Bone-cement type combination broach screw and composite screwdriverTechnical field
This utility model is related to medical fracture fixation device, is more particularly, to applied to reset between sclerite, pressurizes simultaneouslyThe internal fixation system of strong fixation, and supporting bone cement injecting systems and special composite screwdriver.
Background technology
Treating the fracture that some needs are performed the operation, such as：Articular fracture, Odontoid process etc., need to pass through to add by lag screwThe mode of pressure realizes the strong fixation fractured.The related biomechanical principle of this Therapeutic Method is as follows：Lag screw relies on padBetween piece or blade plate and cortical bone formed axial compression stress, between sclerite formed pressor effect, realize sclerite itBetween strong fixation.During the fixing fracture of application lag screw, compressive stress be can realize fracturing strong fixation key becauseElement；Bone mass is one of key factor of impact compressive stress, when being associated with the skeleton of osteoporosis, due to bone massDecline substantially, usual pulling force screw cannot realize the strong fixation of pressurization fractured.
At present clinically, solve the usual scheme of this problem：It is that AO lag screw combines cement augmentation technology, specificallyAs follows：In the punching of skeleton suitable position, inject a certain amount of bone cement in nail, make bone cement in nail and around holeDisperse in spongy bone, is then implanted into AO lag screw in the appropriate time, pressurizes and fixing fracture.Although this scheme is biologicalMechanical advantage substantially, but is not widely used in clinic, because there are many unfavorable factors：Such as bone cement disperse controls tiredThe difficult, operating time restricted (must before bone cement solidification pedicle screw, and complete the fixing fracture of the pressurization of screw), bone waterMud monomer toxicity, screw such as are not easily taken out at the dispute.This technology also has that AO lag screw is intrinsic, such as simultaneously：AO drawsPower tip of screw soft tissue interference problem etc..
Utility model content
The technical problems to be solved in the utility model is to provide a kind of bone-cement type combination broach screw system, and bone cement is notedPenetrate system and its special composite screwdriver：First, being capable of whole effects that screw combines cement augmentation technology；Second, it is aobviousWrite the consumption reducing bone cement, reduce the risk of bone cement monomer toxicity；Third, avoiding operation time to limit sex chromosome mosaicism；Fourth, realizing the quantitative disperse of bone cement orientation；Fifth, screw is formed with bone interface fixing biology, reducing long-term loosening may；Sixth, being conducive to operating, reducing the learning curve gradient, reducing as far as possible and relying on doctors experience；Seventh, reducing tip of screw soft tissueAnnoyance level；Eighth, screw can partly take out, when tip of screw soft tissue annoyance level weight, need taking-up screw soft to eliminateDuring tissue interference, reduce the difficulty that screw takes out.
For solving above-mentioned technical problem, this utility model provides following technical scheme：
A kind of bone-cement type combination broach screw, including：Described bone-cement type combination broach screw includes assembly A and assemblyB；
Described assembly A includes the first screw thread 2 and the second screw thread 3, and the inside of described assembly A is cavity 1, described first spiral shellThe bone cement disperse hole 4 that several extend through thread outer surface, described cavity 1 and described bone are provided with the intracavity sidewall of stricture of vagina 2Cement disperse hole 4 is connection, and the afterbody of the second screw thread 3 is hollow prism shape structure 5；
Described assembly B is hollow structure inside, and the side of described assembly B is provided with and is connected with assembly A second screw thread (3)3rd screw thread 6, described assembly B opposite side is provided with hemispherical hollow structure 7, and described hemispherical hollow structure 7 end is provided withCross-shaped groove structure 8.Certainly, the Flos Mume groove of similar cross-shaped groove structure or other similar structures being capable of fixation kit B are also and are somebody's turn to doThe structure that technical characteristic phase is equal to, belongs to this patent protection domain.
As a kind of a kind of priority scheme of bone-cement type combination broach screw described in the utility model：Described bone cementDisperse hole 4 is arranged at the side deviating from screw direction of advance of the first screw thread 2 convex shape screw thread.
If because the side setting bone cement disperse hole towards screw direction of advance of the first screw thread 2 convex shape screw thread,For screw pressurization, fixing, skeleton recovery purposes less, the consumption of bone cement can be increased on the contrary.Using this patent scheme, energyEnough more preferably control bone cement disperse directions, improve effect, reduce consumption.
