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公开(公告)号：DE69700302T2
公开(公告)日：2000-03-23
申请号：DE69700302
申请日：1997-01-02
Applicant: BAXTER INT
Inventor： LAM HUNG , DESERAN LISA , RHEE RICHARD
Abstract: An aortic valve sizing obturator apparatus for employment in determining the correct size of an aortic annulus. The apparatus includes a cylindrical obturator body with a flange member formed thereabout. At least the under surface of the flange member is of a non-planar, multi-curvate configuration to thereby be complimentary in shape to the annulus of an aortic valve when seated in the annulus during size determination. Within the cylindrical obturator body can be disposed a handle connector to which a handle can be attached during placement of the obturator apparatus within an annulus. The present invention also includes methodology for determining the size of an aortic valve annulus by employing a plurality of differently-sized aortic valve sizing obturators defined above and individually seating them sequentially within the aortic annulus until an obturator that reflects annulus size is located.
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公开(公告)号：AU2241497A
公开(公告)日：1997-08-01
申请号：AU2241497
申请日：1997-01-02
Applicant: BAXTER INT
Inventor： LAM HUNG , DESERAN LISA , RHEE RICHARD
Abstract: An aortic valve sizing obturator apparatus for employment in determining the correct size of an aortic annulus. The apparatus includes a cylindrical obturator body with a flange member formed thereabout. At least the under surface of the flange member is of a non-planar, multi-curvate configuration to thereby be complimentary in shape to the annulus of an aortic valve when seated in the annulus during size determination. Within the cylindrical obturator body can be disposed a handle connector to which a handle can be attached during placement of the obturator apparatus within an annulus. The present invention also includes methodology for determining the size of an aortic valve annulus by employing a plurality of differently-sized aortic valve sizing obturators defined above and individually seating them sequentially within the aortic annulus until an obturator that reflects annulus size is located.
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公开(公告)号：DE69010890T2
公开(公告)日：1995-03-16
申请号：DE69010890
申请日：1990-02-01
Applicant: BAXTER INT
Inventor： LAM HUNG , NGUYEN THAN , CARPENTIER ALAIN
Abstract: An annuloplasty ring prosthesis has a flexible, annular body including one or more defined lengths (16,30), which are more rigid than the remainder of the body. The flexible body increases in flexibility about its circumference in a direction away from the, or each rigid, defined length and is formed from a plurality of individual wire elements. The elements may be wire strands (14,24) secured in a bundle, positioned in respective lumens (26) of a multiple lumen enclosure (28), or may be layers (38) of one or more wire bands wrapped on one another.
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公开(公告)号：CA2297914C
公开(公告)日：2006-10-03
申请号：CA2297914
申请日：1998-07-22
Applicant: BAXTER INT
Inventor： CARPENTIER ALAIN , NGUYEN THAN , LAM HUNG , CARPENTIER ALEXANDRE , HUYNH VAN LE , CUNANAN CRYSTAL
Abstract: An expandable annuloplasty ring which may either expand spontaneously, in situ, as the patient grows or be expanded by surgical intervention by balloon dilatation. The distensible annuloplasty ring of the invention may be usable in pediatric patients whose growth, subsequent to surgical implantation of the ring, will necessitate subsequent enlargement of the ring to accommodate growth of the annulus. The ring may include relatively expandable segments to enable the enlargement thereof. The ring segments may include engaging teeth which cooperate with notches or slots formed in the tubes to provide some resistance to ring distention, while preventing collapse of the ring in the opposite direction. The teeth may be of different sizes or shapes to regulate the amount of force needed to expand the ring at different stages of the patient 's growth. Alternatively, the adjustable ring includes a solid core of non-elastic material which plastically retains its shape upon natura l expansion of the annulus, or after surgical expansion. In one embodiment, segments are coupled together with a discontinuity around the ri ng periphery. Pivot regions are provided between adjacent segments that, along with the discontinuity, enable the ring to expand upon annulus growth. The discontinuity may be positioned along the anterior side of the ring or around the posterior side. A further versio n makes use of telescoped segments with no discontinuity. The segments are coupled together with tubular sheaths, and expand without decoupling. A fabric covering may be omitted.
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公开(公告)号：AU8497498A
公开(公告)日：1999-02-16
申请号：AU8497498
申请日：1998-07-22
Applicant: BAXTER INT
Inventor： CARPENTIER ALEXANDRE , CARPENTIER ALAIN , LAM HUNG , NGUYEN THANH , HUYNH LE VAN , CUNANAN CRYSTAL
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Patent Agency Ranking
公开(公告)号：DE69110880T2
公开(公告)日：1995-12-21
申请号：DE69110880
申请日：1991-03-26
Applicant: BAXTER INT
Inventor： WIETING DAVID , NGUYEN THAN , STOBIE ROBERT , LAM HUNG , KAFESJIAN RALPH
IPC: A61F2/24
Abstract: A mechanical heart valve having one or more leaflets pivotally fitted in a substantially cylindrical shaped valve body formed from a resiliently deformable material. A stiffening member formed from substantially nonresilient material fit about the valve body exterior wall to provide structural integrity to the valve body. Stresses which are normally applied to the heart valve body during the opening and closing of the valve are absorbed or cushioned by the incorporation of a rubber-like body between the stiffening member and the retainer member. Further cushioning is provided by incorporating another rubber-like body in the sewing ring. This second body extends out from the exterior surface of the valve body. Finally, a length of fabric is positioned about the retainer and shock absorbing bodies. This design provides a precisely calibrated rotational torque which allows for optimum orientation of the leaflets by the implanting surgeon.
