CN1156628A - Bone cement preparation kit having breakable mixing shaft forming output port - Google Patents
Bone cement preparation kit having breakable mixing shaft forming output port Download PDFInfo
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- CN1156628A CN1156628A CN 96121090 CN96121090A CN1156628A CN 1156628 A CN1156628 A CN 1156628A CN 96121090 CN96121090 CN 96121090 CN 96121090 A CN96121090 A CN 96121090A CN 1156628 A CN1156628 A CN 1156628A
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Abstract
A disposable telescoping mixing cartridge for mixing and delivering a quantity of bone cement. The cartridge cap includes a break-away agitator which opens an outlet port for the flow of cement. Therefore, the single opening serves as both an outlet port for the cement and the opening through which the agitator is reciprocated.
Description
The present invention relates to the aggregation for preparing by preparation facilities that is used to prepare bone cement and disposable prepackage that different cement compositions is formed.Disposable device and as for the purpose of the convenience separately the aggregation of the composition of sterilization wrap comprise the mixing drum of the telescopiform of an agitator with vacuum release mechanism and broken disengagement.The agitator of broken disengagement forms the outlet of discharging for bone cement.
In many orthopaedic surgery, bone cement is used for implant is fixed to bone.The bone cement of prior art is polymeric material normally, and it prepares by required composition is carried out combined polymerization.Bone cement is to carry out copolymerization by the copolymer to a kind of liquid monomer and a kind of powder to come out described copolymer such as methacrylate and polymethacrylates or methyl methacrylate-styrene.When the composition of bone cement mixes, in cement, can form bubble.Consider that the final strength for improving cement just must remove bubble from mix, to guarantee to produce uniform product.Therefore, the mixed ideal ground of composition is to carry out in a vacuum.
As known in prior art, the composition that separates can mix in mixing drum.Mixing drum, when it was in fully the state that extends, the volume that provides big being used to mix composition was guaranteeing that composition can mix equably.This mixing drum closes with the cap seal that can throw off usually, and said lid comprises a hole that is used to be connected to the band valve on the vacuum pump.In mixed process, vacuum pump is evacuation in tube, to reduce the incidence rate of bubble in the cement.Lid has the delivery outlet of a biasing, discharges the mixture of blended cementation thing by this hole, and lid also has a centre bore, and agitator can be packed into toward ground return by this hole.Agitator has elongated an axle and a blade that is used to mix composition.The axle of agitator is just fractureed after mixing, and the delivery outlet of biasing is opened, so that discharge cement.In the vacuum cylinder mixing arrangement of prior art, the end plunger discharges after mixing, and tube still remains on vacuum state.Vacuum pressure in the tube sucks in the tube plunger, so that collect cement.When the power that is produced by vacuum was balanced, plunger stopped at the motion in the tube.After cement mixes fully, the axle fracture of agitator, tube is inserted in the common viscoelastic agent filling gun, and the cement filling gun is known in prior art.Usually, different cement nozzles is fixed on the delivery outlet, cement is applied in the bone cavity so that help.Because the delivery outlet off-center have the cement of some not discharge in tube, so it goes out of use with tube.
Therefore, user is packed and given to different cement composition and mixing arrangements respectively.Because cement is very fast just can be solidified, the preparation and administration to of bone cement is very harsh in time.The preparation of bone cement is normally carried out under the aseptic condition of operating room.Therefore, each device must provide with aseptic packaging.With various mixing arrangements with the cement composition all is packaged into a packaged aggregation or kit utility offers user, should most convenient for the user in the operating room.
The invention provides the disposable mixing arrangement that a kind of mode with a kind of disposable utensil easily that is used to prepare bone cement installs and the aggregation of various cement compositions.These complete articles for use comprise the storage capsule of a shaping, several monomeric ampoule bottles of liquid cement that are equipped with, several packaging bags that Powdered cement copolymer is housed, vacuum pump, connection tube with vacuum indicator, mixing drum, cover and agitator, the adapter and the funnel-form adnexa of connection cement nozzle.For convenience and use under the gnotobasis in operating room effectively, this kit utility can be packaged into a unit.In addition, the storage capsule of shaping remains on each parts easily on the position, so that make things convenient for user when the preparation bone cement.For example, storage capsule keeps mixing drum with stable upwards position, and thus, user can buttress tube, thereby frees hand to operate agitator or vacuum pump.
