CN210872246U

CN210872246U - Prosthetic valve with flow director

Info

Publication number: CN210872246U
Application number: CN201921285288.6U
Authority: CN
Inventors: 代高旭; 陈晓
Original assignee: Shanghai Hanling Medical Devices Co ltd
Current assignee: Shanghai Hanling Medical Devices Co ltd; Shanghai Kangdelai Enterprise Development Group Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-06-30
Anticipated expiration: 2029-08-08

Abstract

The utility model relates to the technical field of medical equipment, concretely relates to prosthetic valves with flow director, the hemodynamic performance that aims at solving prosthetic valves among the prior art is still not ideal, leads to the problem of thrombus formation because of local torrent or delay easily, and its technical essential lies in including tubulose support main part, the inside valve ring that is equipped with of tubulose support main part, the valve ring is equipped with the inflow mouth and outflows the mouth, the cross sectional area of inflow mouth is greater than the cross sectional area of outflowing the mouth, and be close to inflow mouth one side of valve ring is equipped with the brim of a hat, is close to outflowing mouth one side of valve ring is equipped with the guide plate. The utility model discloses be the horn type at the influent stream mouth of valve ring, increased the entry area, compare the discharge bigger with ordinary valve under the same condition, and the setting up of guide plate effectively reduces or eliminates torrent and/or is detained to improve the hemodynamic performance of valve, reduced the possibility of thrombosis.

Description

Prosthetic valve with flow director

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to prosthetic valve with flow director.

Background

The heart is an important organ of the human body and provides circulation for blood of the human body, and four groups of valves are arranged inside the heart and control the direction of blood flow, wherein the valve between the left atrium and the left ventricle is a mitral valve, the valve between the right atrium and the right ventricle is a tricuspid valve, the valve between the left ventricle and the aorta is an aortic valve, and the valve between the right ventricle and the pulmonary artery is a pulmonary valve. The traditional treatment method for heart diseases is chest opening and valve replacement operation, the treatment means is mature and has definite effect, but the trauma is large in the operation process and a plurality of contraindications are provided. The recovery time of the patient after the operation is long, the problems that the anticoagulation drug needs to be taken for a long time after the valve is replaced, the valve use time is short and the like are still not overcome.

The minimally invasive chemical surgery technology is continuously developed, the artificial heart valve can be introduced into the body by a catheter, the operation does not need to be performed through a minimally invasive intervention method, the wound is small, the recovery is fast, a better solution is provided for elderly patients or patients who cannot tolerate conventional surgery, and the minimally invasive chemical surgery technology has good development and application prospects.

But just as the international standard ISO 5840-3 for prosthetic heart valves: 2013, "there is no ideal artificial heart valve so far". According to a great number of clinical follow-up results in recent years, the fourth-generation valve which is the bileaflet type artificial mechanical valve with the most clinical application at present has the defects that the prosthetic valve caused by local turbulence or stagnation can cause stasis and thrombus formation, although the hemodynamics performance is excellent and the incidence rate of complications related to the valve is low.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the hemodynamic performance of the prosthetic valve in the prior art is still not ideal and thrombosis is easily caused by local turbulence or retention, thereby providing a prosthetic valve with a flow guide.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the prosthetic valve with the flow guide device is characterized by comprising a tubular support body, wherein an annulus is arranged in the tubular support body and provided with an inflow opening and an outflow opening, the cross-sectional area of the inflow opening is larger than that of the outflow opening, a cap edge is arranged on one side, close to the inflow opening, of the annulus, and a guide plate is arranged on one side, close to the outflow opening, of the annulus.

Optionally, the annulus is provided with a fillet at the abrupt change in cross-sectional area to form a streamlined fluid passage.

Optionally, the brim height is 8% -15% of the annulus diameter.

Optionally, the brim is flanged outwards by 0.6-3 mm, and the flanging radian of the brim is R1-R6.

Optionally, the baffle is provided in number and secured around the circumference of the outflow opening of the annulus.

Optionally, each of the baffles is equally spaced.

Optionally, each of said baffles is longitudinally aligned.

Optionally, an in-situ angle is provided between each baffle and a longitudinal axis of the annulus.

The utility model discloses technical scheme has following advantage:

1. the utility model discloses in have the prosthetic valve of the director that flows, the setting of brim of a hat for the influent stream mouth of valve ring is the horn type, has increased the entry area, compares the outflow bigger with ordinary valve under the same condition, thereby has improved the hemodynamic performance of valve, and simultaneously, the smooth surface of brim of a hat can prevent the thrombus and excessively increase, prevents that thrombus growth from hindering the bad consequence of leaflet activity.

2. The utility model discloses in have the prosthetic valve of flow director, the valve ring is equipped with smooth portion in cross sectional area sudden change department to form streamlined fluid passage and reduce the resistance coefficient when the cross section changes, further optimized the blood flow dynamics performance of valve.

3. The utility model discloses in have the prosthetic valve of flow director, the brim of a hat height is 8% -15% of valve ring diameter, and its outside turn-ups 0.6-3 mm, the turn-ups radian is R1-R6, thereby when the brim of a hat size is too little, the flow through the valve increases unobviously, can not reach the purpose that prevents the thrombus growth, when the brim of a hat size is too big, can form a dead angle between brim of a hat outer fringe and vascular inner wall, the vortex can be produced here, and blood piles up and can produce the thrombus.

4. The utility model discloses in have the prosthetic valve of flow director, the setting of guide plate can change the blood flow direction who leaves the valve structure for eliminate or reduce torrent and/or stagnant area, reduce the possibility of thrombus formation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a prosthetic valve having a flow director according to one embodiment of the present invention;

fig. 2 is a top view of a prosthetic valve having a flow director according to one embodiment of the present invention.

