CN111134900B

CN111134900B - Blood diverting device

Info

Publication number: CN111134900B
Application number: CN201911320085.0A
Authority: CN
Inventors: 朱美要; 肖本好; 刘彩萍; 何学
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-10-22
Anticipated expiration: 2039-12-19
Also published as: WO2021121290A1; CN111134900A

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a blood diverting device. The blood diverting device comprises a first sheath tube, a second sheath tube and a filtering unit, wherein the first sheath tube is used for being inserted into a first blood vessel, the second sheath tube is used for being inserted into a second blood vessel, a filtering piece is arranged in the filtering unit, the filtering unit is provided with a first diverting port and a second diverting port, the filtering piece is arranged on a pipeline communicated between the first diverting port and the second diverting port, the first diverting port is communicated with the first sheath tube through a first catheter, the second diverting port is communicated with the second sheath tube through a second catheter, and the filtering unit is also provided with an air outlet respectively communicated with the first diverting port and the second diverting port. According to the blood diverting device provided by the invention, the blood diverting is effectively finished, the risk of patients caused by ischemia of important organs such as brains in operation is reduced, and meanwhile, thrombus in the diverted blood can be filtered, so that the possibility of blocking blood vessels by the thrombus is reduced.

Description

Blood diverting device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a blood diverting device.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

The aortic arch interlayer refers to a separation state that blood in an aortic arch cavity enters an artery middle layer membrane from an aortic arch intima tear part and is separated and expanded along the middle layer membrane to form two true and false cavities of the aortic arch part. The current methods for treating aortic arch dissections mainly include: aortic arch replacement, endoluminal treatment and surgery. Compared with the traditional surgical operation and aortic arch replacement, the intracavitary treatment aortic arch interlayer has the advantages of small damage, few complications, quick postoperative recovery and the like, and becomes one of the guides of the current interventional therapy.

Three aortic branch vessels are arranged above an aortic arch, the condition that the branch vessels are blocked needs to be considered by a method of implanting a bracket at the aortic arch, and at the moment, an aortic arch in-situ windowing operation is adopted, a position close to the mouth end of the branch vessel on a large bracket is accurately opened, and the branch bracket is implanted, so that a passage is constructed. However, during the operation, the problem of temporary blockage of the branch vessel on the aortic arch during windowing is also faced. The existing product-diversion system can solve the problem of temporary blockage of blood vessels theoretically, and the diversion system is respectively connected after the iliac-femoral artery and the carotid artery are respectively punctured. Because the blood pressure difference exists between the iliac-femoral artery blood and the carotid artery blood, the iliac-femoral artery blood is transferred to the carotid artery, and the risk of patients caused by ischemia of important organs such as the brain in the operation is prevented. However, during the blood circulation, the existence of thrombus in the blood can also cause the blockage of blood vessels, thereby causing diseases of important organs such as brain and the like due to ischemia.

Disclosure of Invention

The invention aims to at least solve the problem that blood is easy to cause vessel blockage due to the existence of thrombus in the blood diverting process.

The invention provides a blood diverting device, which comprises:

a first sheath for insertion into a first blood vessel;

a second sheath for insertion into a second blood vessel;

the filter unit, be equipped with in the filter unit and filter the piece, the filter unit is equipped with first commentaries on classics mouth and second commentaries on classics mouth, filter the piece and locate first commentaries on classics mouth with on the pipeline that is linked together between the second commentaries on classics mouth, first commentaries on classics mouth through first pipe with first sheath pipe is linked together, the second commentaries on classics mouth through the second pipe with second sheath pipe is linked together, the filter unit still is equipped with the gas vent, the gas vent respectively with first commentaries on classics mouth with the second commentaries on classics mouth intercommunication.

According to the blood diverting device, the first sheath tube is connected with the filtering unit through the first conduit, the second sheath tube is connected with the filtering unit through the second conduit, and the filtering element is arranged in the filtering unit. Blood filters the thrombus that exists in blood through the filtering action of filtering piece in the filter unit in the process of shunting, thereby guarantee to enter into the blood of intravascular through the sheath pipe and have almost no existence of thrombus, thereby accomplished the shunting of blood effectively, when reducing important organs such as brain in the art and arousing the risk of disease because of ischemia, can also filter the thrombus in the blood of shunting effectively, the possibility that the thrombus blocks up the blood vessel has been reduced, get rid of latent hidden danger for the patient, the security of operation has further been improved.

