CN215018489U - Thrombus taking device - Google Patents

Abstract

The invention discloses a thrombus taking device, which comprises a far-end holding mechanism and a catheter, wherein one end of the catheter far away from an operator is defined as a far end, one end of the catheter close to the operator is defined as a near end, the catheter comprises a catheter main body and a thrombus collecting far end which is arranged at one end of the catheter main body and has a head end structure with an expandable diameter, the thrombus collecting far end is self-expanding or expanded by balloon assistance, the outer diameter of the expanded thrombus collecting far end can adapt to the inner diameter of a blood vessel where the thrombus collecting far end is positioned, a communicated catheter inner channel is arranged in the catheter main body and the thrombus collecting far end, the far-end holding mechanism comprises a far-end holding sleeve and a plurality of guide wires, the far-end holding sleeve is sleeved on the thrombus collecting far end and is used for containing or releasing the thrombus collecting far end, the invention provides a larger diameter space for the catheter, and the diameter of the catheter is larger, the greater the attraction to the thrombus, thereby increasing the aspiration efficiency.

Description

Thrombus taking device

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of medical instruments, in particular to the technical field of thrombus taking devices for taking out vascular thrombus.

[ background of the invention ]

Thrombi are small patches of blood flow that form on the surface of a denuded or repaired site within a blood vessel of the cardiovascular system. In the variable fluid-dependent type, the thrombus is composed of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells. Thrombosis is a multifactorial process of change that is influenced by the interaction of a set of genetic and environmental factors. Clinically common thrombus patients are mainly characterized by familial inheritance, recurrent attacks, symptom severity, abnormality of thrombus formation sites and younger onset time, and the suspected arterial or venous thrombosis or thromboembolism needs objective basis. Angiography is the reference standard for diagnosis, but superficial blood vessels and the heart can also be examined by well-understood ultrasound tests. Taking out thrombus generated in blood vessels to recanalize the occluded blood vessels is a key for recovering thrombus to block the blood vessels and is also a new field of international blood vessel research at present. However, the current thrombus removal devices have many disadvantages, for example, the existing thrombus removal devices can generate 30% -50% of residues when thrombus removal is carried out, and countless fragments of the existing devices can remain in blood vessels when a catheter enters blood clots, so that the blood flow speed is reduced, and tissue necrosis is caused.

Multiple means are commonly used for removing the endovascular embolism, namely, the thrombus is dissolved by a medicament pouring mode, and the endovascular embolism block is withdrawn by a thrombus removal support in a dragging mode with or without balloon assisted vasodilatation; another is to withdraw the endovascular plug into the catheter, either manually or automatically, using a suction catheter. Several approaches are combined into a very promising system: the thrombus is first dissolved or dragged by chemical or mechanical means, further combined with the aspiration function of the catheter, and the emboli are retrieved into the catheter and then removed from the blood vessel. The key to achieving this technique is to retrieve the clot as completely as possible and maximize aspiration efficiency, with the vessel being completely interrupted and higher aspiration efficiency being achieved with catheters having larger calibers and lumens.

The invention patent of application publication No. CN107205751A discloses a thrombus removal device and a system for taking out thrombus from a blood vessel, which comprises a conveying catheter, an expander catheter and a funnel, wherein the main body of the system is a double-layer pipeline structure comprising the conveying catheter and the expander catheter, so that blood flow can be interrupted, thrombus can be sucked and removed at the same time, but the wall of the double-layer structure has a certain thickness, the inner diameter of the catheter in the blood vessel can be sacrificed to a certain extent, and the sucking efficiency is lost.

[ summary of the invention ]

The invention aims to solve the problems in the prior art, and provides a thrombus taking device which is light in structure, provides a larger diameter space for a catheter, and has larger attraction to thrombus when the diameter of the catheter is larger, so that the suction efficiency is improved.

