Medical catheters and medical catheter systems

Abstract

The medical catheter and medical catheter system provided by the present invention include a catheter body and a connector. The connector is detachably connected to the proximal end of the catheter body. A filling material is introduced into the catheter body through the connector. After the filling material is introduced, the catheter body is used to block the bronchus and prevent bronchial bleeding. The connector is detachably connected to the proximal end of the catheter body. During use, the medical catheter can be removed from the body after the connector is removed, allowing the bronchoscope to be removed from the body while retaining the catheter body. The catheter body can then be filled and released with filling material in real time, simplifying surgical procedures, saving surgical time, and potentially saving patients' lives.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a medical catheter and a medical catheter system for bronchial occlusion. Background Art

[0002] Massive hemoptysis is an emergency in the respiratory department. As a serious disease, it requires effective and timely rescue to save the patient's life. Massive hemoptysis refers to a single hemoptysis volume exceeding 100mL or a total hemoptysis volume exceeding 500mL in 24 hours. Massive hemoptysis may cause the patient to go into shock due to excessive blood loss; or blood clots may form in the trachea during sudden massive bleeding, which may block the trachea and cause the patient to suffocate, posing a great threat to the patient's life. The conventional treatment for massive hemoptysis is drug therapy or bronchial artery embolization. Compared with drug therapy, bronchial artery embolization is a more direct and effective treatment for hemostasis.

[0003] Currently, during intubation, endobronchial balloon catheters require inflating or adding samples (such as drug solutions) through the tubing as needed. Disconnecting the tubing from the endobronchial balloon catheter can lead to air leakage or sample backflow, forcing the operator to hold the inflation or sample addition device for extended periods. Furthermore, repeated disassembly and assembly operations pose the risk of tubing contamination, potentially leading to surgical failure.

[0004] Current treatments typically involve inserting a bronchoscope into the bleeding bronchus, leaving a guidewire behind to withdraw the bronchoscope, and then inserting a balloon over the guidewire to block the bleeding. This complex procedure, requiring repeated exchange of bronchoscopes, is time-consuming and can lead to missed treatment windows, threatening the patient's life.

[0005] Therefore, it is necessary to develop a bronchial occlusion balloon catheter that can simplify surgical steps, save surgical time, and save patients' lives in a timely manner. Summary of the Invention

[0006] The object of the present invention is to provide a medical catheter and a medical catheter system, which can simplify surgical procedures, save surgical time, and save patients' lives in a timely manner.

[0007] In order to solve the above problems, the present invention provides a medical catheter, including a catheter body and a connector, wherein the connector is detachably connected to the proximal end of the catheter body, and a filling material is introduced into the catheter body through the connector. After the filling material is introduced, the catheter body is used to block the bronchus and prevent bronchial bleeding.

[0008] Optionally, a sealing valve body is provided at the proximal end of the catheter body, and the sealing valve body is sleeved inside the proximal end of the catheter body.

[0009] When no filling material is introduced into the catheter body, the sealing valve body is used to seal the catheter body to prevent the filling material in the catheter body from flowing back to the connecting piece.

[0010] When filling material is introduced into the catheter body, the sealing valve body is used to connect the catheter body and the connecting piece, and allows the filling material to flow from the connecting piece into the catheter body.

[0011] Furthermore, the sealing valve body includes an arm portion for connecting to the catheter body and a wing portion having an open state and a closed state. The arm portion has a ventilation channel. When filling material is introduced into the catheter body, the wing portion is in an open state, and the ventilation channel is connected to the catheter body. When filling material is not introduced into the catheter body, the ventilation channel is not connected to the catheter body.

[0012] Furthermore, the proximal end of the catheter body has an opening, and the arm portion has a hanging ear, and the hanging ear is used to abut against the opening of the catheter body.

[0013] Furthermore, the catheter body includes a first part, a second part and a third part sequentially connected along the axial direction of the catheter body, the first part is located at the distal end of the catheter body, and the third part is located at the proximal end of the catheter body.

[0014] Furthermore, the first part includes a diameter-varying region and a fixed diameter region connected to each other along its axial direction, the fixed diameter region is located at the proximal end of the first part, and the diameter-varying region is located at the distal end of the first part.