The disposable intussusception mixing drum of this kit utility uses a vacuum release mechanism, and this mechanism is released in the vacuum in the cement tube when the tube of intussusception is compressed.Tube comprises the tube-shaped column body of two intussusceptions.Inner cylinder rotatably is received in the exterior circular column.Inner cylinder has a L shaped vertical passage, and exterior circular column comprises a ridge or a key that is positioned at passage, so that make inner cylinder with respect to exterior circular column locking or release.On the other hand, passage also can be step-like, therefore, so that inner cylinder can be rotated in exterior circular column between the position of three selections and axially move, said three positions are the hybrid positions that extend fully, the dispensing position of intermediary vacuum off-position and indentation.
Cover comprises the agitator of a broken disengagement, and this agitator is used as delivery outlet in the back that fractures.Therefore, lid has only an opening, and it not only can be used as the delivery outlet of cement but also can serve as for the opening of agitator by its back and forth movement.But agitator comprises a handle and one and is contained in the elongated axle of the back and forth movement in the delivery outlet of lid.Axle comprises a piped outer sleeve and an interior bar that axially is contained in the sleeve.Sleeve has the far-end of a frangible hollow.The blade of agitator extends from telescopic distal radial ground, is used to help the mixing of the composition of bone cement.The distal end of bar is connected on the end rod of dumb-bell shape of an one, than in the middle of the end rod of the dumb-bell shape of minor diameter partly near the annular groove that in sleeve, forms, telescopic far-end is dismountable with axle, and therefore, the mixture of blended cement can be discharged by it.The structure of the end rod of dumb-bell shape makes bar hold the middle partly crooked of bar, and sleeve can be in the groove fragmentation.The far-end of telescopic hollow then remains on the position of the delivery outlet of lid, and the discharge for blended cement mixture provides a passage thus.
Therefore, the invention has the advantages that provides a kind of mode with single aseptic articles for use easy to use to pack, and is used for vacuum and mixes and the disposable mixing arrangement of tube transmission and the aggregation of cement composition.
Another advantage of the present invention is, when composition mixes, and the mixing drum that has been included in pallet rest in the articles for use, thus, tube does not need the people to come rest when preparation cement mixture.
Another advantage of the present invention is that the mixing drum of intussusception has a vacuum release mechanism, and this mechanism discharges vacuum pressure when the tube of withdrawal intussusception.
The present invention also has an advantage to be to cover and has only an independent delivery outlet, and agitator can pass through its back and forth movement in mixed process, and cement can be discharged by it when cement applies.
Other advantage will be more readily apparent from by following explanation.
The preferred embodiments of the present invention are purpose description as an illustration, wherein:
Fig. 1 is the perspective view of implement of the present invention;
Fig. 2 is the mixing drum partly analysed and observe and the side view of connection cover, so that the mixing of explanation composition;
Fig. 3 is the perspective view of the mixing drum of the present invention partly analysed and observe, is used to illustrate its vacuum release mechanism;
Fig. 3 A is the perspective view of the mixing drum of the present invention partly analysed and observe, is used to illustrate the vacuum release mechanism of its two-stage;
Fig. 4 is the cutaway view along the mixing drum of the 4-4 hatching of Fig. 3;
Fig. 5 is the cutaway view along the mixing drum of the 5-5 hatching of Fig. 3;
Fig. 6 is the cutaway view of the agitator of lid of the present invention and broken disengagement, illustrates that the end plug with the dumbbell shaped of bar curves so that the end of overcoat is disconnected;
Fig. 7 is the cutaway view of the agitator of lid of the present invention and broken disengagement, illustrates that the end plug of rotating shaft and dumbbell shaped is thrown off from the end of overcoat;
Fig. 7 A is the profile of another embodiment of agitator of the present invention;
Fig. 8 is the perspective view of implement of the present invention, is used to illustrate that liquid and composition powder inject the situation of mixing drum by the funnel shaped device that is connected to tube;
Fig. 9 is the perspective view of implement of the present invention, is used to illustrate that being connected to being used on the mixing drum quickens the blended lid of composition and be connected to the vacuum pump that is used for this evacuation that covers;
Figure 10 is the perspective view of implement of the present invention, is used for explanation and is controlled at the intravital inner cylinder release of outside cylinder air pressure and staves mixing drum;
Figure 11 is the cutaway view of part mixing drum of analysing and observe of the present invention and the cement nozzle that is being connected, and is used to illustrate inside and outside cylindrical position.