In addition, the blood diverting device according to the present invention may have the following additional features:

the exhaust port is communicated with a pipeline arranged between the filtering piece and the second flow transfer port, and is used for exhausting gas in the blood flow transfer device and thrombus filtered from blood through the filtering piece.

In some embodiments of the invention, the filter element includes a cylindrical housing and a plurality of mounting plates disposed within the cylindrical housing that cooperate for the passage and filtration of blood.

In some embodiments of the present invention, the plurality of mounting plates are disposed along an axial direction of the cylindrical housing and intersect at an axial position of the cylindrical housing.

In some embodiments of the invention, the filter element comprises a first filter and a second filter, the first filter and the second filter being of an umbrella-like structure and being arranged opposite to each other such that a rebound space is formed between the first filter and the second filter.

In some embodiments of the invention, the filter element is an angled filter element provided with a portion of a filter screen, the filter unit further comprises a first branch, a second branch and a third branch communicating with each other, the filter screen is arranged in correspondence with the first diverting opening and communicates through the first branch, an inlet end of the angled filter element is arranged in correspondence with the second diverting opening and communicates through the second branch, and an outlet end of the angled filter element is arranged in correspondence with the exhaust opening and communicates through the third branch.

In some embodiments of the invention, the filter units are in a Y-shaped or T-shaped distribution.

In some embodiments of the present invention, the filter unit includes a filter cavity, the filter element is disposed in the filter cavity, and an inlet of the filter cavity, the filter element and an outlet of the filter cavity are spaced from bottom to top along a vertical direction.

In some embodiments of the present invention, the blood diverting device further comprises a drawing-off unit, the drawing-off unit is communicated with the exhaust port, and the drawing-off unit is used for drawing off the blood and the thrombus in the filtering unit.

In some embodiments of the invention, the blood diverting device further comprises a collection unit in communication with or part of the filter unit for storing thrombus filtered from the blood by the filter element.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. Wherein:

FIG. 1 is a schematic view of a portion of a blood diverting device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the filter unit of FIG. 1;

FIG. 3 is a schematic view of a portion of the first sheath of FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of a portion of the first conduit of FIG. 1;

FIG. 6 is a schematic view of the first filter element of FIG. 2;

FIG. 7 is a schematic structural view of a filter unit according to another embodiment of the present invention;

FIG. 8 is a schematic structural view of a filter unit according to another embodiment of the present invention;

FIG. 9 is a schematic structural view of a filter unit according to another embodiment of the present invention;

FIG. 10 is a schematic structural view of a filter unit according to another embodiment of the present invention;

fig. 11 is a schematic view of the third filter element of fig. 10;

FIG. 12 is a schematic view of the filter unit of FIG. 2 in a first exhaust state;

FIG. 13 is a schematic illustration of a second exhaust condition of the filter unit of FIG. 2;

FIG. 14 is a schematic view of the filter unit of FIG. 2 in an operating state;

FIG. 15 is a schematic view of the connection structure of the filter unit and the drawing-off unit in FIG. 14;

FIG. 16 is a schematic structural view of the drawing unit in FIG. 15;

the reference numerals in the drawings denote the following:

100: a blood diverting device;

10: first sheath, 11: delivery sheath handle, 111: handle body, 112: first joint, 113: second joint, 114: internal thread, 12: anti-bending sheath, 13: TPU hose, 14: a three-way valve;

20: a second sheath;

30: filtration unit, 31: first branch, 311: first diversion port, 32: second branch, 321: second diversion port, 33: third branch, 331: exhaust port, 341: first filter member, 3411: cylindrical housing, 3412: mounting plate, 342: second filter, 3421: filter screen, 3422: inlet end, 3423: outlet end, 343: third filter, 3431: first filter, 3432: second filter, 35: collection unit, 36: drain valve, 37: drain pipe, 38: exhaust pipe, 39: filter chamber, 391: filter chamber inlet, 392: an outlet of the filter cavity;

