Dimension-adjustable vascular intervention dilation device for department of cardiology

Abstract

The invention relates to the technical field of cardiovascular diseases, and discloses a size-adjustable cardiology department vascular intervention dilation device which comprises a preset supporting wire, a catheter length adjusting mechanism is arranged outside a flexible catheter, the top of a bottom plate is rotationally connected with a bayonet socket, a fixing shaft is inserted into the top of the bayonet socket, and the top of the fixing shaft is fixedly connected with the supporting wire. And a guide pipe winding ring is fixedly installed outside the fixing shaft, a threaded fixing ring is fixedly installed at the top of the bottom plate, and the inner side of the threaded fixing ring is in threaded connection with a protection cylinder. According to the size-adjustable vascular intervention expansion device for the department of cardiology, a limiting knob is pulled upwards, a limiting insertion rod is separated from a limiting insertion hole of a limiting disc, a fixing shaft is rotated to drive a catheter winding ring to rotate, redundant flexible catheters are wound in an annular winding groove, or the wound catheters are released to increase the length, and the limiting knob is loosened after adjustment; limiting insertion rods are inserted into corresponding limiting insertion holes to complete fixation, the requirements of different patients and surgical sites are met, and redundancy of too long parts or insufficient too short parts is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cardiovascular diseases, and in particular to a cardiology vascular intervention dilation device with adjustable size. Background Art

[0002] In the treatment of cardiovascular diseases, vascular interventional dilation is a commonly used treatment method. It dilates the blood vessels by sending an expansion device into the narrowed or blocked parts of the blood vessels to restore blood circulation. Currently, existing vascular interventional dilation devices have certain limitations in size adjustment.

[0003] The length of the flexible catheter of the existing vascular intervention dilation device is mostly fixed. Due to the differences in body shape and vascular direction of different patients, as well as the different vascular locations that need to be reached during surgery, the fixed-length flexible catheter may not be able to adapt well to the surgical needs. A catheter that is too long is prone to redundancy during operation, affecting the flexibility and accuracy of the operation; a catheter that is too short may not be able to reach the lesion site, causing inconvenience to the surgery. Therefore, a cardiology vascular intervention dilation device with adjustable size is proposed. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides an adjustable-size cardiology vascular intervention dilation device with the advantages of precise size adjustment and good stability. It solves the problem that the length of the flexible catheter of the existing vascular intervention dilation device is mostly fixed. Due to differences in body shape and vascular direction of different patients, as well as different vascular locations that need to be reached during surgery, the fixed-length flexible catheter may not be able to adapt well to surgical needs. A catheter that is too long is prone to redundancy during operation, affecting the flexibility and accuracy of the operation; a catheter that is too short may not be able to reach the lesion site, causing inconvenience to the surgery.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose of being able to precisely adjust the size and having good stability, the present invention provides the following technical solution: a size-adjustable cardiology vascular intervention dilation device, comprising a pre-placed support wire, a one-way valve fixedly installed on the outside of the pre-placed support wire, a connector fixedly installed on the left side of the pre-placed support wire, a flexible catheter fixedly installed on the left side of the connector, a balloon fixedly installed on the left side of the flexible catheter, and a catheter length adjustment mechanism provided on the outside of the flexible catheter;

