Invention content
In view of the above-mentioned state of the art, the purpose of this utility model is to provide a kind of importing sheath for embolization devicePipe reduces resistance during push, improves smoothness when embolization device imports microtubular, while importing the intensity of sheathAlso corresponding to increase, improve positioning accuracy and controllability when therapeutic device push.
In order to solve the above technical problems, the utility model provides a kind of importing sheath for embolism device, including：FirstTube body, first tube body include outer tube and inner sleeve, and the inner sleeve is polytetrafluoroethylene material, further includes the second pipeBody, second tube body includes first end and second end, and first tube body includes third end and the 4th end；Wherein, describedTwo ends are correspondingly connected with the third end, the outer diameter at the 4th end and the outer diameter of the second end, the outer diameter at the third endAll same；The outer diameter of the first end is less than the outer diameter of the second end；The internal diameter of the first end is interior with the second endThe internal diameter all same of diameter, the inner sleeve.
Further, the outer tube of first tube body and second tube body are integrally formed.
Further, label pipe is nested on the outer wall of the outer tube.
Further, the 4th end of first tube body is connected with horn-like interface.
Further, the inner sleeve is pressed with the outer tube heat seal.
Further, second tube length is 0.5-3cm, and cone angle is 5-30 °.
Further, the material of the outer tube of first tube body and second tube body is nylon, Pebax, poly- secondAlkene, polypropylene etc. are any.
Second aspect, the invention also discloses blood flow guider, including webmaster holder, conveyer and as described aboveImporting sheath, be set with the webmaster holder in the conveying device, and be installed on the inner cavity for importing sheath.
Further, the conveyer includes push seal wire, and the left end of the push seal wire is connected with guide spring, describedThe first development code quarter, friction sleeve and the second development code is set on push seal wire successively from left to right to carve.
The third aspect, the invention also discloses a kind of Coil embolization device, including push seal wire, implantation spring ring andIt is as described above to import sheath, wherein being set with development code on the push seal wire carves and locks pipe, the implantation spring connectionIt is fixedly installed in the importing sheath on the push seal wire and by the locking pipe.
In the importing sheath provided by the utility model for embolization device, using the taper of no polytetrafluoroethyllining liningSecond tube body reduces whole with the first tube body with polytetrafluoroethyllining lining by the excellent properties of polytetrafluoroethylene (PTFE) itselfA embolization device is importing the push resistance reduction in sheath, improves positioning accuracy and controllability when therapeutic device push；Simultaneously because first tube body for importing sheath is double-layer structure, compared to the importing sheath of other same size, originallyImporting sheath hardness provided in utility model can significantly improve, and be easier when operation to control, will smoothly be led convenient for doctorEnter sheath and is inserted into microtubular tube socket bottom.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that describedEmbodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originallyThe every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicalityNovel protected range.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicularDirectly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is onlyThe utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specificOrientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " theOne ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacifiedDress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrallyConnection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete conditionThe concrete meaning of language in the present invention.
Referring to FIG. 1, its importing sheath structural schematic diagram for the embolization device of the utility model embodiment.Such as Fig. 1 institutesShow, in the embodiment of the present application, the importing sheath includes：First tube body 2, first tube body include outer tube 3 and inner sleevePipe 4, the inner sleeve are polytetrafluoroethylene material, further include the second tube body 1, second tube body includes first end 5 and secondEnd 6, first tube body includes third end 7 and the 4th end 8；Wherein, the second end is correspondingly connected with the third end, describedThe outer diameter at the 4th end and the outer diameter of the second end, the outer diameter all same at the third end；The outer diameter of the first end is less than instituteState the outer diameter of second end；The internal diameter of the first end and the internal diameter of the second end, the internal diameter all same of the inner sleeve.Poly- fourVinyl fluoride is commonly referred to as " non-sticking lining " or " material easy to clean ", and this material has antiacid alkali resistant, resists various organic solventsFeature is practically insoluble in all solvents；Meanwhile polytetrafluoroethylene (PTFE) has the characteristics that heat safe, its friction coefficient is extremely low, instituteAfter it can make lubricating action, also become the first choice of ultra-thin sheath inner layer material.As a result, by by heat seal method and instituteThe excellent properties for stating the polytetrafluoroethylene (PTFE) itself that outer tube is assemblied together reduce entire embolization device and are importing in sheathResistance is pushed, positioning accuracy and controllability when therapeutic device push are improved；Simultaneously because described import described the of sheathOne tube body is double-layer structure, and compared to the importing sheath of other same size, the importing sheath provided in the utility model is hardDegree can significantly improve, and be easier when operation to control, and sheath will be smoothly imported convenient for doctor and is inserted into microtubular tube socket bottom.
As shown in Figure 1, shown second tube body is in the pipe thickness for boring bottom and the first tube body phase for being lined with polytetrafluoroethylene (PTFE)Together, i.e., described first tube body is in step-like in junction with second tube body, to balance the polytetrafluoroethylene (PTFE) inner sleeveThickness, i.e., the described sheath that imports have whole consistent inner cavity；, in this way, the embolization device can be smoothed in importing sheathIt crosses.In actual use, the inner cavity internal diameter is mostly 0.015-0.030 inches, outer diameter 0.6-1.5mm, the polytetrafluoroethyl-neThe thickness of alkene inner sleeve is 0.0005-0.0020 inches, and the entire length for importing sheath is 500-1300mm.
