A resection device

Abstract

The application discloses a resection device, which comprises a cutting assembly and an anchoring assembly, the cutting assembly is provided with a central cavity in the axial direction; the anchoring assembly comprises a push tube, a first inner tube arranged in the push tube and a protective net connected to the distal side of the first inner tube, the push tube is arranged in the central cavity and can pass through the distal end of the cutting assembly, and the push tube and the first inner tube can move relatively in the axial direction to control the expansion or contraction of the protective net. The distal end of the cutting assembly of the resection device is provided with a protective net, which can be combined with the inner wall of the blood vessel after being released, so that the cut thrombus tissue in the blood vessel can be prevented from escaping to the distal end, the preoperative separate placement of an embolic protection device is avoided, the complexity of the operation is reduced, the operation time is reduced and the operation success rate is improved.

Claims

1. A resection device, characterized in that, The device includes a cutting assembly and an anchoring assembly. The cutting assembly includes a torque shaft and a cutting element disposed at the distal end of the torque shaft. The cutting element includes a blade. A central cavity is disposed axially within the torque shaft. The anchoring assembly includes a push tube, an inner tube passing through the push tube, and a protective net connected to the distal end of the inner tube. The push tube passes through the central cavity and can pass through the distal end of the cutting assembly. The push tube and the inner tube can move relative to each other axially to control the expansion or contraction of the protective net. The inner tube has a first inner cavity for inserting a guidewire, through which a path for the outer tube of the resection device to extend into the blood vessel can be established. The protective net is disposed at the distal end of the inner tube. The inner tube and the push tube are slidably connected axially, so that the protective net is contained within the push tube or extends out of the push tube. When the protective net is contained within the cavity of the push tube, it is in a straight state. When the push tube moves proximally relative to the inner tube, the protective net extends out of the cavity of the push tube and is in an expanded state.

2. The resection device according to claim 1, characterized in that, The cutting device further includes a push handle and a slider disposed on the push handle. The slider slides along the axial direction of the push handle. The proximal end of the push tube and the proximal end of the inner tube pass through the push handle. The inner tube is fixed in the push handle and the push tube is connected to the slider, or the push tube is fixed in the push handle and the inner tube is connected to the slider.

3. The resection device according to claim 1, characterized in that, The protective net is formed by weaving filaments with shape memory properties, and mesh holes are formed between the filaments.

4. The resection device according to claim 3, characterized in that, The protective mesh is provided with at least two developing structures located at the near end and the far end of the protective mesh, respectively.

5. The resection device according to claim 3, characterized in that, The protective net is provided with a coating structure that completely or partially covers the protective net.

6. The resection device according to claim 1, characterized in that, The resection device further includes the outer tube and a handle connected to the outer tube. The cutting assembly includes a torque shaft and a cutting element disposed at the distal end of the torque shaft. The central cavity is disposed along the axial direction of the torque shaft. The outer tube is sleeved on the torque shaft, and a conveying cavity is formed between the outer tube and the torque shaft. A portion of the shaft section on the torque shaft is provided with a conveying spiral section, which is used to convey the thrombus tissue cut by the cutting element into the conveying cavity and to the proximal end.

7. The resection device according to claim 6, characterized in that, The resection device further includes a thrombus removal component, which is connected to the proximal end of the outer tube; the handle is provided with a bearing assembly and a drive mechanism, the bearing assembly cooperates with the proximal end of the torque shaft, and the drive assembly is used to drive the torque shaft to rotate and drive the cutting component to rotate to cut the thrombus tissue.

Images