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CN-122005990-A - Cannula for extracorporeal circulation

CN122005990ACN 122005990 ACN122005990 ACN 122005990ACN-122005990-A

Abstract

The invention relates to the technical field of medical equipment, and provides an intubation tube for extracorporeal circulation, which comprises an intubation tube body; the side wall of the cannula body and the first end are provided with first open pore areas at a first interval, a plurality of first side holes are arranged in the first open pore areas, and the first side holes are arranged on the side wall of the cannula body in an array mode. According to the cannula for extracorporeal circulation, the first end of the cannula body is inserted into a vein and communicated with the vein, the second end of the cannula body is communicated with external equipment so as to form a circulation loop in cooperation with the external equipment and the arterial cannula, blood is drained from the inside to the outside, and is returned to the inside through the arterial cannula after gas exchange through the membrane oxygenator, so that the heart and lung functions are temporarily replaced, rescuing treatment is provided for a critical patient, and meanwhile, the first side holes are arranged at the position, close to the first end, of the cannula body, and can effectively improve a flow field near an outlet of the cannula, so that the recirculation rate is reduced.

Inventors

  • XU JIAN
  • CAO CHUNLEI
  • ZHU CHENQI
  • MA YAJUN
  • JIA SHAOCHUAN

Assignees

  • 航天新长征医疗器械(北京)有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. An extracorporeal circuit cannula, comprising: A cannula body having a first end for insertion into a venous vessel for communication therewith and a second end for communication with an external device; a first open hole area is arranged on the side wall of the cannula body and at a first distance from the first end, and a plurality of first side holes are arranged in the first open hole area; The plurality of first side holes are arranged in an array on the side wall of the cannula body.
  2. 2. The cannula for extracorporeal circulation according to claim 1, wherein the plurality of first side holes are divided into a plurality of groups, the plurality of groups of first side holes are arranged at intervals along the axial direction of the cannula body, each group of first side holes comprises a plurality of first side holes arranged at intervals along the circumferential direction of the cannula body, and two adjacent groups of first side holes are arranged in a staggered manner along the axial direction of the cannula body.
  3. 3. The cannula for extracorporeal circulation according to claim 2, wherein the first side holes are divided into three groups, the three groups of the first side holes are arranged at equal intervals along the axial direction of the cannula body, each group of the first side holes comprises two first side holes, and the two first side holes are oppositely arranged along the radial direction of the cannula body.
  4. 4. The cannula for extracorporeal circulation according to claim 2, wherein the first side holes are divided into two groups, the two groups of the first side holes are arranged at intervals along the axial direction of the cannula body, each group of the first side holes comprises three first side holes, and the three first side holes are arranged at equal intervals along the circumferential direction of the cannula body.
  5. 5. The cannula for extracorporeal circulation according to any one of claims 1 to 4, wherein a distance between two adjacent sets of the first side holes in an axial direction of the cannula body is not less than 2mm and not more than 10mm.
  6. 6. The cannula for extracorporeal circulation according to any one of claims 1 to 4, wherein the first pitch is not less than 5mm and not more than 50mm.
  7. 7. The cannula for extracorporeal circulation according to any one of claims 1-4, wherein the cannula body further comprises a plurality of second side holes; The plurality of second side holes are arranged between the first opening area and the second end of the cannula body, the plurality of second side holes are divided into a plurality of groups, the plurality of groups of second side holes are arranged at intervals along the axial direction of the cannula body, and each group of second side holes comprises a plurality of second side holes arranged at intervals along the circumferential direction of the cannula body.
  8. 8. The cannula for extracorporeal circulation according to claim 7, wherein a distance between two adjacent sets of the second side holes in an axial direction of the cannula body is not less than 25mm and not more than 50mm; And/or the number of the groups of groups, The distance between the group of second side holes and the first side holes closest to the first end of the cannula body is not less than 25mm and not more than 50mm.
  9. 9. The cannula for extracorporeal circulation according to claim 7, wherein the axial direction of the first side hole and the axial direction of the cannula body are disposed at an angle; And/or the number of the groups of groups, The axial direction of the second side hole and the axial direction of the cannula body are arranged in an angle.
  10. 10. The cannula for extracorporeal circulation according to claim 7, wherein the aperture of the first side hole is not smaller than 2mm and not larger than 3mm; And/or; the aperture of the second side hole is not smaller than 2mm and not larger than 3mm.

