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CN-121987294-A - Lower limb arterial thrombus suction device

CN121987294ACN 121987294 ACN121987294 ACN 121987294ACN-121987294-A

Abstract

The invention discloses a lower limb arterial thrombus suction device, which belongs to the technical field of medical instruments and comprises a catheter assembly, a distal execution assembly, a thrombus suction assembly and a control handle, wherein the catheter assembly is formed by layering and sleeving a guide wire, a transmission catheter and a protection sheath, the front end of the transmission catheter is provided with an expansion net, the distal execution assembly comprises a suction pipe and a linkage cutting pipe, the front end of the suction pipe is provided with a conical tip and symmetrical suction holes, a spiral cutter head at the front end of the linkage cutting pipe is accommodated in the conical tip, the thrombus suction assembly realizes multi-channel cooperation through a three-way pipe, a power transmission structure in the control handle drives the linkage cutting pipe to rotate at constant speed, so that thrombus grabbing, cutting and suction integrated cooperative operation is realized, various thrombus cleaning efficiencies are improved, thrombus fragment escape is avoided, and risk of vascular scratch and complications is reduced.

Inventors

  • XU YOUYAO
  • XIAO ZIBIN
  • CHENG GUOBING
  • WU SENYAN
  • LI XIAOYANG

Assignees

  • 衢州市人民医院

Dates

Publication Date
20260508
Application Date
20260311

Claims (10)

  1. 1. The lower limb arterial thrombus suction device is characterized by comprising a catheter assembly (1), a distal execution assembly (2), a thrombus suction assembly (3) and a control handle (4), wherein the distal execution assembly (2) is arranged on the catheter assembly (1), the thrombus suction assembly (3) is arranged at the tail part of the distal execution assembly (2), the catheter assembly (1) passes through the thrombus suction assembly (3), and the tail part of the catheter assembly (1) is arranged on the control handle (4).
  2. 2. The lower limb arterial thrombus suction device as in claim 1 wherein the catheter assembly (1) comprises a guide wire (11), a transmission catheter (12) and a protective sheath (13), wherein the transmission catheter (12) is sleeved outside the guide wire (11), the protective sheath (13) is sleeved outside the transmission catheter (12), and an expansion net (121) is arranged at the front end of the transmission catheter (12).
  3. 3. The arterial thrombus aspiration device of claim 2, wherein the distal end executing assembly (2) comprises an aspiration tube (21) and a linkage cutting tube (22), the linkage cutting tube (22) is arranged in the aspiration tube (21), the linkage cutting tube (22) is sleeved outside the protective sheath tube (13), a conical tip (211) is arranged at the front end of the aspiration tube (21), a guide hole (2111) is arranged at the front end of the conical tip (211), the catheter assembly (1) penetrates through the guide hole (2111), aspiration holes (212) are symmetrically arranged on two sides of the conical tip (211), a screw bit (221) is arranged at the front end of the linkage cutting tube (22), and the screw bit (221) rotates inside the conical tip (211).
  4. 4. A lower limb arterial thrombus suction device according to claim 3, wherein the thrombus suction assembly (3) comprises a three-way pipe (31), a negative pressure pipe (32) and a suction device (33), the three-way pipe (31) is arranged at the tail part of the suction pipe (21), a bolt discharge pipe (311) is arranged on the side wall of the three-way pipe (31), one end of the negative pressure pipe (32) is connected to the bolt discharge pipe (311), and the other end of the negative pressure pipe (32) is connected to the suction device (33).
  5. 5. A lower limb arterial thrombus aspiration device in accordance with claim 4, wherein one end of the tee (31) is provided with a locking tube (312), the other end of the tee (31) is provided with an elastic through hole pad (313), the tee (31) is further provided with a locking ring (314), the aspiration tube (21) is arranged on the locking tube (312) and is fixed by the locking ring (314), and the catheter assembly (1) passes through the center of the elastic through hole pad (313).
  6. 6. A lower limb arterial thrombus aspiration device in accordance with claim 5 wherein said control handle (4) is provided with a sleeve (41), a grip (42) and an activation button (43), said sleeve (41) is provided on top of the grip (42), said activation button (43) is provided on the side wall of the grip (42), said catheter assembly (1) is passed through the sleeve (41).
  7. 7. The arterial thrombus aspiration device of lower limb according to claim 6, wherein the sleeve (41) is internally provided with a rotating shaft cavity (411), the rotating shaft cavity (411) is communicated with the inside of the grip (42), the rear end of the sleeve rotating shaft cavity (411) is provided with a rotating shaft fixing tube (412), the front end of the rotating shaft cavity (411) is provided with a contraction ring (413), the side wall of the rotating shaft cavity (411) is provided with a locking groove (414) penetrating through the outside, and the inside of the grip (42) is provided with a gear column (421).
  8. 8. The arterial thrombus aspiration device of claim 7, wherein the control handle (4) is internally provided with a snap ring (44), a driving rotating shaft (45), a connecting gear (46) and a motor (47), the snap ring (44) is arranged on the driving rotating shaft (45), the driving rotating shaft (45) is arranged on a rotating shaft fixing tube (412), the connecting gear (46) is arranged on a gear column (421), and the motor (47) is arranged in the grip (42).
  9. 9. The lower limb arterial thrombus suction device as in claim 8, wherein the driving rotating shaft (45) is provided with a clamping plate (451) and a ring gear (452), the ring gear (452) is arranged at the tail of the clamping plate (451), a return spring (453) is arranged at the rear side of the ring gear (452), the tail end of the return spring (453) is attached to the inner wall of the rotating shaft cavity (411), an inner contact (4511) is arranged on the inner wall of the front end of the clamping plate (451), an outer inclined boss (4512) is arranged on the outer wall of the front end of the clamping plate (451), and the outer inclined boss (4512) is located at the contraction ring (413).
  10. 10. The arterial thrombus aspiration device of claim 9, wherein the snap ring (44) is sleeved outside the clamping plate (451), a locking column (441) is arranged on the outer wall of the snap ring (44), the locking column (441) is arranged in the locking groove (414), a motor gear (471) is arranged on the motor (47), the motor gear (471) is meshed with the connecting gear (46), and the connecting gear (46) is meshed with the ring gear (452).