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公开(公告)号：CA2297914A1
公开(公告)日：1999-02-04
申请号：CA2297914
申请日：1998-07-22
Applicant: BAXTER INT
Inventor： CARPENTIER ALAIN , CARPENTIER ALEXANDRE , LAM HUNG , NGUYEN THANH , HUYNH VAN LE , CUNANAN CRYSTAL
Abstract: An expandable annuloplasty ring which may either expand spontaneously, in situ, as the patient grows or be expanded by surgical intervention by balloon dilatation. The distensible annuloplasty ring of the invention may be usable in pediatric patients whose growth, subsequent to surgical implantation of the ring, will necessitate subsequent enlargement of the ring to accommodate growth of the annulus. The ring may include relatively expandable segments to enable the enlargement thereof. The ring segments may include engaging teeth which cooperate with notches or slots formed in the tubes to provide some resistance to ring distention, while preventing collapse of the ring in the opposite direction. The teeth may be of different sizes or shapes to regulate the amount of force needed to expand the ring at different stages of the patient's growth. Alternatively, the adjustable ring includes a solid core of non-elastic material which plastically retains its shape upon natural expansion of the annulus, or after surgical expansion. In one embodiment, segments are coupled together with a discontinuity around the ring periphery. Pivot regions are provided between adjacent segments that, along with the discontinuity, enable the ring to expand upon annulus growth. The discontinuity may be positioned along the anterior side of the ring or around the posterior side. A further version makes use of telescoped segments with no discontinuity. The segments are coupled together with tubular sheaths, and expand without decoupling. A fabric covering may be omitted.
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公开(公告)号：DE69110880D1
公开(公告)日：1995-08-03
申请号：DE69110880
申请日：1991-03-26
Applicant: BAXTER INT
Inventor： WIETING DAVID , NGUYEN THAN , STOBIE ROBERT , LAM HUNG , KAFESJIAN RALPH
IPC: A61F2/24
Abstract: A mechanical heart valve having one or more leaflets pivotally fitted in a substantially cylindrical shaped valve body formed from a resiliently deformable material. A stiffening member formed from substantially nonresilient material fit about the valve body exterior wall to provide structural integrity to the valve body. Stresses which are normally applied to the heart valve body during the opening and closing of the valve are absorbed or cushioned by the incorporation of a rubber-like body between the stiffening member and the retainer member. Further cushioning is provided by incorporating another rubber-like body in the sewing ring. This second body extends out from the exterior surface of the valve body. Finally, a length of fabric is positioned about the retainer and shock absorbing bodies. This design provides a precisely calibrated rotational torque which allows for optimum orientation of the leaflets by the implanting surgeon.
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公开(公告)号：CA2241842C
公开(公告)日：2006-06-06
申请号：CA2241842
申请日：1997-01-02
Applicant: BAXTER INT
Inventor： LAM HUNG , RHEE RICHARD , DESERAN LISA
Abstract: An aortic valve sizing obturator apparatus for employment in determining the correct size of an aortic annulus. The apparatus includes a cylindrical obturator body with a flange member formed thereabout. At least the under surface of the flange member is of a non-planar, multi-curvate configuration to thereby be complementary in shape to the annulus of an aortic valve when seated in the annulus during size determination. Within the cylindrical obturator body can be disposed a handle connector to which a handle can be attached during placement of the obturator apparatus within an annulus. The present invention also includes methodology for determining the size of an aortic valve annulus by employing a plurality of differently-sized aortic valve sizing obturators defined above and individually seating them sequentially within the aortic annulus until an obturator that reflects annulus size is located.
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公开(公告)号：DE69700302D1
公开(公告)日：1999-08-05
申请号：DE69700302
申请日：1997-01-02
Applicant: BAXTER INT
Inventor： LAM HUNG , DESERAN LISA , RHEE RICHARD
Abstract: An aortic valve sizing obturator apparatus for employment in determining the correct size of an aortic annulus. The apparatus includes a cylindrical obturator body with a flange member formed thereabout. At least the under surface of the flange member is of a non-planar, multi-curvate configuration to thereby be complimentary in shape to the annulus of an aortic valve when seated in the annulus during size determination. Within the cylindrical obturator body can be disposed a handle connector to which a handle can be attached during placement of the obturator apparatus within an annulus. The present invention also includes methodology for determining the size of an aortic valve annulus by employing a plurality of differently-sized aortic valve sizing obturators defined above and individually seating them sequentially within the aortic annulus until an obturator that reflects annulus size is located.
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