Guide catheter for interventional therapy

Abstract

The invention relates to a guide catheter for interventional therapy, belongs to the technical field of medical instruments, and solves one of the problems that an existing guide catheter is easy to slip from a coronary artery inlet, is easy to interfere with normal blood flow and cannot dynamically regulate and control the anchoring length. The guiding catheter comprises a guiding catheter body and an anchoring device, the anchoring device is installed on the guiding catheter body, and the anchoring device is used for anchoring the guiding catheter body at the coronary artery inlet so as to reduce the risk that the guiding catheter slips from the coronary artery inlet. The guiding catheter body is stably anchored at the coronary artery inlet through the anchoring device, so that the risk that the guiding catheter slips from the coronary artery inlet is reduced, the operation difficulty that an interventional instrument enters the coronary artery through the guiding catheter is reduced, and the operation safety and the operation efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a guiding catheter for interventional therapy. Background Technology

[0002] In coronary interventional procedures (such as percutaneous coronary intervention (PCI)), the guiding catheter serves as both a device delivery channel and an operating platform. Its stability at the coronary artery inlet directly determines the safety and effectiveness of the procedure. During interventional surgery, the tip of the guiding catheter needs to be embedded into the coronary artery inlet and maintained axially. Traditional guiding catheters rely on manual maintenance by the operator, which not only increases the difficulty of the procedure for medical staff but also increases the risk of the guiding catheter slipping out of the coronary artery inlet during the operation, reducing surgical safety and operational efficiency. Summary of the Invention

[0003] In view of the above analysis, the present invention aims to provide a guiding catheter for interventional treatment, in order to solve one of the problems of existing guiding catheters that are prone to slipping from the coronary artery inlet, easily interfering with normal blood flow, and unable to dynamically adjust the anchoring length.

[0004] The objective of this invention is mainly achieved through the following technical solutions: A guiding catheter for interventional therapy includes a guiding catheter body and an anchoring device, the anchoring device being mounted on the guiding catheter body and used to anchor the guiding catheter body at the coronary artery inlet to reduce the risk of the guiding catheter slipping from the coronary artery inlet.

[0005] Furthermore, the anchoring device includes an anchoring mechanism located at the front end of the guiding catheter body, the anchoring mechanism being used to anchor the front end of the guiding catheter body at the coronary artery inlet.

[0006] Furthermore, the anchoring mechanism includes an anchoring element installed at the front end of the guiding tube body, the anchoring element being used to anchor the front end of the guiding tube body at the coronary artery inlet.

[0007] Furthermore, the anchoring element includes an anchoring airbag that can be inserted into the coronary artery inlet. The expansion and contraction of the anchoring airbag can be controlled by inflating or deflating the anchoring airbag, thereby controlling the anchoring and release of the front end of the guiding tube body at the coronary artery inlet.

[0008] Furthermore, the anchoring mechanism also includes a support body, which is installed at the front end of the guide tube body and is used to install the anchoring airbag and provide support for the anchoring airbag.

[0009] Furthermore, the support body includes a support sleeve for mounting the anchoring airbag and providing radial support.

[0010] Furthermore, the anchoring device also includes an anchoring control mechanism located at the rear end of the guide tube body and connected to the anchoring mechanism. The anchoring control mechanism is used to control the anchoring and release of the anchoring mechanism and the coronary artery inlet.

[0011] Furthermore, the anchoring control mechanism includes an air nozzle, an air path, and a pressure regulating valve.

[0012] Furthermore, the air passage is embedded in the wall of the guide tube body, one end of the air passage is connected to the anchoring airbag, and the other end is connected to the air nozzle; the pressure regulating valve is installed in series in the air passage.

[0013] Furthermore, the anchoring control mechanism also includes a display airbag, which is installed in series on the air path and is connected to the anchoring airbag. The display airbag is used to synchronously and in real time display the volume change of the anchoring airbag.

[0014] The technical solution of this invention can achieve at least one of the following effects: (1) The present invention provides a guiding catheter for interventional treatment, comprising a guiding catheter body and an anchoring device. The anchoring device is installed on the guiding catheter body to stably anchor the guiding catheter body at the entrance of the coronary artery, thereby reducing the risk of the guiding catheter slipping from the entrance of the coronary artery, thereby reducing the difficulty of the interventional device entering the coronary artery through the guiding catheter, and thus improving the safety and efficiency of the operation.

