CN112244976A - Pre-stored energy type wireless electronic control extension intramedullary needle - Google Patents
Pre-stored energy type wireless electronic control extension intramedullary needle Download PDFInfo
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- CN112244976A CN112244976A CN202011137237.6A CN202011137237A CN112244976A CN 112244976 A CN112244976 A CN 112244976A CN 202011137237 A CN202011137237 A CN 202011137237A CN 112244976 A CN112244976 A CN 112244976A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
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Abstract
The invention provides a pre-stored energy type wireless electric control extension intramedullary pin, which comprises the following components in sequential connection: the front positioning section comprises a hollow front pipe and a front fixing rod arranged in the front pipe; the back location section, including the back pipe, be provided with the back connecting hole in the one end of back pipe, and install in proper order in the back pipe: the extension pipe, the axial driving rod and the reduction box; a drive motor; the signal receiver comprises an induction coil, an internal control chip for receiving and processing external signals and a lead for connecting the induction coil and the driving motor; and the signal transmitter comprises a transmitting coil and an external control chip for controlling the action of the driving motor through the transmitting coil. The invention realizes the medical function of the intramedullary prolongable intramedullary nail capable of satisfying fracture repair and deformity correction, solves the key problems of large requirement, monitoring, excessive or insufficient extension and the like of the prolongable intramedullary nail driving load, and has the advantages of accurate detection of displacement extension, automatic measurement and control of extension amount and small driving load.
Description
Technical Field
The invention relates to the field of medical orthopedics, in particular to an electrically controlled extension intramedullary pin which has a pre-energy storage effect and can be wirelessly controlled and is used in fracture repair and deformity correction.
Background
The prolongable intramedullary nail is mainly used for treating limb long bone fracture, brittle bone disease and ceramic doll of patients with osteogenesis imperfecta, and repairing and correcting deformity of fracture. In the current treatment methods other than the above, an external stent fixation method is used, which requires a plurality of steel needles to enter the bone through the skin, causing great pain and possibly causing infection and other problems; the inner and outer shape fixing method may cause uneven growth of new bone.
The intramedullary pin can be prolonged as the most advanced technology in the lower limb lengthening apparatus. It is similar to other limb implanting supports, is matched with the implanting position, has no external support, reduces the pain of the patient, and is stable after the operation. The method is a treatment method with high technical content, but has the problems of difficult monitoring, excessive or insufficient elongation and the like in use, and the requirement on the driving load of the existing intramedullary needle is large, so that the sustainable operation time in driving and the power and space parameters of the model selection of the motor are influenced.
Disclosure of Invention
The invention aims to provide an electric control extension intramedullary needle which has a pre-energy storage effect and can be wirelessly controlled and is used in fracture repair and deformity correction.
Specifically, the invention provides a pre-stored energy type wireless electronic control extension intramedullary pin, which comprises the following components in sequential connection:
the front positioning section comprises a hollow front pipe with internal threads and a front fixing rod arranged in the front pipe, one end of the front fixing rod is provided with a front connecting hole for a medical nail to pass through, and the other end of the front fixing rod is provided with a rotary groove convenient to clamp;
the back location section, include the back pipe through spiro union in one end and the front tube, the one end of keeping away from the front tube at the back pipe is provided with the back connecting hole, and installs in proper order at the back intraductal:
the extension pipe is a hollow pipe with an axial key groove in the inner surface, one end of the extension pipe is screwed into the front pipe through threads, and the screwed end is clamped with the rotary groove of the front fixing rod through a clamping structure;
the axial driving rod is inserted into the extension pipe, and an axial convex key matched with the axial key hole is arranged on the outer surface of the axial driving rod;
a reduction gearbox; the rotating speed of the driving motor is adjusted;
the driving motor is connected with the reduction gearbox, and an output shaft is connected with the axial driving rod;
the signal receiver comprises an induction coil for providing power for the driving motor, an internal control chip for receiving and processing external signals, and a lead for connecting the induction coil and the driving motor;
and the signal transmitter comprises a transmitting coil for providing energy for the induction coil and receiving and transmitting signals, and an external control chip for controlling the action of the driving motor through the transmitting coil.
The intramedullary lengthening intramedullary nail realizes the medical functions of the intramedullary lengthening intramedullary nail for repairing and correcting the deformity, solves the key problems of large requirement, monitoring, excessive or insufficient extension and the like of the extendable intramedullary nail driving load, and has the advantages of accurate detection of displacement extension, automatic measurement and control of the extension amount and small driving load. The operation is simple, and doctors or patients can operate the device well, scientifically and effectively.
