Pulmonary vessel guiding catheter for right heart function examination

Abstract

The utility model belongs to the technical field of pulmonary vessel guiding catheters, and particularly relates to a pulmonary vessel guiding catheter which can be used for right heart function examination. The technology comprises a guiding catheter, and a floating catheter is arranged in the guiding catheter in a penetrating mode. According to the technical scheme, the functions of an existing right heart floating catheter and an existing pulmonary vessel guiding catheter are organically combined, and the function effects of the original right heart floating catheter and the original pulmonary vessel guiding catheter are achieved through one set of technical scheme. Specifically, a guiding catheter in the prior art is adopted, and physical characteristics such as proper flexibility and strength are utilized to adapt to various bends and steers in a blood vessel; a floating catheter in the prior art is adopted to realize pulmonary vessel intervention operation; the floating catheter is arranged in the guiding catheter, so that the guiding catheter can be used for right heart function examination and pulmonary vessel intervention operation, and clinical diversified requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of pulmonary vascular guiding catheter technology, and in particular relates to a pulmonary vascular guiding catheter that can be used for right heart function testing. Background Technology

[0002] Right ventricular floating catheters are primarily used to assess right ventricular function. Through catheter pressure measurement, physicians can accurately measure the pressure in the right atrium, right ventricle, and pulmonary artery, thereby assessing the pumping function of the right heart and the resistance status of the pulmonary artery. This technology provides valuable hemodynamic information for clinical practice and is of great significance in diagnosing cardiovascular diseases such as right heart failure and pulmonary hypertension. However, the function of right ventricular floating catheters is relatively limited, confined to the assessment of right ventricular function, and cannot be directly used for pulmonary vascular interventional procedures. Pulmonary vascular guiding catheters, on the other hand, are mainly used for pulmonary vascular interventional procedures, such as balloon dilation for pulmonary valve stenosis, thrombectomy and thrombolysis for pulmonary thrombosis. These procedures are important for improving pulmonary circulation and alleviating symptoms. However, pulmonary vascular guiding catheters also have limitations; they cannot be directly used to assess right ventricular function, making it difficult for physicians to comprehensively assess the patient's right ventricular function status before and after interventional procedures.

[0003] Both right ventricular floating catheters and pulmonary vascular guiding catheters have relatively limited functions and cannot meet the dual clinical needs for right ventricular function testing and pulmonary vascular interventional procedures. Furthermore, existing right ventricular floating catheters and pulmonary vascular guiding catheters require a special syringe to inflate the balloon through a balloon inflation valve. This valve is a rotary type, requiring a rotating motion to control the inflation and deflation of the balloon. This not only demands a certain level of hand coordination and strength but is also difficult to operate with one hand, especially in emergency situations or when other procedures need to be performed simultaneously. Moreover, when precise control of the balloon inflation volume is required, particularly for slow or precise inflation, single-handed operation of the rotary valve may lead to over-inflation or under-inflation of the balloon. Utility Model Content

[0004] The purpose of this invention is to provide a pulmonary vascular guiding catheter that can be used for both right ventricular function testing and pulmonary vascular interventional procedures.

[0005] The pulmonary vascular guiding catheter for the feasible right heart function test includes a guiding catheter, wherein a floating catheter is disposed through the interior of the guiding catheter.

[0006] This technical solution organically combines the functions of existing right heart floating catheters and pulmonary vascular guiding catheters, achieving the functional effects of both through a single technical solution. Specifically, it utilizes existing guiding catheters, leveraging their suitable flexibility and strength to adapt to various bends and turns within the blood vessel; it employs existing floating catheters to perform pulmonary vascular interventional procedures; and it incorporates a floating catheter within the guiding catheter, thus enabling both right heart function testing and pulmonary vascular interventional procedures, meeting diverse clinical needs.

[0007] Furthermore, the guide catheter and the floating catheter are integrally structured, and the integral structure includes an outer layer, a middle layer and an inner layer from the outside to the inside.