[0015] (2) The anchoring airbag of the present invention is a multi-segment annular structure. The anchoring airbag includes multiple interconnected inflatable cavities. Each inflatable cavity is distributed circumferentially along the support sleeve. The support sleeve between adjacent inflatable cavities is provided with a channel, which forms a non-closed annular support structure to keep the coronary artery inlet unobstructed, so that blood can flow continuously through the channel, thereby reducing the interference of the guide tube body on the normal flow of blood when anchored at the coronary artery inlet.

[0016] (3) The anchoring device of the present invention also includes a length adjustment mechanism, which is used to dynamically adjust the anchoring length of the anchoring mechanism according to the anatomical characteristics of the coronary artery and the real-time needs during the operation, so as to accurately match the coronary artery length of different patients and reduce the risk of vascular wall compression damage caused by excessive anchoring length or anchoring failure caused by excessive anchoring length.

[0017] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0018] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic diagram of the guiding tube structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the anchoring mechanism according to Embodiment 1 of the present invention; Figure 3 This is a cross-sectional view of the anchoring mechanism according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the anchoring control mechanism according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the anchoring mechanism in Embodiment 2 of the present invention; Figure 6 This is a cross-sectional view of the anchoring mechanism according to Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the anchoring mechanism in Embodiment 3 of the present invention; Figure 8 This is a cross-sectional view of the anchoring mechanism of Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the controller structure of Embodiment 3 of the present invention; Figure 10 This is a cross-sectional view of the actuator according to Embodiment 3 of the present invention; Figure 11 This is a cross-sectional view of the air bag in Embodiment 3 of the present invention.

[0020] Figure label: 1-Guide tube body; 2-Anchoring device; 21-Anchoring mechanism; 211-Anchoring component; 2111-Inflation chamber section; 212-Support body; 2121-Channel; 22-Anchoring control mechanism; 221-Air nozzle; 222-Air passage; 223-Pressure regulating valve; 23-Length adjustment mechanism; 231-Actuator; 2311-Extension assembly; 23111-First support plate; 23112-Second support plate; 23113-First sealing membrane; 23114-Second sealing membrane; 2312-Reset spring; 232-Regulator; 2321-Inflation valve; 2322-Air pipe; 2323-Exhaust valve; 233-Diaphragm. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0022] Example 1 To address the problem of existing guiding catheters easily slipping out of the coronary artery inlet, a specific embodiment of the present invention discloses a guiding catheter for interventional treatment, which is implanted into the patient's coronary artery under the guidance of a guidewire (a guidewire in the prior art) to establish an instrument channel for the interventional procedure, such as... Figure 1 As shown, the device includes a guiding catheter body 1 and an anchoring device 2. The anchoring device 2 is installed on the guiding catheter body 1 and is used to stably anchor the guiding catheter body 1 at the entrance of the coronary artery to reduce the risk of the guiding catheter slipping from the entrance of the coronary artery, thereby reducing the difficulty of the interventional device entering the coronary artery through the guiding catheter, and thus improving the safety and efficiency of the operation.

[0023] Preferably, the anchoring device 2 includes an anchoring mechanism 21, which is located at the front end of the guiding tube body 1 (i.e., the end of the guiding tube inserted into the human body during use). The anchoring mechanism 21 is used to stably anchor the front end of the guiding tube body 1 at the coronary artery inlet, thereby achieving stable anchoring of the guiding tube body 1 at the coronary artery inlet, reducing the risk of the guiding tube slipping from the coronary artery inlet, and thus reducing the difficulty of the interventional device entering the coronary artery through the guiding tube, thereby improving the safety and efficiency of the operation.

[0024] Preferably, such as Figure 2 and Figure 3 As shown, the anchoring mechanism 21 includes an anchoring element 211, which is installed at the front end of the guiding tube body 1. The anchoring element 211 is used to stably anchor the front end of the guiding tube body 1 at the coronary artery inlet, thereby achieving stable anchoring of the guiding tube body 1 at the coronary artery inlet.

