Eustachian tube balloon dilatation catheter

Abstract

The utility model discloses an auditory tube balloon dilatation catheter which comprises a liquid guide tube, a balloon and a gas guide tube, and a liquid inlet and a liquid outlet are formed in the two ends of the liquid guide tube respectively. The balloon is fixedly arranged on the catheter in a sleeving mode, the balloon is located at the position adjacent to the liquid outlet, the balloon is arranged to be conical, and the outer diameter of the balloon is gradually decreased in the direction close to the liquid inlet in the axial direction; the catheter is sleeved with the catheter, and the catheter is communicated with an inner cavity of the balloon. The extrusion force of the balloon on the inner wall of the cartilage section can be kept when the balloon is pulled out, so that secretions on the surface of the inner wall of the whole cartilage section can be conveniently extruded towards the nasopharynx, and the treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a balloon dilation catheter for the eustachian tube. Background Technology

[0002] The eustachian tube is a narrow passage in the middle and wide at both ends, connecting the tympanic cavity and the nasopharyngeal orifice, respectively. The narrowest part in the middle of the eustachian tube is called the isthmus, and the section of the isthmus near the nasopharyngeal orifice is the cartilaginous segment. Clinically, eustachian tube ventilation dysfunction is usually caused by narrowing of the cartilaginous segment or obstruction of the cartilaginous segment by secretions. Treatment typically involves using a eustachian tube balloon dilation catheter. Existing eustachian tube balloon dilation catheters mainly consist of a drainage tube and a cylindrical balloon. The cylindrical balloon is inserted into the cartilaginous segment, and the segment is dilated by inflating the balloon. This allows for the injection of medication into the tympanic cavity and Eustachian tube via a drainage tube for cleaning treatment. The cylindrical balloon is pulled towards the nasopharyngeal opening, and the pressure between the outer wall of the balloon and the inner wall of the cartilaginous segment forces secretions from the cartilaginous segment out of the nasopharynx. However, as the balloon moves towards the nasopharyngeal opening, the radial opening of the cartilaginous segment gradually increases towards the nasopharyngeal opening, causing the pressure between the balloon and the inner wall of the cartilaginous segment to gradually decrease or even disappear, affecting the expulsion of secretions and thus the treatment effect. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention provides a eustachian tube balloon dilation catheter that maintains pressure on the cartilaginous segment's inner wall when the balloon is pulled out, thereby facilitating the expulsion of secretions from the entire cartilaginous segment's inner wall surface towards the nasopharyngeal opening, thus improving the therapeutic effect.

[0004] According to an embodiment of this utility model, a balloon dilation catheter for the Eustachian tube is provided, comprising a fluid guide tube, a balloon, and an air guide tube. The fluid guide tube has an inlet and an outlet at its two ends, respectively. The balloon is fixedly fitted onto the fluid guide tube and is located adjacent to the outlet. The balloon is conical in shape, and its outer diameter gradually decreases axially towards the inlet. The air guide tube is fitted onto the fluid guide tube and communicates with the inner cavity of the balloon.

[0005] This utility model provides a balloon dilation catheter for the Eustachian tube, which has at least the following beneficial effects: In use, the intubation tube is inserted from the nasopharyngeal opening through the Eustachian tube into the tympanic cavity, simultaneously driving the balloon into the cartilaginous segment of the Eustachian tube. Then, air is inflated into the balloon through the air intubation tube, causing the balloon to expand and press against the inner wall of the cartilaginous segment, thus dilating it. At this time, because the balloon is conical in shape and its outer diameter gradually decreases axially towards the inlet, the larger portion of the balloon's outer diameter is located in the narrower part of the cartilaginous segment. This larger portion of the balloon is not fully inflated due to the reaction force of the inner wall of the cartilaginous segment, maximizing the pressure exerted by the balloon on the inner wall of the cartilaginous segment. Additionally, the medication... The fluid flows into the inlet of the drainage tube and out through the outlet into the tympanic cavity and eustachian tube to cleanse them. When it is necessary to drain secretions, the drainage tube is pulled towards the nasopharyngeal opening, which moves the balloon in that direction. As the balloon moves, the lumen gradually widens, and the reaction force of the inner wall of the cartilage segment on the balloon gradually decreases. This causes the larger outer diameter portion of the balloon to gradually open due to elasticity, ensuring that the outer wall of the balloon remains in close contact with the inner wall of the cartilage segment until it reaches the nasopharyngeal opening. This maintains the pressure of the balloon on the inner wall of the cartilage segment, facilitating the expulsion of secretions from the entire inner surface of the cartilage segment towards the nasopharyngeal opening, thus improving the treatment effect.

[0006] According to some embodiments of the present invention, the balloon has a first conical guide portion extending axially at one end near the liquid outlet, and the outer diameter of the first conical guide portion gradually decreases axially toward the liquid outlet.

