Novel porous balloon catheter

Abstract

The utility model relates to the technical field of balloon catheter equipment, in particular to a novel porous balloon catheter, which solves the technical problem that in the prior art, a special balloon catheter is lacked for carrying out delayed treatment measures on local parts of extrahepatic bile duct tumors, and specifically comprises a columnar balloon arranged on a catheter main body, small holes are uniformly distributed in the periphery of the far end of the columnar balloon; the diameter of each small hole is 10 microns; the two sets of spherical balloons are arranged on the catheter body and located on the two sides of the columnar balloon respectively; and the two groups of spherical balloons have the same volume in a preset flushing state. The liquid medicine can be injected to the local part of the bile duct tumor through the columnar balloon; the spherical balloons on the two sides of the columnar balloon can expand to block the bile duct after being inflated, injected medicine is prevented from flowing to the non-lesion bile duct, and therefore damage of the medicine to the non-lesion bile duct is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of balloon catheter equipment, in particular to a novel porous balloon catheter. Background Art

[0002] In current practice, early diagnosis of extrahepatic bile duct tumors is difficult, and surgical resection is often not possible when a clear diagnosis is made. The radical surgical resection rate is low, and the prognosis is extremely poor, with an average 5-year overall survival (OS) rate of less than 10%. Although systemic chemotherapy (such as gemcitabine + cisplatin regimen) is the first-line treatment for unresectable cases, the initial efficacy is poor, and the median overall survival of this regimen is reported to be about 1 year. In addition, the current targeted or immunotherapy is also ineffective for extrahepatic bile duct tumors.

[0003] In addition, even if the bile duct lesions are resectable, they often require radical resection, which is very invasive, such as liver resection or pancreaticoduodenectomy. However, because extrahepatic bile duct tumors are more common in the elderly, they are often unable to undergo surgical treatment due to advanced age and / or coexisting underlying diseases. Moreover, for patients who are not suitable for surgery, systemic treatments such as chemotherapy are often contraindicated.

[0004] In recent years, photodynamic therapy and intraluminal radiofrequency ablation via ERCP or PTCD have been applied to extrahepatic bile duct tumors. Although the potential of these treatment modalities is certain, no study has established photodynamic therapy and / or intraluminal radiofrequency ablation as the standard local treatment for extrahepatic bile duct tumors.

[0005] Based on the above, the existing technology first lacks delay measures. The existing technology can use balloon catheters to inject drugs such as anhydrous alcohol and gemcitabine into the local extrahepatic bile duct tumor, thereby achieving the effect of local treatment of extrahepatic bile duct tumors, improving the quality of life of patients, and prolonging the survival of patients;

[0006] However, the prior art lacks a balloon catheter specifically designed for this measure so as to enable adaptive application. Utility Model Content

[0007] The utility model aims to solve the technical problem of the lack of a dedicated balloon catheter in the prior art for local delayed treatment of extrahepatic bile duct tumors, and provides a novel porous balloon catheter.

[0008] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0009] A novel porous balloon catheter has a catheter body with a built-in guide wire, including:

[0010] A columnar balloon, which is arranged on the catheter body, and small holes are evenly distributed on the outer circumference of the distal end of the columnar balloon;

[0011] The diameter of the small hole is 10 μm;

[0012] Two groups of spherical balloons are arranged on the catheter body and are respectively located on both sides of the columnar balloon;

[0013] The two groups of spherical balloons have the same volume under the preset flushing state.

[0014] Specifically, the plurality of small holes are arranged within a range of two thirds from the distal end to the proximal end of the cylindrical balloon.

[0015] Specifically, the catheter body comprises:

[0016] An inner tube portion, which is used for internally connecting the guide wire;

[0017] The outer tube part is used to connect the columnar balloon and the spherical balloon to form a flushing gap.

[0018] Specifically, the spherical balloon comprises:

[0019] A first spherical balloon is located at the distal end of the catheter body and has an end closure portion.

[0020] Specifically, the spherical balloon comprises:

[0021] The second spherical balloon is located at the proximal end of the catheter body and has a connecting component, which is used for connecting an injection device.

[0022] Specifically, the connecting component includes:

[0023] an inner tube integrally connected to the inner tube portion;

[0024] an outer tube integrally connected to the outer tube portion;

[0025] The inner tube is connected to a closed end;

[0026] The outer tube is integrally connected to an access tube.