[0008] The catheter length adjustment mechanism includes a base plate, a socket, a fixed shaft, a catheter winding ring, a threaded fixing ring, a protective tube, an extension groove, a top plate, a limit plate, a limit knob, a limit rod, a limit jack, a limit sleeve, a tension spring, a connecting shaft, a clamping ring, a rubber clamping piece and a double-sided adhesive tape. The top of the base plate is rotatably connected to the socket, the top of the socket is plugged with a fixed shaft, the outside of the fixed shaft is fixedly installed with a catheter winding ring, the top of the base plate is fixedly installed with a threaded fixing ring, the inner side of the threaded fixing ring is threadedly connected to a protective tube, the left and right sides of the protective tube are provided with extension grooves, and the top of the protective tube is fixedly installed with a top The top of the top plate is fixedly installed with a limit disk, the top outer surface of the fixed shaft is slidably connected to the limit knob, the bottom of the limit knob is fixedly installed with two limit rods, the interior of the limit disk is provided with a number of limit holes, the bottom of the bottom plate is fixedly installed with a limit sleeve, the interior of the limit sleeve is fixedly installed with a tension spring, the interior of the limit sleeve is slidably connected with a connecting shaft, and the top of the connecting shaft is fixedly connected to the bottom of the tension spring, the bottom of the connecting shaft is fixedly installed with a clamping ring, the top of the clamping ring is fixedly installed with a rubber clamping piece, and the bottom of the clamping ring is fixedly installed with a double-sided tape.

[0009] Preferably, the flexible conduit extends from the extension groove on one side of the protective tube to the inside of the protective tube, is wound around the outside of the conduit winding ring, and then extends from the extension groove on the other side of the protective tube to the outside of the protective tube; the width of the extension groove is adapted to the outer diameter of the flexible conduit, and the inner side wall of the extension groove is provided with a circular arc transition surface.

[0010] Preferably, the main body of the fixed shaft is a cylindrical structure, the bottom of which is a cross-shaped plug structure and the top is a square rod structure; the top of the socket is provided with a cross slot that is compatible with the cross-shaped plug at the bottom of the fixed shaft, and the cross-shaped plug is interference fit with the cross slot; the middle of the top plate and the limit plate are provided with rectangular through holes that are compatible with the square rod at the top of the fixed shaft, and the middle of the limit knob is provided with a rectangular sliding hole that is slidably compatible with the square rod at the top of the fixed shaft.

[0011] Preferably, the limiting sockets are distributed in a circular array on the top of the limiting plate, and the number of the limiting sockets is not less than 12; the outer diameter of the limiting rod is adapted to the inner diameter of the limiting sockets, and a hemispherical guide head is provided at the bottom of the limiting rod.

[0012] Preferably, an annular winding groove is provided on the outside of the catheter winding ring, the cross-section of the annular winding groove is U-shaped, and the depth of the U-shaped groove is not less than 1.2 times the outer diameter of the flexible catheter; the inner wall of the annular winding groove is provided with a medical silicone layer, and the thickness of the silicone layer is 0.3-0.5 mm.

[0013] Preferably, the protective tube is made of transparent medical plastic material, its height is not less than the height of the catheter winding ring, and the distance between the inner wall of the protective tube and the outer wall of the catheter winding ring is 2-5mm; the outer wall of the threaded fixing ring is provided with anti-slip ribs, and the ribs are distributed along the axial direction of the threaded fixing ring.

[0014] Preferably, there are two rubber clamping pieces, which are fixedly mounted on the bottom of the base plate and the top of the clamping ring respectively. The rubber clamping piece is an annular structure, and its surface is provided with dotted protrusions; the bottom of the double-sided adhesive tape is covered with release paper, and the edge of the release paper is provided with an extended ear piece for easy tearing.

[0015] Preferably, the capsule is made of medical elastic rubber, is hollow inside and communicates with the internal channel of the flexible catheter; the outer surface of the capsule is provided with anti-slip lines, and the anti-slip lines are distributed in a spiral shape along the axial direction of the capsule.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a size-adjustable cardiology vascular interventional dilation device with the following beneficial effects:

[0018] 1. This size-adjustable cardiology vascular interventional dilation device can flexibly adjust the length of the flexible catheter through the catheter length adjustment mechanism: pull the limit knob upward to disengage the limit rod from the limit socket of the limit disk, rotate the fixed shaft to drive the catheter winding ring to rotate, and wind the excess flexible catheter into the annular winding groove, or release the wound catheter to increase the length. After adjustment, loosen the limit knob, insert the limit rod into the corresponding limit socket to complete the fixation, adapting to the needs of different patients and surgical sites, and avoiding excessive length or insufficient length.

