CN101803942B - Step motor type pressure feedback multi-mode micromovement external fixator - Google Patents
Step motor type pressure feedback multi-mode micromovement external fixator Download PDFInfo
- Publication number
- CN101803942B CN101803942B CN2010101065024A CN201010106502A CN101803942B CN 101803942 B CN101803942 B CN 101803942B CN 2010101065024 A CN2010101065024 A CN 2010101065024A CN 201010106502 A CN201010106502 A CN 201010106502A CN 101803942 B CN101803942 B CN 101803942B
- Authority
- CN
- China
- Prior art keywords
- external fixator
- fracture
- step motor
- mode
- healing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Surgical Instruments (AREA)
Abstract
The invention belongs to a medical device, i.e. an external fixator for treating bone fracture, in particular to a step motor type pressure feedback multi-mode micromovement external fixator, solving the problem that a healing stage can not be judged, stimulations needed by a fracture site in all healing stages can not be provided comprehensively, and even healing can be inhibited by using the present external fixator for fracture rehabilitation. The external fixator comprises clamping needle fixers; the two clamping needle fixers are respectively connected with a guide post and a guide sleeve; a step motor seat is mounted on the guide post for fixing a step motor controlled by a controller; a sensor seat is mounted on the guide sleeve; a pressure sensor is mounted on the sensor seat; and a ballscrew nut pair is mounted on the pressure sensor. The external fixtor overcomes the defects that the situations of a fracture site in healing stages can not be judged and the mechanical stimulation can not be pertinently regulated by the traditional design, realizes a dynamic pressure stimulation mode, solves the problem of callus damage during the late period of fracture healing by a single displacement stimulation mode, and realizes individualization and digitalization of a therapeutic scheme to obtain a satisfied curative effect.
Description
Technical field
The fractures that the invention belongs to medical apparatus and instruments is used external fixer, is specifically related to a kind of step motor type pressure feedback multi-mode micromovement external fixator.
Background technology
The general therapeutic limb fracture can adopt external fixation technology such as broach, steel plate internal fixation technology and clamping plate, plaster fixation, metal external fixer.Clinical observation finds that too strong fixing (comprising internal fixation and external fixation) can cause union of fracture slow, and unsettled fixedly meeting causes union of fracture to postpone, not even healing.Keep under the basicly stable prerequisite, suitable fine motion or pressure can promote the healing of fracturing.
Usually through modes such as limbs exercise, heavy burdens, fracture site is applied fine motion or Pressure stimulation.But these modes can't quantize to observe to the stimulation of fracture site.And factors such as patient's mobility and pain stimulation also influence the enforcement of exercise.And under the internal fixation condition, the pressure that limbs bear a heavy burden is born by inside-fixture mostly, and is uncertain to the mechanical stimulation of the broken ends of fractured bone.The clinical device that need carry out the controlled dynamic pressurization to fracture site promotes knitting.
Chinese scholars adopts external fixer to combine the mode of frame for movement, makes the compression of external fixer active cycle, and the broken ends of fractured bone is applied dynamic pressure.The power mode of their starting point and design philosophy and employing, structure, assembling etc. are not quite similar.To consider that frequency, amplitude are main.These researchs have obtained preliminary experience, also find some problems simultaneously.Stimulate through the fine motion that external fixer gives fracture site 0.25mm different frequency like domestic Zhang Xianlong etc., finding has facilitation to callus formation in early days.Jogodzinski sums up external correlational study achievement in the recent period, finds that early stage broken ends of fractured bone fine motion stimulates, and can promote the formation of callus, and late period, the fine motion stimulation then suppressed growth of spur.Its reason and the stronger osseous callus of rigidity in late period form, and can not bear excessive distortion, and take place to destroy relevant.But clinical observation finds to fracture late period through bearing a heavy burden, and pressurization is played acceleration to union of fracture to the broken ends of fractured bone.Fine motion stimulation test and clinical observation explanation fracture are not suitable for the fine motion stimulation late period, and only need give certain pressure stimulates, and does not need obvious deformation, can play to promote the healing effect.