[0008] The middle layer is made of braided wire made of 304 stainless steel, and the outer and inner layers are both made of polyether block polyamide. The inner layer has four cavities independently set along its length. These four cavities are the loach guide wire cavity, the heat-sensitive guide wire cavity, the balloon pressurization cavity, and the saline cavity.

[0009] The four cavities within the inner layer are independently arranged along the length direction and are parallel to each other, thus allowing the four cavities to penetrate the tube body. The integrated structure design of the guiding catheter and the floating catheter can effectively reduce the wall thickness of the tube body and make it more flexible in use. The middle layer is made of 304 stainless steel braiding, while the outer and inner layers are made of polyether block polyamide, giving the integrated tube body suitable physical properties such as flexibility and strength, which can effectively ensure pushing force and torsional force.

[0010] Furthermore, the braided yarn is a flat yarn.

[0011] The braided yarn is made of flat yarn, which has a thinner wall in the middle layer compared to round yarn, providing more space for other functional chambers.

[0012] Furthermore, the intermediate layer is made of braided yarns woven in a diamond pattern.

[0013] The use of diamond-shaped braiding allows for excellent torque transmission in the catheter.

[0014] Furthermore, the outer surface of the outer layer is coated with a hydrophilic coating.

[0015] Hydrophilic coatings can increase the smoothness of the guiding catheter.

[0016] Furthermore, the inner wall of the loach guide wire cavity is coated with a silicone oil coating.

[0017] Coating the inner wall of the guide wire cavity with silicone oil can increase the smoothness of the guide wire.

[0018] Furthermore, one end of the guiding catheter is provided with a first balloon, the air outlet of the balloon's pressurization chamber is connected to the first balloon, the air inlet of the balloon's pressurization chamber is connected to an air tube, and the air inlet of the air tube is connected to an elastic second balloon. The second balloon is provided with an inflation valve core, which includes a left valve core body and a right valve core body that are distributed horizontally and slide vertically together. The left valve core body has a first air channel running through it, the air outlet of the first air channel is connected to the air tube, and the air inlet of the first air channel faces the left side of the right valve core body. The right valve core body has a second air channel running through it, the air outlet of the second air channel faces the right side of the left valve core body, and the air inlet of the second air channel is connected to the outside.

[0019] In its natural state, the left valve core and the right valve core form a spherical structure as a whole, and the air inlet end of the first air duct and the air outlet end of the second air duct are intersected and do not communicate with each other.

[0020] The right side of the left valve core and the left side of the right valve core are configured in a sealed sliding fit. After sliding to the maximum stroke, the air inlet end of the first air duct is connected to the air outlet end of the second air duct.

[0021] When the first balloon needs to be inflated, the syringe is connected to the air inlet of the second air duct. Holding the second balloon with one hand, the left and right valve cores, which are slidably fitted together, slide to their maximum stroke. At this point, the air inlet of the first air duct connects to the air outlet of the second air duct. Because the right side of the left valve core and the left side of the right valve core are in a sealed sliding fit, during the sliding process, before the first and second air ducts connect, both the air inlet and outlet of the first and second air ducts are sealed, and no gas passes through. Once the maximum stroke is reached, the air inlet of the first air duct connects to the air outlet of the second air duct, and the gas entering the inflation valve core can only pass through the second and first air ducts. The air enters the trachea; after the first and second air channels connect, air is injected through a syringe. The injected air passes through the second air channel, the first air channel, and the trachea in sequence into the first balloon, inflating it and increasing its size. The sliding stroke of the left and right valve cores can be changed by altering the grip strength, thus changing the staggered distance between the second and first air channels and consequently the size of the connecting section between them, thereby adjusting the air intake speed. The second balloon is made of elastic material; when the grip strength is lost or reduced, the second balloon will rebound to its balloon state, causing the inflation valve core composed of the left and right valve cores to return to its natural state. The second balloon can be used with one hand, improving operational flexibility.

[0022] Furthermore, a limit slider is fixed on the left side of the right valve core, and a limit groove is provided on the right side of the left valve core to slide in cooperation with the limit slider.

