Search

CN-121987941-A - Multi-balloon catheter

CN121987941ACN 121987941 ACN121987941 ACN 121987941ACN-121987941-A

Abstract

The invention discloses a multi-balloon catheter which is suitable for being placed in a descending aorta and arranged close to a renal artery tube, and comprises a catheter body and at least three fixed balloons which are communicated with the periphery of the catheter body and are arranged at intervals, wherein an inflatable cavity communicated with at least one fixed balloon is arranged in the catheter body, the three fixed balloons are axially arranged along the catheter body, each of the three fixed balloons has an expanded state and a contracted state, and the diameter of each fixed balloon in the expanded state is 8-12 mm. So set up, through setting up three fixed sacculus on the pipe body interval, can form the segmentation contact to descending arterial tube to effectively disperse the whole pressure of power pipe, can also reduce the risk of plaque grinding sacculus by a wide margin. The expansion diameter of the three fixed balloons is 8mm-12mm, compared with the expansion of the conventional balloons, the three fixed balloons are obviously reduced, and the expansion diameter of the three fixed balloons is only 60% -80% of that of the conventional balloons, so that the friction between the balloons and plaque in an active vessel can be effectively avoided, and the internal stenosis of a tube is prevented from being blocked.

Inventors

  • XU BO
  • HAO XING
  • JIA ZAISHEN

Assignees

  • 首都医科大学附属北京安贞医院

Dates

Publication Date
20260508
Application Date
20260324

Claims (10)

  1. 1. A multi-balloon catheter is characterized by comprising a catheter body and at least three fixed balloons which are communicated with the periphery of the catheter body and arranged at intervals, wherein an inflatable cavity communicated with at least one fixed balloon is arranged in the catheter body, the three fixed balloons are axially arranged along the catheter body, each fixed balloon has an expanded state and a contracted state, and the diameter of each fixed balloon in the expanded state is 8-12 mm.
  2. 2. The multi-balloon catheter according to claim 1, wherein three of the fixed balloons comprise a first balloon (1), a second balloon (2) and a third balloon (3) which are sequentially arranged from the distal end to the proximal end of the catheter body, the distal end of the catheter body is further provided with a head end (4), and the head end (4) is fixed with the distal end of the first balloon (1).
  3. 3. The multi-balloon catheter according to claim 2, wherein the expanded diameters of the first balloon (1), the second balloon (2), and the third balloon (3) are uniform.
  4. 4. A multi-balloon catheter according to claim 2, wherein the expanded diameter of the first balloon (1) is smaller than the expanded diameter of the second balloon (2), the expanded diameter of the second balloon (2) being smaller than the expanded diameter of the third balloon (3).
  5. 5. The multi-balloon catheter according to claim 4, wherein the expanded diameters of the first balloon (1), the second balloon (2), and the third balloon (3) each gradually increase from the distal end to the proximal end.
  6. 6. A multi-balloon catheter according to claim 2, wherein the expanded diameter of both the first balloon (1) and the third balloon (3) is larger than the expanded diameter of the second balloon (2).
  7. 7. A multi-balloon catheter according to claim 2, wherein the first balloon (1), the second balloon (2) and the third balloon (3) are sequentially communicated, and an inflation lumen communicated with one of the fixed balloons is provided in the catheter body.
  8. 8. The multi-balloon catheter according to claim 2, wherein the first balloon (1), the second balloon (2) and the third balloon (3) are sequentially communicated, and three inflation chambers respectively communicated with the first balloon (1), the second balloon (2) and the third balloon (3) are arranged in the catheter body.
  9. 9. The multi-balloon catheter according to claim 2, wherein the first balloon (1), the second balloon (2) and the third balloon (3) are independently arranged at intervals on the periphery of the catheter body, and three inflating chambers respectively communicated with the first balloon (1), the second balloon (2) and the third balloon (3) are arranged in the catheter body.
  10. 10. The multi-balloon catheter of claim 9, wherein two adjacent fixed balloons are 5mm-15mm apart.

