Intramedullary nail distal locking magnetic field guidance locator

Abstract

The utility model discloses a distal locking magnetic field guiding positioning instrument for intramedullary nail for leg bone repair, comprising: a detector, which comprises a detection sensor and a first data line, wherein the detection sensor is connected to the first data line; the detection sensor is a straight rod structure, the detector is inserted into the intramedullary nail, and enters the human leg along with the intramedullary nail; a magnetic field generator, comprising a V-shaped bracket, a pair of magnetic components and a signal transmitter, wherein: the V-shaped bracket comprises two fixing rods connected at the ends and separated at the front ends, and the front ends of the two fixing rods are respectively provided with a fixing hole; a positioning auxiliary piece is provided at the ends where the fixing rods are connected; the pair of magnetic components are respectively arranged in the fixing holes; the magnetic components generate a magnetic field at the front ends of the two fixing rods for detection by the detector; the signal transmitter is arranged in the V-shaped bracket, and the signal transmitter transmits a magnetic field generation control signal through the second data line; a signal processing and display unit is connected to the first data line and the second data line.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, and more specifically to a magnetic field guiding locator for locking the distal end of an intramedullary nail used in orthopedics. Background Art

[0002] At present, when repairing bone tissue in clinical practice, it is necessary to insert intramedullary nails into the bones. Especially when repairing bone tissue in the leg, it is necessary to drill holes in the humerus and hip bones for fixation. In this process, the position of the drill bit for bone drilling is very critical. The bone drilling must be completed accurately in one go, otherwise it will cause heat and necrosis of normal bones, or the drilling will be offset, resulting in unreliable fixation. In addition, doctors also need to work with the assistance of a CT machine and be exposed to X-rays for a long time.

[0003] The guides currently used in orthopedic surgery are not very accurate, which often leads to inaccurate positioning, affecting the surgical effect, causing inaccurate angles and positions of drilling and making it impossible to correctly insert the nails in one go. Utility Model Content

[0004] The present application proposes a magnetic field-guided locator for distal locking of an intramedullary nail, the purpose of which is to solve the problem in the prior art that drilling holes in bones requires the assistance of a CT machine and the drilling is not accurate.

[0005] In order to achieve the above technical solution, this application adopts the following technical means:

[0006] A magnetic field-guided locator for distal locking of intramedullary nails for leg bone repair, comprising: a detector, which comprises a detection sensor and a first data line, the detection sensor being connected to the first data line; the detection sensor being a straight rod structure, the detector being inserted into the intramedullary nail and entering the human leg along with the intramedullary nail; a magnetic field generator, comprising a V-shaped bracket, a pair of magnetic components and a signal transmitter, wherein: the V-shaped bracket comprises two fixing rods connected at the ends and separated at the front ends, the front ends of the two fixing rods being respectively provided with a fixing hole; a positioning auxiliary member being provided at the ends where the fixing rods are connected; the pair of magnetic components being respectively arranged in the fixing holes; the magnetic components generating a magnetic field at the front ends of the two fixing rods for detection by the detector; the signal transmitter being arranged in the V-shaped bracket, the signal transmitter transmitting a magnetic field generation control signal through the second data line; a signal processing and display unit, which is connected to the first data line and the second data line.

[0007] Preferably, the V-shaped bracket includes an outer shell and an inner shell, the inner shell is embedded in the outer shell, and the pair of magnetic components are fixed in two ends of the inner shell.

[0008] Preferably, the angle between the two fixing rods of the V-shaped bracket is between 110° and 150°.

[0009] Preferably, the positioning auxiliary component includes a first positioning structure provided on the outer shell and a second positioning structure provided on the inner shell; wherein: the first positioning structure is a hollow semicircular body, and a first positioning rod is arranged on the top of the hollow semicircular body; the second positioning structure is a semicircular body, and a second positioning rod is arranged on the top of the semicircular body; the second positioning structure is embedded in the first positioning structure, and the first positioning rod and the second positioning rod are staggered so as to be combined with the bone drill.

[0010] Preferably, the signal processing and display unit includes a signal processing unit and a display unit, the signal processing unit is connected to the first data line and the second data line, and processes the signal data transmitted by the first data line and the second data line, the signal processing unit is connected to the display unit, and the signal processing unit displays the processed data visually on the display unit.

[0011] Due to the adoption of the above technical solution, the present application uses a magnetic field generator to generate a magnetic field to guide the detector to find the precise position where a hole needs to be drilled, thereby achieving the purpose of precise positioning without the aid of a CT machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the exploded view of the V-shaped bracket of the present application. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0015] See also Figure 1 As shown, the distal locking magnetic field guidance positioning instrument for intramedullary nail for leg bone repair in this embodiment mainly includes a detector 1, a magnetic field generator 2 and a signal processing and display unit 3.

[0016] like Figure 1 The detector 1 is composed of a detection sensor 11 and a first data line 12. The detection sensor 11 is a straight rod structure, and the first data line 12 is connected to the detection sensor 11. When in use, the detector 1 is inserted into the intramedullary nail and enters the human leg along with the intramedullary nail. The detection sensor 11 is used to sense the external magnetic field and its intensity. The detection sensor 11 should be made of a metal material or alloy material that is not easily deformed. The first data line 12 is connected to the signal processing unit and the display unit 3.

[0017] The magnetic field generator 2 includes a V-shaped bracket 21, a pair of magnetic components 22 and a signal transmitter. The V-shaped bracket 21 is used to straddle the humerus or hip bone to generate a magnetic field on the front and back sides of the body. Figure 1 The V-shaped bracket 21 includes two fixing rods 211 connected at the ends and separated at the front ends. The front ends of the two fixing rods 211 are respectively provided with a fixing hole 212; a positioning auxiliary part 213 is provided at the ends connected to the fixing rods 211. The angle of the V-shaped bracket 21 should be selected to meet the position of the leg or even the waist. The angle between the two fixing rods of the V-shaped bracket is generally preferably 110°-150°, which can not only meet the span to meet the position of the leg or even the waist, but also ensure the best intensity of the magnetic field. A pair of magnetic components 22 (positive magnetic component and negative magnetic component) are fixed in the fixing hole 212 to generate a magnetic field. The signal transmitter is arranged in the V-shaped bracket, and the signal transmitter transmits the position signal to the signal processing and display unit through the second data line 23.

[0018] like Figure 2 As shown, the V-shaped bracket 21 includes an outer shell 215 and an inlay 214, and the inlay 214 is embedded in the outer shell 215. The positioning auxiliary part 213 includes a first positioning structure arranged on the outer shell 215 and a second positioning structure arranged on the inlay. Wherein: the first positioning structure is a hollow semicircular body 2131, and a first positioning rod 2132 is arranged on the top of the hollow semicircular body; the second positioning structure is a semicircular body 2133, and a second positioning rod 2134 is arranged on the top of the semicircular body 2133. The second positioning structure is embedded in the first positioning structure, and the first positioning rod 2132 and the second positioning rod 2134 are misaligned so as to be combined with the bone drill. The outer shell 215 is provided with a capacitor 216 for supplying power to the magnetic component 22, and a PCB board 217 connected to the two magnetic components.

[0019] The signal processing and display unit includes a signal processing unit and a display unit. The signal processing unit is connected to the first data line 13 and the second data line 23, and processes the data transmitted by the first data line 21 and the second data line 23. The signal processing unit determines the position information of the detection sensor 11 according to the strength of the magnetic field sensed by the detector. The specific algorithm of how to obtain the distance from the magnetic field source through the data of the sensor's induced magnetic field is a prior art and will not be repeated here. The signal processing unit is connected to the display unit, and the signal processing unit displays the processed data in a visual manner on the display unit. For example, the position signal transmitted by the second data line 23 is processed as an end point, and the position of the detection sensor 11 is determined according to the strength of the magnetic field sensed by the detection sensor, and the position of the detection sensor 11 is used as a moving point. The purpose of accurately determining the punching position is achieved by directly and intuitively observing the positions of the two on the display unit.

[0020] The distal locking magnetic field-guided locator for intramedullary nail for leg bone repair of the present application can complete precise drilling through the principle of magnetic induction in conjunction with an existing drill, is highly practical, and can avoid long-term exposure to X-rays when working with the assistance of a CT machine.

[0021] The above-described embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Equivalent changes and modifications made to the present invention by those skilled in the art should all fall within the scope of the claims attached to the present invention.

Claims

1. A magnetic field guided locator for distal locking of an intramedullary nail, characterized in that: include: The detector comprises a detection sensor and a first data line, wherein the detection sensor is connected to the first data line; the detection sensor is a straight rod structure, and the detector is inserted into the intramedullary nail and enters the human leg along with the intramedullary nail; A magnetic field generator comprises a V-shaped bracket, a pair of magnetic components and a signal transmitter, wherein: The V-shaped bracket includes two fixing rods connected at the ends and separated at the front ends, and the front ends of the two fixing rods are respectively provided with a fixing hole; a positioning auxiliary piece is provided at the ends where the fixing rods are connected; The pair of magnetic components are respectively arranged in the fixing holes; the magnetic components generate a magnetic field at the front ends of the two fixing rods for detection by the detector; The signal transmitter is arranged in the V-shaped bracket, and the signal transmitter transmits a magnetic field generation control signal through a second data line; The signal processing and display unit is connected to the first data line and the second data line.

2. The intramedullary nail distal locking magnetic field guidance locator according to claim 1, characterized in that: The V-shaped bracket comprises an outer shell and an inner shell, wherein the inner shell is embedded in the outer shell, and the pair of magnetic components are fixed in two ends of the inner shell.

3. The intramedullary nail distal locking magnetic field guidance locator according to claim 2, characterized in that: The angle between the two fixing rods of the V-shaped bracket is between 110° and 150°.

4. The intramedullary nail distal locking magnetic field guidance locator according to claim 2, characterized in that: The positioning auxiliary component includes a first positioning structure provided on the outer shell and a second positioning structure provided on the inner shell; wherein: The first positioning structure is a hollow semicircular body, and a first positioning rod is arranged on the top of the hollow semicircular body; The second positioning structure is a semicircular body, and a second positioning rod is arranged on the top of the semicircular body; The second positioning structure is embedded in the first positioning structure, and the first positioning rod and the second positioning rod are staggered so as to be combined with a bone drill.

5. The intramedullary nail distal locking magnetic field guidance locator according to claim 1, characterized in that: The signal processing and display unit includes a signal processing unit and a display unit. The signal processing unit is connected to the first data line and the second data line, and processes the data transmitted by the first data line and the second data line. The signal processing unit is connected to the display unit, and the signal processing unit displays the processed data visually on the display unit.

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