Method for producing an aortic or mitral heart valve prosthesis and resulting aortic or mitral heart valve
A method for producing an aortic or mitral heart valve prosthesis and the resulting aortic or mitral heart valve. The method is characterized in that it essentially consists in producing the prosthesis by shaping a textile material. The invention is more particularly applicable in the field of medicine, in particular repair surgery, and especially in heart surgery, more particularly heart prostheses.
1. A process for the production of an aortic or mitral cardiac valve prosthesis, comprising:
shaping flaps ( 2 ) by pressing an edge zone of a textile membrane against a counter-form by applying suction of a first fluid through said counter-form so that the flaps are formed with shapes corresponding to a structure of said counter-form; and
thermofixing the flaps obtained in said shaping step by drawing a second fluid through the textile membrane into the counter-form, the second fluid being sufficiently hot to thermofix the textile membrane,
wherein said thermofixing step follows said shaping step, and
wherein the textile membrane is of the type formed by an assembly mode selected from the group consisting of i) woven, ii) non-woven in the form of assembled fibers, and iii) non-woven obtained by autofibrillation of a membrane by drawing and knitting.
2. The process according to claim 1 ,
wherein the first fluid of said shaping step is a liquid heat exchange fluid, and
wherein the first fluid is projected at a pressure against the edge zone of the textile membrane to press the textile member against the counter-form such that the textile member matches the counter-form.
3. The process according to claim 1 , wherein the second fluid is air or gas.
4. The process according to claim 1 , wherein the textile membrane is in the form of a tubular element.
5. The process according to claim 1 , wherein the shaping step further includes a slight preliminary mechanical deformation of the edge zone in a direction of the counter-form.
6. The process according to claim 5 , wherein the slight preliminary mechanical deformation is effected by a die moving the portion of membranes in a direction of corresponding recesses of the counter-form.
7. The process according to claim 1 ,
wherein the first fluid, in the shaping step, presses the edge zone against the counter-form.
8. A process for the production of an aortic or mitral cardiac valve prosthesis, comprising:
shaping flaps of the valve prosthesis by pressing an edge zone of a textile membrane against a counter-form by applying suction of a first fluid through said counter-form so that the flaps are formed with shapes corresponding to a structure of said counter-form; and
thermofixing the flaps obtained in said shaping step by drawing a hot second fluid through the textile membrane into the counter-form, said thermofixing step following said shaping step, and
wherein the textile membrane is of the type formed by an assembly mode selected from the group consisting of i) woven, ii) non-woven in the form of assembled fibers, and iii) non-woven obtained by autofibrillation of a membrane by drawing and knitting.
9. The process according to claim 8 ,
wherein the first fluid in said shaping step is a liquid, and
wherein the liquid first fluid is projected at a pressure against the edge zone of the textile membrane to press the textile member against the counter-form such that the textile member matches the counter-form.
10. The process according to claim 8 , wherein the second fluid is air or gas.
11. The process according to claim 8 , wherein the textile membrane is in the form of a tubular element.