[0019] 2. This size-adjustable cardiology vascular interventional dilation device uses a tension spring inside the limiting sleeve to provide elastic tension, allowing the connecting shaft to drive the clamping ring to tighten upward. At this time, the two rubber clamping pieces at the bottom of the base plate and the top of the clamping ring can clamp and fix plate-like fixed surfaces such as the edge of the operating table and the instrument tray. The dot-shaped protrusions can enhance friction and prevent slippage. If the fixed surface is flat, the release paper at the bottom of the double-sided tape can be torn off and fixed by gluing. Both methods can be selected as needed to ensure that the device is stable and does not shift during operation, avoid catheter shaking that affects accuracy, and improve surgical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the catheter length adjustment mechanism of the present invention;

[0022] Figure 3A three-dimensional schematic diagram of the catheter length adjustment mechanism of the present invention;

[0023] Figure 4 A three-dimensional schematic diagram of the catheter winding ring of the present invention;

[0024] Figure 5 A three-dimensional schematic diagram of the limiting plate of the present invention;

[0025] Figure 6 For the present invention Figure 2 A is an enlarged schematic diagram.

[0026] In the figure: 1. Pre-set support wire; 2. One-way valve; 3. Connector; 4. Flexible catheter; 5. Bag; 6. Catheter length adjustment mechanism; 601. Bottom plate; 602. Connector; 603. Fixed shaft; 604. Catheter winding ring; 605. Threaded fixing ring; 606. Protective tube; 607. Extension groove; 608. Top plate; 609. Limiting plate; 610. Limiting knob; 611. Limiting rod; 612. Limiting socket; 613. Limiting sleeve; 614. Tension spring; 615. Connecting shaft; 616. Clamping ring; 617. Rubber clamping sheet; 618. Double-sided tape. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-6 A size-adjustable cardiology vascular interventional dilation device includes a pre-placed support wire 1, a one-way valve 2 is fixedly installed on the outside of the pre-placed support wire 1, a connector 3 is fixedly installed on the left side of the pre-placed support wire 1, a flexible catheter 4 is fixedly installed on the left side of the connector 3, a balloon 5 is fixedly installed on the left side of the flexible catheter 4, and a catheter length adjustment mechanism 6 is provided on the outside of the flexible catheter 4;

[0029] The catheter length adjustment mechanism 6 includes a base plate 601, a socket 602, a fixed shaft 603, a catheter winding ring 604, a threaded fixing ring 605, a protective tube 606, an extension slot 607, a top plate 608, a limit plate 609, a limit knob 610, a limit plug rod 611, a limit socket 612, a limit sleeve 613, a tension spring 614, a connecting shaft 615, a clamping ring 616, a rubber clamping piece 617 and a double-sided adhesive tape 618. The top of the base plate 601 is rotatably connected to the socket 602, the top of the socket 602 is plugged with the fixed shaft 603, the outer part of the fixed shaft 603 is fixedly installed with the catheter winding ring 604, the top of the base plate 601 is fixedly installed with a threaded fixing ring 605, the inner side of the threaded fixing ring 605 is threadedly connected to the protective tube 606, and the left and right sides of the protective tube 606 are provided with extension slots 607. The top of the protective tube 606 is fixedly installed with a top plate 608, the top of the top plate 608 is fixedly installed with a limit disk 609, the top outer surface of the fixed shaft 603 is slidably connected to the limit knob 610, the bottom of the limit knob 610 is fixedly installed with two limit rods 611, the interior of the limit disk 609 is provided with a number of limit holes 612, the bottom of the bottom plate 601 is fixedly installed with a limit sleeve 613, the interior of the limit sleeve 613 is fixedly installed with a tension spring 614, the interior of the limit sleeve 613 is slidably connected with a connecting shaft 615, and the top of the connecting shaft 615 is fixedly connected to the bottom of the tension spring 614, the bottom of the connecting shaft 615 is fixedly installed with a clamping ring 616, the top of the clamping ring 616 is fixedly installed with a rubber clamping piece 617, and the bottom of the clamping ring 616 is fixedly installed with a double-sided tape 618

[0030] Example 1:

[0031] To explain in detail the process of adjusting the length of the flexible catheter 4 by the catheter length adjustment mechanism 6 , the working principle thereof will be described below in conjunction with the coordination relationship of the various components.