As a kind of a kind of priority scheme of bone-cement type combination broach screw described in the utility model：Described bone cementThe Way out in disperse hole 4 is perpendicular to the axis of described combination broach screw.With advantageously in bone cement disperse effect.
As a kind of a kind of priority scheme of bone-cement type combination broach screw described in the utility model：Described assembly ACavity 1 one end perforate in the second screw thread 3, the other end is located in the shaft core of the first screw thread 2, is closing or runs through screwIt is in communication with the outside；
Described first screw thread 2, the second screw thread 3 and the 3rd screw thread 6 are coaxial threaded, and the pitch of the first screw thread 2 and screw thread are deepDegree is more than the second screw thread 3, the 3rd screw thread 6；Second screw thread 3 is identical with the pitch of the 3rd screw thread 6 and the depth of thread, the second screw thread 3It is mutually matched with the 3rd screw thread 6 to realize the connection of assembly A and assembly B.
As a kind of a kind of priority scheme of bone-cement type combination broach screw described in the utility model：Described first spiral shellIt is provided with the smooth cylindrical stem of hollow 22, described hollow smooth cylindrical stem 22 surface is arranged between stricture of vagina 2 and the second screw thread 3There is the first graduation mark 23；It is provided with non-threaded portion 24 between 3rd screw thread 6 of described assembly B and hemispherical hollow structure 7, describedNon-threaded portion 24 surface is provided with the second graduation mark 25.
As a kind of a kind of priority scheme of bone-cement type combination broach screw described in the utility model：Described assembly BThe end of hemispherical hollow structure 7 be flat.Arc with respect to the hemispherical dome structure end of AO lag screw one end settingFace, bone-cement type combination broach tip of screw incisura is low, and the space of occupancy is little, soft tissue is disturbed little, but its unique textureBottle opener can be increased is in contact with it face again for design, is easy to fix, screws.
A kind of bone cement injecting systems for bone-cement type combination broach screw described in the utility model：Including assembly CWith assembly D；
Described assembly C is hollow cylindrical structure, including the first hollow cylindrical structure 9 and the second hollow cylindrical structure 10, instituteState the first hollow cylindrical structure 9 surface to be provided with the 3rd graduation mark 11 or there is no scale, described first hollow cylindrical structure 9 straightFootpath is more than the diameter of described second hollow cylindrical structure 10, one end of described first hollow cylindrical structure 9 and described second hollowColumn structure 10 connects, and the other end is provided with flat distal end 12；
Described assembly D is column structure, including the first column structure 13 and the second column structure 14, described first cylinder knotStructure 13 is fitted close with described first hollow cylindrical structure 9, and described second column structure 14 is tight with the second hollow cylindrical structure 10Close fit.
A kind of composite screwdriver for bone-cement type combination broach screw described in the utility model：Including in bottle opener E and outerBottle opener F；
Described interior bottle opener E includes the first cylindrical handle 16 and the second cylindrical stem 17, described second cylindrical stem17 ends are prismatic structure 18, the prismatic structure 18 of described interior bottle opener interior hollow arranging with described assembly A the second screw thread 3Prismatic structure 5 is mutually matched；
Described outer bottle opener F is hollow structure, including the 3rd cylindrical handle 19 and the 4th cylindrical stem 20, the described 4thCylindrical stem 20 end is crosswise structure 21, crosswise structure 21 and the described assembly B hemispherical hollow of described outer bottle openerIn structure 7, the cross-shaped groove structure 8 of setting is mutually matched；
The overall diameter of second cylindrical stem 17 of described interior bottle opener E is less than or equal to the hollow structure of described outer bottle opener FInterior diameter, second cylindrical stem 17 of described interior bottle opener cylinder E pass through the hollow structure of described outer bottle opener F realize in riseSub- E and outer bottle opener F combination；The length of described interior bottle opener E the second cylindrical stem 17 is more than the cylindrical stem of described outer bottle opener F20 length；
It is provided with latch-up structure 29 between the interior bottle opener E of described composite screwdriver and outer bottle opener F.
A kind of preferred version as the composite screwdriver for bone-cement type combination broach screw described in the utility model：One end of first cylindrical handle 16 of described interior bottle opener E and the second cylindrical stem 17 connection is provided with hollow cylindrical structure26, when interior bottle opener E and outer bottle opener F combines, the 3rd cylindrical handle 19 part of described outer bottle opener F is located in interior bottle opener EIn hollow-cylindrical structure 26, described 3rd cylindrical handle 19, hollow cylindrical structure 26 and the first cylindrical handle 16 are constitutedThe handle of composite screwdriver.
