at an opening end of the sheath tube 1, one end of the handheld base 3, which is far away from the sheath tube 1, is fixedly provided with a guide wire guide tube 30, the guide wire guide tube 30 is communicated with the guide tube one 12, 3 side surfaces of the handheld base 3 are movably clamped with rotating columns 31, the 3 rotating columns 31 are respectively connected with the other ends of 3 main traction wires 5, and the 3 rotating columns 31 are respectively used for winding the 3 main traction wires 5; a movable sleeve 32 is arranged at the joint of the rotating column 31 and the handheld base 3, the rotating column 31 is movably sleeved in the movable sleeve 32, a locking disc 310 is arranged at the bottom of the rotating column 31, a clamping groove 311 is arranged on the locking disc 310, a clamping block 320 is arranged at the bottom of the movable sleeve 32, the clamping block 320 can be clamped with the clamping groove 311, a clamping spring 321 is arranged in the movable sleeve 32, the clamping spring 321 is sleeved on the rotating column 31, the upper end of the clamping spring 321 is abutted against the outer wall of the rotating column 31, and the lower end of the clamping spring is abutted against the inner wall of the movable sleeve 32; when the blood vessel dilator is used, the rotary column 31 is pressed downwards to enable the clamping groove 311 on the locking disc 310 to be separated from the clamping block 320, then the rotary column 31 is rotated to wind and roll the corresponding main traction wire 5, and after the winding is finished, the locking disc 310 is clamped with the clamping block 320 under the action of the clamping spring 321, so that the main traction wire 5 is prevented from loosening in the blood vessel dilating process, and the blood vessel dilating effect is improved; the sheath tube 1, the guide wire catheter 30, the positioning head 14 and the hollow tube 141 are all made of PET materials, the guide wire 4 and the main traction wire 5 are all made of nickel-titanium alloy wires, the diameter of the guide wire 4 is 0.55mm, and the diameter of the main traction wire 5 is 0.25 mm; the first stage expansion frame 20 and the second stage expansion frame 21 are both made of titanium-nickel alloy material covered with silica gel coating.

The preparation method of the vasodilator of the embodiment comprises the following steps:

step one, respectively carrying out pressurization heating blow molding on a hollow pipe by using a mold to prepare a sheath pipe 1, a positioning head 14, a hollow pipe 141 and a guide wire catheter 30; a spring ring 142 is added in the forming process of the positioning head 14;

step two, pressurizing, heating and blow-molding the hollow pipe to prepare a first guide pipe 12 and a second guide pipe 13, adhering and fixing 3 second guide pipes 13 outside the first guide pipe 12, and finally sleeving the first guide pipe 12 and the second guide pipe 13 inside the sheath pipe 1 in a penetrating manner and adhering and fixing the first guide pipe 12 and the second guide pipe 13 with the inner wall of the sheath pipe 1;

thirdly, respectively penetrating main traction wires 5 into the guide tubes 13;

step four, injection molding is carried out on the first guide ring 10, the second guide ring 11 and the first-stage expansion frame 20, and the first auxiliary traction wire 143 and the second auxiliary traction wire 202 are added in the molding process of the first guide ring 10 and the second guide ring 11; then the second guide ring 11 is placed in the middle of the first-stage expansion frame 20 and is sleeved outside the sheath tube 1 along with the first-stage expansion frame 20, finally the second guide ring 11 is fixedly bonded with the sheath tube, and the second auxiliary traction wire 202 is connected with the first-stage expansion frame 20, then enters the sheath tube 1 and is connected with one main traction wire 5; sleeving the guide ring I10 at the end part of the sheath tube 1, bonding and fixing, finally bonding and fixing the positioning head 14 with the end part of the sheath tube 1 through the hollow tube 141, and connecting the auxiliary traction wire I143 with the spring ring 142, penetrating through the sheath tube 1 and connecting with the other main traction wire 5;

step five, injection molding of a secondary expansion frame 21, adding a secondary traction wire III 210 in the molding process of the secondary expansion frame 21, installing the secondary expansion frame 21 on the outer side of the primary expansion frame 20, and enabling the secondary traction wire III 210 to penetrate through the sheath tube 1 and then be connected with the last main traction wire 5;

and sixthly, preparing the handheld seat 3 by stamping, respectively bonding and fixing the guide wire guide pipe 30 and the sheath pipe 1 on two sides of the handheld seat 3, penetrating a guide wire 4 into the guide pipe I12 through the guide wire guide pipe 30, and respectively fixedly welding the 3 rotary columns 31 on the handheld seat 3 with the other ends of the 3 main traction wires 5.

