Guiding catheter for pulmonary artery

Abstract

This invention belongs to the field of medical device technology, and particularly relates to a guiding catheter for pulmonary arteries, including a catheter hub, one end of which is detachably connected to a tube body. The end of the tube body away from the catheter hub has a curved structure, and the tube body is a radiopaque tube. The detachable connection of the tube body to the catheter hub facilitates the replacement of tubes with different curved structures, saving surgical time. The radiopaque design of the tube body enhances the surgeon's ability to identify the target location, helping to more accurately assess the condition and formulate a surgical plan. This invention establishes access within the narrow, tortuous, and complex branches of the pulmonary artery, allowing patients to receive effective treatment during a stressful treatment process.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a guiding catheter for pulmonary artery. Background Technology

[0002] In recent years, interventional therapy has developed rapidly, becoming the third fastest-growing therapeutic discipline after internal medicine and surgery, thus filling the gaps in internal and surgical techniques. Interventional therapy is a novel, high-tech, minimally invasive treatment technique characterized by minimal trauma, wide range of indications, definite efficacy, and rapid postoperative recovery, representing a significant future trend in medicine. Among interventional therapy techniques, vascular interventional therapy is the sub-field with the highest technical requirements and entry barriers. The related consumables used occupy a core position among high-value consumables, with vascular interventional catheters being one of the essential and high-value consumables.

[0003] Vascular interventional catheters are essential instruments for vascular interventional diagnosis and treatment. They belong to a special category of medical catheters and are characterized by high technological content and technical requirements. There are many types of vascular interventional catheters, including microcatheters, guiding catheters, balloon catheters, and intermediate catheters. Typically, several different types of vascular interventional catheters are used in combination during a single vascular interventional procedure.

[0004] The pulmonary artery is a thick, short main trunk that carries venous blood to the lungs. The main pulmonary artery originates from the bottom of the right ventricle and extends upwards for about 5 cm before dividing into the left and right pulmonary arteries. The main pulmonary artery and the left and right pulmonary arteries are all located within the pericardium. Because the heart is located on the left side in a normal person, the right pulmonary artery is slightly longer than the left pulmonary artery.

[0005] The left pulmonary artery crosses the front of the thoracic aorta and the left bronchus to the left hilum, where it divides into upper and lower branches that enter the upper and lower lobes of the left lung. The right pulmonary artery is longer, running to the right behind the ascending aorta and superior vena cava, and in front of the right bronchus and esophagus to the right hilum, where it divides into three branches that enter the upper, middle, and lower lobes of the right lung. After entering the lung through the hilum, the left and right pulmonary arteries branch repeatedly with the branches of the bronchi, becoming increasingly finer, eventually forming a capillary network that surrounds the alveolar walls, where gas exchange takes place.

[0006] As can be seen from the above, the pulmonary artery is narrow, tortuous, and has complex branches. In clinical applications, the instruments used in pulmonary artery intervention are mostly the same instruments used in coronary intervention. No products specifically designed for the pulmonary artery have been developed in China. Establishing an effective access is essential for patients to receive effective treatment during the stressful process. Therefore, we urgently need to develop a guiding catheter specifically designed for the pulmonary artery to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this invention is to provide a guiding catheter for the pulmonary artery to solve the problems existing in the prior art.

[0008] To achieve the above objectives, this utility model provides a guiding catheter for pulmonary artery, including a catheter seat, one end of which is detachably connected to a tube body, the end of the tube body away from the catheter seat having a curved structure, and the tube body being a radiopaque tube body.

[0009] Preferably, the curved structure of the tube body is one of MPA guide tube, JR guide tube, and JL guide tube.

[0010] Preferably, the JR and JL guiding catheters can be selected as 7F or 8F large-lumen designs, filling a gap in the current market and meeting clinical needs.

[0011] Preferably, the end of the tube body away from the conduit seat is provided with a non-transparent mark.

[0012] Preferably, the end of the conduit seat near the tube body is threadedly connected to a conduit reinforcement member, the conduit reinforcement member having a through hole along the axial direction, the tube body being inserted into the conduit reinforcement member through the through hole, and the tube body communicating with the conduit seat.

[0013] Preferably, the tube body includes a nylon coating, a wire mesh layer, and a protective layer arranged sequentially from the inside out.

[0014] Preferably, a Luer connector is provided at the end of the conduit seat away from the tube body.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] This invention provides a guiding catheter for the pulmonary artery. The catheter body is detachably inserted into a catheter hub, facilitating the replacement of catheters with different bends, saving surgical time. The catheter body is designed to be radiopaque, enhancing the surgeon's ability to identify the target location and aiding in more accurate diagnosis and surgical planning. This invention establishes access within the narrow, tortuous, and complex branches of the pulmonary artery, allowing patients to receive effective treatment during demanding procedures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a guiding catheter structure for the pulmonary artery proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-section of the tube body in this utility model;

[0020] Figure 3 This is a schematic diagram of the tube body of this utility model having an MPA bent structure;

[0021] Figure 4 This is a schematic diagram of the JR-shaped curved structure of the tube body in this utility model;

[0022] Figure 5 This is a schematic diagram of the tube body of this utility model having a JL-shaped curved structure;

[0023] Figure 6 This is a schematic diagram of the structure of the conduit reinforcement in this utility model;

[0024] The components include: 1. Tube body; 2. Non-transparent markings; 3. Tube reinforcement; 4. Tube seat; 5. Protective layer; 6. Wire mesh layer; 7. Nylon coating. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 6 As shown, this utility model provides a guiding catheter for pulmonary artery, including a catheter seat 4, one end of which is detachably connected to a tube body 1, the end of the tube body 1 away from the catheter seat 4 having a curved structure, and the tube body 1 being a radiopaque tube body.

