CN218458474U - Multifunctional connecting valve for suction plug - Google Patents

Abstract

The utility model discloses a multifunctional connecting valve for a suction plug, which is provided with a valve seat, and a seat channel is arranged inside the valve seat; the directional joint and the first Ruhr joint respectively extend out from two sides of the valve seat integrally, and joint channels are respectively arranged in the directional joint and the first Ruhr joint; wherein, both sides of the valve seat are respectively provided with a transition channel, and one end of the transition channel is communicated with the seat channel without barrier; the other end of the transition passage is in barrier-free communication with the joint passage. The transition channel is arranged on each side of the valve seat, the transition channel can butt the seat channel of the valve seat and the joint channel without dead angles, and thrombus can flow in the channel without blocking openings, thereby smoothly flowing; even if the thrombus is slightly fouled, the fouled thrombus can be removed by the plug, and the clogging of the thrombus at the connection valve can be further reduced by increasing the inner diameter of the seat passage.

Description

Multifunctional connecting valve for suction plug

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to multifunctional connecting valve for suction plug.

Background

Pulmonary Embolism (PE) is the third leading cause of cardiovascular death after coronary heart disease and stroke. The minimally invasive intervention is a mainstream trend and an emerging technology for treating acute pulmonary embolism at present, and in order to match reusability and high efficiency of negative pressure use of a transcatheter pulmonary artery thrombus extraction system in an interventional thrombus extraction process, a three-way valve with a luer connector is generally used as an auxiliary instrument for sucking and extracting thrombus in the prior art. The conventional three-way valve shown in fig. 1 has a valve seat 10, a valve element 11 disposed in the valve seat, and a directional connector 12 and a luer connector 13 on both sides. It can be seen from the figure that the seat channel 14 in the valve seat 10 is very small, and the inner diameter is only 20% -40% of the size of the joint channel 15, so that the joint channel 15 in the directional joint 12 on one side is not consistent with the size of the seat channel 14, a blocking point 16 is formed, and a slightly larger thrombus is easy to block at the blocking point, so that the negative pressure suction cannot be carried out. Therefore, the design of the connecting valve which can be adapted to the negative pressure devices with different interfaces and has no clogging risk on the valve core is of great use significance and value.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel can not cause stifled multi-functional connecting valve for suction bolt to silt up, the disk seat passageway in to the connecting valve among the prior art is too little, forms the jam mouth with the intercommunication that connects the passageway, and the thrombus silts up the technical problem here easily, the utility model aims to provide a novel can not cause silting up stifled.

The utility model discloses a multifunctional connecting valve for suction plug has:

a valve seat having a seat passage therein;

the directional joint and the first Ruhr joint respectively extend out from two sides of the valve seat integrally, and joint channels are respectively arranged in the directional joint and the first Ruhr joint;

wherein,

the two sides of the valve seat are respectively provided with a transition channel,

one end of the transition passage is in barrier-free communication with the seat passage;

the other end of the transition passage is in barrier-free communication with the joint passage.

Preferably, an inner diameter of one end of the transition passage is of a size corresponding to an inner diameter of the seat passage.

Preferably, the inner diameter of the other end of the transition passage is the same as the inner diameter of the joint passage.

Preferably, the inner diameter of the transition channel is gradually and continuously increased from one end to the other end, and the angle alpha formed by the side edge of the transition channel and the shaft axis is between 5 and 20 ℃.

Preferably, the first and second air flow paths are arranged in parallel,

said valve seat having a core bore perpendicular to said seat passage;

the multifunctional connecting valve for the suction bolt is also provided with a valve core, the valve core is rotatably arranged in the core hole in a penetrating way, and the valve core is provided with a core channel which can be linearly communicated with the seat channel without obstacles.

Preferably, the multifunctional connecting valve for a hydrant has:

the second luer connector is vertically arranged on the pipeline of the directional connector;

and the blanking plug can block the directional connector, one section is arranged in the pipeline of the directional connector, and the other section is arranged in the second luer connector.

Preferably, the plug has:

the spring is arranged in the pipeline of the directional joint, and one end of the spring is fixed on the inner wall of the pipeline of the directional joint;

the cylinder is movably arranged in the second Ruhr joint in a penetrating mode, the other end of the spring is fixedly connected with the bottom surface of the cylinder, a cylinder core channel and a cylinder cross channel which are mutually communicated are arranged in the cylinder, and the cylinder cross channel can be communicated with the seat channel through a joint channel and a transition channel of the directional joint.

Preferably, the stopper has:

a ball disposed within the conduit of the directional joint, the ball having a ball passage in unobstructed communication with the joint passage of the directional joint and a ball cross-over passage in communication with the seat passage through the joint passage and the transition passage of the directional joint;

the cylinder is movably arranged in the second Ruhr joint in a penetrating mode, the spherical surface of the rotary ball is fixedly connected with the bottom surface of the cylinder, a column core channel is arranged in the cylinder, and the column core channel is communicated with the ball cross channel.

Preferably, ,

the ball cross-track is perpendicular to the ball channel.

Preferably, the top surface of the cylinder has a slot.

Preferably, the fitting passage is of the same size as the inner diameter of the ball passage.

Preferably, the first and second air flow paths are arranged in parallel,

the inner surface of the directional joint is provided with a bayonet, a TUP pipe is connected in the bayonet, and the inner diameter of a joint channel of the directional joint is consistent with that of the TUP pipe.

Preferably, the multifunctional connecting valve for a hydrant further includes:

and one end of the movable joint is vertically arranged on the valve seat, and a movable channel which can be communicated with the seat channel is arranged in the movable joint.

Preferably, the first and second air flow paths are arranged in parallel,

the movable joint is provided with a sealing nut.

Preferably, ,

inner diameter of the seat passage: the inner diameter of the joint channel is 0.5-1: 1.

another object of the utility model is to provide a double-deck pipe system for cooperating to get bolt support suction bolt, including a double-deck sheath pipe subassembly, double-deck sheath pipe subassembly includes:

the far end of the inner sheath tube is provided with a far-end expansion section, and the near end of the inner sheath tube is connected with the multifunctional connecting valve for the suction plug through a sheath tube connecting piece;

one end of the double-layer sheath pipe connecting valve is connected with the inner sheath pipe, and the inner sheath pipe can be fastened or loosened;

and the outer sheath pipe is connected with the other end of the double-layer sheath pipe connecting valve, and the far end of the outer sheath pipe can be axially extended or retracted by the far end expanding section.

Preferably, after the double-layer catheter system reaches the designated position in the blood vessel, the double-layer sheath connecting valve is released, the inner sheath and the outer sheath can axially move relatively to push the inner sheath to the far end along the axial direction, the far end expansion section extends out of the outer sheath, and the far end expansion section expands to provide a double-layer sheath channel for the thrombus taking stent;

when the thrombus is grabbed by the thrombus taking support and pulled back to the middle section of the distal expansion section area, the inner sheath tube is synchronously retracted, the inner sheath tube is matched with the thrombus taking support to wholly coat the thrombus and withdraw to the inside of the outer sheath tube, and then the thrombus is extracted out of the body through the double-layer catheter system.