When the positioning device is used, a guide wire 4 penetrates into a guide tube I12 through a guide wire catheter 30 on a handheld seat 3, a sheath tube 1 is inserted into a blood vessel of a patient under the action of the guide wire 4, the position of a positioning head 14 is observed through external X-ray equipment, after the positioning head 14 penetrates through a diseased part of the blood vessel of the patient, the sheath tube 1 stops being inserted, a rotating column 31 corresponding to an auxiliary traction wire I143 and a main traction wire 5 is rotated, the auxiliary traction wire I143 is loosened, a spring ring 143 props up the positioning head 14 and is fixed at a specified position in the blood vessel of the patient, and at the moment, blood establishes a circulation channel through a through hole 140 and a hollow tube 141; by rotating the rotary columns 31 corresponding to the second auxiliary traction wire 202 and the main traction wire 5, when the second auxiliary traction wire 202 is pulled by the main traction wire 5, the two sliding sleeves 200 are close to each other, the expansion strip 201 is extruded and bent to support and expand the diseased region of the patient, when the expansion strip 201 is expanded to the maximum, the third auxiliary traction wire 210 pulls the sliding columns 214 to slide in the mounting sleeve 212 and close to the expansion strip 201 by rotating the rotary columns 31 corresponding to the main traction wire 5 and the third auxiliary traction wire 210, so that the two supporting rods 213 are close to each other to expand the expansion plate 211 outwards, and the blood vessel of the diseased region of the patient is expanded; after the use, the above steps are operated in reverse, and the sheath 1 is removed by the hand-held seat 3.

Claims

1. A vasodilator for cardiovascular internal medicine is characterized by comprising a sheath tube (1), an expansion frame (2) and a handheld seat (3); one end of the sheath tube (1) is closed, a first guide tube (12) and a second guide tube (13) are sequentially and fixedly sleeved on the outer side close to the closed end of the sheath tube (1), the first guide tube (12) is positioned in the central position in the sheath tube (1), guide wires (4) are movably arranged in the first guide tube (12), 3 guide tubes (13) are arranged in the second guide tube (13), the 3 guide tubes (13) are respectively positioned on the outer sides of the first guide tube (12), and main traction wires (5) are arranged in the 3 guide tubes (13); the end closed end of the sheath tube (1) is provided with a positioning head (14), the positioning head (14) is of a smooth conical structure and is hollow inside, the head of the positioning head (14) is recessed inwards and is provided with a through hole (140), a hollow tube (141) is arranged at the joint of the positioning head (14) and the sheath tube (1), a spring ring (142) is arranged on the inner side of the tail of the positioning head (14), the position of the guide ring I (10) corresponds to the position of the spring ring (142), 5-8 auxiliary traction wires I (143) are uniformly arranged on the inner side of the spring ring (142), the 5-8 auxiliary traction wires I (143) respectively penetrate through the guide ring I (10) and the sheath tube (1) and then are hinged together, and the hinged part is connected with one end of one main traction wire (5); expand frame (2) including one-level expansion frame (20) and second grade expansion frame (21), one-level expansion frame (20) is including sliding sleeve (200) and expansion strip (201), sliding sleeve (200) are provided with two, and two equal movable sleeves of sliding sleeve (200) are established on sheath pipe (1), and are located the both sides of guide ring two (11), expansion strip (201) are provided with 5-8, and 5-8 expansion strip (201) evenly set up between two sliding sleeve (200), are connected with vice traction wire two (202) on one of them sliding sleeve (200), vice traction wire two (202) run through behind sheath pipe (1) outer wall and are connected with another main traction wire (5) one end wherein, second grade expansion frame (21) sets up in the expansion strip (201) outside, and second grade expansion frame (21) are connected with vice traction wire three (210), vice traction wire three (210) run through behind guide ring two (11) and sheath pipe (1) and last main traction wire (1), and vice traction wire three (210) (5) One end is connected; the handheld seat (3) is fixedly arranged at the opening end of the sheath tube (1), one end, far away from the sheath tube (1), of the handheld seat (3) is fixedly provided with a guide wire guide tube (30), the guide wire guide tube (30) is communicated with a guide tube I (12), 3 side faces of the handheld seat (3) are movably clamped with rotating columns (31), the 3 rotating columns (31) are respectively connected with the other ends of 3 main traction wires (5), and the 3 rotating columns (31) are respectively used for winding the 3 main traction wires (5);