[0015] Furthermore, the variable diameter area only has a drug administration pipeline, the fixed diameter area has a ventilation catheter and a drug administration catheter, the drug administration pipeline in the variable diameter area is connected to the drug administration catheter in the fixed diameter area, and the distal end of the ventilation catheter in the fixed diameter area is closed.

[0016] Furthermore, the second part includes an inner tube and a balloon body, the inner tube is arranged in the balloon body, the distal end of the inner tube is connected to the proximal end of the drug delivery catheter in the solid diameter area, and the distal end of the balloon body is connected to the proximal end of the ventilation catheter in the solid diameter area.

[0017] Furthermore, the third part includes a ventilation catheter, a drug administration catheter and a drug administration cavity. The proximal end of the drug administration catheter of the third part is connected to the drug administration cavity, and the distal end of the drug administration catheter of the third part is connected to the proximal end of the inner tube. The drug administration cavity is used to inject the drug into the bronchus through the catheter body, the distal end of the ventilation catheter of the third part is connected to the proximal end of the balloon body, and the proximal end of the ventilation catheter of the third part is connected to the distal end of the connector.

[0018] Furthermore, the ventilation catheter and the drug delivery catheter are both composed of a braided structure.

[0019] Optionally, the connector consists of a connector body, a one-way valve, an injection needle and a gasket. The connector body is connected at both ends along its axial direction. The gasket is assembled in the port at the distal end of the connector body. The one-way valve is fixedly connected to the port at the proximal end of the connector body, and the one-way valve is used to provide a one-way channel for the filling material to enter the catheter body. The injection needle extends into the port at the proximal end of the catheter body through the one-way valve.

[0020] Furthermore, at least a portion of the injection needle enters the catheter body and does not exceed the wing portion of the sealing valve body.

[0021] Furthermore, the proximal end of the catheter body is sleeved within the distal end of the connector body, and the gasket closes the gap between the proximal end of the catheter body and the port at the distal end of the connector body along the radial direction of the catheter body. The outer diameter of the gasket matches the inner diameter of the port at the distal end of the connector body, and the inner diameter of the gasket matches the outer diameter of the proximal end of the catheter body.

[0022] On the other hand, the present invention also provides a medical catheter system, comprising the medical catheter, an external filling device and a drug delivery device.

[0023] The drug delivery device is connected to the drug delivery cavity, and delivers the drug into the bronchus through the drug delivery cavity, the drug delivery catheter of the third part, the inner tube of the second part, and the drug delivery catheter of the first part;

[0024] The external filling device is connected to the proximal end of the injection needle, and introduces filling material into the balloon body through the injection needle and the ventilation pipeline of the third part.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The medical catheter and medical catheter system provided by the present invention include a catheter body and a connector. The connector is detachably connected to the proximal end of the catheter body. A filling material is introduced into the catheter body through the connector. After the filling material is introduced, the catheter body is used to block the bronchus and prevent bronchial bleeding. The connector is detachably connected to the proximal end of the catheter body. During use, the medical catheter can be removed from the body after the connector is removed, allowing the bronchoscope to be removed from the body while retaining the catheter body. The catheter body can then be filled and released with filling material in real time, simplifying surgical procedures, saving surgical time, and potentially saving patients' lives.

[0027] Furthermore, a sealing valve body is provided at the proximal end of the catheter body. The sealing valve body is sleeved within the proximal end of the catheter body. When no filling material is introduced into the catheter body, the sealing valve body is used to seal the catheter body to prevent the filling material in the catheter body from flowing back into the connector. When filling material is introduced into the catheter body, the sealing valve body is used to connect the catheter body and the connector, allowing the filling material to flow from the connector into the catheter body (right 2). This can meet the requirements of large-scale bleeding, allowing balloon occlusion without withdrawing the airway during bronchoscopy, avoiding the complex operation of repeatedly exchanging and introducing medical catheters in the past, and achieving a simple and quick operation to reach the bleeding site. In addition, the ventilation catheter and the drug delivery catheter are both composed of a braided structure, allowing the medical catheter to be operated without a guidewire, simplifying the surgical steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a medical catheter according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic structural diagram of a connecting piece according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of a sealing valve according to an embodiment of the present invention when no filling material is introduced;