A kind of preferred version as the composite screwdriver for bone-cement type combination broach screw described in the utility model：First cylindrical handle 16 surface of described interior bottle opener E arranges angled 4th graduation mark 27, the 3rd cylinder of described outer bottle opener FShape handle 19 surface is provided with the 5th angle index line 28.
Following Advantageous Effects are at least had using technical scheme described in the utility model：
First, bone-cement type combination broach screw is implanted in skeleton by special composite screwdriver, and fracture with compressive effect is occurringBefore, special screwdriver is an entirety, no relative motion between inside and outside bottle opener, therefore bone-cement type combination broach screw be one wholeBody, no relative motion between assembly A and assembly B；Now, the prismatic structure 18 of interior bottle opener and assembly A hollow prism shape structure5, outer bottle opener crosswise structure 21 and assembly B cross-shaped groove structure 8, this two groups of structures form special screwdrivers and bone-cement type combination is drawnThe multiple coupling of power screw, compared with AO lag screw and supporting bottle opener, the composite screwdriver of this patent and bone-cement type combineLag screw contacts with each other area greatly, is more beneficial for the control to screw for bottle opener during operation, convenient operation.
2nd, the hemispherical hollow structure 7 of bone-cement type combination broach screw one end setting, its end is level, relativelyIn the arcwall face of the hemispherical dome structure end of AO lag screw one end setting, bone-cement type combination broach tip of screw incisura is low,The space taking is little, soft tissue is disturbed little.
3rd, bone cement injecting systems are passed through bone cement is quantitative fixed through the cylindrical cavity 1 of assembly A, bone cement disperse hole 4To disperse, realize bone cement disperse and the optimization of dosage, reduce bone cement consumption, reduce the risk of bone cement monomer toxicity.
4th, a kind of bone-cement type combination broach screw system and its special screwdriver carry out fracture with compressive fixing during,The first step is that the implantation of bone-cement type combination broach screw, second step are the injections of bone cement and solidification, the 3rd step are bone cementsThe pressurization to fracture for the type combination broach screw, these three steps are steps that carry out successively, independent, and three steps are mutually notInterference, operation no strict time limit, be more beneficial for doctor grasp related medical technical ability, the gentle gradient of learning curve, favorablyIn the formation of standard and the popularization of technology.
5th, during bone-cement type combination broach screw pressurization fixation is fractured and maintained fracture stabilization, bone can be grown intoIn surface-treated assembly B micropore, forming synostosis, thus obtain biology fixing, further increasing bone-to-bone cementThe stability of type combination broach screw interface, reduces the fixing probability loosening in long term.
6th, when screw tail tissue disturbs, need to take out it is only necessary to take out assembly B during screw, and cement augmentationFixing assembly A indwelling, in internal, takes out the difficulty of lag screw when reducing the fixing fracture of lag screw joint bone cement technologyDegree.
Brief description
Fig. 1 is a kind of structural representation of the assembly A of bone-cement type combination broach screw of this utility model one embodimentFigure；
Fig. 2 is the end view that Fig. 1 observes from screw afterbody；
Fig. 3 is a kind of structural representation of the assembly B of bone-cement type combination broach screw of this utility model one embodimentFigure；
Fig. 4 is the end view that Fig. 3 observes from afterbody；
Fig. 5 is that a kind of assembly A of bone-cement type combination broach screw of this utility model one embodiment is combined with assembly BStructural representation；
Fig. 6 is a kind of bone cement injection system for bone-cement type combination broach screw of this utility model one embodimentThe structural representation of the assembly C of system；
Fig. 7 is a kind of bone cement injection system for bone-cement type combination broach screw of this utility model one embodimentThe structural representation of the assembly D of system；
Fig. 8 is a kind of bone cement injection system for bone-cement type combination broach screw of this utility model one embodimentThe structural representation that system assembly C, D combine；
Fig. 9 is in a kind of composite screwdriver for bone-cement type combination broach screw of this utility model one embodimentThe structural representation of bottle opener E；
Figure 10 is a kind of composite screwdriver for bone-cement type combination broach screw of this utility model one embodimentThe structural representation of outer bottle opener F；
Figure 11 is in a kind of composite screwdriver for bone-cement type combination broach screw of this utility model one embodimentThe structural representation that outer bottle opener combines.