Preferably, the proximal end of the outer sheath is provided with a handle with a luer connector, the outer sheath is fixed with the double-layer sheath connecting valve through the luer connector, and the proximal end of the outer sheath does not extend out of the proximal end of the double-layer sheath connecting valve.

Preferably, the double-layer sheath connection valve includes:

the outer wall of the near end is provided with a near end external thread, and the inner wall of the near end is provided with a stepped hole;

the sealing ring is positioned in the stepped hole;

the first nut is arranged in the middle of the inner wall and extends to the far end, the first nut is in threaded connection with the near end external thread, and the far end of the extending pipe abuts against the near end of the sealing ring.

Preferably, the inner diameter of the stepped bore decreases from the proximal end to the distal end;

the axial length of the sealing ring is not more than that of the stepped hole, and the outer diameter of the sealing ring is equal to the minimum inner diameter of the stepped hole.

Preferably, the first nut does not disengage from the connection cavity after being unscrewed.

Preferably, the sealing ring is a silicone ring or a rubber ring with elastic deformation.

Preferably, the distal outer wall of the connecting cavity has a distal first external thread and a distal second external thread, the distal second external thread is located on the distal side of the distal first external thread;

the luer connector of the outer sheath is in threaded connection with the distal second outer thread;

the double-layer sheath pipe connecting valve further comprises:

a second nut that, when threaded onto the distal first external thread, confines the luer fitting within the second nut.

Preferably, the double-layer sheath connection valve further comprises:

an emptying pipe which is communicated with the inside and the outside of the connecting cavity;

and the emptying valve is fixed on the emptying pipe and allows the gas in the connecting cavity to flow outwards in a one-way mode through the emptying pipe.

Preferably, the proximal end of the inner sheath is inserted from the distal end of the outer sheath and pushed axially out towards the proximal end of the outer sheath until the distal dilating segment of the inner sheath is retracted back inside the distal end of the outer sheath.

Preferably, when the distal dilating segment of the inner sheath is contracted inside the distal end of the outer sheath, the proximal end of the inner sheath may penetrate the outer sheath and protrude from the proximal end of the double-layer sheath connection valve, and the axial length of the protruding part is greater than that of the distal dilating segment;

when the distal end expansion section of the inner sheath tube extends out of the distal end of the outer sheath tube, the distal end expansion section is unfolded to be in a bell mouth shape, and the unfolded distal end expansion section is attached to the inner wall of a blood vessel.

Preferably, the distal end expanding section is of a circular truncated cone annular structure, the inner diameter of the proximal end of the distal end expanding section is smaller than that of the distal end, and the proximal end of the distal end expanding section is integrally connected with the distal end of the inner sheath tube.

Preferably, the inner wall of the distal expansion section is provided with a reinforcing rib along the circumferential direction, and the length direction of the reinforcing rib is axial.

Preferably, the reinforcing rib is an arc-shaped protrusion, and the protrusion of the reinforcing rib faces the central line of the inner sheath tube.

Preferably, the reinforcing rib extends proximally to a proximal inner wall of the inner sheath.

Preferably, the reinforcing rib is a stainless steel reinforcing rib made of stainless steel.

Preferably, the outer surface of the distal expansion section is a smooth surface, and the distal tail end of the distal expansion section is provided with a closed end to avoid scratching the inner wall of the blood vessel.

Preferably, the distal end expansion section is uniformly divided into a plurality of lotus petals along the circumferential direction, and the distal end expansion section is formed by the lotus petals in a lotus petal shape.

Preferably, the distal dilating segment has a three-layer structure, and the inner layer of the distal dilating segment has elasticity greater than that of the outer layer.

Preferably, the three-layer structure of the distal end expansion section is respectively a first rubber layer, an intermediate metal mesh layer and a second rubber layer from outside to inside, and the elasticity of the second rubber layer is greater than that of the first rubber layer.

Preferably, the proximal end of the inner sheath tube is provided with a proximal end expanding section, the proximal end expanding section is of a circular truncated cone annular structure, the distal end inner diameter of the proximal end expanding section is smaller than the proximal end inner diameter, and the distal end of the proximal end expanding section is integrally connected with the proximal end of the inner sheath tube.

Preferably, in the expanded state, the maximum diameter of the distal dilating segment is greater than the maximum diameter of the proximal dilating segment.

Preferably, the sheath connector has a tee, and the proximal end of the inner sheath is connected to the TUP tube of the directional connector of the multifunctional connector valve for a stopcock through the tee of the sheath connector.

Compared with the prior art, the beneficial effects of the utility model are that:

1) The utility model increases the inner diameter of the seat channel, and the degree of setting the inner diameter of the seat channel and the inner diameter of the joint channel to be 0.5-1 can reduce the occurrence of clogging;

2) The transition channel is respectively arranged on the two sides of the valve seat, the transition of the transition channel can connect the seat channel of the valve seat with the joint channel without dead angles, and thrombus flows in the channel without a blocking opening, thereby smoothly flowing;

3) The utility model discloses under the condition of jam is formed in the seat passageway of disk seat, be provided with the blanking plug in the directional joint, with the negative pressure that becomes silted up stifled through the blanking plug formation in the seat passageway and reverse suction, can reach the purpose that becomes silted up stifled.

4) The sheath tube is designed into a double-layer structure, the far end of the inner sheath tube is provided with a far end expansion section, the far end expansion section can be folded in the outer sheath tube, and the matched thrombus taking support is used for taking thrombus, so that the condition that the thrombus is broken due to shrinkage deformation in the process of grabbing the thrombus to enter the sheath tube channel is avoided, and the large thrombus is further coated. The probability of broken thrombus remaining in the blood vessel is reduced, and the success rate and the operation convenience of the operation are improved.

5) And the double-layer sheath tube connecting valve is designed, so that the inner sheath tube and the outer sheath tube can move relatively, and the operation is convenient.

6) The device is simple and easy to assemble, easy to operate and easy to popularize, the injury to patients is small through an intervention mode, and the adverse symptoms of serious patients suffering from large-area embolism can be effectively relieved.

7) The sheath tube connecting piece can be well matched with other components such as the dilator component, the negative pressure aspirator or the embolectomy component for use, only the extrusion tube on the sheath tube connecting piece needs to be simply screwed or loosened, the dilator component, the negative pressure aspirator or the embolectomy component inside can be immediately locked or loosened, the structure is simple, and the operation is convenient.