[0031] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of a sealing valve according to one embodiment of the present invention when a filling substance is introduced;

[0032] Figure 5 The figure is a schematic diagram of the three-dimensional structure of another sealing valve according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1-catheter body; 11-first part; 111-variable diameter region; 112-fixed diameter region; 121-inner tube; 122-balloon body; 12-second part; 121-inner tube; 122-balloon body; 13-third part; 131-ventilation line; 132-drug delivery line; 133-drug delivery port; 14-development structure; 15-sealing valve body; 151-wing portion; 1511, 1512-leaflets; 152-arm portion; 1521, 1522-sub-arms; 153-hanging ear;

[0035] 2-connector; 21-connector body; 22-one-way valve; 23-injection needle; 231-head; 24-gasket. DETAILED DESCRIPTION

[0036] The following is a further detailed description of a medical catheter according to the present invention, which illustrates a preferred embodiment of the present invention. It should be understood that those skilled in the art may modify the invention described herein while still achieving the beneficial effects of the invention. Therefore, the following description should be understood as a general guideline for those skilled in the art and is not intended to limit the present invention.

[0037] For the sake of clarity, not all features of actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they would obscure the present invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific goals, such as adapting from one embodiment to another to accommodate system or business constraints. Furthermore, it should be understood that such development work may be complex and time-consuming, but is nevertheless a routine undertaking for those skilled in the art.

[0038] In order to make the purpose and features of the present invention more obvious and easy to understand, the specific embodiments of the present invention are further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0039] In this article, the terms "distal end" and "proximal end" refer to the relative orientation, position, and direction of components or actions relative to each other from the perspective of a doctor using the medical device. Although "distal end" and "proximal end" are not restrictive, "distal end" usually refers to the end of the medical device that first enters the patient's body, and "proximal end" usually refers to the end of the medical device that is closest to the doctor during normal operation.

[0040] Figure 1 FIG. 1 is a schematic diagram of the structure of the medical catheter of this embodiment. Figure 1 As shown, this embodiment provides a medical catheter, which is placed in a bleeding bronchus to block the bronchus and prevent bronchial bleeding. The medical catheter includes a catheter body 1 and a connector 2, and the connector 2 is detachably connected to the proximal end of the catheter body 1. Specifically, the distal end of the connector 2 is detachably connected to the proximal end of the catheter body 1, and the proximal end of the connector 2 is connected to an external inflation device, so that the external inflation device can unidirectionally pass a filling material into the catheter body 1 through the connector 2. The connector 2 is detachably connected to the proximal end of the catheter body 1, so that after the connector 2 is removed from the catheter body 1, the bronchoscope can be withdrawn from the human body, and the catheter body 1 can be retained in the human body, and the catheter body 1 can be filled and discharged with a filling material in real time. The filling material can be a gas or a liquid.

[0041] Figure 2FIG. 1 is a schematic diagram of the structure of the connecting member of this embodiment. Figure 2 As shown, the connector 2 consists of a connector body 21, a one-way valve 22, an injection needle 23, and a gasket 24. The connector body 21 is a hollow, long-axis shape, with both ends of the connector body 21 extending axially. The outer diameter of the connector body 21 can be greater than 2 mm, and the length of the connector body 21 can be 50 mm to 100 mm. The material of the connector body 21 is one or a mixture of polycarbonate, nylon, and acrylonitrile-butadiene-styrene copolymer.

[0042] The one-way valve 22 is assembled at the port at the proximal end of the connector body 21, and its axial direction is the same as that of the connector body 21. The one-way valve 22 is used to fixedly connect the external filling device to provide a one-way passage for the filling material to enter the catheter body 1. The one-way valve 22 includes an outer shell and a valve body arranged in the outer shell. The material of the outer shell is similar to that of the connector body 21, for example, it is also made of one or more mixtures of polycarbonate, nylon and acrylonitrile-butadiene-styrene copolymer. Preferably, the material of the outer shell is the same as that of the connector body 21. The material of the valve body may include rubber, synthetic resin and polytetrafluoroethylene, etc. The injection needle 23 is connected to the external filling device and is connected to the one-way valve 22 through a dispensing process to ensure that the catheter body 1 can normally enter the filling material.

