An iron-based vascular stent balloon dilatation catheter

Abstract

The present invention belongs to the technical field of medical devices, and discloses an iron-based vascular stent balloon dilatation catheter, including a balloon catheter, a guide sheath is inserted inside the balloon catheter, a guide wire is inserted inside the guide sheath, a balloon stent is provided on the end of the balloon catheter inserted into the blood vessel, and a control component is provided on the ends of the balloon catheter and the guide sheath that are not inserted into the blood vessel; the control component includes a control body fixedly connected to the balloon catheter and the guide sheath, and a linkage disk is provided at one end of the control body. The present invention can limit the maximum movement range of the adjustment wheel through the positioning wheel under the cooperation of the intermittent main thread, that is, the maximum movement range of the linkage disk and the piston can be limited under the cooperation of the linkage limiting component, so that the maximum gas injection volume in the balloon catheter and the guide sheath is well controlled, ensuring the balloon dilation effect while greatly avoiding the situation of excessive expansion and damage to the blood vessel.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular is an iron-based vascular stent balloon dilatation catheter. Background Art

[0002] Currently, the vascular stent angioplasty widely used in clinical practice all adopts non-variable cylindrical stents. Anatomy and clinical practice have confirmed that the difference in diameter between the portal vein of liver transplant donors and recipients is an important factor affecting the occurrence of portal vein stenosis after liver transplantation in children and the success rate of clinical treatment with stent angioplasty. Since cylindrical non-variable stents cannot take into account the diameters of both the recipient and the donor at the same time, they may cause vascular damage and intimal hyperplasia, and increase the incidence of in-stent restenosis and even portal vein thrombosis.

[0003] In view of the above problems, vascular stent expansion catheters came into being. When installing a vascular stent, a guide wire is placed into the blood vessel through puncture, and then a balloon catheter wrapped with the stent is placed along the guide wire until the stent moves to the lesion site. The catheter balloon is then inflated to expand and open the external stent, so that the stent can be fixed in the blood vessel. However, as recorded above, there are differences in blood vessel diameters among different patients, and the balloon inflation volume is the main factor directly affecting the degree of stent expansion. At present, the gas injection of the vascular stent balloon expansion catheter mainly relies on manual operation by doctors, so the accuracy of the inflation volume is extremely limited, which not only increases unnecessary operational difficulty, but also poses a great safety hazard to patients if the operation is improper. Therefore, it is necessary to develop a new balloon catheter for vascular stent expansion to solve the above problems. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an iron-based vascular stent balloon dilatation catheter, which has the advantages of high precision and good safety.

[0005] Among them, with the cooperation of the intermittent main thread, the maximum movement range of the adjusting wheel can be limited by the positioning wheel, and the maximum movement range of the linkage disk and the piston can be limited with the cooperation of the linkage limiting component, so that the maximum gas injection volume in the balloon catheter and the guide sheath can be well controlled, ensuring the balloon expansion effect while greatly avoiding the damage of blood vessels due to excessive expansion.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an iron-based vascular stent balloon dilatation catheter, comprising a balloon catheter, a guide sheath is inserted inside the balloon catheter, a guide wire is inserted inside the guide sheath, a balloon stent is arranged at one end of the balloon catheter inserted into the blood vessel, a control component is arranged at one end of the balloon catheter not inserted into the blood vessel, and the end of the guide sheath not inserted into the blood vessel passes through the control component of the balloon catheter and is connected to another control component;

[0007] The balloon catheter is also provided with a pre-expansion balloon and a collection balloon, wherein the collection balloon is located on the side of the balloon stent outside close to the heart, and the pre-expansion balloon is located between the balloon stent and the collection balloon; the guide sheath is provided with a pushing assembly;

[0008] The collecting balloon comprises a shaping balloon, a collecting balloon and a limiting ring connected to the balloon catheter, wherein the shaping balloon, the collecting balloon and the limiting ring are smoothly connected end to end;

