CN113633445A - Thrombus-taking bracket catheter - Google Patents

Abstract

The invention provides a thrombus extraction stent catheter, which comprises: a handle; the catheter body is connected with the handle at one end; the outer diameter of the support net disc is adjustable, the support net disc is arranged at the other end of the catheter body, and the number of support disc bodies arranged in the support net disc is larger than or equal to 2. The beneficial effects of its technical scheme lie in, get the thrombus support and comprise a plurality of support net dishes, and every support net dish all can adjust the external diameter, makes it can adapt to different vascular sizes, also reduces the damage to the blood vessel simultaneously.

Description

Thrombus-taking bracket catheter

Technical Field

The invention relates to the technical field of medical equipment, in particular to a thrombus removal support catheter.

Background

Thrombosis, i.e., the local coagulation of blood, can occur in arterial or venous circulation, and is the common pathological basis for ischemic heart disease, cerebral arterial thrombosis, and venous thromboembolism. Ischemic heart disease and stroke account for one-fourth of all deaths worldwide and have become the leading causes of human death. Deep vein thrombosis and pulmonary embolism are collectively called VTE, and are the death cause of 3 rd cardiovascular related diseases after myocardial infarction and stroke.

Platelet activation and aggregation, as well as thrombin-mediated fibrin deposition, lead to thrombosis. All thrombi are composed of aggregated platelets, fibrin and bound red blood cells, but their respective proportions differ in arteriovenous thrombi. Arterial thrombi are formed under high shear forces and contain high numbers of platelets, low amounts of fibrin, and relatively few red blood cells. In contrast, venous thrombosis is formed in a low shear environment, is relatively rich in fibrin and red blood cells, but has a lower platelet count than arterial thrombosis. Thus, platelets dominate arterial thrombosis, while fibrin is the major component of venous thrombosis. Understanding the differences in the composition of arterial and venous thrombi helps guide treatment.

The prevention and treatment of thrombotic diseases aims at improving hypercoagulable state, recanalizing or reconstructing blood flow path, and preventing and treating tissue ischemia and necrosis. When the anti-thrombosis treatment strategy is formulated, attention is paid to whether the affected part is a vein or an artery circulatory system; the degree and location of vascular involvement; the spread of vascularization, risk of embolism or recurrence; and the relative advantages and disadvantages of antithrombotic therapy and hemorrhage. The treatment of arterial thrombosis focuses on anti-platelet treatment, and the application of anti-platelet drugs such as aspirin and the like can reduce the occurrence of arterial thrombosis and the surgical intervention; venous thrombosis is mainly caused by blood stasis and hypercoagulability, and therefore, activities should be increased and anticoagulants should be used.

When the existing thrombus taking stent catheter in the market is clinically used, the proper stent specification needs to be selected by combining the blood vessel size of a patient so as to remove thrombus in the blood vessel and increase the operation difficulty of an operation.

Disclosure of Invention

In view of the above problems with prior art thrombectomy stents, there is now provided a method for providing a plurality of stent mesh discs with adjustable outer diameter to fit different vessel sizes.

The specific technical scheme is as follows:

an embolectomy stent catheter, comprising:

a handle;

the catheter body is connected with the handle at one end;

the outer diameter of the support net disc is adjustable, the support net disc is arranged at the other end of the catheter body, and the number of support disc bodies arranged in the support net disc is larger than or equal to 2.

Preferably, the rack tray comprises: the three support disc bodies are respectively a first support disc body, a second support disc body and a third support disc body, wherein a preset distance is reserved between every two adjacent support disc bodies.

Preferably, the catheter body comprises:

the end of the conduit;

one end of the first conduit, which is back to the handle, is a conical opening;

the second guide pipe is sleeved on the first guide pipe;

the third guide pipe is sleeved on the second guide pipe;

the first guide pipe, the second guide pipe and the third guide pipe can relatively stretch and slide;

one end of the support net disc is connected with the end part of the conduit, the other end of the support net disc is connected with the conduit III, the conduit I is connected with the joint between the support disc body I and the support disc body II, and the conduit II is connected with the joint between the support disc body II and the support disc body III; the stent mesh disc and the catheter connecting part are provided with radiopaque marker rings.