In order to achieve the above object, the present invention provides an embolectomy device, which comprises a distal holding mechanism and a catheter, wherein one end of the catheter far away from an operator is defined as a distal end, one end close to the operator is defined as a proximal end, the catheter comprises a catheter main body and a thrombus collecting distal end which is arranged at one end of the catheter main body and is provided with a head end structure with an expandable diameter, the thrombus collecting distal end is self-expanding or expanded by balloon assistance, the outer diameter of the thrombus collecting distal end in the expanded state can adapt to the inner diameter of a blood vessel where the thrombus collecting distal end is located, the catheter main body and the thrombus collecting far end are internally provided with communicated catheter inner channels, the far end holding mechanism comprises a far end holding sleeve and a plurality of guide wires, the distal holding sleeve is sleeved on the thrombus collecting distal end for receiving or releasing the thrombus collecting distal end, one end of the guide wire is fixedly connected with the distal holding sleeve and is used for supporting and pulling back the distal holding sleeve.

Preferably, said distal holding mechanism and/or said catheter is provided with a radiographable element which is radiographically developable.

Preferably, the guide wires are connected to the distal holding sleeve in a symmetrical or evenly distributed manner, and the number of the guide wires is 2 to 6.

Preferably, the thrombus collection distal end is shaped in an expanded state as a one-sided closed-off cylinder, a trumpet, or a bell.

Preferably, the thrombus collection distal end include collect distal end skeleton and collect distal end tectorial membrane, collect distal end skeleton for weaving, cutting, spring, concatenation or integrated into one piece's collapsible expansion structure, collect distal end tectorial membrane do collect the outer one deck covering of distal end skeleton, collect under the distal end skeleton expansion state collect distal end tectorial membrane and the cooperation of blood vessel inner wall in order to block the blood flow.

Preferably, still including getting the thrombus device, get the thrombus device including can follow get the embolus outer tube and slidable locate of getting that the passageway passes in the catheter tube the inside internal tube of getting the thrombus of getting the embolus outer tube, the thrombus that has the diameter and can enlarge head end structure of getting embolus inner tube one end pushes back the distal end, the thrombus pushes back the distal end compressible take in extremely get inside the embolus outer tube, the thrombus pushes back the distal end for self-expanding or utilize the supplementary expansion inflation formula of sacculus, the thrombus pushes back outer diameter can adapt to under the distal end expansion state the thrombus pushes back the internal diameter of the blood vessel that the distal end got into.

Preferably, be close to on the thrombi of taking embolia inner tube the thrombus that the distal end was pushed back to the thrombus is equipped with and is used for catching thrombus and snatchs the filter screen, thrombus snatchs the filter screen and has shape memory characteristic can be compressed and accomodate to in taking embolia outer tube.

As preferred, the thrombus pushes back the distal end including pushing back distal end skeleton and pushing back distal end tectorial membrane, push back distal end skeleton for weave, cutting, around spring, concatenation or integrated into one piece's collapsible expansion structure, it does to push back the distal end tectorial membrane push back the outer one deck covering of distal end skeleton, push back under the distal end skeleton expansion state push back distal end tectorial membrane and the cooperation of blood vessel inner wall in order to block the blood flow.

Preferably, an embolectomy inner tube channel through which a medical guide wire can pass is arranged in the embolectomy inner tube.

Preferably, the embolectomy inner tube is formed by spirally winding the whole hose, and an embolectomy inner tube coating for wrapping the hose is arranged outside the embolectomy inner tube.

Preferably, the tube is provided with a plurality of lotion injection ports which penetrate the stent graft and are provided toward the inner wall of the blood vessel.

Preferably, the washing solution ejection port is provided obliquely so that the liquid ejected through the washing solution ejection port is ejected obliquely toward the distal end away from the thrombus push-back end.

Preferably, the real-time injection amount of the liquid into the washing liquid injection port is equal to the real-time extraction amount of the catheter.

Another object of the present invention is to provide the thrombus removal device as described above, wherein a guide wire holding sleeve for fixing the guide wire is sleeved on the catheter, a guide wire groove is formed on the guide wire holding sleeve and arranged along the guide wire holding sleeve, and the guide wire is slidably arranged in the guide wire groove.