Drawings
FIG. 1 is a schematic view of an intramedullary pin according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the front tube structure of FIG. 1;
FIG. 3 is a schematic diagram of the front fixing rod of FIG. 1;
FIG. 4 is a cross-sectional view of the rear tube structure of FIG. 1;
FIG. 5 is a schematic diagram of the connection between the driving device and the signal receiver in FIG. 1;
fig. 6 is a schematic diagram of a signal transmitter according to an embodiment of the present invention.
Detailed Description
The detailed structure and implementation process of the present solution are described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, in one embodiment of the present invention, a pre-stored wireless electrically controlled extension intramedullary pin is disclosed, which comprises a front positioning section 1, a rear positioning section 2, a signal receiver 41 and a signal transmitter 42 connected in sequence.
The front positioning section 1 is used for being fixed at one end of a repair point to be repaired or corrected, and comprises a hollow front tube 12 with internal threads 121 and a front fixing rod 11 arranged in the front tube 12 as shown in fig. 2, wherein one end of the front fixing rod 11 is provided with a front connecting hole 111 for a medical nail to pass through, and the other end is provided with a rotary groove 112 convenient to clamp; the front fixing rod 11 is axially movable in the head tube 12, and one end of a front coupling hole 111 thereof is protruded from the front end of the head tube 12. One end of the rotary groove 112 of the front fixing rod 11 needs to bear the axial tension and compression load in the daily life after the operation of the patient, so as to meet the mechanical function requirement of the treatment. For example, when the patient stands, the intramedullary needle is loaded by pressure in the shortening direction, the front fixing rod 11 has the tendency of shortening backwards, and the stress surface is the surface of the rotary groove 112 which bears the front section compression force; similarly, when the patient lifts the leg, the front fixing rod 11 lifts the weight of the whole lower half section of the bone limb and has a forward extending movement trend, and the stress surface is the groove surface of the front fixing rod 11 connected with the rotary groove 112.
The rear positioning section 2 is used for being fixed at the other end of a repair point to be repaired or corrected, and comprises a rear pipe 21 with one end screwed with the front pipe 12, a rear connecting hole 211 is arranged at one end of the rear pipe 21 far away from the front pipe 12, and an extension pipe 25, an axial driving rod 31, a reduction gearbox 33 and a driving motor 32 are sequentially arranged in the rear pipe 21 as shown in fig. 4;
as shown in fig. 5, the extension tube 25 is a hollow tube, the inner surface of which is provided with an axial keyway, one end of which is screwed into one end of the front tube 12 through an external thread 251, and the screwed end is clamped with the rotary groove 112 of the front fixing rod 11 by a clamping structure 252; after the end of the extension tube 25 contacting with the front fixing rod 11 is clamped, the axial movement of the extension tube 25 can push the front fixing rod 11 to move axially in the front tube 12, but the radial rotation of the extension tube 25 cannot drive the front fixing rod 11 to rotate radially.
Wherein the drive means 3 drive the elongated tube 25 in rotation via the intermediate piece; the driving device 3 needs to have a function of transmitting a signal to the outside and receiving an external control signal to control the rotation angle. The present embodiment discloses a driving device 3, which has the following structure: an axial driving rod 31, a reduction box 33 and a driving motor 32;
the axial driving rod 31 is of equal length to the extension tube 25, is inserted into the extension tube 25, and is provided on its outer surface with an axial male key 311 cooperating with the axial keyway.
The driving motor 32 is arranged in the motor clamping groove 24 in the rear tube 21, the input shaft of the reduction gearbox 33 is connected with the driving motor 32, and the output shaft of the reduction gearbox 33 is connected with the axial driving rod 31 and used for providing power for driving the front fixing rod 11 to stretch. The reduction ratio of the reduction gearbox 33 can be 100-1000, and the reduction gearbox is fixedly connected with the driving motor 32.
Further, an energy storage spring (not shown) for reducing the load of the driving motor 32 may be mounted on the output shaft of the reduction gear box 33, the energy storage spring may be one of a torsion spring, a leaf spring and a coil spring, and the energy storage spring may be mounted in the reduction gear box 33 or on a stopper 23 described later. The energy storage spring is in a tight energy storage state when the intramedullary nail is initially installed, and the torque of the energy storage spring has a tendency of enabling the axial driving rod 31 to rotate towards the treatment direction, so that additional power can be provided when the driving motor 32 drives, and the technical effects of reducing the driving load of the driving motor 32 and prolonging the control time are achieved.
