CN2732212Y - Controllable hydraulic type complete in vivo implanted bone-extending device - Google Patents
Controllable hydraulic type complete in vivo implanted bone-extending device Download PDFInfo
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- CN2732212Y CN2732212Y CN 200420093669 CN200420093669U CN2732212Y CN 2732212 Y CN2732212 Y CN 2732212Y CN 200420093669 CN200420093669 CN 200420093669 CN 200420093669 U CN200420093669 U CN 200420093669U CN 2732212 Y CN2732212 Y CN 2732212Y
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- oil cylinder
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- plunger
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Abstract
The utility model discloses a controllable hydraulic type complete in vivo implanted bone-extending device, comprising a pillar type and long rod shape bone-extending device, locking pieces, a connecting flexible hose, and a hydraulic device. The bone-extending device comprises a plunger rod, an oil cylinder and a connecting sleeve. Wherein, one segment of the plunger rod is arranged in the oil cylinder, the other segment extends from the lower part of the oil cylinder to the outside of the oil cylinder, the connecting sleeve is fixedly connected with the upper end of the oil cylinder, and the extending end of the plunger rod and the connecting sleeve are provided with the locking holes for installing the locking pieces. The hydraulic device is composed of a hydraulic pump and an oil tank; one end of the connecting flexible hose is connected with the oil outlet of the hydraulic pump, and the other end is connected to the inner side of the oil cylinder through the connecting sleeve of the bone-extending device. The utility model is of the manual hydraulic piston type structure, can be embedded into the human body completely, and can meet the requirements of bone and the soft tissue to be extended under the physiologically conformed condition.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, relates in particular to a kind of bone extension fixture that can implant fully and carry out bone prolongation operation by the callus lengthening mode.
Background technology
Because a variety of causes is comparatively common as infection, wound and shortening deformity of extremity phenomenon congenital or that abnormal development causes.Bone lengthening is to treat shortening deformity of extremity at present, recover or improve a kind of effective ways of limb function, wherein long bone metaphysis callus lengthening art be that a kind of extending length is big, knitting fast, damage less, few, the simple osteotomy prolongation method commonly used of complication relatively.The callus lengthening art is meant after the metaphysis osteotomy and keeps periosteum, and the mesenchymal cell that has very strong osteogenic ability in the periosteum can make bone healing by forming callus, apply the traction force that slowly continue by specific device this moment, thereby can reach the key purpose that prolongs so that the callus that the osteotomy place forms slowly prolongs.
At present, clinically widespread usage be Ilizarov exterior fixation bracket or similar with it exterior fixation bracket method.Its principle all is to penetrate draw point by the two ends in fracture (can be secondary to wound also can be for causing by doctor people), backshank is fixed on the annular steel ring, the latter is linked as a complete mechanical system external by the screw thread steel pole that parallels with the limbs longitudinal axis, thereby overtime produces on screw rod by steel ring and along the displacement of axis fracture end produced tractive tension force and reach the purpose that the control skeleton prolongs.But use this apparatus and also brought many complication: infect easily at (1) position of threading a needle, and draw point is to the cutting of muscle skin and cause pain; (2) owing to fixing uncertain, occur the skeleton angulation displacement easily, thereby cause malunion; (3) be in hospital for a long time, braking in addition leave hospital after all want the long periods of wear exterior fixation bracket, brought difficulty to daily life and nursing; (4) can leave over many ugly cicatrixes on the skin unavoidably.Everything not only makes the patient be difficult to accept, and those is wanted to seek help from the normal person that bone prolongs operation for pursuing cosmetic result, not less than being a kind of punishment.And also exist the risk factor that fracture takes place in a period of time after removing exterior fixation bracket, area of new bone can not return to normal level in the short time on mechanical strength after all.The someone has carried out improvement and has used intramedullary nail with nail in conjunction with the exterior fixation bracket method in recent years, though overcome shortcomings such as one-tenth angle, displacement and refracture, but caused cicatrix to increase, need second operation to lock and increased the misery and the expense of operation, and destroyed the blood supply in the medullary cavity and make shortcoming such as bone healing time prolongation.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of body fully to be implanted into, meet the requirement that physiological condition sending down the fishbone prolongation and soft tissue regeneration thereof prolong, can greatly improve patient's the toleration and the complete body of social adaptiveness and be implanted into controlled hydraulic formula bone extension fixture.