Description

Multi-balloon catheter Technical Field The invention relates to the technical field of medical instruments, in particular to a multi-balloon catheter. Background Modern extracorporeal circulation and mechanical circulation auxiliary technology are mature, and an auxiliary circulation device represented by the aortic balloon counterpulsation is widely applied to clinical scenes such as cardiogenic shock, high-risk coronary intervention, heart postoperative hypocardiac hemorrhage syndrome and the like, and the auxiliary support of the heart is realized through rhythmic inflation and deflation of the aortic balloon. However, in clinical long-term application, the safety risk brought by local aortic lesion is increasingly prominent, wherein the conditions of degenerative change, atherosclerosis plaque, local lumen stenosis or intima smoothness and the like exist on part of the aortic wall of a patient, particularly in the descending aortic segment in the balloon counterpulsation working area, plaque texture is hard and surface irregularities, in the traditional balloon counterpulsation working mode, the balloon is required to repeatedly and periodically expand and contract in the aorta, continuous friction, extrusion and scraping can be carried out on the outer wall of the balloon and the hardened plaque and the narrow tube wall in the long-term movement process, on one hand, the hard plaque can directly abrade and cut the balloon body to cause balloon rupture, air leakage and failure, on the other hand, local stenosis can limit the normal expansion of the balloon, reduce counterpulsation effect, even cause local pressure abnormal rise due to expansion limitation, further exacerbate the risks of plaque injury, plaque fall and balloon damage, and finally possibly cause serious safety events such as circulatory support failure, aortic injury, thromboembolism and hemorrhage. At present, a safe catheter structure which can be stably positioned at an aortic lesion section, avoid repeated friction with plaques and does not depend on counterpulsation action is lacking clinically, and risks such as plaque abrasion saccule and saccule rupture are difficult to effectively avoid in an extracorporeal circulation supporting process. Disclosure of Invention Therefore, the invention aims to solve the problem that the balloon is easy to rupture due to plaque abrasion in an arterial vessel under long-time application of the balloon for aortic counterpulsation in the prior art, thereby providing a multi-balloon catheter. In order to solve the technical problems, the technical scheme of the invention is as follows: The multi-balloon catheter is suitable for being placed in a descending aorta and arranged close to a renal artery tube, and comprises a catheter body and at least three fixed balloons which are communicated with the periphery of the catheter body at intervals, wherein an inflatable cavity which is communicated with at least one fixed balloon is arranged in the catheter body, the three fixed balloons are axially arranged along the catheter body, the three fixed balloons are in an expanded state and a contracted state, and the diameter of each fixed balloon in the expanded state is 8-12 mm. Further, the three fixed balloons comprise a first balloon, a second balloon and a third balloon which are sequentially arranged from the distal end to the proximal end of the catheter body, the distal end of the catheter body is further provided with a head end, and the head end is fixed with the distal end of the first balloon. Further, the first balloon, the second balloon, and the third balloon have uniform expanded diameters. Further, the expanded diameter of the first balloon is smaller than the expanded diameter of the second balloon, which is smaller than the expanded diameter of the third balloon. Further, the expansion diameters of the first balloon, the second balloon and the third balloon are gradually increased from the distal end to the proximal end. Further, the expanded diameters of the first balloon and the third balloon are both greater than the expanded diameter of the second balloon. Further, the first balloon, the second balloon and the third balloon are sequentially communicated, and an inflation cavity communicated with one of the fixed balloons is arranged in the catheter body. Further, the first balloon, the second balloon and the third balloon are sequentially communicated, and three inflation cavities which are respectively communicated with the first balloon, the second balloon and the third balloon are arranged in the catheter body. Further, the first balloon, the second balloon and the third balloon are independently arranged at intervals on the periphery of the catheter body, and three inflation cavities which are respectively communicated with the first balloon, the second balloon and the third balloon are arranged in the catheter body. Further, the interval between two adjacent fixed balloons is 5mm-1