Distal thrombectomy device

A distal thrombectomy device, comprising:

• a wall-contact protective umbrella (1), comprising a pushing unit (11) and a basket (12), wherein an end of the basket (12) is connected to the pushing unit (11), and another end of the basket (12) is provided with an opening (121), the pushing unit (11) is tubular, the wall-contact protective umbrella (1) is capable of being located at a distal end of an aspiration catheter, the basket (12) is provided on a side of the pushing unit (11) away from the aspiration catheter, and the basket (12) is used to capture a thrombus;
• and
• a built-in removal device (2), capable of penetrating the wall-contact protective umbrella (1) and capable of extending out of the opening (121), wherein the built-in removal device (2) is used to cut and remove the thrombus to unblock the distal end of the aspiration catheter and adjacent areas of the distal end of the aspiration catheter;
• the built-in removal device (2) comprises a delivery guidewire assembly (21), a filter mesh (22) and a distal spring (23) connected in sequence, the distal spring (23) is used as an unblocking guide, and the filter mesh (22) is used to cut and remove the thrombus;
• the delivery guidewire assembly (21) comprises a first guidewire (211) and a proximal spring (212), the proximal spring (212) connects the first guidewire (211) and the filter mesh (22), the proximal spring (212) is supported inside the pushing unit (11), the proximal spring (212) has a length greater than a length of the distal spring (23), and an outer diameter of the proximal spring (212) is greater than an outer diameter of the distal spring (23).