Thrombus aspiration device

Abstract

The invention relates to an aspiration device, in particular to a thrombus aspiration device, and belongs to the technical field of medical instrument structures. The thrombus aspiration device comprises a metal sheath, a rotary cutter and an expander. The metal sheath comprises a metal spiral pipe, a side pipe is arranged at one end of the metal spiral pipe, and one end of the side pipe is movably connected with a first backflow preventing cap. The rotary cutter comprises a crank, a spiral flow guide groove is formed in the end, away from the handle, of the rotary cutter, a second backflow preventing cap is arranged at the end, close to the handle, of the rotary cutter, and a blade is arranged between the second backflow preventing cap and the spiral flow guide groove. The thrombus aspiration device can replace an original long metal sheath, the expander is withdrawn, the rotary cutter is fed in, the thrombus aspiration device is formed, the side pipe generates negative pressure through pumpback of an injector, thrombus is made to enter the metal sheath, the rotary cutter is rotated, the thrombus is conveyed to move into a lumen under the combined action of the rear driving force of the flow guide groove and the negative pressure, the middle blade cuts the thrombus into small blocks, the thrombus is sucked out of the side pipe, the situation that large thrombus blocks block the pipe cavity, and consequently the aspiration process is interrupted is avoided, operation efficiency is improved, and operative complications are reduced.

Description

Technical field [0001] The present invention involves a suction device. Specifically, the thrombosis absorbing device is the field of medical device structure technology. Background technique [0002] During the intervention surgery of lower limb vein or cavity venous thrombosis, the tube sheath or large cavity ducts need to be used to pump blood thrombus.Due to the hard texture of some thrombus and larger volume than the pipe cavity, it is easy to block the pipe cavity, resulting in a small amount of thrombosis each time, and it is necessary to repeatedly remove the tube sheath or large cavity ducts, then inserted the duct sheath or large cavity duct.In order to pull out all the thrombus, this repeated operation can cause the efficiency of the suction, which extend the operation time of the surgical operation, and the incidence of complications also increases accordingly, such as endometrial damage, excessive blood loss, and postoperative infection. [0003] At present, there i...

AI Technical Summary

Problems solved by technology

Because some thrombi are hard and larger than the lumen of the catheter, they are easy to block the lumen of the catheter, resulting in a small number of thrombus per aspiration, and repeated removal of the catheter sheath or large-lumen catheter, reinsertion of the catheter sheath or large-lumen catheter, In order to completely extract the thrombus, such repeated operations will lead to low suction efficiency, prolong the operation time, and increase the incidence of complications, such as intimal injury, excessive blood loss, and postoperative infection.

[0003] At present, there is no special surgical instrument for aspiration of thrombus. Introducer sheaths or large lumen catheters are often used to aspirate thrombus. Operating time, causing great inconvenience to the operation

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