Bone cement injectorTechnical field
The utility model belongs to technical field of medical instruments, more particularly to a kind of bone cement injector.
Background technology
Bone cement (i.e. bone cement) is a kind of medical material for bone surgery, due to its part physical property withAnd outward appearance and character quite as white cement for building, there has been so popular title after solidification.Bone cement generally by powder andLiquid two parts preparation forms, in use, to be first well mixed according to certain ratio, then using bone cement injector by itsIt is expelled to skeleton position.The mixing and stirring of usual bone cement are carried out in other containers, are reinjected after the completion of mixingBone cement injector, bone cement injector can not be directly realized by the well mixed purpose of material, add operation sequence, and operation is multipleMiscellaneous, the equipment being used cooperatively is more.
Utility model content
The defects of can not realizing material well mixed purpose for bone cement injector existing for solution prior art, this realityWith a kind of bone cement injector of new offer.
In order to solve the above technical problems, technical scheme is used by the utility model reality：A kind of bone cement injector,Including injector body and the intrinsic piston push rod of the injector is arranged on, described injector body one end has and injectionThe injection nozzle of the cavity connection of device body, is placed with movable block in the cavity between the piston push rod and injection nozzle, works as activityWhen block is located at injection nozzle one end, there is gap between movable block and the injector inner body wall, the gap connects the injectionThe cavity and injection nozzle of device body.
Preferably, described movable block is spheroid, its diameter is less than the internal diameter of the injector body cavity.By thingAfter expecting that (powder and liquid) loads bone cement injector, bone cement injector is rocked, spheroid is between piston push rod and injection nozzleFree movement, play a part of stirring, mixed material, movable block is arranged to spheroid, spheroid motion is smooth, advantageously in thingExpect the uniformity of mixing.The movable block of certain other shapes is equally applicable to the utility model, differ only in mixed effect andIncorporation time.
It is adapted preferably, one end that described piston push rod is located in injector body cavity body has with the spheroidArc groove.When using injector injection bone cement, enable to piston push rod as far as possible close to injection nozzle, and thenAvoid more bone cement from residing in injector body, reduce the waste of material.
Preferably, one end inwall that described injector body is connected with the injection nozzle is tapered, the conical inboard wallOn be provided with some projections, when the spheroid is resisted against in the projection, shape between spheroid and the injector inner body wallInto the gap.Upon injection, bone cement is directed into injection nozzle through the gap, avoids the clogging injection nozzle of spheroid.
Further, the duct of some connections is provided with described spheroid.The setting in duct can avoid spheroid from blocking upWhile filling in injection nozzle, the passage of the injection nozzle of bone cement entrance is added, bone cement injection flow is improved, avoids causing to notePenetrate the problem of resistance is big.
Preferably, the duct quantity is three, and three ducts are vertical two-by-two.Such a setting can be in most less porousOn the premise of road quantity, guarantee has a duct to be connected with injection nozzle, avoids ball position change or the rotation pair in injectionInfluence caused by bone cement injection flow, ensure the uniformity of injection flow.
Further, for ease of operation, the one end of the piston push rod away from the injection nozzle has operation handle.
Further, one end that described injector body is connected with injection nozzle is provided with installation sleeve, described injectionMouth is located in the installation sleeve, and the installation sleeve inwall is provided with internal thread.Bone cement can be noted using installation sleeveEnter device to be connected with other equipment, be easy to bone cement to inject human body.
Beneficial effect：Movable block is set in injector body in the application, stirring action can be effectively played, can be directRealize the mixing that bone cement material is realized in injector body, easy to operate practicality, it is not necessary to which other support the use facility.
Brief description of the drawings
Fig. 1 is bone cement injector dimensional structure diagram；
Fig. 2 is bone cement injector sectional view；
Fig. 3 is partial structurtes enlarged drawing in Fig. 2；
Fig. 4 is sphere structure schematic diagram；
1. injector body in figure, 11. installation sleeves, 12. is raised, 2. piston push rods, 21. handles, 22. arc grooves,3. spheroid, 31. ducts, 4. injection nozzles.
Embodiment
Embodiment
As shown in figures 1-4, a kind of bone cement injector, including injector body 1 and it is arranged on the injector body 1Interior piston push rod 2, the one end of the piston push rod 2 away from the injection nozzle 4 have operation handle 21, the injector body1 one end is with the injection nozzle 4 connected with the cavity of injector body 1, in the cavity between the piston push rod 2 and injection nozzle 4Movable block is placed with, when movable block is located at 4 one end of injection nozzle, between having between the inwall of movable block and injector body 1Gap, the gap connect the cavity and injection nozzle 4 of the injector body 1.What described injector body 1 was connected with injection nozzle 4One end is provided with installation sleeve 11, and described injection nozzle 4 is located in the installation sleeve 11, and the inwall of installation sleeve 11 is setThere is internal thread.
Illustrated in the present embodiment by spheroid 3 of movable block, the diameter of spheroid 3 is less than the cavity of injector body 1Internal diameter.One end that described piston push rod 2 is located in the cavity of injector body 1 has the arc being adapted with the spheroid 3Groove 22.One end inwall that described injector body 1 is connected with the injection nozzle 4 is tapered, is provided with the conical inboard wallSome raised 12, when the spheroid 3 is resisted against on described raised 12, formed between spheroid 3 and injector body 1 inwallThe gap.The duct 31 of three connections is provided with described spheroid 3, and three ducts 31 are vertical two-by-two.
In use, directly bone cement material powder and liquid can be added in injector body 1, injector, ball are rockedThe free movement in the cavity i.e. between piston push rod 2 and injection nozzle 4 of body 3, stirring, well mixed work are played to wherein materialWith, after the completion of mixing, the air in discharge injector body 1, and be connected injection nozzle 4 with gas apparatus using installation sleeve 11Implant operation can be carried out.If injection nozzle 4 is down during implant operation, spheroid 3 is resisted against in projection 12 under gravity, is pushed awayPiston push rod 2, bone cement are imported by the gap between spheroid 3 and the inside of injector body 1 and the duct 31 on spheroid 3In injection nozzle 4, injection is finally completed.