[0009] The pushing assembly includes a thrombus pushing balloon and a restriction ring pushing balloon arranged on the guide sheath tube, the thrombus pushing balloon and the restriction ring pushing balloon are both located outside the balloon catheter, the thrombus pushing balloon is located on a side of the guide sheath tube close to the heart, and the restriction ring pushing balloon is located on a side of the guide sheath tube far from the heart;

[0010] The balloon support, pre-expansion balloon and collection balloon are introduced with air through the operating assembly of the balloon catheter, and the thrombus pushing balloon and restriction ring pushing balloon are introduced with air through the operating assembly of the guide sheath, and the elastic flexibility of the balloon support, pre-expansion balloon and collection balloon increases in sequence;

[0011] The control assembly includes a control body fixedly connected to the balloon catheter and the guide sheath, a linkage disk is arranged at one end of the control body, an intermittent main thread is arranged on the outer surface of the control body, a positioning wheel and an adjusting wheel are movably sleeved on the outside of the control body, the positioning wheel and the adjusting wheel are connected to the control body through the intermittent main thread, and a linkage limiting assembly is connected between the adjusting wheel and the linkage disk;

[0012] The control body includes an injection tube fixedly connected to the outer ends of the balloon catheter and the guide sheath, an injection cavity is opened inside the injection tube, and the injection cavity is respectively connected to the balloon catheter and the guide sheath, a piston is sealed inside the injection cavity, and the piston is transmission-connected to the linkage disk through a linkage limiting component.

[0013] Preferably, the piston is internally movably sleeved with a sealed through tube, both ends of which pass through the piston and the injection cavity and are fixedly sleeved on both ends of the injection tube, and the guide sheath and guide wire are respectively movably arranged inside the corresponding sealed through tube.

[0014] Preferably, the adjusting wheel includes an adjusting knob movably sleeved on the outside of the injection tube, and an intermittent secondary thread is arranged inside the adjusting knob. The intermittent secondary thread is adapted to the intermittent main thread, and the length of the intermittent secondary thread is smaller than the distance between adjacent intermittent main threads.

[0015] Preferably, the positioning wheel is located at an end of the injection tube outside close to the blood vessel, and the adjustment knob is located at an end of the injection tube outside away from the blood vessel. The interior of the positioning wheel is provided with a complete continuous thread, and the continuous thread is adapted to the intermittent main thread.

[0016] Preferably, the linkage limiting assembly includes a linkage rotating clamp movably sleeved on the inside of the linkage disk, the outer surface of the linkage rotating clamp extends to the outside of the linkage disk on the side close to the injection tube and is fixedly connected to a plurality of evenly distributed linkage rods, the other end of the linkage rod is fixedly connected to the adjusting knob, and a plurality of evenly distributed limit slides are passed through the inside of the injection tube, one end of the limit slide is fixedly connected to the piston, and the other end of the limit slide passes through the injection cavity and extends to the outside of the injection tube and is fixedly connected to the linkage disk.

[0017] Preferably, the distances between the shaping capsule, the collecting capsule, the limiting ring and the pre-dilation balloon gradually increase.

[0018] Preferably, the length of the thrombus pushing balloon is greater than that of the limiting ring pushing balloon, the lengths of the balloon support and the pre-expansion balloon are matched, and the lengths of the balloon support and the pre-expansion balloon are greater than the length of the blood clot present in the blood vessel.

[0019] Preferably, the elastic flexibility of the thrombus pushing balloon is higher than the elastic flexibility of the limiting ring pushing balloon, and the elastic flexibility of the shaping balloon is greater than the elastic flexibility of the collecting balloon; the elastic flexibility of the pre-expansion balloon is greater than the elastic flexibility of the balloon inside the balloon stent, and the balloon inside the balloon stent begins to expand when the outer surface of the pre-expansion balloon is larger than the initial inner diameter of the blood clot.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Due to the setting of the control component of the present invention, the maximum movement range of the adjustment wheel can be limited by the positioning wheel with the cooperation of the intermittent main thread, that is, the maximum movement range of the linkage disk and the piston can be limited with the cooperation of the linkage limiting component, so that the maximum gas injection volume in the balloon catheter and the guide sheath can be well controlled, ensuring the balloon expansion effect while greatly avoiding the damage of blood vessels due to excessive expansion.