Never mean the disclosed form of adhering rigidly to that limits the invention at the embodiment of this explanation, on the contrary, those skilled in the art can utilize above-mentioned instruction.
Fig. 1 illustrates the embodiment of apparatus 2 that the present invention is used to prepare the disposable operation of bone cement, apparatus 2 comprises following content: a storage container 10, the ampoule bottle 12 of several receiving fluids cement cell cubes, hold the packaging bag 14 of pulverous cement polymer, vacuum pump 20, connection tube 26 with vacuum indicator 28, a mixing drum 30,70, one in the agitator of a cover 60 and a broken disengagement can connect adapter 80 and funnel shaped adnexa 90 of the nozzle of cement.Preferably, the plastics that container 10 is annotated by mould are made, and it has a plurality of grooves (Fig. 1,8 and 9) with definite shape, the composition 4 of can pack in these grooves different mixing arrangements and composition cement.As shown in Figure 1, container 10 make all apparatus article can both store up into, and be to store up into (not shown) with the form of sterilization wrap separately.Every kind of apparatus article are placed on them in each comfortable container 10 in the formed corresponding groove 11.In addition, container 10 is keeping various article on the position easily, so that make things convenient for user when the preparation bone cement.For example, container 10 remains on mixing drum 30 on the stable position upwards, and therefore, user does not need the rest mixing drum, makes operator's hands can spare the injection composition, operated vacuum pumps 20 or agitator 70.
The composition 4 of preferred cement is to pack separately with the part that weighs up in advance.The monomer composition of liquid provides with ampoule bottle 12, and the copolymer of powder provides with packages sealed 4, although apparatus of the present invention can provide with any suitable packing for composition.The ampoule bottle 12 of liquid monomer and the packaging bag 14 of powder copolymer are known in the present technique field and are commercial can being provided by various sources.Vacuum pump 20 usefulness be a kind of pump of reciprocation type piston structure, although any suitable vacuum pump can be as the some of apparatus 2.Vacuum pump 20 comprises cylinder body 22 and drives the axle 24 that comes and goes of the piston (not shown) of an inside that vacuum pump 20 also comprises a test valve (not shown), so that make air-flow only pass through delivery side of pump in one direction.The length 26 of pipe is enough to make when covering on being connected to mixing drum 30 and can be connected on the pump, and preferably managing 26 has a vacuum indicator 28, and vacuum indicator 28 is rounds plastics or rubber, and its can flatten under the negative pressure of vacuum pump 20 extracting vacuum.
Mixing drum 30 preferably adopts disposable translucent plastics to make, so that can observe the mixing situation of composition 4.Tube 30 comprises the columnar cylinder 40,50 of two intussusceptions, two tubes 40,50 all have the near-end and the far-end of opening, exterior circular column 40 is axially admitted inner cylinder 50 with the structure of intussusception, the external diameter of inner cylinder 50 drops on the internal diameter of exterior circular column 40 coaxially, the external peripheral surface of inner cylinder 50 and the inner circumferential surface of exterior circular column 40 are with closely, but not gastight, connect in the mode of similar piston.Cylinder interior 50 was interior near its far-ends in the impervious piston plug 32 of air was contained in, and came the far-end of closed inner cylinder 50 thus.Plug 32 is can be in axial sliding in inner cylinder, with convenient socket joint to the cement spray gun the time discharging from the blended cement mixture 6 of tube 30.
