the outer surfaces of the strut and apex region and interposed between the struts and appendage wall when placed thus the mesh functions as a sleeve which prevents passage of the clots as they would be captured within the sleeve or net like device the mesh in the foregoing embodiments can be attached by various methods such as bonding clamping or suturing the method of placement of the closure device of the present invention will now be described for closing a left atrial appendage in conjunction with the embodiment of fig1 by way of example with the mesh delivered in conjunction with the securement member the other embodiments are inserted in a similar fashion a delivery catheter 50 is inserted through an introducer sheath 100 in the femoral vein a and advanced through the septum to access the left atrial appendage b as shown in fig7 for insertion the securement member is in the collapsed position a pusher not shown is advanced distally at a proximal end of the catheter 50 to advance the device 10 from the catheter 50 as the struts are exposed they are warmed by body temperature and return toward their shape memorized deployed position as shown in fig9 to engage the appendage wall w the extent they return to their fully memorized position will depend on the size of the appendage preferably the securement member will be positioned at the opening to the appendage and be substantially flush with the opening as shown.