40: first conduit, 41: connecting pipe, 42: locking cap, 43: catheter joint, 44: an external thread;

50: a second conduit;

61: first valve, 62: a second valve;

70: a drawing-off unit;

200: thrombosis.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 is a schematic diagram of a partial structure of a blood diverting device 100 according to an embodiment of the present invention. Fig. 2 is a schematic view of a portion of the filter unit of fig. 1. As shown in fig. 1 and 2, the present invention provides a blood diverting device 100, and the blood diverting device 100 includes a first sheath 10, a second sheath 20, and a filtering unit 30. The first sheath 10 is for insertion into a first blood vessel, the second sheath 20 is for insertion into a second blood vessel, and the first filter 341 is provided in the filter unit 30. The filtering unit is further provided with a first diversion port 311 and a second diversion port 321, the first diversion port 311 is communicated with the first sheath pipe 10 through a first conduit 40, the second diversion port 321 is communicated with the second sheath pipe 20 through a second conduit 50, and the first filtering member 341 is arranged on a pipeline communicated between the first diversion port 311 and the second diversion port 321. Wherein the blood pressure in the first blood vessel is less than the blood pressure in the second blood vessel. After the first sheath 10 and the second sheath 20 are inserted into the corresponding blood vessels, respectively, the blood in the second blood vessel can be transferred into the first blood vessel through the blood transfer device 100 depending on the difference in blood pressure. The filter unit 30 is further provided with an exhaust port 331 for exhausting air, and the exhaust port 331 is respectively communicated with the first and

second transfer ports

311 and 321, so that the air in the blood transfer device 100 can be exhausted to the outside of the body through the exhaust port 331 via the third branch 33 forming the exhaust port 331 during the transfer of blood.

According to the blood diverting device 100 of the present invention, the first sheath 10 is connected to the filter unit 30 through the first conduit 40, the second sheath 20 is connected to the filter unit 30 through the second conduit 50, and the first filter 341 is disposed in the filter unit 30, so that blood can automatically flow from one sheath to the other sheath under the action of the blood pressure difference due to the blood pressure difference in the blood vessels in which the first sheath 10 and the second sheath 20 are respectively located when the blood diverting device is used. The blood passes through the filtering function of the first filtering member 341 in the filtering unit 30 during the diverting process, and the thrombus in the blood is filtered, so that the blood entering the blood vessel through the sheath tube is almost free from the thrombus, the diverting of the blood is effectively completed, the risk of patients caused by ischemia of important organs such as brain in the operation is reduced, meanwhile, the thrombus in the diverted blood can be effectively filtered, the possibility of blocking the blood vessel by the thrombus is reduced, potential hidden dangers are eliminated for the patients, and the operation safety is further improved.

In some embodiments of the invention, the first blood vessel is a carotid artery blood vessel and the second blood vessel is an iliac-femoral artery blood vessel. The blood pressure in the carotid artery blood vessel is less than that in the iliac femoral artery blood vessel, the carotid artery blood vessel and the iliac femoral artery blood vessel are communicated through the blood transfer device 100, and the blood in the iliac femoral artery blood vessel can be effectively transferred to the carotid artery blood vessel in the operation, so that the risk of patients caused by ischemia of important organs such as the brain in the operation is reduced.

Fig. 3 is a partial structural view of the first sheath 10 in fig. 1. As shown in fig. 3, in some embodiments of the present invention, the first sheath 10 includes a delivery sheath handle 11, an anti-kink sheath 12, a TPU (polyurethane) hose 13, and a three-way valve 14. The anti-bending sheath 12 and the TPU hose 13 are respectively communicated with the inner cavity of the conveying sheath handle 11, and the TPU hose 13 is communicated with one interface of the three-way valve 14, so that after the anti-bending sheath 12 is inserted into the first blood vessel, the drug can be administered into the anti-bending sheath 12 through the TPU hose 13 and the three-way valve 14, and the affected part can be treated.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3. As shown in fig. 4, in some embodiments of the present invention, the delivery sheath handle 11 includes a handle body 111, a first joint 112 and a second joint 113, and the second joint 113 is internally provided with an internal thread 114 for connecting with the first catheter 40. The junction of handle body 111 and anti sheath pipe 12 is equipped with first conical surface, and the inside of first joint 112 is equipped with the second conical surface that sets up with first conical surface is relative, and the outside of first conical surface is located to anti sheath pipe 12 cover, and second joint 113 is connected back second conical surface with handle body 111 and is further extruded anti sheath pipe 12 to be fixed in between handle body 111 and first joint 112 anti sheath pipe 12. The handle body 111 is provided with a groove at the joint with the TPU hose 13, one end of the TPU hose 13 is inserted into the groove, and the TPU hose 13 is fixed in the groove by glue bonding and other modes.

