Artificial heart valve
First Claim
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1. An artificial valve for the replacement of an aortic or mitral heart valve, comprising:
- an annular body for installation into a valve flap ring of an aortic or mitral heart valve, said annular body including, at its outer circumference, means for mounting by surgical procedures and defining in its interior a blood flow passage, flap elements which are pivotally supported in said blood flow passage by pivot support structures and which, depending on their pivot positions, open or close said blood flow passage, said annular body including circumferentially spaced projections extending inwardly into said flow passage toward the center area of said blood flow passage, said spaced projections being provided at their inwardly extending ends with pivot joints on which said flap elements are pivotally supported, about a pivot axis extending through the pivot joints such that the cross-section covered by the outer part of each valve flap between the pivot axis and the annular body is larger than the flow cross-section covered by the flap in the center area of the annular body, whereby the outer valve parts adjacent the annular body are opened by the flow of blood through the valve in the direction of the blood flow and the inner valve flap parts projecting from the pivot axis into the center of the annular body are opened against the flow of the blood through the valve.
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Abstract
In an artificial heart valve for the replacement of an aortic or a mitral valve, including an annular body, which is provided at its outer circumference with means for mounting the artificial valve in place by surgical procedures and which defines in its interior a blood flow passage in which valve flap elements are pivotally supported so as to open or close the blood flow passage depending on their pivot positions, the annular body includes circumferentially spaced projections extending into the flow passage and being provided at their inner ends with pivot joints on which the valve flap elements are pivotally supported.
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Citations
16 Claims
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1. An artificial valve for the replacement of an aortic or mitral heart valve, comprising:
- an annular body for installation into a valve flap ring of an aortic or mitral heart valve, said annular body including, at its outer circumference, means for mounting by surgical procedures and defining in its interior a blood flow passage, flap elements which are pivotally supported in said blood flow passage by pivot support structures and which, depending on their pivot positions, open or close said blood flow passage, said annular body including circumferentially spaced projections extending inwardly into said flow passage toward the center area of said blood flow passage, said spaced projections being provided at their inwardly extending ends with pivot joints on which said flap elements are pivotally supported, about a pivot axis extending through the pivot joints such that the cross-section covered by the outer part of each valve flap between the pivot axis and the annular body is larger than the flow cross-section covered by the flap in the center area of the annular body, whereby the outer valve parts adjacent the annular body are opened by the flow of blood through the valve in the direction of the blood flow and the inner valve flap parts projecting from the pivot axis into the center of the annular body are opened against the flow of the blood through the valve.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An artificial valve for the replacement of an aortic or mitral heart valve, comprising:
- an annular body for installation into a valve flap ring of an aortic or mitral heart valve, said annular body including, at its outer circumference, means for mounting by surgical procedures and defining in its interior a blood flow passage, flap elements which are pivotally supported in said blood flow passage by pivot support structures and which, depending on their pivot positions, open or close said blood flow passage, said annular body including circumferentially spaced projections extending inwardly into said flow passage toward the center area of said blood flow passage, said spaced projections being provided at their inwardly extending ends with pivot joints on which said flap elements are pivotally supported, said projections being provided at their inwardly projecting ends with spaced webs extending further inwardly from said circumferentially spaced projections and being oriented in the flow direction of the blood through said passage and engaging said flaps so as to form said pivot support structure.
- View Dependent Claims (11)
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12. An artificial valve for the replacement of an aortic or mitral heart valve, comprising:
- an annular body for installation into a valve flap ring of an aortic or mitral heart valve, said annular body including, at its outer circumference, means for mounting by surgical procedures and defining in its interior a blood flow passage, flap elements which are pivotally supported in said blood flow passage by pivot support structures and which, depending on their pivot positions, open or close said blood flow passage, said annular body including circumferentially spaced projections extending inwardly into said flow passage toward the center area of said blood flow passage, said spaced projections being provided at their inwardly extending ends with pivot joints on which said flap elements are pivotally supported, said valve including three flap elements so that, in the open position of said valve, four flow passages are provided, one central and three circumferential passages, between the projections and the respective valve elements, the location of the valve pivot axis and the form of the valve ring being so selected that all four blood flow passages have about the same flow cross-section.
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13. An artificial valve for the replacement of an aortic or mitral heart valve, comprising:
- an annular body for installation into a valve flap ring of an aortic or mitral heart valve, said annular body including, at its outer circumference, means for mounting by surgical procedures and defining in its interior a blood flow passage, flap elements which are pivotally supported in said blood flow passage by pivot support structures and which, depending on their pivot positions, open or close said blood flow passage, said annular body including circumferentially spaced projections extending inwardly into said flow passage toward the center area of said blood flow passage, said spaced projections being provided at their inwardly extending ends with pivot joints on which said flap elements are pivotally supported, the interior flow passage through said annular body having a cross-section which decreases from the upstream end thereof toward said projections and then again increases from the area of said projections toward the downstream end of said passage.
- View Dependent Claims (14, 15, 16)
Specification