[0007] According to some embodiments of the present invention, the balloon has a second conical guide portion extending axially from the end near the inlet, and the outer diameter of the second conical guide portion gradually decreases axially toward the inlet.

[0008] According to some embodiments of the present invention, the fluid guide tube is coaxially arranged with the balloon.

[0009] According to some embodiments of the present invention, the liquid outlet of the liquid guide tube protrudes outward and is configured as a hemispherical end face, and the liquid outlet is opened at the center of the hemispherical end face.

[0010] According to some embodiments of the present invention, the side wall of the liquid outlet end of the liquid guide tube is provided with a liquid outlet hole, and the liquid outlet hole is connected to the inner cavity of the liquid guide tube.

[0011] According to some embodiments of this utility model, multiple sets of liquid outlet holes are provided, and the multiple sets of liquid outlet holes are evenly arranged at intervals along the axial direction of the liquid guide tube.

[0012] According to some embodiments of the present invention, each group of liquid outlet holes includes multiple liquid outlet holes, and the multiple liquid outlet holes in each group are evenly arranged at intervals along the circumference of the liquid guide tube.

[0013] According to some embodiments of this utility model, both the liquid guide tube and the gas guide tube are elastic components.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of the Eustachian tube balloon dilation catheter according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0019] Figure 4 yes Figure 1 A magnified view of a section at point C;

[0020] Figure 5 This is a partial structural schematic diagram of the fluid guide tube of the Eustachian tube balloon dilation catheter according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the Eustachian tube structure according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] Liquid guide tube 100, liquid inlet 110, liquid outlet 120, hemispherical end face 130, liquid outlet hole 140, balloon 200, first conical guide part 210, second conical guide part 220, air guide tube 300, adapter 400, liquid guide channel 410, air guide channel 420, cartilage segment M. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Understandably, referring to Figures 1 to 6 The present invention relates to a balloon dilation catheter for the Eustachian tube, comprising a fluid guide tube 100, a balloon 200, and an air guide tube 300. The fluid guide tube 100 has an inlet 110 and an outlet 120 at its two ends, respectively. The balloon 200 is fixedly fitted onto the fluid guide tube 100 and is located adjacent to the outlet 120. The balloon 200 is conical in shape, and its outer diameter gradually decreases along the axial direction towards the inlet 110. The air guide tube 300 is fitted onto the fluid guide tube 100 and connects to the inner cavity of the balloon 200.

[0029] In use, the intubation tube 100 is inserted into the tympanic cavity through the nasopharyngeal opening and the Eustachian tube, simultaneously extending the balloon 200 into the cartilaginous segment of the Eustachian tube. Then, air is inflated into the balloon 200 through the air intubation tube 300, causing the balloon 200 to expand and press against the inner wall of the cartilaginous segment, thus expanding it. At this time, because the balloon 200 is conical in shape and its outer diameter gradually decreases axially towards the inlet 110, the larger portion of the balloon 200 is located in the narrower part of the cartilaginous segment. This larger portion of the balloon 200 is not fully inflated due to the reaction force of the inner wall of the cartilaginous segment, maximizing the pressure exerted by the balloon 200 on the inner wall of the cartilaginous segment. Additionally, the medication flows from the inlet 110 into the intubation tube 100. The fluid flows out from the outlet 120 into the tympanic cavity and eustachian tube for cleaning treatment. When it is necessary to drain secretions, the drainage tube 100 is pulled towards the nasopharyngeal opening, which moves the balloon 200 towards the nasopharyngeal opening. As the balloon 200 moves, the lumen gradually widens, and the reaction force of the inner wall of the cartilage segment on the balloon 200 gradually decreases. This causes the larger outer diameter part of the balloon 200 to gradually open due to elasticity, so that the outer wall of the balloon 200 always adheres tightly to the inner wall of the cartilage segment until the nasopharyngeal opening. This maintains the squeezing force of the balloon 200 on the inner wall of the cartilage segment, thus facilitating the expulsion of secretions from the entire inner wall surface of the cartilage segment towards the nasopharyngeal opening, thereby improving the treatment effect.

[0030] It should be noted that balloon 200 is an elastic component capable of elastic deformation. When balloon 200 inflates, the larger portion of its outer diameter contracts elastically due to the reaction force of the cartilaginous segment's inner wall, failing to fully inflate, resulting in an outer diameter smaller than when fully inflated. As the inner cavity of the cartilaginous segment gradually increases radially towards the nasopharyngeal orifice, the reaction force of the cartilaginous segment's inner wall on balloon 200 gradually decreases during the withdrawal process. This causes the larger portion of balloon 200's outer diameter to gradually inflate due to elasticity, increasing its outer diameter. This ensures that the outer wall of balloon 200 remains firmly attached to the inner wall of the cartilaginous segment until the nasopharyngeal orifice, maintaining the compressive force of balloon 200 on the cartilaginous segment's inner wall.

