Summary of the invention
It is an object of the present invention to solve the above problems, the present invention is devised, for thrombectomy device in the prior artDeficiency simplifies structure, and the lower size limit for enabling this structure to design is lower, by way of blocking blood vessel, avoids breaking in blood vesselBroken thrombus reenters blood circulation, reduces the probability that broken thrombus blocks blood vessel again.
The technical solution adopted by the present invention to solve the technical problems is:
The present invention discloses a kind of thrombus dredge for medical operating, including housing inner casing tube and logical liquid channel, inner sleeveIt is coaxially arranged in outer tube and can be along its axial stretching and inner sleeve can be stretched out from housing tube head to puncture thrombus；In housingThe outside of tube head is equipped with flexible seal cover and support frame, and support frame is located in flexible seal cover and struts for radial direction flexible closeSealing cover；The first sealing is equipped between internal and external casing, outer tube is equipped with the pressure control hole of connection flexible seal cover；It uses in logical liquid channelIn siphoning away thrombus, and the pressure in flexible seal cover can be adjusted by pressure control hole for the logical liquid channel so that flexible seal cover is radially receivedContracting.
In the design, structure is simple, and the flexible of flexible seal cover can not only be controlled by efficiently using logical liquid channel, simultaneously alsoBroken thrombus can be extracted out, realize the diversification application of same structure, and then simplify the design structure of thrombus dredge, it is realThe now miniaturization of the structure, can reduce the lower size limit of the structure, to be conducive to carry out blood in smaller size of blood vesselBolt is removed.In addition, the structure utilizes the design of support frame, flexible seal cover can be made normally to strut under normal pressure, and negative pressure is madeWith lower contraction.It is convenient to the sealing of blood vessel.
Further, support frame as described above includes several chapelet framves, and several chapelet framves are distributed in the surrounding of housing tube headAnd it can be along the radial expansion of outer tube.The two sides of the support frame are separately connected outer tube and flexible seal cover, to effectively limitThe expanded size of flexible seal cover processed.Flexible seal cover is avoided to expand the excessive damage to blood vessel.
Further, respectively support subrack is respectively provided with four armed levers, and four armed levers form parallelogram structure, alternate armIt is hinged between bar；Torsion spring is arranged in wherein at least one hinged place, and torsion spring is for pushing support subrack along housingCaliber is to stretching out.Due to supporting subrack parallelogram structure in the structure, flexible seal cover and contacts blood are effectively increasedArea, the damage for avoiding local pressure excessive to blood vessel side wall.
Further, the mesh grid of sliding sleeve and tubulose is cased on the head of inner sleeve, front end and the inner sleeve of mesh grid are fixedConnection, rear end connect sliding sleeve, and sliding sleeve is equipped with the second sealing, adjust the pressure controllable sliding sleeve in logical liquid channel along inner sleeveAxial movement so that mesh grid radial expansion.The structure can be such that mesh increases using mesh grid in radial expansion process,So as to be embedded into thrombus, it is convenient to thrombus to be crushed, to dredge thrombus.
Further, leading to liquid channel includes outer logical liquid channel and Nei Tong liquid channel, and the outer logical liquid channel is located at internal and external casingBetween, the interior logical liquid channel is located in inner sleeve, and flushing hole is equipped on the inner sleeve on the inside of mesh grid；Flushing hole is led to interiorLiquid channel is connected to and is used to rinse mesh grid；The pressure controllable sliding sleeve in outer logical liquid channel is adjusted along the axial movement of inner sleeveSo that mesh grid radial expansion.By the way that inside and outside two channels are arranged in the structure, part-blood can be siphoned away using interior logical liquid channelBolt fragment, additionally it is possible to mesh grid be controlled using outer logical liquid channel, improve the clear effect of thrombus.
Further, it is additionally provided with puncturing head on the head of inner sleeve, puncturing head is equipped with the first sealing, on the inside of outer tubeEquipped with groove；When second sealing is placed in groove, the first both seals are between internal and external casing；It is logical to adjust inside and outside logical liquidThe flushable mesh grid of the pressure in road.The design that groove is utilized in the structure, makes to be connected between internal and external channel, thus in effective useWater flow between outer logical liquid channel rinses mesh grid, realizes the reciprocal utilization of mesh grid, can be improved the continuity of thrombus removing,Avoid influence of the adhesion thrombus fragment to its dredging vascellum process in mesh grid.