8) By optimizing the structural design of the thrombus taking support, the problem that the double pulmonary branch is damaged in the process of grabbing aortic thrombus near the double pulmonary branch by the conventional support is solved;

9) The thrombus taking support is connected and fixed simply and conveniently by optimizing the connection relation between the thrombus taking support and the guide head, the push pipe and the control piece, the deformation problem of the thrombus taking support is greatly reduced, the thrombus taking support has a better expansion state, thrombus can be grabbed by the maximum grab, the thrombus can be gathered easily, when withdrawing, the contraction deformation is buffered, the loss of the thrombus is avoided, the operation of a doctor is facilitated, and the operation time is shortened.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art junction valve;

fig. 2 is a schematic perspective view of the connection valve of the present invention;

fig. 3 is a schematic sectional three-dimensional structure of the connection valve of the present invention;

fig. 4 is a schematic cross-sectional view of the connecting valve of the present invention;

fig. 5 is a schematic cross-sectional three-dimensional structure of another example of the connection valve of the present invention;

FIG. 6 is a schematic perspective view of the blanking plug;

fig. 7 is a schematic structural view of a double-layer sheath assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of the distal expansion segment of FIG. 7 collapsed at the distal end of the sheath;

fig. 9 is a schematic structural view of a double-layer sheath connection valve according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of FIG. 9;

FIG. 11 is an exploded view of FIG. 9;

FIG. 12 is an exploded cross-sectional view of FIG. 11;

fig. 13 is a schematic structural view of another embodiment of the double-layer sheath connection valve of the present invention;

FIG. 14 is a cross-sectional view of FIG. 13;

fig. 15 is a schematic structural view of an inner sheath according to an embodiment of the present invention;

fig. 16 is a schematic view of an embodiment of the distal expansion segment of the present invention;

FIG. 17 is a front view of FIG. 16;

FIG. 18 is an enlarged partial view of FIG. 17;

fig. 19 is a connection diagram of an embodiment of a double-layer sheath assembly according to the present invention;

fig. 20 is a schematic structural view of an embodiment of a third nut of the present invention;

FIG. 21 is a cross-sectional view of FIG. 20;

fig. 22 is a schematic structural view of a sheath connector according to an embodiment of the present invention;

FIG. 23 is a schematic view of the alternative angular configuration of FIG. 22;

fig. 24 is a schematic view of an assembly structure of the elastic tube, the extrusion tube and the two gaskets of the present invention;

fig. 25 is a schematic structural view of an embodiment of the dilator assembly of the present invention;

FIG. 26 is a schematic view of a bolt assembly according to an embodiment of the present invention;

fig. 27 is a schematic view of an assembly structure of the push rod, the control member and the embolectomy device of the present invention;

fig. 28 is a perspective view of an embodiment of fig. 27 except for the proximal hub;

FIG. 29 is a perspective view of a portion of the structure of FIG. 28;

FIG. 30 is a schematic structural view of an embodiment of a thrombectomy support according to the present invention;

fig. 31 and 32 are schematic diagrams of an application of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

In the present invention, the "unobstructed communication" means that the inner diameters of the two communicating channels are approximately close to each other, and therefore, the communication that is not silted up is not caused, and the better mode is a straight line communication.

The utility model discloses a multifunctional connecting valve for suction plug can be two-way valve, also can be three-way valve, perhaps cross valve. As shown in fig. 2 to 4, the present example is illustrated by taking a three-way valve as an example, the three-way valve has a valve seat 20 on the body, and the valve seat 20 has a seat passage 21 inside, for example, the size of the seat passage is set between 2.7 mm and 3.6 mm; the valve seat 20 has a core hole perpendicular to the seat passage 21. The valve core 30 is rotatably inserted into the core hole as in the case of the prior art, and the valve core 30 has a core passage that can be linearly communicated with the seat passage 21 without hindrance, for example, the inner diameter of the core passage is identical to that of the seat passage 21, so that there is no hindrance to the flow. When the valve core 30 is rotated clockwise, for example, by 90 ° clockwise, the core passage of the valve core 30 and the seat passage 21 are in seamless butt communication, and fluid can smoothly flow through the three-way valve. When the valve element 30 is rotated counterclockwise, for example, by 90 ° counterclockwise, the core passage of the valve element 30 is completely displaced from the seat passage 21 and cannot flow, and the three-way valve is closed.

In this example, the two sides of the three-way valve body are respectively provided with a directional joint 40 and a first luer joint 50, the directional joint 40 integrally extends from one side of the valve seat 20, and the directional joint 40 is internally provided with a joint channel 41. A first luer 50 integrally extended from the other side of the valve seat 20, the first luer 50 having a connector channel 51 therein; inner diameter of seat passage 21: the inner diameter of the joint passage 41, 51 is 0.5 to 1:1. the valve seat 20 has transition passages 23a, 23b inside one and the other sides, respectively. The inner diameter of one end of the transition passage 23a, 23b is the same as the inner diameter of the seat passage 21, and the inner diameter of the other end of the transition passage 23a, 23b is the same as the inner diameter of the joint passage 41, 51, so that one end of the transition passage 23a, 23b communicates with the seat passage 21 without hindrance; the other ends of the transition passages 23a, 23b are in barrier-free communication with the joint passages 41, 51, while the inner diameters of the transition passages 23a, 23b are gradually and continuously increased from one end to the other end, for example, the angle alpha formed by the side edges of the transition passages 23a, 23b and the axial line is between 5 and 20 ℃, so that a straight line type barrier-free communication passage is formed among the whole seat passage 21, the transition passages 23a, 23b and the joint passages 41, 51, thrombus can smoothly flow in the whole passage without resistance, and the possibility of clogging is reduced.

In the present example, the three-way connection valve has a second luer fitting 60, the second luer fitting 60 being arranged vertically on the tubing of the orientation fitting 40; the inner surface of the directional adapter 40 has a bayonet, into which the TUP pipe 70 is connected, and the inner diameter of the adapter passage 41 of the directional adapter 40 coincides with the inner diameter of the TUP pipe 70, and in the case of the coincidence of the inner diameters, an unobstructed flow is also formed here. An obturator which can block the orientation connector 40 is arranged in the second luer connector 60, one section of the obturator is arranged in the pipeline of the orientation connector 40, and the other section of the obturator is arranged in the second luer connector 60. In one example, the occluder has a cylinder 71 and a spring 72, the cylinder 71 being movably disposed within the second luer fitting 60, and the spring 72 being disposed within the conduit of the directional fitting 40. One end of the spring 72 is fixed on the inner wall of the pipeline of the directional joint 40; the other end of the spring 72 is fixedly connected with the bottom surface of the cylinder 71. The TUP tube 70 may be split opposite the seat channel 21 of the valve seat 20 when the cylinder 71 of the obturator is pressed inwards from the second luer fitting 60, the cylinder 71 having a cylinder core channel 711 and a cylinder cross channel 712 communicating with each other, the cylinder cross channel 712 being communicable with the seat channel 21 through the fitting channel 41 and the transition channel 23a of the directional fitting 40. Under normal operation, the joint channel 41 where the spring 72 is located is unobstructed. When thrombus accumulation clogging exists in the area of the seat channel 21 in the three-way valve, the cylinder 71 is pressed inwards, the joint channel 41 of the directional joint 40 is divided into two sections by the cylinder 71, then the two sections are connected to the second luer 60 by using a negative pressure injector or other simple negative pressure devices to carry out negative pressure flow division, and the thrombus accumulated and clogged in the area of the seat channel 21 of the three-way valve is sucked through the column core channel 711 and the column cross channel 712 to accelerate the flow, so that the operation efficiency is improved.