Preferably, the stent mesh disc is composed of a plurality of metal wires in a predetermined shape.

Preferably, each tray body of the bracket is of a tray-shaped structure which is wide in the middle and contracted at two ends and is formed by a plurality of metal wires.

Preferably, the support mesh disc is integrally formed.

Preferably, the handle is provided with groove bodies corresponding to the first conduit and the second conduit and the third conduit respectively, a poking block connected with the first conduit or the second conduit or the third conduit is arranged in the groove bodies, and the poking block is used for adjusting the extension and retraction of the corresponding conduits.

Preferably, one end of the handle far away from the catheter is provided with a catheter tail connecting wire, and the catheter tail is used for connecting a guide wire.

Preferably, the metal wire is a nickel titanium wire.

Preferably, the metal wire is a stainless steel wire.

The technical scheme has the following advantages or beneficial effects:

the thrombus removal support is composed of a plurality of support net disks, and the outer diameter of each support net disk can be adjusted, so that the thrombus removal support can adapt to different blood vessel sizes, and the damage to the blood vessels is reduced.

Drawings

Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.

FIG. 1 is a schematic structural view of an embodiment of a catheter for an embolectomy stent of the present invention;

FIG. 2 is a schematic view of a catheter body according to an embodiment of the present invention;

FIG. 3 is a schematic view of a stent mesh disk according to an embodiment of the present invention;

FIG. 4 is a schematic view of a catheter for an embolectomy stent according to an embodiment of the present invention, showing the structure of the first, second, and third catheters;

FIG. 5 is a schematic view of a structure of a slot and a poking block disposed on a handle according to an embodiment of the present invention;

FIG. 6 is a schematic view of a catheter for a thrombus removal stent according to an embodiment of the present invention, illustrating the structure of the catheter moving faster than the body of the catheter;

FIG. 7 is a schematic view of the telescopic adjustment structure of the stent mesh disk for the poke-fast movement according to an embodiment of the present invention.

The above reference numerals denote:

1. a handle; 2. a catheter body; 3. a support net plate; 4. a catheter tail; 21. the end of the conduit; 22. a first conduit; 23. a second conduit; 24. a third conduit; 11. a first tank body; 12. a second tank body; 13. a third tank body; 111. dialing by one; 121. dialing a second time; 131. dialing three times; 31. a first bracket disc body; 32. a second bracket disc body; 33. and a disc body III of the bracket.

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.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

The technical scheme of the invention comprises a thrombus taking support catheter.

As shown in FIG. 1, an embodiment of an embolectomy stent catheter comprises:

a handle 1;

one end of thecatheter body 2 is connected with the handle 1;

n external diameter adjustable supportnet dish 3 sets up at the other end ofpipe body 2, and wherein, the support disk body quantity that sets up in the support net dish is ≧ 2.

The existing embolectomy support is fixed in size, and the embolectomy support matched with the size of the existing embolectomy support needs to be selected according to different blood vessel sizes, however, finding the embolectomy support matched with the full size in the actual embolectomy process is difficult and is often close to the size, and thus, the blood vessel is easily damaged. The existing thrombus taking support is very high in fineness because of acting in a blood vessel, so that the size of the whole thrombus taking support is very small, the support is set to be adjustable, the technical difficulty is high, the existing thrombus taking support only can be fixed in size, and various different models are configured to adapt to different blood vessel sizes.

According to the technical scheme, the stentnet disc 3 is provided with a plurality of stent disc bodies, so that the thrombus taking efficiency can be improved, thrombus taking can be completed as soon as possible, residues are reduced, the thrombus taking success rate is improved, on the other hand, each stentnet disc 3 can be adjusted in real time, the outer diameter of onestent net disc 3 can be independently adjusted, other stent net discs are not affected, and different blood vessel sizes and thrombus taking requirements can be better adapted.