[0032] The flexible catheter 4 is the key channel connecting the connector 3 and the bladder 5. Its length must be flexibly adjusted based on the patient's body shape, vascular orientation, and surgical site. In the catheter length adjustment mechanism 6, the flexible catheter 4 enters through the extension slot 607 on one side of the protective tube 606, winds within the annular winding groove of the catheter winding ring 604, and then extends outward through the extension slot 607 on the other side, forming a complete closed path.

[0033] The cross-section of the annular winding groove is U-shaped, the groove depth is not less than 1.2 times the outer diameter of the flexible catheter 4, and the inner wall is provided with a 0.3-0.5mm thick medical silicone layer, which can not only stably wrap the catheter, but also avoid wear on the flexible catheter 4 during the winding process.

[0034] When adjusting, first pull the limit knob 610 upwards. At this time, the limit knob 610 slides upwards along the square rod at the top of the fixed shaft 603, driving the two limit rods 611 at the bottom to disengage from the limit holes 612 on the limit plate 609, thereby releasing the rotation restriction on the fixed shaft 603.

[0035] Since the bottom of the fixed shaft 603 is a cross-shaped plug structure, it has an interference fit with the cross slot at the top of the socket 602. Rotating the fixed shaft 603 can synchronously drive the external catheter winding ring 604 to rotate: if the flexible catheter 4 needs to be shortened, rotate the fixed shaft 603 clockwise to wrap the excess catheter in the annular winding groove; if it needs to be extended, rotate it counterclockwise to release the wrapped catheter.

[0036] After the adjustment is completed, release the limit knob 610, and under the action of its own gravity, the limit rod 611 is inserted into the corresponding limit hole 612 on the limit disk 609; the limit holes 612 are distributed in a circular array on the top of the limit disk 609 and the number is not less than 12. Combined with the hemispherical guide head at the bottom of the limit rod 611, precise positioning can be achieved to ensure that the length of the flexible catheter 4 is fixed, avoiding length changes due to loosening of the catheter during surgery.

[0037] Example 2:

[0038] The adaptation between the fixed shaft 603 and the limiting assembly is the core to ensure the stability of the adjustment. The structure and matching relationship are described in detail below.

[0039] The fixed shaft 603 adopts a segmented structural design: the main body is cylindrical, the bottom is a cross-shaped plug, and the top is a square rod; this structure enables it to precisely match multiple components:

[0040] The cross-shaped plug at the bottom is interference-fitted with the cross-shaped slot at the top of the socket 602, which not only achieves stable installation of the fixed shaft 603 but also ensures synchronization during rotation to avoid slipping;

[0041] The square rod at the top passes through the rectangular through-holes in the middle of the top plate 608 and the limit plate 609, and is slidably adapted to the rectangular sliding hole in the middle of the limit knob 610. The rectangular structure limits the relative rotation between the limit knob 610 and the fixed shaft 603, ensuring that when the fixed shaft 603 is rotated, the limit knob 610 can rotate synchronously with it, and when the limit knob 610 is pulled upward, only axial sliding occurs, and the circumferential position is not affected.

[0042] The limit plate 609 is fixedly installed on the top of the top plate 608, and the limit holes 612 opened inside it are distributed in a circular array, with a number of not less than 12. The angular interval between adjacent limit holes 612 ensures the accuracy of length adjustment. The smaller the interval, the higher the adjustment accuracy.

