SU1487869A1 - Apparatus for measuring force of muscles and scope of mobility of hip joint - Google Patents

Description

The invention relates to medical equipment, namely, devices for biomechanical studies of human lower limbs, and can be used for angulo-dynamometric assessment of the state of the musculoskeletal system. The purpose of the invention is to improve the accuracy of assessment of the functional state of the muscles of the hip joint

FIG. one

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measurements of maximum muscle strength depending on the relative position of the lower leg and thigh and the direction of their movement at any point of the trajectory. The device contains the base 1, on which the pillars 3 and the supporting element 14 are installed, pelvic pellets 6, femoral pilot 7 and dynamometer 11. The goal is achieved by inserting the protractor 17 installed in the device with the ability to move relative to the pilots. element 14 is installed rotatably around its own axis and is made in the form of a yay with a longitudinal groove in which, using an adjusting nut 16, a rod 13 is threaded connected to a dynamometer 11 and the base has an angular scale of 2.8 Il.

The invention relates to medical engineering, in particular to devices for biomechanical studies of human lower limbs, and can be used for a dynamo-Angulo ^£ metric evaluation locomotor system state.

The purpose of the invention is to improve the accuracy of assessing the functional state of the muscles of the hip joint by measuring the maximum sipy mppts depending on the relative position of the lower leg and thigh and the direction of their movement at any point of the trajectory,

'FIG. 1 shows a device, 30 is a general view; figure 2 - the same, when measured during flexion or extension of the thigh; on fig.Z and 4 - the scheme of measurements at the abduction and reduction of the thigh; 5 and 6 are the same when bending and unbending the hip; 7 and 8 - the same, with external and internal rotation of the thigh.

A device for determining the strength of 40 muscles and volume ~ contains a base 1, equipped with an angular scale 2. On the base 1, a rack 3 is rigidly fixed. ·

On the uprights 3 by means of the guide sleeves 4 are movably mounted across. 45

Rechina 5, Pelvic pellets 6 and femoral pilot 7 are pivotally connected to the rods 8 and are fixedly mounted on crossbars 5 using retainers 9. The pelvic pellets 6 are connected between 50 belts 10, the dynamometer 11 is connected to the cuff 12 and the threaded rod 13 installed in the longitudinal the groove of the support element 14, the support element 14 b using clamps 9 55

mounted on racks 3. A scale 15 is applied along the groove of the support element. Threaded rod 13 contains an adjusting nut 16. A goniometer 17 with a vertical branch 18 equipped with a scale 19 and a cuff 20 is movably mounted on a horizontal branch 21. A horizontal branch 21 with retainers 22 and guides rods 23 movably in two mutually perpendicular planes connected with rods 8 pelvic pellots 6.

The device works as follows.

When determining the force, the mpps involved in the hip cast (Fig. 4), tested with pelvic pilots 6 and belts 10, are fixed in the pelvic region. The protractor 17 coaxially set with the hip joint in the anteroposterior direction, while the vertical branch 18 is installed on a straight line connecting the centers of the hip and knee joints using the cuff 20 (figure 1). The cuff 12 is fixed in the lower third of the thigh and is connected to the dynamometer 11. The angle of the lead is recorded on the indication of the protractor 17, and the length of the arm opposing the force is on the scale of the vertical branch 18. With the development of the maximum possible force due to the compression of the soft tissues, the thigh deviates from the initial position in the direction of reduction at a certain angle. Screwing the adjusting nut 16 on the threaded rod 13, adjust the angular position of the thigh, exposing it to the original desired position. Then, with maximum effort, gradually; when stamping the adjusting nut 16, a force gauge is recorded by the dynamometer in the required

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points of the trajectory of the hip. In this case, the component of the force is subtracted from the readings of the dynamometer 11, part-. caught by the weight of the leg - recorded by a dynamometer before the development of efforts at each angular position of the thigh.

In determining the range of motion, the dynamometer 11 is disconnected and the angle of maximum lead-reduction in the hip-drop is recorded from the inclinometer 17. renal joint.

Similarly, measure the strength of the muscles involved in the hip abduction (fig.Z).

Directly determining the strength of the muscles involved in flexing the thigh, permute the dynamometer 11 and the protractor 17 (FIGS. 2 and 5), setting the protractor coaxially to the rotation of the hip joint in the lateral direction, the vertical projectile 18 of the protractor 17 is set in the direction of the longitudinal axis of the thigh and fixed with cuffs 20.

Similarly, measure the strength of the muscles involved in the extension of the thigh (6).

When determining the strength of the muscles of the outer or inner thigh rotators (Fig.7 and 8), the cuff 12 connected to the dynamometer 11 is fixed in the lower third of the leg. The femur is fixed by the femoral pilot 7 with the knee joint bent at a right angle with the possibility of rotational movements. At the same time, the axis of the thigh is projectively combined with the center of the angular scale 2. The subject performs the external or internal rotation of the thigh with the maximum possible force. The length of the shoulder action of the force opposing the movement relative to the axis of rotation of the joint is determined on a scale 15 applied along the groove of the support element 14. The volume of movements is determined by the projection of the axis go | Leni on the angular scale 2.

When determining the maximum strength of muscle synergist groups, the hip is given such positions in which there is a combination of the action of these muscle groups. To do this, determine the muscle strength at various angles and combinations of the provisions of the thigh: pride.denie with internal rotation, bringing with external rotation, abduction with flexion and rotation, etc.

The device allows to determine the volume of movements of the hip joint and the functionality of the muscle groups involved in the movements at a given angular position of the thigh, as well as to identify such positions in which the combination of synergistic muscles gives the maximum force during movements of the thigh. This makes it possible to establish fragments of the femoral reach with corrective-lengthening, reconstructive surgical interventions in functionally advantageous positions. The device also allows you to identify inactive muscle groups with a particular pathology of the lower extremities.

Claims (1)

Claim A device for determining the strength of muscles and the range of movements of the hip joint, comprising a base, on which are mounted interconnected stands and movably connected pelots, as well as a support element mounted for movement along the uprights, and a diameter mounted for movement between the support an element and a cuff, characterized in that, in order to improve the accuracy of assessing the functional state of the muscles of the hip joint by measuring the maximum muscle strength depending on the mutual The location of the lower leg and thigh and the direction of their movement at any point of the trajectory, the protractor is inserted into it, mounted for movement relative to the pilots, and the supporting element is mounted between the posts to be rotated around its own axis and made in the form of a transverse rail with a longitudinal groove ·, in which by means of an adjusting nut a rod is connected to the dynamometer with a thread, and the base contains an angular scale. 1487869 BUT Fig.E Fim, 1487869