[0025] Preferably, the anchoring element 211 is an anchoring balloon, which can be inserted into the coronary artery inlet. By inflating or deflating the anchoring balloon, the expansion and contraction of the anchoring balloon can be controlled, thereby achieving precise anchoring and release of the front end of the guiding tube body 1 at the coronary artery inlet. Specifically, when the anchoring balloon is inflated, the outer wall of the balloon closely adheres to the inner wall of the coronary artery inlet, forming a stable mechanical support, thereby achieving stable mechanical anchoring to firmly anchor the front end of the guiding tube body 1 at the coronary artery inlet. After deflating, the anchoring balloon quickly contracts, that is, it quickly releases the anchoring constraint on the front end of the guiding tube body 1, making it easy for medical personnel to quickly and smoothly retract or continue to advance the guiding tube body 1, with a rapid operation response.

[0026] Preferably, the anchoring airbag is an integrated annular structure, which allows the anchoring airbag to adjust its fit according to individual differences in the diameter of the coronary artery inlet after inflation, so as to ensure a balanced distribution of anchoring force, reduce local stress concentration that could lead to vascular damage, and also reduce the risk of unilateral displacement or torsional slippage of the anchoring airbag, thereby improving the stability and reliability of the anchoring constraint on the front end of the guide tube body 1.

[0027] Preferably, in order to solve the problem of poor stability of the anchoring airbag during inflation and anchoring, the anchoring mechanism 21 further includes a support body 212. The support body 212 is installed at the front end of the guide tube body 1 and is used to install the anchoring airbag and provide radial support for the anchoring airbag, so as to improve the structural stability and anti-collapse ability of the anchoring airbag in the inflated state, thereby further improving the reliability of the anchoring airbag in maintaining its fit with the inner wall of the coronary artery in complex anatomical structures, and further improving the stability and durability of the anchoring effect.

[0028] Preferably, the support body 212 is a support sleeve, which is fixedly installed at the front end of the guide tube body 1 and is used to install the anchoring airbag and provide radial rigid support to improve the structural stability and anti-collapse ability of the anchoring airbag in the inflated state.

[0029] Preferably, the support sleeve is a rigid annular bracket, the outer circumferential surface of the support sleeve is tightly fitted with the annular inner wall of the anchoring airbag, and the support sleeve is coaxial with the anchoring airbag, so that the anchoring airbag can expand evenly after inflation, thereby achieving uniform stress transmission, preventing the anchoring airbag from deforming and becoming unstable due to local stress distortion, and thus maintaining a reliable radial anchoring force, thereby further improving the stability of the anchoring.

[0030] Preferably, the anchoring device 2 further includes an anchoring control mechanism 22, which is located at the rear end of the guide tube body 1 (i.e., the end of the guide tube that is closer to the human body when in use) and connected to the anchoring mechanism 21. The anchoring control mechanism 22 is used to control the anchoring and release actions of the anchoring mechanism 21 and the coronary artery inlet, thereby enabling medical staff to make real-time, rapid and precise control over the anchoring state of the guide tube body 1, and improving the safety and efficiency of surgical operations.

[0031] Preferably, such as Figure 4 As shown, the anchoring control mechanism 22 includes an air nozzle 221, an air passage 222, and a pressure regulating valve 223. The air passage 222 is embedded in the wall of the guide tube body 1, with one end connected to the anchoring airbag and the other end connected to the air nozzle 221. It connects to an external inflation device (such as a syringe or air pump) through the air nozzle 221, inflating the anchoring airbag via the air passage 222. The pressure regulating valve 223 is installed in series in the air passage 222 and is used to quickly release gas from the anchoring airbag. The pressure regulating valve 223 works in conjunction with the external inflation device. This allows for precise adjustment of the pressure inside the anchoring balloon, thereby accurately controlling the degree of balloon inflation. This reduces the risk of vascular wall damage caused by over-inflation of the anchoring balloon, as well as the risk of anchoring failure due to insufficient pressure. Furthermore, the rapid release of gas from the anchoring balloon via the pressure regulating valve 223 causes the balloon to contract quickly, thus rapidly releasing the anchoring constraint on the front end of the guiding tube body 1. This facilitates the smooth retraction, continued advancement, or repositioning of the guiding tube body 1 by medical personnel, improving operational response speed and ultimately enhancing surgical efficiency.

[0032] Preferably, to address the issue of insufficient controllability of the anchoring airbag, the anchoring control mechanism 22 further includes a display airbag (not shown in the figure). The display airbag is connected in series on the air passage 222 so that the display airbag is connected to the anchoring airbag. This allows the volume change of the display airbag to be synchronized with the anchoring airbag in real time. By observing the expansion or contraction of the display airbag, medical personnel can intuitively judge the current pressure level and working status of the anchoring airbag, improving the visualization and controllability of the anchoring operation and further reducing operational errors and intraoperative risks.

