摘要:
An apparatus for fluidly isolating a portion of a blood vessel wall from bloodflow at an anastomosis site within a blood vessel is described. An insertion catheter has longitudinally spaced proximal and distal catheter ends and an operative lumen extending therebetween, and is configured for insertion into the blood vessel at an insertion location spaced apart from the anastomosis site. An isolation device is attached to the distal catheter end, and includes a concave working surface bounded by an isolation rim and a bloodflow surface opposite the working surface. The isolation rim is configured to contact at least a portion of the blood vessel longitudinally aligned with, and radially spaced from, the anastomosis site. The bloodflow surface is in contact with bloodflow past the anastomosis site within the blood vessel when the isolation device engages the blood vessel wall. A retention means is attached to the isolation device and in fluid communication with the operative lumen. The retention means is configured to exert force on the blood vessel wall to at least partially engage the blood vessel wall with the isolation device. A method of fluidly isolating a portion of a blood vessel wall from bloodflow at an anastomosis site within a blood vessel is also provided.
摘要:
An annuloplasty ring for repairing a cardiac valve includes an expandable support member having oppositely disposed proximal and distal end portions and a main body portion between the end portions. The proximal end portion of the support member includes a plurality of wing members that extend from the main body portion. Each of the wing members includes at least one hook member for embedding into a cardiac wall and the valve annulus to secure the annuloplasty ring in the valve annulus. The annuloplasty ring may be expanded into full contact engagement with the annulus of the cardiac valve by an inflatable balloon. Methods for repairing a cardiac valve using the annuloplasty ring are also provided.
摘要:
An apparatus is provided for treating regurgitation of blood flow through a diseased heart valve. The apparatus includes an annular support member and at least one posterior leaflet support member. The annular support member has an anterior end portion, a posterior end portion, and oppositely disposed first and second intermediate portions extending between the end portions. The at least one posterior leaflet support member is securely connected to the annular support member and is dimensioned to extend across a portion of a free edge of a posterior valve leaflet. The posterior leaflet support member comprises an arcuate center portion integrally formed with and extending between first and second end portions. The arcuate center portion has a concave shape relative to the anterior end portion. At least one of the first and second end portions is securely attached to the posterior end portion.
摘要:
An apparatus for repairing a cardiac valve includes an annuloplasty ring having an expandable support member with oppositely disposed proximal and distal end portions and a main body portion between the end portions. The proximal end portion includes a plurality of wing members extending from the main body portion. Each of the wing members includes at least one hook member for embedding into a cardiac wall and a valve annulus to secure the annuloplasty ring therein. The apparatus also includes an energy delivery mechanism for selectively contracting the annuloplasty ring to restrict the valve annulus and correct valvular insufficiency. The energy delivery mechanism includes a detachable electrical lead having distal and proximal end portions. The distal end portion has a securing member for operably attaching the distal end portion to a portion of the expandable support member. The proximal end portion is operably connected to an energy delivery source.
摘要:
A method and apparatus for replacing both the native mitral valve and the native aortic valve in a heart with a stentless bioprosthetic graft is provided. The bioprosthetic graft comprises a harvested homograft that includes a mitral valve portion and an aortic valve portion, and an extension portion made of a biocompatible material. The extension portion is sutured to the homograft and is for suturing to the left atrial wall of the heart to close an incision in the left atrial wall following implantation of the mitral valve portion and the aortic valve portion of the homograft.
摘要:
An apparatus for automatically retroperfusing a coronary vein includes an intraluminal cannula having a main body portion extending between a proximal end portion and a distal end portion. The proximal end portion is for connecting to an artery outside of the pericardium to automatically supply oxygenated blood from the artery for retroperfusion. The main body portion and the distal end portion are insertable through a vein that is fluidly connected with the coronary vein and into the coronary vein. An expandable stent is attached to the distal end portion for expanding radially into engagement with the interior wall of the coronary vein to secure the distal end portion at a desired location within the coronary vein. Occluding structure for at least partially occluding the coronary vein is provided at the distal end to decrease the back-flow of blood into the right atrium during retroperfusion. The cannula includes passages that allow a limited amount of blood to bypass the occluding structure.
摘要:
An apparatus for treating cardiovascular diseases includes an expandable support member having oppositely disposed proximal and distal end portions and a main body portion between the end portions for positioning in a blood vessel. The proximal end portion of the expandable support member includes a plurality of wing members that extend from the main body portion. Each of the wing members is for engaging at least a portion of an antrum of a cardiac chamber surrounding the blood vessel. At least a portion of the expandable support member is treated with at least one therapeutic agent for eluting into the blood vessel, the cardiac chamber, and/or cardiac tissue. The expandable support member is made of wire-mesh, and at least a portion of the expandable support member may be made of a bioabsorbable material.
摘要:
A method is provided for implanting a valve having at least one valve leaflet within the cardiovascular system of a subject. One step of the method includes preparing a substantially dehydrated bioprosthetic valve and then providing an expandable support member having oppositely disposed first and second ends and a main body portion extending between the ends. Next, the substantially dehydrated bioprosthetic valve is attached to the expandable support member so that the substantially dehydrated bioprosthetic valve is operably secured within the main body portion of the expandable support member. The expandable support member is then crimped into a compressed configuration and placed at a desired location within the cardiovascular system of the subject. Either before or after placement at the desired location, fluid or blood re-hydrates the substantially dehydrated bioprosthetic valve.
摘要:
An apparatus for repairing a cardiac valve includes an annuloplasty ring having an expandable support member with oppositely disposed proximal and distal end portions and a main body portion between the end portions. The proximal end portion includes a plurality of wing members extending from the main body portion. Each of the wing members includes at least one hook member for embedding into a cardiac wall and a valve annulus to secure the annuloplasty ring therein. The apparatus also includes an energy delivery mechanism for selectively contracting the annuloplasty ring to restrict the valve annulus and correct valvular insufficiency. The energy delivery mechanism includes a detachable electrical lead having distal and proximal end portions. The distal end portion has a securing member for operably attaching the distal end portion to a portion of the expandable support member. The proximal end portion is operably connected to an energy delivery source.
摘要:
An apparatus for modifying the annulus of a cardiac valve to reduce regurgitation of blood flow through the cardiac valve includes a first annuloplasty ring having a first diameter and being disposed about a first aspect of the annulus of the cardiac valve. The apparatus also includes an elongate flexible body having proximal and distal end portions and being insertable into the first annuloplasty ring. The elongate flexible body has an adjustable mechanism for selectively adjusting the elongate flexible body from a first relaxed configuration to a second tensioned configuration. The first annuloplasty ring is adaptable to obtain a second smaller diameter and to cause the annulus of the cardiac valve to be modified and reduce regurgitation of blood flow through the cardiac valve when the elongate flexible body obtains the second tensioned configuration.