The signal control device 4 includes a signal receiver 41 and a signal transmitter 42.
The signal receiver 41 is implanted under the skin of the affected part of the human body, receives the energy transmitted in an infinite manner, and transmits the driving energy to the driving motor 32 while collecting the angle signal of the movement of the driving motor 32; includes an induction coil 412 for supplying power to the driving motor 32, an internal control chip 413 for receiving and processing external signals, and a lead 411 for connecting the induction coil 412 and the driving motor 32.
As shown in fig. 6, the signal transmitter 42 is independently located outside the human body, and is used for controlling the driving motor 32 in the intramedullary nail, detecting the elongation of the intramedullary nail, performing feedback adjustment on data, and completing the control function of automatic measurement and control extension. Includes a transmitter coil 422 for providing power to the induction coil 412 and receiving signals, and an external control chip 423 for controlling the operation of the driving motor 32 via the transmitter coil 422. The external control chip 423 can receive and process the signal of the internal control chip 413, is provided with a power supply 424, and can detect the elongation of the intramedullary needle according to the angle signal of the movement of the driving motor 32, and simultaneously control the movement of the driving motor 32 quantitatively in time according to the treatment requirement and the program setting, so as to achieve the functions of accurately detecting the elongation displacement of the intramedullary needle and automatically measuring and controlling the elongation.
When the embodiment is used, the front positioning section 1 and the rear positioning section 2 are connected together through the threads 22 and are embedded in a bone to be repaired of a human body, the transmitting coil 422 is attached to the induction coil 412 embedded in the human body, and the external control chip 423 transmits energy to the signal receiver 41 through the transmitting coil 422 in an electromagnetic induction wireless mode. The induction coil 412 of the signal receiver 41 collects and stores the received energy, and the internal control chip 413 drives the driving motor 32 according to the program transmitted by the external control chip 423.
The output shaft of the driving motor 32 drives the axial driving rod 31 to rotate through the reduction box 33, the axial driving rod 31 drives the extension tube 25 to rotate through the axial convex key 331 on the outer surface, one end of the extension tube 25 screwed into the front tube 12 axially advances along the interior of the front tube 12 under the control of the thread 121, and then the connected front fixing rod 11 is pushed to axially move in the front tube 12, one end of the front fixing rod 11 with the connecting hole 111 extends out of the front tube 12, when reaching the corresponding intramedullary needle fixing point, a medical nail penetrates through the connecting hole 111 to fix the front fixing rod 11 with the bone, and then the medical nail penetrates through the connecting hole 211 on the rear tube 21 to fix the rear tube 21 at the corresponding fixing point.
The number, spatial arrangement, aperture size, and diameter variation of the medical nail positioning connection holes 111 and 211 can be adjusted according to the bone structure of the patient. In the present embodiment, two connection holes 111 are provided in the front fixing rod 11 in the axial direction, and one connection hole 211 is provided in the rear pipe 21.
At this time, the whole intramedullary needle is positioned in a specified length. In the process, the reduction box 33 can control the rotation speed of the driving motor 32, and after the front fixing rod 11 and the rear tube 21 are fixed, the resistance torque provided by the reduction box 33 is used for preventing the axial driving rod 31 from rotating, so that the intramedullary needle is kept at the current length.
In the treatment process of the intramedullary nail, the external control chip 423 monitors the elongation in real time, and carries out closed-loop feedback adjustment according to the elongation speed and elongation parameters set by a program, thereby realizing the function of automatic measurement and control of the elongation. The control of the elongation rate is performed during treatment according to the requirements of the physician. The thread structure of the connecting of the extension tube and the inner tube of the intramedullary needle needs to meet the result requirement of the formula.
The embodiment realizes the medical functions of the intramedullary nail capable of prolonging in marrow of fracture repair and deformity correction, solves the key problems that the intramedullary nail capable of prolonging is difficult to monitor, and the elongation is excessive or insufficient, and has the advantages of accurately detecting displacement elongation and automatically measuring and controlling the elongation. The operation is simple, and doctors or patients can operate the device well, scientifically and effectively.
In one embodiment of the present invention, in order to prevent the front fixing rod 11 from rotating during the movement, an axial stopper groove 122 is formed on the inner surface of the front pipe 12, and a stopper key 113 corresponding to the stopper groove 122 is formed on the shaft of the front fixing rod 11. The limiting groove 113 is used to limit the axial rotational freedom of the front fixing rod 11 so as to prevent the relative rotation between the front fixing rod 11 and the rear tube 21, thereby affecting the bone healing process, which is also the part to be limited during the treatment. In addition, the limiting key 113 can also realize the positioning and guiding function of the front fixing rod 11 in the extending process of the front tube 12, reduce the resistance in the extending and sliding process and make the front fixing rod smooth.