[0022] 2. Due to the setting of the collecting balloon of the present invention, with the cooperation of the limiting ring and the pushing balloon, the limiting ring, the collecting balloon and the shaping balloon can make the collecting balloon as a whole form a bowl shape open toward the thrombus, and then with the cooperation of the thrombus pushing balloon, the thrombus can be pushed into the bowl-shaped structure, thereby achieving the effect of wrapping the thrombus for discharge.

[0023] 3. Due to the design of the expansion rate of each balloon, the present invention enables each balloon to expand in sequence with the others as much as possible, thereby achieving their respective corresponding effects while avoiding the impact on the functions of other balloons as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a partial schematic diagram of the front end of the present invention;

[0026] Figure 3 It is a partial schematic diagram of the collecting balloon of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the control component of the present invention;

[0028] Figure 5 It is a front view of the control assembly of the present invention;

[0029] Figure 6 A cross-sectional view of the front side of the control assembly of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the adjusting wheel of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the push component of the present invention;

[0032] Fig. 9 It is a cross-sectional schematic diagram of the collection balloon of the present invention.

[0033] In the figure: 1. Balloon catheter; 2. Guide sheath; 3. Guide wire; 4. Balloon stent; 5. Pre-expansion balloon; 6. Collection balloon; 61. Shaping balloon; 62. Collection balloon; 63. Limitation ring; 7. Pushing assembly; 71. Thrombus pushing balloon; 72. Limitation ring pushing balloon; 8. Control assembly; 81. Control body; 811. Injection tube; 812. Injection cavity; 813. Piston; 814. Sealing through tube; 82. Linkage disk; 83. Intermittent main thread; 84. Positioning wheel; 85. Adjustment wheel; 851. Adjustment knob; 852. Intermittent secondary thread; 86. Linkage restriction assembly; 861. Linkage rotating clamp; 862. Linkage rod; 863. Limit slide rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 9 As shown, the present invention provides an iron-based vascular stent balloon dilatation catheter, comprising a balloon catheter 1, a guide sheath 2 is passed through the interior of the balloon catheter 1, a guide wire 3 is passed through the interior of the guide sheath 2, a balloon stent 4 is provided at one end of the balloon catheter 1 inserted into the blood vessel, a control component 8 is provided at one end of the balloon catheter 1 not inserted into the blood vessel, and the end of the guide sheath 2 not inserted into the blood vessel passes through the control component 8 of the balloon catheter 1 and is connected to another control component 8;

[0036] The balloon catheter 1 is also provided with a pre-expansion balloon 5 and a collection balloon 6. The collection balloon 6 is located outside the balloon support 4 on a side close to the heart, and the pre-expansion balloon 5 is located between the balloon support 4 and the collection balloon 6. The guide sheath 2 is provided with a pushing component 7.

[0037] The collecting balloon 6 includes a shaping balloon 61, a collecting balloon 62 and a limiting ring 63 connected to the balloon catheter 1, and the shaping balloon 61, the collecting balloon 62 and the limiting ring 63 are smoothly connected end to end;

[0038] The pushing assembly 7 includes a thrombus pushing balloon 71 and a limiting ring pushing balloon 72 arranged on the guiding sheath 2. The thrombus pushing balloon 71 and the limiting ring pushing balloon 72 are both located outside the balloon catheter 1. The thrombus pushing balloon 71 is located on the side of the guiding sheath 2 close to the heart, and the limiting ring pushing balloon 72 is located on the side of the guiding sheath 2 away from the heart. Due to the arrangement of the collecting balloon 6, the limiting ring 63, the collecting balloon 62 and the shaping balloon 61 can form a bowl shape that is open toward the thrombus under the cooperation of the limiting ring pushing balloon 72, and then the thrombus can be pushed into the bowl-shaped structure under the cooperation of the thrombus pushing balloon 71, so as to achieve the effect of wrapping the thrombus for discharge.