[0033] Preferably, in order to solve the problem of easy slippage of the anchoring balloon, the anchoring balloon is provided with an anti-slip structure. The anti-slip structure enhances the friction between the anchoring balloon and the inner wall of the blood vessel, further suppressing the axial micro-displacement and rotational deviation of the guide tube body 1 during blood flow impact or device pushing process.

[0034] Preferably, the anti-slip structure is an anti-slip texture or an anti-slip protrusion.

[0035] Example 2 To address the issue that the guiding catheter body 1 can easily cause blockage of the coronary artery inlet when anchored, interfering with normal blood flow, Example 2 further improves the anchoring balloon and support sleeve in Example 1, such as... Figure 5 and Figure 6 As shown, the anchoring airbag has a multi-segment annular structure. The anchoring airbag includes multiple interconnected inflatable cavity segments 2111. Each inflatable cavity segment 2111 is distributed at intervals along the circumference of the support sleeve. The support sleeve between adjacent inflatable cavity segments 2111 is provided with a channel 2121. The channel 2121 forms a non-closed annular support structure to keep the coronary artery inlet unobstructed, so that blood can flow continuously through the channel 2121, thereby reducing the interference of the guiding tube body 1 on the normal blood flow when anchored at the coronary artery inlet.

[0036] Preferably, in order to solve the problem of unbalanced anchoring force distribution caused by unreasonable layout of multiple inflatable segments 2111, the multiple inflatable segments 2111 are arranged in a uniform circumferential pattern. During the inflation process, each segment expands synchronously, so that each inflatable segment 2111 can adjust its fit according to the individual differences in the diameter of the coronary artery inlet after inflation, so as to achieve a balanced distribution of anchoring force, reduce local stress concentration that could lead to vascular damage, and also reduce the risk of unilateral displacement or torsional slippage of the anchoring balloon, thereby improving the stability and reliability of the anchoring constraint on the front end of the guide tube body 1.

[0037] Example 3 To address the issue that the anchoring mechanism 21 cannot dynamically adjust its anchoring length based on coronary artery anatomy and real-time intraoperative needs, Embodiment 3 is a further improvement upon Embodiments 1 and / or 2. Figure 7 As shown, the anchoring device 2 also includes a length adjustment mechanism 23. The length adjustment mechanism 23 is used to dynamically adjust the anchoring length of the anchoring mechanism 21 according to the anatomical characteristics of the coronary artery and the real-time needs during the operation, so as to accurately match the coronary artery length of different patients and reduce the risk of vascular wall compression damage caused by excessive anchoring length or anchoring failure caused by excessive anchoring length.

[0038] Preferably, the support body 212 includes a plurality of support sleeves.

[0039] Preferably, the anchoring airbag is mounted on the outer periphery of a plurality of support sleeves.

[0040] Preferably, such as Figure 8 and Figure 9As shown, the length adjustment mechanism 23 includes an actuator 231 and a regulator 232. The actuator 231 is installed between two adjacent support sleeves and is used to adjust the axial distance between the two adjacent support sleeves. The regulator 232 is located at the rear end of the guide tube body 1 and is connected to the actuator 231. The actuator 231 is used to control the action of the actuator 231 to adjust the axial distance between the two adjacent support sleeves, thereby dynamically adjusting the overall axial coverage length of the anchoring balloon, so as to realize the dynamic adjustment of the anchoring length of the anchoring mechanism 21 according to the anatomical characteristics of the coronary artery and the real-time needs during the operation.

[0041] Preferably, such as Figure 10 As shown, the actuator 231 includes an extension assembly 2311 and a return spring 2312. The two ends of the extension assembly 2311 are fixedly connected to two adjacent support sleeves, and it is also connected to a controller 232. The controller 232 can drive the extension assembly 2311 to extend. The two ends of the return spring 2312 are fixedly connected to two adjacent support sleeves, and it applies an elastic tension to the two adjacent support sleeves. When the controller 232 drives the extension assembly 2311 to extend, the two adjacent support sleeves move away from each other axially, the return spring 2312 is stretched and stores energy, and simultaneously anchors the gas... The overall axial coverage length of the balloon increases accordingly; when the controller 232 is deactivated, the return spring 2312 releases elastic potential energy, driving the two adjacent support sleeves to return to their original position along the axial direction, and the extension component 2311 retracts and returns to its original position, and the overall axial coverage length of the anchoring balloon decreases synchronously; through the synergistic effect of the extension component 2311 and the return spring 2312, the axial distance between the two adjacent support sleeves can be adjusted, thereby dynamically adjusting the overall axial coverage length of the anchoring balloon, and realizing the dynamic and precise adjustment and control of the anchoring length of the anchoring mechanism 21 according to the anatomical characteristics of the coronary artery and the real-time needs during the operation.