[0043] The outer diameter of the two limit rods 611 at the bottom of the limit knob 610 is adapted to the inner diameter of the limit socket 612, and a hemispherical guide head is provided at the bottom, which can reduce the resistance when the rods are inserted into the socket, making the operation smoother.

[0044] When the limiting rod 611 is inserted into the limiting hole 612 , the rotation of the fixed shaft 603 is limited by mechanical locking, thereby locking the position of the catheter winding ring 604 and fixing the length of the flexible catheter 4 .

[0045] In addition, the top plate 608 is fixedly installed on the top of the protective tube 606, and together with the bottom plate 601 and the protective tube 606, it forms a closed space, providing a stable installation base for components such as the fixed shaft 603 and the catheter winding ring 604, while preventing external impurities from entering and affecting the operation of internal components.

[0046] Example 3:

[0047] The protective tube 606 and the extension groove 607 are key structures for protecting the flexible conduit 4 and ensuring its smooth movement. The design principles thereof are described below.

[0048] The protective tube 606 is made of transparent medical plastic material, and its height is not less than the height of the catheter winding ring 604. The distance between the inner wall and the outer wall of the catheter winding ring 604 is 2-5 mm.

[0049] The transparent material makes it easy for medical staff to observe the winding status of the flexible catheter 4 and detect winding abnormalities in time; the reasonable height and spacing design can completely cover the catheter winding ring 604, avoiding external collisions that may cause the catheter to fall off or winding disorder, and at the same time reserve sufficient space for the winding and release of the catheter to prevent jamming.

[0050] The extension grooves 607 opened on the left and right sides of the protective tube 606 are channels for the flexible conduit 4 to enter and exit the protective tube 606. The width of the extension grooves 607 is adapted to the outer diameter of the flexible conduit 4 to ensure that the conduit will not shake due to excessive gaps when passing through, nor will it cause extrusion and wear due to excessive tightening.

[0051] The inner wall of the extension groove 607 is provided with an arc transition surface, which can eliminate the friction of the sharp corners on the catheter, guide the catheter to smoothly enter and exit the protective tube 606, and further protect the outer surface of the flexible catheter 4 to avoid damage caused by long-term use or adjustment.

[0052] Example 4:

[0053] The clamping and fixing structure at the bottom of the base plate 601 achieves stable fixation of the device in two ways to ensure that the accuracy will not be affected by operational shaking during surgery. The principles are as follows.

[0054] The first fixing method is clamping fixation:

[0055] A limiting sleeve 613 is fixedly installed at the bottom of the base plate 601 , and a tension spring 614 is fixed inside the limiting sleeve 613 . The bottom of the tension spring 614 is fixedly connected to the top of a connecting shaft 615 that is slidably connected to the limiting sleeve 613 .

[0056] In the natural state, the tension spring 614 is in a contracted state, driving the bottom clamping ring 616 to tighten upward through the connecting shaft 615. At this time, the two annular rubber clamping pieces 617 at the bottom of the bottom plate 601 and the top of the clamping ring 616 form a mating structure.

[0057] Align the structure with a plate-like fixed surface such as the edge of an operating table or an instrument tray, pull the clamping ring 616 downward to stretch the tension spring 614, and release it after placing it on the fixed surface. The tension spring 614 will reset and tighten the clamping ring 616. The dot-shaped protrusions on the surface of the rubber clamping piece 617 can increase the friction with the fixed surface to prevent the device from slipping.

[0058] The second fixing method is pasting:

[0059] A double-sided adhesive tape 618 is fixedly mounted on the bottom of the clamping ring 616 , and the bottom thereof is covered with release paper with extended tabs.

[0060] When the fixing surface is a plane such as a surgical instrument table, the device can be stably fixed by extending the tabs, tearing off the release paper, and attaching the double-sided adhesive tape 618 to the plane.

[0061] This method is suitable for fixing scenarios without plate-like edges, complements the clamping fixing method, and improves the applicability of the device.