In some embodiments of the present invention, the second sheath 20 and the first sheath 10 have the same composition and structure, and each includes a delivery sheath handle 11, an anti-bending sheath 12, a TPU hose 13 and a three-way valve 14, which are not described in detail herein. However, since the second sheath 20 and the first sheath 10 are inserted into different objects, the lengths of the anti-bending sheaths 12 of the second sheath 20 and the first sheath 10 are different, and the length of the anti-bending sheath in the second sheath 20 is greater than the length of the anti-bending sheath 12 in the first sheath 10. In other application scenarios, the length of the anti-bending sheath in the second sheath 20 may be set to be less than or equal to the length of the anti-bending sheath 12 in the first sheath 10, as required.

Fig. 5 is a partial structural schematic view of the first guide duct 40 in fig. 1. As shown in fig. 5, the first guide duct 40 includes a connection pipe 41, a locking cap 42, and a duct joint 43. Wherein the left end of the connecting tube 41 is fixedly connected to the right end of the catheter adapter 43 by the locking cap 42 as in the position of fig. 4, and the left end of the catheter adapter 43 is provided with an external thread 44 which can be matched and connected with the internal thread of the second adapter 113, so that the catheter adapter 43 is connected with the delivery sheath handle 11 by thread fit. The right end of the connection pipe 41 is provided in a pointed or inclined structure to facilitate insertion into the filter unit 30.

In some embodiments of the present invention, the second conduit 50 and the first conduit 40 have the same composition and structure, and each includes a connecting pipe 41, a locking cap 42 and a conduit connector 43, and only the specific length of the connecting pipe 41 is different, which is not described herein again.

As shown in fig. 2, in some embodiments of the present invention, the filter unit 30 includes a first branch 31, a second branch 32, and a third branch 33 in a Y-shaped distribution. The first branch 31 is provided with a first diversion port 311, the second branch 32 is provided with a second diversion port 321, the third branch 33 is provided with an exhaust port 331 serving as a passage inlet for exhausting or discharging thrombus, and a collection unit 35 is further provided, the collection unit 35 is communicated with the exhaust port 331, and the collection unit 35 can be communicated with a drain pipe 37 and an exhaust pipe 38 respectively through a drain valve 36. Wherein the first branch 31 is internally provided with a first filter 341. Here, the exhaust port 331 communicates with a pipe provided between the first filter 341 and the second flow port 321, and the exhaust port 331 is not only used for exhausting air but also used for discharging thrombus filtered by the first filter 341 in blood. The filter unit 30 is Y-shaped, so that when the blood flows from the second branch 32 to the first branch 31, the blood is not only filtered by the first filter 341, but also influenced by gravity, so that the thrombus can fall into the exhaust port 331 quickly and directly when contacting the first filter 341. Further, the first filter member 341 is disposed in the first branch 31 near the position where the first branch 31 communicates with the second branch 32, so that when the blood flows from the second branch 32 to the first branch 31, the thrombus filtered by the first filter member 341 is not blocked by other components, and is directly collected or discharged through the exhaust port 331 under the action of gravity.