Now, domestic scholar also develops the DYN dynamic fine motion convalescence device of different types of structure, but all has certain defective or deficiency.
Cross according to domestic literature and some patent introductions and to adopt DYN dynamic inching gear.The cam mechanism that utilizes that has is realized moving back and forth, and frequency relies on motor speed to change.Reciprocating stroke (fine motion amplitude) is determined by cam lift.It can only rely on the replacing cam to regulate the fine motion amplitude, poor practicability, and the pressure that fracture site obtained can't be confirmed.
Also having the DC micromotor of employing to drive leading screw makes mechanism realize reciprocating (one Chinese patent application 021371775.X).The point of penetration of this device during fracture recovering is that frequency, time and amplitude are main; Realized periodically fine motion; But it has only realized the adjusting of displacement stimulation (also being that above-mentioned fine motion stimulates), and possibly there is certain interval in screw structure, is unfavorable for accuracy controlling.The most important thing is that this device can't confirm circuit ending pressure.
To sum up explanation applies strain only stimulates the external fixer (for example Chinese patent 02137175.X) of (being broken ends of fractured bone fine motion) can not satisfy the needs in each stage of union of fracture, and might play the retroaction that suppresses healing.Therefore adopt the different mechanical stimulation mode according to the healing stage, the specific aim treatment just can reach good therapeutic effect.
How to judge that the healing stage is another important difficult problem.Union of fracture divides hematoma formation, fiber callus, cartilage callus, a plurality of stages of osseous callus.Existing experimental result all adopts cross-section model of long bone or transverse fracture patient, and the fracture concordance is fine, can judge the healing stage through the time.And during clinical practice, owing to the equal reason of individual variation, classification of fracture, even recovery time is identical, Different Individual union of fracture situation difference also can be very big.And clinically, except that osseous callus can be observed on X-ray film, other stage conventional methods can't effectively be discerned.Utilize existing fracture fine motion external fixation system all can't judge the healing stage, thereby can not formulate specific aim mechanical stimulation therapeutic scheme.Clinical for being applied to, improve therapeutic effect, judge that the union of fracture stage is the problem that must solve.
Summary of the invention
The present invention can not judge the healing stage in order to solve in the prior art fracture recovering external fixer; The required stimulation of stage fracture site of respectively healing can not be provided comprehensively; Even can play the problem of the ill effect that suppresses healing, a kind of digitized step motor type pressure feedback multi-mode micromovement external fixator of control automatically is provided.
The present invention adopts following technical scheme to realize:
Step motor type pressure feedback multi-mode micromovement external fixator; Comprise two folder needle locks, two folder needle locks are connected with guide pillar, guide pin bushing respectively, and the motor seat is installed on the guide pillar; Be used for fixing motor by controller control; Sensor installation seat on the guide pin bushing is equipped with the pressure transducer that can transmit signal to controller on the sensor holder, the ballscrew nut fitting that is connected with the outfan of motor is installed on the pressure transducer.
Pressure transducer is experienced pressure; Be transferred to controller (like DSP, single-chip microcomputer etc.); Controller is regulated the control step motor according to imposing a condition, motor drives ball guide screw nat and reaches setting pressure or displacement, and pressure data and displacement data all show through controller.
Power executive component (motor), ball guide screw nat and pressure transducer select for use consideration with population structure or the like all taked advanced, that be prone to popularize, realize Digital Control, high-precision components and parts and design cheaply and easily.(annotate: motor, ball guide screw nat are the common configuration that realizes Digital Control.Owing to adopt motor, therefore, can be convenient to use controller such as DSP it is controlled.Ball guide screw nat does not have good behaviours such as gap, coefficient of friction are little, mechanical efficiency height provides basic guarantee for obtaining accurate data.)
(the hematoma stage is the softest because each stage mechanical property (like elastic modelling quantity) of union of fracture has a great difference; The fiber callus, the cartilage callus increases to osseous callus hardness gradually), pressure measurement (controller and pick off mating reaction after measurement deformation or the deformation after the present invention adopts and pressurizes; Control is exerted pressure and is measured the deformation of broken ends of fractured bone place tissue; Perhaps control the drag of its generation of distortion measurement of broken ends of fractured bone place tissue), institute's deformation data that obtain or pressure data just can reflect the mechanical property of fracture site, the judgement healing stage; Thereby give mechanical stimulation scheme targetedly, improve curative effect.
Stimulation protocol can adopt the setting displacement model; Also can adopt setting pressure pattern (controller is regulated machine operation according to pressure sensor data and reached setting pressure under the setting pressure condition, sets under the displacement condition controller and directly regulates machine operation according to setpoint distance and reach setpoint distance).Other relevant parameters (as: frequency, time etc.) all can be set through controller programming.
Device of the present invention is taken all factors into consideration complexity, the randomness of fracture site, can accurately know the mechanical property of fracture site according to the patient in the different rehabilitation stages, judges the healing stage, according to the broken ends of fractured bone information that obtains, carries out mechanical stimulation.Except that the pattern that can adopt the control displacement was pressurizeed, the pattern that also can adopt controlled pressure to pressurize applied dynamic pressure to the broken ends of fractured bone, avoids the inhibition of some phase displacement pattern to growth of spur.The equal scalable of the parameters of various stimulus modelities can realize that the individuation of mechanics stimulation mode is used.
As stated; The present invention is compared with prior art: the information of at first obtaining through dynamic pressurization; Measure broken ends of fractured bone mechanical property, judge the different phase of union of fracture, the periodicity mechanics that gives different mode (displacement stimulus modelity or Pressure stimulation pattern) then respectively stimulates.Overcome existing design and can't judge broken ends of fractured bone healing phase scenario, drawback that can't specific aim adjustment mechanical stimulation.And realized the dynamic pressure stimulus modelity, overcome independent displacement stimulus modelity and caused the destructive defective of callus in the union of fracture later stage.Parameters such as the frequency of various stimulus modelities, pressure, amplitude all can be regulated through controller, realize individuation, the digitized of therapeutic scheme, obtain gratifying curative effect easily.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the side view of Fig. 1
Among the figure: 1-motor, 2-motor seat, 3-bolt I, 4-yielding coupling, 5-guide pillar; 6-sensor holder pressing plate, 7-bolt II, 8-sensor holder, 9-pressure transducer, 10-ball guide screw nat; 11-bolt III, 12-bolt IV, 13-guide pillar, guide pin bushing seat pressing plate, 14-guide pin bushing, 15-guide pillars and bushes seat; 16-sphere universal joint, the 17-side guide, 18-presss from both sides needle lock, 19-motor cabinet pressing plate.
The specific embodiment
Be described further in conjunction with the accompanying drawing specific embodiments of the invention.
The present invention includes motor 1, motor seat 2, yielding coupling 4, guide pillar 5, pick off pressing plate 6, sensor holder 8, pressure transducer 9, ball guide screw nat 10, guide pillars and bushes seat pressing plate 13, guide pin bushing 14, guide pillars and bushes seat 15, sphere universal joint 16, side guide 17, folder needle lock 18, motor cabinet pressing plate 19 and controller (like DSP etc.) constitutes.Can read information such as displacement, pressure on the controller display screen.
Step motor type pressure feedback multi-mode micromovement external fixator; Comprise two folder needle locks 18; It is characterized in that two folder needle locks 18 are connected with guide pillar 5, guide pin bushing 14 respectively; Sensor installation seat 8 on the guide pin bushing 14 is equipped with the pressure transducer 9 that can transmit signal to controller on the sensor holder 8, the ballscrew nut fitting 10 that is connected with the outfan of motor is installed on the pressure transducer 9.
The preferred DSP of controller, also can single-chip microcomputer or micro computer etc.
Have many use experiences with micro machine as sophisticated power executive component.It is little, in light weight to remove volume, also has noise little, easy to control, and precision is high, and low pressure, safety or the like advantage is widely used in all trades and professions.So the present invention adopts motor to drive ball guide screw nat and realizes straight reciprocating motion.The speed of control step motor and stroke can reach required frequency, amplitude requirement.Pressure limit 0-500N; Frequency range 0.25-5Hz; Amplitude 0.25-3mm.Three parameter index sectional combination in any.
When clinical assembling; When folder needle lock 18 connect squeeze into bone female thread pin or osseous pin after, screw in sphere universal joint 16, the matrix sphere of guide pillars and bushes seat 15 is matched with the sphere universal joint; And, guide pillar 5, guide pin bushing 14 are installed respectively then with the connection of side guide 17 usefulness bolts.Afterwards motor seat 2 and sensor holder 8 usefulness motor cabinet pressing plates 19 are connected with guide pillar, guide pin bushing respectively with sensor holder pressing plate 6 and bolt.Motor 1, setting pressure pick off 9 on sensor holder 8 are installed on motor seat 2.Ball guide screw nat 10 is installed, when the swing roller leading screw moves closer to step motor shaft, yielding coupling 4 is installed is connected with the output shaft of motor on pressure transducer 9.
When clinical practice, adopting pressurize earlier afterwards measures pressure measurement after deformation or the first deformation, and the mechanical property of acquisition bone stump in the judgement healing stage, gives mechanical stimulation scheme targetedly then.Except that the pattern that can adopt the control displacement is pressurizeed, also can adopt the pattern of controlled pressure to pressurize, the broken ends of fractured bone is applied dynamic pressure, avoid of the inhibition of knitting later stage displacement model to growth of spur.The equal scalable of the parameters of various stimulus modelities has realized the multiformity of mechanical stimulation mode, and realizes control automatically.
Claims (3)
1. step motor type pressure feedback multi-mode micromovement external fixator; Comprise two folder needle locks (18); It is characterized in that two folder needle locks (18) are connected with guide pillar (5), guide pin bushing (14) respectively, motor seat (2) is installed on the guide pillar (5), be used for fixing motor (1) by controller control; Guide pin bushing (14) is gone up sensor installation seat (8); The pressure transducer (9) that can transmit signal to controller is installed on the sensor holder (8), and pressure transducer (9) is gone up the ballscrew nut fitting (10) that is connected with the outfan of motor (1) is installed, and folder needle lock (18) is connected with guide pillar (5) guide pin bushing (14) respectively through sphere universal joint (16).
2. step motor type pressure feedback multi-mode micromovement external fixator according to claim 1 is characterized in that controller is DSP.
3. step motor type pressure feedback multi-mode micromovement external fixator according to claim 1 and 2 is characterized in that the outfan of motor (1) is connected through yielding coupling (4) with ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101065024A CN101803942B (en) | 2010-01-31 | 2010-01-31 | Step motor type pressure feedback multi-mode micromovement external fixator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101065024A CN101803942B (en) | 2010-01-31 | 2010-01-31 | Step motor type pressure feedback multi-mode micromovement external fixator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101803942A CN101803942A (en) | 2010-08-18 |
| CN101803942B true CN101803942B (en) | 2012-06-27 |
Family
ID=42606012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101065024A Expired - Fee Related CN101803942B (en) | 2010-01-31 | 2010-01-31 | Step motor type pressure feedback multi-mode micromovement external fixator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101803942B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105105834B (en) * | 2015-09-21 | 2017-08-25 | 河北工业大学 | A kind of Taylor Jia Gu rehabilitation institution |
| CN115919435B (en) * | 2023-03-02 | 2024-04-05 | 上海理工大学 | Intelligent constant control external fixation extension bracket |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615338A (en) * | 1985-09-18 | 1986-10-07 | Kurgansky Nauchno-Issledovatelsky Institut Experimentalnoi I Klinicheskoi Ortopedii I Travmatologii | Automatic compression-distraction apparatus |
| US5156605A (en) * | 1990-07-06 | 1992-10-20 | Autogenesis Corporation | Automatic internal compression-distraction-method and apparatus |
| DE20320663U1 (en) * | 2003-06-12 | 2004-11-25 | Spreehybrid & Kommunikationstechnik Gmbh | Electronically controllable external fixation for automated treatment of bone fracture points has a controlled drive unit with an integral force measurement unit for adjustment of the joining force at the fracture point |
| CN101234036A (en) * | 2008-01-10 | 2008-08-06 | 中国人民解放军第三军医大学第一附属医院 | Self-adjusting orthopaedics external fixing device |
| CN201135487Y (en) * | 2008-01-10 | 2008-10-22 | 中国人民解放军第三军医大学第一附属医院 | Stress checkout gear of wireless transmission signal for orthopaedics external fixture unit |
| CN201642277U (en) * | 2010-01-31 | 2010-11-24 | 李凯 | Stepping motor type pressure feedback multimode micromotion external fixing frame |
-
2010
- 2010-01-31 CN CN2010101065024A patent/CN101803942B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615338A (en) * | 1985-09-18 | 1986-10-07 | Kurgansky Nauchno-Issledovatelsky Institut Experimentalnoi I Klinicheskoi Ortopedii I Travmatologii | Automatic compression-distraction apparatus |
| US5156605A (en) * | 1990-07-06 | 1992-10-20 | Autogenesis Corporation | Automatic internal compression-distraction-method and apparatus |
| DE20320663U1 (en) * | 2003-06-12 | 2004-11-25 | Spreehybrid & Kommunikationstechnik Gmbh | Electronically controllable external fixation for automated treatment of bone fracture points has a controlled drive unit with an integral force measurement unit for adjustment of the joining force at the fracture point |
| CN101234036A (en) * | 2008-01-10 | 2008-08-06 | 中国人民解放军第三军医大学第一附属医院 | Self-adjusting orthopaedics external fixing device |
| CN201135487Y (en) * | 2008-01-10 | 2008-10-22 | 中国人民解放军第三军医大学第一附属医院 | Stress checkout gear of wireless transmission signal for orthopaedics external fixture unit |
| CN201642277U (en) * | 2010-01-31 | 2010-11-24 | 李凯 | Stepping motor type pressure feedback multimode micromotion external fixing frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101803942A (en) | 2010-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kitson et al. | A biomechanical comparison of locking plate and locking nail implants used for fractures of the proximal humerus | |
| CN101803942B (en) | Step motor type pressure feedback multi-mode micromovement external fixator | |
| CN110141354A (en) | A kind of Kirschner wire guider and its application method based on pediatric Orthopaedics operative treatment | |
| CN101797176B (en) | Pressure feedback multi-mode micro-motion external fixing frame | |
| CN201642279U (en) | Pressure feedback multimode jiggling external fixing frame | |
| CN201642277U (en) | Stepping motor type pressure feedback multimode micromotion external fixing frame | |
| CN103462708A (en) | Vibrator | |
| CN201519187U (en) | Locking compression bone plate | |
| CN101513359A (en) | Intelligent digital external fixed support for bone | |
| CN204092152U (en) | A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement | |
| Haug | Effect of screw number on reconstruction plating | |
| CN107616830A (en) | A kind of extension intramedullary needle for reducing pin hole | |
| CN206080668U (en) | But fixing system and pressure regulating hold -down bars in elasticity | |
| CN201683905U (en) | Ankle joint laxity determinator | |
| CN108685609A (en) | A kind of Combined type external fixed support and pressure-adjustable fixing device of novel adjustable pressure | |
| CN209847500U (en) | Radius ulna therapeutic equipment that looses | |
| CN203059887U (en) | Screw capable of mounting steel-wire cerclage simultaneously | |
| CN207855764U (en) | A kind of Combined type external fixed support and pressure-adjustable fixing device of novel adjustable pressure | |
| CN201755240U (en) | A novel orthopaedics screw tap | |
| CN202397640U (en) | Internal fixing device for constructing laboratory mouse femoral defect animal model | |
| CN201282996Y (en) | Clamp for fracture diaplasis | |
| CN201591618U (en) | Medical bone screw | |
| CN202446234U (en) | Fixing steel plate for curing fractures | |
| CN203841773U (en) | Adjustable pressure combined external fixator and adjustable pressure fixing arm | |
| CN202086566U (en) | Bone setting screw capable of connecting with steel wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20150131 |
|
| EXPY | Termination of patent right or utility model |