[0042] Preferably, to address the issue of insufficient passage through narrow blood vessels in the anchoring structure, the extension component 2311 includes multiple air bags, which are connected in series and interconnected. When air is inflated into the air bags via the regulator 232, the air bags expand progressively, pushing two adjacent support sleeves axially away from each other. When the air is released from the air bags via the regulator 232, the air bags contract and reset under the action of the return spring 2312, causing the two adjacent support sleeves to move axially closer together, thereby achieving rapid adjustment of the anchoring length. Furthermore, the space occupied by the two air bags connected in series is smaller after contraction, facilitating compact storage of the overall structure, reducing volume, and improving the passage and fitting accuracy of the guide tube in narrow blood vessels.

[0043] Preferably, the air bag includes a first support plate 23111, a second support plate 23112, a first sealing film 23113, a second sealing film 23114, a third sealing film, and a fourth sealing film. The first support plate 23111 and the second support plate 23112 are arranged opposite to each other. The first sealing film 23113 is sealed to the first support plate 23111 and the second support plate 23112 on both sides, and the second sealing film 23114 is sealed to the first support plate 23111 and the second support plate 23112 on both sides, and the second sealing film 23114 is sealed to the first support plate 23111 and the second support plate 23112 on both sides. Sealing membrane 23114 is arranged opposite to and spaced apart from the first sealing membrane 23113; the two sides of the third sealing membrane are respectively sealed to the first support plate 23111 and the second support plate 23112, and the two sides of the third sealing membrane are also respectively sealed to the first sealing membrane 23113 and the second sealing membrane 23114; the two sides of the fourth sealing membrane are respectively sealed to the first support plate 23111 and the second support plate 23112, and the two sides of the fourth sealing membrane are also respectively sealed to the first sealing membrane 23113 and the second sealing membrane 23114. Simultaneously, the fourth sealing membrane is arranged opposite to and spaced apart from the third sealing membrane; the first support plate 23111, the second support plate 23112, the first sealing membrane 23113, the second sealing membrane 23114, the third sealing membrane, and the fourth sealing membrane together form a sealed airbag cavity; the first support plate 23111 and the second support plate 23112 provide rigid support for the first sealing membrane 23113, the second sealing membrane 23114, the third sealing membrane, and the fourth sealing membrane, ensuring that the airbag forms a closed airbag cavity during inflation and deflation. The controllability is as follows: when inflated, the second sealing membrane 23114, the third sealing membrane, and the fourth sealing membrane bulge synchronously, pushing the first support plate 23111 and the second support plate 23112 away from each other, thereby achieving the axial elongation of the extension assembly 2311; when the gas is discharged, the second sealing membrane 23114, the third sealing membrane, and the fourth sealing membrane collapse synchronously under the traction of the return spring 2312, causing the first support plate 23111 and the second support plate 23112 to move closer together, thereby achieving the axial return and contraction of the extension assembly 2311.

[0044] Preferably, in order to further solve the problem of insufficient passage in narrow blood vessels of the anchoring structure, the first sealing membrane 23113 has a V-shaped crease structure. Through the V-shaped crease structure, the first sealing membrane 23113 precisely retracts along the crease path when the air bag is deflated, and folds between the first support plate 23111 and the second support plate 23112, and is housed within the outer contour of the first support plate 23111 and the second support plate 23112, thereby reducing the overall volume after shrinkage, thereby reducing the radial dimension of the anchoring device 2, and further improving the passage and anchoring flexibility of the anchoring device 2 in narrow cavities.

[0045] Preferably, the second sealing film 23114, the third sealing film and the fourth sealing film all adopt the same V-shaped fold structure design as the first sealing film 23113, so as to ensure that the four are neatly folded along the preset fold path at the same time during exhaust and reset, and nested between the two support plates.