[0031] The inlet 110 can be connected to an injection syringe and an injection pump, etc., for delivering the drug solution into the guide tube 100 and allowing it to flow out from the outlet 120 into the Eustachian tube or tympanic cavity; the inlet 110 can also be connected to an aspiration syringe or a negative pressure pump, etc., for creating a negative pressure in the guide tube 100 to draw out secretions from the Eustachian tube or tympanic cavity.

[0032] The end of the air tube 300 away from the balloon 200 can be connected to an air pump for inflating or deflating the balloon 200.

[0033] An adapter 400 can be installed at the inlet end of the liquid guide tube 100. The adapter 400 has a liquid guide channel 410 and a gas guide channel 420. The liquid inlet 110 is connected to the liquid guide channel 410, and the end of the gas guide tube 300 away from the balloon 200 is connected to the gas guide channel 420. The adapter 400 can be used to easily connect devices such as injection syringes, negative pressure pumps and air pumps.

[0034] Understandably, referring to Figure 3 The balloon 200 has a first conical guide portion 210 extending axially from one end near the outlet 120. The outer diameter of the first conical guide portion 210 gradually decreases axially towards the outlet 120. Because the outer diameter of the first conical guide portion 210 gradually decreases axially towards the outlet 120, when the drainage tube 100 drives the balloon 200 into the cartilage segment, the first conical guide portion 210 guides the balloon 200 to slide smoothly into the cartilage segment, which can reduce damage to the inner wall of the Eustachian tube.

[0035] It should be noted that the axial length of the first conical guide 210 is less than the axial length of the balloon 200 body, and the outer diameter of the junction between the first conical guide 210 and the balloon 200 body is the largest. The minimum outer diameter of the first conical guide 210 is greater than the diameter of the isthmus of the Eustachian tube, which can prevent the balloon 200 from tearing the isthmus of the Eustachian tube when it enters the isthmus.

[0036] Understandably, referring to Figure 3 The balloon 200 has a second conical guide portion 220 extending axially from the end near the inlet 110. The outer diameter of the second conical guide portion 220 gradually decreases axially towards the inlet 110. Because the outer diameter of the second conical guide portion 220 gradually decreases axially towards the inlet 110, when the balloon 200 is pulled out, it is guided smoothly out of the cartilaginous segment by the second conical guide portion 220, which can reduce damage to the inner wall of the Eustachian tube.

[0037] It should be noted that the axial length of the second conical guide portion 220 is less than the axial length of the main body of the balloon 200, and the outer diameter of the junction between the second conical guide portion 220 and the main body of the balloon 200 is the largest. Since the expansion of the cartilaginous segment of the Eustachian tube is mainly achieved through the main body of the balloon 200, the effective contact area between the balloon 200 and the inner wall of the cartilaginous segment can be increased by the fact that the axial lengths of both the first conical guide portion 210 and the second conical guide portion 220 are less than the axial length of the main body of the balloon 200, thereby improving the expansion quality.

[0038] Understandably, referring to Figure 1 and Figure 3The drainage tube 100 and the balloon 200 are coaxially arranged. Because the drainage tube 100 and the balloon 200 are coaxially arranged, when the balloon 200 is inflated, it can move the drainage tube 100 to the central axis of the Eustachian tube, which can reduce the possibility of the drainage tube 100 outlet 120 being blocked due to the drainage tube 100 adhering to the inner wall of the Eustachian tube.

[0039] Understandably, referring to Figure 2 and Figure 5 The outlet end of the fluid guide tube 100 protrudes outward and is configured as a hemispherical end face 130, with the outlet 120 located at the center of the hemispherical end face 130. Because the outlet end of the fluid guide tube 100 protrudes outward and is configured as a hemispherical end face 130, when the fluid guide tube 100 is inserted into the Eustachian tube, it abuts against the inner wall of the Eustachian tube through the hemispherical end face 130, allowing the fluid guide tube 100 to slide along the inner wall of the Eustachian tube, thus reducing damage to the inner wall of the Eustachian tube. Furthermore, because the outlet 120 is located at the center of the hemispherical end face 130, the medication can be sprayed out from the outlet 120 along the axial direction of the fluid guide tube 100, thereby flushing the inner wall of the tympanic cavity.

[0040] Clinically, for secretory otitis media and suppurative otitis media caused by eustachian tube dysfunction, after the eustachian tube is dilated by inflating the balloon 200, saline solution is injected into the tympanic cavity through the drainage tube 100 for irrigation and anti-inflammatory drugs. Since the drug solution can only be sprayed out from the outlet 120 along the axis of the drainage tube 100 to irrigate the wall in a single direction, dead zones of irrigation are easily formed, which affects the quality of irrigation treatment.

[0041] Understandably, referring to Figure 2 and Figure 5 The side wall of the liquid outlet end of the liquid guide tube 100 is provided with a liquid outlet hole 140, which is connected to the inner cavity of the liquid guide tube 100. Since the side wall of the liquid outlet end of the liquid guide tube 100 is provided with a liquid outlet hole 140, the liquid sprayed through the liquid outlet hole 140 can rinse the side wall of the tympanic cavity. Furthermore, by rotating the liquid guide tube 100, the circumferential side wall of the tympanic cavity can be rinsed, thereby reducing the rinsing dead angle and improving the quality of rinsing treatment.

[0042] Specifically, refer to Figure 2 and Figure 5 Multiple sets of outlet holes 140 are provided, and these multiple sets of outlet holes 140 are evenly arranged at intervals along the axial direction of the guide tube 100. Because the multiple sets of outlet holes 140 are evenly arranged at intervals along the axial direction of the guide tube 100, it is convenient to uniformly irrigate the axial sidewall of the Eustachian tube, thereby reducing irrigation dead zones and improving the quality of irrigation treatment.

[0043] Specifically, refer to Figure 2 and Figure 5Each set of outlet holes 140 includes multiple outlet holes 140, which are evenly spaced along the circumference of the guide tube 100. Because the multiple outlet holes 140 in each set are evenly spaced along the circumference of the guide tube 100, the circumferential sidewalls of the Eustachian tube can be evenly flushed, and the rotation angle of the guide tube 100 can be reduced.

[0044] It should be noted that each set of liquid outlet holes 140 may include 2 or 4 liquid outlet holes 140, so that two adjacent liquid outlet holes 140 in the circumferential direction of the liquid guide tube 100 form an included angle of 180 degrees or 90 degrees, which facilitates control of the rotation angle of the liquid guide tube 100.

[0045] Specifically, refer to Figure 4 Both the fluid guide tube 100 and the air guide tube 300 are elastic components. Because both the fluid guide tube 100 and the air guide tube 300 are elastic components, they can undergo elastic deformation to adapt to the shape of the Eustachian tube's inner cavity. This facilitates the insertion of the fluid guide tube 100 and the air guide tube 300 into the Eustachian tube and tympanic cavity, and allows the fluid guide tube 100 and the air guide tube 300 to make flexible contact with the inner wall of the Eustachian tube, thereby reducing impact stimulation to the Eustachian tube.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A Eustachian balloon dilation catheter, characterized by, The utility model relates to a medical device, including: a liquid guide pipe, which is provided with a liquid inlet and a liquid outlet at two ends respectively; a balloon, which is fixedly sleeved on the liquid guide pipe, is located adjacent to the liquid outlet, is provided in a conical shape, and has an outer diameter gradually decreasing in an axial direction towards the liquid inlet; a gas guide pipe, which is sleeved on the liquid guide pipe and is communicated with the inner cavity of the balloon.

2. The Eustachian balloon dilation catheter of claim 1, wherein, The balloon is provided with a first tapered guide part axially extending at one end adjacent to the liquid outlet, and the first tapered guide part has an outer diameter gradually decreasing in an axial direction towards the liquid outlet.

3. The Eustachian balloon dilation catheter of claim 1, wherein, The balloon is provided with a second tapered guide part axially extending at one end adjacent to the liquid inlet, and the second tapered guide part has an outer diameter gradually decreasing in an axial direction towards the liquid inlet.

4. The Eustachian balloon dilation catheter of claim 1, wherein, The liquid guide pipe and the balloon are coaxially arranged.

5. The Eustachian balloon dilation catheter of claim 1, wherein, The liquid outlet end of the liquid guide pipe is outwardly convexly provided in a hemispherical end face, and the liquid outlet is arranged at the center of the hemispherical end face.

6. The Eustachian balloon dilation catheter of claim 1, wherein, The side wall of the liquid outlet end of the liquid guide pipe is provided with a liquid outlet hole, and the liquid outlet hole is communicated with the inner cavity of the liquid guide pipe.

7. The Eustachian balloon dilation catheter of claim 6, wherein, The liquid outlet hole is arranged in multiple groups, and the multiple groups of liquid outlet holes are uniformly arranged along the axial direction of the liquid guide pipe.

8. The Eustachian balloon dilation catheter of claim 7, wherein, Each group of liquid outlet holes includes multiple liquid outlet holes, and the multiple liquid outlet holes of each group of liquid outlet holes are uniformly arranged along the circumferential direction of the liquid guide pipe.

9. The Eustachian balloon dilation catheter of claim 1, wherein, The liquid guide pipe and the gas guide pipe are both made of elastic materials.

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