CN1799520A - Percutaneous aortic valve replacement device - Google Patents

Abstract

The invention provides a new percutaneous aortic valve replacing device which is characterized by the rational designation, convenient usage and low operational danger, which is to solve problems of inconvenient stitching of valve and cradle and high danger of using saccule to expand aortic valve in current aortic valve replacing device, the device is an automatic buckling cradle carrying biological valve, comprising cradle in nickel-tantalum alloy framework and trilobular one-way opening valve composed of pig heart bag. The nickel-tantalum alloy possesses functions of fixing and supporting, the trilobular valve is fixed tightly in the cradle. The product is characterized by the small injury, high safety, reduced complication caused by aortic valve replacement, and wide application prospect.

Description

Percutaneous aortic valve replacement device

Technical field

The present invention relates to a kind of medical apparatus and instruments, need not operating on that especially a kind of division of cardiology uses can be carried out the prosthetic aortic valve that aortic valve is replaced, specifically a kind of percutaneous aortic valve replacement device.

Background technology

From nineteen sixty Starr and Harken respectively the using artificial valve replaced for patient since Bicuspid valve and aortic valve succeed, the surgery valve replacement surgery is as the most effectual way of serious valvular heart disease treatment, and be that the above patient of 100,000 examples carries out valve replacement surgery every year.The artificial valve is divided into bioprosthetic valve and mechanical prosthetic valve two big classes, kind more than 100, clinical use respectively has pluses and minuses, and most artificial valve replacement operation all carries out under the support of body pulmonary circulation machine, and the complicated first heart of infant and the old valve patient's of serious symptom artificial valve replacement operation is restricted.Over nearly 5 years, constantly there is new artificial valve to emerge in large numbers, make artificial valve's replacement operation begin need not the support of body pulmonary circulation, particularly through the successful Application of conduit prosthetic valve replacement, for the treatment of valvular heart disease has increased new tool at animal and special case.

Age surpasses among 65 years old old people, because the aortic stenosis incidence rate due to the aortic valve calcification reaches 2%～7%, and ratio is more and more higher with age.Serious aortic stenosis patient left heart function is badly damaged, and patient descends quality of life and life span obviously shortens, and must effectively treat.Up to now, the serious aortic valve patient of surgical operation indication is arranged, surgery aortic valve prosthesis replacement (no matter selecting mechanical prosthetic valve or bioprosthetic valve for use) remains first-selected treatment.Percutaneous sacculus aortic valve plasty, because in the art, the severe postoperative complication comprises: death, apoplexy, aortic rupture, the serious incompetence of aortic valve and aortic valve restenosis incidence rate height in a short time, not as the serious Therapeutic Method of aortic stenosis.The elderly patients of serious aortic stenosis or incompetence, during no surgical operation indication, clinical treatment is very difficult.Become the another selection of above-mentioned patient through conduit aortic valve prosthesis replacement.

2002, Philipp Bonhoeffer reported the animal test results through conduit aortic valve prosthesis replacement.He utilizes diameter to tear the sheep aortic valve for 10mm or 18mm balloon expandable, produces moderate and severe aortic incompetence.Stent valve is made up of three parts: 1. outer self-inflated nick-eltitanium alloy stent: weave into diameter 25mm blank pipe shape structure by nitinol alloy wire, on nearly aorta limit 3 equally distributed projections are arranged, play fixedly aortic valve; 2. internal layer balloon expandable platinumiridio support and 3. bioprosthetic valve.Outer support and internal layer support are all sewed up except that projection and are close to.Band lobe bovine jugular vein is cut off corresponding breach in the venous valve upper part, and avoiding stent valve to insert the back influences coronary flow.

2002, Alain Cribier is carrying out on a large amount of zooperal bases, be that 57 years old serious aortic stenosis patient of 1 example has carried out the replacement through the conduit aortic valve prosthesis first, to 2004, be again that 8 examples are that the patient of the severe aortic stenosis of 82.6 years old (77～88 years old) has carried out valve replacement surgery the mean aves.EDWARDS company in 2004 suspended a drugs approved by FDA through conduit aortic valve prosthesis replacement operation because direct motion method complication rate in art of previous application was higher than retrograde method, require to increase the method for driving in the wrong direction displacement aortic valve.

In sum, existing percutaneous aortic valve replacement device has the following disadvantages: the calcification problem of biovalve is not resolved; The stitching of valve and support is complete inadequately in the valve system; Induction system is required high; Need expand aortic valve in advance with sacculus, there are a series of problems such as the complex structure manufacture difficulty is big in addition in the operation risk height.

Summary of the invention

To such an extent as to the objective of the invention is the valve that exists at existing percutaneous aortic valve replacement device and support sew up inconvenience be difficult to sew up fully and perform the operation in need expand aortic valve in advance with sacculus and have the high problem of operation risk, design a kind of rational in infrastructure, easy to use, the novel percutaneous aortic valve replacement device that operation risk is little.