[0027] Specifically, the access pipe and the closed end form a joint portion, and the joint portion is used to connect to a connecting pipe of an injection device.

[0028] Specifically, the outer tube is provided with an injection and outlet interface, and the injection and outlet interface is connected with the outer tube and the inner tube to form an annular space;

[0029] The injection outlet interface is used to connect to the access end of the auxiliary injector.

[0030] The utility model has the following beneficial effects:

[0031] The advantage of this technical solution is that liquid drugs can be injected into the local area of ​​the bile duct tumor through the columnar balloon;

[0032] The spherical balloons on both sides of the columnar balloon can expand and block the bile duct after being inflated, preventing the injected drug from flowing into the non-diseased bile duct, thereby avoiding the drug from damaging the non-diseased bile duct;

[0033] The injection outlet port on the catheter at the proximal end of the columnar balloon can withdraw the injected residual drug to avoid damage to the non-lesioned bile duct by the residual drug. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Figure 1 It is a schematic diagram of the structure of the utility model;

[0036] Figure 2 It is a partial enlarged view of the far end of the utility model;

[0037] Figure 3 It is a partial enlarged view of the proximal end of the utility model.

[0038] The reference numerals in the figures indicate:

[0039] Catheter body 1, built-in guide wire 2, columnar balloon 10, small hole 11, spherical balloon 20;

[0040] Inner tube 101, outer tube 102, punching gap 103, first spherical balloon 201, end sealing portion 210, second spherical balloon 202, injection device 4, connecting component 30;

[0041] Inner tube 31 , outer tube 32 , closed end 33 , access tube 34 , joint 35 , injection and outlet interface 40 , annular space 301 , and auxiliary injector 5 . DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model; it should be noted that in this application, for the convenience of description, the "left side" in the current view is the "first end", the "right side" is the "second end", the "upper side" is the "first end", and the "lower side" is the "second end". The purpose of such description is to clearly express the technical solution, and it should not be understood as an improper limitation on the technical solution of this application.

[0043] The present application relates to a porous balloon catheter, which has a targeted use, that is, it can be introduced into the bile duct or pancreatic duct through ERCP or PTCD, and the drug can be locally injected into the bile duct tumor or pancreatic duct tumor through the catheter, thereby playing a minimally invasive and local treatment role for the bile and pancreatic duct tumor that cannot be removed, and as one of the implementation methods of the delay measure, please refer to the specific technical solution. Figure 1-3 As shown;

[0044] A novel porous balloon catheter, which is the same as a conventional catheter, comprises a catheter body 1, a built-in guide wire 2, and is characterized in that it also comprises:

[0045] The columnar balloon 10 is arranged on the catheter body 1. Small holes 11 are evenly arranged on the outer circumference of the distal end of the columnar balloon 10. The diameter of the small holes 11 is 10 μm. When liquid medicine is injected into the columnar balloon 10, the columnar balloon 10 can begin to expand until it reaches the full size. Subsequently, the liquid medicine in the columnar balloon 10 can gradually seep out of the balloon through the small holes 10, playing the role of local injection.

[0046] Two groups of spherical balloons 20 are arranged on the catheter body 1 and are located on both sides of the columnar balloon 10; there is a spherical or quasi-circular spherical balloon 20 on both sides of the columnar balloon 10, which can also be expanded to block the bile duct and prevent the injected drug from flowing into the non-diseased bile duct.

[0047] The two groups of spherical balloons 20 have the same volume in a preset flushing state;

[0048] In fact, the overall volume of the cylindrical balloon 10 is larger than that of the spherical balloon 20, but in fact, in cross section, the actual contour of the spherical balloon 20 after being punched in will be larger. Figure 1 The display is only for illustration and not the actual status;

[0049] In addition, the principle of the flushing is that since the pressure required for the cylindrical balloon 10 to be flushed is greater than that of the other two spherical balloons 20, the actual flushing process is: due to the existence of the flushing gap 103, the two spherical balloons 20 are inflated first, and as the pressure of the cylindrical balloon 10 continues to increase, the two ends of the cylindrical balloon 10 are inflated and gradually inflated toward the center of the cylindrical balloon 10, and finally the process is completed as shown in the attached figure. Figure 1 The shape of the column shown in .

[0050] In a specific embodiment, see Figure 1-3 As shown; a plurality of small holes 11 are arranged within the range of two-thirds from the distal end to the proximal end of the cylindrical balloon 10.

