CN112971925B

CN112971925B - Catheter suitable for dissolving and crushing thrombus in iliofemoral deep vein

Info

Publication number: CN112971925B
Application number: CN202110212609.5A
Authority: CN
Inventors: 祝恒
Original assignee: Henan Kunlun Precision Medical Technology Co ltd
Current assignee: Henan Kunlun Precision Medical Technology Co ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2022-09-16
Anticipated expiration: 2041-02-23
Also published as: CN112971925A

Abstract

The invention provides a catheter suitable for dissolving and fragmenting thrombus of deep iliac femoral vein, which comprises a hard catheter, a driving component and a fragmenting thrombus component, wherein the catheter is Y-shaped, a straight catheter and a branch catheter are formed in the catheter through a partition wall, a row of side openings are formed in the wall of the straight catheter, the fragmenting thrombus component is contained in the side openings in an initial state, and in the thrombus treatment process, the driving component is used for driving the fragmenting thrombus component to extend out from the side openings and fragmenting thrombus sacculus through the fragmenting thrombus component. The invention can achieve the purpose of simultaneously crushing thrombus sacculus and dissolving thrombus by contacting the catheter in the process of treating thrombus. The cutting piece/piece can play the effect of cutting thrombus at the garrulous of thrombus embolus in-process, rotates repeatedly through the guide arm, and cutting piece/piece business turn over side opening can reach the purpose of garrulous thrombus, in addition, injects urokinase through the thrombolysis pipe pressurization at the in-process of garrulous thrombus, can increase the dissolving effect of broken thrombus.

Description

Catheter suitable for dissolving and crushing thrombus of deep iliac femoral vein

Technical Field

The invention relates to the technical field of medical instruments, in particular to a catheter suitable for dissolving and crushing thrombus of deep iliac veins.

Background

The deep popliteal-iliac femoral vein thrombosis is a disease caused by thrombus formed by blood coagulation in the deep vein, and has the main clinical symptoms of lower limb swelling and pain, serious complications of limb necrosis and pulmonary embolism, and threat to the health and life of patients. In addition, deep venous thrombosis of the popliteal-iliac femoris, which is not treated in time, causes chronic deep venous insufficiency, causes repeated swelling of the lower limbs, and seriously affects work and life. In the prior art, the main treatments are divided into medical thrombolysis, surgical operation thrombus removal and interventional treatment. The medical drug thrombolysis has a great risk of bleeding, especially the risk of fatal cerebral hemorrhage of elderly patients can occur, and in addition, the risk of pulmonary embolism caused by thrombus falling off is difficult to avoid in the thrombolysis process, so that the application range of the medical drug thrombolysis is limited. The surgical operation needs to cut the vein, the operation wound is large, in addition, the operation damages to the vein intima, the recurrence rate of the thrombus after the operation is high, and the compliance of the patient is poor. The interventional therapy has the advantages of minimal invasion, strong repeatability, high efficiency and the like, and is widely applied in clinic at present.

For example, chinese patent No. CN103212148B discloses a beaded eccentric balloon thrombolysis catheter for iliac-femoral deep vein thrombosis (hereinafter referred to as "the scheme"), the tail end of the catheter is composed of two ports, one of which is a balloon catheter port, and the other is a common inlet of a guide wire and a thrombolysis catheter, called as a Y-valve port, and is used by connecting a Y-valve. The catheter end is formed by fusing two catheters with mutually independent functions and is a double-lumen catheter. One of the cavities is used as a balloon catheter passage, and the other cavity is used as a guide wire and a thrombolytic catheter passage. The catheter working part consists of a beaded eccentric balloon and a corresponding slit thrombolysis catheter on the other side. The tube cavity is made by a tube extruding machine and a PTFE hydrophilic coating, each part of the saccule or the thrombolysis (with the length of 10-20 cm) can work respectively or simultaneously, the saccule (with the diameter of 5-20 mm) extrudes the thrombolysis, the slit catheter at the other side can be injected with thrombolysis medicine thrombolysis simultaneously, and the thrombolysis effect can be enhanced in the rotating direction.

However, the scheme still has the following defects: firstly because adopt the force pump to aerify inflation and inhale flat to the eccentric sacculus of string of beads form, this process involves and needs to switch the gas circuit state, the gas circuit conversion will consume certain time, this will influence operation rate, secondly because the sacculus pipe of the terminal closed of tube head and two-chamber pipe, seal between the common pipe, this will lead to can only become slit form department by thrombolysis pipe end pipe when adding medicine through Y valve interface and ooze, lead to the terminal unable very first time contact thrombolysis medicine in sacculus pipe department of tube head of two-chamber pipe, so the treatment remains to be strengthened.

Disclosure of Invention

The invention aims to provide a catheter suitable for dissolving and crushing thrombus of deep iliac femoral vein, which solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a pipe suitable for garrulous stopper is dissolved to deep vein thrombus of iliofemoral part of the thigh, includes pipe, drive assembly and the garrulous subassembly of tieing of stereoplasm, the pipe is Y shape, forms straight pipe and a pipe through a division wall in it, a row of side opening has been seted up on the pipe wall of straight pipe, and during initial state, this garrulous subassembly of tieing is accomodate in the side opening, at the treatment in-process of thrombus, drive assembly is used for driving this garrulous subassembly of tieing to stretch out by the side opening, ties to the garrulous stopper of thrombus sacculus through the garrulous subassembly of tieing.

Preferably, the drive assembly includes the guide arm, the bits of broken bolt subassembly is including having elastic tabs, in the guide arm cartridge arrived the pipe, leave the breach behind its head detached partly, the part that the head left is the branch body of rod, the top of tab is fixed with the straight pipe inner wall of side opening part, and the bottom is intraductal slope, and installs the cutting piece, and during initial condition, the top of this cutting piece is accomodate and is being opened mouthful to the side, in the treatment process of thrombus, the guide arm drive branch body rotates, will the bottom of tab is pushed to the side opening to with the cutting piece top outside the side opening to the thrombus sacculus bits of broken bolt.

Preferably, in an initial state, the outer side surface of the support rod body is in adaptive contact with the partition wall, the inner side surface of the support rod body is opposite to and does not contact with the bottom of the folded piece, and the folded piece and the cutting piece are in a V shape or a U shape.

Preferably, the transition between the outer side face and the inner side face of the support rod body is a fillet face, the folding piece and the side face of the cutting piece are arc-shaped faces, teeth are arranged at the top of the cutting piece, and in an initial state, the teeth at the top of the cutting piece are flush with the side opening.

Preferably, drive assembly includes the guide arm, garrulous subassembly of tie includes the cutting piece, in the guide arm cartridge arrived the pipe, circle branch is installed to its head, the cutting piece is located to the side opening in, and with straight pipe inner wall between have the elastic component, during initial state, the top of this cutting piece is accomodate in the side opening, at the treatment in-process of thrombus, guide arm drive circle branch rotates, will the cutting piece top is to the broken bolt of thrombus sacculus outside the side opening.

Preferably, during initial state, circle branch is off-centre setting, its surface and cutting block and with the partition wall contactless, the side of cutting block is the arcwall face.

Preferably, the guide tube further comprises an elastic end cap which is sleeved on the tail part of the straight guide tube and is connected with the tail part of the guide rod.

Preferably, the inner wall of the end cover head is provided with an annular bulge, and the outer wall of the straight conduit is provided with an annular groove which is matched with the annular bulge to rotate.

Preferably, a switching block is installed in the center of the head of the end cover, a switching groove which is matched and inserted with the switching block is formed in the tail of the guide rod, a rotating handle and a pressing rod are arranged at the tail of the end cover, the rotating handle is located in the center, and the pressing rod is symmetrically arranged relative to the rotating handle.

Preferably, an indication line arranged in parallel with the axial lead direction is arranged on the outer wall at the tail part of the straight guide pipe, an indication arrow used for being matched with the indication line for indication is arranged on the side wall of the end cover, and a plurality of through holes are formed in the partition wall.

Compared with the prior art, the invention has the beneficial effects that:

the catheter can achieve the purpose of crushing thrombus sacculus and dissolving thrombus by contacting the catheter simultaneously in the thrombus treatment process. The cutting piece/piece can play the effect of cutting the thrombus at the garrulous effect of tying the in-process of thrombus, rotates repeatedly through the guide arm, and cutting piece/piece business turn over side opening can reach the purpose of garrulous bolt. In addition, during the process of thrombus breaking, urokinase is injected by pressurizing the thrombolytic catheter, and is brought to the thrombus breaking position along with the movement of the cutting blade/block through the through hole, so that the dissolving effect of broken thrombus can be increased, and the purpose of treating thrombus is achieved. The guide rod is adopted to rotate to directly drive the cutting blade/block inlet and outlet side openings to achieve the purpose of breaking the embolus, so that the operation time can be shortened, the guide rod can be driven to rotate by hands without mechanical equipment, and the cost of using various instruments is reduced.

Through setting up the through-hole, can realize straight pipe and a pipe intercommunication, be convenient for on the one hand when injecting the thrombolysis medicine through a pipe, along with drive assembly drive garrulous bolt subassembly business turn over side opening, this medicine can reach the intervention treatment position simultaneously, makes medicine direct action in the tissue position after garrulous bolt subassembly is tied to the broken thrombus sacculus through garrulous, and medicine infiltration area is bigger moreover, and treatment is better, and on the other hand is straight pipe and a pipe head do not seal, compare in the terminal end closure of prior art pipe head, and the thrombolysis medicine injection volume can not be influenced, can inject more doses in the same time. And simultaneously, the load of the medicine injection equipment can be reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the handle of FIG. 1 shown rotated 180 degrees in the direction of arrow A;

FIG. 3 is a schematic structural view of a support rod and a bolt assembly according to embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of a detailed combination of a support rod body and a bolt assembly according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of the end cap, guide rod and straight conduit configuration of the present invention;

FIG. 6 is a schematic view of the overall structure of embodiment 2 of the present invention;

FIG. 7 is a schematic view of the stem of FIG. 6 shown rotated 180 degrees in the direction of arrow A;

fig. 8 is a schematic diagram of a detailed combination of the fulcrum body and the bolt assembly in embodiment 2 of the invention.

In the figure: the catheter comprises a catheter body 1, a partition wall 2, a straight catheter 3, a catheter 4, a guide wire 5, a guide rod 6, a guide rod 7, a support rod body, a side opening 8, a folding piece 9, a cutting piece 10, an end cover 11, a rotating handle 12, a pressing rod 13, an indicating line 14, an indicating arrow 15, a through hole 16, a cutting block 17, an elastic piece 18, a circular support rod 19, a notch 20, a circular corner face 21, an arc face 22, an annular bulge 23, an annular groove 24, a switching block 25, a switching groove 26 and teeth 27.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 5, the present invention provides a technical solution:

the utility model provides a pipe suitable for garrulous bolt of deep vein thrombolysis of iliofemoral part, includes pipe 1, drive assembly and the garrulous subassembly of tieing of stereoplasm, pipe 1 is Y shape, forms straight pipe 3 and branch pipe 4 through a division wall 2 in it, a row of side opening 8 has been seted up on the pipe wall of straight pipe 3, and side opening 8 quantity sets for according to the condition, and during initial condition, this garrulous subassembly of tieing is accomodate in side opening 8, and in the treatment process of thrombus, drive assembly is used for driving this garrulous subassembly of tieing and stretches out by side opening 8, and the garrulous bolt of sacculus of tieing through garrulous subassembly of tieing, in the invention, head/head end are based on that external operation end carries out the definition for afterbody/tail end.

Specifically, the driving assembly comprises a guide rod 6, the thrombus smashing assembly comprises a folding piece 9 with elasticity, the guide rod 6 is inserted into the catheter 1, a gap 20 is reserved after a part of the head of the guide rod is removed, the part reserved at the head is a supporting rod body 7, the top of the folding piece 9 is fixed with the inner wall of the straight catheter 3 at the position of the side opening 8, the bottom of the folding piece 9 inclines towards the inside of the catheter, a cutting piece 10 is installed, the top of the cutting piece 10 is contained in the side opening 8 in the initial state, in the thrombus treatment process, the guide rod 6 drives the supporting rod body 7 to rotate, the bottom of the folding piece 9 is pushed towards the side opening 8, and therefore the cutting piece 10 is pushed to the outside of the side opening 8 to smash the thrombus balloon. In an initial state, the outer side surface of the support rod body 7 is in adaptive contact with the partition wall 2, the inner side surface of the support rod body 7 is opposite to the bottom of the folded piece 9 and is not in contact with the bottom of the folded piece 9, and the folded piece 9 and the cutting piece 10 are in a V shape or a U shape. Specifically, the transition between the outer side surface and the inner side surface of the support rod body 7 is a round corner surface 21, the side surfaces of the folding piece 9 and the cutting piece 10 are arc-shaped surfaces 22, teeth 27 are arranged at the top of the cutting piece 10, and in an initial state, the teeth 27 at the top of the cutting piece 10 are flush with the side opening 8.

As shown in fig. 1 and 3, the tail part of the guide rod 6 is inserted into the catheter 1 in a matched manner and can rotate in the catheter 1, a part of the guide rod 6 is dug out, then a notch 20 is left, and the rest part is the support rod body 7, so that the guide rod 6 can rotate, and meanwhile, the part of the guide rod 6, namely the support rod body 7 can push the folded piece 9 and the cutting piece 10 out of the side opening 8, so that thrombus can be treated, and the cutting piece 10 can (repeatedly) cut and shred thrombus on the thrombus balloon. After the rotation handle 12 is rotated 180 degrees in the direction of arrow a (or in the opposite direction), the outer curved surface of the post body 7 pushes the flap 9 out of the side opening 8, as shown in fig. 1, so as to completely eject the cutting blade 10 out of the side opening 8, i.e., the state shown in fig. 2. In order to facilitate the smooth entering and exiting of the cutting blade 10, the opening radius of the side opening 8 is not smaller than the radius of the folding piece 9 driving the cutting blade 10 to rotate, and in the initial state, the inner side surface of the support rod body 7 is opposite to the bottom of the folding piece 9 and is not in contact with the bottom of the folding piece 9, and after the rotating handle 12 rotates 180 degrees, the cutting blade 10 can be conveniently and completely pushed out. In order to better perform thrombus breaking on the thrombus saccule so as to realize better treatment effect, the folding piece 9 obliquely extends into the catheter 3, the bottom of the folding piece 9 is a movable end relative to the top, a cutting piece 10 is installed, and the movable end penetrates through the central axis of the catheter 3, is close to the inner side surface of the strut body 7 as much as possible and is not contacted with the central axis.

As shown in fig. 3 to 4, the transition between the outer side surface and the inner side surface of the strut body 7 is set to be the round corner surface 21, and the side surfaces of the folding piece 9 and the cutting piece 10 are the arc surfaces 22, so that the strut body 7 gradually jacks up the folding piece 9 and the cutting piece 10 in the process of gradually rotating 180 degrees from the initial position, and the cutting piece 10 is pushed out of the side opening 8, so that the thrombus balloon is crushed, and a better treatment effect is realized. Set up tooth 27 at cutting blade 10 top, be better realization can carry out the broken bolt to the thrombus sacculus when cutting blade 10 stretches out for treatment efficiency shortens operation time.

Specifically, the guide tube further comprises an end cover 11, and the end cover 11 is sleeved on the tail part of the straight guide tube 3 and is connected with the tail part of the guide rod 6. The inner wall of the head part of the end cover 11 is provided with an annular bulge 23, and the outer wall of the straight conduit 3 is provided with an annular groove 24 which is matched with the annular bulge 23 to rotate. The center in the head of the end cover 11 is provided with a switching block 25, the tail of the guide rod 6 is provided with a switching groove 26 which is inserted with the switching block 25 in a matching way, the tail of the end cover 11 is provided with a rotating handle 12 and a pressing rod 13, the rotating handle 12 is positioned at the center, and the pressing rod 13 is symmetrically arranged relative to the rotating handle 12.

As shown in fig. 5, by arranging the end cover 11, on one hand, the guide rod 6 can rotate in the straight guide tube 3, so that the cutting blade 10 is driven to (repeatedly) enter and exit the side opening 8, and the thrombus balloon is subjected to thrombus breaking, and on the other hand, the annular protrusion 23 is matched with the annular groove 24, so that the end cover 11 can be ensured not to be taken off when rotating, and the purpose of preventing permeation is achieved. The adapter block 25 is provided to be inserted into the adapter groove 26, so that the guide rod 6 can rotate synchronously when the end cap 11 is rotated by the rotation handle 12 with the anti-slip pattern, in this embodiment, the adapter block 25 may be a prism with a triangular or quadrangular shape. The end cap 11 has certain elasticity, such as made of medical silica gel or rubber, and by arranging the two symmetrical pressing rods 13, when the end cap 11 is removed, the opening of the end cap 11 is enlarged by pressing the two pressing rods 13 inwards, so that the annular protrusion 23 can be conveniently separated from the annular groove 24 and can be conveniently removed. And the opening of the end cover 11 is restored to the original state without influencing the use by loosening the pressing rod 13. Of course, in order to better remove the end cap 11, the number of the pressing rods 13 is preferably 4, and the pressing rods are uniformly distributed in the circumferential direction of the rotating handle 12, so that the opening of the end cap 11 is enlarged more uniformly during pressing. This makes the disengagement from the annular projection 23 from the annular groove 24 quicker. In this embodiment, only 2 pipes may be installed to simplify the structure of the pipe.

Specifically, an indicating line 14 arranged in parallel with the axial lead direction is arranged on the outer wall of the tail part of the straight conduit 3, an indicating arrow 15 used for being matched with the indicating line 14 for indicating is arranged on the side wall of the end cover 11, a plurality of through holes 16 are arranged on the partition wall 2, and the number is set according to the situation. As shown in fig. 1 and 2, the indication arrow 15 and the indication line 14 are arranged to work together, so that the state of the guide rod 6 can be known conveniently, and the support rod body 7 can be inserted into the straight conduit 3 smoothly without affecting the cutting blade 10. Through setting up through-hole 16, can realize straight pipe 3 and branch pipe 4 intercommunication, be convenient for on the one hand when injecting the thrombolysis medicine through branch pipe 4, rotate drive cutting piece 10 business turn over side opening 8 along with the body of branch pipe 7, this medicine can arrive simultaneously and intervene the treatment position, makes medicine direct action to organize the position through garrulous subassembly to the garrulous back of thrombus sacculus, and medicine infiltration area is bigger moreover, and the treatment is better, and on the other hand is straight pipe 3 does not seal with branch pipe 4 head, compares in the terminal seal of prior art pipe head, and the thrombolysis medicine injection volume can not be influenced, can inject into more doses in the same time. And simultaneously, the load of the medicine injection equipment can be reduced.

The catheter can achieve the purpose of crushing thrombus sacculus and dissolving thrombus by contacting the catheter simultaneously in the thrombus treatment process. The cutting blade 10 can play the effect of cutting thrombus at the garrulous effect of emboliaing the in-process of thrombus, rotates the body of rod 7 through guide arm 6 repeatedly, and the purpose that the cutting blade 10 business turn over exit side opening 8 can reach garrulous bolt. In addition, during the process of thrombus breaking, urokinase is injected by pressurizing the thrombolytic catheter, and is brought to the thrombus breaking position along with the movement of the cutting blade 10 through the through hole 16, so that the dissolving effect of broken thrombus can be increased, and the purpose of treating thrombus is achieved. The purpose of crushing the embolus is achieved by directly driving the cutting blade 10 to enter and exit the side opening 8 by rotating the support rod body 7, so that the operation time can be shortened, the support rod body 7 can be driven to rotate by hands without mechanical equipment, and the cost of using various instruments is reduced.

The catheter using method comprises the following steps:

(1) a guide wire 5 is placed into the tail opening of the branch catheter 4, the guide wire 5 passes through the thrombus section, and then is placed into the branch catheter 4 through the guide wire 5 and is placed into the thrombus section;

(2) after confirming that the side opening 8 is positioned in the thrombus by radiography, the guide rod 6 repeatedly rotates the support rod body 7, and the cutting blade 10 enters the side opening 8 to break the thrombus;

(3) under the condition that the guide wire 5 is reserved, thrombolytic drugs are injected through the opening at the tail part of the branch catheter 4 to achieve the purpose of thrombolysis, meanwhile, the guide rod 6 can be used for driving the branch catheter body 7 to rotate continuously, so that the cutting blade 10 can continue to break the thrombus, thrombolytic drugs can be injected on the basis of breaking the thrombus by the cutting blade 10, and the thrombus is conveniently dissolved through the through hole 16 and the side opening 8;

(4) continuously adjusting the position of the straight catheter 3 to ensure that thrombi in different directions are cracked and dissolved;

(5) after the use is finished, the catheter is pushed out to complete the related treatment.

In the step (1), the branch catheter 4 can be injected with anticoagulant drugs in a pulse mode to promote thrombolysis.

Example 2

Basically the same as example 1, with a slight difference:

drive assembly includes guide arm 6, the garrulous subassembly of tieing includes cutting block 17, in guide arm 6 cartridge to pipe 1, circle branch 19 is installed to its head, cutting block 17 is located to side opening 8 in, and with straight pipe 3 inner wall between have elastic component 18, during initial state, this cutting block 17's top is accomodate in side opening 8, at the treatment in-process of thrombus, 6 drive circle branches 19 of guide arm rotate, will cutting block 17 tops is tied to the garrulous of thrombus sacculus outside side opening 8. In the initial state, the circular support rod (19) is eccentrically arranged, the surface of the circular support rod is not in contact with the cutting block 17 and the partition wall 2, the side surface of the cutting block 17 is an arc-shaped surface 22, and the top of the cutting block 17 is also provided with teeth 27 (not shown in the figure).

As shown in fig. 6 to 8, in the present embodiment, the driving assembly includes a guide bar 6. The head of the cutting pipe is provided with a round supporting rod 19, the bolt breaking assembly comprises a cutting block 17, the cutting block is arranged on the inner wall of the straight pipe 3 and is reset through an elastic piece 18, the elastic piece 18 adopts a spring, the spring can be sleeved with the cutting block 17, and the top of the spring is arranged on the inner wall of the straight pipe 3. In-process at round support rod 19 by initial position rotation 180 gradually, the round support rod 19 of being convenient for will cut piece 17 jack-up gradually to the realization is ejecting out cutting piece 17 outside side opening 8, thereby realizes breaking the bolt to the thrombus sacculus, and realizes better treatment.

The catheter using method comprises the following steps:

(2) after confirming that the side opening 8 is positioned in the thrombus by radiography, the round supporting rod 19 is repeatedly rotated by the guide rod 6, and the cutting block 17 enters and exits the side opening 8 to achieve the purpose of crushing the thrombus;

(3) under the condition that the guide wire 5 is reserved, thrombolytic drugs are injected through the opening at the tail part of the branch catheter 4 to achieve the purpose of thrombolysis, meanwhile, the guide rod 6 can be used for driving the round support rod 19 to rotate continuously, so that the cutting block 17 can continue to break the thrombus, thrombolytic drugs can be injected on the basis of the broken thrombus of the cutting block 17, and the thrombus is conveniently dissolved through the through hole 16 and the side opening 8;

The remaining parts of the invention, which are not described, are the same as, or known or can be implemented using the prior art, and are not described in detail herein.