Technical scheme of the present invention is:

A kind of percutaneous aortic valve replacement device, comprise thelatticed support 1 that forms by the nitinol alloy wire braiding,SANYE valve 2,SANYE valve 2 is by being fixed in thesupport 1 with thesupport 1 circumferential film 3 that links to each other, it is characterized in that describedsupport 1 is by mutual perforation, the aortic stents 6 of Xiang Lianing successively, valve bracket 5, left ventricular outflow tract support 4, one end of aortic stents 6 is for ease of the no bottom structure to the aorta blood supply, its other end links to each other with an end of valve bracket 5, the other end of valve bracket 5 links to each other with an end of left ventricular outflow tract support 4, the other end of left ventricular outflow tract support 4 is one to be convenient to the no bottom structure that the left ventricular blood liquid stream is gone into, the diameter of the no bottom structure end of described aortic stents 6 is greater than the no bottom structure end of left ventricular outflow tract support 4 and the diameter of valve bracket 5, film 3 is fixed on the inwall of valve bracket 5, andSANYE valve 2 links to each other with film 3 and is positioned in the valve bracket 5.

Described film 3 is a poly tetrafluoroethylene, and it links to each other with valve bracket 5 andSANYE valve 2 respectively by medical suture.

DescribedSANYE valve 2 is made by the unidirectional open valve of forming through the Cor Sus domestica bag of anti-calcification processing of SANYE and is formed.

The diameter of described aortic stents 6 is greater than by 10%～20% of displacer aorta diameter.

The present invention has the following advantages:

1, need not external cardiorespiratory system just can finish the displacement of aortic valve; The induction system of 14F; The self-expanding function without sacculus, has been avoided the interruption of aortic flow; Blood flow coronarius is guaranteed; The calcification speed of valve reduces, and the life-span prolongs.

2, use aortic valve replacement device of the present invention under the situation of not opening breast, to adopt transcatheter method that the aortic valve replacement device is implanted to the aortic valve position, reduce operation misery and risk, for patient reduces medical expense.

3, support of the present invention and valve are linear when being subjected to the external force tractive, and valve system is injury-free behind the shape that resiles, and this characteristics make it easy to operate, are the metathetical prerequisites of percutaneous.

4, nick-eltitanium alloy stent designs according to left ventricular outflow tract, aortal shape, after discharging, device can combine closely with left ventricular outflow tract, aorta, guaranteeing that percutaneous aortic valve replacement device can be stablized is placed on left ventricular outflow tract and aorta, do not damage left ventricular outflow tract and aorta again, the aorta inner support partly plays main fixedly percutaneous aortic valve replacement device, and valve bracket has guaranteed that support does not bounce back and do not have perivalvular leakage.

5, SANYE valve of the present invention has the function of one-way cock, can guarantee that blood is open at the left ventricle systole, and close at relaxing period, recovers the function of aortic valve.

6, the Cor Sus domestica bag of making the SANYE valve is through anti-calcification processing, and it is after implanting, and calcification is obviously slowed down, and obviously prolong its service life.

7, in aortic stents, do not cover inner membrance, effectively guaranteed blood supply coronarius.

8, the present invention can put into the induction system use of 14F level, and the self-expanding function is arranged, and can recover the function of external shape after discharging outside transmitting sheath.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the vertical view of this Fig. 1.

The specific embodiment

The present invention is further illustrated for following structure drawings and Examples.

As shown in Figure 1, 2.

A kind of percutaneous aortic valve replacement device, comprise thelatticed support 1 that forms by the nitinol alloy wire braiding,SANYE valve 2,SANYE valve 2 is made by the unidirectional open valve of forming through the Cor Sus domestica bag of anti-calcification processing of SANYE and is formed, it is by being fixed in thesupport 1 with thesupport 1 circumferential poly tetrafluoroethylene 3 that links to each other,support 1 is by mutual perforation, the aortic stents 6 of Xiang Lianing successively, valve bracket 5, left ventricular outflow tract support 4, one end of aortic stents 6 is for ease of the no bottom structure to the aorta blood supply, its other end links to each other with an end of valve bracket 5, the other end of valve bracket 5 links to each other with an end of left ventricular outflow tract support 4, the other end of left ventricular outflow tract support 4 is one to be convenient to the no bottom structure that the left ventricular blood liquid stream is gone into, the diameter of the no bottom structure end of described aortic stents 6 is greater than the no bottom structure end of left ventricular outflow tract support 4 and the diameter of valve bracket 5, poly tetrafluoroethylene 3 is fixed on the inwall of valve bracket 5,SANYE valve 2 links to each other with poly tetrafluoroethylene 3 and is positioned in the valve bracket 5, and poly tetrafluoroethylene 3 links to each other with valve bracket 5 andSANYE valve 2 respectively by medical suture.

