Left atrial appendage closure and delivery system thereof

Abstract

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 delivery system used for deploying the LAA, the delivery system comprising a first delivery member and a second delivery member inside the first delivery member, wherein
 the first delivery member is adapted to be engaged with or disengaged from a first hub of the LAA closure,   the second delivery member is adapted to be engaged with or disengaged from a second hub of the LAA closure.   
     
     
         2 . The LAA closure delivery system according to  claim 1 , wherein the first hub is engaged with the second hub before the LAA closure is released from the system. 
     
     
         3 . The LAA closure delivery system according to  claim 1 , further comprising a sheath in which the first delivery member is received. 
     
     
         4 . The LAA closure delivery system according to  claim 1 , further comprising a stopper for fixing the first delivery member relative to the second delivery member. 
     
     
         5 . The LAA closure delivery system according to  claim 1 , further comprising a handle provided at a proximal end of the first delivery member and/or at a proximal end of the second delivery member, being provided with a visible mark. 
     
     
         6 . The LAA closure delivery system according to  claim 1 , wherein the LAA closure comprises a first portion and a second portion, the first portion having a first end connected to the first hub and a second end connected to a first end of the second portion, the second portion having a second end connected to the second hub. 
     
     
         7 . The LAA closure delivery system according to  claim 6 , wherein the second portion is located inside the first portion before the LAA closure is released from the system. 
     
     
         8 . The LAA closure delivery system according to  claim 1 , wherein the first delivery member is flared at a distal end of the first delivery member. 
     
     
         9 . The LAA closure delivery system according to  claim 1 , wherein the second delivery member is engaged with the second hub by a threaded connection.