Left atrial appendage occluder, and method of application

A left atrial appendage (LAA) occluder, comprising a plugging portion, a connecting portion, and a covering portion that are connected sequentially along an axial direction, wherein

• the plugging portion comprises a first gathering member and a first support mesh that can be transformed to have a reduced radial profile;
• a plurality of anchoring members for grasping LAA tissues are arranged on outer peripheral surface of the first support mesh;
• the first gathering member is provided at an end of the first support mesh close to the connecting portion;
• and the first gathering member is detachably connected to the connecting portion;
• the covering portion comprises a second gathering member and a second support mesh that can be transformed to have a reduced radial profile;
• in a natural state, radial profile of the covering portion is not less than radial profile of the plugging portion;
• the second gathering member is provided at an end of the second support mesh away from the connecting portion;
• and an end of the first gathering member away from the first support mesh and an end of the second gathering member away from the first support mesh are respectively provided with pushing device connection positions, such that the plugging portion has two usage modes;
• in response to an independent use of the plugging portion, the plugging portion is disconnected from the connecting portion, and a pushing device can be connected with an end of the first gathering member away from the plugging portion;
• and
• in response to a combined use of the plugging portion, the plugging portion is detachably connected to the covering portion through the connecting portion, and the pushing device can be connected with an end of the second gathering member away from the covering portion.