Left atrial appendage closure and delivery system thereof
A left atrial appendage (LAA) closure ( 1 ) and a system ( 6 ) for delivering the LAA closure are disclosed. The LAA closure ( 1 ) includes supporting struts ( 11 ), wherein the supporting struts ( 11 ) are distributed peripherally around a first hub ( 10 ) and extend outward, the supporting strut ( 11 ) bifurcates at a first position ( 110 ) into a left branch ( 111 ) and a right branch ( 112 ). The left branch ( 111 ) of each supporting strut ( 11 ) and the right branch ( 112 ) of an adjacent supporting strut join each other at a second position ( 113 ) and extend distally to form a distal end. The LAA closure further includes a supporting rod ( 12 ) between adjacent supporting struts ( 11 ) which ensures stability, absence of irregular deformation and lateral slippage, of the LAA closure ( 1 ). With the supporting rods ( 12 ) between the adjacent supporting struts ( 11 ), the LAA closure ( 1 ) forms a dense mesh which imparts high overall strength of the LAA closure ( 1 ).
1. A left atrial appendage (LAA) closure, comprising a plurality of supporting struts distributed peripherally around a first hub and extending outwardly from the first hub, the supporting strut bifurcating at a first position into a left branch and a right branch, the left branch of a supporting strut and the right branch of an adjacent supporting strut joining each other at a second position and extending distally to form a distal end, the LAA closure further comprising a supporting rod disposed between adjacent supporting struts.
2. The LAA closure according to claim 1 , wherein the supporting rod has a first end connected to the outside of the first hub, extending outwardly and bifurcating into a second end and a third end at a third position.
3. The LAA closure according to claim 2 , wherein the second end is fixed between the first and second positions of the left branch of the supporting struts, and the third end is fixed between the first and second positions of the right branch of the supporting struts.
4. The LAA closure according to claim 2 , wherein the second and third ends are fixed on two adjacent supporting struts.
5. The LAA closure according to claim 2 , wherein a length of the supporting rod from the first hub to the third position is smaller than a length of the supporting strut from the first hub to the first position.
6. The LAA closure according to claim 2 , wherein some or all of the supporting struts comprise a barb, and/or some or all of the left and right branches comprise a barb.
7. The LAA closure according to claim 1 , wherein the left and right branches of the same supporting strut are connected to each other at the distal ends thereof.
8. The LAA closure according to claim 7 , wherein each of the distal ends is bent toward the proximal end to form an anchor.
9. The LAA closure according to claim 8 , wherein a length from the point where the distal end starts bending to a final point of the distal end is greater than a length from a junction of the distal ends to the final point.
10. The LAA closure according to claim 1 , wherein the distal ends extend inwardly to form a second hub.
11. The LAA closure according to claim 1 , wherein the distal ends protrude radially to form an anchor.