[0062] The two fixing methods can be flexibly selected according to the surgical environment to ensure that the catheter length adjustment mechanism 6 remains stable throughout the entire surgical process, providing a reliable basis for the length adjustment of the flexible catheter 4 and surgical operations.

[0063] To sum up, the adjustable size cardiology vascular interventional dilation device can flexibly adjust the length of the flexible catheter 4 through the catheter length adjustment mechanism 6: pull the limit knob 610 upward to disengage the limit rod 611 from the limit hole 612 of the limit disk 609, rotate the fixed shaft 603 to drive the catheter winding ring 604 to rotate, and wind the excess flexible catheter 4 in the annular winding groove, or release the wound catheter to increase the length. After adjustment, loosen the limit knob 610, and insert the limit rod 611 into the corresponding limit hole 612 to complete the fixation, adapting to the needs of different patients and surgical sites, and avoiding excessive redundancy or excessive shortness.

[0064] Furthermore, in this size-adjustable cardiology vascular interventional dilator, a tension spring 614 provides elastic tension within a limiting sleeve 613, causing the connecting shaft 615 to drive the clamping ring 616 to tighten upward. At this point, two rubber clamping pieces 617 at the bottom of the base plate 601 and the top of the clamping ring 616 can clamp and secure a flat surface, such as the edge of an operating table or an instrument tray. The dotted protrusions on these pieces enhance friction and prevent slippage. If the fixing surface is flat, the release paper at the bottom of the double-sided adhesive tape 618 can be removed and the device can be fixed by gluing. These two methods can be selected as needed to ensure the device is stable and does not shift during operation, preventing catheter shaking from affecting accuracy and improving surgical safety. This solves the problem that the flexible catheters of existing vascular interventional dilators are mostly fixed in length. Due to differences in patient body shape and vascular orientation, as well as the different vascular locations that need to be reached during surgery, fixed-length flexible catheters may not be well adapted to surgical needs. A catheter that is too long is prone to redundancy during operation, affecting operational flexibility and accuracy. A catheter that is too short may not be able to reach the lesion site, causing inconvenience to the surgeon.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A size-adjustable cardiology vascular interventional dilation device, comprising a pre-placed support wire (1), characterized in that: A one-way valve (2) is fixedly installed on the outside of the pre-placed support wire (1), a connector (3) is fixedly installed on the left side of the pre-placed support wire (1), a flexible catheter (4) is fixedly installed on the left side of the connector (3), a capsule (5) is fixedly installed on the left side of the flexible catheter (4), and a catheter length adjustment mechanism (6) is provided on the outside of the flexible catheter (4); The catheter length adjustment mechanism (6) comprises a bottom plate (601), a socket (602), a fixed shaft (603), a catheter winding ring (604), a threaded fixing ring (605), a protective tube (606), an extension groove (607), a top plate (608), a limiting plate (609), a limiting knob (610), a limiting rod (611), a limiting socket (612), a limiting sleeve (613), a tension spring (614), a connecting shaft (615), a clamping ring (616), a rubber clamping sheet (617), and a plurality of other components. ) and double-sided adhesive tape (618), the top of the bottom plate (601) is rotatably connected to a socket (602), the top of the socket (602) is plugged with a fixed shaft (603), the outside of the fixed shaft (603) is fixedly installed with a catheter winding ring (604), the top of the bottom plate (601) is fixedly installed with a threaded fixing ring (605), the inner side of the threaded fixing ring (605) is threadedly connected to a protective tube (606), and the left and right sides of the protective tube (606) are both provided with extension grooves (60 7), a top plate (608) is fixedly installed on the top of the protective tube (606), a limit plate (609) is fixedly installed on the top of the top plate (608), a limit knob (610) is slidably connected to the top outer surface of the fixed shaft (603), two limit rods (611) are fixedly installed on the bottom of the limit knob (610), a plurality of limit holes (612) are opened inside the limit plate (609), and a limit sleeve is fixedly installed on the bottom of the bottom plate (601). The limiting sleeve (613) is fixedly installed with a tension spring (614) inside, the limiting sleeve (613) is slidably connected with a connecting shaft (615) inside, and the top of the connecting shaft (615) is fixedly connected to the bottom of the tension spring (614), the bottom of the connecting shaft (615) is fixedly installed with a clamping ring (616), the top of the clamping ring (616) is fixedly installed with a rubber clamping piece (617), and the bottom of the clamping ring (616) is fixedly installed with a double-sided adhesive tape (618).