[0043] The injection needle 23 includes a head 231 disposed at its distal end. The head 231 of the injection needle 23 is inserted into the proximal port of the catheter body 1 through the one-way valve 22. The head 231 can be a flat-top structure, such as a flat-top needle tube, to prevent it from scratching the catheter body 1 when entering the catheter body 1 or during use. The injection needle 23 is typically made of 304 or 304L stainless steel to prevent rust when the filling material is introduced.

[0044] The gasket 24 is assembled at the port at the distal end of the connector body 21. The proximal end of the catheter body 1 is sleeved within the distal end of the connector body 21. The gasket 24 radially closes the gap between the proximal end of the catheter body 1 and the port at the distal end of the connector body 21, so that the filling material entering the catheter body 1 through the connector 2 will not leak out from this gap. Specifically, the outer diameter of the gasket 24 matches the inner diameter of the port at the distal end of the connector body 21, and the inner diameter of the gasket matches the outer diameter of the proximal end of the catheter body 1. The gasket 24 is usually an elastic member, and its material is usually selected from rubber, silicone, or polytetrafluoroethylene, etc., to avoid physical collision between the proximal end of the catheter body 1 and the distal end of the connector body 21, causing physical damage to both.

[0045] Please continue reading Figure 1 The catheter body 1 can be a through-body structure or a quick-exchange structure, and the present invention is not limited to this. Figure 1 The figure shows a rapid-exchange catheter body 1. The radial dimension of the catheter body 1 is less than 2 mm, and the axial length thereof can be 120 mm to 170 mm. The above dimensions enable the catheter body 1 to be passed through the bronchoscope channel into or out of the bronchus.

[0046] For the catheter body 1 of a quick-exchange structure, the catheter body 1 includes a first part 11, a second part 12 and a third part 13 connected in sequence along the axial direction of the catheter body 1. The first part 11 and the third part 13, for example, both include hollow catheters. The second part 12 is, for example, a balloon. The proximal end of the first part 11 is connected to the distal end of the second part 12, the distal end of the third part 13 is connected to the proximal end of the second part 12, and the proximal end of the third part 13 is connected to the distal end of the connector 2.

[0047] A drug delivery cavity 133 is provided at the proximal end of the third portion 13, and a drug delivery device is connected to the drug delivery cavity 133. The drug delivery cavity 133 is used to inject drugs into the bronchus through the distal end of the first portion 11 of the catheter body 1 during surgery. The drugs may be hemostatic drugs such as vitamin K, hemostatic acid, and broad-spectrum antibiotics. The drug delivery cavity 133 is 30 mm to 50 mm away from the proximal port of the third portion 13, and the distal end of the connector 2 is connected to the proximal port of the third portion 13. In this way, the drug delivery cavity 133 and the passage for filling the balloon are separated, which allows the balloon filling process and the drug delivery process to be carried out independently without interference.

[0048] The third part 13 includes a ventilation tube 131 and a drug delivery tube 132 . The proximal end of the drug delivery tube 132 of the third part 13 is connected to a drug delivery cavity 133 . The drug delivery device delivers drugs to the drug delivery tube 132 through the drug delivery cavity 133 .

[0049] The filling material introduced by the injection needle 23 can be introduced into the ventilation catheter 131. The ventilation catheter 131 and the drug delivery catheter 132 can be composed of one or both of a membrane structure and a braided structure. The ventilation catheter 131 and the drug delivery catheter 132 are made of a polymer such as polyether block polyamide, nylon, and 20-40% barium sulfate. The braided layer of the ventilation catheter 131 and the drug delivery catheter 132 is generally made of 304 stainless steel or nickel-titanium alloy. Preferably, the ventilation catheter 131 and the drug delivery catheter 132 include at least a braided layer. Since the braided layer has a supporting function, the medical catheter can be operated without a guidewire, thereby eliminating the step of inserting a guidewire and simplifying the surgical steps.