Further, the blood vessel encapsulating method of the above-mentioned thrombus dredge for medical operating, comprising the following steps:
Step 1: control inner sleeve makes both seals between internal and external casing and logical liquid channel is logical along the axial stretching of outer tubePressure control hole is crossed to be connected to the space in flexible seal cover；
Step 2: to being depressured in logical liquid channel, and collapsing flexible seal cover along the radial direction of outer tube；
Step 3: internal and external casing synchronizing moving reaches the head of outer tube at endovascular thrombus；
Step 4: to boosting in logical liquid channel, support frame pushes flexible seal cover to radially expand and be bonded the inside of blood vesselWall makes flexible seal cover seal blood vessels.
It by the pressure relative to atmospheric pressure in logical liquid channel is first generally -0.5kpa, flexibility is close in above step 2Outer diameter after sealing cover radial direction gathering is generally the 1/2-2/3 of blood vessel to be unclogged, and internal and external casing rear end is generally connected with flexible pipe, willIt extend on front side of thrombus at 2-3mm, then stretches out the inner sleeve to be crushed thrombus.
Further, the method for the mesh grid dredging vascellum of the above-mentioned thrombus dredge for medical operating, including following stepIt is rapid:
Step 1: control inner sleeve makes that mesh grid is protruded into the middle part of thrombus and the second sealing does not surpass along the axially extended of outer tubeOuter tube out；
Step 2: the pressure in the outer logical liquid channel of control is back and forth gone up and down, so that sliding sleeve moves back and forth, and then yearns for mesh grid diameterMultiple flexible and broken thrombus；
Step 3: controlling inner sleeve again along the axially extended of outer tube, stretch out the second sealing outside outer tube, reduce logical liquidThe thrombus that pressure and suction in channel are crushed.
In this method, it is flexible or be sucked out broken the control mesh grid of logical liquid channel can be utilized respectively two different stagesBroken thrombus, and then the compatibility of unified structure is improved, under the premise of guaranteeing thrombus cleaning function, effectively simplify structure.
Further, the purging method of the mesh grid of the above-mentioned thrombus dredge for medical operating, comprising the following steps:
Step 1: control inner sleeve makes that mesh grid is protruded into the middle part of thrombus and the second sealing does not surpass along the axially extended of outer tubeOuter tube out；
Step 2: the pressure in the outer logical liquid channel of control is back and forth gone up and down, so that sliding sleeve moves back and forth, and then yearns for mesh grid diameterMultiple flexible, thrombus is crushed and is doped into mesh grid；
Step 3: liquid is discharged in logical liquid channel in control, and controls outer logical liquid channel and suck liquid；Liquid is discharged in interior logical liquid channelSpeed it is identical as the outer logical liquid channel sucking speed of liquid, to rinse mesh grid.
In this method, since mesh grid can be rinsed, so that mesh grid is avoided to block the influence dredged to thrombus, in addition,This method can enable the duplicate removing thrombus of mesh grid, improve the cleaning amount of thrombus.
Further, the application method of the above-mentioned thrombus dredge for medical operating, comprising the following steps:
Step 1: control inner sleeve makes the first both seals between internal and external casing along the axial stretching of outer tube, and makes interiorLogical liquid channel and/or outside logical liquid channel pass through pressure control hole and are connected to the space in flexible seal cover；
Step 2: control flexible seal cover in decompression make along outer tube radial direction collapse, internal and external casing is synchronized go deep into it is intravascular simultaneouslyIt extends at thrombus；
Step 3: boosting in control flexible seal cover, support frame push flexible seal cover to radially expand and be bonded the inner sidewall of blood vesselSeal blood vessel at this；
Step 4: control inner sleeve makes that mesh grid is protruded into the middle part of thrombus and the second sealing does not surpass along the axially extended of outer tubeOuter tube out；
Step 5: the pressure in the outer logical liquid channel of control is back and forth gone up and down, so that sliding sleeve moves back and forth, and then yearns for mesh grid diameterIt is multiple to stretch and adhere to thrombus；
Step 6: control inner sleeve is taken in along the axial direction of outer tube, make the first both seals between internal and external casing, it is second closeEnvelope portion reaches groove, is connected to interior logical liquid channel with outer logical liquid channel by flushing hole and mesh grid, and it is logical to control inside and outside logical liquidLiquid between road is flowed to rinse the thrombus being adhered in mesh grid；.