When it is necessary to perform blood diversion using the blood diversion apparatus 100 of the present embodiment, the first conduit 40 is connected to the first diversion port 311 of the first branch 31, the second conduit 50 is connected to the second diversion port 321 of the second branch 32, and the drain valve 36 is closed so that neither the drain pipe 37 nor the exhaust pipe 38 is in communication with the collection unit 35. When the first valve 61 and the second valve 62 are opened, the blood in the iliac-femoral artery flows into the interior of the filter unit 30 through the second sheath 20 and the second catheter 50 under the action of the blood pressure difference, and flows into the carotid artery through the first catheter 40 and the first sheath 10 after being filtered by the first filter 341, thereby effectively filtering the thrombus in the blood while completing the blood diversion. In the embodiment, the first valve 61 is disposed on the first conduit 40, and the second valve 62 is disposed on the second conduit 50, so as to control the flow of blood in the filtering unit 30 by controlling the opening and closing of the valves. In some other embodiments of the present invention, the first valve 61 may be disposed on the first branch 31, and the second valve 62 may be disposed on the second branch 32, which can also achieve the above-mentioned object.

Fig. 6 is a schematic structural view of the first filter member 341 in fig. 5. As shown in fig. 6, in some embodiments of the present invention, the first filter member 341 includes a cylindrical housing 3411 and a plurality of mounting plates 3412 provided in the cylindrical housing 3411, the plurality of mounting plates 3412 forming passages for blood circulation and filtration therebetween. The inner wall of the lumen of the first branch 31 is provided with a groove matching with the outer shape of the cylindrical housing 3411, and the cylindrical housing 3411 can be clamped in the groove, thereby completing the fixation of the first filter member 341. The cylindrical housing 3411 may be not only cylindrical but also square or irregular cylindrical as long as the gap between the edge thereof and the inner wall of the tubular body is small. The number or density of the plurality of mounting plates 3412 in the cylindrical housing 3411 may be adjusted according to actual needs, as long as the plurality of channels or gaps formed by the plurality of mounting plates 3412 can be made as small as possible to block thrombus without significantly slowing down the flow rate of blood. Further, at least one filter net may be disposed at least one end of the first filter member 341 to filter the thrombus.

The blood passes through the first filter member 341 from the lower right end of the first filter member 341 shown in fig. 5 through passages formed between a plurality of mounting plates 3412, the mounting plates 3412 being arranged in the axial direction of the first branch 31 and having a predetermined length, so that the first filter member 341 can be more stably fixed in the first branch 31. Meanwhile, the thrombus is moved upwards against the gravity, so that the blocking effect of the mounting plate 3412 is further improved. The collection unit 35 is in communication with the exhaust port 36 as a part of the filter unit 30 in the present embodiment, but in another embodiment of the present invention, the collection unit 35 and the filter unit 30 may be separately provided and in communication with each other. Preferably, the collecting unit 35 is a balloon-shaped collector, and the inner wall surface of the balloon-shaped collector is an arc surface facilitating the flow of fluid, thereby facilitating the collection and discharge of thrombus.

In some embodiments of the present invention, the plurality of mounting plates 3412 are disposed along the axial direction of the cylindrical housing 3411 and intersect at the axial position of the cylindrical housing 3411, so that the mounting plates 3412 are disposed in the same direction as the blood flow direction, thereby reducing energy loss during the blood flow process. In other embodiments, the plurality of mounting plates 3412 are arranged to intersect with each other in the axial direction of the cylindrical housing 3411, and the specific form of the intersection is not limited as long as the mounting plates can be fitted together in the axial direction to form a small gap for filtering thrombus, for example, the mounting plates are fitted together to form a cross-sectional mesh shape.

In some embodiments of the invention, the first filter 341 is placed at the entrance of the first branch 31 in order to reduce the residence time of the thrombus in the first branch, eliminating the portion of the thrombus from being pushed by a force of the blood flow upwards along the first branch 31, facilitating the thrombus to slide down inside the collection unit 35.

In some embodiments of the present invention, the first filter 341 may be disposed in the second branch 32 to prevent thrombus in the blood from flowing with the blood into the carotid artery.

In some embodiments of the invention, it is also possible to eliminate the provision of the third branch 33 in the filter unit 30, to provide only the first branch 31 and the second branch 32 communicating with each other, and to provide the filter element and the air outlet 331 in the passage formed by the first branch 31 and the second branch 32. The thrombus in the blood is retained in the filter unit 30 by the filtering action of the filter member, and the thrombus filtered from the blood is removed by replacing the filter unit 30, and the object of the present application can be also achieved.