2. The size-adjustable cardiology vascular intervention dilation device according to claim 1, characterized in that: The flexible conduit (4) extends from the extension groove (607) on one side of the protective tube (606) to the inside of the protective tube (606), is wound around the outside of the conduit winding ring (604), and then extends from the extension groove (607) on the other side of the protective tube (606) to the outside of the protective tube (606); the width of the extension groove (607) is adapted to the outer diameter of the flexible conduit (4), and the inner side wall of the extension groove (607) is provided with an arc transition surface.

3. The size-adjustable cardiology vascular interventional dilation device according to claim 1, characterized in that: The main body of the fixed shaft (603) is a cylindrical structure, the bottom of which is a cross-shaped plug structure and the top is a square rod structure; the top of the socket (602) is provided with a cross slot adapted to the cross-shaped plug at the bottom of the fixed shaft (603), and the cross-shaped plug is interference-fitted with the cross slot; the middle of the top plate (608) and the limiting plate (609) are both provided with rectangular through holes adapted to the square rod at the top of the fixed shaft (603); the middle of the limiting knob (610) is provided with a rectangular sliding hole adapted to slide with the square rod at the top of the fixed shaft (603).

4. The size-adjustable cardiology vascular interventional dilation device according to claim 1, characterized in that: The limiting sockets (612) are distributed in a circular array on the top of the limiting plate (609), and the number of the limiting sockets (612) is not less than 12; the outer diameter of the limiting rod (611) is adapted to the inner diameter of the limiting sockets (612), and a hemispherical guide head is provided at the bottom of the limiting rod (611).

5. The size-adjustable cardiology vascular intervention dilation device according to claim 1, characterized in that: An annular winding groove is provided on the outside of the catheter winding ring (604), the cross-section of the annular winding groove is U-shaped, and the groove depth of the U-shaped groove is not less than 1.2 times the outer diameter of the flexible catheter (4); the inner side wall of the annular winding groove is provided with a medical silicone layer, and the thickness of the silicone layer is 0.3-0.5 mm.

6. The size-adjustable cardiology vascular intervention dilation device according to claim 1, characterized in that: The protective tube (606) is made of transparent medical plastic material, its height is not less than the height of the catheter winding ring (604), and the distance between the inner wall of the protective tube (606) and the outer wall of the catheter winding ring (604) is 2-5 mm; the outer wall of the threaded fixing ring (605) is provided with anti-slip ribs, and the ribs are distributed along the axial direction of the threaded fixing ring (605).

7. The size-adjustable cardiology vascular intervention dilation device according to claim 1, characterized in that: There are two rubber clamping pieces (617), which are fixedly mounted on the bottom of the base plate (601) and the top of the clamping ring (616), respectively. The rubber clamping piece (617) is an annular structure, and its surface is provided with dot-shaped protrusions; the bottom of the double-sided adhesive tape (618) is covered with release paper, and the edge of the release paper is provided with an extended ear piece for easy tearing.

8. The size-adjustable cardiology vascular intervention dilation device according to claim 1, characterized in that: The capsule (5) is made of medical elastic rubber, is hollow inside and communicates with the internal channel of the flexible catheter (4); the outer surface of the capsule (5) is provided with anti-slip patterns, and the anti-slip patterns are distributed in a spiral shape along the axial direction of the capsule (5).

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