In another example, as shown in fig. 5 to 6, the plug has a cylinder 73 and a ball 74, the cylinder 73 is movably inserted into the second luer 60, a core passage 731 is formed in the cylinder 73, and a locking groove 732 is formed on the top surface of the cylinder 73. The rotary ball 74 is arranged in the pipeline of the directional joint 40, the spherical surface of the rotary ball 74 is fixedly connected with the bottom surface of the cylinder 73, the rotary ball 74 is provided with a ball channel 741 which can be communicated with the joint channel 41 of the directional joint 40 without obstruction, for example, the inner diameters of the joint channel 41 and the ball channel 741 are the same, namely, the inner diameter of the ball channel 741 is in seamless butt joint with the joint channel 41. The ball 74 also has a ball cross-way 742 that can communicate with the seat channel 21 through the joint channel 41 and the transition channel 23 of the orienting joint 40; the ball ramp 742 communicates with the post-core passage 731. It is possible that the ball cross-over 742 may or may not communicate with the ball channel 741. Under normal operation, the ball channel 741 of the rotary ball 74 is unobstructed from the joint channel 41. When thrombus accumulation clogging exists in the area of the seat channel 21 in the three-way valve, the rotary ball 74 is rotated by a certain angle, such as 90 degrees, through the clamping groove 732, the joint channel 41 of the directional joint 40 is divided into two sections by the rotary ball 74, the ball cross passage 742 of the rotary ball 74 communicates the seat channel 21 with the column core channel 731, then the second luer 60 is connected with a negative pressure injector or other simple negative pressure device for negative pressure shunting, and thrombus accumulated in the area of the seat channel 21 of the three-way valve is sucked through the column core channel 731 and the ball cross passage 742, so that the circulation is accelerated, and the operation efficiency is improved.

In the two examples, after each thrombus is sucked, the adaptive blanking plug can be introduced from the second luer 60 to block the blood flow or the air flow in the direction of the TPU pipe, so that a closed loop structure is formed inside the whole three-way valve, thrombus residue inside the valve core can be completely removed before the next product system sucks the thrombus through negative pressure, and the risk of cleaning the thrombus residue inside the backflow body is effectively prevented.

In this example, the multi-function connection valve for a pipette has a movable joint 80 having one end vertically disposed on the valve seat 20, and the movable joint 80 has a movable passage 81 communicating with the seat passage 21 inside. The movable joint 80 has a closure nut 82 thereon. Normally, the nut 82 is in a closed state.

The multifunctional connecting valve for the suction plug of the utility model has the working principle that,

the TUP pipe 70 is connected with the inside of a human body, the movable joint 80 is in a closed state, the second Ruhr joint 60 is also in a closed state, the first Ruhr joint 50 of the three-way valve connected by the negative pressure aspirator sucks the thrombus under the action of negative pressure, and because the connection among all channels is the connection with the integral inner diameter without jumping change, no clogging point exists, the blockage at an interface section can be avoided in the thrombus suction process, and the repeatability and the high efficiency of the thrombus suction step of the product are improved.

Even if the thrombus accumulates and clogs on the seat channel 21 of the valve seat 20, the TUP tube 70 at the distal end of the adapter channel 41 can be temporarily isolated by the occluder and connected to the second luer connector 60 by the aspirator to aspirate the inside of the valve seat 20, so that the accumulated thrombus in the seat channel 21 can be dispersed and the first luer connector 50 can be aspirated again, thereby reducing the clogging problem.

The present example provides an application example of a multifunctional connecting valve for a stopcock, which is used in a double-layer catheter system for cooperating with a stopcock holder stopcock.

Referring to fig. 7, a double-layered catheter system for combining with a thrombus-aspiration of a thrombus-aspiration stent comprises a double-layered sheath assembly 100, wherein the double-layered sheath assembly 100 comprises an inner sheath 110, a double-layered sheath connection valve 120, and an outer sheath 130, a sheath connection member 140 is connected to a proximal end of the inner sheath 110, the sheath connection member 140 has a tee 141, and a TUP tube 70 of a directional joint 40 of a multifunctional connection valve for a thrombus aspiration is connected to one port of the tee 141.

Referring to fig. 7 and 15, the distal end of the inner sheath tube 110 has a distal expansion section 111. Referring to fig. 7, one end of the double-layered sheath connection valve 120 is connected to the inner sheath 110, and the double-layered sheath connection valve 120 may fasten or unfasten the inner sheath 110. The outer sheath 130 is connected to the other end of the double-layered sheath connection valve 120, and the distal end of the outer sheath 130 can be axially extended or retracted by the distal expansion section 111 of the inner sheath 110. As shown in fig. 7, the distal dilating segment 111 extends out of the distal end of the outer sheath 130, and as shown in fig. 8, the distal dilating segment 111 is retracted inside the distal end of the outer sheath 130.

The utility model discloses a double-deck sheath pipe subassembly 100 combines the design of distal end expansion section 111, and the support thrombectomy is got in the cooperation, avoids thrombectomy support to get and leads to the broken condition of aggravation thrombus because of the shrink deformation in snatching thrombus entering sheath pipe passageway in-process, further cladding bold thrombus. The probability of broken thrombus remaining in the blood vessel is reduced, and the success rate and the operation convenience of the operation are improved.

In some embodiments, referring to fig. 7, the proximal end of the outer sheath 130 is provided with a handle with a luer 131, the outer sheath 130 is fixed with the double-layer sheath connection valve 120 through the luer 131, and the proximal end of the outer sheath 130 does not protrude from the proximal end of the double-layer sheath connection valve 120.

In some embodiments, referring to fig. 9-12, the double-layer sheath connection valve 120 includes a connection cavity 121, a sealing ring 122, and a first nut 123.

The connection cavity 121 is a tubular body with two open ends and a hollow interior, the outer wall of the proximal end of the connection cavity 121 has a proximal external thread 1211, and the inner wall of the proximal end of the connection cavity 121 has a stepped hole 1212. The seal ring 122 is located within the stepped bore 1212. An extension tube 1231 extending towards the far end is arranged in the middle of the inner wall of the first nut 123, and when the first nut 123 is screwed with the proximal external thread 1211, the far end of the extension tube 1231 abuts against the proximal end of the sealing ring 122.

In some embodiments, the inner diameter of the stepped bore 1212 decreases gradually from the proximal end to the distal end; the axial length of the seal ring 122 is not greater than the axial length of the stepped bore 1212, and the outer diameter of the seal ring 122 is equal to the minimum inner diameter of the stepped bore 1212. During tightening of the first nut 123 threaded with the proximal external thread 1211, the extension tube 1231 pushes the sealing ring 122 to gradually press like a distal movement, thereby shrinking the gap in the stepped hole 1212 and locking the inner sheath 110. First nut 123 is unscrewed, and the inside space of shoulder hole 1212 slightly is greater than interior sheath pipe 110 external diameter, and the near-end of sheath pipe 110 can be to the distal end propelling movement in holding for the distal end expansion section 111 of interior sheath pipe 110 stretches out in the distal end of outer sheath pipe 130, and distal end expansion section 111 expands naturally and laminates with the vascular wall inner wall.