Figure 12 is structure when this utility model bone cement injecting systems are used with bone-cement type combination broach screw associationSchematic diagram.
Structural representation when composite screwdriver is used with bone-cement type combination broach screw association in Figure 13 this utility model.
In Figure 14 bone-cement type described in the utility model combination broach screw placement skeleton structural representation.
The assembly B of Figure 15 this utility model bone-cement type combination broach screw is by the structural representation after taking-up from skeletonFigure.
The title of the corresponding component represented by figure numeral：
1. cavity, 2. the first screw thread, 3. the second screw thread, 4. bone cement disperse hole, 5. hollow prism shape structure, 6. the 3rd spiral shellStricture of vagina, 7. hemispherical hollow structure, 8. cross-shaped groove structure, 9. the first hollow cylindrical structure, 10. the second hollow cylindrical structure, 11.Three graduation marks, 12. flat distal end, 13. first column structures, 14. second column structures, 15. flat ends, 16. first cylindersShape handle, 17. second cylindrical stem, 18. prismatic structures, 19. the 3rd cylindrical handle, 20. the 4th cylindrical stem,The crosswise structure of 21. outer bottle openers, the smooth cylindrical stem of 22. hollows, 23. first graduation marks, 24. non-threaded portions, 25. secondGraduation mark, 26. hollow cylindrical structures, 27. the 4th graduation marks, 28. the 5th angle index lines, 29. latch-up structures.Assembly A withAssembly B is bone-cement type combination broach screw, and assembly C and assembly D constitutes bone cement injecting systems, interior bottle opener E and outer bottle opener F structureBecome composite screwdriver, G is bone cement.
Specific embodiment
1 to accompanying drawing 15 is injected to bone-cement type combination broach screw described in the utility model, bone cement below in conjunction with the accompanying drawingsSystem and composite screwdriver are described in further detail.
As Figure 1-Figure 5, this utility model discloses a kind of bone-cement type combination broach screw, including assembly A and assemblyB.
Fig. 6-Fig. 8 is a kind of bone cement injecting systems assembly for bone-cement type combination broach screw of this utility modelC, assembly D schematic diagram, and the structural representation combining.
Fig. 9-Figure 11 is a kind of being combined for bone-cement type combination broach screw of this utility model one embodimentThe structural representation of the interior bottle opener E of son；The structural representation of outer bottle opener F；The structural representation that inside and outside composite screwdriver, bottle opener combines.
Figure 12 is structure when this utility model bone cement injecting systems are used with bone-cement type combination broach screw associationSchematic diagram；Structural representation when composite screwdriver is used with bone-cement type combination broach screw association in Figure 13 this utility model；In Figure 14 bone-cement type described in the utility model combination broach screw placement skeleton structural representation；Figure 15 this utility modelThe assembly B of bone-cement type combination broach screw is by the structural representation after taking-up from skeleton.
As shown in figure 1, assembly A includes the first screw thread 2 and the second screw thread 3.The inside of assembly A is cavity 1.First screw threadThe bone cement disperse hole 4 that several extend through thread outer surface is provided with 2 intracavity sidewall.Cavity 1 and bone cement disperse hole 4It is connection.The afterbody of the second screw thread 3 is hollow prism shape structure 5.Assembly B is hollow structure inside.The side setting of assembly BThere is the 3rd screw thread 6 being connected with assembly A the second screw thread 3, assembly B opposite side is provided with hemispherical hollow structure 7.Hemispherical hollowStructure 7 includes cross-shaped groove structure 8.Described cross-shaped groove structure 8 can also be other similar structures such as Flos Mume groove.