Percutaneous aortic valve replacement device of the present invention has good shape memory function, is linear when being subjected to the external force tractive, and external force is recovered original-shape after removing immediately.

Support 1 of the present invention is formed by certain route braiding on mould by nitinol alloy wire, puts into special mould, through the control treatment temperature, can reach needed super-elasticity and memory function.

Cor Sus domestica bag SANYEvalve 2 among the present invention, before stitching, pass through anti-calcification processing, calcification speed obviously descends in its body, prolong physiological longevity,SANYE valve 2 is sewed up with poly tetrafluoroethylene 3, and then poly tetrafluoroethylene 3 sewed up mutually with valve bracket 5,SANYE valve 2 can be firmly and support combine closely.

When the present invention used, whole intervention procedure carried out under the guiding of transesophageal echocardiography, and radiography is estimated the size and the aorta diameter of left ventricular outflow tract, aortic valvular ring, selected people's percutaneous aortic valve replacement device of suitable size.After cutting femoral artery,, it is expanded, reach the purpose of displacement aortic valve in the release of the position of aortic valve along special induction system shipper percutaneous aortic valve replacement device.The aortic root radiography, evaluation has or not aortic regurgitation.

In zoopery and clinical practice, can select the size of percutaneous aortic valve replacement device according to ventriculography of left ventricle in transesophageal echocardiography inspection and the art.Usually selection percutaneous aortic valve replacement device diameter should be bigger by 10%～20% than aorta diameter.Reach once more the radiography result according to the esophagus ultrasound kinetocardiogram and determine percutaneous aortic valve replacement device implantation position and effect.

The present invention is further illustrated below in conjunction with concrete zoopery.

Test situation is as follows:

5 male miniature pigs, body weight 23-28kg, average 24.6kg.

Whole intervention procedure carries out under X line perspective, under the guiding of transesophageal echocardiography.The laboratory animal dorsal position is fixed in catheter bed.Patients Under Ketamine Anesthesia connects respirator, electrocardiograph after the tracheal intubation.The right femoral artery puncture, import the 14F arterial sheath, left lateral position 90 degree ventriculography of left ventricle, understand left ventricular outflow tract and aortal internal diameter, selection is than the percutaneous aortic valve replacement device of the big 10%-20% diameter of Ad, send into percutaneous aortic valve replacement device through special induction system, discharge percutaneous aortic valve replacement device in the position of aortic valve and make its self-expanding.The aortic root radiography is estimated anti-stream and the blood flow coronarius have or not aortic valve, confirms not have the anti-stream of aortic valve and coronary flow surgeon's knot bundle just often.

Experimental result: 5 animals, except that 1 because of the too much death of intraoperative hemorrhage, all the other 4 survive.Put todeath 1 respectively in 2 weeks of postoperative, 4 weeks, 8 weeks, the execution echocardiography that moves ahead, the aortic valve blood flow is normal, the anti-stream that does not have aortic valve is put to death the back gross examination of skeletal muscle, and all the percutaneous aortic valve replacement device position is good, do not see displacement, perusal percutaneous aortic valve replacement device surface and around do not have thrombosis, percutaneous aortic valve replacement device surface about 80% is covered by endothelium during 4 weeks, the percutaneous aortic valve replacement device surface is almost completely covered by endothelium during 8 weeks.

Claims (4)

1, a kind of percutaneous aortic valve replacement device, comprise the latticed support (1) that forms by the nitinol alloy wire braiding, SANYE valve (2), SANYE valve (2) is by being fixed in the support (1) with film (3) that support (1) circumferentially links to each other, it is characterized in that described support (1) is by mutual perforation, the aortic stents of Xiang Lianing (6) successively, valve bracket (5), left ventricular outflow tract support (4), one end of aortic stents (6) is for ease of the no bottom structure to the aorta blood supply, its other end links to each other with an end of valve bracket (5), the other end of valve bracket (5) links to each other with an end of left ventricular outflow tract support (4), the other end of left ventricular outflow tract support (4) is one to be convenient to the no bottom structure that the left ventricular blood liquid stream is gone into, the diameter of the no bottom structure end of described aortic stents (6) is greater than the no bottom structure end of left ventricular outflow tract support (4) and the diameter of valve bracket (5), film (3) is fixed on the inwall of valve bracket (5), and SANYE valve (2) links to each other with film (3) and is positioned in the valve bracket (5).

2, percutaneous aortic valve replacement device according to claim 1 is characterized in that described film (3) is a poly tetrafluoroethylene, and it links to each other with valve bracket (5) and SANYE valve (2) respectively by medical suture.

3, percutaneous aortic valve replacement device according to claim 1 is characterized in that described SANYE valve (2) is made by the unidirectional open valve of forming through the Cor Sus domestica bag of anti-calcification processing of SANYE to form.

4, percutaneous aortic valve replacement device according to claim 1, the diameter that it is characterized in that described aortic stents (6) is greater than by 10%～20% of displacer aorta diameter.

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