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 alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A catheter suitable for dissolving and crushing thrombus of deep iliac femoral vein is characterized in that: the thrombus-breaking catheter comprises a hard catheter (1), a driving assembly and a thrombus-breaking assembly, wherein the catheter (1) is Y-shaped, a straight catheter (3) and a branch catheter (4) are formed in the catheter through a partition wall (2), a row of side openings (8) are formed in the catheter wall of the straight catheter (3), the thrombus-breaking assembly is contained in the side openings (8) in an initial state, the driving assembly is used for driving the thrombus-breaking assembly to extend out of the side openings (8) in the thrombus treatment process, thrombus sacculus thrombus is broken through the thrombus-breaking assembly, the driving assembly comprises a guide rod (6), the thrombus-breaking assembly comprises an elastic folding piece (9), the guide rod (6) is inserted into the catheter (1), a gap (20) is left after part of the head of the guide rod is removed, the part left by the head is a branch catheter body (7), and the top of the folding piece (9) is fixed with the inner wall of the straight catheter (3) at the side openings (8), the bottom inclines towards the interior of the tube, the cutting blade (10) is installed, the top of the cutting blade (10) is contained in the side opening (8) in the initial state, the guide rod (6) drives the support rod body (7) to rotate in the treatment process of thrombus, the bottom of the folding piece (9) is pushed to the side opening (8), so that the cutting blade (10) is pushed to the outside of the side opening (8) to break the thrombus sacculus, or the breaking bolt assembly comprises a cutting block (17), the guide rod (6) is inserted into the catheter (1), the head of the guide rod is provided with a round support rod (19), the cutting block (17) is positioned in the side opening (8), an elastic piece (18) is arranged between the cutting block and the inner wall of the straight catheter (3), the top of the cutting block (17) is contained in the side opening (8) in the initial state, and the guide rod (6) drives the round support rod (19) to rotate in the treatment process of thrombus, and (3) ejecting the cutting block (17) to the outside of the side opening (8) to carry out thrombus breaking on the thrombus saccule.

2. The catheter for thrombolytic thrombus of the deep iliac-femoral vein of claim 1, wherein: in an initial state, the outer side face of the support rod body (7) is in adaptive contact with the partition wall (2), the inner side face of the support rod body (7) is opposite to the bottom of the folding piece (9) and is not in contact with the bottom of the folding piece, and the folding piece (9) and the cutting piece (10) are in a V shape or a U shape.

3. The catheter suitable for the deep iliac-femoral vein thrombolytic suppository, according to claim 2, wherein: transition between the lateral surface and the medial surface of the strut body (7) is fillet face (21), the side of folded piece (9) and cutting blade (10) is arcwall face (22), the top of cutting blade (10) has tooth (27), and during initial state, tooth (27) and side opening (8) at cutting blade (10) top flush mutually.

4. The catheter suitable for the deep iliac femoral vein thrombolytic suppository, according to claim 1, wherein: in the initial state, the round supporting rod (19) is eccentrically arranged, the surface of the round supporting rod is not in contact with the cutting block (17) and the partition wall (2), and the side surface of the cutting block (17) is an arc-shaped surface (22).

5. The catheter for the thrombolytic of the deep iliac-femoral vein according to any one of claims 1 to 4, wherein: the guide tube also comprises an elastic end cover (11), and the end cover (11) is sleeved on the tail part of the straight guide tube (3) and is connected with the tail part of the guide rod (6).

6. The catheter suitable for the deep iliac femoral vein thrombolytic suppository, according to claim 5, wherein: the inner wall of the head part of the end cover (11) is provided with an annular bulge (23), and the outer wall of the straight conduit (3) is provided with an annular groove (24) which is matched and rotated with the annular bulge (23).

7. The catheter suitable for the deep iliac femoral vein thrombolytic suppository, according to claim 5, wherein: the improved structure is characterized in that a transfer block (25) is installed in the center of the head of the end cover (11), a transfer groove (26) which is matched and inserted with the transfer block (25) is formed in the tail of the guide rod (6), a rotating handle (12) and a pressing rod (13) are arranged at the tail of the end cover (11), the rotating handle (12) is located in the center, and the pressing rod (13) is symmetrically arranged relative to the rotating handle (12).

8. The catheter suitable for the deep iliac femoral vein thrombolytic suppository, according to claim 5, wherein: the outer wall of the tail part of the straight guide pipe (3) is provided with an indicating line (14) which is parallel to the axial lead direction, the side wall of the end cover (11) is provided with an indicating arrow (15) which is used for being matched with the indicating line (14) for indicating, and the partition wall (2) is provided with a plurality of through holes (16).