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CN-122004989-A - Head end adjustable bending plugging sacculus microcatheter

CN122004989ACN 122004989 ACN122004989 ACN 122004989ACN-122004989-A

Abstract

The invention discloses a head end bending-adjustable plugging saccule micro-catheter, and belongs to the technical field of medical appliances. The invention sequentially comprises a balloon catheter head end, a catheter distal bending section, a proximal supporting section and a handle from far to near, wherein the catheter distal bending section is provided with a distal balloon, the balloon catheter head end proximal end is connected with the distal end of a driving wire a, the catheter distal bending section is connected with the distal end of a driving wire c at the position corresponding to the distal balloon distal end, the proximal ends of the driving wire a and the driving wire b are connected with a driving device a, and the proximal end of the driving wire c is connected with a driving device b. The three functions of active bending adjustment, saccule plugging and drug delivery are integrated into one micro-catheter, so that the operation is simplified, the replacement of instruments in the operation is reduced, and the operation risk and cost are reduced.

Inventors

  • DONG HEYAN
  • LIU MIAOMIAO
  • HU YIPING

Assignees

  • 辽宁垠艺生物科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The head end adjustable bending plugging balloon micro-catheter consists of a balloon catheter head end (1), a catheter far-end bending section (3), a near-end supporting section (4) and a handle (5) from far to near in sequence, wherein the catheter far-end bending section (3) is provided with a far-end balloon (2), and the head end adjustable bending plugging balloon micro-catheter is characterized in that the far end of the balloon catheter head end (1) is connected with the far end of a driving wire a (9-1), the far-end of the catheter far-end bending section (3) is connected with the far end of a driving wire c (9-3) at the far end position corresponding to the far-end balloon (2), the near ends of the driving wire a (9-1) and the driving wire b (9-2) are connected with a driving device a (12-1), and the near end of the driving wire c (9-3) is connected with the driving device b (12-2).
  2. 2. The head end adjustable bend blocking balloon microcatheter according to claim 1, wherein the driving means a (12-1) and the driving means b (12-2) each comprise a knob a (12-6-1) and a knob groove a, the driving wire a (9-1) or the driving wire c (9-3) is wound proximally around the knob a (12-6-1), the knob a (12-6-1) being located in the knob groove a; The rotary column groove a in the driving device a (12-1) is arranged at the top of the rotary column a (12-6-1), the rotary column b (12-6-1) is wound on the proximal end of the driving wire b (9-2), and the rotary column b (12-6-1) is positioned in the rotary column groove b.
  3. 3. The head end adjustable bend plugging balloon microcatheter according to claim 2, wherein the screw column a (12-6-2) and the screw column b (12-6-1) are axially provided with limit grooves (12-7), the screw column groove a and the screw column groove b are provided with locking mechanisms (12-5) matched with the limit grooves (12-7), and the screw column a (12-6-2) and the screw column b (12-6-1) are of a threaded structure.
  4. 4. The head end adjustable bending plugging balloon microcatheter according to claim 2, wherein the top of the rotary column a (12-6-1) is provided with an indication mark (12-4) and an indication mark (12-3), the extension and retraction range of the driving wire b (9-2) and the driving wire c (9-3) of the driving wire a (9-1) is 0-50mm, and the bending angle of the corresponding catheter is 0-90 degrees.
  5. 5. The head end adjustable bend blocking balloon microcatheter according to claim 1, wherein the distal balloon (2) is in close proximity to or partially covers the catheter distal bend section (3), the distal balloon (2) being a super-compliant balloon made of polyurethane or medical grade silicone rubber.
  6. 6. The head-end adjustable bending plugging balloon microcatheter according to claim 1, wherein the catheter proximal support section (4) and the catheter distal bending section (3) are composite multi-lumen tubes comprising an inner liner (13), a reinforcing layer (14) and an outer tube (15) coaxially in order from inside to outside.
  7. 7. The head end adjustable bend plugging balloon microcatheter according to claim 6, wherein a guide wire/drug delivery lumen (13-1) is provided in the inner liner (13); an filling sacculus cavity channel (13-2), a driving wire cavity channel a (15-1), a driving wire cavity channel b (15-2) and a driving wire cavity channel c (15-3) are arranged in the outer layer tube (15) in the proximal support section (4) of the catheter; The driving wire a (9-1), the driving wire b (9-2) and the driving wire c (9-3) are respectively positioned in the driving wire cavity channel a (15-1), the driving wire cavity channel b (15-2) and the driving wire cavity channel c (15-3); the outer tube (15) has a gradually decreasing hardness from the proximal end to the distal end; the reinforcing layer (14) is provided with a reinforcing structure which is a coiled spring wire, a braided wire or a combination of the coiled spring and the braided wire.
  8. 8. The head end adjustable bend plugging balloon microcatheter according to claim 6, wherein the outer surface of the reinforcement layer (14) of the catheter distal bend section (3) is provided with a balloon proximal end fixing ring/marking ring (8-3) and a balloon distal end fixing ring/marking ring (8-2), and the balloon catheter head end (1) is provided with a catheter head end fixing ring/marking ring (8-1); The driving wire a (9-1) and the driving wire b (9-2) are connected with a fixed ring/marking ring (8-1) at the head end of the catheter, and the driving wire c (9-3) is connected with the fixed ring/marking ring (8-2) at the far end of the balloon.
  9. 9. The head end adjustable bend blocking balloon microcatheter of claim 7, wherein the catheter outer surface is coated with a lubricious coating, and wherein the inner walls of guidewire/drug delivery lumen (13-1), inflation balloon lumen (13-2), drive wire lumen a (15-1), drive wire lumen b (15-2), and drive wire lumen c (15-3) are coated.
  10. 10. The head-end adjustable bend blocking balloon microcatheter according to claim 1, wherein a balloon filling interface (6) and a guide wire/drug delivery through interface (7) are provided at the proximal end of the handle (5), the balloon filling interface (6) is in communication with the filling balloon lumen (13-2), and the guide wire/drug delivery through interface (7) is in communication with the guide wire/drug delivery lumen (13-1).