[0050] The second portion 12 comprises an inner tube 121 and a balloon body 122. The inner tube 121 is disposed within the balloon body 122, with the proximal end of the inner tube 121 connected to the distal end of the drug delivery catheter 132 of the third portion 13. The proximal end of the balloon body 122 is connected to the distal end of the ventilation catheter 131 of the third portion 13. The balloon body 122 is made of a flexible polymer, such as polyurethane, silicone, or latex, or a blend of these. When inflated, the balloon can have a diameter of 15 to 25 mm. This flexible balloon conforms to the length and diameter of the tracheal cavity when the filling material is introduced, preventing compression of the tracheal wall while also providing a tracheal occlusion and hemostasis effect. When inflated, both ends of the balloon body 122 have a tapered angle, with the angle between the taper and the axial direction of the catheter body 1 being 30 to 40 degrees. The inner tube 121 is made of polyurethane, nylon, or polyether block polyamide, among others.

[0051] The first portion 11 includes a variable diameter region 111 and a solid diameter region 112 connected along its axial direction. The solid diameter region 112 is located at the proximal end of the first portion 11, and the variable diameter region 111 is located at the distal end of the first portion 11. The length of the variable diameter region 111 is 5mm to 10mm, and the outer diameter of the variable diameter region 111 is 0.5mm to 1mm. The outer diameter of the variable diameter region 111 gradually increases along its axial direction from the distal end to the proximal end until it becomes the same as the outer diameter of the solid diameter region 112. The material of the variable diameter region 111 is silicone, TPU polyurethane, PEBAX block polyetheramide resin, etc., with a hardness of approximately Shore hardness of 50A to 50D. The material of the variable diameter region 111 will not damage the trachea, avoiding the risk of tracheal puncture. The variable diameter region 111 only has a drug delivery pipeline, and the distal end of the inner tube 121 is connected to the proximal end of the drug delivery catheter of the first portion 11.

[0052] The length of the solid diameter area 112 is 5mm to 10mm, and the outer diameter of the solid diameter area 112 is 1mm to 2mm. The solid diameter area 112 is used to support the balloon body 122. Its material is the same as that of the solid diameter area 112 of the first part 11. The solid diameter area 112 has a ventilation catheter and a drug delivery catheter. The distal end of the balloon body is connected to the proximal end of the ventilation catheter of the solid diameter area 112. The drug delivery catheter of the variable diameter area 111 is connected to the drug delivery catheter of the solid diameter area 112. When the drug is delivered to the trachea, the drug passes through the drug delivery pipeline of the solid diameter area 112 and the drug delivery catheter of the variable diameter area 111, and enters the trachea at the distal end of the variable diameter area 111. The proximal end of the ventilation catheter of the solid diameter area 112 is connected to the distal end of the inner tube, and the distal end of the ventilation catheter of the solid diameter area 112 is closed.

[0053] The catheter body 1 is further provided with a developing structure 14. Specifically, the inner tube 121 of the second portion 12 of the catheter body 1 is further provided with the developing structure 14, and the developing structure 14 is disposed at both ends of the inner tube 121. The developing structure 14 is made of a developing material such as a platinum-iridium alloy or a tungsten alloy, and is, for example, a developing ring that is sleeved on the outer side of the inner tube 121.

[0054] The catheter body 1 is provided with a sealing valve body 15 at the proximal end of the third portion 13. The sealing valve body 15 is sleeved within the proximal end of the third portion 13 and is capable of automatically opening and closing in one direction toward the second portion 12 of the catheter body 1. The sealing valve body 15 is made of an elastic material, specifically natural rubber, chloroprene rubber, butyl rubber, or fluororubber, or a mixture thereof.

[0055] Figure 3 A schematic diagram of the longitudinal cross-sectional structure of the sealing valve of this embodiment when no filling material is introduced. Figure 4 The longitudinal cross-sectional structure diagram of the sealing valve of this embodiment when the filling material is introduced. Figure 3-4 As shown, the sealing valve body 15 includes an arm portion 152 for connecting to the catheter body and a wing portion 151 having an open state and a closed state. The arm portion 152 is used to more firmly fix the sealing valve body 15 to the proximal end of the catheter body 1. The wing portion 151 and the arm portion 152 are in a duckbill shape, and the distal end of the arm portion 152 is connected to the wing portion 151.