It is still another object of the present invention to provide an embolectomy device as described above, wherein the guide wire is disposed on the outer wall of the catheter main body, and an interconnected guide wire outer net frame is disposed between the guide wire and the guide wire.

The thrombus taking device has the beneficial effects that: the thrombus is collected by the thrombus collecting distal end, the thrombus collecting distal end has the shape memory characteristic, and can be attached to the inner wall of the blood vessel after being released in the blood vessel, the catheter is manually or automatically sucked, so that the thrombus in the blood stream can be recovered into a channel in the catheter through the thrombus collecting distal end with the larger flaring at the distal end of the catheter, the thrombus taking is more complete, the thrombus taking efficiency is higher, the residue is avoided, and the thrombus body is prevented from being broken in the thrombus taking process to cause certain danger. This device structure is light, it provides bigger diameter space for the pipe to connect the distal end through the seal wire and keep the sleeve pipe, the pipe diameter is big more, it is big more to the thrombus appeal, thereby improve suction efficiency, it is used for getting the bolt with the pipe cooperation to set up and gets the bolt device, it can pass from the pipe inner channel of pipe to get the bolt outer tube, collect distal end cooperation suction with the thrombus, can take out all thrombus, avoid the thrombus fragment to escape from the inflow blood vessel, flow around along with blood and cause certain danger, improve and get the bolt security, improve and get the bolt success rate, it is more thorough to get the bolt, avoid remaining.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic view of a distal holding mechanism and a catheter in a delivery state according to an embodiment of the present invention.

FIG. 2 is a schematic view of the distal holding mechanism and the catheter in an embolectomy state according to an embodiment of the embolectomy device of the present invention.

FIG. 3 is a schematic view of the distal holding structure of an embolectomy device and catheter approaching thrombus according to the present invention.

FIG. 4 is a schematic view of the distal holding sleeve of an embolectomy device of the present invention in a configuration in which the thrombus-collecting distal end is withdrawn for release.

FIG. 5 is a schematic drawing showing the construction of a thrombus removal device during suction.

FIG. 6 is a schematic view of the catheter retraction of an embolectomy device of the present invention with the collection distal end of the thrombus-collecting distal encapsulating plug block retracted into the distal holding mechanism.

FIG. 7 is an enlarged view of the distal thrombus-collecting end of an embolectomy device of the present invention.

FIG. 8 is a schematic structural diagram of a thrombus removal device according to a second embodiment of the present invention.

FIG. 9 is an enlarged view of the thrombus pushing-back distal end of an embolectomy device of the present invention.

FIG. 10 is an enlarged structural view of a thrombus removal device of the present invention.

FIG. 11 is an enlarged cross-sectional view of the inner tube of the thrombectomy device of the present invention.

FIG. 12 is a schematic diagram of a thrombus removal device according to the present invention.

FIG. 13 is a schematic view of a three-sectional structure of an embodiment of a thrombus removal device according to the present invention.

FIG. 14 is a schematic diagram of a third front view of an embodiment of a thrombus removal device according to the present invention.

FIG. 15 is a schematic front view of a thrombus removal device according to an embodiment of the present invention.