[0023] The limiting groove and limiting slider facilitate the connection between the first and second air ducts, and also facilitate the limiting of the left and right valve cores during the sliding process, so that the right side of the left valve core and the left side of the right valve core are in a sealed sliding fit.

[0024] Furthermore, the inflation valve core has an ellipsoidal structure.

[0025] The ellipsoidal structure of the second balloon and the inflation valve core are more in line with the structure of the human hand, making it easier to operate with one hand.

[0026] Furthermore, the guiding catheter is connected to a second connector at one end near the second balloon. The second connector is a four-way connector, which is connected to the loach guidewire lumen, the thermal guidewire lumen, the balloon pressurization lumen, and the saline lumen, respectively. The second connector connected to the balloon pressurization lumen is connected to the air outlet of the trachea. The second connector connected to the saline lumen is connected to a saline tube. The second connector connected to the loach guidewire lumen is connected to a loach guidewire that can independently enter and exit the lumen. The second connector connected to the thermal guidewire lumen is connected to a thermal guidewire. One end of the thermal guidewire passes through the thermal guidewire lumen and is connected to a thermistor on the end of the guiding catheter near the first balloon. The other end of the thermal guidewire is connected to a thermal conversion connector.

[0027] The second connector facilitates the connection between the endotracheal tube and the balloon pressurization chamber, the connection between the saline tube outlet and the saline chamber, the connection between the thermal guidewire and the thermistor, and the independent passage and entry / exit of the loach guidewire into and out of the loach guidewire chamber.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This technical solution organically combines the functions of existing right heart floating catheters and pulmonary vascular guiding catheters, achieving the functional effects of both through a single technical solution. Specifically, it utilizes existing guiding catheters, leveraging their suitable flexibility and strength to adapt to various bends and turns within the blood vessel; it employs existing floating catheters to perform pulmonary vascular interventional procedures; and it incorporates a floating catheter within the guiding catheter, thus enabling both right heart function testing and pulmonary vascular interventional procedures, meeting diverse clinical needs. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a pulmonary vascular guiding catheter for a feasible right heart function test;

[0031] Figure 2 for Figure 1 A magnified partial cross-sectional view of the central inflation valve core and the second balloon.

[0032] Figure 3 for Figure 2 A schematic cross-sectional view of the structure after removing the second balloon along line AA.

[0033] Figure 4 for Figure 2 A schematic cross-sectional view of the structure after removing the second balloon along the BB line;

[0034] Figure 5 for Figure 2 A three-dimensional structural diagram of the left-center valve core;

[0035] Figure 6 for Figure 2 A three-dimensional structural diagram of the right valve core;

[0036] Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure after partial cross-section;

[0037] Figure 8 A schematic diagram showing the engagement state of the balloon inflation valve core and the second balloon during use;

[0038] Figure 9 yes Figure 1 Enlarged structural schematic diagram after cross-section along the CC line;

[0039] Figure 10 yes Figure 1 Enlarged structural diagram after cross-section along line DD.

[0040] The components in the diagram are named as follows: 1. Inflation valve core; 1.1. First connector; 1.2. Left valve core body; 1.3. Right valve core body; 1.4. First air duct; 1.5. Second air duct; 1.6. Limiting groove; 1.7. Limiting slider; 2. Thermosensitive guide wire; 3. Saline tube; 4. Loach guide wire; 5. First balloon; 6. Guiding tube; 7. Second connector; 8. Air tube; 9. Second balloon; 10. Outer layer; 11. Middle layer; 12. Inner layer; 13. Loach guide wire cavity; 14. Thermosensitive guide wire cavity; 15. Balloon pressurization cavity; 16. Saline cavity; 17. Saline outlet hole; 18. Balloon pressurization hole. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0042] Example

[0043] This embodiment describes a pulmonary vascular guiding catheter for testing right ventricular function, such as... Figure 1As shown, the device includes a guiding catheter 6, with a floating catheter inserted through its interior. The functions of existing right heart floating catheters and pulmonary vascular guiding catheters are organically combined, achieving the functional effects of both through a single technical solution. Specifically, the guiding catheter 6 utilizes its suitable flexibility and strength to adapt to various bends and turns within the blood vessel; the floating catheter is used for pulmonary vascular interventional procedures; and the floating catheter within the guiding catheter 6 allows it to be used for both right heart function examinations and pulmonary vascular interventional procedures, meeting diverse clinical needs.