[0056] The arm portion 152 is composed of at least two branch arms, and the at least two branch arms can be connected in sequence or separated from each other, and the arm portion 152 has a ventilation channel. The wing portion 151 is composed of at least two leaflets, each of which can be connected to one branch arm, or several leaflets can be connected to one branch arm. When filling material is introduced into the catheter body 1, the wing portion 151 is in an open state, and the ventilation channel is connected to the catheter body 1. At this time, the injection needle is pushed into the sealing valve body 15 until the injection needle 23 reaches the ventilation catheter 131 of the third part 13, and the ventilation channel is connected to the catheter body 1, serving as a channel; when filling material is not introduced into the catheter body 1, the wing portion 151 is in a closed state, and the ventilation channel is not connected to the catheter body 1, that is, it serves as a seal.

[0057] In this embodiment, the arm portion 152 is composed of two arms 1521 and 1522, and the two arms 1521 and 1522 are independent and unconnected. The wing portion 151 is composed of two leaflets 1511 and 1512, the proximal end of each leaflet being connected to the distal end of one of the arms, while the distal end of the leaflet is free to move. In the free state, the two leaflets 1511 and 1512 are close together. At this time, the wing portion 151 is in a closed state, and the ventilation channel is closed. Under the action of an external force, that is, when a filling material is introduced into the catheter body, the external force of the filling material on the wing portion 151 causes at least two leaflets to open. At this time, the wing portion 151 is in an open state, and the ventilation channel is open.

[0058] The proximal end of the catheter body 1 has an opening, and the arm portion has a lug 153, which is used to abut the opening of the catheter body 1. The lug 153 is connected to the proximal end of the arm portion 152, is arranged along the radial direction of the arm portion 152, and extends radially outward from the arm portion 152. The outer diameter of the lug 153 is 1.7 mm to 2 mm, and it has an interference fit with the inner diameter of the ventilation tube 131 of the third portion 13, so that when closed, it can seal the proximal end of the catheter body 1 and secure the sealing valve body 15 within the proximal end of the catheter body 1, preventing the sealing valve body 15 from falling out of the proximal end of the catheter body 1.

[0059] The arm portion 152 and wing portion 151 are shaped like a duckbill. The outer diameter of the arm portion 152 is 1.4 mm to 1.8 mm. The leaflet 1511 has an axial length of 4 mm to 8 mm along the arm portion 152. At least a portion of the injection needle enters the catheter body and does not extend beyond the wing portion 151 of the sealing valve body 15.

[0060] In other embodiments, the arm portion comprises three or more sub-arms.

[0061] Figure 5 FIG. 1 is a schematic diagram of the three-dimensional structure of a sealing valve body according to another embodiment. Figure 5 As shown, the arm portion 152 of this embodiment is a complete structure without a branch arm. The arm portion 152 is, for example, a cylindrical structure having a ventilation channel, and the ventilation channel allows the arm portion 152 to pass through in its radial direction. The wing portion 151 is composed of at least two leaflets, and each leaflet is sequentially connected to the circumference of the end surface of the distal end of the arm portion 152. In this embodiment, the wing portion 151 is composed of three leaflets, and the three leaflets are sequentially connected to the circumference of the end surface of the distal end of the arm portion 152. The distal ends of the leaflets can move freely, and in the free state, at least two leaflets are close together. At this time, the wing portion 151 is in a closed state, and the ventilation channel is closed. Under the action of external force, that is, when filling material is introduced into the catheter body, the external force of the filling material on the wing portion 151 causes at least two leaflets to open. At this time, the wing portion 151 is in an open state, and the ventilation channel is open.

