RU148127U1 - DEVICE FOR REHABILITATION OF THE KNEE AND HIP JOINT - Google Patents

Abstract

A device for the rehabilitation of the knee and hip joints, comprising a housing with a base; electronic control unit; reversible electric drive; a frame consisting of support for the thigh and support for the lower leg, mounted on the carriage with the possibility of reciprocating movements; foot support, characterized in that on the outside of the foot support, a vibration unit is fixed with the possibility of directing vibration along the lower leg.

Description

The device relates to medicine, in particular to passive-action mechanotherapeutic devices for restoration of joint function, and is intended for rehabilitation training of patients after surgical treatment of diseases and injuries of the lower extremities, for the development of hip and knee joints.

A device for restoring the health of the knee and hip joints of a person (RU 2281077, IPC A61H 1/02) consisting of a frame, a reversible electric drive connected to a screw pair in the form of a lead screw and nut, transmission, two lodgements and support for the foot, characterized in which contains a fixed base and rocker arms pivotally mounted on the base, while the transmission is made in the form of two connected in parallel four-link mechanisms, and the rocker arms are rigidly connected with the second links h of the three-link mechanisms adjacent to the first links, the leg lodgement is fixed to the frame, the thigh lodgement is fixed to third links adjacent to the first links and connected through the fourth links to the second links, the foot support is mounted on an axis fixed by fixing elements to the frame groove, which is pivotally connected with a carriage, in the groove of which a screw pair nut is located. The disadvantage of this device is that when reaching the limiting angle of flexion or extension, further movement leads to a painful effect, which in turn leads to a lengthy rehabilitation process, and sometimes to the termination of rehabilitation.

The prototype of mechanotherapeutic devices using vibration is an apparatus for rehabilitation after injuries, fractures of the hip and diseases of the hip joint (RU 109405, IPC A61H 1/02) containing a body, an electronic control unit, a foot stand that makes movements as a result of the electric motor, characterized in that, in order to restore and ensure full motor volume in the hip joint, the electric motor is equipped with a mechanism that converts its rotational movements into low-amplitude horizontal -postupatelno-return, proximal, distal small-amplitude oscillatory and rotary movement, and on the basis of set machine compressor connected to the pneumatic compression Vibro-femoral cuff to which is attached vibrating element. The disadvantage of this device is that the apparatus does not allow to perform flexion-extensor movements in the amount necessary for the normal functioning of the knee joint. In addition, the use of vibration effects at a local point does not give efficiency and safety.

Vibration effect can relieve the pain effect due to muscle relaxation and tendon stretching, thereby increasing the range of flexion-extension angles and, accordingly, shortens the rehabilitation time. The most effective and safe vibration effect with an orientation along the lower leg.

The objective of the utility model is to create a reliable, easy-to-use device that will significantly reduce the pain of the patient during training, increase the optimal range of motion in the joint already at the beginning of the rehabilitation process, accelerate the rehabilitation time, and restore the joint functions in full.

The solution to this problem is achieved by the fact that the device for the rehabilitation of the knee and hip joints contains a body with a base; electronic control unit; reversible electric drive; a frame consisting of support for the thigh and support for the lower leg, mounted on the carriage with the possibility of reciprocating movements; support for the feet, while on the outside of the support for the feet, a vibration unit is fixed, with the possibility of directing vibration along the lower leg.

The technical solution is presented in the figure (Fig. 1):

On the case with base 1 there is a frame consisting of support for the thigh 2 and support for the lower leg 3, mounted on the carriage 12, support for the foot 4, the housing of the vibration unit 5, a bracket for attaching the support for the foot and the vibration unit 6, an ankle adjustment screw joint 7 with the possibility of back and plantar flexion, a foot support adjustment screw 8 with the possibility of supination and pronation of the foot, screws adjusting the length of the support for the lower leg 9, screws adjusting the length of the support for the thigh 10, sensor for determining the angle of bend of the knee joint 11.

Inside the device housing are located:

- A drive that provides reciprocating movement of the carriage of the apparatus 12, comprising, an engine, a gearbox, a ball screw transmission;

- Power Supply,

- Control board for carriage engines and vibration unit. Inside the vibrating unit 5 there is an eccentric engine.

The device operates as follows.

The limb of the patient is placed on the bed for the thigh and lower leg (not shown in the figure), mounted on the frame, while the knee joint should be in the center of rotation. The device is configured to adjust the length of the support for the thigh 2 from 32 cm to 52 cm using the adjustment screws 10, as well as the ability to adjust the length of the support for the lower leg 3 from 42 cm to 52 cm using the adjustment screws 9. Detection sensor the bend angle of the knee joint 11 is based on the Hall effect. The setting screws 7 and 8 fix the angle of the foot support for the most comfortable foot position. Located on the foot support, the vibration unit 5 provides a vibration effect along the lower leg of the patient with the following parameters. Vibration frequency in the range from 25 to 45 Hz with a frequency resolution of 5 Hz with a tolerance of ± 5%; The vibration amplitude is 2 mm with a tolerance of ± 10%.

The device provides reciprocating motion of the frame (bending - extension of the knee joint) with the following parameters:

The angle of rotation of the frame in the horizontal axis "Knee" in the range from minus 5 to 115 degrees

The angle of rotation of the frame in the horizontal axis of the "Hip" in the range from 8 to 86 degrees.

Speed range from 20 to 400 deg / min

The design of the device for patient safety provides reverse when exceeding the load threshold specified from the range from 80 to 550 H.

The technical result consists in creating a simple and reliable device that allows to reduce the pain of the patient during training, to shorten the rehabilitation period, to ensure full restoration of joint mobility, as well as used to improve joint metabolism, prevent stiffness in the joint, accelerate hematoma resorption / fluids, improving lymph and blood circulation, prevention of thrombosis and embolism.

Claims (1)

A device for the rehabilitation of the knee and hip joints, comprising a housing with a base; electronic control unit; reversible electric drive; a frame consisting of support for the thigh and support for the lower leg, mounted on the carriage with the possibility of reciprocating movements; foot support, characterized in that on the outside of the foot support, a vibration unit is fixed with the possibility of directing vibration along the lower leg.

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