Description

Lower limb arterial thrombus suction device Technical Field The invention belongs to the technical field of medical appliances, and particularly relates to a lower limb arterial thrombus suction device. Background Arterial thrombosis of lower limbs is a clinically common peripheral vascular disease, is mostly caused by vascular injury, hypercoagulable state of blood or blood stasis, can cause ischemia and hypoxia of lower limb tissues after the thrombus blocks blood vessels, and can cause limb necrosis even endanger life when serious. The main clinical treatment means comprise medicine thrombolysis, vascular bypass grafting and interventional thrombus removal, the latter is the first choice due to minimally invasive and rapid recovery, and a thrombus suction device is used as a core instrument to directly determine the removal efficiency and the postoperative vascular patency rate. The existing device is mainly of a simple negative pressure suction or rotary cutting suction structure, has obvious defects that the simple negative pressure has poor cleaning effect on old, calcified and massive thrombus, is easy to remain, block holes and leak due to negative pressure, and can easily escape thrombus fragments to cause distal embolism, the combined device has weak cutting and suction cooperativity, an exposed cutter head can easily scratch blood vessels, and the capability of adapting to small blood vessels at the distal end of lower limbs and the variation of knee diseases is insufficient. Disclosure of Invention Aiming at the situation, in order to overcome the defects in the prior art, the invention provides the lower limb arterial thrombus suction device, which effectively solves the problems. The invention provides a lower limb arterial thrombus suction device which comprises a catheter assembly, a distal execution assembly, a thrombus suction assembly and a control handle, wherein the distal execution assembly is arranged on the catheter assembly, the thrombus suction assembly is arranged at the tail part of the distal execution assembly, the catheter assembly penetrates through the thrombus suction assembly, and the tail part of the catheter assembly is arranged on the control handle. Further, the catheter assembly comprises a guide wire, a transmission catheter and a protection sheath tube, wherein the transmission catheter is sleeved on the outer side of the guide wire, the protection sheath tube is sleeved on the outer side of the transmission catheter, and an expansion net is arranged at the front end of the transmission catheter. Preferably, the guide wire provides a stable path for the propulsion of a subsequent component, the transmission guide tube is sleeved outside the guide wire and is adapted to the layered structure of the protective sheath tube, the accurate power transmission can be realized, the front end expansion net and the linkage cutting tube are driven to complete the cooperative action, the protective sheath tube is used as an outer protective structure, and the transmission guide tube and the inner wall of a blood vessel can be isolated. Further, the distal end execution assembly comprises a suction pipe and a linkage cutting pipe, the linkage cutting pipe is arranged in the suction pipe, the linkage cutting pipe is sleeved outside the protective sheath pipe, the front end of the suction pipe is provided with a conical tip, the front end of the conical tip is provided with a guide hole, the catheter assembly penetrates through the guide hole, suction holes are symmetrically formed in two sides of the conical tip, the front end of the linkage cutting pipe is provided with a spiral cutter head, and the spiral cutter head rotates inside the conical tip. The front end cone-shaped tip is designed to be attached to the anatomical feature of a lower limb artery, the thrombus can be smoothly punctured to the thrombus position, mechanical damage to the vessel wall is reduced, suction holes symmetrically arranged on two sides can enlarge the negative pressure adsorption range, the omnibearing capture of the thrombus is realized, local thrombus is avoided, missing suction is avoided, thrombus cleaning thoroughness is improved, a linkage cutting sleeve is arranged on the outer side of a protective sheath tube and is matched with an embedded structure of a suction tube, cutting and suction integration is realized by being synchronously linked with suction action, a front end spiral cutter head can rotate at a high speed, massive and intractable thrombus is cut into tiny fragments, the problems that the large thrombus is difficult to be sucked by negative pressure and a lumen is easy to block are solved, suction efficiency is greatly improved, the cutter head is contained in the cone-shaped tip, the inner wall of the vessel is prevented from being directly contacted when rotating, the risk of vascular scratch is reduced, and the treatment scene of a fragile lower limb artery is adapted. Further