The purpose of this utility model is achieved by the following technical programs:
A kind of complete body that this utility model provides is implanted into controlled hydraulic formula bone extension fixture, comprise column type elongated rod shape bone elongation pad, locking piece, connection flexible pipe and hydraulic press, described bone elongation pad comprises plunger rod, oil cylinder and adapter sleeve, wherein one of plunger rod section is arranged in the oil cylinder, another section stretches out outside the oil cylinder from the lower end of oil cylinder, described adapter sleeve is fixedly connected on the upper end of oil cylinder, is equipped with the lock hole that is used to install locking piece on the external part of plunger rod and the adapter sleeve; Described hydraulic press is made of hydraulic pump that is integrated and fuel tank, wherein hydraulic pump comprises the pump housing, plunger and check valve, described plunger is arranged in the plunger cavity of the pump housing, the termination of one end is a bulb type button, this button is exposed to the front end of the pump housing, and plunger cavity is communicated with fuel tank by the oil-in on its wall, and described check valve is arranged in the valve pocket of the pump housing, this valve pocket is communicated on the oil-out of hydraulic pump, is equipped with spring on described plunger and the check valve; One end of described connection flexible pipe is communicated with the oil-out of hydraulic pump, and its other end is communicated in the oil cylinder by the adapter sleeve of bone elongation pad.
During use, with in the bone elongation pad implantable bone pulp cavity of the present utility model, utilize locking piece (as screw or pin) that the skeleton of bone elongation pad with two ends, osteotomy plane linked to each other at the lock hole place of bone elongation pad by operation.Hydraulic press is imbedded subcutaneous and is fixed on the cortical bone so that manually control.Hydraulic pump in the hydraulic press is a single plunger valve pump, when advancing bulb type button to make plunger inwardly produce compression movement, plunger wall has been blocked oil-in, liquid pressurized in the plunger cavity is opened check valve and is entered in the valve pocket, flows in the oil cylinder of bone elongation pad spare in the medullary cavity by connecting flexible pipe from oil-out then.Liquid promotion this moment plunger rod is done rectilinear motion along oil cylinder, and knochenbruch promptly automatically prolongs.
After in the hydraulic press motive force of bulb type button being disappeared, check valve adverse movement under the effect of spring and closing, the plunger adverse movement makes oil-in be communicated with fuel tank and plunger cavity again, and the negative pressure during the plunger return flows into liquid.When promoting plunger once more, can begin to circulate next time.Adopt the inflow that check valve can controlling liquid and limited the outflow of liquid, thereby guarantee the unidirectional prolongation campaign of extender, prevented the retraction of the broken ends of fractured bone.
For preventing the rotation between plunger rod and oil cylinder, this utility model can be taked following further measure: described bone elongation pad also comprises dive key and flat key cover, described flat key is enclosed within fixedlys connected with the termination of plunger rod in the oil cylinder, and dive key is arranged between the inwall of outer wall that flat key overlaps and oil cylinder.Perhaps described plunger rod is positioned at in-oil cylinder one section and has a plane in a side, is fixed with a corresponding adaptive dive key with this plane on the inwall of oil cylinder.Because dive key has limited reversing of the relative cylinder body of plunger that moment of face may cause, has therefore guaranteed that knochenbruch can only prolong axial elongation and can not produce torsiversion, avoids causing malunion.In addition, also can take following measure, promptly described plunger rod is the hexagonal column type, and the inwall of oil cylinder is corresponding adaptive hexagonal configuration with plunger rod.Also can avoid rotation between plunger rod and oil cylinder by this structure.
Lock hole on the bone elongation pad plunger rod described in the utility model can have two, wherein the lock hole of near-end can after bone extends to predetermined length, can be pulled out the locking piece of far-end for the sliding tray hole, with the bone elongation pad motorization, promote sclerotin healing thereby produce axial compression stress.
