2The aspiration catheter is composed of a catheter and a guide sheath. The catheter is composed of a catheter seat, a stress relief tube and a tube body. The catheter is coated with a hydrophilic coating, and the tip of the catheter is pre-shaped to make it easy to reach the lesion position. The catheter primarily consists of the tube body, stress relief tube and catheter seat. The guide sheath can be detached to guide the catheter into the sheath.