CN2605828Y

CN2605828Y - Artificial double leave heart valve with cotylic rotary joint

Info

Publication number: CN2605828Y
Application number: CN 03236262
Authority: CN
Inventors: 郑光明; 刘海涛; 滕茂林
Original assignee: Beijing Star Medical Devices Co ltd
Current assignee: Beijing Star Medical Devices Co ltd
Priority date: 2003-01-21
Filing date: 2003-01-21
Publication date: 2004-03-10
Anticipated expiration: 2013-01-21

Abstract

The utility model belongs to the physical therapy medical treatment instrument field, relating to a new rotary ball-joint double-leaflet mechanical heart valve prosthesis that can be implanted into the human body. The utility model comprises a valve ring, two semicircular valve leaflets, and a suture ring that is fixedly connected to a concave slot on the external wall of the valve ring, wherein, facets on both sides of the long shafts of the two valve leaflets are respectively provided with two ear-shaped convex parts or concave parts that are wedged in the globe shaft nests or the convex hemispheres on both sides of the inflow plane of the valve ring; the facets contact with an upper limited block and a lower limited block; an arrow-shaped convex platform is arranged on the outflow side that is arranged in the center of the two globe shaft nests or the convex hemispheres; the top end of the arrow-shaped platform forms a closure step for the closing of the valve leaflets together with the globe shaft nests or the convex hemispheres, and the internal side of the valve ring; the rotary joints of the valve leaflets are arranged separately from the limited blocks; the rotation shafts of the valve leaflets is free from the disturbance of the torque force and from the fatigue fracture; the globe shaft nest or the convex hemisphere of the valve leaflet is not provided with a dead corner, thus the blood flow can be washed thoroughly, and the thrombus will not be easily formed; when the valve leaflet is closed, the facets on both sides of the valve leaflet will contact with the closure step, thereby the return flow is small and the cavitation corrosion will be reduced.

Description

Pestle mortar formula cradle head bilobate Cardiac valve prosthesis

Technical field

This utility model belongs to the physiotherapy medical instruments field, relates to the novel pestle mortar formula cradle head bilobate Cardiac valve prosthesis in a kind of implant into body.

Background technology

The double-valve type artificial mechanical heart valve was come out more than 20 year in the world at present, bilobed flap compares with other mechanical prosthetic valve that to have a pressure gradient little, flow resistance is little, the lobe leaf opens and closes flexibly, impulsive force is little, effective area is big, and the hemodynamics performance that center blood flow, even flow field etc. are excellent is paid much attention in the world.

The structure of most bilobed flaps is basic identical in the world at present, in the endoporus both sides of ring-like lobe seat one symmetric platform is arranged respectively, the fan-shaped cradle head of " 8 " word that respectively has two symmetries to tilt on the platform, the auricular lappet axle of two lobe leaves is contained in two respectively in the fan-shaped axle of " 8 " word nest, and the turning cylinder that fan-shaped axle nest is the lobe leaf is again the spacing shelves that the lobe leaf opens and closes.By clinical observation for many years, the ratio of the patients clinical generation thromboembolism of discovery use bilobed flap is identical with single leaf lobe, and reason is that the segmental axle of " 8 " word nest has the dead angle, and blood flow washes away not thorough, easily generates thrombosis and comes off.And bibliographical information is arranged recently, the bilobed flap that used before 20 years has now begun to occur mechanical breakdowns such as film flying, reason is that the auricular lappet axle of two lobe leaves is in the fan-shaped axle of " 8 " word nest, along with heartthrob twists repeatedly, the suffered torsion of the auricular lappet axle of lobe leaf is very big, and the auricular lappet axle of lobe leaf ruptures because of tired.

Summary of the invention

The purpose of this utility model is to solve above-mentioned prior art problem and a kind of fatigue crack-resistant is provided, and it is little to backflow, the pestle mortar formula cradle head bilobate Cardiac valve prosthesis that antithrombotic is strong.