[0028] The tube body 1 can be detachably connected to the catheter hub 4, making it easy to replace tube bodies 1 with different curved structures, saving surgical time. By setting the tube body 1 to be a radiopaque tube body, the doctor's ability to identify the target location is enhanced, which helps to more accurately judge the condition and formulate a surgical plan.

[0029] This invention establishes a pathway within the narrow, tortuous, and complex pulmonary artery, allowing patients to receive effective treatment during a stressful treatment process.

[0030] Furthermore, the curved structure of tube 1 is one of MPA guide tube, JR guide tube, or JL guide tube.

[0031] Specifically, the pulmonary artery is divided into the left pulmonary artery and the right pulmonary artery. Based on the different structures and branches of the pulmonary artery, the curved structure of tube 1 is MPA, which is applicable to both the left and right pulmonary arteries; the curved structure of tube 1 is JR, which is applicable to the right pulmonary artery; and the curved structure of tube 1 is JL, which is applicable to the left pulmonary artery.

[0032] Furthermore, the JR and JL guiding catheters can be selected as 7F or 8F large-lumen designs. In this embodiment, both the JR and JL guiding catheters are 8F, which allows two balloon catheters to pass through the lumen simultaneously. This is beneficial for the clinical implementation of kissing dilation techniques and is particularly suitable for bifurcation lesions, which are quite common in pulmonary artery disease.

[0033] Furthermore, the end of the tube body 1 away from the conduit seat 4 is provided with a non-transparent mark 2, which is made of tungsten.

[0034] By setting a non-transmissive marker 2, the specific location of the pulmonary artery guiding catheter in the pulmonary artery can be captured more accurately during interventional procedures.

[0035] Furthermore, the end of the conduit seat 4 near the tube body 1 is threadedly connected to a conduit reinforcement 3. The conduit reinforcement 3 has a through hole along the axial direction. The tube body 1 is inserted into the conduit reinforcement 3 through the through hole, and the tube body 1 is connected to the conduit seat 4.

[0036] Specifically, one end of the catheter reinforcement 3 is provided with an external thread, and one end of the catheter seat 4 is provided with an internal thread. The catheter reinforcement 3 and the catheter seat 4 are detachably connected by the engagement of the internal and external threads, which facilitates replacement. At the same time, a through hole is provided at the other end of the catheter reinforcement 3, which facilitates the insertion of the tube body 1 into the catheter reinforcement 3. The catheter reinforcement 3 is elastic, so that the tube body 1 and the catheter reinforcement 3 are press-fitted, which facilitates the replacement of tube bodies 1 with different structures, and at the same time prevents the tube body 1 from falling off during treatment.

[0037] The conduit reinforcement 3 prevents kinking or bending at the connection between the conduit body 1 and the conduit seat 4.

[0038] Furthermore, the tube body 1 includes a nylon coating 7, a wire mesh layer 6, and a protective layer 5 arranged sequentially from the inside out.

[0039] Specifically, the tube body 1 has three layers according to its material: the outer protective layer 5 is made of polyether block polyamide (Pebax), which has excellent properties such as light weight, high resilience, flexibility and impact resistance; the middle wire mesh layer 6 is a steel wire braided structure, and the different braiding methods of the guidewire determine the magnitude of the support force, the size of the inner diameter and the torsion control of the guide tube; the inner nylon coating 7 is a nylon PTFE coating to reduce the friction between the guidewire, balloon, stent and the inner lumen of the guide tube and to prevent thrombosis.

[0040] Furthermore, a Luer connector (not shown in the figure) is provided at the end of the catheter seat 4 away from the catheter reinforcement 3.

[0041] Connect the Luer connector to the Y-type connector or other devices.

[0042] The guiding catheter for pulmonary artery provided by this utility model works as follows: A comprehensive assessment of the patient is conducted to understand their age, weight, health status, medical history, and allergy history. The appropriate size and curved structure of the catheter body 1 are selected and inserted into the catheter reinforcement 3. The other end of the catheter reinforcement 3 is screwed onto the catheter seat 4. The other end of the catheter seat 4 is connected to the device through a Luer connector. According to the selected puncture point, the patient is placed in a suitable position and local anesthesia is administered. The catheter body 1 enters the blood vessel first from the distal end with the curved structure and is advanced forward, sequentially entering the superior vena cava, right atrium, right ventricle, and pulmonary artery until the catheter tip reaches the appropriate position in the pulmonary artery.

[0043] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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.

[0044] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A guiding catheter for the pulmonary artery, characterized in that, Includes a catheter seat (4), one end of which is detachably connected to a tube body (1), the end of the tube body (1) away from the catheter seat (4) has a curved structure, and the tube body (1) is a radiopaque tube body.

2. The guide catheter for a pulmonary artery according to claim 1, wherein, The tube body (1) with a curved structure is one of MPA guide tube, JR guide tube, or JL guide tube.

3. The guide catheter for a pulmonary artery according to claim 1, wherein, The tube body (1) has a non-transparent marking (2) at the end away from the guide seat (4).

4. The introducer sheath for a pulmonary artery of claim 1, wherein, The catheter seat (4) is threaded to a catheter reinforcement (3) at one end near the tube body (1). The catheter reinforcement (3) has a through hole along the axial direction. The tube body (1) is inserted into the catheter reinforcement (3) through the through hole, and the tube body (1) is connected to the catheter seat (4).

5. The introducer sheath for a pulmonary artery of claim 1, wherein, The tube body (1) includes a nylon coating (7), a wire mesh layer (6), and a protective layer (5) arranged sequentially from the inside to the outside.

6. The introducer sheath for a pulmonary artery of claim 1, wherein, The end of the conduit seat (4) away from the tube body (1) is provided with a Luer connector.

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