Fig. 7 is a schematic structural view of a filter unit 30 according to another embodiment of the present invention. As shown in fig. 7, in some embodiments of the present invention, the filter unit 30 includes a first branch 31, a second branch 32, and a third branch 33 in a T-shaped distribution. The first turning port 311 is provided in the first branch 31, the second turning port 321 is provided in the second branch 32, and the exhaust port 331 is provided in the third branch 33. The first filter 341 is disposed in the first branch 31, and the filtered thrombus can flow into the third branch 33 through the exhaust port 331. The filtered thrombus can be discharged out of the filter unit 30 by connecting the third branch 33 to other components.

Fig. 8 is a schematic structural view of a filter unit 30 according to another embodiment of the present invention. In some embodiments of the present invention, the filter unit 30 also includes a first branch 31, a second branch 32 and a third branch 33 which are arranged in a T-shape, the first diversion port 311 is provided in the first branch 31, the second diversion port 321 is provided in the second branch 32, and the exhaust port 331 is provided in the third branch 33. Unlike the embodiment of fig. 7, the filter member in this embodiment is the second filter member 342. The second filter member 342 is a bent filter member provided with a portion of the filter 3421, and the filter 3421 is disposed opposite to the first diverting opening 311. The screen 3421 of the second filter 342 is a metal screen, and the rest is smooth and dense metal. The second filter 342 should be made of a medical alloy, such as nitinol, which is a metal material with considerable safety, stability and biocompatibility. The outer wall of the 90-degree elbow structure of the second filter member 342 is seamlessly attached to the inner walls of the two branches, and the round corners are also tightly attached to ensure that the second filter member 342 is stable and is not easy to slide. The inlet end 3422 of the second filter member 342 is disposed opposite the second transfer port 321, and the outlet end 3423 of the second filter member 342 is disposed opposite the exhaust port 331. The blood enters the interior of the second filter member 342 from the inlet end 3422 of the second filter member 342, and since the filter 3421 is disposed in the second filter member 342, the filter 3421 allows the blood to pass therethrough and blocks the thrombus in the blood from passing therethrough. The thrombectomy-removed blood flows into the first branch 31 through the strainer 3421, and finally flows into the carotid artery through the first diverting port 311, the first catheter 40 and the first sheath 10. The thrombus stays inside the second filter member 342 by the filtering action of the filter net 3421, and finally exits the filter unit 30 through the exhaust port 331 and the third branch 33. The connection mode between the second filter 342 and the second and

third branches

32 and 33 is not limited in particular, and may be various forms such as clamping, gluing or welding.

Fig. 9 is a schematic structural view of a filter unit 30 according to another embodiment of the present invention. In some embodiments of the present invention, the filter unit 30 comprises a first branch 31, a second branch 32 and a third branch 33 in a Y-shaped distribution. The first branch 31 is provided with a first turning port 311, the second branch 32 is provided with a second turning port 321, and the third branch 33 is provided with an exhaust port 331. A second filter 342 is provided in the second branch 32 and the third branch 33. Similarly, the inlet end 3422 of the second filter member 342 is disposed opposite to the second diverting port 321, the outlet end 3423 of the second filter member 342 is disposed opposite to the exhaust port 331, and the filter 3421 is disposed opposite to the first diverting port 311, which operation is identical to that of the embodiment of fig. 8. The specific bending angle of the second filter member 342 can be adjusted according to the arrangement between the second branch 32 and the third branch 33.

Fig. 10 is a schematic structural view of a filter unit 30 according to another embodiment of the present invention. As shown in fig. 10, in some embodiments of the present invention, the filter unit 30 includes a filter chamber 39, and a third filter member 343 is disposed in the filter chamber 39, and the third filter member 343 is disposed in the filter chamber 39. The filter chamber inlet 391, the third filter member 343 and the filter chamber outlet 392 are arranged at intervals from bottom to top in the vertical direction, and the extension direction of the first branch 31 where the filter chamber inlet 391 is located is different from the extension direction of the second branch 32 where the filter chamber outlet 392 is located, in this embodiment, the two extension directions are exactly opposite.