[0046] Preferably, the regulator 232 includes an inflation valve 2321, an air tube 2322, and an exhaust valve 2323. The air tube 2322 is embedded in the wall of the guide tube body 1, with one end connected to the air bag and the other end connected to the inflation valve 2321. The air tube 2322 is connected to an external inflation device (such as a syringe or an air pump) through the inflation valve 2321, and the air bag is inflated through the air tube 2322. The exhaust valve 2323 is installed in series in the air tube 2322 and is used to quickly release the gas in the air bag. Through the coordinated action of the exhaust valve 2323 and the external inflation device, the pressure inside the air bag is regulated, thereby controlling the expansion of the air bag and regulating the axial displacement of the extension component 2311.

[0047] Preferably, in order to solve the problem of damage to the anchoring airbag and air bag caused by the return spring 2312 during long-term use, the length adjustment mechanism 23 further includes an elastic diaphragm 233. The diaphragm 233 is disposed between the return spring 2312 and the anchoring airbag and between the return spring 2312 and the air bag. Through the isolation effect of the diaphragm 233, direct contact between the return spring 2312 and the anchoring airbag and air bag is avoided, thereby avoiding mechanical wear on the surface of the anchoring airbag and air bag caused by the return spring 2312, avoiding damage to the anchoring airbag and air bag, and thus ensuring the long-term reliability and service life of the anchoring device 2.

[0048] Preferably, in order to solve the problem of poor accuracy in anchor length control, the anchoring airbag is also equipped with two marking rings, located at both ends of the anchoring airbag respectively. This allows the real-time position and inflation status of the anchoring airbag to be displayed on display equipment such as imaging machines, making it easier for the surgeon to accurately judge its degree of expansion and axial positioning in the body.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A guiding catheter for interventional therapy, characterized in that, It includes a guide tube body (1) and an anchoring device (2), the anchoring device (2) being mounted on the guide tube body (1) and used to anchor the guide tube body (1) at the coronary artery inlet to reduce the risk of the guide tube slipping from the coronary artery inlet.

2. The guiding catheter for interventional therapy according to claim 1, characterized in that, The anchoring device (2) includes an anchoring mechanism (21) located at the front end of the guiding tube body (1) and used to anchor the front end of the guiding tube body (1) at the coronary artery inlet.

3. A guiding catheter for interventional therapy according to claim 2, characterized in that, The anchoring mechanism (21) includes an anchor (211) which is installed at the front end of the guide tube body (1) and is used to anchor the front end of the guide tube body (1) at the coronary artery inlet.

4. A guiding catheter for interventional therapy according to claim 3, characterized in that, The anchoring element (211) includes an anchoring airbag that can be inserted into the coronary artery inlet. The expansion and contraction of the anchoring airbag can be controlled by inflating or deflating the anchoring airbag, thereby controlling the anchoring and release of the front end of the guiding tube body (1) at the coronary artery inlet.

5. A guiding catheter for interventional therapy according to claim 4, characterized in that, The anchoring mechanism (21) further includes a support (212), which is installed at the front end of the guide tube body (1) and is used to install the anchoring airbag and provide support for the anchoring airbag.

6. A guiding catheter for interventional therapy according to claim 5, characterized in that, The support (212) includes a support sleeve for mounting the anchoring airbag and providing radial support.

7. A guiding catheter for interventional therapy according to any one of claims 3 to 6, characterized in that, The anchoring device (2) further includes an anchoring control mechanism (22), which is located at the rear end of the guide tube body (1) and connected to the anchoring mechanism (21). The anchoring control mechanism (22) is used to control the anchoring and release of the anchoring mechanism (21) and the coronary artery inlet.

8. A guiding catheter for interventional therapy according to claim 7, characterized in that, The anchoring control mechanism (22) includes an air nozzle (221), an air passage (222), and a pressure regulating valve (223).

9. A guiding catheter for interventional therapy according to claim 8, characterized in that, The air passage (222) is embedded in the wall of the guide tube body (1). One end of the air passage (222) is connected to the anchoring airbag, and the other end is connected to the air nozzle (221). The pressure regulating valve (223) is installed in series in the air passage (222).

10. A guiding catheter for interventional therapy according to claim 9, characterized in that, The anchoring control mechanism (22) also includes a display airbag, which is installed in series on the air passage (222). The display airbag is connected to the anchoring airbag and is used to synchronously display the volume change of the anchoring airbag in real time.

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