the number of the secondary expansion frames (21) is corresponding to the number of the expansion strips (201), the secondary expansion frames (21) comprise expansion plates (211) and mounting sleeves (212), the expansion plate (211) is an arc-shaped plate, the installation direction of the expansion plate (211) is consistent with the length direction of the expansion strip (201), two support rods (213) are slidably clamped at the inner side of the expansion plate (211), the mounting sleeve (212) is fixedly connected with the middle part of the expansion strip (201), a sliding column (214) is movably sleeved in the mounting sleeve (212), the other ends of the two support rods (213) penetrate through the mounting sleeve (212) and then are movably hinged with the sliding column (214), the bottom end of each sliding column (214) is connected with an auxiliary traction wire III (210), each auxiliary traction wire III (210) penetrates through the guide ring I (10) and the sheath tube (1) respectively and then is hinged together, and the hinge point is connected with one end of the last main traction wire (5);

a movable sleeve (32) is arranged at the joint of the rotary column (31) and the handheld seat (3), the rotary column (31) is movably sleeved in the movable sleeve (32), a locking disc (310) is arranged at the bottom of the rotary column (31), a clamping groove (311) is formed in the locking disc (310), a clamping block (320) is arranged at the bottom of the movable sleeve (32), the clamping block (320) can be clamped with the clamping groove (311), a clamping spring (321) is arranged in the movable sleeve (32), the clamping spring (321) is sleeved on the rotary column (31), the upper end of the clamping spring (321) is abutted to the outer wall of the rotary column (31), and the lower end of the clamping spring is abutted to the inner wall of the movable sleeve (32);

the head end of the positioning head (14) is provided with a guide groove (144) along the length direction;

the secondary traction wire II (202) is fixedly connected with one sliding sleeve (200), then passes through the other sliding sleeve (200), and finally is fixedly connected with the other main traction wire (5);

the expansion strip (201) is of a thin plate-shaped structure.

2. The method of preparing a vasodilator tube according to claim 1, comprising the steps of:

firstly, respectively carrying out pressurization, heating and blow molding on a hollow pipe by using a mold to prepare a sheath tube (1), a positioning head (14), a hollow tube (141) and a guide wire catheter (30); a spring ring (142) is added in the forming process of the positioning head (14);

step two, preparing a first guide pipe (12) and a second guide pipe (13) by utilizing the pressurization, heating and blow molding of a hollow pipe, adhering and fixing 3 second guide pipes (13) on the outer side of the first guide pipe (12), and finally sleeving the first guide pipe (12) and the second guide pipe (13) in the sheath pipe (1) in a penetrating way and adhering and fixing the first guide pipe (12) and the second guide pipe (13) with the inner wall of the sheath pipe (1);

thirdly, respectively penetrating main traction wires (5) into the guide tubes II (13);

step four, injection molding is carried out on the guide ring I (10), the guide ring II (11) and the first-stage expansion frame (20), and an auxiliary traction wire I (143) and an auxiliary traction wire II (202) are added in the forming process of the guide ring I (10) and the guide ring II (11); then placing a second guide ring (11) in the middle of the first-stage expansion frame (20), penetrating and sleeving the second guide ring (11) and the first-stage expansion frame (20) at the outer side of the sheath tube (1), finally bonding and fixing the second guide ring (11) and the sheath tube, connecting a second auxiliary traction wire (202) with the first-stage expansion frame (20), then putting the second auxiliary traction wire into the sheath tube (1), and connecting the second auxiliary traction wire with one main traction wire (5); sleeving a guide ring I (10) at the end part of the sheath tube (1), bonding and fixing, finally bonding and fixing a positioning head (14) with the end part of the sheath tube (1) through a hollow tube (141), and connecting an auxiliary traction wire I (143) with a spring ring (142), penetrating through the sheath tube (1), and connecting with another main traction wire (5);

fifthly, injection molding of a secondary expansion frame (21), adding a secondary traction wire III (210) in the molding process of the secondary expansion frame (21), installing the secondary expansion frame (21) on the outer side of the primary expansion frame (20), and enabling the secondary traction wire III (210) to penetrate through the sheath tube (1) and then be connected with the last main traction wire (5);

and sixthly, preparing the handheld seat (3) by punching, respectively adhering and fixing the guide wire guide pipe (30) and the sheath pipe (1) on two sides of the handheld seat (3), penetrating a guide wire (4) into the guide pipe I (12) through the guide wire guide pipe (30), and respectively fixedly welding 3 rotating columns (31) on the handheld seat (3) with the other ends of the 3 main traction wires (5).