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CN-224220195-U - Thrombus aspiration catheter and catheter body

CN224220195UCN 224220195 UCN224220195 UCN 224220195UCN-224220195-U

Abstract

The application discloses a thrombus suction catheter and a catheter body, wherein the thrombus suction catheter comprises a suction tube, a filtering piece and an outflow channel, the suction tube comprises a tube wall and a pipeline formed by encircling the tube wall, the tube wall comprises a body part and convex ribs which are arranged in a protruding way towards the axis of the pipeline, at least two convex ribs extend along the connecting line direction from the proximal end to the distal end of the suction tube, a groove is formed between every two adjacent convex ribs, the filtering piece is connected with the suction tube and is positioned in the pipeline and at least partially opposite to the groove, the outflow channel is connected with the proximal end of the suction tube, and an outflow window for communicating the inside and the outside of the pipeline is arranged on the outflow channel. According to the thrombus suction catheter disclosed by the application, the catheter wall comprises the body part and the protruding ribs, and the grooves are formed between the adjacent protruding ribs, so that when thrombus is sucked into the pipeline and gathered at the filter element, the gaps between the thrombus and the catheter wall and at the grooves can allow blood to pass through, the probability that the thrombus blocks the pipeline at the filter element is further reduced, and the capacity of accommodating the thrombus in the suction tube is improved.

Inventors

  • HAN YONGTAO
  • WANG ZHENYU
  • ZHOU JUNLEI
  • TANG ZHIRONG

Assignees

  • 丰凯利医疗器械(上海)有限公司

Dates

Publication Date
20260512
Application Date
20241228

Claims (12)

  1. 1. A thrombus aspiration catheter, comprising: The suction tube comprises a tube wall and a pipeline formed by encircling the tube wall, the tube wall comprises a body part and protruding ribs protruding towards the axis of the pipeline, at least two protruding ribs extend along the connecting line direction from the proximal end to the distal end of the suction tube, and a groove is formed between every two adjacent protruding ribs; A filter connected with the suction pipe and positioned in the pipeline and at least partially opposite to the groove; And the outflow channel is connected with the proximal end of the suction tube, and an outflow window which is communicated with the inside and the outside of the pipeline is arranged on the outflow channel.
  2. 2. The aspiration catheter of claim 1, wherein the filter comprises a cone-shaped net bag having an opening at a distal end and a pocket at a proximal end, the opening being connected to the aspiration tube to restrict thrombus entering the aspiration tube within the net bag.
  3. 3. The thrombus aspiration catheter according to claim 1, wherein the inner surface of said body portion encloses a first reference circumferential surface, the plurality of said protruding ribs enclose a second reference circumferential surface toward the top of the axis of said tube, and the diameter D 1 of said first reference circumferential surface and the diameter D 2 of said second reference circumferential surface satisfy the formula 0.8< D 2 /D 1 <1.
  4. 4. The aspiration catheter for thrombus according to claim 1, wherein the inner surface of the body portion is surrounded to form a first reference circumferential surface, the diameter of the first reference circumferential surface is D 1 , the number of the protruding ribs is N, the width of the protruding ribs in the circumferential direction of the aspiration tube is L, and the protruding ribs satisfy the formula of L x N/(pi x D 1 ) +.0.35.
  5. 5. The thrombus aspiration catheter of claim 1, wherein the protruding ribs have at least one of triangular, rectangular, semicircular and trapezoidal cross-sectional shapes in an axial direction perpendicular to the aspiration tube.
  6. 6. A thrombus-aspiration catheter according to claim 1, wherein the protruding ribs extend in a straight or spiral direction.
  7. 7. A thrombus-aspiration catheter according to claim 6, wherein the protruding ribs extend in a helical direction, and the angle between the tangential direction of the protruding ribs and the axial direction is less than 30 °.
  8. 8. A thrombus aspiration catheter according to claim 1, wherein the tube wall comprises a support structure and a cover layer, the cover layer being located on a side of the support structure facing towards the tube and/or a side facing away from the tube, the support structure having a hardness greater than the cover layer.
  9. 9. A thrombus-aspiration catheter according to claim 8, wherein the support structure is grid-like or comprises at least one support rib extending in a helical direction and arranged around the tube.
  10. 10. The thrombus-aspiration catheter according to claim 8, wherein said protruding ribs are each constituted by said cover layer, or wherein said protruding ribs are constituted partly by said support structure and partly by said cover layer.
  11. 11. The thrombus aspiration catheter of claim 1, further comprising: A distal tube connected to a distal end of the suction tube; And/or the thrombus-aspiration catheter further comprises a one-way valve connected with the tube wall and located in the tube, the one-way valve being located at the distal end of the filter.
  12. 12. The utility model provides a body, its characterized in that includes the pipe wall and by the pipe wall encloses the pipeline that closes and forms, the pipe wall includes body portion and orientation the convex rib of axis convex of pipeline, at least two the convex rib extends along the proximal end of body to the line direction of distal end, adjacent two form the recess between the convex rib.