Exterior circular column 40 is having a threaded outer rim 42 near the near-end of its opening, outer rim 42 make cover 60 and infundibulate adnexa 90 can be connected on tins 30.Although exterior circular column shown here 40 has an externally threaded outer rim, anyly be suitable for to provide the syndeton that connects infundibulate adnexa and lid 60 to use.Exterior circular column 40 also comprises the end flange 44 of annular, this flange stretch out near the far-end of its opening and one to projecting inward block ridge or key 46.To shown in Figure 5, the inner surface of exterior circular column 40 has a plurality of pressure exhaust grooves 41 from its near-end longitudinal extension as Fig. 2.
Shown in Fig. 2,6 and 7, cover 62 comprises the edge 62 of an annular, and the screw thread that its inner surface 62 (not shown) have the threaded edge 42 with exterior circular column 40 to be complementary is so that provide the connection of sealing at the near-end of whole exterior circular column 40.Lid 60 comprises the hole 64 of an one-way valve, and this hole is connected on the vacuum pump 20.Lid 60 also comprises a cement delivery outlet 66 at the center, and the outer surface in this hole 66 has screw thread, covers on 60 so that cement nozzle 80 is connected to.
As shown in Figure 6 and Figure 7, but agitator 70 comprises a handle 71 and one is installed in the elongated axle 72 that covers the back and forth movement in 60 the delivery outlet 66.Axle 72 comprises a piped overcoat 74 and a bar 76 that axially is positioned at cover 74.The jacket tube 74 of axle be can break into pieces and have a removable far-end 75.The blade 79 of agitator radially extends from the far-end 75 of the overcoat 74 of axle, is used to help the mixing of the composition 4 of bone cement.The distal end of interior bar 76 is connected on the end rod 78 of whole dumb-bell shape.Partly be located near the annular notch 73 that forms in the axle sleeve 74 in the middle of the minor diameter of the end rod 78 of dumb-bell shape.As shown in Figure 6 and Figure 7, the far-end 75 of overcoat 74 can be thrown off with axle 72, and thus, blended cement mixture 6 can be extracted out thus.When axle 72 is extracted into it outside extreme position in tube 30, is positioned near the inwall of lid 60 and the blade 79 that overlaps 72 far-end 75 and covers 60 delivery outlet 66.The structure of the end rod 78 of dumb-bell shape makes bar 76 hold the middle partly 77 places bending of rod 78, and axle sleeve 74 can fracture at recess 73 places.The far-end 75 of cover 74 hollow is retained in and cover in 60 the delivery outlet 66, so that provide a passage for the blended cement mixture 6 of discharge.
Fig. 7 shows the cover 74 of broken disengagement and another embodiment of dumb-bell shape end rod.Shown in Fig. 7 A, elongated axle 72 ' comprises overcoat 74 ' and interior bar 76 ' that axially is contained in the cover of a tubular, and axle sleeve 74 ' is broken, and has dismountable far-end 75 '.In the embodiment of Fig. 7 A, interior bar 76 ' is to be made by (as employed in medical pipe usually) soft polymer, and has constant inside and outside footpath.Rod 78 ' is fixed in the far-end near the interior bar 76 ' of the removable far-end 75 ' of overcoat 74 '.Hybrid blade 79 is connected to the far-end 75 ' of cover 74 ' and plays foregoing similar effect.During use, after the composition of bone cement mixed as the aforementioned fully, hybrid blade was recovered to the position near lid 62.Overcoat is bent to is enough to make it to locate to fracture in score line or recess 73 '.When overcoat was crooked, (by soft polymerization control) interior bar 74 ' was crooked or be compressed to and be enough to make the cracked degree of overcoat energy.In case after the overcoat fracture, the handle 71 ' in user pulling being connected to as shown in the figure on the bar 74 ' with adapter; Because handle, interior bar and residual shell are drawn out, and distal rod 78 ' departs from the center of hybrid blade 79, so that cement is flowed out thus.