In the figure: 1-distal end holding mechanism, 2-catheter, 3-blood vessel, 4-embolism block, 5-embolism extraction device, 21-guide wire holding sleeve, 101-distal end holding sleeve, 102-guide wire, 103-guide wire outer net rack, 201-thrombus collection distal end, 202-catheter main body, 211-guide wire groove, 2011-collection distal end skeleton, 2012-collection distal end coating, 51-embolism extraction outer tube, 52-embolism extraction inner tube, 53-thrombus push-back distal end, 54-thrombus grasping filter screen, 521-hose, 522-thrombus extraction inner tube coating, 5211-lotion jet orifice, 531-push-back distal end skeleton, 532-push-back distal end coating.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail through the accompanying drawings and embodiments. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the product of the present invention is usually placed in when used, and are only for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. . Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1, 2, 3, 4, 5 and 6, the invention provides an embolectomy device comprising a distal holding mechanism 1 and a catheter 2. The end of the catheter 2 distal to the operator is defined as the distal end and the end proximal to the operator as the proximal end. The catheter 2 includes a catheter body 202 and a thrombus-collecting distal end 201 having an expandable diameter tip structure provided at one end of the catheter body 202. The thrombus collection distal end 201 is self-expanding. The outer diameter of the expanded state of the thrombus collection distal end 201 can be adapted to the inner diameter of the blood vessel in which the thrombus collection distal end 201 is located. The catheter main body 202 and the thrombus collection distal end 201 are provided with an intra-catheter channel communicating therewith. The distal holding mechanism 1 comprises a distal holding sleeve 101 and several guide wires 102. The distal retaining sleeve 101 is positioned over the thrombus collecting distal end 201 for receiving or releasing the thrombus collecting distal end 201. One end of the guide wire 102 is fixedly connected to the distal holding sleeve 101 for supporting and retracting the distal holding sleeve 101. According to the embodiment, the thrombus collecting distal end 201 is arranged to collect the thrombus block 4, the thrombus collecting distal end 201 has the shape memory characteristic, the thrombus collecting distal end 201 can be attached to the inner wall of a blood vessel after being released in the blood vessel, manual or automatic suction is carried out on the catheter, the thrombus collecting distal end 201 of the thrombus block 4 in the blood flow through the large flaring of the distal end of the catheter can be recovered to a channel in the catheter, the distal end holding structure 1 is sleeved outside the distal end of the catheter, and the position close to the thrombus block 4 is guided in the blood vessel 3 through the guide wire 102 or other devices. An auxiliary thrombectomy tool, such as a drug, a thrombectomy stent, or a balloon catheter, may be passed through the catheter interior and delivered to the thrombi 4. After the position is confirmed, the distal holding structure 1 is withdrawn by pulling the guidewire 102 connected to the distal holding sleeve 101, so that the distal holding sleeve 101 is expanded and clings to the blood vessel. Suction is applied through the catheter body 202 using the auxiliary device to fully withdraw the plug 4 into the catheter. After confirming that the plug 4 has fully entered the catheter, the catheter is withdrawn and re-entered into the distal holding structure 1, thereby retrieving the device as a whole. The bolt block 4 is taken out, the bolt taking is more complete, the bolt taking efficiency is higher, the residue is avoided, and the bolt body is prevented from being broken in the bolt taking process to cause certain danger. The device is light in structure, a larger diameter space is provided for the catheter by connecting the guide wire 102 with the distal holding sleeve 101, the larger the diameter of the catheter is, the larger the attraction force to the plug block 4 is, and therefore the suction efficiency is improved.

Referring to fig. 1, 2, 3, 4, 5 and 6, the distal holding mechanism 1 and the catheter 2 are provided with a developable element that is developable under radiation. The visualization element is arranged to facilitate positioning of the devices during surgery, to facilitate quick finding of the plugs 4 and removal of the plugs 4, and to improve the safety of the surgery.

Referring to fig. 1, 2, 3, 4, 5 and 6, the number of the guide wires 102 is one or more, and when the number of the guide wires 102 is more, the guide wires 102 are connected to the distal holding sleeve 101 in a symmetrical or uniform distribution. The number of the guide wires 104 is 2 to 6, and further, the number of the guide wires 102 is 4. The guide wires 102 are uniformly distributed, so that the positions of the distal holding sleeve 101 are uniformly and synchronously stressed when the guide wires 102 are pulled, and the lateral deviation caused by uneven stress at the positions of the distal holding sleeve 101 in the process of pulling the guide wires 102 is avoided.

