CN219185524U

CN219185524U - Double-balloon microcatheter with side holes

Info

Publication number: CN219185524U
Application number: CN202320189111.6U
Authority: CN
Inventors: 肖迦一
Original assignee: Changsha Jinwei Medical Technology Co ltd
Current assignee: Changsha Jinwei Medical Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-16
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a double-balloon microcatheter with side holes, which comprises a microcatheter body, wherein a first channel and a second channel are arranged in the microcatheter body, the first channel is used as an embolic medicine and guide wire channel, the second channel is used as a balloon filling channel, the first channel is positioned in the center of the microcatheter body and penetrates through the front end and the rear end of the microcatheter body, a second opening is positioned on the side wall of the microcatheter body, and the two balloons are arranged in the distal direction of the microcatheter body and are communicated with the second channel; a side hole is arranged on the side wall of the microcatheter body between the two saccules, the side hole is used as the front end opening of a medicine channel in a channel I, a valve is arranged at the far end of the channel I, and a channel matched with the guide wire in size is arranged on the valve. The double-balloon microcatheter with the side holes provided by the utility model adopts a valve structure for plugging, integrates a guide wire cavity and an injection cavity into a whole, accurately positions the side holes for targeting the blood vessel, and has the advantages of simple structure and convenience in operation.

Description

Double-balloon microcatheter with side holes

Technical Field

The utility model particularly relates to a double-balloon microcatheter with side holes, which can be used in embolism operation of tumor patients.

Background

The hepatic arterial embolism chemotherapy is to directly inject the medicine loaded by the embolic agent into the blood supply artery of the tumor through the blood vessel by utilizing the guide wire catheter technology, and the embolic agent can block the blood supply of the tumor, so that the tumor is ischemic and anoxic; simultaneously, the loaded medicine is slowly released, thereby achieving the purpose of continuous treatment.

With the improvement of embolic materials in recent years, part of patients can select hepatic arterial embolism for hepatobiliary cell cancer or hepatic metastasis cancer, however, the hepatic arterial embolism technology has great heterogeneity in clinical application, because besides the disease itself factors, whether tumor blood supply arterial cannulas can be accurately selected.

By image evaluation of preoperative liver tumor, after the range and blood supply of the tumor are defined by intraoperative radiography, the tumor blood supply artery is selectively cannulated, and then the embolic agent or the drug is injected into the tumor blood supply vessel. The general tumor is supplied with multiple blood supplies, and the purpose can be achieved for the conventional microcatheter for the rich blood supply, but the conditions of very fine partial blood vessels, obvious distortion and large vascular angulation are frequently met, the conventional microcatheter is difficult to enter, or normal vascular embolism which is caused by backflow or unavoidable is frequently generated when medicine/embolic agent is injected in operation, so that the medicine or embolic agent enters normal liver tissues, and sometimes the amount of the medicine entering the normal liver tissues is large, so that the medicine which effectively enters the tumor tissues is less, the embolism is incomplete, the needed tumor tissues cannot be effectively controlled, and the liver function injury is aggravated due to excessive medicine in the normal tissues. To solve the above problems, balloon microcatheters may be selected. The balloon microcatheter can effectively prevent the embolic agent from flowing back, so that the embolism is more thorough and safer.

However, the balloon microcatheter in the prior art generally adopts a three-cavity design, has a complex structure, can not accurately position a target blood vessel, realizes accurate injection, and has poor universality.

Disclosure of Invention

The utility model provides a double-balloon microcatheter with side holes, which is simple in structure and convenient to use by improving the existing balloon microcatheter, realizes accurate injection, saves operation time and reduces extra medical injuries.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the double-balloon microcatheter with the side holes comprises a microcatheter body, wherein a first channel and a second channel are arranged in the microcatheter body, the first channel is used as an embolic medicine and guide wire channel, the second channel is used as a balloon filling channel, the first channel is positioned in the center of the microcatheter body and penetrates through the front end and the rear end of the microcatheter body, a second opening is positioned on the side wall of the microcatheter body, and the two balloons are arranged in the distal direction of the microcatheter body and are communicated with the second channel; a side hole is arranged on the side wall of the microcatheter body between the two saccules, the side hole is used as the front end opening of a medicine channel in the channel I, a valve is arranged at the far end of the channel I, a channel matched with the guide wire in size is arranged on the valve, and the valve can prevent the embolic medicine from passing through.