[0039] The balloon stent 4, the pre-expansion balloon 5 and the collection balloon 6 are introduced with air through the operating assembly 8 of the balloon catheter 1, and the thrombus pushing balloon 71 and the restriction ring pushing balloon 72 are introduced with air through the operating assembly 8 of the guide sheath 2, and the elastic flexibility of the balloon stent 4, the pre-expansion balloon 5 and the collection balloon 6 increases in sequence;

[0040] The control assembly 8 includes a control body 81 fixedly connected to the balloon catheter 1 and the guide sheath 2, a linkage disk 82 is arranged at one end of the control body 81, an intermittent main thread 83 is arranged on the outer surface of the control body 81, a positioning wheel 84 and an adjusting wheel 85 are movably sleeved on the outside of the control body 81, the positioning wheel 84 and the adjusting wheel 85 are connected to the control body 81 through the intermittent main thread 83, and a linkage limiting assembly 86 is connected between the adjusting wheel 85 and the linkage disk 82; due to the setting of the control assembly 8, the maximum movement range of the adjusting wheel 85 can be limited by the positioning wheel 84 with the cooperation of the intermittent main thread 83, that is, the maximum movement range of the linkage disk 82 and the piston 813 can be limited with the cooperation of the linkage limiting assembly 86, so that the maximum gas injection volume in the balloon catheter 1 and the guide sheath 2 can be well controlled, ensuring the balloon expansion effect while greatly avoiding the situation of excessive expansion and damage to the blood vessels;

[0041] The control body 81 includes an injection tube 811 fixedly connected to the outer ends of the balloon catheter 1 and the guide sheath 2, and an injection cavity 812 is opened inside the injection tube 811. The injection cavity 812 is respectively connected to the balloon catheter 1 and the guide sheath 2. The internal sealing sleeve of the injection cavity 812 is connected with a piston 813, and the piston 813 is transmission-connected to the linkage disk 82 through a linkage limiting component 86; due to the setting of the piston 813, with the cooperation of the linkage limiting component 86, the adjusting wheel 85 can drive 613 to move left and right along the inside of the injection cavity 812, so that the air inside the injection cavity 812 can be pushed into the balloon catheter 1 or the guide sheath 2, thereby achieving the effect of controlling the expansion of each balloon.

[0042] Preferably, the piston 813 is internally movably sleeved with a sealed through tube 814, both ends of which pass through the piston 813 and the injection cavity 812 and are fixedly sleeved on both ends of the injection tube 811, and the guide sheath 2 and the guide wire 3 are respectively movably arranged inside the corresponding sealed through tube 814.

[0043] Preferably, the adjusting wheel 85 includes an adjusting knob 851 movably sleeved on the outside of the injection tube 811, and an intermittent secondary thread 852 is arranged inside the adjusting knob 851. The intermittent secondary thread 852 is adapted to the intermittent main thread 83, and the length of the intermittent secondary thread 852 is smaller than the distance between adjacent intermittent main threads 83.

[0044] Preferably, the positioning wheel 84 is located at the end of the injection tube 811 outside the blood vessel, and the adjusting knob 851 is located at the end of the injection tube 811 outside the blood vessel. The interior of the positioning wheel 84 is provided with a complete continuous thread, and the continuous thread is adapted to the intermittent main thread 83. Due to the setting of the positioning wheel 84, the maximum movement range of the adjusting wheel 85 can be limited with the cooperation of the guide wire 3, so as to more accurately control the movement range of the adjusting wheel 85, that is, accurately control the movement range of the injection cavity 812, and thus achieve the effect of accurately controlling the expansion degree of each balloon, thereby ensuring that each balloon realizes its respective function while effectively avoiding unnecessary influence on the expansion of the gas balloon.