For strengthening the sealing of bone elongation pad, also be provided with the oil cylinder plug in the adapter sleeve of bone elongation pad described in the utility model; Described oil cylinder plug goes out to hold and the oil-out of hydraulic pump has the hose coupling that is sealing cone respectively.
The fuel tank of hydraulic press described in the utility model is soft utricule, and is whole for sealing with pump housing connection.
The utlity model has following beneficial effect:
(1) adopted the technology path of mature and reliable, workable, reduced the probability that breaks down in vivo after implanting to greatest extent.
(2) can realize the callus lengthening of branch stage progressive, more meet the requirement that physiological condition sending down the fishbone prolongation and soft tissue regeneration thereof prolong.
(3) use this utility model, patient's hospital stays is very short, after implanting, operation can leave hospital, and all prolongations operation can be carried out outside institute, and can keep the state of taking care of oneself substantially normally, greatly improve patient's toleration and social adaptiveness, reduced patient's physiology and psychological burden.
(4) applied widely, except being applied to primary diseases such as geneogenous of short and small stature, dwarfism, achondroplasia, poliomyelitis sequela, geneogenous tibial pseudarthrosis, can also being applied in treatment and being secondary to wound, bone tumor, osteomyelitis or the growth plate shortening deformity of extremity that causes such as impaired.
Description of drawings
Below in conjunction with embodiment and accompanying drawing this utility model is described in further detail:
Fig. 1 is to use the structural representation of one of this utility model embodiment;
Fig. 2 is the structural representation of bone elongation pad among one of this utility model embodiment;
Fig. 3 is the A-A view of Fig. 2;
Fig. 4 is the structural representation of hydraulic press among one of this utility model embodiment.
Among the figure: bone elongation pad 1, plunger rod 101, oil cylinder 102, dive key 103, flat key cover 104, adapter sleeve 105, soket head cap screw 106, pushing block 107, packing ring 108, oil cylinder plug 109, sealing ring 110, back-up ring 111, lock hole 112 connects flexible pipe 2, hydraulic press 3, clamp nut 301, the pump housing 302, button 303, plunger 304, check valve 305, plunger cavity 306, oil-in 307, pump housing base 308, valve pocket 309, oil-out 310, spring 311, nipple 312, hose coupling 313, locking piece 4, skeleton 5, callus 6
The specific embodiment
Embodiment one:
Fig. 1～Figure 4 shows that one of embodiment of the present utility model, comprise column type elongated rod shape bone elongation pad 1, locking piece 4 as shown in Figure 1, connect flexible pipe 2 and hydraulic press 3, wherein bone elongation pad 1 is by in the operation implantable bone pulp cavity, and utilizing locking piece 4 (as screw or pin) that the skeleton 5 of bone elongation pad 1 with two ends, osteotomy plane linked to each other, hydraulic press 3 is imbedded subcutaneous and is fixed on the cortical bone so that manually control.Connecting flexible pipe 2 is used for the liquid of hydraulic press 3 is transported in the bone elongation pad 1.
As shown in Figures 2 and 3, bone elongation pad 1 comprises plunger rod 101, oil cylinder 102, dive key 103, flat key cover 104 and adapter sleeve 105, wherein plunger rod 101 and oil cylinder 102 are column type, one section of plunger rod 101 is arranged in the oil cylinder 102, another section stretches out outside the oil cylinder from the lower end of oil cylinder, one end of flat key cover 104 is fixedlyed connected with the termination of plunger rod 101 by soket head cap screw 106 in oil cylinder, its other end is connected with a pushing block 107, be provided with packing ring 108 between flat key cover 104 and the pushing block 107, dive key 103 is arranged on (see figure 3) between the inwall of the outer wall of flat key cover 104 and oil cylinder 102.Adapter sleeve 105 is fixedly connected on the upper end of oil cylinder 102, is provided with packing ring 108 and oil cylinder plug 109 between the two.Be provided with sealing ring 110 between plunger rod 101 and the oil cylinder 102, be provided with sealing ring 110 and back-up ring 111 between oil cylinder plug 109 and the oil cylinder 102.Be respectively equipped with two lock holes 112 that are used to install locking piece on the external part of plunger rod 101 and the adapter sleeve 105, wherein the lock hole of near-end is the slip slotted eye on the plunger rod 101.