[0044] In practical use, the guide catheter 6 and the floating catheter are designed as a single integrated structure. Figures 1 to 10 For ease of explanation, the integrated tube body is simply labeled as the guiding tube 6. In reality, it is an integrated tube body consisting of the guiding tube 6 and the floating tube. The integrated design of the guiding tube 6 and the floating tube can effectively reduce the wall thickness of the tube body and make it more flexible in use. The integrated tube body consists of an outer layer 10, a middle layer 11 and an inner layer 12 from the outside to the inside.

[0045] The intermediate layer 11 is made of braided wires of 304 stainless steel. The braided wires are flat wires. Compared with round wires, the wall thickness of the intermediate layer 11 is thinner, which brings more space to other functional chambers. The intermediate layer 11 is made of braided wires in a diamond pattern. The diamond pattern allows the catheter to have good torque transmission.

[0046] Both the outer layer 10 and the inner layer 12 are made of polyether block polyamide, which is the scientific name for PEBAX. Specifically, the outer layer 10 and inner layer 12 can be PEBAX7233, PEBAX6333, PEBAX5533, PEBAX4533, PEBAX3533, PEBAX2533, etc., possessing suitable physical properties such as flexibility and strength to adapt to various bends and turns within the blood vessel, effectively ensuring pushing and torsional forces. The outer surface of the outer layer 10 is coated with a hydrophilic coating, which increases the smoothness of the guiding catheter 6.

[0047] The inner layer 12 has four independently arranged cavities along its length: a loach guidewire cavity 13, a thermosensitive guidewire cavity 14, a balloon pressurization cavity 15, and a saline cavity 16. These four cavities are independently arranged along their length and are parallel to each other, allowing them to penetrate the tube body. The inner wall of the loach guidewire cavity 13 is coated with a silicone oil coating, which increases the smoothness with the loach guidewire 4.

[0048] like Figure 1As shown, the guiding catheter 6 is divided into two ends, one end being the proximal end and the other end being the distal end. Starting from the distal end, black ring marks are marked every 10 cm to the proximal end of the guiding catheter 6 to indicate the insertion depth. This helps medical staff determine the insertion depth of the catheter. The interval between the marks can be increased or decreased as needed.

[0049] The distal end of the guiding catheter 6 is provided with a first balloon 5. The specific material and installation method can be referenced from the balloons on floating catheters in existing known technologies. The balloon is made of polyurethane (TPU), which is very soft and has good conformability. The outlet end of the balloon pressurization chamber 15, i.e., at the first balloon 5, has a cylindrical hole, called the balloon pressurization port 18, which is connected and communicates with the first balloon 5 for pressurizing and depressurizing the first balloon. The inlet end of the balloon pressurization chamber 15 is connected to an air tube 8, and the inlet end of the air tube 8 is connected to an elastic second balloon 9. The outlet end of the air tube 8 is connected and communicates with the inlet end of the balloon pressurization chamber 15. A thermistor is installed on the guiding catheter 6 on one side of the first balloon 5. That is, a thermistor is installed on the outer wall of the distal end of the guiding catheter 6. The thermistor is connected to a thermistor guide wire 2. One end of the thermistor guide wire 2 is connected to the thermistor, and the other end of the thermistor guide wire 2 extends out of the guiding catheter 6 through the thermistor guide wire cavity 14 and is connected to the thermistor conversion connector.