Step 7: step 4-6 is repeated, until endovascular thrombus is dredged；
Step 8: controlling inner sleeve again along the axial stretching of outer tube, make the first both seals between internal and external casing, togetherWhen interior logical liquid channel and/or logical liquid channel is connected to by pressure control hole with the space in flexible seal cover outside；
Step 9: the interior decompression of control flexible seal cover, flexible seal cover radially collapse, by internal and external casing along the synchronous extraction of blood vessel.
Intravascular Thrombus is cleared up using above method, blood vessel can not only be blocked, blood flow is avoided to make to be crushedThrombus afterwards, which is pulled away, reduces the secondary probability for blocking other blood vessels of broken thrombus, additionally it is possible to by the mesh grid of reciprocating motion,Thrombus is removed, additionally it is possible to effectively rinse mesh grid using the design in inside and outside logical liquid channel.
The invention has the benefit that
1, present apparatus structure is simple, and the flexible of flexible seal cover can not only be controlled by efficiently using logical liquid channel, while can alsoIt extracts broken thrombus out, realizes the diversification application of same structure, and then simplify the design structure of thrombus dredge, realizing shouldThe miniaturization of structure, can reduce the lower size limit of the structure, so that it is clear to be conducive to the progress thrombus in smaller size of blood vesselIt removes；
2, the area of flexible seal cover and contacts blood is effectively increased due to support frame parallelogram structure in the structure,The damage for avoiding local pressure excessive to blood vessel side wall；
3, can make to be connected between internal and external channel in the structure, so that the water flow between the inside and outside logical liquid channel of effective use is rinsed and compiledThe reciprocal utilization of mesh grid is realized in knitmesh, be can be improved the continuity of thrombus removing, is avoided adhesion thrombus fragment pair in mesh gridThe influence of its dredging vascellum process.
Embodiment 4
Based on the thrombus dredge structure in embodiment 2, application method, comprising the following steps:
Step 1: control inner sleeve 6 is sealed in the first sealing 13 between internal and external casing along the axial stretching of outer tube 4, andInterior logical liquid channel 10 and/or outside logical liquid channel 8 pass through pressure control hole 3 and are connected to the space in flexible seal cover；
Step 2: control flexible seal cover in decompression make along outer tube 4 radial direction collapse, internal and external casing is synchronized go deep into it is intravascularAnd it extends at thrombus；
Step 3: boosting in control flexible seal cover, support frame 2 push flexible seal cover to radially expand and be bonded the inside of blood vesselWall seals blood vessel at this；
Step 4: control inner sleeve 6 makes mesh grid protrude into thrombus middle part and the second sealing 7 along the axially extended of outer tube 4Without departing from outer tube 4；
Step 5: the pressure in the outer logical liquid channel of control is back and forth gone up and down, so that sliding sleeve 9 moves back and forth, and then yearns for mesh grid diameterIt is multiple to stretch and adhere to thrombus；
Step 6: control inner sleeve 6 along the axial direction income of outer tube 4, make the sealing of the first sealing 13 between internal and external casing, theTwo sealings 7 reach at groove 5, are connected to interior logical liquid channel 10 with outer logical liquid channel 8 by flushing hole 12 and mesh grid 11, controlLiquid between the inside and outside logical liquid channel of system is flowed to rinse the thrombus being adhered in mesh grid；.
Step 7: step 4-6 is repeated, until endovascular thrombus is dredged；
Step 8: again control inner sleeve 6 along outer tube 4 axial stretching, make the first sealing 13 be sealed in internal and external casing itBetween, while interior logical liquid channel 10 and/or outer logical liquid channel 8 are connected to by pressure control hole 3 with the space in flexible seal cover；
Step 9: the interior decompression of control flexible seal cover, flexible seal cover radially collapse, by internal and external casing along the synchronous extraction of blood vessel.
Above-described embodiment does not limit the embodiments just for the sake of clearly illustrating done citing.ForFor those skilled in the art, other different forms of changes or modifications may be made based on the above description.There is no necessity and possibility to exhaust all the enbodiments.And obvious changes or variations extended from this are stillIn protection scope of the present invention.