As shown in Figure 1, the tapered design of the second tube body for importing sheath, pipe range 5-30mm, cone angle are 5-30 °.In actual application, it will usually according to aneurysm and parent artery angulation and aneurysm cavity center to parent artery sideMicrotubular tube socket is moulded into different shape by the distance of wall, and the design for importing the second tube body taper of sheath reduces importing sheathPipe is inserted into the resistance of microtubular tube socket bottom, is conducive to it and is inserted into the conical lower portion of microtubular tube socket to greatest extent.Into oneStep, the 4th end of first tube body is connected with horn-like interface, and importing sheath can be smoothly loaded into convenient for conveying deviceWhile interior, the contact area between the 4th end of sheath and the parts of its outer surface cooperation is also increased.
As shown in Figure 1, being nested with label pipe 9 on the outer wall of the outer tube, the length of the label pipe is 1-3cm；The label pipe selects the color different from first tube body to be distinguished to show simultaneously, such as when the first tube body is water white transparency,The label pipe uses black or other to be clearly distinguishable from the color of first tube body, and in practical applications, the label is managedOptional pet material is made.The use of the label pipe can prompt the importing sheath to be inserted into tube socketThe setting of state afterwards, black or other colors can distinguish the label pipe and first tube body, quick convenient for userRead insert state.
As shown in Figure 1, in order to produce facility, the outer tube is integrally formed with second tube body, first pipeBody and second tube body are made by nylon, Pebax, polyethylene, polypropylene etc. are any, above-mentioned material have soft, toughness is big,The advantages that friction coefficient is low and good biocompatibility, is widely used in easy-to-use catheter arts, while Pebax materials haveA variety of hardness washabilitys, in order to ensure to import the integral strength of sheath, the hardness of the first tube body and second tube body is set asShore hardness 50-80D；Pebax has stronger tolerance to various chemical substances simultaneously, is not easy rotten by salt or sulfuric acidErosion.
Fig. 2 is a kind of schematic diagram for the blood flow guider being mounted with blood flow guider, as shown in Fig. 2, including netPipe holder 15, conveyer and sheath is imported as described above, the conveyer is set with the webmaster holder, and is installed on described leadEnter the inner cavity of sheath, the conveyer includes push seal wire 12, and the left end of the push seal wire is connected with guide spring 21, describedIt is set with the first development code on push seal wire successively from left to right and carves 16, friction sleeve 14 and second development code quarter 13.Import sheathThe first tube body use nylon material, resin hardness 80D；The overall length for importing sheath is 600mm, outer diameter 1.3mm, and internal diameter is0.027 inch；PTFE thickness of inner lining is 0.0010 inch；Third end 30mm of the push label pipe apart from first tube body, markNote length of tube is 10mm.It imports in sheath and is connected in horn-like interface 17, facilitate conveyer and be smoothly loaded into importing sheathIt is interior.Operation consent is arranged webmaster holder 15, and the horn mouth 17 by importing sheath between the double-developing code of the conveyer is carvedBe inserted into import sheath in, wherein the webmaster holder with the friction sleeve by frictionally securing.When operation, completion will be loadedThe importing sheath by intervene mouth be pushed into arteries it is aneurysmal nearby, push seal wire is then pushed, according to described pairThe positioning that the code that develops is carved, the blood flow guider is transported at aneurysm, forms a fan " gate ".For the pusherIn the smooth of push process, usually also protection ball cap 11 is equipped in the other end of the guide spring.The webmaster holder is dynamic" gate " formed at arteries and veins tumor directly prevents blood from flowing into aneurysm knurl, once blood is cut off in knurl, thrombus meetingIt is gradually formed in knurl, while endo cell can be grown on holder grid, to rebuild normal blood vessel.
Fig. 3 is a kind of importing sheath structural schematic diagram being mounted with embolism spring ring, as shown in figure 3, including push seal wire20, it is implanted into spring ring 18 and imports sheath as described above, wherein being set with development code on the push seal wire carves 22 and lockingPipe 19, the implantation spring are connected on the push seal wire and are fixedly installed in the importing sheath by the locking pipeIt is interior.The proximal end for importing sheath is in straight, and import sheath proximal end prevents embolism spring ring from importing sheath using mating locking pipeInterior generation position movement；It imports the first tube body of sheath and uses polypropylene material, resin hardness 75D；Import sheath overall length be1100mm, outer diameter 0.85mm, internal diameter are 0.020 inch；PTFE thickness of inner lining is 0.0008 inch；Push label pipe away fromFrom the first tube body tip 40mm, label length of tube is 20mm.After embolism spring ring is loaded into importing sheath, implantation spring distal endApart from the importing sheath first end 20mm, first the locking pipe for importing the 4th end of sheath is removed using preceding, then by instituteIt states and imports the bottom that sheath is inserted into microtubular tube socket, the spring ring smoothly can be pushed into micro- lead by the fixed importing sheathAt tube chamber internal aneurysm position.In order to which the pusher is in the smooth of push process, usually also in the another of the guide springEnd is equipped with protection ball cap 11.After being passed through direct current, the implantation spring ring attraction being connected with the push seal wire is negatively chargedBlood constituent (red blood cell, leucocyte, blood platelet etc.) occur coagulation, thrombus, while the implantation bullet are formed in aneurysmWith the push seal wire connected component because being electrolysed de- disconnection, spring ring is freed to be stayed in aneurysm spring coil.
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solutions of the utility model, the technology of the artPersonnel embody the principles of the present invention to some variations that some of which part may be made, and belong to the utility modelProtection domain within.