Description

Thrombus aspiration catheter and catheter body Technical Field The application belongs to the technical field of medical appliances, and particularly relates to a thrombus aspiration catheter and a catheter body. Background The main treatment means of thrombotic diseases comprise anticoagulation, anti-thrombus, thrombolysis and other drug treatments, interventional operation treatments and the like. In interventional operation, thrombus can be directly dragged through the bracket to realize removal of the thrombus, but the way can not ensure that the thrombus block is completely removed, and thrombus residues possibly exist. Or the thrombus attached to the surface of the blood vessel can be cut through a mechanical structure or high-speed water flow, and the broken thrombus is sucked out through a suction structure, but the red blood cells or the blood vessel wall in the patient can be damaged in the process of breaking the thrombus, and the broken thrombus can be flushed to other positions in the patient, so that the safety of the patient is influenced. At present, in order to avoid thrombus residues and injury to a patient in the thrombus breaking process, the negative pressure suction can be carried out on thrombus in the patient through a suction structure. The aspiration structure generally includes an aspiration catheter and a filter positioned within the catheter, the aspiration catheter collecting thrombus within the filter as blood is aspirated by the aspiration catheter. However, the thrombus is accumulated at the filter element, so that the suction catheter can be blocked, and the suction catheter cannot continuously suck thrombus, so that the thrombus collection amount of the suction catheter is obviously affected. Disclosure of utility model Embodiments of the present application provide a thrombus aspiration catheter and tube that aims to reduce the probability of a thrombus clogging a conduit at a filter. An embodiment of the first aspect of the application provides a thrombus suction catheter, which comprises a suction tube, a filtering piece and an outflow channel, wherein the suction tube comprises a tube wall and a tube formed by encircling the tube wall, the tube wall comprises a body part and convex ribs protruding towards the axis of the tube, at least two convex ribs extend along the connecting line direction from the proximal end to the distal end of the suction tube, a groove is formed between every two adjacent convex ribs, the filtering piece is connected with the suction tube and is positioned in the tube and at least opposite to part of the groove, the outflow channel is connected with the proximal end of the suction tube, and an outflow window for communicating the inside and the outside of the tube is arranged on the outflow channel. According to an embodiment of the first aspect of the application, the filter comprises a cone-shaped net bag, wherein the far end of the net bag is provided with an opening, the near end of the net bag is a stomacher, and the opening is connected with the suction tube so as to limit thrombus entering the suction tube to the net bag. According to an embodiment of the first aspect of the present application, the inner surface of the body portion encloses a first reference circumferential surface, the plurality of protruding ribs enclose a second reference circumferential surface toward the top of the axis of the pipe, and a diameter D 1 of the first reference circumferential surface and a diameter D 2 of the second reference circumferential surface satisfy the formula 0.8< D 2/D1 <1. According to the embodiment of the first aspect of the application, the inner surface of the body part surrounds to form a first reference circumferential surface, the diameter of the first reference circumferential surface is D 1, the number of the protruding ribs is N, the width of the protruding ribs in the circumferential direction of the suction pipe is L, and the protruding ribs meet the formula L x N/(pi x D 1) less than or equal to 0.35. According to an embodiment of the first aspect of the present application, the protruding ribs have at least one of a triangular, rectangular, semicircular and trapezoidal cross-sectional shape in an axial direction perpendicular to the suction pipe. According to an embodiment of the first aspect of the application, the protruding ribs extend in a straight or spiral direction. According to an embodiment of the first aspect of the application, the protruding ribs extend in a spiral direction, the angle between the tangential direction of the protruding ribs and the axial direction being less than 30 °. According to an embodiment of the first aspect of the application, the pipe wall comprises a support structure and a cover layer, the cover layer being located on a side of the support structure facing the pipe and/or on a side facing away from the pipe, the support structure having a hardness which is greater than the hardness of