As shown in Figure 4, hydraulic press 3 is made of hydraulic pump that is integrated and fuel tank, and wherein hydraulic pump comprises the pump housing 302, plunger 304 and check valve 305, and fuel tank is soft utricule, is the whole (not shown) of sealing with the pump housing 302.Plunger 304 is arranged on by clamp nut 301 in the plunger cavity 306 of the pump housing, and the termination of one end is a bulb type button 303, and this button is exposed to the front end of the pump housing 302.Plunger cavity 306 is communicated with fuel tank by the oil-in 307 on its wall.Check valve 305 is arranged on by pump housing base 308 in the valve pocket 309 of the pump housing, and this valve pocket 309 is communicated on the oil-out 310 of hydraulic pump.Be equipped with spring 311 on plunger 304 and the check valve 305.
Oil cylinder plug 109 goes out to hold and the oil-out 310 of hydraulic pump has the hose coupling 313 that is sealing cone respectively, an end that connects flexible pipe 2 is communicated with the oil-out 310 of hydraulic pump by a nipple 312 and hose coupling 313, and its other end is communicated in the oil cylinder 102 by adapter sleeve 105, oil cylinder plug 109 and the hose coupling 313 of bone elongation pad 1.
During use, advance bulb type button 303 to make plunger 304 inwardly produce compression movement, this moment, plunger wall was blocked oil-in 307, liquid pressurized in the plunger cavity 306 is opened check valve 305 and is entered in the valve pocket 309, flows in the oil cylinder 102 of bone elongation pad 1 in the medullary cavity by connecting flexible pipe 2 from oil-out 310 then.Liquid promotion this moment plunger rod 101 is done rectilinear motion along oil cylinder 102, and knochenbruch promptly automatically prolongs, and callus 6 is prolonged.Because dive key 103 has limited reversing of plunger rod 101 relative cylinder bodies 102 that moment of face may cause, so has guaranteed that knochenbruch can only prolong axial elongation and can not produce torsiversion, avoids causing malunion.After bone extends to predetermined length, can pull out the locking piece of plunger rod far-end, with the bone elongation pad motorization, promote sclerotin healing thereby produce axial compression stress.
After the motive force of bulb type button 303 disappeared, check valve 305 adverse movements under the effect of spring 311 and closing, plunger 304 adverse movements make oil-in 307 be communicated with fuel tank and plunger cavity 306 again, and the negative pressure during plunger 304 returns makes the liquid inflow.When promoting plunger 304 once more, can begin to circulate next time.The design each run makes the intramedullary bone extender do the extension that prolongs 0.1-0.2mm, makes the prolongation distance of every day be controlled at 1.0-1.5mm by the gradation campaign.Adopt the inflow that check valve 305 can controlling liquid and limited the outflow of liquid, thereby guarantee the unidirectional prolongation campaign of extender 1, prevented the retraction of the broken ends of fractured bone.
Embodiment two:
Present embodiment and embodiment one difference are: plunger rod 101 is positioned at a section of oil cylinder 102 inner ends and has a plane in a side, be fixed with a corresponding adaptive dive key with this plane by screw on the inwall of oil cylinder 102, and this dive key is corresponding adaptive arcuate guide flat key (not shown) with oil cylinder inner wall.Saved the installation that is provided with of flat key cover 104, pushing block 107 and packing ring 108.
Embodiment three:
Present embodiment and embodiment two differences are: plunger rod 101 is the hexagonal column type, and the inwall of oil cylinder 102 is and plunger rod 101 corresponding adaptive hexagonal configurations, thus saved dive key 106 the installation (not shown) is set.
