CN111658253B - A kind of cardiovascular stent delivery device - Google Patents

Abstract

The invention belongs to the field of medical equipment, and relates to a cardiovascular stent delivery device, which includes a sleeve, the head end of which is provided with an accommodating space, a push tube, and a distraction system, which is used to The support is stretched, the push tube is slidably connected to the casing, and the stretching system is slidably connected to the casing. The present invention can push the distraction system and the cardiovascular stent on the distraction system to the atherosclerotic part of the artery through the push tube, and the cardiovascular scaffold can be quickly stretched through the distraction system. The operation is simple and convenient, and it has better adjustable and can be reused.

Description

A kind of cardiovascular stent delivery device

technical field

The invention relates to the field of medical devices, in particular to a cardiovascular stent delivery device.

Background technique

The heart is a hollow muscular organ located in the middle of the thoracic cavity. It is divided into two left and right chambers by a partition. Each chamber is divided into two parts: the upper atrium and the lower ventricle. The atrium collects blood from the heart, and the ventricle ejects The blood flows out of the heart, and the inlet and outlet of the ventricle have valves to ensure the one-way flow of blood. The cardiovascular system is composed of the heart and blood vessels, and the blood vessels include arteries, veins and capillaries.

Currently, atherosclerosis is the most common type of cardiovascular disease. In the treatment of atherosclerosis, a cardiovascular stent is generally placed in the artery, and the cardiovascular stent is used to expand the artery. Cardiovascular stents are generally made of memory alloys. Cardiovascular stents made of memory alloys are in a shrinking state at room temperature outdoors. When cardiovascular stents made of memory alloys are placed in arteries, the body temperature Cardiovascular stents can become expanded as the temperature increases, thereby achieving the effect of expanding arteries. However, how to deliver cardiovascular stents to atherosclerosis has always been a difficult problem.

Contents of the invention

The purpose of the present invention is to provide a cardiovascular stent delivery device to solve the problem that the cardiovascular stent is not easy to be delivered to the atherosclerosis of the artery.

The present invention provides a cardiovascular stent transporter, comprising a sleeve, the head end of the sleeve is provided with an accommodating space, a push tube, and an expansion system, the expansion system is used to expand the cardiovascular stent, the The pushing tube is slidably connected to the casing, and the expansion system is slidably connected to the casing.

Preferably, the spreading system includes a sliding bar, a front fixing sleeve, and a rear fixing sleeve, the sliding rod is slidably connected in the casing, the front fixing sleeve is fixedly connected to the sliding bar, and the rear fixing sleeve is connected to the push tube Fixedly connected, several expansion parts are arranged between the front fixing sleeve and the rear fixing sleeve.

Preferably, the spreader includes a first spreader rod, a second spreader rod, a third spreader rod, a first hinged seat, and a second hinged seat, and the first hinged seat is arranged on the front fixing sleeve , the second hinge seat is arranged on the rear fixed sleeve, the first spreader rod, the second spreader rod and the third spreader rod are sequentially hinged, the other end of the first spreader rod is connected to the first hinged seat Hinged, the other end of the third spreading rod is hinged with the second hinged seat.

Preferably, both the front fixing sleeve and the rear fixing sleeve are in the shape of a truncated cone, the lower bottom of the front fixing sleeve is opposite to the lower bottom of the rear fixing sleeve, and the first hinge seat is located at the upper bottom of the front fixing sleeve edge, and the second hinge seat is located on the upper bottom edge of the rear fixed sleeve.

Preferably, the present invention further includes an auxiliary introduction head, and the auxiliary introduction head is detachably connected to the head of the slide rod.

Preferably, the auxiliary introduction head includes an integrally formed introduction part and an auxiliary guide part, the introduction part is a domed cone, and the auxiliary guide part is an inverted truncated cone.

Preferably, the inner peripheral side of the head end of the sleeve is provided with an inner chamfer matched with the auxiliary guide part.

The beneficial effects of the present invention are:

First, a cardiovascular stent transporter of the present invention can push the cardiovascular stent to the atherosclerotic part of the artery by pushing the push tube, and quickly expand the cardiovascular stent through the expansion system, and its operation is simple and convenient.

Second, in the cardiovascular stent transporter of the present invention, the expansion degree of the cardiovascular stent can be controlled by pulling the slide bar, which has better adjustability.

Its three, a kind of cardiovascular stent delivery device of the present invention can also be reused after being sterilized and cleaned after the whole delivery device is extracted from the artery.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a side view of the present invention,

Fig. 2 is a sectional view of the present invention,

Figure 3 is an enlarged view of A in Figure 2,

Fig. 4 is a diagram of the non-working state of the stretching system,

Figure 5 is a diagram of the working state of the opening system,

Fig. 6 is a view showing the completed state of the cardiovascular stent being stretched.

Reference signs: bushing 1, accommodation space 11, inner chamfer 12, push tube 2, spreader system 3, slide bar 31, front fixing sleeve 32, rear fixing sleeve 33, spreader 34, first spreader rod 341, the second expansion rod 342, the third expansion rod 343, the first hinged seat 344, the second hinged seat 345, the auxiliary introduction head 4, the introduction part 41, the auxiliary guide part 42, the cardiovascular stent 5, the artery 6, Atherosclerosis 61.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them.

As shown in Figures 1-6, a cardiovascular stent delivery device includes a sleeve 1, the head end of the sleeve 1 is provided with an accommodation space 11, a push tube 2, and a distraction system 3, and the distraction system 3 is used to The cardiovascular stent 5 is stretched, the push tube 2 is slidably connected to the sleeve 1, and the spread system 3 is slidably connected to the sleeve 1; in the state of use, the push tube 2 can push the spread system 3 and the stretch system 3 The cardiovascular stent 5 on the top is pushed out from the accommodation space 11 of the sleeve 1 , and the cardiovascular stent 5 can be expanded by the expansion system 3 .

In a specific embodiment, the expansion system 3 includes a sliding rod 31, a front fixing sleeve 32, and a rear fixing sleeve 33, the sliding rod 31 is slidably connected in the casing 1, and the front fixing sleeve 32 is fixedly connected with the sliding rod 31, The rear fixed sleeve 33 is fixedly connected with the push pipe 2, and several stretching parts 34 are arranged between the front fixed sleeve 32 and the rear fixed sleeve 33; The slide bars 31 move synchronously, and then all the stretching parts 34 can be transformed into a stretching state, and the degree of stretching is determined by the distance between the front fixing sleeve 32 and the rear fixing sleeve 33 .

In a specific embodiment, the spreader 34 includes a first spreader 341, a second spreader 342, a third spreader 343, a first hinged seat 344, and a second hinged seat 345, the first hinged The seat 344 is arranged on the front fixed sleeve 32, the second hinged seat 345 is arranged on the rear fixed sleeve 33, the first spreader bar 341, the second spreader bar 342 and the third spreader bar 343 are hinged sequentially, the first spreader The other end of the opening rod 341 is hinged to the first hinged seat 344, and the other end of the third spreading rod 343 is hinged to the second hinged seat 345; as shown in Figures 4 and 5, when the slide bar 31 is pulled backward, The front fixed sleeve 32 can gradually approach the rear fixed sleeve 33, and one end of the first spread rod 341 on the front fixed sleeve 32 can rotate around the hinge of the first hinge seat 344, and the third spread rod 343 of the rear fixed sleeve 33 One end rotates around the hinge of the second hinge seat 345, and its rotation direction is opposite to that of the first spreading rod 341. At the same time, the distance between the second spreading rod 342 and the axis of the sliding rod 31 increases gradually, that is, Complete the prop work. Wherein, the first hinged seat 344 can be fixed to the front fixing sleeve 32 by welding, and the second hinged seat 345 can be fixed to the rear fixing sleeve 33 by welding.

In a specific embodiment, both the front fixing sleeve 32 and the rear fixing sleeve 33 are in the shape of a truncated cone, the lower bottom of the front fixing sleeve 32 is opposite to the lower bottom of the rear fixing sleeve 33, and the first hinge seat 344 is located at the front fixing sleeve. The upper bottom edge of the sleeve 32, the second hinged seat 345 is located at the upper bottom edge of the rear fixed sleeve 33; The initial states are all in an inclined state, which can ensure that when the sliding bar 31 is pulled, the second spreading rod 342 can always move outward, that is, it can ensure that the cardiovascular stent 5 can be stretched.

In a specific embodiment, the present invention also includes an auxiliary introduction head 4, which is detachably connected to the head of the slide bar 31; the auxiliary introduction head 4 can increase the convenience of the entire conveyor entering the artery 6, And the auxiliary introduction head 4 can also close the opening of the casing 1 .