[0062] The medical catheter provided by the present invention is used as follows: Taking hemostasis as an example, when using the medical catheter of the present invention for hemostasis, a bronchoscope is inserted through the nasal / oral / tracheal intubation channel, and the medical catheter of the present invention is inserted through the bronchoscope biopsy channel. Under bronchoscope observation, the medical catheter is guided to the bleeding location. At this time, the connector 2 and the catheter body 1 are assembled, and the connector 2 is moved so that the injection needle 23 penetrates the sealing valve body 15. Then, the external filling device passes through the one-way valve 22 and then the injection needle 23 to pass the filling material into the ventilation catheter 131. At this time, the wing portion 151 is in an open state, allowing the filling material to pass into the balloon body 122 and make the balloon body 122 close to the tracheal wall, thereby anchoring it in the bronchus segment to achieve hemostasis. When there is no need to introduce filling material, the connector 2 is disassembled from the proximal end of the catheter body 1, and the external filling device and the connector 2 connected to the connector 2 are removed. At this time, the injection needle 23 in the sealing valve body 15 is also withdrawn. At this time, the sealing valve body 15 is in a naturally closed state. Due to the sealing effect of the sealing valve body 15, the balloon body 122 will not leak out the filling material. After the connector 2 is removed, the connector 2 can be withdrawn from the bronchoscope. Therefore, it can meet the needs of heavy bleeding when the bronchoscope is operated without withdrawing the airway to perform balloon occlusion, avoiding the complicated operation of repeatedly exchanging and introducing medical catheters in the past. It is simple and quick to reach the bleeding site in operation, and the original two steps of inserting the guide wire and the medical catheter are combined into one, achieving a more efficient and accurate hemostasis purpose.

[0063] This embodiment also provides a medical catheter system, comprising a medical catheter, an external filling device, and a drug delivery device. When introducing medication into the bronchus, the drug delivery device is connected to the drug delivery lumen 133 to allow the drug to be introduced into the bronchus through the drug delivery lumen 133, the drug delivery catheter 132, the inner tube, and the drug delivery catheter of the first portion 11. When introducing a filling substance into the balloon 122, the external filling device is connected to the injection needle 23, which is connected to the connector 2. The external filling device introduces the filling substance into the balloon 122 through the injection needle 23 and the ventilation catheter 131, causing the balloon 122 to be filled and tightly attached to the tracheal wall, thereby anchoring the balloon 122 in that section of the bronchus and achieving hemostasis.

[0064] In summary, the medical catheter and medical catheter system provided by the present invention include a catheter body and a connector. The connector is detachably connected to the proximal end of the catheter body, through which a filling material is introduced into the catheter body. After the filling material is introduced, the catheter body is used to block the bronchus and prevent bronchial bleeding. The present invention utilizes a detachable connector attached to the proximal end of the catheter body. This allows the bronchoscope to be removed from the body during use, while retaining the catheter body. The catheter body can then be filled and released with filling material in real time, simplifying surgical procedures, saving surgical time, and potentially saving patients' lives.

[0065] Furthermore, a sealing valve body is provided at the proximal end of the catheter body. The sealing valve body is sleeved within the proximal end of the catheter body. When no filling material is introduced into the catheter body, the sealing valve body is used to seal the catheter body to prevent the filling material in the catheter body from flowing back into the connector. When filling material is introduced into the catheter body, the sealing valve body is used to connect the catheter body and the connector, allowing the filling material to flow from the connector into the catheter body (right 2). This can meet the requirements of large-scale bleeding, allowing balloon occlusion without withdrawing the airway during bronchoscopy, avoiding the complex operation of repeatedly exchanging and introducing medical catheters in the past, and achieving a simple and quick operation to reach the bleeding site. In addition, the ventilation catheter and the drug delivery catheter are both composed of a braided structure, allowing the medical catheter to be operated without a guidewire, simplifying the surgical steps.

[0066] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second" and "third" in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements and steps.

[0067] It is understood that although the present invention has been disclosed above with reference to preferred embodiments, the above embodiments are not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or to modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A medical catheter placed in a bleeding bronchus, characterized in that: The invention comprises a catheter body and a connector, wherein the connector is detachably connected to the proximal end of the catheter body, the connector comprising a connector body, a one-way valve, an injection needle and a gasket, the connector body having two axial ends extending therethrough, the gasket being assembled in a port at the distal end of the connector body, the one-way valve being fixedly connected to the port at the proximal end of the connector body, and the one-way valve being used to provide a one-way passage for the inflow of a filling substance into the catheter body, the injection needle extending into the port at the proximal end of the catheter body through the one-way valve; a sealing valve body being provided at the proximal end of the catheter body, the sealing valve body being sleeved in the proximal end of the catheter body, the sealing valve body comprising an arm portion for connecting to the catheter body and a wing portion having an open state and a closed state, the arm portion having an air vent, and the wing portion being in a one-way, automatically openable or closed state toward the distal end of the catheter body as a whole; Among them, the filling material is introduced into the catheter body through the injection needle of the connecting piece. After the filling material is introduced, the catheter body is used to block the bronchus to prevent bronchial bleeding. The catheter body includes a variable diameter area and a fixed diameter area connected to each other along its axial direction. The variable diameter area is located at the distal end of the catheter and has a gradually decreasing outer diameter, and the fixed diameter area is located at the proximal end of the variable diameter area and has a constant outer diameter.

