Heart valve prosthesis
The prosthesis comprises an annular frame and a disc-shaped obturator which is coupled to the frame and is pivotable, under the action of the blood flow, between an open annular position and a closed angular position, so as to allow the flow of blood through the aperture of the annular frame in one...
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| creator | VALLANA FRANCO BONA GIOACHINO |
| description | The prosthesis comprises an annular frame and a disc-shaped obturator which is coupled to the frame and is pivotable, under the action of the blood flow, between an open annular position and a closed angular position, so as to allow the flow of blood through the aperture of the annular frame in one direction and the interruption of the flow in the opposite direction, respectively. The obturator is coupled to the frame in such a way that, in the open position, it may orient itself in a direction substantially perpendicular to the plane of the frame. The side of the obturator which faces away from the central axis of the annular frame in the open angular position is defined, at least in its peripheral part, by a surface which is generated by the rotation, about the central axis of the obturator, of a curve the locus of the centers of curvature of which lies on the opposite side of this curve from a curve which generates, by rotation around the central axis, a surface defining the other side of the obturator. |
| format | Patent |
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The obturator is coupled to the frame in such a way that, in the open position, it may orient itself in a direction substantially perpendicular to the plane of the frame. The side of the obturator which faces away from the central axis of the annular frame in the open angular position is defined, at least in its peripheral part, by a surface which is generated by the rotation, about the central axis of the obturator, of a curve the locus of the centers of curvature of which lies on the opposite side of this curve from a curve which generates, by rotation around the central axis, a surface defining the other side of the obturator.</description><language>eng</language><subject>BANDAGES, DRESSINGS OR ABSORBENT PADS ; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS ; FILTERS IMPLANTABLE INTO BLOOD VESSELS ; FIRST-AID KITS ; FOMENTATION ; HUMAN NECESSITIES ; HYGIENE ; MEDICAL OR VETERINARY SCIENCE ; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES ; PROSTHESES ; TREATMENT OR PROTECTION OF EYES OR EARS</subject><creationdate>1984</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840103&DB=EPODOC&CC=US&NR=4423525A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25547,76298</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840103&DB=EPODOC&CC=US&NR=4423525A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>VALLANA; FRANCO</creatorcontrib><creatorcontrib>BONA; GIOACHINO</creatorcontrib><title>Heart valve prosthesis</title><description>The prosthesis comprises an annular frame and a disc-shaped obturator which is coupled to the frame and is pivotable, under the action of the blood flow, between an open annular position and a closed angular position, so as to allow the flow of blood through the aperture of the annular frame in one direction and the interruption of the flow in the opposite direction, respectively. The obturator is coupled to the frame in such a way that, in the open position, it may orient itself in a direction substantially perpendicular to the plane of the frame. The side of the obturator which faces away from the central axis of the annular frame in the open angular position is defined, at least in its peripheral part, by a surface which is generated by the rotation, about the central axis of the obturator, of a curve the locus of the centers of curvature of which lies on the opposite side of this curve from a curve which generates, by rotation around the central axis, a surface defining the other side of the obturator.</description><subject>BANDAGES, DRESSINGS OR ABSORBENT PADS</subject><subject>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</subject><subject>FILTERS IMPLANTABLE INTO BLOOD VESSELS</subject><subject>FIRST-AID KITS</subject><subject>FOMENTATION</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</subject><subject>PROSTHESES</subject><subject>TREATMENT OR PROTECTION OF EYES OR EARS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1984</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBDzSE0sKlEoS8wpS1UoKMovLslILc4s5mFgTUvMKU7lhdLcDPJuriHOHrqpBfnxqcUFicmpeakl8aHBJiZGxqZGpo7GhFUAAC9sIP8</recordid><startdate>19840103</startdate><enddate>19840103</enddate><creator>VALLANA; FRANCO</creator><creator>BONA; GIOACHINO</creator><scope>EVB</scope></search><sort><creationdate>19840103</creationdate><title>Heart valve prosthesis</title><author>VALLANA; FRANCO ; BONA; GIOACHINO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US4423525A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1984</creationdate><topic>BANDAGES, DRESSINGS OR ABSORBENT PADS</topic><topic>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</topic><topic>FILTERS IMPLANTABLE INTO BLOOD VESSELS</topic><topic>FIRST-AID KITS</topic><topic>FOMENTATION</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</topic><topic>PROSTHESES</topic><topic>TREATMENT OR PROTECTION OF EYES OR EARS</topic><toplevel>online_resources</toplevel><creatorcontrib>VALLANA; FRANCO</creatorcontrib><creatorcontrib>BONA; GIOACHINO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>VALLANA; FRANCO</au><au>BONA; GIOACHINO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Heart valve prosthesis</title><date>1984-01-03</date><risdate>1984</risdate><abstract>The prosthesis comprises an annular frame and a disc-shaped obturator which is coupled to the frame and is pivotable, under the action of the blood flow, between an open annular position and a closed angular position, so as to allow the flow of blood through the aperture of the annular frame in one direction and the interruption of the flow in the opposite direction, respectively. The obturator is coupled to the frame in such a way that, in the open position, it may orient itself in a direction substantially perpendicular to the plane of the frame. The side of the obturator which faces away from the central axis of the annular frame in the open angular position is defined, at least in its peripheral part, by a surface which is generated by the rotation, about the central axis of the obturator, of a curve the locus of the centers of curvature of which lies on the opposite side of this curve from a curve which generates, by rotation around the central axis, a surface defining the other side of the obturator.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BANDAGES, DRESSINGS OR ABSORBENT PADS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROSTHESES TREATMENT OR PROTECTION OF EYES OR EARS |
| title | Heart valve prosthesis |
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