Preferably, the proximal end of the microcatheter body is provided with a Y connector which is a 6% luer taper connector and is respectively arranged at the opening ends of the first channel and the second channel.

Preferably, the distal end of the microcatheter body is a hollow conical head, the conical head is communicated with the first channel, a valve is arranged in the hollow cavity, the center of the valve is symmetrically provided with a notch, and the notch is used for a guide wire to pass through but the embolic medicine cannot pass through.

Preferably, the first marking layer is arranged at the balloon, and is made of development materials such as platinum iridium alloy, gold, tantalum alloy and the like, is clearly visible under X-rays and is used for positioning the balloon during operation.

Preferably, the side hole is provided with a second marking layer, and the material is a developing material such as platinum iridium alloy, gold, tantalum alloy and the like, is clearly visible under X-ray, and is used for injection positioning of embolic drugs.

Preferably, the outlet of the side hole protrudes out of the side wall of the micro-catheter body, and the caliber of the side hole gradually changes from large to small.

The utility model has the beneficial effects that:

by adopting the technical scheme, the valve plug is arranged, so that the guide wire cavity and the injection cavity are combined into a whole, the structure is simple, and the operation is convenient; the side hole ring is made of developing materials, and is clearly visible under X-rays, so that the side hole in the operation can be used for accurately positioning the target blood vessel, the accurate injection is realized, the operation time is saved, and the extra medical injury is reduced; the side hole is provided with a step small hole with gradually changed caliber, so that the injection is more accurate and is more suitable for targeted vascular medication with smaller size; through the cooperation of two sacculus and side opening, except liver cancer, can also be applicable to multiple condition in a flexible way, the commonality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art and the advantageous effects of the present utility model, the drawings required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other structures may be obtained according to the structures shown in the drawings without inventive effort to those skilled in the art.

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is a cross-sectional view at A-A in fig. 2.

Fig. 4 is a schematic diagram of the operation of the present utility model.

Fig. 5 is a schematic view of a part of the structure of the second embodiment.

Reference numerals illustrate: 1-Y joint, 2-strain buffer sleeve, 3-tube body, 4-balloon I, 5-side hole, 6-balloon II, 7-tip, 8-guide wire and drug channel, 9-balloon filling channel, 10-tube body inner layer, 11-tube body middle layer, 12-tube body outer layer, 13-labeling layer A, 14-side hole ring, 15-labeling layer B, 16-valve;

102-targeted blood vessels, 104-non-targeted blood vessels;

5' -side hole.

Detailed Description

Specific examples of the utility model:

in the first embodiment, as shown in fig. 1 to 4, the double-balloon microcatheter with side holes in this embodiment comprises a Y-joint 1, a strain buffer sleeve 2, a tube body 3, a first balloon 4, a side hole 5, a second balloon 6, a tip 7, a valve 16, and the like.

The double-balloon microcatheter with the side holes is characterized in that a first channel and a second channel are arranged in the tube body 3, the first channel is used as a guide wire and a drug channel 8, the second channel is used as a balloon filling channel 9, the first channel is positioned at the center of the tube body of the microcatheter and penetrates through the front end and the rear end of the tube body, an opening of the second channel is positioned on the side wall of the tube body, and two balloons (a first balloon 4 and a second balloon 6 in the figure) are arranged in the distal end direction of the tube body and are communicated with the second channel, so that a closed embolism dosing section is formed after filling, the embolism is ensured to be sufficiently efficient, the first balloon 4 prevents medicament from flowing back, the second balloon 6 prevents medicament from flowing to the distal end and avoids damaging normal blood vessels; a side hole is arranged on the side wall of the tube body between the two saccule, the side hole is used as the front end opening of the medicine channel in the channel I, the far end of the channel I is provided with a valve, the valve is provided with a channel matched with the guide wire in size, and the valve can prevent the embolic medicine from passing through.

The proximal end of the tube body is provided with a Y joint 1 which is a 6% luer taper joint and is respectively arranged at the opening ends of a first channel and a second channel by adopting an injection molding process, and the Y joint is connected with external drug administration equipment and a balloon pressure pump to realize embolic drug administration and balloon filling; the Y joint and the pipe body are connected with each other by a strain buffer sleeve 2 made of high polymer materials such as polyolefin or polyurethane elastomer, and the material is soft and plays a role in stress release and is adhered to the joint by assembly.

The distal end of the microcatheter is a hollow tip 7, the tip 7 is communicated with the first channel, a valve 16 is arranged in the hollow cavity, a cross-shaped incision is symmetrically formed in the center of the valve, and the cross-shaped incision allows a guide wire to pass through but the embolic medicine cannot pass through.

The balloon is provided with a first marking layer, a first marking layer a13 and a first marking layer b15 are respectively arranged at the two balloon positions, the marking layers are made of development materials such as platinum iridium alloy, gold, tantalum alloy and the like, are clearly visible under X-rays, and are used for positioning the balloon positions in operation.

The side hole is provided with a side hole ring 14 as a second marking layer, the side hole ring 14 is made of development materials such as platinum iridium alloy, gold, tantalum alloy and the like, is clearly visible under X-rays, and is used for perfusion positioning of embolic medicines.

Referring to fig. 5, a part of the structure diagram of the second embodiment of the present utility model is different from the first embodiment only in the structure of the side hole 5', wherein the outlet of the side hole 5' protrudes out of the side wall of the microcatheter body, the caliber of the side hole gradually changes from large to small, the injection is more accurate, and the present utility model is more suitable for targeted vascular drug administration with smaller size.

According to the three-layer structure design of the pipe body, the inner layer 10 of the pipe body is made of high molecular polymers such as PTFE, the middle layer 11 of the pipe body is made of braided reinforcing layers such as 304 stainless steel, nickel titanium wires and the like, the outer layer 12 of the pipe body is made of high molecular polymers such as nylon, a hydrophilic coating layer is further coated on the surface of the outer layer, a balloon filling channel is formed in the middle of the outer layer, the head end of a catheter is soft and noninvasive, the hardness of the pipe body is gradually hardened from the far end to the near end, and the good support, the operability, the lubricity and the bending resistance of the catheter are ensured. The conduit uses a rheometric tube. The design of the double saccule with the side hole of the microcatheter can accurately deliver medicine to the target blood vessel, so that the treatment is more thorough; the double saccule plugging can effectively prevent medicine from flowing back or flowing to normal tissues or non-target blood vessel 104 embolism, reduce unnecessary injury, make treatment safer, the tip design valve plugging allows 0.014' guide wire to pass through, facilitates the quick in-place passing of the catheter along the guide wire and does not allow medicine to pass through, realizes injection of medicine from the side hole to the target blood vessel 102, has a simple structure, adopts developing materials for the side hole ring, is clearly visible under X rays, facilitates accurate positioning of the target blood vessel 102 by the side hole in operation, realizes accurate injection, saves operation time, and reduces additional medical injury.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The double-balloon microcatheter with the side holes is characterized by comprising a microcatheter body, wherein a first channel and a second channel are arranged in the microcatheter body, the first channel is used as an embolic medicine and guide wire channel, the second channel is used as a balloon filling channel, the first channel is positioned in the center of the microcatheter body and penetrates through the front end and the rear end of the microcatheter body, a second opening is formed in the side wall of the microcatheter body, and the two balloons are arranged in the distal direction of the microcatheter body and are communicated with the second channel; a side hole is arranged on the side wall of the microcatheter body between the two saccules, the side hole is used as the front end opening of a medicine channel in a channel I, a valve is arranged at the far end of the channel I, and a channel matched with the guide wire in size is arranged on the valve.

2. The side hole double balloon microcatheter of claim 1 wherein the proximal end of the microcatheter body is provided with a Y-fitting, a 6% luer taper fitting, disposed at the open ends of the first and second channels, respectively.

3. The side hole double balloon microcatheter of claim 2 wherein the distal end of the microcatheter body is a hollow conical head, the conical head is in communication with the first channel, a valve is disposed in the hollow cavity, and the center of the valve is symmetrically notched.

4. A dual balloon microcatheter with side holes as in claim 3, wherein a first marker layer is provided at the balloon.

5. The double balloon microcatheter with side hole of claim 4 wherein the side hole is provided with a second indicator layer.

6. The side hole double balloon microcatheter of claim 5 wherein the side hole exit protrudes from the side wall of the microcatheter body and the side hole bore tapers from large to small.