Shown in Fig. 1,10 and 11, cementation device nozzle 80 is common structures, and it comprises that an elongated cervical region 82 and one are suitable for being connected to and covers 60 delivery outlet 66 male parts.As Fig. 1 and shown in Figure 8, infundibulate adnexa 90 comprises a butt taper flange 92 and an annular cervical region 94, and this cervical region 94 has a threaded inner surface (not shown) that makes funnel can be connected to tube 30 near-ends.
The usage of Fig. 8-11 explanation apparatus 2 when the preparation bone cement.Apparatus 2 and be connected to tube 30 infundibulate adnexa 90 and be packaged together in (not shown) in the external packing box.Should be noted that for for the purpose of easy to use tube 30 is that the hybrid position with its extension is contained in the storage capsule 10, as shown in Figure 8, the cement composition 4 of bone cement is poured mixing drum 30 into by funnel 90.In case the different composition of the cement of correct dose is poured in the tube, just remove infundibulate adnexa 90 and it is thrown away.Then lid 60 is taken off and covers from container 10 on the tube 30, take off vacuum pump 20 again from container 10, pipe 22 and vacuum indicator 24 and being connected to covers on 60 the vacuum hole 64.In case cover 60 and vacuum pump 20 being connected on the tube 30 as shown in Figure 9, with 24 pairs of tube 30 evacuation of round axle of hand-operating vacuum-pump 20.When vacuum indicator 28 was flattened, the expression tube had been in desired vacuum pressure, takes off vacuum pump then, and kept vacuum by the single-pass test valve (not shown) that covers in 60.Then, with the composition 4 of manual reciprocation type agitator hybrid cements, when composition 4 mixing fully of cement, agitator 70 is shifted onto its outer extreme position by mode well-known in the art, thus, the blade 79 of agitator is close to and is covered 60.
As shown in Figure 10 and Figure 11, discharge the vacuum pressure in the tube 30 then, and to the tube pressurization, for use in cement ejecting gun (not shown).In order to discharge the vacuum pressure in the tube 30, inner cylinder 50 is rotated and axial pressure, be allowed to condition in the exterior circular column 40 and move on to intermediary vacuum off-position by its extended position.The rotation of inner cylinder 50 in exterior circular column 40 makes key 46 enter vertical part 54 by lateral ends 57, thus, can pressurize to inner cylinder.Punctual when 57 pairs of key 46 and parts, inner core is in its vacuum and discharges and retrieving position.In the vacuum off-position, the position of the inner cylinder 50 in exterior circular column 40 is positioned at O-ring seals 52 places, and this is between the inside and outside cylinder 40,50, and provides gas-tight seal between the opposite end of the groove 41 that forms in exterior circular column.Groove 41 provides at the air duct that enters tube 30 inside around O-ring seals 52 by passage 41.
In another embodiment shown in Fig. 3 A, in order to discharge the vacuum pressure of tube in 30, inner cylinder 50 rotates also axial compression exterior circular column 40 in, moves on to intermediary vacuum off-position from its extended position.The rotation of inner cylinder 50 in exterior circular column 40 makes key 46 partly 57 move into vertically part 56 by transverse end, therefore, is recoverable to inner cylinder.When key 46 arrives intermediate lateral partly 55 the time, the axial compression of inner cylinder 50 exterior circular column 40 in located in middle vacuum off-position to stop.In the vacuum off-position, the position of inner cylinder 50 in exterior circular column 40 is to be positioned at O-ring seals 52 places, and the sealing circle and provides gas-tight seal between the two ends of the groove 41 that forms in exterior circular column 40 between inside and outside cylinder 40,50.Groove 41 provides the air duct that enters tube 30 inside around O-ring seals 52 by passage 41.In case 30 an interior pressure equates that inner cylinder 50 begins rotation again, make the vertical part 54 of the horizontal middle partly 55 ' immigration in key 46 edges.Now, inner cylinder 50 can fully be pressed into the retracted position that arrives it in the exterior circular column 40.
In case tube 30 is pressed into its retracted position, just with far-end 75 the fractureing and abandoning shown in Fig. 6 and 7 of the overcoat 74 of agitator, when agitator 70 fractures, rod 78 is released from lid, delivery outlet 66 is opened, suitable cement nozzle 80 just can install on the delivery outlet 66, and tube 30 can insert (not shown) in the tube that applies rifle.