In some embodiments, the first nut 123 does not disengage from the connection cavity 121 after being unscrewed. To prevent the first nut 123 from falling off.

In some embodiments, the sealing ring 122 is a silicone ring or a rubber ring with elastic deformation. To achieve compression fixation of the inner sheath 110 or release of the inner sheath 110 after recovery.

In some embodiments, referring to fig. 9-12, the distal outer wall of the connection cavity 121 has a distal first external thread 1213 and a distal second external thread 1214, the distal second external thread 1214 being located on a distal side of the distal first external thread 1213. The luer 131 of the outer sheath 130 is screwed with the distal second external thread 1214, and the double-layer sheath connection valve 120 is fixed with the outer sheath 130 through the threaded connection of the distal second external thread 1214 and the luer 131.

The double-layered sheath connection valve 120 further includes a second nut 124, the second nut 124 being threadably coupled to the distal first external thread 1213, the second nut 124, when threadably coupled to the distal first external thread 1213, trapping the luer 131 within the second nut 124. So as to realize more reliable fixation of the double-layer sheath connection valve 120 and the outer sheath 130.

In some embodiments, referring to fig. 13 and 14, the double-layer sheath connection valve 120 further includes an evacuation pipe 125 and an evacuation valve 126, the evacuation pipe 125 is connected to the inside and the outside of the connection cavity 121, the evacuation valve 126 is fixed on the evacuation pipe 125, and the evacuation valve 126 allows the gas in the connection cavity 121 to flow out in one direction through the evacuation pipe 125. So as to discharge the air in the connection cavity 121 in one direction during the process that the extension tube 1231 pushes the sealing ring 122 to gradually move like a distal end.

In some embodiments, the proximal end of the inner sheath 110 is inserted from the distal end of the outer sheath 130 and pushed axially out of the proximal end of the outer sheath 130 until the distal dilating segment 111 of the inner sheath 110 is retracted back inside the distal end of the outer sheath 130.

In some embodiments, when the distal dilating segment 111 of the inner sheath 110 is collapsed inside the distal end of the outer sheath 130, the proximal end of the inner sheath 110 may extend through the outer sheath 130 and protrude from the proximal end of the double-layered sheath connection valve 120, and the axial length of the protruding portion is greater than the axial length of the distal dilating segment 111.

In some embodiments, when the distal dilating segment 111 of the inner sheath 110 extends beyond the distal end of the outer sheath 130, the distal dilating segment 111 is flared into a flared shape, and the flared distal dilating segment 111 is attached to the inner wall of the blood vessel.

In some embodiments, referring to fig. 16 to 18, the distal expansion section 111 is a circular truncated cone ring-shaped structure, the proximal inner diameter of the distal expansion section 111 is smaller than the distal inner diameter, and the proximal end of the distal expansion section 111 is integrally connected with the distal end of the inner sheath tube 110.

In some embodiments, the inner wall of the distal expansion section 111 is provided with a reinforcing rib 1111 along the circumferential direction, and the length direction of the reinforcing rib 1111 is axial. As shown in fig. 16, sixteen reinforcing ribs 1111 are uniformly provided in the circumferential direction. The design of strengthening rib 1111 can increase outside expansion force, has the guide effect again simultaneously, makes things convenient for the support to carry.

In some embodiments, the reinforcing rib 1111 is an arc-shaped protrusion, and the protrusion of the reinforcing rib 1111 faces the center line of the inner sheath tube 110. The arcuate projection may be a semi-circular projection or a part-circular projection.

In some embodiments, referring to fig. 17, the reinforcing ribs 1111 extend proximally to the proximal inner wall of the inner sheath 110.

In some embodiments, the reinforcing ribs 1111 are stainless steel reinforcing ribs using stainless steel.

In some embodiments, the outer surface of the distal dilating segment 111 is smooth, and the distal end of the distal dilating segment 111 has a constriction to avoid scratching the inner wall of the blood vessel.

In some embodiments, the distal expansion section 111 is circumferentially and uniformly divided into a plurality of lotus petals 1112, and the distal expansion section 111 is surrounded by the lotus petals 1112 to form a lotus petal shape. As shown in FIG. 17, the distal dilating segment 111 is evenly divided into four petal heads 1112. The distal expansion section 111 is evenly divided into a lotus petal shape formed by a plurality of lotus petal heads 1112, so that the lotus petal is more convenient to fold.

In some embodiments, referring to fig. 17 and 18, the distal dilating segment 111 is a three-layer structure, with the inner layer of the distal dilating segment 111 having a greater elasticity than the outer layer.

In some embodiments, referring to fig. 18, the three-layer structure of the distal dilating segment 111 is, from the outside to the inside, a first rubber layer 1113, an intermediate metal mesh layer 1114 and a second rubber layer 1115, respectively, the elasticity of the second rubber layer 1115 being greater than the elasticity of the first rubber layer 1113.

In some embodiments, referring to fig. 15, the proximal end of the inner sheath 110 has a proximal expansion section 112, the proximal expansion section 112 has a circular truncated cone-shaped annular structure, the distal inner diameter of the proximal expansion section 112 is smaller than the proximal inner diameter, and the distal end of the proximal expansion section 112 is integrally connected with the proximal end of the inner sheath 110.

In some embodiments, in the expanded state, the maximum diameter of the distal dilating segment 111 is greater than the maximum diameter of the proximal dilating segment 112.

In some embodiments, the inner sheath 110 is made of a mixture of one or more of PEBAX, PTFE, polymeric materials, stainless steel.

In some embodiments, the inner sheath 110 has a wall thickness of between 0.6mm and 1.0mm, and the distal dilating segment 111 has a wall thickness of between 1mm and 1.5 mm.

In some embodiments, the outer sheath 130 is made of a blend of one or more of PEBAX, PTFE, polymeric materials, stainless steel.

In some embodiments, the double-layered sheath assembly 100 further comprises a developing ring disposed at the distal end of the outer sheath 130.

In some embodiments, the visualization ring and the outer sheath 130 are mixed and fixed by one or more of PEBAX, PTFE, polymer materials, stainless steel.

In some embodiments, the developer ring is made of a mixture of any one or more of nickel titanium wire, platinum iridium wire, or platinum tungsten wire.

In some embodiments, the double-layer sheath connection valve 120 is made of one or more of PP, silicone, or polymer materials.

In some embodiments, referring to fig. 7 and 8, the dual-layered catheter system for engaging a thrombectomy stent thrombus further comprises a sheath connector 140, the sheath connector 140 being in communication with the inner sheath 110. The sheath connector 140 is combined with the proximal end of the inner sheath 110 by fixing and thread compacting, and has the following specific structure:

referring to fig. 19 to 21, the sheath connector 140 has a tee 141, a boss 142, and a third nut 143. The distal end of tee bend 141 and the near-end intercommunication of interior sheath pipe 110, the middle part of boss 142 has the UNICOM passageway along the axial, and boss 142 sets up the distal end at tee bend 141, and the distal end external diameter of boss 142 is less than near-end external diameter, and the outer wall of boss 142 is fixed with the inner wall of near-end expansion section 112, can adopt the sticky mode during the fixed. An expansion section accommodating groove is formed in the third nut 143, and when the third nut 143 is in threaded connection with the distal end of the tee, the proximal end expansion section 112 and the boss 142 are locked in the expansion section accommodating groove to fix the proximal end of the inner sheath.

In some embodiments, referring to fig. 22-24, sheath connector 140 has a tee 141, a resilient tube 144, an extruded tube 145, and two shims 146. The tee 141 is a T-shaped non-standard connector, for example, and the proximal end thereof is connected to the proximal end of the inner sheath 110. The far end of the elastic tube 144 abuts against the near end of the tee 141 by means of a gasket 146 and is communicated with the tee 141; the elastic tube 144 is a hollow tubular body with two open ends and a middle part contracting to the middle part along the radial direction, i.e. the outer surface is concave along the axial direction, the elastic tube is made of rubber material and is extruded by the extrusion tube 145 to seal the inner sheath tube 110. The inner half of the extrusion tube 145, i.e., the distal end of the transition inner tube 1451, abuts against the proximal end of the elastic tube 144 via the gasket 146 and is in communication with the elastic tube 144 to reduce the wear of the tee and the extrusion tube 145 on both ends of the extrusion tube 145 during the rotational extrusion process. The outer half part of the extrusion tube 145, namely the extrusion outer tube 1452, is sleeved outside the transition inner tube 1451, is fixedly connected with the transition inner tube 1451, and is movably locked outside the proximal section of the tee 141; the transition inner tube 1451 does not extend beyond the distal end of the extruded outer tube 1452 of the sheath connector 140 to facilitate passage of other components into and/or out of the sheath connector 140. The extruded tube 145 has a coupling ring 1453, an intermediate inner tube 1451 is coupled within the ring of the coupling ring 1453, and an extruded outer tube 1452 is coupled outside the coupling ring 1453. The intermediate inner tube 1451, the connecting ring 1453 and the extruded outer tube 1452 are integrally formed. Also within the transition inner tube 1451 is a raised ring 1451a. The sheath tube connecting member 140 is formed by combining one or more of PP, silica gel, and polymer materials, and the elastic tube 144 silica gel inside the extrusion tube 145 can achieve a completely sealed sealing effect by rotating a nut knob of the extrusion tube 145, thereby simplifying product design.

The inner surface of the extruded outer tube 1452 has at least one internal thread 1452a, such as two internal threads 1452a, 1452b, and the proximal outer portion of the tee 141 has at least one external thread 141a, such as two external threads 141a, 141b, at corresponding positions, the internal thread 1452a of the extruded outer tube 1452 is screwed on the external thread 141a of the tee 141, and the internal thread 1452b of the extruded outer tube 1452 is screwed on the external thread 141b of the tee 141, so that the extruded elastic tube 144 is deformed to form an end seal. The outer tube 1452, which is squeezed by the outside of the distal section of the squeeze tube 145, latches on the outside of the proximal section of the tee 141 to squeeze the elastic tube 144 to deform, thereby further sealing the proximal section of the tee 141 by the distal end of the elastic tube 144 and indirectly sealing the inner sheath 110.

In some embodiments, referring to fig. 25, the double-layered catheter system for cooperating with thrombus extraction stent further comprises a dilator assembly 200 insertable into the inner sheath 110 through the sheath connector 140 of the double-layered sheath assembly 100, the dilator assembly 200 being screwed and fixed through the extruded tube of the sheath connector 140 for guiding the inner sheath 110, the dilator assembly 200 being fixed by one or more of LDPE, HDPE, PP, PDFE, PA12, carbon fiber, glass fiber, and polymer material. Dilator assembly 200 has a dilation tube 210, a dilation tip 220, and a dilation handle 230. The dilating tube 210 may be inserted into the inner sheath tube 110, and the dilating tube 210 may have a core portion perforated to allow entry of thrombus and passage of a guide wire. The expansion head end 220 is a hollow cone-like shape, is used for guiding the inner sheath tube 110, is connected to the distal end of the expansion tube 210, and can be exposed out of the distal end of the inner sheath tube 110; the expansion head end 220 drives the double-layer sheath assembly 100 to enter the body along the guide wire, and guides the double-layer sheath assembly 100 to establish a sheath channel; the dilating tip 220 is conical, has a smooth surface without acute angles, and avoids scratching blood vessels of a human body. A handle 230 for expansion is connected to the proximal end of the expansion tube 32 and exposed to the proximal end of the inner sheath 110 for operating the dilator assembly 200 to perform a guiding operation; at least one power assisting member 231 is provided on the outer circumference of the handle 230, and the power assisting member 231 extends outward along the outer circumference of the handle 230.

In some embodiments, the double-layer catheter system for cooperating with the thrombus extraction stent comprises a guide wire, and the dilator assembly 200 drives the double-layer sheath assembly 100 into the body along the guide wire to guide the double-layer sheath assembly 100 to establish the sheath channel.

In some embodiments, referring to fig. 26, the double-layered catheter system for engaging a thrombectomy stent thrombus further comprises a thrombectomy assembly 300, wherein the thrombectomy assembly 300 can be disposed through the inner sheath 110 of the double-layered sheath assembly 100 for thrombectomy.

In some embodiments, referring to fig. 26, the embolectomy assembly 300 has a pusher tube 310, a hemostasis Y-valve 320, a control 330, and an embolectomy device 340.

The pushing tube 310 can movably penetrate through the inner sheath tube 110 of the double-layer sheath tube assembly 100; the push tube 310 is made of one or more of PEBAX, PTFE, polymer material, and stainless steel, the push tube 310 can pass through the double-layered sheath assembly 100 to reach the target site of pulmonary thrombosis, and the sheath connector 140 can press the elastic tube 144 through the threaded pressing outer tube 1452 to lock the push tube 310. The hemostasis Y-valve 320 is communicated with the proximal end of the pushing tube 310 through an inner sheath connector (the inner sheath connector is made of one or more of PC and polymer material), the hemostasis Y-valve 320 can be exposed out of the proximal end of the double-layer sheath assembly 100, the end of the inner sheath connector is a standard luer, and can be connected with the hemostasis Y-valve 320 through a luer connector, and the drawing and positioning of the control element 330 can be realized through a knob of the hemostasis Y-valve 320. The control member 330 may be sequentially inserted through the push tube 310 and the hemostasis Y-valve 320, the control member 330 passing through an inlet end of the hemostasis Y-valve 320, and a proximal end being exposed to the hemostasis Y-valve 320; the other inlet end of the hemostasis Y-valve 320 is connected with the standard two-way connector through a luer connector, and can be closed by a luer cap or used as a spare connector for connecting other products. The proximal end of the embolectomy device 340 is fixed with the pushing tube 310, the distal end of the embolectomy device 340 is fixed with the distal end of the control member 330, and the embolectomy device 340 can be pressed and held in the inner sheath 110 by the control member 330, so as to deliver the embolectomy device 340 to a target position for embolus removal near the distal end of the inner sheath 110. The introduction, removal and positioning of the control member 330 of the embolectomy device 340 is controlled by the luer fitting connection to a standard hemostatic Y-valve 320.

In some embodiments, the embolectomy device 340 comprises a plurality of interconnected thrombus-accommodating cavities, wherein the thrombus-accommodating cavities are woven mesh structures, and the thrombus-accommodating cavities 541 are made of self-expanding materials.

In some embodiments, referring to fig. 26-29, the embolectomy device 340 has an embolectomy support 341 and a guiding head 342, the embolectomy support 341 is made of a wire harness and has a mesh, the distal outer diameter of the embolectomy support 341 is smaller than the proximal outer diameter, and an intermediate fixation sleeve is disposed on the embolectomy support 341. The guide head 342 is located at the distal end of the embolectomy stent 341. The distal end of the pushing tube 310 is located inside the thrombectomy holder 341, and the pushing tube 310 is a hollow structure with two open ends. The distal end of the control member 330 is fixedly connected to the distal end of the embolectomy holder 341 and the guide head 342. When the control member 330 moves axially, the thrombectomy holder 341 and the guide head 342 are carried along.

In some embodiments, the control member 330 is co-axial with the thrombectomy stent 341, and the control member 330 limits expansion or contraction of the thrombectomy stent 341.

In some embodiments, the control member 330 is attached to the interior of the guide head, the control member 330 is integrally connected to the distal wire bundle of the thrombectomy support 341 via a distal retaining sleeve 343, and the outer surface of the distal retaining sleeve 343 is attached to the proximal interior of the guide head 342, such that the outer wall of the distal end of the control member 330, the distal wire bundle of the thrombectomy support 341, and the guide head 342 are integrally connected via the distal retaining sleeve 343.

In some embodiments, the distal fixation sleeve 343 is attached to the guide head 342, the embolectomy support 341, and the control member 330 by one or more of heat staking, barbed, or raised connections.

In some embodiments, the proximal end of the control member 330 exceeds the proximal end of the push tube 310 by a length of at least 80mm when the embolectomy stent 341 is axially stretched to a maximum displacement, and the embolectomy stent 341 remains parallel against the control member 330.

In some embodiments, a washer is disposed inside the push tube 310, a through hole is disposed in the middle of the washer, and the control member 330 passes through the through hole to ensure the coaxiality of the push tube 310 and the control member 330.

In some embodiments, the control member 330 is a piston-type control member 330 formed by mixing one or more of PEBAX or PTFE polymer materials.

In some embodiments, the embolectomy device is further provided with at least one proximal fixation sleeve 344, and the proximal wire bundle of the embolectomy holder 341 is inserted into a gap between the proximal fixation sleeve 344 and the pushing tube 310 to fix the proximal wire bundle of the embolectomy holder 341.

In some embodiments, the proximal fixation sleeve 344 is attached to the thrombectomy stent 341 and the pusher tube 310 by one or more of heat fusion bonding, barbed attachment, or raised attachment.

In some embodiments, the proximal harness of the thrombectomy stent 341 is provided with a visualization ring 345, and the pushing tube 310, the proximal harness of the thrombectomy stent 341 and the visualization ring 345 are connected into a whole through a proximal fixing sleeve 344.

In some embodiments, the distance between the developer ring 345 and the proximal disk end of the thrombectomy support 341 is no more than 5mm, preferably between 4mm and 5 mm.

In some embodiments, the proximal fixation sleeve 344 has a length of 3cm to 4cm.

In some embodiments, referring to fig. 28, the embolectomy stent 341 comprises at least two mesh discs 3411, wherein the at least two mesh discs 3411 are integrally formed by a wire harness and have mesh openings, wherein the mesh discs 3411 are hollow inside, and wherein the mesh discs 3411 can be in an expanded state or a contracted state. The outer diameters of the at least two mesh discs 3411 increase in order from the distal end to the proximal end, and the increase may be performed in a linear manner. Each of the mesh disks 3411 has a proximal end and a distal end in a collapsed configuration, each of the mesh disks 3411 has a proximal bundle of wires at the proximal end in the collapsed configuration, and each of the mesh disks 3411 has a distal bundle of wires at the distal end in the collapsed configuration.

The utility model discloses a get and tie support 341 aims at snatching the pulmonary artery thrombus that is close to two lung branches through the different net disk 3411 structural design of a plurality of external diameters, and net disk 3411 of distantly can accessible go deep into two lung branches and do not harm the branch arteries and veins wall, has solved the problem that the big net disk of self-expanding can't release smoothly inside the lung branches arteries and veins, slows down the injury of net disk release to the blood vessels wall.

In some embodiments, as shown in fig. 28, there are three mesh disks 3411, from proximal to distal, mesh disk 3411a, mesh disk 3411b, and mesh disk 3411c, respectively. The three discs 3411 are tapered in outer diameter from the proximal end to the distal end, i.e., the most proximal disc 3411a has the largest outer diameter and the most distal disc 3411c has the smallest outer diameter. The proximal wire harness of the net disk 3411a is wrapped in the distal inner wall of the push tube 310 as the proximal wire harness of the thrombectomy stent 341, and is preferably connected into a whole by a proximal fixing sleeve. The distal wire harness of the mesh 3411c is wrapped around the distal outer wall of the control member 330 as the distal wire harness of the thrombectomy holder 341, and is preferably fixedly attached to the proximal interior of the guide head 342 by a distal fixation sleeve.

In some embodiments, the proximal wire harness and the distal wire harness between two adjacent net discs 3411 are integrally connected to form a net disc connecting section after being shaped by a mold during heat setting, referring to fig. 28, an intermediate fixing sleeve 346 is sleeved outside the net disc connecting section, and the wire harnesses between two adjacent net discs 3411 are integrally connected through the intermediate fixing sleeve 346.

When the net disc 3411 is a plurality of and for from the expanded structure, at the release with retrieve the in-process, comparatively easy deformation, this kind of deflection is great, for the controllability of deflection, the utility model discloses an add the fixed cover 346 in the middle between two adjacent net discs 3411 and come the internal diameter size of circle between the net disc 3411, can make the expansion that the net disc 3411 can be fine when releasing, also can be with fine withdrawal to the inner sheath intraductal of net disc 3411 when drawing a bundle.

In some embodiments, the intermediate retention sleeve 346 is attached to the mesh disk attachment section by one or more of heat staking, barbed attachment, or raised attachment.

In some embodiments, as shown in fig. 28, there are three mesh disks 3411, mesh disks 3411a, 3411b, and 3411c, respectively, from the proximal end to the distal end. Intermediate fixing sleeves 346 are sleeved between the net discs 3411a and 3411b and between the net discs 3411b and 3411c.

In some embodiments, when the embolectomy holder 341 has multiple mesh discs 3411, the distal end of the pusher tube 310 passes through the central axis of at least two of the mesh discs 3411, and the distal end port of the pusher tube 310 does not exceed the distal end port of the distal-most intermediate fixation sleeve 346.

In some embodiments, referring to fig. 31, the double-layered catheter system of the present invention reaches a desired location in a blood vessel, such as a target thrombus 400, through the sheath channel, and the distal dilating segment 111 is retracted into the outer sheath 130 before the thrombus removal stent 341 is released in the blood vessel 500, and the double-layered sheath connection valve 120 fastens the inner sheath 110.

Referring to fig. 32, the thrombus taking stent 341 is released, after the thrombus taking stent 341 is released in the blood vessel 500, the double-layer sheath tube connecting valve 120 is released, the inner sheath tube 110 and the outer sheath tube 130 can move axially relative to each other, the inner sheath tube 110 is pushed to the far end along the axial direction, the far end expansion section 111 extends out of the outer sheath tube 130, the far end expansion section 111 expands and is attached to the inner wall of the blood vessel 500, a double-layer sheath tube channel is provided for the thrombus taking stent 341, and the probability that thrombus is broken and scattered due to deformation aggravated in the process that thrombus is grabbed by the thrombus taking stent and enters the inner sheath tube 110 is favorably reduced.

When the thrombus taking support 341 grabs the target thrombus 400 and is pulled back to the middle section of the area of the distal expansion section 111, negative pressure is introduced by adopting a three-way valve, the thrombus 400 is taken, and the thrombus can be extracted for multiple times. In this case, a small amount of thrombus fragments may exist, and then the thrombus removal stent 341 is withdrawn to collect a small amount of thrombus fragments, and the inner sheath 110 is simultaneously withdrawn, so that the inner sheath 110 cooperates with the thrombus removal stent 341 to wholly coat the target thrombus 400 and withdraw the thrombus into the outer sheath 130, thereby drawing the thrombus out of the body through the double-layer catheter system.

When the thrombus causes aggregation and clogging on the seat channel 21 of the valve seat 20 in the process of thrombus removal of the target thrombus 400 by the double-layer catheter system, the TUP tube 70 at the far end of the connector channel 41 can be temporarily separated by the occluder, the aspirator is connected to the second luer connector 60 to aspirate the interior of the valve seat 20, so that the aggregated thrombus in the seat channel 21 can be dispersed, and then the aspiration is carried out at the first luer connector 50 again, so that the clogging problem can be reduced, and the thrombus removal success rate can be improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (15)

1. A multifunction connection valve for a suction plug, comprising:

a valve seat having a seat passage therein;

the directional joint and the first Ruhr joint respectively extend out from two sides of the valve seat integrally, and joint channels are respectively arranged in the directional joint and the first Ruhr joint;

it is characterized in that

The two sides of the valve seat are respectively provided with a transition channel,

one end of the transition passage is in barrier-free communication with the seat passage;

the other end of the transition passage is in barrier-free communication with the joint passage.

2. The multi-function connection valve for a pipette as recited in claim 1, wherein the inner diameter of one end of the transition passage is the same size as the inner diameter of the seat passage.

3. The multi-function connection valve for a pipette as recited in claim 1, wherein the other end of the transition passage has an inner diameter which is the same as the inner diameter of the joint passage.

4. The multi-functional connection valve for a stopcock according to claim 1, wherein the inside diameter of the transition passage is continuously increased from one end to the other end, and the side of the transition passage forms an angle α with the axis of the multi-functional connection valve between 5 ℃ and 20 ℃.

5. The multi-functional connection valve for a pipette as recited in claim 1,

said valve seat having a core bore perpendicular to said seat passage;

the multifunctional connecting valve for the suction bolt is also provided with a valve core, the valve core is rotatably arranged in the core hole in a penetrating way, and the valve core is provided with a core channel which can be communicated with the seat channel in a straight line without obstacles.

6. The multi-function connection valve for a pipette as defined in claim 1, wherein the multi-function connection valve for a pipette has:

the second luer connector is vertically arranged on the pipeline of the directional connector;

and the blanking plug can block the directional connector, one section is arranged in the pipeline of the directional connector, and the other section is arranged in the second luer connector.

7. The multi-function connection valve for a pipette as recited in claim 6, wherein the stopper has:

the spring is arranged in the pipeline of the directional joint, and one end of the spring is fixed on the inner wall of the pipeline of the directional joint;

the cylinder is movably arranged in the second Ruhr joint in a penetrating mode, the other end of the spring is fixedly connected with the bottom surface of the cylinder, a cylinder core channel and a cylinder cross channel which are mutually communicated are arranged in the cylinder, and the cylinder cross channel can be communicated with the seat channel through a joint channel and a transition channel of the directional joint.

8. The multi-function connection valve for a pipette as recited in claim 6, wherein the stopper has:

a ball disposed within the conduit of the directional joint, the ball having a ball passage in unobstructed communication with the joint passage of the directional joint and a ball cross-over passage in communication with the seat passage through the joint passage and the transition passage of the directional joint;

the cylinder is movably arranged in the second luer connector in a penetrating mode, the spherical surface of the rotary ball is fixedly connected with the bottom surface of the cylinder, a cylindrical core channel is arranged in the cylinder, and the cylindrical core channel is communicated with the ball cross channel.

9. The multi-functional connection valve for a pipette as recited in claim 8, wherein the connection valve is a valve for connecting a pipette to a pipette body

The ball cross-track is perpendicular to the ball channel.

10. The multi-functional connection valve for a pipette plug of claim 8, wherein the top surface of the cylinder has a catching groove.

11. The multi-function connection valve for a pipette as recited in claim 8, wherein the joint passage has a size corresponding to an inner diameter of the ball passage.

12. The multi-functional connecting valve for a straw as set forth in claim 8, wherein the connecting valve is formed of a metal material

The inner surface of the directional joint is provided with a bayonet, a TUP pipe is connected in the bayonet, and the inner diameter of a joint channel of the directional joint is consistent with that of the TUP pipe.

13. The multi-function connection valve for a pipette plug of claim 1, further comprising:

and one end of the movable joint is vertically arranged on the valve seat, and a movable channel which can be communicated with the seat channel is arranged in the movable joint.

14. The multi-functional connection valve for a pipette as recited in claim 13, wherein the connection valve is a valve for connecting a pipette to a pipette body

The movable joint is provided with a sealing nut.

15. The multi-functional connection valve for a pipette as defined in claim 1, wherein

Inner diameter of the seat passage: the inner diameter of the joint channel is 0.5-1: 1.

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