[0050] The distal end of the guiding catheter 6 on one side of the first balloon 5 is equipped with a loach guide wire interface and a cylindrical saline outlet hole 17. A loach guide wire 4 is installed inside the loach guide wire cavity 13. One end of the loach guide wire 4 is connected to the loach guide wire interface, and the other end extends out of the guiding catheter 6 after passing through the loach guide wire cavity 13. The saline outlet hole 17 is connected to the saline cavity 16, and the inlet end of the saline cavity 16 is connected to a saline tube 3. These interfaces are designed with standard connection mechanisms and sealing devices to ensure stability and safety during operation.

[0051] The distal end of the guiding catheter 6 has a curved structure to facilitate the catheter in finding the target blood vessel in the body.

[0052] like Figure 1As shown, the end of the guiding catheter 6 near the second balloon 9 is connected to a second connector 7, which is a four-way connector. This four-way connector is connected to the loach guidewire cavity 13, the thermal guidewire cavity 14, the balloon pressurization cavity 15, and the saline cavity 16, respectively. The connection port of the second connector 7 connected to the balloon pressurization cavity 15 is connected to the air outlet of the trachea 8. The connection port of the second connector 7 connected to the saline cavity 16 is connected to the saline tube 3. The connection port of the second connector 7 connected to the loach guidewire cavity 13 is connected to the loach guidewire 4, which can independently enter and exit the port. The connection port of the second connector 7 connected to the thermal guidewire cavity 14 is connected to the thermal guidewire 2. One end of the thermal guidewire 2 passes through the thermal guidewire cavity 14 and is connected to the thermistor on the end of the guiding catheter 6 near the first balloon 5. The other end of the thermal guidewire 2 is connected to a thermal conversion connector. The four-way connector is a known existing technology; the second connector 7 facilitates the connection between the air tube 8 and the balloon pressurization chamber 15, facilitates the connection between the outlet end of the saline tube 3 and the saline chamber 16, facilitates the connection between the thermal guide wire 2 and the thermistor through the thermal guide wire chamber 14, and facilitates the independent passage and entry / exit of the loach guide wire 4 through the loach guide wire chamber 13.

[0053] like Figure 2 As shown, the second balloon 9 is made of materials with comprehensive properties such as high strength, high toughness, wear resistance, and high resilience, such as medical TPU (thermoplastic polyurethane elastomer). The second balloon 9 is an ellipsoid or a sphere. An inflation valve core 1 is provided inside the second balloon 9. The main structure of the inflation valve core 1 is a spherical structure, which is divided along the longitudinal center line. The left half serves as the left valve core 1.2, and the right half serves as the right valve core 1.3.

[0054] like Figure 3 As shown, a first transverse air duct 1.4 is opened on the front side of the horizontal centerline of the left valve core 1.2, and a second transverse air duct 1.5 is opened on the rear side of the horizontal centerline of the right valve core 1.3. The first air duct 1.4 and the second air duct 1.5 are staggered, that is, in Figure 1 The first air duct 1.4 and the second air duct 1.5 are staggered vertically. The first connector 1.1 is fixedly connected to the left end of the first air duct 1.4 and the right end of the second air duct 1.5, respectively. The first connector 1.1 is a Luer connector.

[0055] like Figure 3 As shown, cavities are cut into the rear half of the left valve core 1.2 and the front half of the right valve core 1.3. The cavity size must meet the requirements that, in their natural state, the left valve core 1.2 can isolate the second air duct 1.5, and the right valve core 1.3 can isolate the first air duct 1.4.

[0056] like Figure 4 and 5As shown, on the right side of the left valve core 1.2, located on the upper and lower sides of the second air duct 1.5, two symmetrical transverse limiting grooves 1.6 are provided. The limiting grooves 1.6 are T-shaped grooves. Figure 5 As shown, one end of the limiting slide groove 1.6 extends into the cavity behind the left valve core 1.2, and the other end extends beyond the second air duct 1.5 by a certain distance, which is as follows: Figure 3 As shown, the distance between the second air duct 1.5 and the first air duct 1.4, which are staggered one after the other, is... Figure 1 The distance between the first air duct (1.4) and the second air duct (1.5) is staggered vertically. For example... Figure 6 As shown, on the left side of the right valve core 1.3, at a position corresponding to the limiting slide groove 1.6, a limiting slider 1.7 is fixed. The limiting slider 1.7 is a T-shaped slider. Figure 1 In the design, the limiting groove 1.6 and the limiting slider 1.7 are in a vertical sliding fit. In actual use, the limiting groove 1.6 and the limiting slider 1.7 can also be other sliding fit structures in the prior art, as long as they meet the sealing sliding fit requirements of the left valve core 1.2 and the right valve core 1.3.