Description

Head end adjustable bending plugging sacculus microcatheter Technical Field The invention belongs to the technical field of medical instruments, and particularly relates to a head end bending-adjustable plugging sacculus microcatheter. Background Microcatheters are key instruments for performing super-selective endovascular treatments in the field of interventional radiology. The plugging saccule micro-catheter is based on the traditional micro-catheter, a saccule which can be inflated repeatedly is arranged at a certain distance from the head end of the catheter, the inflated saccule is anchored at the near-heart end of a target blood vessel, and the blood flow of the target blood vessel can be blocked to play a role in preventing the backflow of embolic substances, so that accurate embolism is realized, the treatment effect is improved, and complications are reduced. The device is widely applied to the fields of hepatic arterial chemoembolization, bronchial arterial embolization for treating hemoptysis, prostatic arterial embolization and the like. Chinese patent CN222033348U discloses a super-compliant occlusion balloon catheter whose catheter tip is passive, relying on pre-shaping or guiding by a guidewire to traverse a tortuous vascular path. In clinical practice, the patients often face the challenges of large tortuosity of blood vessels, the branching angle of the branches being in the way of boring, atherosclerosis plaques and the like. The passivity of existing catheters results in insufficient maneuverability, passability and directionality when passing through such complex anatomy, often resulting in prolonged surgical time, increased perspective time, increased surgical risk, and even surgical failure. It follows that there are a number of shortcomings with existing microcatheters, one of the biggest problems being the lack of active tip control. Therefore, there is a need in the clinic for a plugging balloon microcatheter capable of providing active head end steering control to cope with complex vascular anatomy and improve the success rate and efficiency of surgery. Disclosure of Invention In view of the above, the invention aims to provide a head end adjustable bending plugging balloon micro-catheter, which integrates three functions of active bending adjustment, balloon plugging and drug delivery into one micro-catheter, thereby simplifying operation, reducing instrument replacement in operation and reducing operation risk and cost. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a head end adjustable bending plugging balloon micro-catheter which sequentially comprises a balloon catheter head end, a catheter far-end bending section, a near-end supporting section and a handle from far to near, wherein the catheter far-end bending section is provided with a far-end balloon, the near end of the balloon catheter head end is connected with the far end of a driving wire a, the catheter far-end bending section is connected with the far end of a driving wire c at the position corresponding to the far end balloon far end, the near ends of the driving wire a and the driving wire b are connected with a driving device a, and the near end of the driving wire c is connected with a driving device b. Based on the technical scheme, the driving device a and the driving device b comprise a rotary column a and a rotary column groove a, the driving wire a or the driving wire c is wound on the rotary column a at the proximal end, and the rotary column a is positioned in the rotary column groove a; The rotary column groove a in the driving device a is arranged at the top of the rotary column a, the proximal end of the driving wire b is wound on the rotary column b, and the rotary column b is positioned in the rotary column groove b. Based on the technical scheme, further, limit grooves are formed in the axial directions of the rotary column a and the rotary column b, locking mechanisms matched with the limit grooves are arranged in the rotary column groove a and the rotary column groove b, and the rotary column a and the rotary column b are of thread structures. The screw column a and the screw column b of the screw structure mainly serve as a winding wheel, the driving wire is wound on the screw column, and the driving wire stretches and contracts through rotating the screw column, so that the head end is bent. When the rotary column a or the rotary column b just rotates to the position that the limit groove corresponds to the locking mechanism, the corresponding driving wire is locked, so that the head end rebounding due to the pulsation of a blood vessel or external force in the operation process can be avoided. The operation module for controlling the driving wires exceeding the single driving wire comprises two or more rotary columns in the inner structure, and the rotary columns are in a structure surrounded by the same circle cen