The technical solution adopted in the utility model: a kind of pestle mortar formula cradle head bilobate Cardiac valve prosthesis, comprise a lobe ring, two semicircle lobe leaves, a suture ring that connects firmly at lobe ring outer wall groove, the facet top, both sides that it is characterized in that two lobe leaf major axis respectively is provided with the raised or sunken lobe ring that is installed on of two ear shapes and goes in the spherical axis nest or protruding hemisphere of plane of flow both sides, the upper positive stop crosspiece of two facets and lobe ring, the lower positive stop crosspiece contact, the side that goes out to flow of two spherical axis nests or protruding hemisphere center is provided with " arrow " shape boss, the closed step that the inboard formation of the tip of " arrow " shape boss and spherical axis nest or protruding hemisphere and lobe ring lobe leaf is closed.The lobe ring upper positive stop crosspiece that planar two outside boss are opened for the lobe leaf that becomes a mandarin, the both sides of " arrow " shape boss are the lower positive stop crosspiece that the lobe leaf is opened.The lobe ring can be that both ends of the surface are planar structure, also can be that an end face is the plane, and the other end is the arc convex saddle peak structure of two correspondences.Lobe ring inboard respectively is provided with a symmetrical platform, and two platform tops respectively are provided with one and go into plane of flow.Lobe leaf arcwall face and relative straight shape face are the inclined-plane of 30 ° of corresponding tilt α.

The positive beneficial effect that this utility model had:

1. the cradle head of lobe leaf and spacing shelves branch are arranged, and spacing shelves are divided into two up and down, and lobe leaf turning cylinder is not disturbed by torsion, can not rupture because of tired, and the fatigue crack-resistant performance is good;

2. the spherical axis nest of lobe ring or protruding hemisphere, no dead angle, blood flow washes away thoroughly, is difficult for forming thrombosis, and antithrombotic is strong;

3. when the lobe leaf was closed, the facet of lobe leaf both sides contacted with closed step, had not only reduced to backflow but also " cavitation erosion (hole) " effect that " bubbles of vacuum " that the blood that reduces the viscosity aerated fluid produces by narrow slit produced lobe ring and lobe leaf;

4. low lobe frame prevents the card lobe, and it is little to backflow;

5. simple in structure, reasonable in design, noise is low, can be widely used in cardiac valve replacement, replaces because the pathological changes valve due to the various causes of disease.

Description of drawings

Fig. 1 is this utility model embodiment 1 structural representation;

Fig. 2 is this utility model lobe impeller structure front view;

Fig. 3 is this utility model lobe impeller structure right view;

Fig. 4 is this utility model embodiment 1 lobe ring structure half sectional view;

Fig. 5 is an A-A cutaway view among Fig. 4;

Fig. 6 is this utility model embodiment 1 another lobe ring structure half sectional view;

Fig. 7 is a B-B cutaway view among Fig. 6;

Fig. 8 is this utility model embodiment 2 lobe ring structure half sectional views;

Fig. 9 is a C-C cutaway view among Fig. 8;

Figure 10 is this utility model embodiment 2 another lobe ring structure half sectional views;

Figure 11 is a D-D cutaway view among Figure 10.

The specific embodiment

Embodiment 1

Consult Fig. 1, Fig. 2, shown in Figure 3, a kind of pestle mortar formula cradle head bilobate Cardiac valve prosthesis, mainly be by a lobe ring 1, two semicircle lobe leaves 2, a formation such as auxiliary suture ring 3 grades, its lobe leaf 2 semicircular in shape platen surface, the following straight shape face 202 that the last arcwall face 201 of platen surface is relative with it is the inclined-plane 203 of 30 ° of corresponding tilt α, the both sides of lobe leaf 2 major axis are provided with symmetric parallel facet 204, on two facets 204 and the lobe ring 1, the lower positive stop crosspiece contact, the top of two facets 204 respectively is provided with the projection 205 of two ear shapes or caves in 206, two lobe leaves 2 are installed in lobe ring 1 spherical axis nest or the protruding hemisphere, and suture ring 3 is fixed in the annular groove of lobe ring 1.