Claims (8)
1, a kind of complete body is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: comprise column type elongated rod shape bone elongation pad (1), locking piece, connect flexible pipe (2) and hydraulic press (3), described bone elongation pad (1) comprises plunger rod (101), oil cylinder (102) and adapter sleeve (105), wherein one of plunger rod section is arranged in the oil cylinder, another section stretches out outside the oil cylinder from the lower end of oil cylinder, described adapter sleeve (105) is fixedly connected on the upper end of oil cylinder (102), is equipped with the lock hole (112) that is used to install locking piece on the external part of plunger rod (101) and the adapter sleeve (105); Described hydraulic press (3) is made of hydraulic pump that is integrated and fuel tank, wherein hydraulic pump comprises the pump housing (302), plunger (304) and check valve (305), described plunger (304) is arranged in the plunger cavity (306) of the pump housing, the termination of one end is a bulb type button (303), this button is exposed to the front end of the pump housing, plunger cavity is communicated with fuel tank by the oil-in (307) on its wall, described check valve (305) is arranged in the valve pocket (309) of the pump housing, this valve pocket is communicated on the oil-out (310) of hydraulic pump, is equipped with spring (311) on described plunger and the check valve; One end of described connection flexible pipe (2) is communicated with the oil-out (310) of hydraulic pump, and its other end is communicated in the oil cylinder (102) by the adapter sleeve (105) of bone elongation pad (1).
2, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: described bone elongation pad (1) also comprises dive key (103) and flat key cover (104), described flat key cover (104) is fixedlyed connected with the termination of plunger rod (101) in oil cylinder (102), and dive key (103) is arranged between the inwall of the outer wall of flat key cover (104) and oil cylinder (102).
3, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: described plunger rod (101) is positioned at a section of oil cylinder (102) and has a plane in a side, is fixed with a corresponding adaptive dive key with this plane on the inwall of oil cylinder.
4, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: described plunger rod (101) is the hexagonal column type, and the inwall of oil cylinder (102) is and the corresponding adaptive hexagonal configuration of plunger rod (101).
5, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: the lock hole (112) on the described bone elongation pad plunger rod (101) has two, and wherein the lock hole of near-end is the slip slotted eye.
6, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: be provided with oil cylinder plug (109) between oil cylinder of described bone elongation pad (102) and the adapter sleeve (105).
7, complete body according to claim 6 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: described oil cylinder plug (109) goes out to hold and the oil-out (310) of hydraulic pump has the hose coupling (313) that is sealing cone respectively.
8, complete body according to claim 1 is implanted into controlled hydraulic formula bone extension fixture, it is characterized in that: the fuel tank of described hydraulic press (3) is soft utricule, and is whole for sealing with the pump housing (302) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093669 CN2732212Y (en) | 2004-09-30 | 2004-09-30 | Controllable hydraulic type complete in vivo implanted bone-extending device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093669 CN2732212Y (en) | 2004-09-30 | 2004-09-30 | Controllable hydraulic type complete in vivo implanted bone-extending device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2732212Y true CN2732212Y (en) | 2005-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420093669 Expired - Fee Related CN2732212Y (en) | 2004-09-30 | 2004-09-30 | Controllable hydraulic type complete in vivo implanted bone-extending device |
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| Country | Link |
|---|---|
| CN (1) | CN2732212Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558324C (en) * | 2006-11-10 | 2009-11-11 | 重庆大学 | Self controlled intramedullary bone lengthening device |
| CN104287874A (en) * | 2014-10-22 | 2015-01-21 | 广州新诚生物科技有限公司 | Extendable prosthesis for children |
| CN107518961A (en) * | 2017-08-18 | 2017-12-29 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
-
2004
- 2004-09-30 CN CN 200420093669 patent/CN2732212Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558324C (en) * | 2006-11-10 | 2009-11-11 | 重庆大学 | Self controlled intramedullary bone lengthening device |
| CN104287874A (en) * | 2014-10-22 | 2015-01-21 | 广州新诚生物科技有限公司 | Extendable prosthesis for children |
| CN104287874B (en) * | 2014-10-22 | 2017-05-03 | 广州新诚生物科技有限公司 | Extendable prosthesis for children |
| CN107518961A (en) * | 2017-08-18 | 2017-12-29 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
| CN107518961B (en) * | 2017-08-18 | 2020-09-11 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |