Balloon catheter

Abstract

The utility model discloses a balloon catheter. The balloon catheter comprises an inner tube and an outer tube which are coaxially arranged, an inner cavity of the inner tube serves as a dosing flushing cavity, an inner tube catheter seat is arranged at the near end of the inner tube, an inner cavity of the inner tube catheter seat is communicated with the dosing flushing cavity, a dosing flushing hole is formed in the far end of the inner tube, and the dosing flushing hole is communicated with the dosing flushing cavity; the length of the outer tube is smaller than that of the inner tube, a balloon is arranged on the inner tube section between the far end of the outer tube and the dosing flushing hole, an annular cavity between the outer tube and the inner tube serves as an inflation cavity, the inflation cavity is communicated with an inner cavity of the balloon, an outer tube catheter seat is arranged at the near end of the outer tube, and an inner cavity of the outer tube catheter seat is communicated with the inflation cavity. The balloon catheter is of a double-tube structure, the outer tube is communicated with the balloon to expand the eustachian tube, and the inner tube can be used for flushing and dosing.

Description

Technical Field

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

[0002] In the process of treating Eustachian tube-related diseases, the Eustachian tube needs to be dilated. Currently, a Eustachian tube balloon is often used to dilate the Eustachian tube, but the Eustachian tube balloon cannot clear the secretions in the Eustachian tube. If the secretions in the Eustachian tube need to be cleared, an additional flushing catheter is required to administer medication and flush to clear the secretions, which is inconvenient for doctors to operate.

[0003] In addition, there are balloon catheters that can dilate the Eustachian tube and administer medication and flush. However, they use a single-tube double-lumen structure. The air and liquid supply space of the double-lumen structure is greatly affected by the diameter of the tube body, resulting in insufficient air and liquid supply space.

[0004] In addition, the existing balloon catheter flushing method for the Eustachian tube is to only have an end hole at the end as a drug administration flushing hole. The drug administration flushing method with a drug administration flushing hole at the end has a high drug administration flushing pressure, and there is a high probability that the flushing liquid will enter the tympanic cavity and bring secretions into the tympanic cavity, causing tympanic cavity infection and other problems. Utility Model Content

[0005] In view of at least one shortcoming in the prior art, the present invention provides a balloon catheter.

[0006] The utility model discloses a balloon catheter, comprising: an inner tube and an outer tube coaxially arranged;

[0007] The inner lumen of the inner tube serves as a medication flushing cavity, the proximal end of the inner tube is provided with an inner tube catheter seat, the inner lumen of the inner tube catheter seat is connected to the medication flushing cavity, and the distal end of the inner tube is provided with a medication flushing hole, the medication flushing hole is connected to the medication flushing cavity;

[0008] The length of the outer tube is smaller than that of the inner tube. A balloon is provided on the inner tube section between the distal end of the outer tube and the drug administration flushing hole. The annular cavity between the outer tube and the inner tube serves as an inflation cavity, and the inflation cavity is connected to the inner cavity of the balloon. An outer tube catheter seat is provided at the proximal end of the outer tube, and the inner cavity of the outer tube catheter seat is connected to the inflation cavity.

[0009] As a further improvement of the present invention, the distal inner tube section of the inner tube is a flexible tube section, which has an end hole and a side hole on the side wall, and both the end hole and the side hole serve as drug administration and flushing holes.

[0010] As a further improvement of the present invention, the inner tube catheter seat and the outer tube catheter seat are an integrated structure.

[0011] As a further improvement of the utility model, it also includes: a support tube and a heat shrink tubing;

[0012] The support tube is coaxially sleeved on the outside of the outer tube and the length of the support tube is smaller than that of the outer tube. The heat shrinkable sleeve performs heat shrinkage sealing on the distal end where the catheter seat, the support tube and the outer tube are connected.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The balloon catheter of the utility model has a double-tube structure, the outer tube is connected to the balloon to achieve dilation of the Eustachian tube, and the inner tube can be used for flushing and medication;

[0015] The distal end of the inner tube of the utility model is made of elastic body and has drug administration and flushing holes at the end and side. The side holes divide the pressure of the end holes so that the flushing liquid will not rush into the ear canal, and the flushing and drug administration effect is better, thereby better achieving the flushing and drug administration of the secretions in the Eustachian tube.

[0016] The balloon catheter of the present invention has a double-tube structure rather than a single-tube double-lumen structure, and has more sufficient space for supplying air and liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the balloon catheter disclosed in the present utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] In the picture:

[0020] 1. Inner tube; 1-1. Distal inner tube segment; 2. Outer tube; 3. Support tube; 4. Heat shrink tubing; 5. Inner tube catheter seat; 6. Outer tube catheter seat; 7. Balloon; 8. Medication flushing hole. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] The present invention is described in further detail below with reference to the accompanying drawings:

[0023] like Figure 1 、 2As shown, the utility model provides a balloon catheter, comprising: an inner tube 1, an outer tube 2, a support tube 3, a heat shrink tubing 4, an inner tube catheter seat 5, an outer tube catheter seat 6 and a balloon 7; wherein,

[0024] The inner tube 1 and the outer tube 2 of the present invention are coaxially arranged, and a preset gap is left between the two, and the gap can be 0.1 to 0.3 mm; the length of the outer tube 2 is smaller than the length of the inner tube 1, and the proximal end of the outer tube 2 ( Figure 1 lower end shown) and distal end ( Figure 1 The inner cavity of the inner tube 1 is used as a drug administration and flushing cavity, and the annular cavity between the outer tube 2 and the inner tube 1 is used as an inflation cavity.

[0025] The proximal ends of the inner tube 1 and outer tube 2 of the present invention are inserted into the catheter seat, and the catheter seat includes an integrated inner tube catheter seat 5 and outer tube catheter seat 6, and the material of the inner tube catheter seat 5 and the outer tube catheter seat 6 is polycarbonate. Among them, the inner tube catheter seat 5 is used to connect the syringe for drug administration and flushing. The inner cavity of the inner tube catheter seat 5 is only connected to the drug administration and flushing cavity. The distal end of the inner tube 1 is provided with a drug administration and flushing hole 8, and the drug administration and flushing hole 8 are connected to the drug administration and flushing cavity. Furthermore, the distal inner tube section 1-1 of the inner tube 1 of the present invention is a flexible tube section, and its material can be selected from nylon elastomer; the distal inner tube section 1-1 has an end hole and side holes are opened on the side wall at the same time, and the end hole and side holes are both used as drug administration and flushing holes 8; further, the drug administration and flushing holes 8 on the side wall are evenly distributed in the length direction of the distal inner tube section 1-1 and evenly distributed in the annular direction; when in use, the end hole is pressure-divided by the side hole, so that the flushing liquid will not rush into the ear canal, and the flushing and drug administration effect is better. A balloon 7 is provided on the inner tube section between the distal end of the outer tube 2 and the drug administration flushing hole 8. The distal end of the inflation cavity is only connected to the inner cavity of the balloon 7. The outer tube catheter seat 6 is used to connect the inflation tube. The inner cavity of the outer tube catheter seat 6 is only connected to the inflation cavity.

[0026] The support tube 3 of the present invention is coaxially sleeved on the outside of the outer tube 2 and the length of the support tube 3 is smaller than that of the outer tube 2. The heat shrinkable sleeve 4 performs heat shrinkage sealing on the distal end where the catheter seat, the support tube 3 and the outer tube 2 are connected to prevent air leakage.

[0027] Furthermore, the inner tube of the utility model can adopt a multi-section structure. In addition to the distal inner tube section 1-1 being a flexible tube section of nylon elastomer, the proximal tube section can also adopt a hard tube section or a combination of a stainless steel sea wave tube + a hard tube section. The hard material can be PA material, and the different tube sections are welded and fixed.

[0028] Furthermore, the outer tube 2 of the present invention is a polyamide outer tube, the support tube 3 is a PVC tube, and the heat shrinkable tube 4 is a PVC tube.

[0029] Furthermore, the specifications of the balloon 7 of the present invention are shown in Table 1:

[0030] Table 1

[0031]

[0032] The method of using the utility model is as follows:

[0033] The doctor inserts the balloon catheter into the Eustachian tube and inflates the balloon 7 through the outer tube catheter seat 6. After the balloon 7 is inflated, it stretches the Eustachian tube; when it is necessary to administer medicine to clean the secretions in the Eustachian tube, the doctor injects the medicine or flushing liquid into the inner tube through the syringe on the inner tube catheter seat 5 and sprays it out through the drug administration flushing hole 8 for drug administration and flushing.

[0034] The advantages of the utility model are:

[0035] The balloon catheter of the utility model has a double-tube structure, the outer tube is connected to the balloon to achieve dilation of the Eustachian tube, and the inner tube can be used for flushing and medication;

[0036] The distal end of the inner tube of the utility model is made of elastic body and has drug administration and flushing holes at the end and side. The side holes divide the pressure of the end holes so that the flushing liquid will not rush into the ear canal, and the flushing and drug administration effect is better, thereby better achieving the flushing and drug administration of the secretions in the Eustachian tube.

[0037] The balloon catheter of the present invention has a double-tube structure rather than a single-tube double-lumen structure, and has more sufficient space for supplying air and liquid.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A balloon catheter, characterized in that: include: An inner tube and an outer tube are coaxially arranged; The inner lumen of the inner tube serves as a medication flushing cavity, the proximal end of the inner tube is provided with an inner tube catheter seat, the inner lumen of the inner tube catheter seat is connected to the medication flushing cavity, and the distal end of the inner tube is provided with a medication flushing hole, the medication flushing hole is connected to the medication flushing cavity; The length of the outer tube is smaller than that of the inner tube. A balloon is provided on the inner tube section between the distal end of the outer tube and the drug administration flushing hole. The annular cavity between the outer tube and the inner tube serves as an inflation cavity, and the inflation cavity is connected to the inner cavity of the balloon. An outer tube catheter seat is provided at the proximal end of the outer tube, and the inner cavity of the outer tube catheter seat is connected to the inflation cavity.

2. The balloon catheter according to claim 1, wherein The distal inner tube section of the inner tube is a flexible tube section, and has an end hole and a side hole on the side wall. The end hole and the side hole are both used as drug administration and flushing holes.

3. The balloon catheter according to claim 1, wherein The inner tube catheter seat and the outer tube catheter seat are an integrated structure.

4. The balloon catheter according to claim 3, wherein Also includes: Support tube and heat shrink tubing; The support tube is coaxially sleeved on the outside of the outer tube and the length of the support tube is smaller than that of the outer tube. The heat shrinkable sleeve performs heat shrinkage sealing on the distal end where the catheter seat, the support tube and the outer tube are connected.

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