[0045] Preferably, the linkage limiting assembly 86 includes a linkage rotating snap ring 861 movably sleeved inside the linkage disk 82, the outer surface of the linkage rotating snap ring 861 close to the injection tube 811 extends to the outside of the linkage disk 82 and is fixedly connected with a plurality of evenly distributed linkage rods 862, the other end of the linkage rod 862 is fixedly connected to the adjusting knob 851, and the inside of the injection tube 811 is penetrated by a plurality of evenly distributed limit slides 863, one end of the limit slide 863 is fixedly connected to the piston 813, the other end of the limit slide 863 passes through the injection cavity 812 and extends to the outside of the injection tube 811 and is fixedly connected to the linkage disk 82; due to the setting of the linkage rotating snap ring 861, the linkage disk 82 and the limit slide 863 can drive the piston 813 to move left and right with the adjusting wheel 85 under the cooperation of the linkage rod 862, and at the same time, when the adjusting knob 851 is turned, the piston 813 will not be driven to rotate through the linkage limiting assembly 86, thereby slowing down the wear rate of the piston 813.

[0046] Preferably, the distances between the shaping capsule 61 , the collecting capsule 62 , the limiting ring 63 and the pre-dilation balloon 5 gradually increase.

[0047] Preferably, the length of the thrombus pushing balloon 71 is greater than the length of the limiting ring pushing balloon 72, the lengths of the balloon support 4 and the pre-expansion balloon 5 are matched, and the lengths of the balloon support 4 and the pre-expansion balloon 5 are greater than the lengths of the blood clots appearing in the blood vessels; due to the setting of the limiting ring pushing balloon 72, when the guide sheath 2 is pulled, the limiting ring 63 can be supported to drive the collecting balloon 62 to be embedded in the interior of the shaping balloon 61 as a whole so as to form a bowl shape open toward the thrombus, and the setting of the thrombus pushing balloon 71 can push the thrombus along the inner wall of the blood clot after it is expanded, thereby pushing the thrombus into the collecting balloon 6 for wrapping so as to be discharged later.

[0048] Preferably, the elastic flexibility of the thrombus pushing balloon 71 is higher than the elastic flexibility of the limiting ring pushing balloon 72, and the elastic flexibility of the shaping balloon 61 is greater than the elastic flexibility of the collecting balloon 62; the elastic flexibility of the pre-expansion balloon 5 is greater than the elastic flexibility of the balloon inside the balloon holder 4, and the balloon inside the balloon holder 4 begins to expand when the outer surface of the pre-expansion balloon 5 is larger than the initial inner diameter of the blood clot; and then, by designing the expansion rate of each balloon, each balloon can be expanded as sequentially as possible, so as to achieve their respective corresponding effects while avoiding affecting the functions of other balloons as much as possible.

[0049] The working principle and use process of the present invention:

[0050] After the puncture is completed, the guide wire 3, the guide sheath 2 and the balloon catheter 1 are inserted in sequence, and the collection balloon 6 and the pushing component 7 are first moved to the two ends of the coagulated thrombus in the blood vessel respectively;

[0051] Then, air is injected into the balloon catheter 1 and the guide sheath 2 in sequence. When air enters the balloon catheter 1, the collecting balloon 6 is first expanded. When the collecting balloon 6 is expanded, the outer surface of the collecting balloon 6 contacts the inner wall of the blood vessel. Under the restriction of the restriction ring 63, the expansion degree of the collecting balloon 62 is smaller than that of the shaping balloon 61, that is, the outer diameter of one end of the collecting balloon 62 close to the restriction ring 63 is smaller than the outer diameter of the other end or the shaping balloon 61.

[0052] When air enters into the guide sheath 2, the thrombus pushing balloon 71 and the limiting ring pushing balloon 72 are expanded in sequence until the outer surface of the pushing component 7 is adapted to the inner diameter of the blood clot in the blood vessel. At this time, the outer diameter of the limiting ring pushing balloon 72 is much smaller than the inner diameter of the blood clot but larger than the inner diameter of the limiting ring 63. Then, the guide sheath 2 is pulled to make the thrombus pushing balloon 71 and the limiting ring pushing balloon 72 at the front end slowly approach the thrombus and the limiting ring 63 in sequence. When the limiting ring pushing balloon 72 contacts the limiting ring 63, the limiting ring 63 is pushed by the guide sheath 2, so that the left end of the collecting balloon 62 moves to the right, so that the limiting ring 63 and the collecting balloon 62 are embedded in the interior of the shaping balloon 61, so that the collecting balloon 6 as a whole forms a bowl shape with an open left end. During this period, the movement of the thrombus pushing balloon 71 can push the thrombus along the inner wall of the blood clot to make it enter the bowl-shaped structure formed above. Then, the air in the balloon catheter 1 and the guide sheath 2 is released in sequence, so that the collecting balloon 6 can tightly wrap the thrombus.

[0053] Then continue to push the guide sheath 2 and the balloon catheter 1 until the pre-dilation balloon 5 moves to the blood clot. At this time, inject air into the guide sheath 2 and the balloon catheter 1 in turn to ensure that the collecting balloon 6 and the pushing component 7 completely wrap the thrombus. Continue to inject air into the balloon catheter 1 to expand the pre-dilation balloon 5 until its outer surface contacts the inner wall of the blood clot. Repeat the operation several times to expand the inner wall of the blood clot to a certain extent and further smooth it.

[0054] Finally, the balloon catheter 1 and the guide sheath 2 are pushed continuously to move the balloon stent 4 to the blood clot where the initial expansion is completed, and then air is injected into the balloon catheter 1 to expand the balloon inside the balloon stent 4 and to make the balloon stent 4 tightly supported on the inner wall of the blood clot;

[0055] The specific operation of the above-mentioned air injection is to adjust the maximum gas injection volume according to the patient's blood vessel diameter, and then rotate the positioning wheel 84 to make it move left and right along the outer surface of the injection tube 811, and then move the adjustment knob 851 left and right with the cooperation of the intermittent secondary thread 852 to drive the piston 813 to move left and right inside the injection cavity 812 through the linkage limiting component 86 and the linkage disk 82, so that the air inside the injection tube 811 can be pushed into the interior of the balloon catheter 1 and the guide sheath 2.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An iron-based vascular stent balloon dilatation catheter, comprising a balloon catheter (1), characterized in that: A guide sheath (2) is inserted into the interior of the balloon catheter (1), a guide wire (3) is inserted into the interior of the guide sheath (2), a balloon stent (4) is provided at the end of the balloon catheter (1) inserted into the blood vessel, a control component (8) is provided at the end of the balloon catheter (1) not inserted into the blood vessel, and the end of the guide sheath (2) not inserted into the blood vessel passes through the control component (8) of the balloon catheter (1) and is connected to another control component (8); The balloon catheter (1) is also provided with a pre-expansion balloon (5) and a collection balloon (6); the collection balloon (6) is located on the side of the balloon support (4) outside and close to the heart, and the pre-expansion balloon (5) is located between the balloon support (4) and the collection balloon (6); the guide sheath (2) is provided with a pushing component (7); The collecting balloon (6) comprises a shaping balloon (61), a collecting balloon (62) and a limiting ring (63) connected to the balloon catheter (1), wherein the shaping balloon (61), the collecting balloon (62) and the limiting ring (63) are smoothly connected end to end; The pushing assembly (7) comprises a thrombus pushing balloon (71) and a restriction ring pushing balloon (72) which are arranged on the guide sheath (2); the thrombus pushing balloon (71) and the restriction ring pushing balloon (72) are both located outside the balloon catheter (1); the thrombus pushing balloon (71) is located on a side of the guide sheath (2) close to the heart, and the restriction ring pushing balloon (72) is located on a side of the guide sheath (2) far from the heart; The balloon support (4), the pre-expansion balloon (5) and the collection balloon (6) are introduced with air through the control component (8) of the balloon catheter (1); the thrombus pushing balloon (71) and the restriction ring pushing balloon (72) are introduced with air through the control component (8) of the guide sheath (2); and the elastic flexibility of the balloon support (4), the pre-expansion balloon (5) and the collection balloon (6) increases in sequence; When the guide sheath (2) is pulled, the balloon (72) can be pushed through the restriction ring to abut against the restriction ring (63) so that the collection bag (62) is driven to be embedded in the interior of the shaping bag (61) as a whole to form a bowl shape that is open toward the thrombus; The control assembly (8) comprises a control body (81) fixedly connected to the balloon catheter (1) and the guide sheath (2); a linkage disk (82) is arranged at one end of the control body (81); an intermittent main thread (83) is arranged on the outer surface of the control body (81); a positioning wheel (84) and an adjusting wheel (85) are movably sleeved on the outside of the control body (81); the positioning wheel (84) and the adjusting wheel (85) are connected to the control body (81) via the intermittent main thread (83); a linkage limiting assembly (86) is connected between the adjusting wheel (85) and the linkage disk (82); The control body (81) includes an injection tube (811) fixedly connected to the outer ends of the balloon catheter (1) and the guide sheath (2); an injection cavity (812) is provided inside the injection tube (811); the injection cavity (812) is respectively connected to the balloon catheter (1) and the guide sheath (2); a piston (813) is sealed inside the injection cavity (812); and the piston (813) is transmission-connected to the linkage disk (82) via a linkage limiting component (86).