Preferably, the limit keys 113 on the front fixing rod 11 are arranged at one end connected with the extension pipe 25, and the limit keys 113 are provided with four paths and are uniformly distributed along the circumference; the retaining grooves 122 in the head tube 12 extend through the internal threaded section 121 in a number and location corresponding to the number and location of the retaining keys 113. The height of the limit key 113 may be 1mm, the width 2mm, and the key length 10 mm.
Further, a protection section 123 closely attached to the front fixing rod 11 may be provided on an inner surface of the front pipe 12 corresponding to an end of the front fixing rod 11 from which the front fixing rod 11 extends. Under the structure, the rear section of the front fixing rod 11 is jointed with the limiting groove 122 in the front tube 12 through the limiting key 113, the front section is jointed with the protection section 123, the jointing assembly of the two parts can enable the front fixing rod 11 to bear bending moment load in daily life after operation of a patient, meanwhile, the threads 121 in the front tube 12 can be prevented from being scratched by the front fixing rod 11, and the effect of protecting the threads 121 and the sealing effect required by implant in vivo are achieved. With this structure, the stopper groove 113 is terminated at the protecting section 123 and is blocked by the protecting section 123, so that the front fixing rod 11 can be prevented from being excessively extended to slide out of the front pipe 12.
In an embodiment of the present invention, the driving motor 32 is a low voltage dc motor, and an angle sensor is disposed inside the driving motor 32 for detecting a rotation angle of the driving motor 32, and feeding back a movement angle signal of the driving motor 32 to the external control chip 423 through the internal control chip 413. A stop 23 is arranged between the axial driving rod 31 and the gear box 33 for preventing the extension pipe 25 from passing through axially, and the stop 23 can be used for preventing the thread of the extension pipe 25 from slipping and then penetrating the whole device reversely, and simultaneously preventing the axial driving rod 31 from retreating under pressure.
In one embodiment of the present invention, the number, spatial arrangement, aperture size, front end elongation, type selection of the driving motor 32 and the reduction gearbox 33, and the like of the medical nail positioning connection holes 111 and 211 at the front and rear sections of the intramedullary needle are determined according to the disease focus condition of the patient for fracture repair and deformity correction.
The transmitting coil 422 of the signal transmitter 42 needs to be matched with the induction coil 412 of the signal receiver 41 implanted in the subcutaneous shallow layer, so that the centers of the coils are aligned, and the transmitting coil 422 is tightly attached to the induction coil 412 and fixed on the skin by medical adhesive tape so as to prevent the skin from falling off in the treatment process. Wherein the transmitting coil 422 is connected to the power source 424 through the conducting wire 421, and the induction coil 412 is connected to the driving motor 32 through the conducting wire 411.
The adjustment of the intramedullary needle adopts a single adjustment mode, the elongation and the elongation treatment program are set once each time, and then the next adjustment is carried out according to the situation.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. The utility model provides a pre-energy storage formula wireless control extension intramedullary pin which characterized in that, including connecting gradually:
the front positioning section comprises a hollow front pipe with internal threads and a front fixing rod arranged in the front pipe, one end of the front fixing rod is provided with a front connecting hole for a medical nail to pass through, and the other end of the front fixing rod is provided with a rotary groove convenient to clamp;
the back location section, include the back pipe through spiro union in one end and the front tube, the one end of keeping away from the front tube at the back pipe is provided with the back connecting hole, and installs in proper order at the back intraductal:
the extension pipe is a hollow pipe with an axial key groove in the inner surface, one end of the extension pipe is screwed into the front pipe through threads, and the screwed end is clamped with the rotary groove of the front fixing rod through a clamping structure;
the axial driving rod is inserted into the extension pipe, and an axial convex key matched with the axial key hole is arranged on the outer surface of the axial driving rod;
a reduction gearbox; the rotating speed of the driving motor is adjusted;
the driving motor is connected with the reduction gearbox, and an output shaft is connected with the axial driving rod;
the signal receiver comprises an induction coil for providing power for the driving motor, an internal control chip for receiving and processing external signals, and a lead for connecting the induction coil and the driving motor;
and the signal transmitter comprises a transmitting coil for providing energy for the induction coil and receiving and transmitting signals, and an external control chip for controlling the action of the driving motor through the transmitting coil.