[0057] like Figure 6 As shown, one end of the limiting slide groove 1.6 extends into the cavity of the right valve core 1.3, and the other end is flush with the second air duct 1.5. Figure 4 As shown, the left valve core 1.2 and the right valve core 1.3 are combined into one unit, and the limiting slider 1.7 and the limiting groove 1.6 are set in a sliding fit.

[0058] In its natural state, the left valve core 1.2 and the right valve core 1.3 form a spherical structure as a whole, and the air inlet end of the first air duct 1.4 and the air outlet end of the second air duct 1.5 are intersected and do not communicate with each other;

[0059] The right side of the left valve core 1.2 and the left side of the right valve core 1.3 are configured in a sealed sliding fit. After sliding to the maximum stroke, the air inlet of the first air duct 1.4 is connected to the air outlet of the second air duct 1.5.

[0060] The specific application of the above technical solution includes the following steps:

[0061] Step 1: Preoperative preparation:

[0062] A comprehensive preoperative evaluation of the patient is conducted, including electrocardiogram and echocardiography, to determine the surgical plan and catheter type. Necessary surgical instruments and medications, such as anesthetics and anticoagulants, are prepared. The multi-functional pulmonary vascular guiding catheter is connected to the corresponding operating handle and interventional tools, ensuring the equipment is in good working order.

[0063] Step Two, Surgical Procedure:

[0064] Under local or general anesthesia, a catheter is inserted into the body via the femoral vein. The physician manually adjusts the position and angle of the catheter according to the markings on the catheter body and the anatomical structure of the surgical site, using imaging techniques such as X-rays to guide it to the target locations in the vena cava, right atrium, right ventricle, and pulmonary artery.

[0065] Depending on the surgical requirements, appropriate interventional tools are selected for pulmonary vascular interventional procedures, such as pressure measurement, blood sampling, balloon dilation, and thrombus fragmentation. During the procedure, the physician must continuously monitor the catheter to ensure its operational status and parameters remain within normal ranges.

[0066] Step 3: Postoperative care:

[0067] After the procedure, the catheter is removed from the body, and necessary wound care is performed. Close postoperative monitoring of the patient is conducted, including follow-up electrocardiograms and echocardiograms, to assess the surgical outcome and the patient's recovery.

[0068] In step two, when it is necessary to inflate the first balloon 5, such as... Figure 8 As shown, a dedicated syringe is connected to the first connector 1.1 at the right end of the second air duct 1.5. The second balloon 9 is held tightly with one hand, and the left valve core 1.2 and the right valve core 1.3 are squeezed and deformed into their respective cavities to make the second air duct 1.5 and the first air duct 1.4 open. Air is injected through the syringe to inflate the first balloon 5.