Blood enters the interior of filter cavity 39 through filter cavity inlet 391 and exits filter cavity 39 through filter cavity outlet 392 after being filtered by third filter member 343. The filter inlet 391 and the filter outlet 392 have a certain height difference, so that the blood is in a parallel staggered state in the process of entering and exiting the filter cavity 39, the impact and the climbing of thrombus on the third filter member 343 are reduced, the possibility of blocking the third filter member 343 by the thrombus is reduced, and meanwhile, the space below the filter cavity 39 also has the function of storing the thrombus and finally is discharged out of the filter unit 30 through the exhaust port 331 and the drain valve 36. Specifically, the third filter member 343 may be fixed inside the filter cavity 39 by any one of clamping, gluing or welding.

Fig. 11 is a schematic view of the third filter 343 of fig. 10. As shown in fig. 11, in some embodiments of the present invention, the third filtering member 343 includes a first filter 3431 and a second filter 3432, and the first filter 3431 and the second filter 3432 are both of an umbrella structure and are disposed opposite to each other such that a rebound space is formed between the first filter 3431 and the second filter 3432. Because the first filter screen 3431 has a function of restoring deformation and the second filter screen 3432 has a function of restoring deformation, when the first filter screen 3431 and the second filter screen 3432 are buckled with each other, a space formed between the first filter screen 3431 and the second filter screen 3432 has a certain function of restoring deformation, thereby forming a rebound space.

Above-mentioned structure can improve the anti bending performance and the resilience of filter screen in the third filters 343 effectively, and two-sided net is crisscross arranges and promotes the filter effect, changes in the separation thrombus and passes through. The material of the filter screen should be a metal material with considerable safety, stability and biocompatibility, such as a medical alloy, for example, nitinol.

The third filter element 343 is likewise suitable for the embodiment according to fig. 5 and 7, in which the first filter element 341 is replaced by the third filter element 343. Of course, the first filter element 341 can also be used in the embodiment according to fig. 10. The axial direction of the first filter member 341 should be the same as the axial direction of the filter chamber 39.

Before the blood is diverted by the blood diverting device 100 of the present invention, the gas in the blood diverting device 100 must be discharged. In order to prevent the waste of blood during the exhaust process, the whole filter unit 30 is turned upside down so that the exhaust pipe 38 is disposed above the collection unit 35, and then the exhaust process is performed.

Fig. 12 is a schematic diagram of the filter unit 30 of fig. 2 in a first exhaust state, wherein the hatched area represents the volume occupied by blood after the first exhaust state is completed. First, the first sheath tube 10 and the first branch 11 are evacuated, as shown in fig. 12, the first valve 61 is opened, the second valve 62 is closed, and the drain valve 36 is adjusted to a state where the exhaust pipe 38 is in communication with the collection unit 35 and the drain pipe 37 is not in communication with the collection unit 35. Since the exhaust tube 38 is open to the atmosphere, the blood in the carotid artery blood vessel flows into the interior of the filter unit 30 through the first sheath 10 under the action of the blood pressure, slowly filling the first conduit 40 and the first branch 31. When the first branch 31 is just filled with blood, or a small amount of blood has flowed into the second branch 32, the first valve 61 is closed and the first venting process is ended.

Fig. 13 is a schematic diagram of the filter unit 30 of fig. 2 in a second venting state, wherein the cross-sectional portion is the volume occupied by blood after the second venting state is completed. As shown in fig. 13, when the second valve 62 is opened, the first valve 61 remains closed, the drain valve 36 remains stationary, and the exhaust pipe 38 is kept in communication with the collection unit 35 and the drain pipe 37 is kept in non-communication with the collection unit 35. The blood in the iliac artery blood vessel flows into the inside of the filtering unit 30 through the second sheath 20 under the blood pressure, fills the second conduit 50 and the second branch 32, and finally fills the collecting unit 35 and the line connecting the collecting unit 35 and the drain valve 36 with the blood. Thereby venting all gas within the blood diverting device 100 through the vent tube 38, at which time the second valve 62 and the vent valve 36 are closed and the venting process is complete.

It should be noted that the order of the first exhaust process and the second exhaust process in the exhaust process should be avoided as much as possible, otherwise blood consumption at the carotid artery blood vessel would be increased, which may cause adverse effects on the patient, and the exhaust process should be performed by consuming blood in the iliac artery blood vessel as much as possible while ensuring sufficient exhaust.