2. The intramedullary needle of claim 1,
the inner surface of the front pipe is provided with an axial limiting groove, and a rod body of the front fixed rod is provided with a limiting key corresponding to the limiting groove.
3. The intramedullary needle of claim 2,
the limiting keys on the front fixing rod are arranged at one end connected with the axial driving rod, and four limiting keys are arranged and uniformly distributed along the circumference; the limiting grooves in the front pipe penetrate through the internal thread section, and the number and the positions of the limiting grooves correspond to those of the limiting keys.
4. The intramedullary needle of claim 3,
and a protection section which is jointed with the rod body of the front fixing rod is arranged on the inner surface of the front tube corresponding to the extending end of the front fixing rod.
5. The intramedullary needle of claim 1,
the driving motor is a low-voltage direct current motor, and an angle sensor is arranged in the driving motor and used for detecting the rotation angle of the driving motor.
6. The intramedullary needle of claim 5,
and a stop block for preventing the extension pipe and the axial driving rod from passing through is arranged between the axial driving rod and the gearbox.
7. The intramedullary needle of claim 1,
after the end, in contact with the front fixing rod, of the extension pipe is clamped, the axial movement of the extension pipe pushes the front fixing rod to move axially, but the radial rotation of the extension pipe cannot drive the front fixing rod to rotate radially.
8. The intramedullary needle of claim 1,
the variable diameters of the front fixing rod and the rear tube, the number of the connecting holes on the front fixing rod and the rear tube, the spatial position arrangement and the aperture size are adjusted according to the bone structure of a patient.
9. The intramedullary needle of claim 1,
the front positioning section and the rear positioning section are cylindrical with the same diameter.
10. The intramedullary needle of claim 1,
an energy storage spring for reducing the load of the driving motor is mounted on an output shaft of the reduction gearbox, and the energy storage spring is one of a torsion spring, a plate spring or a coil spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011137237.6A CN112244976A (en) | 2020-10-22 | 2020-10-22 | Pre-stored energy type wireless electronic control extension intramedullary needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011137237.6A CN112244976A (en) | 2020-10-22 | 2020-10-22 | Pre-stored energy type wireless electronic control extension intramedullary needle |
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| Publication Number | Publication Date |
|---|---|
| CN112244976A true CN112244976A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011137237.6A Pending CN112244976A (en) | 2020-10-22 | 2020-10-22 | Pre-stored energy type wireless electronic control extension intramedullary needle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2829652Y (en) * | 2005-08-17 | 2006-10-25 | 丁大法 | Combined intramedullary pin with lock |
| CN101734007A (en) * | 2008-11-14 | 2010-06-16 | 浙江大学 | Device for reducing inertia load impact excitation of high-speed automatic die cutting and hot stamping machine |
| CN102271601A (en) * | 2008-10-31 | 2011-12-07 | 米卢克斯控股股份有限公司 | Device and method for bone adjustment operating with wireless transmission energy |
| CN104173097A (en) * | 2014-07-21 | 2014-12-03 | 阮玉德 | Intramedullary nail |
| CN107693099A (en) * | 2017-10-31 | 2018-02-16 | 成都融创智谷科技有限公司 | It is a kind of efficiently to extend intramedullary needle |
| CN209669739U (en) * | 2018-11-15 | 2019-11-22 | 江阴市艾迪电器科技有限公司 | Cone extension and retraction system energy pre-storage mechanism |
-
2020
- 2020-10-22 CN CN202011137237.6A patent/CN112244976A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2829652Y (en) * | 2005-08-17 | 2006-10-25 | 丁大法 | Combined intramedullary pin with lock |
| CN102271601A (en) * | 2008-10-31 | 2011-12-07 | 米卢克斯控股股份有限公司 | Device and method for bone adjustment operating with wireless transmission energy |
| CN105943145A (en) * | 2008-10-31 | 2016-09-21 | 米卢克斯控股股份有限公司 | Device and method for bone adjustment operating with wireless transmission energy |
| CN101734007A (en) * | 2008-11-14 | 2010-06-16 | 浙江大学 | Device for reducing inertia load impact excitation of high-speed automatic die cutting and hot stamping machine |
| CN104173097A (en) * | 2014-07-21 | 2014-12-03 | 阮玉德 | Intramedullary nail |
| CN107693099A (en) * | 2017-10-31 | 2018-02-16 | 成都融创智谷科技有限公司 | It is a kind of efficiently to extend intramedullary needle |
| CN209669739U (en) * | 2018-11-15 | 2019-11-22 | 江阴市艾迪电器科技有限公司 | Cone extension and retraction system energy pre-storage mechanism |
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