2. The medical catheter according to claim 1, wherein When no filling material is introduced into the catheter body, the sealing valve body is used to seal the catheter body to prevent the filling material in the catheter body from flowing back to the connecting piece. When filling material is introduced into the catheter body, the sealing valve body is used to connect the catheter body and the connecting piece, and allows the filling material to flow from the connecting piece into the catheter body.

3. The medical catheter according to claim 2, wherein When filling material is introduced into the catheter body, the wing portion is in an open state, and the ventilation channel is connected to the catheter body. When filling material is not introduced into the catheter body, the ventilation channel is not connected to the catheter body.

4. The medical catheter according to claim 3, wherein The proximal end of the catheter body is provided with an opening, and the arm portion is provided with a hanging ear, and the hanging ear is used to abut against the opening of the catheter body.

5. The medical catheter according to claim 1, wherein The catheter body includes a first part, a second part and a third part connected in sequence along the axial direction of the catheter body, the first part is located at the distal end of the catheter body, and the third part is located at the proximal end of the catheter body; the first part includes a diameter-changing region and a fixed diameter region connected to each other along its axial direction, the fixed diameter region is located at the proximal end of the first part, and the diameter-changing region is located at the distal end of the first part.

6. The medical catheter according to claim 5, wherein The variable diameter area only has a drug administration pipeline, the fixed diameter area has a ventilation catheter and a drug administration catheter, the drug administration pipeline in the variable diameter area is connected to the drug administration catheter in the fixed diameter area, and the distal end of the ventilation catheter in the fixed diameter area is closed.

7. The medical catheter according to claim 6, wherein The second part includes an inner tube and a balloon body, wherein the inner tube is arranged in the balloon body, the distal end of the inner tube is communicated with the proximal end of the drug delivery catheter of the solid diameter zone, and the distal end of the balloon body is communicated with the proximal end of the ventilation catheter of the solid diameter zone.

8. The medical catheter according to claim 7, wherein The third part includes a ventilation catheter, a drug administration catheter and a drug administration cavity. The proximal end of the drug administration catheter of the third part is connected to the drug administration cavity, and the distal end of the drug administration catheter of the third part is connected to the proximal end of the inner tube. The drug administration cavity is used to inject the drug into the bronchus through the catheter body. The distal end of the ventilation catheter of the third part is connected to the proximal end of the balloon body, and the proximal end of the ventilation catheter of the third part is connected to the distal end of the connector.

9. The medical catheter according to claim 6 or 8, characterized in that The ventilation catheter and the drug delivery catheter are both composed of one or both of a membrane structure and a braided structure.

10. The medical catheter according to claim 1, wherein At least a portion of the injection needle enters the catheter body and does not extend beyond the wing portion of the sealing valve body.

11. The medical catheter according to claim 10, wherein The proximal end of the catheter body is sleeved within the distal end of the connector body, and the gasket closes the gap between the proximal end of the catheter body and the port at the distal end of the connector body along the radial direction of the catheter body. The outer diameter of the gasket matches the inner diameter of the port at the distal end of the connector body, and the inner diameter of the gasket matches the outer diameter of the proximal end of the catheter body.

12. A medical catheter system, characterized in that: The medical catheter according to any one of claims 1 to 11 further comprises an external filling device and a drug delivery device, The drug delivery device is connected to the drug delivery cavity, and delivers the drug into the bronchus through the drug delivery cavity, the drug delivery catheter of the third part, the inner tube of the second part, and the drug delivery catheter of the first part; The external filling device is connected to the proximal end of the injection needle, and introduces filling material into the balloon body through the injection needle and the ventilation pipeline of the third part.

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