In a specific embodiment, the auxiliary introduction head 4 includes an integrally formed introduction part 41 and an auxiliary guide part 42, the introduction part 41 is a dome cone, and the auxiliary guide part 42 is an inverted frustum of a cone; as shown in Fig. 2 and Fig. 3, the introduction portion 41, which is a dome-shaped cone, can serve as a guide to enter the artery 6. In an unused state, the auxiliary guiding portion 42 is located in the receiving space 11 . When the cardiovascular stent 5 needs to be pulled away from the whole conveyor after being stretched, the outer wall of the auxiliary guide part 42 which is an inverted frustum body can play a guiding role, preventing the auxiliary guide part 42 from colliding with the end of the cardiovascular stent 5 , the excessive pulling force is transmitted to the cardiovascular stent 5 and causes the position of the cardiovascular stent 5 to deviate.

In a specific embodiment, the inner peripheral side of the head end of the sleeve 1 is provided with an inner chamfer 12 that cooperates with the auxiliary guide part 42; in this way, there will be no excessive gap between the auxiliary introduction head 4 and the sleeve 1 , and also play an auxiliary guiding role for the third spreading rod 343 on the rear fixing sleeve 33 to return to its original state.

The working principle of the present invention: as shown in Fig. 4 to Fig. 6, the whole conveyor is inserted into the artery 6 first, and then the sliding rod 31 and the expansion system 3 are pushed out of the accommodating space 11 of the casing 1 by pushing the push tube 2 Push out, the position of the cardiovascular stent 5 on the distraction system 3 is just at the atherosclerosis 61 of the artery 6, and then pull the slide bar 31 backwards, the slide bar 31 drives the front fixed sleeve 32 to gradually approach the rear fixed sleeve 33 One end of the first spreading rod 341 on the front fixing sleeve 32 can rotate around the hinge of the first hinge seat 344, and one end of the third spreading rod 343 of the rear fixing sleeve 33 can rotate around the hinge of the second hinge seat 345. Rotate, its rotation direction is opposite to the rotation direction of the first spreading rod 341, meanwhile, the distance of all the second spreading rods 342 from the axis of the slide bar 31 increases gradually, all the second spreading rods 342 can be positioned at their Cardiovascular stent 5 on the upper part is stretched out quickly. After the expansion is completed, the sliding bar 31 is pushed forward to restore the expansion system 3 to its original state, and at the same time, the push tube 2 is pulled backward so that the expansion system 3 can be retracted into the accommodation space 11 again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (3)

1. A cardiovascular stent delivery device, characterized by:

comprises a sleeve (1), wherein the head end of the sleeve (1) is provided with an accommodating space (11),

push tube (2), and

the opening system (3), the opening system (3) is used for opening the cardiovascular stent (5),

the pushing tube (2) is connected to the sleeve (1) in a sliding manner, and the opening system (3) is connected with the sleeve (1) in a sliding manner;

the opening system (3) comprises a sliding rod (31),

a front fixing sleeve (32), and

a rear fixing sleeve (33),

the sliding rod (31) is connected in the sleeve (1) in a sliding way, the front fixing sleeve (32) is fixedly connected with the sliding rod (31), the rear fixing sleeve (33) is fixedly connected with the pushing tube (2), and a plurality of supporting pieces (34) are arranged between the front fixing sleeve (32) and the rear fixing sleeve (33);

the device also comprises an auxiliary introducing head (4), wherein the auxiliary introducing head (4) is detachably connected to the head of the sliding rod (31); the auxiliary introducing head (4) comprises an introducing part (41) and an auxiliary guiding part (42) which are integrally formed, wherein the introducing part (41) is a dome cone, and the auxiliary guiding part (42) is an inverted frustum; an inner chamfer (12) matched with the auxiliary guide part (42) is arranged on the inner peripheral side of the head end of the sleeve (1).

2. A cardiovascular stent delivery device according to claim 1, wherein: the spreader (34) comprises a first spreader bar (341),

a second spreader bar (342),

a third spreader bar (343),

a first hinge base (344), and

a second hinge base (345),

the first hinging seat (344) is arranged on the front fixing sleeve (32), the second hinging seat (345) is arranged on the rear fixing sleeve (33), the first propping rod (341), the second propping rod (342) and the third propping rod (343) are sequentially hinged, the other end of the first propping rod (341) is hinged with the first hinging seat (344), and the other end of the third propping rod (343) is hinged with the second hinging seat (345).

3. A cardiovascular stent delivery device according to claim 2, wherein: the front fixing sleeve (32) and the rear fixing sleeve (33) are both frustum-shaped, the lower bottom of the front fixing sleeve (32) and the lower bottom of the rear fixing sleeve (33) are oppositely arranged, the first hinging seat (344) is located at the upper bottom edge of the front fixing sleeve (32), and the second hinging seat (345) is located at the upper bottom edge of the rear fixing sleeve (33).