Referring to fig. 2, the thrombus collection distal end 201 is shaped in an expanded state as a bell with a side cuff. Collect distal end 201 with the thrombus and set up to the distal end have great opening, the near-end cylinder, the tubaeform, the bell-shaped and be convenient for with the cooperation of blood vessel inner wall of converging, the thrombus is collected the great opening of distal end 201 and is convenient for after strutting with the cooperation of blood vessel inner wall, improves connection stability and leakproofness, is convenient for collect the chock 4, the near-end mouth of converging can be convenient for with the cooperation intercommunication of pipe main part 202.

Referring to fig. 7, the thrombus collection distal end 201 includes a skeleton 2011 and a covering membrane 2012. The skeleton 2011 is composed of a three-dimensional nickel-titanium alloy mesh. The frame 2011 is an integrally formed retractable structure. The covering film 2012 is a covering outside the skeleton 2011. The scaffold 2011 in the expanded state the membrane 2012 engages the inner wall of the blood vessel to block blood flow. Skeleton 2011 has memory characteristic and elasticity, can be compressed and accomodate in distal end keeps sleeve 101, can resume former shape immediately after keeping sleeve 101 internal release from the distal end, and tectorial membrane 2012 can laminate with the cooperation of blood vessel inner wall, plays the effect of blocking blood flow and stable structure temporarily, is convenient for aspirate embolus 4.

Example two:

referring to fig. 8 and 12, on the basis of the first embodiment, the thrombus removal device 5 is further included. The thrombectomy device 5 comprises an outer thrombectomy tube 51 passing through the inner channel of the catheter 2 and an inner thrombectomy tube 52 slidably disposed inside the outer thrombectomy tube 51. The thrombus with the diametrically expandable tip structure at one end of the thrombectomy inner tube 52 pushes back the distal end 53. The thrombus-pushing-back distal end 53 is compressibly received inside the thrombectomy outer tube 51. The thrombus pushback distal end 53 is self-expanding. The outer diameter of the thrombus-pushing-back distal end 53 in the expanded state can be adapted to the inner diameter of the blood vessel in which the thrombus-pushing-back distal end 53 is located. Set up and get and tie device 5 and be used for getting the bolt with the cooperation of pipe 2, get and tie outer tube 51 and can pass from pipe 2's intraductal passageway, the thrombus is collected distal end 201 and is located 4 near-end sides of embolism, the thrombus pushes back distal end 53 and is located thrombus distal end side, inject embolism 4 and return to push away distal end 53 and thrombus and collect between the distal end 201 at the thrombus, push back distal end 53 and collect distal end 201 side translation to the thrombus through control thrombus, collect distal end 201 cooperation suction with the thrombus, can take out all embolism 4, avoid 4 fragments of embolism to escape from the inflow blood vessel, cause certain danger along with blood circulation everywhere, improve and get and tie the security, improve and get and tie the success rate, get and tie more thoroughly, avoid remaining.

Referring to fig. 8 and 10, a thrombus capture screen 54 for capturing thrombus is provided on the thrombus extraction inner tube 52 near the thrombus pushing-back distal end 53. The thrombus capture screen 54 has a shape memory characteristic capable of being compressed and received within the thrombectomy outer tube 51. The thrombus snatchs filter screen 54 and is used for catching embolism 4, the thrombus snatchs filter screen 54 and can be accomodate to getting inside embolus outer tube 51 by the compression, during specific operation, get and tie inner tube 52 and pass and snatch filter screen 54 and release to the distal end side of embolus 4 with the thrombus after embolus 4, the pulling thrombus snatchs filter screen 54 and collects distal end 201 side translation to the thrombus, the thrombus snatchs filter screen 54 and catches embolus 4 and promote to the thrombus and collect distal end 201 cooperation suction, push back distal end 53 cooperation with the thrombus and carry out both sides filtration and the embolus 4 snatchs, improve and get the thrombus quality, avoid remaining, avoid embolus 4 to break away from to flow to intravascular.

Referring to fig. 9, the thrombus-pushing-back distal end 53 includes a pushing-back distal end backbone 531 and a pushing-back distal end covering membrane 532. The push-back distal framework 531 is an integrally formed retractable and expandable structure. The push-back distal cover 532 is a covering over the push-back distal skeleton 531. The push-back distal end covering film 532 cooperates with the inner wall of the blood vessel to block the blood flow in the expanded state of the push-back distal end skeleton 531. The pushback distal end framework 531 has memory property and elasticity, can be compressed and stored in the thrombus extraction outer tube 51, can restore the original shape immediately after being released from the thrombus extraction outer tube 51, the pushback distal end coating 532 can be matched and attached with the inner wall of a blood vessel to play a role in temporarily blocking blood flow and stabilizing the structure, so that the thrombus block 4 can be sucked, the sealing performance is improved, the pushback distal end framework can be matched with the thrombus collection distal end 201 to seal the two sides of the thrombus block 4, when the thrombus extraction distal end 53 is opened together with the distal end of the catheter, the blood vessel between the thrombus extraction distal end 53 and the distal end of the catheter is blocked and separated, when the catheter is sucked, the catheter main body 202 and the thrombus collection distal end 201 are kept still, the thrombus extraction distal end 53 and the thrombus capture filter screen 54 are enabled to move horizontally towards the thrombus collection distal end 201 together due to negative pressure generated by suction, the thrombus capture filter screen 54 captures the thrombus block 4 during the moving horizontally, the thrombus capture distal end 53 scrapes the inner wall of the blood vessel, scrape off partial remaining embolus piece 4, and because get and embolus distal end 53 and thrombus collect and to seal relatively between the distal end 201, inside all blood and embolus piece 4 homoenergetic are sucked back to in the pipe together, avoid remaining, avoid some fragment embolus piece 4 because not sucked out and cause certain danger along with the blood circulation, get the effect of tying and get the structure of tying better than the tradition, and get and tie the in-process security better.

Referring to fig. 11, an embolectomy inner tube 52 is provided with an embolectomy inner tube channel for a medical guide wire to pass through. The thrombus taking inner tube channel is arranged to be matched with the medical guide wire, so that the thrombus taking device 5 is convenient to guide, when the thrombus taking device is used, the thrombus block 4 is found through the medical guide wire to get through the channel, then the thrombus taking inner tube channel guides the thrombus taking device 5 to quickly reach the position of the thrombus block 4 along the medical guide wire, the position of the thrombus block 4 is convenient to quickly find, and the operation safety is improved.

Referring to fig. 11, the embolectomy inner tube 52 is formed by spirally winding the entire hose 521. The thrombus taking inner tube 52 is externally provided with a thrombus taking inner tube coating 522 for wrapping the hose 521, the thrombus taking inner tube 52 is arranged to be in a structure of spirally winding the hose, the flexibility and the elasticity of the thrombus taking inner tube 52 can be improved, the thrombus taking inner tube can be adapted to various blood vessel corners conveniently, the injury to blood vessels is less, and the thrombus taking inner tube coating 522 is arranged for sealing the thrombus taking inner tube 52 and preventing blood from entering the inside of the thrombus taking inner tube 52.

Referring to fig. 11, the tube 521 is provided with a plurality of lotion injection ports 5211 which are formed through the thrombectomy tube-covering membrane 522 toward the inner wall of the blood vessel. The tube 521 can be connected to a cleaning device, and a cleaning solution is introduced into the tube 521 and sprayed through the cleaning solution spray port 5211 to the blood vessel inner wall plug 4, thereby assisting the detachment of the plug 4 and washing the small stubborn blood vessel inner wall plug 4. In cooperation with the thrombus removal distal end 53 and the thrombus collection distal end 201, the flushing process is performed at the closed vessel section, so that fragments of the thrombus block 4 and the cleaning fluid are prevented from flowing into the vessel.

Referring to fig. 11, the washing solution ejection port 5211 is obliquely arranged so that the liquid ejected through the washing solution ejection port 5211 is obliquely ejected toward the end away from the thrombus-pushing distal end 53. Lotion jet 5211 slope sets up, avoids the liquid that jets to penetrate the blood vessel inner wall directly and causes the vascular injury, is convenient for collect distal end 201 cooperation with the thrombus, and distal end 201 side injection is collected to the thrombus to liquid orientation, and liquid and the embolus 4 that washes down can directly be collected distal end 201 by the thrombus and take out, avoids embolus 4 to pile up and blocks up the blood vessel.

Referring to fig. 12, the washing liquid injection port 5211 injects the same amount of liquid as the amount of liquid drawn out of the pipe 2 in real time. Stabilize the pressure in the blood vessel and avoid the damage of the blood vessel caused by the support or negative pressure.

Example three:

referring to fig. 13 and 14, in the first embodiment, a guide wire holding sleeve 21 for fixing a guide wire 102 is sleeved on the catheter 2. The wire holding sleeve 21 is provided with a wire groove 211 provided along the wire holding sleeve 21. The guide wire 102 is slidably disposed in the guide wire groove 211. The guide wire groove 211 is arranged to limit the movement of the guide wire 102, and the guide wire 102 slides along the guide wire groove 211, so that the inner wall of a blood vessel is prevented from being cut in the sliding process of the guide wire 102, the guide wire 102 is convenient to pull, and the control is more convenient. The guidewire retention sleeve 21 serves to further stabilize the guidewire 102 from escaping the guidewire 102 from within the guidewire retention sleeve 21 and damaging the blood vessel.

Example four:

referring to fig. 15, in the first embodiment, the guide wire 102 is disposed on the outer wall of the catheter main body 202. An outer wire frame 103 connected with each other is arranged between the guide wires 102. The guide wire outer net rack 103 is arranged to limit the relative position between the guide wire 102 and the guide wire 102, so that the guide wire 102 keeps fit with the outer wall of the catheter main body 202 in the drawing process, and the blood vessel is prevented from being damaged.

The working process of the invention is as follows:

in the operation process of the thrombus removal device, a far-end holding structure 1 is sleeved outside the far end of a catheter and guided to a position close to a thrombus block 4 in a blood vessel 3 through a guide wire 102 or other devices. An auxiliary thrombectomy tool, such as a drug, a thrombectomy stent, or a balloon catheter, may be passed through the catheter interior and delivered to the thrombi 4. After the position is confirmed, the distal holding structure 1 is withdrawn by pulling the guidewire 102 connected to the distal holding sleeve 101, so that the distal holding sleeve 101 is expanded and clings to the blood vessel. Suction is applied through the catheter body 202 using the auxiliary device to fully withdraw the plug 4 into the catheter. After confirming that the plug 4 has fully entered the catheter, the catheter is withdrawn and re-entered into the distal holding structure 1, thereby retrieving the device as a whole. The removal of the plug 4 is effected. The thrombus taking outer tube 51 can pass through a catheter inner channel of the catheter 2, the thrombus collection distal end 201 is located on the proximal side of the thrombus block 4 during specific operation, the thrombus push-back distal end 53 is located on the distal side of the thrombus block 4, the thrombus block 4 is limited between the thrombus push-back distal end 53 and the thrombus collection distal end 201, the thrombus push-back distal end 53 is controlled to translate towards the thrombus collection distal end 201, the thrombus collection distal end 201 is matched with suction, all the thrombus blocks 4 can be taken out, and fragment of the thrombus block 4 is prevented from escaping from an inflow blood vessel.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (10)

1. An embolectomy device comprising a distal holding mechanism (1) and a catheter (2), the end of the catheter (2) distal to an operator being defined as distal and the end proximal to the operator as proximal, characterized in that: the catheter (2) comprises a catheter main body (202) and a thrombus collecting distal end (201) which is arranged at one end of the catheter main body (202) and has a head end structure with an expandable diameter, the thrombus collection distal end (201) is self-expanding or expanded by balloon-assisted expansion, the outer diameter of the expanded state of the thrombus collection distal end (201) can adapt to the inner diameter of a blood vessel where the thrombus collection distal end (201) is positioned, the catheter main body (202) and the thrombus collection distal end (201) are internally provided with communicated catheter inner channels, the distal holding mechanism (1) comprises a distal holding sleeve (101) and a plurality of guide wires (102), the distal holding sleeve (101) is sleeved on the thrombus collecting distal end (201) for receiving or releasing the thrombus collecting distal end (201), one end of the guide wire (102) is fixedly connected with the distal holding sleeve (101) for supporting and pulling back the distal holding sleeve (101).

2. A embolectomy device as defined in claim 1, wherein: the distal holding mechanism (1) and/or the catheter (2) is/are provided with a developing element which can be developed under the radiation.

3. A embolectomy device as defined in claim 1, wherein: the guide wires (102) are connected to the distal holding sleeve (101) in a symmetrical or evenly distributed mode, and the number of the guide wires (102) is 2-6.

4. A embolectomy device as defined in claim 1, wherein: the thrombus collection distal end (201) is in a cylindrical, horn-shaped or bell-shaped shape with one side closed up in an expanded state.

5. A embolectomy device as defined in claim 1, wherein: the thrombus collect distal end (201) including collecting distal end skeleton (2011) and collecting distal end tectorial membrane (2012), collect distal end skeleton (2011) for weave, cutting, around spring, concatenation or integrated into one piece's collapsible expansion structure, collect distal end tectorial membrane (2012) do collect the outer one deck covering of distal end skeleton (2011), collect under distal end skeleton (2011) the expansion state collect distal end tectorial membrane (2012) and cooperate with the vascular inner wall in order to block the blood stream.

6. A embolectomy device as defined in claim 1, wherein: still including getting and tie device (5), it includes and can follow to get and tie device (5) catheter (2) intraductal passage and locate with slidable get and tie inner tube (52) inside getting of getting and tie outer tube (51), get and tie the thrombus that has the expandable head end structure of inner tube (52) one end and push back distal end (53), the thrombus pushes back distal end (53) compressible accomodating to get and tie outer tube (51) inside, the thrombus pushes back distal end (53) and is for expanding the inflation formula or utilizing the supplementary expansion of sacculus, the thrombus pushes back the external diameter that distal end (53) expanded state can adapt to the thrombus pushes back the internal diameter of the blood vessel that distal end (53) located.

7. A embolectomy device as defined in claim 6, wherein: get and tie inner tube (52) and go up to be close to thrombus back and push away distal end (53) department and be equipped with thrombus that is used for catching thrombus and snatch filter screen (54), thrombus is snatched filter screen (54) and has shape memory characteristic and can be compressed and accomodate in getting ties outer tube (51).

8. A embolectomy device as defined in claim 6, wherein: thrombus pushes back distal end (53) including pushing back distal end skeleton (531) and pushing back distal end tectorial membrane (532), push back distal end skeleton (531) for weave, cutting, around spring, concatenation or integrated into one piece's collapsible expansion structure, push back distal end tectorial membrane (532) do push back the outer one deck covering of distal end skeleton (531), push back under distal end skeleton (531) expansion state push back distal end tectorial membrane (532) and the cooperation of blood vessel inner wall in order to block the blood flow.

9. An embolectomy device according to any of claims 1-8, wherein: the cover is equipped with on pipe (2) and is used for fixing seal wire (102) keep sleeve (21), be equipped with on seal wire keep sleeve (21) and follow seal wire groove (211) that seal wire keep sleeve (21) set up, seal wire (102) slidable locate in seal wire groove (211).

10. An embolectomy device according to any of claims 1-8, wherein: the guide wire (102) is arranged on the outer wall of the catheter main body (202), and an outer guide wire rack (103) which is connected with each other is arranged between the guide wire (102) and the guide wire (102).

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