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CN-224220198-U - Thrombus filtration system

CN224220198UCN 224220198 UCN224220198 UCN 224220198UCN-224220198-U

Abstract

The utility model relates to a thrombus filtering system, which comprises a conveying device and a filtering device, wherein the conveying device comprises a connecting piece, a handle assembly and a sheath tube, the handle assembly comprises a sliding assembly, the proximal end of the sheath tube is connected with the sliding assembly, the proximal end of the connecting piece penetrates through the proximal end of the sheath tube and then is fixed in the handle assembly, the distal end of the connecting piece is connected with the filtering device, the filtering device can be contained in the distal end of the sheath tube, and the sliding assembly can drive the sheath tube to move relative to the connecting piece and the filtering device. The thrombus filtering system can intercept and capture the fallen thrombus or calcified fragments in the operation process so as to prevent the thrombus or calcified fragments from being flushed to the distal end along with blood flow to cause vascular embolism, thereby avoiding the risks of local pain, tissue necrosis, hemiplegia, dementia and even death of patients.

Inventors

  • YANG JIANWEI
  • LI HAIQIANG
  • LI FENGJU

Assignees

  • 深圳市英耐特医疗科技有限公司

Dates

Publication Date
20260512
Application Date
20241230

Claims (10)

  1. 1. A thrombus filtering system is characterized by comprising a conveying device and a filtering device, wherein the conveying device comprises a connecting piece, a handle assembly and a sheath tube, the handle assembly comprises a sliding assembly, the proximal end of the sheath tube is connected with the sliding assembly, the proximal end of the connecting piece penetrates through the proximal end of the sheath tube and then is fixed in the handle assembly, the distal end of the connecting piece is connected with the filtering device, the filtering device can be contained in the distal end of the sheath tube, and the sliding assembly can drive the sheath tube to move relative to the connecting piece and the filtering device.
  2. 2. The thrombus filter system of claim 1 wherein said sheath comprises a sheath body and a receptacle, said receptacle proximal end being connected to said sheath body distal end, said sheath body proximal end being connected to said sliding assembly, said filter device being receivable within said receptacle.
  3. 3. The thrombus filter system of claim 1 wherein said handle assembly further comprises a housing, said slide assembly comprises a stop member, a slide member and a button, said stop member is sleeved on said slide member, said slide member proximal end is exposed to said stop member proximal end, one end of said button is connected to said slide member proximal end, the other end of said button passes through said housing and is exposed to said housing, said stop member is secured within said housing, said slide member is movable relative to said stop member under the influence of said button.
  4. 4. The thrombus filter system of claim 3, wherein said sheath proximal end is secured within said slider, a portion of said retainer side wall extends outwardly to form a hollow extension, said slider assembly further comprises a securing member, said securing member distal end side is connected to said extension proximal end and said securing member is in communication with said extension, a through slot is provided in said slider side wall at a location corresponding to said extension, and said connector proximal end extends from said sheath through said through slot into said extension and is secured within said securing member.
  5. 5. The thrombus filter system of claim 4 wherein said slider member is provided with a first seal at a distal end and a second seal at a proximal end, said extension and said channel being disposed between said first seal and said second seal.
  6. 6. The thrombus filter system of claim 3 wherein said handle assembly further comprises a protector having a proximal end connected to said housing distal end, said protector distal end being provided with a suture.
  7. 7. The thrombus filter system of claim 3 wherein said handle assembly further comprises a hemostatic valve seat comprising a body member, a first end cap, a second end cap, a third seal disposed at a distal end of said body member, said first end cap connected to said distal end of said body member, a fourth seal disposed at a proximal end of said body member, said second end cap connected to said proximal end of said body member, said distal end of said steel tube connected to said proximal end of said slider, and a steel tube received within said body member through said first end cap and said third seal.
  8. 8. The thrombus filter system of claim 1 wherein said filter device comprises a screen body comprising a frame and a junction connected to a proximal side of said frame, said junction extending proximally to form a mating portion, said mating portion being connected to said connector.
  9. 9. The thrombus filter system of claim 8 wherein said stent has a diameter which increases gradually from the proximal end to the distal end in a natural state, said stent comprising a support portion provided at the distal end and a recovery portion provided at the proximal end, said recovery portion having a length in the axial direction which is greater than the length of said support portion in the axial direction, said support portion having a length in the circumferential direction which is greater than the length of said recovery portion in the axial direction.
  10. 10. The thrombus filter system of claim 2, wherein said sheath comprises a first lumen and a second lumen axially disposed along said sheath, said first lumen and said second lumen being disposed on a proximal side of said receptacle, and the volume of the second lumen being greater than the volume of said first lumen, said connector proximal end passing through said receptacle and said second lumen and being secured within said handle assembly.