In the present embodiment, what bone cement disperse hole 4 was arranged at the first screw thread 2 convex shape screw thread deviates from screw advance sideTo side.Contribute to realizing the pressurization to screw and fixation by less bone cement.The Way out in bone cement disperse hole 4Perpendicular to the axis of combination broach screw, be conducive to the disperse of bone cement, somewhat have some angles of inclination to fall within equivalent structure.One end perforate of the cavity 1 of assembly A is located in the shaft core of the first screw thread 2 in the second screw thread 3, the other end, is to close or pass throughWear what screw was in communication with the outside；First screw thread 2, the second screw thread 3 and the 3rd screw thread 6 are coaxial threaded, the pitch of the first screw thread 2 andThe depth of thread is more than the second screw thread 3, the 3rd screw thread 6；Second screw thread 3 is identical with the pitch of the 3rd screw thread 6 and the depth of thread, and secondScrew thread 3 and the 3rd screw thread 6 are mutually matched to realize the connection of assembly A and assembly B.Arrange between first screw thread 2 and the second screw thread 3There is the smooth cylindrical stem of hollow 22, the smooth cylindrical stem of hollow 22 surface is provided with the first graduation mark 23；The 3rd of assembly BIt is provided with non-threaded portion 24, non-threaded portion 24 surface is provided with the second graduation mark 25 between screw thread 6 and hemispherical hollow structure 7.
Described bone cement disperse hole 4 and cavity 1 constitute bone cement transfer structure, and bone cement is through cavity 1, bone cement disperse hole4 disperses in the first screw thread 2 around, may refer to accompanying drawing 14-15.Second screw thread 3 is mutually matched with the 3rd screw thread 6 and is connected, realThe connection of existing assembly A and assembly B, the second screw thread 3 end arranges hollow prism shape structure 5, with interior bottle opener end prismatic structure18 are mutually matched, the control to assembly A for the bottle opener in realization.
The outer surface of assembly B can be smooth or be provided with sandblasting, porous and hydroxyapatite coating layer and other rushEnter the micropore of Bone Ingrowth material process formation.Second screw thread 3 and the 3rd screw thread 6 are mutually matched the company realizing assembly A and assembly BConnect；The hemispherical hollow structure 7 that the assembly B other end is provided with terminal horizontal includes cross-shaped groove structure 8.Bone-cement type combination broachThe hemispherical hollow structure 7 of screw one end setting, its end is level, with respect to the hemispherical of AO lag screw one end settingThe arcwall face of structure end, bone-cement type combination broach tip of screw incisura is low, and the space of occupancy is little, soft tissue is disturbed little.
As shown in fig. 6, assembly C is hollow circuit cylinder spline structure, by the first hollow cylindrical structure 9 and the second hollow cylindrical structure10 compositions, the first hollow circuit cylinder spline structure 9 surface is provided with the 3rd graduation mark 11, and one end is provided with flat distal end 12, the other endIt is connected with the second hollow cylindrical structure 10.
As shown in fig. 7, assembly D is cylinder spline structure, it is made up of the first column structure 13 and the second column structure 14.
As shown in figure 9, interior bottle opener E is made up of the first cylindrical handle 16 and the second cylindrical stem 17, first is cylindricalOne end of handle 16 and the second cylindrical stem 17 connection is provided with hollow cylindrical structure 26；First cylindrical handle 16 surface4th graduation mark 27 is set, and the second cylindrical stem 17 end is prismatic structure 18, the hollow of prismatic structure 18 and assembly APrismatic structure 5 is mutually matched, to realize the control to assembly A for the interior bottle opener.Described interior bottle opener can be hollow, in order to gramFamily name's pin passes through it is also possible to not be hollow.
As shown in Figure 10, outer bottle opener F is hollow structure, by the 3rd cylindrical handle 19 and the 4th cylindrical stem 20 structureBecome, the 3rd cylindrical handle 19 surface is provided with the 5th angle index line 28, and the 4th cylindrical stem 20 is provided with latch-up structure29, end is crosswise structure 21.Latch-up structure 29 acts on interior bottle opener the second cylindrical stem 17, and now interior bottle opener rises with outerSub- mutually locking, constitutes an entirety；Crosswise structure 21 is mutual with the cross-shaped groove structure 8 of setting in assembly B hemispherical dome structureCoupling, to realize the control to assembly B for the outer bottle opener F.
Technical scheme described in this utility model goes for multiple fractures, particularly with difficulties such as osteoporosisesIn the case of fractures there is more preferable effect.Lower mask body combines relevant this utility model institute in fracture of the tibial plateau operationState the use process of device, be described in detail：
The first step：By standard procedures flow process, sterilization paving is single and exposes fracture by standard procedures approach, resets and utilizes kirschnerPin fixing fracture temporarily, perspective confirms that the reduction of the fracture is good；Turned with electro-medical and punch and measure nail depth through Kirschner wire, according toThe nail depth recording；Select appropriate length bone-cement type combination broach screw, and assemble so that the end of assembly B andAssembly A the first graduation mark 23 is concordant.It is of course also possible to according to different fracture situation, determine the initial assembling between assembly A, BPosition.