Should be understood that above-mentioned explanation is not to limit the invention to above-mentioned explanation, but can make various improvement within the scope of the appended claims.
Claims (5)
1. one kind is used for comprising by mixing the device that multiple composition prepares bone cement:
A tube comprises the near-end with opening and the tube-shaped column body of a far-end, the lid that can be connected to said cylinder near-end, said cover piece comprise be used for said tube is connected on the vacuum pump in case in said tube the device of evacuation;
An end rod, it rotatably is contained in the said cylinder, is used in said cylinder the direction axially-movable towards said lid, so that from the said cement of said tube discharging;
An agitator device is used for the composition of binder of mixed bone in tube, and said lid has an opening of definition within it;
Said agitator device comprises: slender axles, but this have back and forth movement that an opening by said lid admits, the removable tubular far-end; A blade part that is used for axial back and forth movement in said tube that is connected to said overcoat far-end; Bar device in from the remote extension of said axle to agitator device; Be contained in being used in the said axle far-end and said axle far-end and said axle are thrown off and take off the device of bar device from said agitator device, thus, said cement can be by the far-end discharge of said axle.
2. according to the described device of claim 1, wherein said detachable apparatus comprises that is integrally connected to the end rod that the dumb-bell shape of said axle far-end was gone up and be contained in to said axle, said rod comprises the flexible middle part that a far-end that is used to make said axle can axial bending, thus, the far-end and said axle disconnection of said axle when the far-end of said axle is positioned at the opening of said lid.
3. according to the described device of claim 1, wherein said dismountable device comprises the flexible interior bar that axially is contained in the elongated axle, and the far-end of wherein said flexible interior bar constitutes said bar device.
4. one kind by mixing the device that multiple composition prepares bone cement, comprising:
A tube;
The lid that can be connected on the said exterior circular column near-end, said cover piece comprises and is used for said tube is connected to device on the vacuum pump, be used for when said inner cylinder is in its said extended position, extracting vacuum in said tube, said cover piece has qualification opening within it, is used for discharging said cement in said tube;
An end rod, it rotatably is contained in the said inner cylinder, is used for that the direction towards said lid moves axially in said inner cylinder, so that discharge said cement in said tube;
An agitator device is used to be blended in the composition in the said tube, and said agitator comprises an elongated axle, but this has dismountable tubular far-end that back and forth movement ground is admitted by the opening of said lid; Far-end that is connected to said cover is used in said tube the axially blades of back and forth movement, be used for from the device of the far-end of the said axle of said axle dismounting with the far-end that is contained in said axle, said thus cement can be discharged by the far-end of said axle.
5. according to the described device of claim 4, wherein said dismountable device comprises the rod of the dumb-bell shape on the far-end on the said axle of being connected to of an integral body and that be contained in said axle, said rod comprises that one is used to make the far-end of said axle can axially go up crooked curved middle part, thus, when the far-end of said axle was contained in the hole of said lid, the far-end of said axle can be from said axle disconnection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/541,543 US5624184A (en) | 1995-10-10 | 1995-10-10 | Bone cement preparation kit having a breakable mixing shaft forming an output port |
| US541,543 | 1995-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1156628A true CN1156628A (en) | 1997-08-13 |
Family
ID=24160027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96121090 Pending CN1156628A (en) | 1995-10-10 | 1996-10-10 | Bone cement preparation kit having breakable mixing shaft forming output port |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1156628A (en) |
| DE (1) | DE69625764D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337604C (en) * | 2002-04-11 | 2007-09-19 | 斯恩蒂斯有限公司 | Device for mixing and/or injection cement |
-
1996
- 1996-10-07 DE DE69625764T patent/DE69625764D1/en not_active Expired - Lifetime
- 1996-10-10 CN CN 96121090 patent/CN1156628A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337604C (en) * | 2002-04-11 | 2007-09-19 | 斯恩蒂斯有限公司 | Device for mixing and/or injection cement |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69625764D1 (en) | 2003-02-20 |
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| C06 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |