CN212729955U - Intramedullary nail distal hole positioning device - Google Patents
Intramedullary nail distal hole positioning device Download PDFInfo
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- CN212729955U CN212729955U CN202021650363.7U CN202021650363U CN212729955U CN 212729955 U CN212729955 U CN 212729955U CN 202021650363 U CN202021650363 U CN 202021650363U CN 212729955 U CN212729955 U CN 212729955U
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- intramedullary nail
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Abstract
The utility model discloses an intramedullary nail distal hole positioning device, which comprises an aiming bracket, a cable, an aiming device and an electric field inductor, wherein the aiming bracket, the cable, the aiming device and the electric field inductor are suitable for being connected with the proximal end of an intramedullary nail; the cable extends from the proximal end of the intramedullary nail into the intramedullary nail and to or beyond the distal hole of the intramedullary nail; an aiming device adjustably mounted on the aiming support for aiming the distal hole of the intramedullary nail; the electric field inductor is detachably installed in the sighting device and used for inducing the electric field of the cable. The intramedullary nail distal hole positioning device of the utility model is convenient for positioning the distal hole of the intramedullary nail, reduces the time for fixing the intramedullary nail and improves the success rate of fixing the intramedullary nail.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, specifically, relate to an intramedullary nail distal end hole positioner.
Background
When treating fracture, the intramedullary nail fixing technology is widely applied clinically, the installation of the distal locking nail of the intramedullary nail is a key link of the intramedullary nail fixing technology, and the accuracy of the positioning of the distal nail hole position of the intramedullary nail directly influences the operation quality.
In the related art, there are three main ways to determine the position of the distal nail hole of the intramedullary nail: firstly, the hole site is searched by means of X-ray imaging equipment in the operation, but the mode has high requirements on the operation experience of doctors, and X rays can generate a large amount of radiation to cause injury to medical staff and patients; secondly, a limiting and aiming technology of the positioning rod is adopted, but a drill hole needs to be added on the bone tissue in the mode, so that the operation steps are more, and extra trauma is also added to a patient; thirdly, a magnetic aiming and positioning technology is adopted, but in the operation drilling process, the drill bit slides and deviates due to the fact that the cutting edge of the drill bit is not sharp or the drilling speed is high, and the drilling direction is deviated.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, the embodiment of one aspect of the present invention provides a distal hole positioning device for intramedullary nail, which is convenient for positioning the distal hole of the intramedullary nail, reduces the time for fixing the intramedullary nail and improves the success rate of intramedullary nail fixation.
According to the utility model discloses intramedullary nail distal hole positioner, include: an aiming bracket adapted to be coupled to a proximal end of an intramedullary nail, a cable extending from the proximal end of the intramedullary nail into the intramedullary nail and to or beyond a distal bore of the intramedullary nail, an aimer adjustably mounted on the aiming bracket for aiming at the distal bore of the intramedullary nail, and an electric field sensor removably mounted within the aimer for sensing an electric field of the cable.
According to the utility model discloses intramedullary nail distal hole positioner, through the electric field that electric field inductor induction cable produced to the electric field region that the position induction play cable of adjusting the sight produced, through calculating the regional mid point of electric field, and adjust the sight to the mid point and realize aiming at the distal hole of sight and intramedullary nail, need not with the help of X-ray, and operating procedure is simple, is convenient for to intramedullary nail distal hole location, can reduce the fixed time of intramedullary nail, improves the fixed success rate of intramedullary nail.
In some embodiments, the aiming bracket is coupled to the proximal end of the intramedullary nail by a threaded interface.
In some embodiments, the intramedullary nail distal hole locating device further comprises an aiming adjuster mounted on the aiming bracket and for adjusting the aiming adjuster.
In some embodiments, an aiming scale is provided on the aiming support for indicating the position of the sight.
In some embodiments, the electric field sensor includes a housing, an induction coil for inducing an electric field generated by the cable, and a power supply and acquisition circuit disposed within the housing, the induction coil and power supply being coupled to the acquisition circuit.
In some embodiments, the electric field sensor further comprises an indicator for indicating an electric field generated by the induction coil sensing the cable.
In some embodiments, the sheath of the cable has a length scale value thereon for reading the extension of the cable into the intramedullary nail.
In some embodiments, the aiming support comprises a support frame and a swing rod, the support frame is suitable for being connected with the proximal end of the intramedullary nail, the swing rod is swingably supported by the support frame, the aiming device is installed at one end of the swing rod, the other end of the swing rod is hinged with the support frame, and a pressing hand wheel is installed on a pivot between the other end of the swing rod and the support frame.
Drawings
Fig. 1 is a schematic structural view of a distal hole positioning device for an intramedullary nail according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a method of using the intramedullary nail distal hole positioning device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the middle electric field inductor 5 of the intramedullary nail distal hole positioning device according to the embodiment of the present invention.
Fig. 4 is a schematic diagram showing the circuit distribution of the acquisition circuit in the middle electric field inductor of the intramedullary nail distal hole positioning device according to the embodiment of the present invention.
Reference numerals:
the device comprises a support frame 1, a swing rod 2, a cable 3, an aiming device 4, an electric field inductor 5, a shell 501, a power supply 502, an acquisition circuit 503, a field effect tube 5031, a resistor 5032, a triode 5033, a diode 5034, an induction coil 504, an indicator 505, a threaded interface 6, an aiming adjuster 7, a pressing hand wheel 8, an aiming scale 9, a fixing screw 10, an intramedullary nail 11, a distal hole 1101 and a support leg 12.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following describes the intramedullary nail distal hole positioning device according to an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the intramedullary nail distal hole positioning device according to the embodiment of the present invention includes an aiming bracket, a cable 3, an aiming device 4 and an electric field sensor 5. The aiming bracket is adapted to be connected to a proximal end of the intramedullary nail 11, and the cable 3 extends from the proximal end of the intramedullary nail 11 into the interior of the intramedullary nail 11 and to or beyond the distal hole 1101 of the intramedullary nail 11. As shown in fig. 1, the head of the cable 3 (the left end of the cable 3 in fig. 1) is located at or beyond the distal hole 1101 of the intramedullary nail 11. The sighting device 4 is adjustably mounted on the swing rod 2, as shown in fig. 1 and 2, the sighting device 4 is fixedly mounted on the swing rod 2 and vertically arranged in the up-down direction, the sighting device 4 is used for aiming at a distal hole 1101 of the intramedullary nail 11, and the electric field sensor 5 is detachably mounted in the sighting device 4 and used for sensing the electric field generated by the cable 3.
According to the utility model discloses intramedullary nail distal hole positioner, through the electric field that 5 induction cables 3 produced of electric field inductor, and adjust the electric field region that 3 produced of cable is gone out in the position response of sight 4, through calculating the mid point in electric field region, and adjust the sight to the mid point, thereby realize sight 4 and intramedullary nail 11's distal hole 1101 and aim at, need not with the help of X-ray, operating procedure is simple, be convenient for to intramedullary nail distal hole location, can reduce fixed time, the fixed success rate of intramedullary nail is improved.
In some embodiments, the aiming stand comprises a support frame 1 and a swing rod 2, the support frame 1 is suitable for being connected with the proximal end of an intramedullary nail 11, the swing rod 2 is swingably supported by the support frame 1, preferably, a support leg 12 for stabilizing the swing rod 2 is arranged on the swing rod, an aiming device 4 is arranged at one end of the swing rod 2, as shown in fig. 1, the aiming device 4 is arranged at the left end of the swing rod 2, the other end of the swing rod 2 is hinged with the support frame 1, the right end of the swing rod 2 is hinged with the support frame 1, a pressing hand wheel 8 is arranged on a pivot between the other end of the swing rod 2 and the support frame 1, namely, the pressing hand wheel 8 is arranged on a pivot between the right end of the swing rod 2 and the support frame 1, as shown in fig. 1 and 2, the pressing hand wheel 8 is loosened, the swing rod 2 can swing horizontally, the position of the sight 4 is then also fixed.
In some embodiments, the aiming bracket is coupled to the proximal end of the intramedullary nail 11 via the threaded interface 6, but the manner in which the aiming bracket is coupled to the proximal end of the intramedullary nail 11 is not so limited.
In some embodiments, the intramedullary nail distal hole positioning device further comprises an aiming adjuster 7 mounted on the aiming bracket and used for adjusting the aiming device 4, as shown in fig. 1, the aiming adjuster 7 is arranged at the hinge joint of the swing rod 2 and the supporting frame 1, and the aiming device 4 can horizontally swing around the aiming adjuster 7.
In some embodiments, the aiming scale 9 is provided on the aiming stand for indicating the position of the sight 4, and the aiming scale 9 can read the value of the angle through which the sight 4 swings.
In some embodiments, the electric field sensor 5 includes a housing 501, an induction coil 504 for sensing an electric field generated by the cable 3, and a power source 502 and a collection circuit 503 provided in the housing 501, the induction coil 504 and the power source 502 are connected to the collection circuit 503, the power source 502 supplies power to the collection circuit 503, as shown in fig. 3, the induction coil 504 is provided at a right end portion of the housing 501, and the induction coil 504 is disposed toward the cable 3 when the electric field sensor 5 is placed in the sight 4.
In some embodiments, the electric field inductor 5 further comprises an indicator 505 for indicating that the induction coil 504 induces the electric field generated by the cable 3. The induction coil 504 induces an electric field to cause the indicator 505 to respond, such as a buzzer sounding or a light lighting, but the type of the indicator 505 is not limited thereto.
In some embodiments, the sheath of the cable 3 has a scale of its length for reading the extension of the cable 3 into the intramedullary nail 11, by reading which it is known whether the location where the cable 3 extends from the proximal end of the intramedullary nail 11 into the intramedullary nail 11 extends to or beyond the distal hole 1101 of the intramedullary nail 11.
As shown in fig. 4, in some embodiments, the acquisition circuit 503 includes a field-effect transistor 5031, a resistor 5032, a transistor 5033, and a diode 5034, three pins of the field-effect transistor 5031 are respectively connected to the inductor 504, the resistor 5032, and the transistor 5033, the resistor 5032 is connected in series with the indicator 505 and then connected to the transistor 5033, one end of the diode 5034 is connected to the transistor 5033, and the other end of the diode 5034 is connected between the resistor 5032 and the field-effect transistor 5031, in other words, the diode 5034 is connected in parallel between the resistor 5032 and the indicator 505, when the acquisition circuit 503 is in a normal state, the field-effect transistor 5031 forms a leakage current due to the gate suspension, no current flows into the base of the transistor 5033, and. When the induction coil 504 induces the electric field of the cable, the induction coil 504 induces an alternating voltage to be applied to the gate of the fet 5031, the fet 5031 is turned off, the voltage of the power supply 502 is applied to the base of the transistor 5033 through the resistor 5032 and the diode 5033, the transistor 5033 is turned on, and the indicator 505 is in an operating state, i.e., the LED is on or the buzzer sounds. On the basis of the circuit, signal amplification and signal processing can be added, so that the electric field inductor 5 is more sensitive and accurate.
In some embodiments, the sheath of the cable 3 is an insulating layer, the cable 3 is connected to the live wire end of a power source, the power source is an ac power source, and optionally, the ac power source can use a safe voltage of 36V or less, and preferably, the voltage of the ac power source is 12V.
Some specific examples of intramedullary nail distal hole positioning devices of the present invention are described below with reference to fig. 1-3.
The intramedullary nail distal hole positioning device according to the specific example of the present invention comprises an aiming bracket, a cable 3, an aiming device 4 and an electric field sensor 5.
The aiming support comprises a support frame 1 and a swing rod 2, the right end of the support frame 1 is connected with the proximal end of an intramedullary nail 11 through a threaded interface 6, the left end of the support frame 1 is hinged with the right end of the swing rod 2, a cable 3 extends into the inside of the intramedullary nail 11 from the proximal end of the intramedullary nail 11 and extends to or exceeds a distal hole 1101 of the intramedullary nail 11, as shown in fig. 1, the head of the cable 3 is positioned at the distal hole 1101 of the intramedullary nail 11 or exceeds the position of the distal hole 1101, the head of the cable 3 is the left end of the cable 3, an aiming device 4 is adjustably installed on the swing rod 2, as shown in fig. 1 and 2, the aiming device 4 is fixedly installed on the swing rod 2 and vertically arranged along the up-down direction, the aiming device 4 is used for aiming at the distal hole 1101 of the intramedullary nail.
A pressing hand wheel 8 is arranged on a pivot between the right end of the swing rod 2 and the support frame 1, the pressing hand wheel 8 is loosened, the swing rod can horizontally swing around the pivot, the pressing hand wheel 8 is screwed, the position between the swing rod 2 and the support frame 1 is relatively fixed, namely the position of the swing rod 2 is locked by the pressing hand wheel 8, and the position of the sighting device 4 is fixed immediately.
Some specific examples of the method of using the intramedullary nail distal hole positioning device of the present invention are described below with reference to fig. 1 to 3.
Extending the cable 3 from a proximal end of the intramedullary nail 11 into the intramedullary nail 11 and to or beyond a distal hole 1101 of the intramedullary nail 11, supplying power to the cable 3 to cause the cable 3 to generate an electric field within the intramedullary nail 11, mounting an electric field sensor 5 within the aimer 4, detecting the electric field generated by the cable 3 with the electric field sensor 5, adjusting the position of the aimer 4, and recording an area where the electric field sensor 5 senses the electric field, calculating a midpoint of the electric field area, and adjusting the aimer 4 to the midpoint of the electric field area to cause the aimer 4 to be aligned with the distal hole 1101 of the intramedullary nail 11.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. An intramedullary nail distal hole positioning device, comprising:
an aiming bracket adapted to connect with a proximal end of an intramedullary nail;
a cable extending from a proximal end of the intramedullary nail into the intramedullary nail and to or beyond a distal hole of the intramedullary nail;
an aiming arm adjustably mounted on the aiming bracket for aiming at a distal hole of the intramedullary nail;
an electric field sensor removably mounted within the sight for sensing an electric field of the cable.
2. The intramedullary nail distal hole positioning device of claim 1, wherein the aiming bracket is connected to the proximal end of the intramedullary nail by a threaded interface.
3. The intramedullary nail distal hole positioning device of claim 1, further comprising an aiming adjuster mounted on the aiming bracket for adjusting the aiming arm.
4. The intramedullary nail distal hole positioning device of claim 3, wherein the aiming bracket is provided with an aiming scale for indicating the position of the aimer.
5. The intramedullary nail distal hole locating device according to any one of claims 1 to 4, wherein the electric field sensor comprises a housing, an induction coil for inducing an electric field generated by the cable, and a power supply and acquisition circuit disposed within the housing, the induction coil and power supply being connected to the acquisition circuit.
6. The intramedullary nail distal hole locating device of claim 5, wherein the electric field sensor further comprises an indicator for indicating an electric field induced by the induction coil to the cable.
7. The intramedullary nail distal hole locating device of claim 1, wherein the sheath of the cable has a length scale value thereon for reading the extension of the cable into the intramedullary nail.
8. The intramedullary nail distal hole positioning device according to claim 1, wherein the aiming support comprises a support frame and a swing rod, the support frame is suitable for being connected with the proximal end of the intramedullary nail, the swing rod is swingably supported by the support frame, the aiming device is installed at one end of the swing rod, the other end of the swing rod is hinged with the support frame, and a pressing hand wheel is installed on a pivot between the other end of the swing rod and the support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650363.7U CN212729955U (en) | 2020-08-10 | 2020-08-10 | Intramedullary nail distal hole positioning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650363.7U CN212729955U (en) | 2020-08-10 | 2020-08-10 | Intramedullary nail distal hole positioning device |
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| CN212729955U true CN212729955U (en) | 2021-03-19 |
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| CN202021650363.7U Active CN212729955U (en) | 2020-08-10 | 2020-08-10 | Intramedullary nail distal hole positioning device |
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