公开(公告)号：DE69220572D1

公开(公告)日：1997-07-31

申请号：DE69220572

申请日：1992-04-23

Applicant: BAXTER INT

Inventor： NGUYEN THAN ,  NASHEF AWS ,  ABOLFATHI AMIR ,  WIETING DAVID ,  LEE DENIS

IPC: A61B17/00 ,  A61F2/24

Abstract: A method and device for testing artificial or natural venous valves. The device comprises chamber (10) a sample for mounting a test valve (V) on a liquid flow path and a muscle pump component (16) and/or respiratory pump component (50) and/or capacitance reservoir (58) and/or vertical hydrostatic column component (102) fluidly connected to the flow path to mimic the muscle pump, respiratory pump, capacitance and hydrostatic impedance effects on venous circulation in the mammalian body. Included in the invention are methods of testing venous valves by mimicking known hemodynamic flow conditions within a mammalian body.

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.

公开(公告)号：DE69220572T2

公开(公告)日：1998-02-12

申请号：DE69220572

申请日：1992-04-23

Applicant: BAXTER INT

Inventor： NGUYEN THAN ,  NASHEF AWS ,  ABOLFATHI AMIR ,  WIETING DAVID ,  LEE DENIS

IPC: A61B17/00 ,  A61F2/24

Abstract: A method and device for testing artificial or natural venous valves. The device comprises chamber (10) a sample for mounting a test valve (V) on a liquid flow path and a muscle pump component (16) and/or respiratory pump component (50) and/or capacitance reservoir (58) and/or vertical hydrostatic column component (102) fluidly connected to the flow path to mimic the muscle pump, respiratory pump, capacitance and hydrostatic impedance effects on venous circulation in the mammalian body. Included in the invention are methods of testing venous valves by mimicking known hemodynamic flow conditions within a mammalian body.

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.