In the above technical solution, further, the supportnet tray 3 includes: the three support disc bodies are respectively a firstsupport disc body 31, a secondsupport disc body 32 and a thirdsupport disc body 33, wherein a preset distance is reserved between the adjacent support disc bodies.

In a preferred embodiment, as shown in fig. 2 and 3, thecatheter body 2 comprises:

aconduit end portion 21;

afirst guide pipe 22, one end of which back to the handle 1 is in a conical opening shape;

thesecond guide pipe 23 is sleeved on thefirst guide pipe 22;

thethird guide pipe 24 is sleeved on thesecond guide pipe 23;

as shown in fig. 4, thefirst conduit 22, thesecond conduit 23 and thethird conduit 24 can slide in a telescopic manner;

one end of thestent mesh disc 3 is connected with acatheter end 21, the other end of thestent mesh disc 3 is connected with acatheter III 24, the catheter I22 penetrates through thestent mesh disc 3 to be connected with a joint between the stent disc body I31 and the stent disc body II 32, the joint further comprises a radiopaque marking ring belt, thecatheter II 23 penetrates through thestent mesh disc 3 to be connected with a joint between the stent disc body II 32 and thestent disc body 33, and the joint further comprises a radiopaque marking ring belt.

On the basis of the technical scheme, the supportnet disc 3 is further composed of a plurality of metal wires in a preset shape.

On the basis of the technical scheme, a disc-shaped structure with a wide middle part and two contracted ends is further formed among the plurality of metal wires.

In the technical scheme, the gaps formed between the adjacent metal wires are used for picking up thrombus, and the picked thrombus is accommodated in the inner cavity of the disc-shaped structure.

On the basis of the above technical solution, as shown in fig. 5, the handle 1 is provided with a groove corresponding to thefirst conduit 22 and thesecond conduit 23, respectively, and the groove is provided with a pulling block connected to thefirst conduit 22, thesecond conduit 23, or thethird conduit 24, and the pulling block is used for adjusting the extension and retraction of the corresponding conduit.

Specifically, as shown in fig. 5, the groove body of the handle 1 includes:

the first groove body 11 is provided with afirst poking block 111, wherein thefirst poking block 111 is connected with thefirst guide pipe 22 and used for poking the telescopic movement of thefirst guide pipe 22 so as to adjust the outer diameter of the firstsupport tray body 31.

The second tank body 12 is provided with asecond stirring block 121, wherein thesecond stirring block 121 is connected with thesecond conduit 23 and used for stirring the telescopic movement of thesecond conduit 23 so as to adjust the outer diameter of the secondsupport tray body 32.

Thethird groove body 13 is provided with athird poking block 131, wherein thethird poking block 131 is connected with thethird guide pipe 24 and used for poking thethird guide pipe 24 to stretch and retract, and further adjusting the outer diameter of the thirdsupport bracket disc 33.

Among the above-mentioned technical scheme, through dialling the flexible of the corresponding adjustment pipe of the reciprocating motion in being faster than the cell body, and then control the shrink of supportnet dish 3, supportnet dish 3 is then the external diameter size of corresponding adjustment supportnet dish 3 at the in-process of shrink to the different blood vessel sizes of adaptation.

As shown in fig. 6-7, a specific embodiment is described below, wherein the thirdadjustment bracket tray 33 is taken as an example:

by adjusting thethird stirring block 131 in thethird groove body 13, because thethird stirring block 131 is connected with thethird conduit 24, in the process of stirring thethird stirring block 131 from left to right, thethird conduit 24 moves rightwards along with the stirring, and thethird stent disk 33 with one end connected to thethird conduit 24 body correspondingly pulls along with the stirring along with the rightward movement, so that the outer diameter of thestent disk 33 is reduced greatly, and the adjustment of the outer diameter is realized.

The adjustment modes of other support disc bodies are the same as the principle, the movement of the catheter is realized by stirring the corresponding stirring speed, and then the change of the outer diameter of the support disc body is driven, and the details are not repeated here.

In a preferred embodiment, the end of the handle 1 remote from the catheter is provided with a catheter tail 4 for connection to a guide wire, the catheter tail 4 being used for connection to a guide wire.

In a preferred embodiment, the metal wire may be a nickel titanium wire or a stainless steel wire, preferably a nickel titanium wire.

In another embodiment, the number of stent disk bodies in thestent disk 3 may also be set to 2, and the structure of thecatheter body 2 corresponding to the stent disk with the specific number of 2 is as follows:

thecatheter body 2 includes:

aconduit end portion 21;

afirst guide pipe 22, one end of which back to the handle 1 is in a conical opening shape;

thesecond guide pipe 23 is sleeved on thefirst guide pipe 22;

wherein, thefirst guide pipe 22 and thesecond guide pipe 23 can relatively slide in a telescopic way;

one end of thestent mesh disk 3 is connected with thecatheter end 21, the other end is connected with thesecond catheter 23, and thefirst catheter 22 passes through thestent mesh disk 3 to be connected with the joint between the firststent disk body 31 and the secondstent disk body 32, wherein the joint further comprises a radiopaque marker ring belt.

In a preferred embodiment, thestent mesh 3 is made up of a plurality of wires in a predetermined shape.

In a preferred embodiment, the handle 1 is provided with a groove corresponding to thefirst conduit 22 and thesecond conduit 23 respectively, and a poking block connected with thefirst conduit 22 or thesecond conduit 23 is arranged in the groove and used for adjusting the extension and retraction of the corresponding conduit.

In a preferred embodiment, the metal wire is a nickel titanium wire.

In a preferred embodiment, the end of the handle 1 remote from the catheter is provided with a catheter tail 4 for connection to a guide wire, the catheter tail 4 being used for connection to a guide wire.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. An embolectomy stent catheter, comprising:

a handle;

the catheter body is connected with the handle at one end;

the support net disc with the adjustable outer diameter is arranged at the other end of the catheter body, wherein the number of support disc bodies arranged in the support net disc is larger than or equal to 2.

2. The embolectomy stent catheter of claim 1, wherein the stent mesh disc comprises: the three support disc bodies are respectively a first support disc body, a second support disc body and a third support disc body, wherein a preset distance is reserved between every two adjacent support disc bodies.

3. The embolectomy stent catheter of claim 2, wherein the catheter body comprises:

the end of the conduit;

one end of the first conduit, which is back to the handle, is a conical opening;

the second guide pipe is sleeved on the first guide pipe;

the third guide pipe is sleeved on the second guide pipe;

the first guide pipe, the second guide pipe and the third guide pipe can relatively stretch and slide;

one end of the support net disc is connected with the end part of the conduit, the other end of the support net disc is connected with the conduit III, the conduit I is connected with the joint between the support disc body I and the support disc body II, and the conduit II is connected with the joint between the support disc body II and the support disc body III;

the stent mesh disc and the catheter connecting part are provided with radiopaque marker rings.

4. The embolectomy stent catheter of claim 1, wherein the stent mesh disc is comprised of a plurality of wires in a predetermined shape.

5. The thrombectomy stent catheter according to claim 2, wherein each stent tray is formed of a plurality of wires into a disc-like structure with a wide middle portion and two contracted ends.

6. The embolectomy stent catheter of claim 2, wherein the stent mesh disc is integrally formed.

7. The thrombus removal support catheter according to claim 2, wherein the handle is provided with a groove corresponding to the first catheter and the second catheter and the third catheter respectively, a poking block connected with the first catheter or the second catheter or the third catheter is arranged in the groove, and the poking block is used for adjusting the extension and retraction of the corresponding catheter.

8. The embolectomy stent catheter of claim 1, wherein one end of the handle away from the catheter is provided with a catheter tail connecting wire, and the catheter tail is used for connecting a guide wire.

9. The embolectomy stent catheter of claim 4 or 5, wherein the metal wire is a nickel titanium wire.

10. The embolectomy stent catheter of claim 4 or 5, wherein the wire is a stainless steel wire.

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