2. The iron-based vascular stent balloon dilatation catheter according to claim 1, characterized in that: The piston (813) is internally movably sleeved with a sealed through tube (814), the two ends of which pass through the piston (813) and the injection chamber (812) and are fixedly sleeved on the two ends of the injection tube (811), and the guide sheath (2) and the guide wire (3) are respectively movably arranged inside the corresponding sealed through tube (814).

3. The iron-based vascular stent balloon dilatation catheter according to claim 1, characterized in that: The adjusting wheel (85) includes an adjusting knob (851) movably sleeved on the outside of the injection tube (811), and an intermittent secondary thread (852) is arranged inside the adjusting knob (851). The intermittent secondary thread (852) is adapted to the intermittent main thread (83), and the length of the intermittent secondary thread (852) is smaller than the distance between adjacent intermittent main threads (83).

4. The iron-based vascular stent balloon dilatation catheter according to claim 3, characterized in that: The positioning wheel (84) is located at an end of the injection tube (811) outside the injection tube close to the blood vessel, and the adjustment knob (851) is located at an end of the injection tube (811) outside the injection tube away from the blood vessel. The interior of the positioning wheel (84) is provided with a complete continuous thread, and the continuous thread is adapted to the intermittent main thread (83).

5. The iron-based vascular stent balloon dilatation catheter according to claim 4, characterized in that: The linkage limiting component (86) includes a linkage rotating clamp (861) movably sleeved inside the linkage disk (82); the outer surface of the linkage rotating clamp (861) extends to the outside of the linkage disk (82) on one side close to the injection tube (811) and is fixedly connected to a plurality of linkage rods (862) that are evenly distributed; the other end of the linkage rod (862) is fixedly connected to the adjusting knob (851); the inside of the injection tube (811) is penetrated by a plurality of limit slides (863) that are evenly distributed; one end of the limit slide (863) is fixedly connected to the piston (813); the other end of the limit slide (863) passes through the injection cavity (812) and extends to the outside of the injection tube (811) and is fixedly connected to the linkage disk (82).

6. The iron-based vascular stent balloon dilatation catheter according to claim 1, characterized in that: The distances between the shaping capsule (61), the collecting capsule (62), the limiting ring (63) and the pre-dilation balloon (5) gradually increase.

7. The iron-based vascular stent balloon dilatation catheter according to claim 1, characterized in that: The length of the thrombus pushing balloon (71) is greater than the length of the limiting ring pushing balloon (72), the lengths of the balloon support (4) and the pre-expansion balloon (5) are matched, and the lengths of the balloon support (4) and the pre-expansion balloon (5) are greater than the length of the blood clot present in the blood vessel.

8. The iron-based vascular stent balloon dilatation catheter according to claim 1, characterized in that: The elastic flexibility of the thrombus pushing balloon (71) is higher than the elastic flexibility of the limiting ring pushing balloon (72), and the elastic flexibility of the shaping balloon (61) is higher than the elastic flexibility of the collecting balloon (62); the elastic flexibility of the pre-expansion balloon (5) is higher than the elastic flexibility of the balloon inside the balloon holder (4), wherein the balloon inside the balloon holder (4) begins to expand when the outer surface of the pre-expansion balloon (5) is larger than the initial inner diameter of the blood clot.

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