Description of reference numerals:

1. a tubular stent body; 2. an annulus; 21. an inlet port; 22. an outflow port; 23. a brim; 24. a baffle; 25. a smooth portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A prosthetic valve with a flow guide device, as shown in figure 1, comprises a tubular stent body 1, wherein an annulus 2 is arranged inside the tubular stent body 1, the annulus 2 is provided with an inflow port 21 and an outflow port 22, wherein the cross-sectional area of the inflow port 21 is larger than that of the outflow port 22, and a brim 23 is arranged on one side of the inflow port 21 close to the annulus 2, so that the area of the inflow port 21 is enlarged together, therefore, on one hand, the flow rate per unit time is increased, and the flow rate passing through the wide inlet valve is increased along with the increase of the height and the outer edge size of the brim 23, but after the flow rate is increased to a certain extent, the flow rate is not increased even if the size of the brim 23 is increased; on the other hand, after the cap edge 23 is added, the smooth surface of the cap edge 23 can prevent thrombus from growing excessively, and the adverse effect that the thrombus grows to block the movement of the valve leaf is effectively prevented. At the same time, a baffle 24 is provided on the side of the outflow opening 22 close to the valve annulus 2, which can alter the direction of blood flow away from the valve structure, for eliminating or reducing turbulence and/or stagnation areas, reducing the possibility of thrombosis.

As shown in figure 1, the valve ring 2 is provided with a smooth part 25 at the position of the abrupt change of the cross-sectional area to form a streamline fluid channel, according to the fluid continuity theorem for describing the relationship between the fluid flow speed and the cross-sectional area, when the fluid continuously and stably flows through a pipeline with different thicknesses, because the fluid in any part of the pipeline can not be interrupted or squeezed, the mass of the fluid flowing into any cross section and the mass of the fluid flowing out from another cross section can be equal in the same time, and thus the energy loss when the fluid flows in the pipeline not only has the energy loss along the way along the length direction, but also has the local energy loss appearing in a local pipeline section. The local energy loss is mainly caused by the rapid change of a through-flow section and a flow direction, the rapid change of a velocity field, the increase of friction and collision among fluids, the formation of vortex and the like. Therefore, the smooth part 25 is matched with the guide plate 24, so that the hemodynamics characteristic is better, and the blood flow is more distinct, no transverse mixing exists, the cross-valve pressure difference is small, the return flow is low, and the energy loss is low.

As shown in figure 1, the height of the brim 23 is 8-15% of the diameter of the valve ring 2, the brim 23 is flanged outwards by 0.6-3 mm, and the flanging radian of the brim 23 is R1-R6, so that if the size of the brim 23 is too small, the flow rate increase through the valve is not obvious, and the aim of preventing thrombus growth can not be achieved; however, an oversized brim also has undesirable effects, such as: a dead space is formed between the outer edge of the brim 23 and the inner wall of the blood vessel, wherein vortex is generated, and blood accumulation generates thrombus; in addition, the brim 23 is too high, which can affect the valve chordae tendineae activity and the operation of the surgeon during the operation.

As shown in fig. 1 and 2, in particular, the baffles 24 are provided in several numbers and fixed around the circumference of the outflow opening 22 of the valve annulus 2, the baffles 24 are distributed at equal intervals, the baffles 24 are longitudinally aligned, and an alignment angle is provided between each baffle 24 and the longitudinal axis of the valve annulus 2.

The working principle of the prosthetic valve with the flow director is as follows: an arc-shaped cap edge 23 is added on one side of an inflow opening 21 of the valve ring 2 and forms a streamline passage with a smooth part 25 to enlarge the area of the inflow side, increase the flow in unit time and reduce the resistance coefficient when the section changes, thereby improving the hemodynamic performance of the valve, meanwhile, the smooth surface of the cap edge can prevent thrombus from excessively growing, and the adverse effect that thrombus growth obstructs the movement of valve leaflets is prevented, in addition, a guide plate 24 is arranged on one side of an outflow opening 22 of the valve ring 2, the blood flow direction leaving the valve structure can be changed, the turbulent flow and/or stagnation area can be eliminated or reduced, and the possibility of thrombus formation is reduced.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The prosthetic valve with the flow guide device is characterized by comprising a tubular support body (1), wherein an annulus (2) is arranged inside the tubular support body (1), the annulus (2) is provided with an inflow port (21) and an outflow port (22), the cross-sectional area of the inflow port (21) is larger than that of the outflow port (22), a cap edge (23) is arranged on one side of the inflow port (21) close to the annulus (2), and a guide plate (24) is arranged on one side of the outflow port (22) close to the annulus (2).

2. The prosthetic valve with flow director according to claim 1, characterized in that the valve annulus (2) is provided with a rounding (25) at the abrupt change of cross-sectional area to form a streamlined fluid passage.

3. The prosthetic valve with flow director according to claim 1, wherein the height of the brim (23) is 8% -15% of the diameter of the annulus (2).

4. The prosthetic valve with flow director as claimed in claim 1, wherein said brim (23) is flanged outwardly 0.6-3 mm, said brim (23) having a flange curvature of R1-R6.

5. The prosthetic valve with flow director according to claim 1, characterized in that the deflector (24) is provided in several numbers and fixed around the circumference of the outflow opening (22) of the annulus (2).

6. The prosthetic valve with flow director as claimed in claim 5, wherein each said deflector (24) is equally spaced.

7. The prosthetic valve with flow director of claim 5, wherein each said baffle (24) is longitudinally aligned.

8. The prosthetic valve with flow director according to claim 5, characterized in that between each deflector (24) and the longitudinal axis of the annulus (2) there is provided an in-situ angle.