Description

Thrombus filtration system Technical Field The utility model relates to the field of interventional medicine, in particular to a thrombus filtering system. Background Interventional therapy is an emerging subject which is rapidly developed in recent years and integrates image diagnosis and clinical treatment, and is currently three clinical main supporting subjects which are parallel to the traditional internal medicine and surgery. Wherein the vascular thrombotic filtration system is primarily directed to cardiovascular disease. The main source environment of emboli of brain embolism and cerebral apoplexy is in heart, heart valve and aorta. When performing procedures on these structures, such as, for example, on-aortic cannulation, valve repair, etc. Embolic brain injury can range from latent ischemic foci to massive and even fatal strokes, with the induction of embolic formation and shedding of different sizes and types of emboli. Various devices are known in the blood vessel and carotid artery in an attempt to prevent the emboli from falling out into the brain. The thrombus filtering system is a medical instrument used in cardiovascular interventional operation, and has the main function of intercepting and capturing thrombus or calcified fragments which may fall off during operation so as to prevent the thrombus or calcified fragments from being flushed towards the distal end along with blood flow, thereby causing vascular embolism. Vascular embolism can lead to the risk of local pain, tissue necrosis, hemiplegia, dementia and even death in patients. Disclosure of utility model In order to overcome the problems in the prior art, the utility model provides a thrombus filtering system. In some embodiments of the present utility model, the thrombus filtering system includes a delivery device and a filtering device, the delivery device includes a connector, a handle assembly and a sheath, the handle assembly includes a sliding assembly, a proximal end of the sheath is connected to the sliding assembly, the proximal end of the connector passes through the proximal end of the sheath and is fixed in the handle assembly, a distal end of the connector is connected to the filtering device, the filtering device is receivable in the distal end of the sheath, and the sliding assembly is capable of driving the sheath to move relative to the connector and the filtering device. In some embodiments of the utility model, the sheath comprises a sheath body and a receiving portion, the proximal end of the receiving portion is connected to the distal end of the sheath body, the proximal end of the sheath body is connected to the sliding assembly, and the filter device is receivable within the receiving portion. In some embodiments of the present utility model, the handle assembly further includes a housing, the sliding assembly includes a limiting member, a sliding member and a button, the limiting member is sleeved on the sliding member, a proximal end of the sliding member is exposed at a proximal end of the limiting member, one end of the button is connected with the proximal end of the sliding member, the other end of the button passes through the housing and is exposed outside the housing, the limiting member is fixed in the housing, and the sliding member can move relative to the limiting member under the driving of the button. In some embodiments of the present utility model, the proximal end of the sheath is fixed in the sliding member, a portion of the side wall of the limiting member extends outward to form a hollow extension portion, the sliding assembly further includes a fixing member, the distal end side of the fixing member is connected to the proximal end of the extension portion, the fixing member is in communication with the extension portion, a through slot is provided on a position of the side wall of the sliding member corresponding to the extension portion, and the proximal end of the connecting member passes through the through slot to enter the extension portion after passing out of the sheath and is fixed in the fixing member. In some embodiments of the utility model, the slider distal end is provided with a first seal and the slider proximal end is provided with a second seal, the extension and the through slot being both disposed between the first seal and the second seal. In some embodiments of the utility model, the handle assembly further comprises a protector having a proximal end connected to the distal end of the housing, the distal end of the protector being provided with a suture. In some embodiments of the utility model, the handle assembly further comprises a hemostatic valve seat comprising a body member, a first end cap, a second end cap, a third seal, a fourth seal, and a steel tube, the third seal disposed at a distal end of the body member, the first end cap coupled to the distal end of the body member, the fourth seal disposed at a proximal end of the body member, the second end ca