[0069] Specifically, when the first balloon 5 needs to be inflated, the syringe is connected to the air inlet of the second air duct 1.5. Holding the second balloon 9 with one hand, the left valve core 1.2 and right valve core 1.3, which are slidably fitted together, slide to their maximum stroke. At this point, the air inlet of the first air duct 1.4 connects to the air outlet of the second air duct 1.5. Because the right side of the left valve core 1.2 and the left side of the right valve core 1.3 are in a sealed sliding fit, during the sliding process, before the first air duct 1.4 and the second air duct 1.5 are connected, the air inlet of the first air duct 1.4 and the air outlet of the second air duct 1.5 are both sealed, and no gas passes through. When the maximum stroke is reached, the air inlet of the first air duct 1.4 connects to the air outlet of the second air duct 1.5, and the gas entering the inflation valve core 1 can only pass through… The air enters the trachea 8 through the second air duct 1.5 and the first air duct 1.4. After the first air duct 1.4 and the second air duct 1.5 are connected, air is injected through a syringe. The injected air passes through the second air duct 1.5, the first air duct 1.4 and the trachea 8 in sequence and enters the first balloon 5 to inflate the first balloon 5, thus increasing its size. The sliding stroke of the left valve core 1.2 and the right valve core 1.3 can also be changed by changing the grip strength, thereby changing the stagger distance between the second air duct 1.5 and the first air duct 1.4, and thus changing the size of the connecting part between the first air duct 1.4 and the second air duct 1.5, thereby adjusting the intake speed. The second balloon 9 is made of elastic material. When the grip strength disappears or decreases, the second balloon 9 will rebound to the balloon state, thereby causing the inflation valve core 1 composed of the left valve core 1.2 and the right valve core 1.3 to return to its natural state. By setting up the first balloon 5, saline tube, loach guidewire and thermistor, not only can pulmonary vascular intervention be performed, but also various examination requirements for right heart function can be met at the same time.

[0070] like Figure 4 As shown, the cooperation of the limiting groove 1.6 and the limiting slider 1.7 can prevent the left valve core 1.2 and the right valve core 1.3 from shifting left or right during movement (i.e., Figure 1 The vertical offset of the second air duct 1.5 and the first air duct 1.4 can be deformed to overlap at most by the length of the limiting groove 1.6 (which limits the vertical offset of the second air duct 1.5 and the first air duct 1.4). By changing the grip strength of the hand, the stagger distance between the second air duct 1.5 and the first air duct 1.4 can be changed, thereby adjusting the intake speed.

[0071] In summary, this technical solution can be used for both right ventricular function testing and pulmonary vascular interventional procedures, meeting diverse clinical needs. The design of the inflation valve core 1 allows for single-handed operation of the second balloon 9 during air injection and deflation, improving operational flexibility: single-handed operation allows medical staff to control the second balloon 9 while performing other tasks, increasing operational agility. In emergencies, single-handed operation allows for rapid inflation or deflation of the first balloon 5, enabling timely response to unexpected situations during surgery, which is particularly important for medical procedures requiring rapid execution.

[0072] This technical solution ingeniously integrates the functions of a right ventricular floating catheter and a pulmonary vascular guiding catheter, designing a novel catheter capable of both right ventricular function testing and pulmonary vascular interventional procedures. This design overcomes the limitations of traditional catheters with single functions, achieving diversification and integration of catheter functions.

[0073] The catheter is made with advanced biocompatible materials and precision manufacturing processes to ensure its safety and reliability during in vivo use. At the same time, the choice of materials also guarantees the catheter's flexibility and durability in complex vascular environments, improving surgical success rates and patient comfort.

[0074] The pulmonary vascular guiding catheter simplifies the procedure by integrating functions, reducing surgical time and patient discomfort. Furthermore, because it eliminates the need for catheter replacement, it lowers the risk of infection and complications during the procedure, thus improving safety and success rates.

[0075] By integrating the functions of two catheters, this invention reduces medical costs and alleviates the burden on patients and medical institutions. Furthermore, its ease of operation and high efficiency improve the utilization efficiency of medical resources, bringing better economic and social benefits to medical institutions.

[0076] The multifunctional pulmonary vascular guiding catheter described in this technical solution integrates the functions of a right heart floating catheter and a pulmonary vascular guiding catheter, achieving efficient, safe, and precise diagnostic and treatment goals. Its rational structure and feasible implementation plan will provide new solutions and ideas for the clinical diagnosis and treatment of cardiovascular diseases.