Description

Cannula for extracorporeal circulation Technical Field The invention relates to the technical field of medical equipment, in particular to an intubation tube for extracorporeal circulation. Background Arteriovenous cannulas are key components of life support systems such as external membrane pulmonary oxygenation, and performance core indexes of arteriovenous cannulas comprise recirculation rate and hemolysis index. The recirculation rate refers to the proportion of oxygenated blood that is not effectively utilized and is returned directly to the ECMO (Extracorporeal Membrane Oxygenation ) system, a high recirculation rate can significantly reduce the oxygenation efficiency of the system, and the hemolysis index reflects the degree of mechanical damage of the cannula to blood cells. Existing venous cannulas tend to induce flow separation, vortex formation or localized high shear stress regions near the outlet, which can lead to higher recirculation rates and increased risk of blood damage. Disclosure of Invention The invention provides an insertion tube for extracorporeal circulation, which is used for solving the problems that flow separation is easy to cause near an outlet of a venous insertion tube in the prior art, vortex flow is easy to form or local high-shear stress areas are formed, and the adverse flow fields can cause higher recirculation rate and increase the risk of blood damage. The invention provides an insertion tube for extracorporeal circulation, comprising: A cannula body having a first end for insertion into a venous vessel for communication therewith and a second end for communication with an external device; a first open hole area is arranged on the side wall of the cannula body and at a first distance from the first end, and a plurality of first side holes are arranged in the first open hole area; The plurality of first side holes are arranged in an array on the side wall of the cannula body. According to the cannula for extracorporeal circulation, the plurality of first side holes are divided into a plurality of groups, the plurality of groups of first side holes are distributed at intervals along the axial direction of the cannula body, each group of first side holes comprises a plurality of first side holes distributed at intervals along the circumferential direction of the cannula body, and two adjacent groups of first side holes are distributed in a staggered manner along the axial direction of the cannula body. According to the cannula for extracorporeal circulation, the first side holes are divided into three groups, the three groups of the first side holes are distributed at equal intervals along the axial direction of the cannula body, each group of the first side holes comprises two first side holes, and the two first side holes are oppositely arranged along the radial direction of the cannula body. According to the cannula for extracorporeal circulation, the first side holes are divided into two groups, the two groups of the first side holes are distributed at intervals along the axial direction of the cannula body, each group of the first side holes comprises three first side holes, and the three first side holes are distributed at equal intervals along the circumferential direction of the cannula body. According to the cannula for extracorporeal circulation, the distance between two adjacent groups of first side holes along the axial direction of the cannula body is not less than 2mm and not more than 10mm. According to the cannula for extracorporeal circulation of the present invention, the first interval is not less than 5mm and not more than 50mm. The cannula for extracorporeal circulation according to the present invention, the cannula body further comprises a plurality of second side holes; The plurality of second side holes are arranged between the first opening area and the second end of the cannula body, the plurality of second side holes are divided into a plurality of groups, the plurality of groups of second side holes are arranged at intervals along the axial direction of the cannula body, and each group of second side holes comprises a plurality of second side holes arranged at intervals along the circumferential direction of the cannula body. According to the cannula for extracorporeal circulation, the distance between two adjacent groups of second side holes along the axial direction of the cannula body is not less than 25mm and not more than 50mm; And/or the number of the groups of groups, The distance between the group of second side holes and the first side holes closest to the first end of the cannula body is not less than 25mm and not more than 50mm. According to the cannula for extracorporeal circulation, the axial direction of the first side hole and the axial direction of the cannula body are arranged at an angle; And/or the number of the groups of groups, The axial direction of the second side hole and the axial direction of the cannula body are arr