Consult Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, the outer wall of its lobe ring 1 is provided with annular groove 109, the end face of lobe ring 1 one ends is plane 110, the end face of the other end is provided with the arc convex saddle peak 101 of two correspondences, 101 inboards, two arc convex saddle peaks respectively are provided with a symmetrical platform 103, two platforms, 103 middle parts respectively be provided with two symmetrical spherical axis nests 102 or protruding hemisphere 102 ', two platforms, 103 tops, symmetric diaxon nest 102 or protruding hemisphere 102 ' between the side that becomes a mandarin respectively be provided with one and go into plane of flow 104, go into two outsides of plane of flow 104, just spherical axis nest 102 or protruding hemisphere 102 ' upside respectively are provided with the upper positive stop crosspiece 105 that a boss is 2 unlatchings of lobe leaf, the side that goes out to flow of two spherical axis nests 102 or hemisphere 102 ' center is provided with " arrow " shape boss 106, boss 106 both sides are the lower positive stop crosspiece 107 that lobe leaf 2 is opened, the tip of " arrow " shape boss 106 and spherical axis nest 102 or protruding hemisphere 102 ' and the lobe ring 1 inboard formation lobe leaf 2 closed step 108 of closing.

Constitute cradle head structure after the improvement by above-mentioned novel lobe ring 1, lobe leaf 2.

Embodiment 2

Consult Fig. 8, Fig. 9, Figure 10, shown in Figure 11, lobe ring 1 of the present utility model also can be that the end face at two ends is plane 110.All the other structures are seldom given unnecessary details at this with embodiment 1.

Operation principle of the present utility model: Cardiac valve prosthesis is according to the one-way cock principle, one side is the side that becomes a mandarin, another side is for going out to flow side, with the Bicuspid valve is example: when the heart diastole, the blood in room, a left side pours in from the valvular side that becomes a mandarin, lobe leaf 2 is with spherical axis nest 102 or protruding hemisphere 102 ' serve as an axle rotating opening, and lobe leaf 2 touches to be opened upper positive stop crosspiece 105 and lower positive stop crosspiece 107 and brake, and lobe leaf 2 is limited in 83-87 ° (is the plane with lobe ring 1) when opening; When heart shrinks, lobe leaf 2 is closed, the intrados of the arc shaped surface 201 contact lobe rings 1 of two semicircles, the straight shape face 202 of two lobe leaves 2 contacts, and the platen surface of lobe leaf 2 touches the tip of " arrow " shape boss 106 and spherical axis nest 102 or protruding hemisphere 102 ' and lobe ring 1 inboard closed step 108 that constitutes and braking.

Claims

1. pestle mortar formula cradle head bilobate Cardiac valve prosthesis, comprise a lobe ring, two semicircle lobe leaves, a suture ring that connects firmly at lobe ring outer wall groove, both sides facet (204) top that it is characterized in that two lobe leaves (2) major axis respectively is provided with the projection (205) of two ear shapes or depression (206) and is installed on lobe ring (1) and goes in the spherical axis nest (102) or protruding hemisphere (102 ') of plane of flow (104) both sides, the upper positive stop crosspiece (105) of two facets (204) and lobe ring (1), lower positive stop crosspiece (107) contact, the side that goes out to flow of two spherical axis nests (102) or protruding hemisphere (102 ') center is provided with " arrow " shape boss (106), the closed step (108) that the tip of " arrow " shape boss (106) and spherical axis nest (102) or protruding hemisphere (102 ') and lobe ring (1) inboard formation lobe leaf (2) is closed.

2. pestle mortar formula cradle head bilobate Cardiac valve prosthesis according to claim 1, it is characterized in that it is the upper positive stop crosspiece (105) that lobe leaf (2) is opened that lobe ring (1) is gone into two outside boss of plane of flow (104), the both sides of " arrow " shape boss (106) are the lower positive stop crosspiece (107) that lobe leaf (2) is opened.

3. pestle mortar formula cradle head bilobate Cardiac valve prosthesis according to claim 1, it is characterized in that lobe ring (1) can be that both ends of the surface are plane (110) structure, also can be that an end face is plane (110), the other end be arc convex saddle peak (101) structure of two correspondences.

4. according to claim 1 or 2 or 3 described pestle mortar formula cradle head bilobate Cardiac valve prosthesiss, it is characterized in that lobe ring (1) inboard respectively is provided with a symmetrical platform (103), two platforms (103) top respectively is provided with one and goes into plane of flow (104).

5. pestle mortar formula cradle head bilobate Cardiac valve prosthesis according to claim 1 is characterized in that lobe leaf (2) arcwall face (201) and relative straight shape face (202) are the inclined-plane (203) of 30 ° of corresponding tilt.