Claims

1. A pulmonary vascular guide catheter for enabling right heart function examination, comprising a guide catheter (6), characterized in that: The guide tube (6) has a floating tube running through its interior; the tube body of the guide tube (6) and the tube body of the floating tube are an integral tube body, which includes an outer layer (10), a middle layer (11) and an inner layer (12) from the outside to the inside. The middle layer (11) is woven from 304 stainless steel wire. The outer layer (10) and the inner layer (12) are both made of polyether block polyamide. The inner layer (12) has four cavities independently arranged along the length direction. These four cavities are the loach guide wire cavity (13), the heat-sensitive guide wire cavity (14), the balloon pressurization cavity (15), and the saline cavity (16).

2. The pulmonary vasculature guide catheter that enables right heart function examination of claim 1, wherein: The braided yarn is a flat yarn.

3. The pulmonary vasculature guide catheter that enables right heart function examination of claim 2, wherein: The intermediate layer (11) is made of braided yarns in a diamond pattern.

4. The pulmonary vasculature guide catheter that enables right heart function examination of claim 1, wherein: The outer surface of the outer layer (10) is coated with a hydrophilic coating.

5. The pulmonary vasculature guide catheter that enables right heart function examination of claim 1, wherein: The inner wall of the loach guide wire cavity (13) is coated with a silicone oil coating.

6. The pulmonary vasculature guide catheter that enables right heart function examination of claim 1, wherein: One end of the guiding catheter (6) is provided with a first balloon (5). The air outlet of the balloon pressurization chamber (15) is connected to the first balloon (5). The air inlet of the balloon pressurization chamber (15) is connected to a trachea (8). The air inlet of the trachea (8) is connected to an elastic second balloon (9). The second balloon (9) is provided with an inflation valve core (1). The inflation valve core (1) includes a left valve core body (1.2) and a right valve core body (1.3) that are distributed on the left and right and slide together vertically. The left valve core (1.2) has a first air duct (1.4) running through its interior. The outlet of the first air duct (1.4) is connected to the air pipe (8). The inlet of the first air duct (1.4) faces the left side of the right valve core (1.3). The right valve core (1.3) has a second air duct (1.5) running through its interior. The outlet of the second air duct (1.5) faces the right side of the left valve core (1.2). The inlet of the second air duct (1.5) is connected to the outside. In its natural state, the left valve core (1.2) and the right valve core (1.3) form a spherical structure as a whole, and the air inlet of the first air duct (1.4) and the air outlet of the second air duct (1.5) are intersected and do not communicate with each other; The right side of the left valve core (1.2) and the left side of the right valve core (1.3) are configured in a sealed sliding fit. After sliding to the maximum stroke, the air inlet of the first air duct (1.4) is connected to the air outlet of the second air duct (1.5).

7. The pulmonary vasculature guide catheter that enables right heart function examination of claim 6, wherein: A limiting slider (1.7) is fixed on the left side of the right valve core (1.3), and a limiting groove (1.6) is provided on the right side of the left valve core (1.2) corresponding to the limiting slider (1.7) in sliding cooperation with the limiting slider (1.7).

8. The pulmonary vasculature guide catheter that enables right heart function examination of claim 7, wherein: The inflation valve core (1) has an ellipsoidal structure.

9. The pulmonary vasculature guide catheter that enables right heart function examination of claim 8, wherein: The guiding catheter (6) is connected to a second connector (7) at one end near the second balloon (9). The second connector (7) is a four-way connector, which is connected to the loach guidewire cavity (13), the heat-sensitive guidewire cavity (14), the balloon pressurization cavity (15), and the saline cavity (16) respectively. The connection port of the second connector (7) connected to the balloon pressurization cavity (15) is connected to the air outlet of the trachea (8), and the connection port of the second connector (7) connected to the saline cavity (16) is connected to... A second connector (7) connected to a saline tube (3) and a loach guide wire (4) that can independently enter and exit the port is connected to a second connector (7) connected to a loach guide wire cavity (13). A thermal guide wire (2) is connected to a second connector (7) connected to a thermal guide wire cavity (14). One end of the thermal guide wire (2) passes through the thermal guide wire cavity (14) and is connected to a thermistor on the end of the guiding catheter (6) near the first balloon (5). The other end of the thermal guide wire (2) is connected to a thermal conversion connector.

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