Adjustable tibia intramedullary nail knee bending body position device

Abstract

The utility model provides an adjustable tibia intramedullary nail knee bending body position device, and relates to the technical field of medical instruments. The bottom plate is rotationally connected with at least two threaded rods, and the outer sides of the threaded rods are connected with sliding pieces through threads respectively; the sliding piece moves in the axial direction of the threaded rod. The connecting rods are of telescopic structures, and the supporting piece is movably connected with the sliding piece and the bottom plate through the at least three connecting rods respectively; when the threaded rod drives the sliding part to displace, the supporting part is pushed by the connecting rod to displace, so that the height and the angle of the supporting part and the bottom plate are changed, and the problems that when an existing knee bending body position device is used, due to the fact that the adjusting angle of the body position device is relatively limited, the knee bending body position is inconvenient to accurately adjust for different patients when the tibia of the patient is supported; and the problem that the position of a patient is placed incorrectly in an operation and the guide needle of the tibia intramedullary nail is difficult to place is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to an adjustable tibial intramedullary nail knee-flexion positioner. Background Art

[0002] Tibial fractures are the most common fractures in human body fractures. The most commonly used method for treating tibial fractures is open reduction and internal fixation. This method mainly involves incising the skin and muscles and other soft tissues at the affected area to expose the bone, and performing an operation to reduce fractures and dislocations under direct vision; at the same time of open reduction, internal fixation devices are installed into the patient's body to fix the fracture ends.

[0003] The grooving position for open reduction and internal fixation must be correct. When the grooving position is too anterior, it is easy to cause tibial tubercle splitting; when the grooving position is too inferior and the fracture position is relatively high, it is easy to cause splitting of one side of the bone cortex. When driving in rectangular nails, it is best to drive in two rectangular nails simultaneously, or alternately on both sides, without allowing the two nails to cross in the medullary cavity, otherwise it is difficult to insert. Therefore, the position of the patient's body position during grooving is particularly crucial. When the existing knee-flexion positioner is in use, due to the relatively limited adjustable angle of the positioner, it is not convenient to accurately adjust the knee-flexion position for different patients when supporting the patient's tibia, which easily leads to incorrect placement of the patient's body position during the operation and makes it difficult to insert the tibial intramedullary nail guide needle.

[0004] The utility model aims at the above problems and provides an adjustable tibial intramedullary nail knee-flexion positioner. Content of the Utility Model

[0005] The utility model provides an adjustable tibial intramedullary nail knee-flexion positioner, which specifically includes:

[0006] A support member; a bottom plate rotatably connected with at least two threaded rods, and sliding members are respectively connected to the outer sides of the threaded rods through threads; the sliding members move along the axial direction of the threaded rods; at least three connecting rods, the connecting rods are telescopic structures, and the support member is movably connected to the sliding members and the bottom plate respectively through at least three connecting rods; when the threaded rods drive the sliding members to displace, the support member is pushed to generate displacement through the connecting rods, so that the height and angle between the support member and the bottom plate are changed.

[0007] Preferably, at least one joint socket A is provided at the upper end of the bottom plate; a joint socket B is provided at the upper end of the sliding member; at least three joint sockets C are provided at the lower end of the support member.

[0008] Preferably, joint heads are provided at both ends of the connecting rod, and the joint socket A and the joint socket C, and the joint socket B and the joint socket C are respectively connected through the joint heads of the connecting rod.

[0009] Preferably, screw holes are formed in the glenoid fossae A, B, and C, and locking screws are inserted into the screw holes.

[0010] Preferably, one end of the threaded rod is provided with a through hole longitudinally penetrating the threaded rod, and a wrench is inserted into the through hole.

[0011] Preferably, a detachable transmission member is sleeved on one end of the threaded rod; at least two of the threaded rods are connected by the transmission member and rotate in the same direction.

[0012] Preferably, a fixing member is fixedly connected to the lower end of the bottom plate, and the fixing member is an elastic clip.

[0013] Preferably, the support member is made of a flexible material, and a metal bracket is provided inside the support member.

[0014] Advantageous Effects

[0015] In the present utility model, when the threaded rod rotates, the sliding member moves axially along the threaded rod through cooperation with the threaded rod. When the two sliding members displace synchronously, by changing the length and angle of the connecting rod, the height of the support member supported by the connecting rod changes. If there is a distance difference between the displacements of the two sliding members, the changes in the length and angle generated by the two connecting rods are different, which will cause the support member to change in angle compared to its initial position. Therefore, compared with the existing body positioner, the instrument is more flexible in adjusting the body position angle, has a wider adaptability, and can meet the needs of different patients in the knee-flexed body position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present utility model and do not limit the present utility model.

[0018] In the drawings:

[0019] Figure 1 Shows a schematic three-dimensional structure diagram of the overall adjustable knee-flexed body positioner according to an embodiment of the present utility model.

[0020] Figure 2 Shows an assembly diagram of the slider and the bottom plate of the adjustable knee-flexed body positioner according to an embodiment of the present utility model.

[0021] Figure 3 Shows an assembly diagram of the support member and the slider of the adjustable knee-flexed body positioner according to an embodiment of the present utility model.

[0022] Figure 4Shows the assembly drawing of the support member and the bottom plate of the adjustable knee-flexion body positioner according to an embodiment of the present invention.

[0023] Figure 5 Shows the assembly drawing of the bottom plate of the adjustable knee-flexion body positioner according to an embodiment of the present invention.

[0024] List of main reference numerals

[0025] 101, bottom plate; 102, threaded rod; 103, articular fossa A; 104, wrench; 105, fixing member; 106, transmission member;

[0026] 201, sliding member; 202, articular fossa B;

[0027] 3, locking screw;

[0028] 401, support member; 402, articular fossa C;

[0029] 5, connecting rod. Detailed implementation manners

[0030] In order to make the purpose, solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention.

[0031] Embodiment: Please refer to Figures 1 to 5 :

[0032] The present invention provides an adjustable tibial intramedullary nail knee-flexion body positioner, comprising:

[0033] Support member 401; bottom plate 101, rotatably connected with at least two threaded rods 102, and the outer sides of the threaded rods 102 are respectively connected with sliding members 201 through threads; the sliding members 201 move along the axial direction of the threaded rods 102; there are at least three connecting rods 5, the connecting rods 5 are telescopic structures, and the support member 401 is movably connected with the sliding members 201 and the bottom plate 101 respectively through at least three connecting rods 5; when the threaded rods 102 drive the sliding members 201 to displace, the support member 401 is pushed to generate displacement through the connecting rods 5, so that the height and angle between the support member 401 and the bottom plate 101 are changed; when the threaded rods 102 rotate, the sliding members 201 move along the axial direction of the threaded rods 102 through the cooperation with the threaded rods 102. When the two sliding members 201 displace synchronously, by changing the length and angle of the connecting rods 5, the height of the support member 401 supported by the connecting rods 5 is changed. If there is a distance difference between the displacements of the two sliding members 201, the changes in the length and angle generated by the two connecting rods 5 are different, which will cause a change in the angle of the support member 401 compared with the initial position. Therefore, compared with the existing body positioner, this instrument is more flexible in adjusting the body position angle, has a wider adaptability, and can meet the needs of different patients' knee-flexed body positions; at the same time, using the threaded rods 102 as the drive, the adjustment accuracy is higher, and after the adjustment is completed, the stability of the support member 401 is better, which can effectively prevent the body position of the patient from changing during the operation.

[0034] Among them, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, at least one joint socket A103 is provided at the upper end of the bottom plate 101; a joint socket B202 is provided at the upper end of the sliding member 201; at least three joint sockets C402 are provided at the lower end of the support member 401; through the connection of the joint head and the joint socket, the connection between the bottom plate 101, the sliding member 201 and the support member 401 has a larger range of movement, so that the angle adjustment range of the support member 401 is larger.

[0035] Among them, as Figure 3 and Figure 4 shown, joint heads are provided at both ends of the connecting rod 5, and the joint heads of the connecting rod 5 are respectively connected between the joint socket A103 and the joint socket C402, and between the joint socket B202 and the joint socket C402; the bottom plate 101 and the sliding member 201 support the support member 401 in at least three-point manner to ensure the stability of the support member 401. At the same time, at least two sliding members 201 respectively control both sides of the support member 401, and the other end of the support member 401 is restricted by the bottom plate 101, so as to realize the change in the angle of the support member 401 relative to the bottom plate 101.

[0036] Among them, as Figure 3 and Figure 4As shown, screw holes are provided in the glenoid fossa A103, glenoid fossa B202 and glenoid fossa C402, and locking screws 3 are inserted into the screw holes; the locking of the locking screws 3 can limit the rotation between the joint head of the connecting rod 5 and the glenoid fossa, and maintain the stability of the support member 401 of the instrument during use.

[0037] Among them, as Figure 5 shown, one end of the threaded rod 102 is provided with a through hole longitudinally penetrating the threaded rod 102, and a wrench 104 is inserted into the through hole; the wrench 104 can assist medical staff to rotate the threaded rod 102, which is more convenient and fast. At the same time, one end of the threaded rod 102 can also be connected to a motor and driven to rotate by the motor.

[0038] Among them, as Figure 1 and Figure 5 shown, a detachable transmission member 106 is sleeved on one end of the threaded rod 102; at least two threaded rods 102 are connected and rotated in the same direction through the transmission member 106; through the connection of the transmission member 106, when one threaded rod 102 is rotated, other threaded rods 102 rotate synchronously in the same direction, which is more convenient to complete the synchronous displacement operation of the sliding member 201. At the same time, when a distance difference appears between the sliding members 201, by disassembling the transmission member 106, a single transmission member 106 can be rotated; the transmission member 106 can adopt belt transmission, sprocket transmission, gear transmission, etc.

[0039] Among them, as Figure 2 and Figure 5 shown, a fixing member 105 is fixedly connected to the lower end of the bottom plate 101, and the fixing member 105 is an elastic clip; the instrument is fixed to the surgical plane through the fixing member 105; in another embodiment, the fixing member 105 is a magnetic member and can be magnetically adsorbed on a tabletop made of ferromagnetic metal.

[0040] Among them, as Figure 3 and Figure 4 shown, the support member 401 is made of a flexible material, and a metal bracket is provided inside the support member 401; the support member 401 is bent into a structure adapted to the patient's tibia, and through the flexible material, damage to the contact position of the patient by hard materials is avoided.

[0041] The specific usage method and function of this embodiment: In the present invention, when the threaded rod 102 rotates, the sliding member 201 moves along the axial direction of the threaded rod 102 through the cooperation with the threaded rod 102. When the two sliding members 201 are displaced synchronously, by changing the length and angle of the connecting rod 5, the height of the support member 401 supported by the connecting rod 5 changes. If there is a distance difference between the displacements of the two sliding members 201, the changes in the length and angle generated by the two connecting rods 5 are different, and the support member 401 will generate an angular change compared with the initial position.

[0042] The above are only exemplary embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. The protection scope of the present utility model is determined by the appended claims.

Claims

1. An adjustable tibial intramedullary nail knee flexion positioner, characterized in that: include: Support member (401); A bottom plate (101) is rotatably connected to at least two threaded rods (102), and the outer sides of the threaded rods (102) are respectively connected to sliding members (201) through threads; the sliding members (201) move along the axial direction of the threaded rods (102); at least three connecting rods (5), the connecting rods (5) being a telescopic structure, and the supporting member (401) being movably connected to the sliding member (201) and the bottom plate (101) respectively through the at least three connecting rods (5); When the threaded rod (102) drives the sliding member (201) to move, the supporting member (401) is pushed to move via the connecting rod (5), so that the height and angle between the supporting member (401) and the bottom plate (101) are changed.

2. The adjustable tibial intramedullary nail knee flexion positioner according to claim 1, characterized in that: The upper end of the base plate (101) is provided with at least one joint socket A (103); the upper end of the sliding member (201) is provided with a joint socket B (202); and the lower end of the supporting member (401) is provided with at least three joint sockets C (402).

3. The adjustable tibial intramedullary nail knee flexion positioner according to claim 2, characterized in that: Both ends of the connecting rod (5) are provided with joint heads, and the joint socket A (103) and the joint socket C (402), and the joint socket B (202) and the joint socket C (402) are respectively connected via the joint heads of the connecting rod (5).

4. An adjustable tibial intramedullary nail knee flexion positioner according to any one of claims 2-3, characterized in that: The articular fossa A (103), the articular fossa B (202) and the articular fossa C (402) are provided with screw holes, and locking screws (3) are inserted into the screw holes.

5. The adjustable tibial intramedullary nail knee flexion positioner according to claim 1, characterized in that: One end of the threaded rod (102) is provided with a through hole which longitudinally penetrates the threaded rod (102), and a wrench (104) is inserted into the through hole.

6. The adjustable tibial intramedullary nail knee flexion positioner according to claim 1, characterized in that: One end of the threaded rod (102) is sleeved with a detachable transmission member (106); at least two threaded rods (102) are connected via the transmission member (106) and rotate in the same direction.

7. The adjustable tibial intramedullary nail knee flexion positioner according to claim 1, characterized in that: A fixing member (105) is fixedly connected to the lower end of the bottom plate (101), and the fixing member (105) is an elastic clip.

8. The adjustable tibial intramedullary nail knee flexion positioner according to claim 1, characterized in that: The support member (401) is made of a flexible material, and a metal bracket is provided inside the support member (401).

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