Second step：Interior bottle opener the second cylindrical stem 17 passes through outer bottle opener hollow structure, locks latch-up structure 29, now interiorBottle opener and outer bottle opener one entirety of composition are so that the prismatic structure 18 hollow prism shape that arrange interior with assembly A the second screw thread 3 is tiedStructure 5 is mutually matched, to realize the control to assembly A for the interior bottle opener, crosswise structure 21 and ten of setting in assembly B hemispherical dome structureWord slot structure 8 is mutually matched, and to realize the control to assembly B for the outer bottle opener, now, tightens bottle opener and outer bottle opener in latch-up structure 29Constitute the entirety of a locking.
3rd step：Bone-cement type combination broach screw is screwed into by skeleton by the composite screwdriver having locked, until assembly BHigh scale is concordant with bone face, the step for key be：(1) operator hold simultaneously composite screwdriver the 3rd cylindrical handle 19,Hollow cylindrical structure 26 and the first cylindrical handle 16, it is to avoid individually hold the 3rd cylindrical handle 19 or first cylindricalHandle 16, to avoid because improper operation leads to there is relative motion between inside and outside bottle opener；(2) the semicircle hollow of assembly BStructure 7 is near bone face but contactless with bone face.
4th step：Remove composite screwdriver, assembly C and assembly D is mutually matched, constitute bone cement injecting systems, and according toThe concrete state of an illness extracts the bone cement of suitable dose.
5th step：By assembly C the second hollow cylindrical structure 10 through the cylindrical cavity 1 of assembly B hollow structure plug-in package AIn, bone cement is injected, bone cement is through cylindrical cavity 1, bone cement disperse hole 4 disperse in the first screw thread 2 surrounding cancellous boneInterior.
6th step：According to the state of an illness and bone cement consumption, by bone cement injecting systems from bone-cement type after wait right timesTake out in combination broach screw, need rotary components C for a period of time at this, assembly C and assembly A is connected into one by prevention bone cementIndividual entirety.
7th step：After waiting right times, bone cement solidifies completely, and now, assembly A is effectively fixed on skeleton by bone cementInterior, unclamp latch-up structure 29, handss fix interior bottle opener E, another handss rotate the handle of outer bottle opener F, by outer bottle openerIn crosswise structure 21 and assembly B hemispherical dome structure, the cross-shaped groove structure 8 of setting is mutually matched, and rotary components B is so that assembly BMove to assembly A along screw axis, and assembly A now remains stationary as.Assembly B constantly advance under the drive of outer bottle opener so thatThe continuous cripetura of bone-cement type combination broach screw bar portion, thus realize pressurization between sclerite further.
8th step：According to operation needs, by identical flow process suitable position continue to be screwed into this device and otherInside-fixture, until it reaches expected therapeutic effect.
9th step：Perspective confirms that the reduction of the fracture and interior fixed position are good again, after rinsing wound surface and definitely stopping blooding successivelyIt is seamed to skin.
According to the different state of an illness, the relative dimensions in operation can constantly adjust.
In rehabilitation course, according to the different state of an illness, when tip of screw soft tissue annoyance level is serious, need to take out screw withWhen eliminating soft tissue interference, in operation, the use process about device described in the utility model is as follows：
The first step：By standard procedures flow process, sterilization paving is single and exposes bone-cement type combination broach spiral shell by standard procedures approachNail afterbody.
Second step：Mutual with the cross-shaped groove structure 8 of setting in assembly B hemispherical dome structure by outer bottle opener crosswise structure 21Coupling, rotates and takes out assembly B, now assembly A indwelling, in bones, does not have soft tissue interference problem.Or use itHis bottle opener is good.
3rd step：According to operation needs, other bone-cement types combination broach screw assembly B portion is taken out by identical flow processPoint.
4th step：Rinse wound surface and be seamed to skin successively after definitely stopping blooding.
It should be noted that above example is only in order to illustrate the technical solution of the utility model and unrestricted, although referencePreferred embodiment has been described in detail to this utility model, it will be understood by those within the art that, can be to this realityModified or equivalent with new technical scheme, without deviating from the spirit and scope of technical solutions of the utility model,It all should be covered in the middle of right of the present utility model.