[0051] In a specific embodiment, see Figure 1-3 As shown; the catheter body 1 includes:

[0052] The inner tube part 101 is used for internally connecting the guide wire 2;

[0053] The outer tube portion 102 is used to connect the columnar balloon 10 and the spherical balloon 20 and form a punching gap 103 .

[0054] In a specific embodiment, see Figure 1-3 As shown; the spherical balloon 20 includes: a first spherical balloon 201, which is located at the distal end of the catheter body 1 and has an end closure portion 210.

[0055] The spherical balloon 20 further includes: a second spherical balloon 202 , which is located at the proximal end of the catheter body 1 and has a connecting component 30 , and the connecting component 30 is used to connect to the injection device 4 .

[0056] In a specific embodiment, see Figure 1-3 As shown; the connecting component 30 includes:

[0057] An inner tube 31, which is integrally connected to the inner tube portion 101;

[0058] The outer tube 32 is integrally connected to the outer tube portion 102;

[0059] The inner tube 31 is connected to a closed end 33;

[0060] The outer tube 32 is integrally connected to an access tube 34 .

[0061] In a specific embodiment, see Figure 1-3 The access tube 34 and the closed end 33 form a joint portion 35, the joint portion 35 is used to connect the injection device 4 to take over.

[0062] In a specific embodiment, see Figure 1-3 As shown; the outer tube 32 is provided with an injection and export interface 40, and the injection and export interface 40 is connected between the outer tube 32 and the inner tube 31 to form an annular space 301; the injection and export interface 40 is used to connect the access end of the auxiliary injector 5.

[0063] The advantage of this technical solution is that the liquid medicine can be injected into the local bile duct tumor through the columnar balloon 10; the improvement trend produced in this way can achieve the purpose of achieving a local treatment effect on the tumor, thereby prolonging the patient's survival period;

[0064] The spherical balloons 20 on both sides of the columnar balloon 10 can expand and block the bile duct after being filled, preventing the injected drug from flowing into the non-lesioned bile duct, thereby avoiding the drug from damaging the non-lesioned bile duct;

[0065] The injection outlet port 40 on the catheter at the proximal end of the columnar balloon 10 can withdraw the injected residual drug to prevent the residual drug from damaging the non-lesioned bile duct.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A novel porous balloon catheter, comprising a catheter body (1) with a built-in guide wire (2), characterized in that: include: A columnar balloon (10) is arranged on the catheter body (1), and small holes (11) are evenly distributed on the outer circumference of the distal end of the columnar balloon (10); The diameter of the small hole (11) is 10 μm; Two groups of spherical balloons (20) are arranged on the catheter body (1) and are respectively located on both sides of the columnar balloon (10); The two groups of spherical balloons (20) have the same volume in a preset flushing state.

2. The novel porous balloon catheter according to claim 1, characterized in that: The plurality of small holes (11) are arranged within a range of two thirds from the distal end to the proximal end of the cylindrical balloon (10).

3. The novel porous balloon catheter according to claim 2, characterized in that: The catheter body (1) comprises: An inner tube portion (101) used for internally connecting the guide wire (2); The outer tube part (102) is used to connect the columnar balloon (10) and the spherical balloon (20) and form a flushing gap (103).

4. The novel porous balloon catheter according to claim 3, characterized in that: The spherical balloon (20) comprises: A first spherical balloon (201) is located at the distal end of the catheter body (1) and has an end sealing portion (210).

5. The novel porous balloon catheter according to claim 4, characterized in that: The spherical balloon (20) comprises: The second spherical balloon (202) is located at the proximal end of the catheter body (1) and has a connecting component (30) for connecting to an injection device (4).

6. The novel porous balloon catheter according to claim 5, characterized in that: The connecting component (30) comprises: An inner tube (31) integrally connected to the inner tube portion (101); an outer tube (32) integrally connected to the outer tube portion (102); The inner tube (31) is connected to a closed end (33); The outer tube (32) is integrally connected to an access tube (34).

7. The novel porous balloon catheter according to claim 6, characterized in that: The access pipe (34) and the closed end (33) form a joint portion (35), and the joint portion (35) is used to connect to the connecting pipe of the injection device (4).

8. The novel porous balloon catheter according to claim 7, characterized in that: The outer tube (32) is provided with an injection and outlet port (40), and the injection and outlet port (40) is connected to the outer tube (32) and the inner tube (31) to form an annular space (301); The injection outlet interface (40) is used to connect to the access end of the auxiliary injector (5).

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