Fig. 14 is a schematic structural view illustrating an operation state of the filter unit 30 in fig. 2. As shown in fig. 14, the blood diversion can be performed normally when the air discharge process is finished. Blood in the iliac artery blood vessel flows into the carotid artery blood vessel after being filtered by the filtering unit 30. The filtered thrombus 200 is finally accumulated in the inside of the collection unit 35.

If the thrombus 200 is excessively accumulated in the collection unit 35 during the blood diverting process to obstruct the blood diverting process or reduce the blood diverting efficiency, a drawing unit 70 as shown in fig. 15 may be added to the blood diverting device 100, and the thrombus 200 accumulated in the collection unit 35 is drawn out by the drawing unit 70 to restore the normal blood diverting speed.

Fig. 15 is a schematic view of the connection structure between the filter unit 30 and the drawing unit 70 in fig. 14. Fig. 16 is a schematic structural diagram of the drawing unit 70 in fig. 15. As shown in fig. 15 and 16, the inlet end of the drawing unit 70 is provided with an external screw structure, and the drawing unit 70 is screw-coupled with the drain pipe 37. After the extraction unit 70 in the compressed state is connected to the drainage tube 37, the first valve 61 is closed, the second valve 62 is opened, and the extraction unit 70 is slowly stretched, so that the thrombus 200 in the collection unit 50, the second branch 32 and the third branch 33 is pushed by the double pressure generated by the blood flow and the extraction unit 70 and enters the extraction unit 70 together with a small amount of blood from the drainage tube 37, thereby completing the process of removing the thrombus 200 in the filter unit 30. The drain valve 36 is closed and the first valve 61 is opened to continue the blood diverting process.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A blood diverting device, comprising:

a first sheath for insertion into a first blood vessel;

a second sheath for insertion into a second blood vessel;

the filtering unit is internally provided with a filtering piece, the filtering unit is provided with a first diversion port and a second diversion port, the filtering piece is arranged on a pipeline communicated between the first diversion port and the second diversion port, the first diversion port is communicated with the first sheath pipe through a first conduit, and the second diversion port is communicated with the second sheath pipe through a second conduit; the filtering unit is also provided with an exhaust port which is communicated with the first flow transfer port and the second flow transfer port respectively and used for discharging gas in the blood flow transfer device and thrombus filtered out from blood through the filtering piece.

2. The blood diverting device according to claim 1, wherein said air outlet communicates with a conduit disposed between said filter element and said second diverting port.

3. The blood diverting device according to claim 1, wherein said filter element comprises a cylindrical housing and a plurality of mounting plates disposed within said cylindrical housing, said mounting plates cooperating to communicate and filter blood.

4. The blood diverting device according to claim 3, wherein the mounting plates are disposed along the axial direction of the cylindrical housing and intersect at the axial position of the cylindrical housing.

5. The blood diverting device according to claim 1, wherein the filter element comprises a first filter and a second filter, the first filter and the second filter being umbrella-shaped and facing each other so that a rebound space is formed between the first filter and the second filter.

6. The blood diverting device according to claim 1, wherein said filter element is an angled filter element having a portion of a filter mesh, said filter unit further comprising a first branch, a second branch and a third branch communicating with each other, said filter mesh being disposed in correspondence with said first diverting port and communicating through said first branch, said angled filter element having an inlet end disposed in correspondence with said second diverting port and communicating through said second branch, and an outlet end disposed in correspondence with said air outlet port and communicating through said third branch.

7. The blood diverting device according to claim 1, wherein said filter units are distributed in a Y-shape or T-shape.

8. The device of claim 1, wherein the filter unit further comprises a filter chamber, the filter element is disposed in the filter chamber, and an inlet of the filter chamber, an outlet of the filter element, and an outlet of the filter chamber are vertically spaced from bottom to top.

9. The blood diverting device according to claim 2, further comprising a drawing-off unit in communication with the exhaust port for drawing off blood and thrombus within the filter unit.

10. The blood diverting device according to any of claims 1 to 9, further comprising a collection unit in communication with or part of the filter unit for storing thrombus filtered from the blood by the filter element.