CZ2008238A3 - Device for mechanical testing of human body functional segments - Google Patents

Abstract

Apparatus for mechanically testing human body functional segments (4) comprising clamping elements (3) of a tested human body functional segment (4) and a driving device. The clamping elements (3) of the tested human body functional segment (4) are mounted on at least two fixing plates (1) which are connected at their outer periphery by a system of obliquely arranged linear drives (2), wherein the linear actuators (2) are connected to the control the device and test space for the tested functional segment (4) of the human body are situated in the interior space defined by the fixing plates (1) and the linear actuators (2).

Description

(57)

Device for mechanical testing of human body functional segments (4) comprising clamping elements (3) of the tested human body functional segment (4) and a drive train. The clamping elements (3) of the tested human body functional segment (4) are mounted on at least two fixing plates (1) which are connected on their outer periphery by a system of obliquely arranged linear drives (2), the linear drives (2) being connected to the control device and test area for the human body function segment (4) under test are situated in the inner space defined by the fixation plates (1) and the linear drives (2).

CZ 2008 - 238 A3

PS3567CZ

Equipment for mechanical testing of functional segments of the human body

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a device for mechanical testing of functional segments of a human body, the apparatus comprising clamping elements of the tested functional segment of a human body and a drive train.

BACKGROUND OF THE INVENTION

There is known a device for mechanical testing of human body functional segments, for example according to DE 100 63 630 A1 and DE 199 12 473 A1, but their common disadvantage is that they only allow action on the ends of the human body functional segments to be tested. each part of the tested functional segments of the human body, eg when testing spinal systems with several vertebrae, etc.

It is an object of the invention to overcome or at least minimize the disadvantages of the prior art.

SUMMARY OF THE INVENTION

The object of the invention is achieved by a device for mechanical testing of human body functional segments, characterized in that the clamping elements of the tested human body functional segment are supported on at least two fixing plates which are connected on their outer circumference by a system of inclined linear drives. the actuators are connected to the control device and the test area for the human body function segment under test is situated in the interior space defined by fixation plates and linear actuators.

According to a preferred embodiment, the fixing plates are provided with a central through hole.

According to a further preferred embodiment, the fixing plates have a circular shape and in their central part are provided with a circular through hole with

PS3567CZ fixtures for the tested functional segment of the human body and on its outer circumference are provided with connecting elements for removable connection of the ends of linear drives.

The advantage of this solution is that its design allows a targeted action on each part of the multi-part functional functional segment of the human body by always using an optimal number of fixation plates according to the number of parts of the tested functional segment of the human body. By using the so-called Stewart construction, virtually any relative movement of every two adjacent fixation plates is made possible, which makes it possible to simulate very complex overall movements of multi-part functional segments of the human body, where individual parts, eg spinal vertebrae . This allows, for example, a much more accurate examination of the impact of individual medical interventions on the resulting mobility of the functional functional segment of the human body being tested, and allows improved fixation and replacement designs for patients undergoing such surgical interventions.

Overview of the drawings

The invention is schematically shown in the drawing, wherein Fig. 1 shows a block diagram of the arrangement of the device according to the invention; Fig. 2 shows the arrangement of the device according to the invention for testing simple elements; Fig. 4 shows the arrangement of the device according to the invention for testing the part of the spine with the fixator applied, Fig. 5 shows the arrangement of the device according to the invention for simulating abrasion of the functional surfaces of the hip joint. device according to the invention for simulating chewing movements and loading of teeth and lower jaw.

DETAILED DESCRIPTION OF THE INVENTION

The device for mechanical testing of functional segments 4 of the human body comprises at least two fixing plates 1, which are on their outer periphery

The PS3567CZ is connected to the ends of the oblique linear drives 2. The fixing plates 1 are parallel in the basic position. The linear drives 2 are coupled to a power source and further connected to a control device (not shown). In order to improve the gripping of the test part of the human body, the fixing plates 1 in their central part are provided with a through hole 10 to which the clamping means 3 of the test functional segment 4 of the human body are assigned. The test area for the human body function segment 4 to be tested is thus situated in the interior space delimited by the fixation plates 1 and the linear drives 2. The device may comprise more than two fixation plates 1, as required, each two adjacent fixation plates 1 being connected obliquely arranged linear drives 2 connected to a control device. Thus, each two adjacent fixation plates 1 form a substantially autonomous system, but the fixation plates 1 arranged between the outer fixation plates 1 are part of two adjacent autonomous systems, as schematically shown in FIG.

It can be advantageous from a manufacturing and utility point of view if the fixing plates 1 have a circular shape, in their central part they are provided with a circular through hole 10 with clamping elements 3 for the tested functional segment 4 of the human body. The elements 30 for repeatedly detachable connection of the ends of the linear drives 2 thus constitute a substantially modular construction which is usable for testing a wide range of properties of various types of functional body segments 4, as will be described in the examples below.

Fig. 2 illustrates the use of the device of the invention to simulate the movement and loading of a single spinal segment. The device comprises a pair in the basic position of the parallel circular fixing plates 1, which are provided with a central through hole 10. Through the holes 10 are assigned suitable bar clamping elements 3 in which one spine segment is clamped at its ends. Fixing plates they are connected by six obliquely situated linear drives 3, which are connected to a control device (not shown). Backbone segment, resp. its tested part is situated in the space defined by fixation plates 1 and linear drives 2. Individual components of the resulting movement are derived by simultaneous control of all linear drives 2. The control system controls individual linear drives 2 so as to achieve the desired resultant

PS3567CZ motion of the spine segment (flexion, extension, latero-flexion, torsion and their combination).

Figure 3 illustrates the use of the device of the invention to simulate the movement and loading of a spinal sample consisting of several spinal segments simultaneously. The device comprises four parallel circular fixation plates 1 in the basic position, which are provided with a central through hole 10. Through the holes 10, a multi-segment spine sample passes through the entire length of the device. Each two adjacent fixing plates 1 are connected by six obliquely situated linear drives 3, which are connected to a control device (not shown). The whole multi-segment backbone sample, resp. its tested part is situated in the space defined by the outer fixation plates 1 and linear drives 2. Individual components of the resulting movement are derived by simultaneous control of all linear drives 2. The control system controls the individual linear drives 2 connecting the individual fixing plates 1 so as to achieve the required resulting movement of the whole vlcesegmental spine sample (flexion, extension, latero-flexion, torsion and their mutual combination). The resulting movement along the entire length of the multi-segment spine sample is determined by the relative movement of each adjacent pair of fixation plates 1.

Fig. 4 illustrates the use of the device of Fig. 3 to simulate the movement and loading of a multi-segment spine sample with fixator 5 applied. From the results of the tests performed in Figs. 4 and 2 or 3, sample and it is possible to use this knowledge for example in the development of new fixators, ad. when modifying existing fixators.

Figure 5 illustrates the use of the device of Figure 2 to simulate abrasion of total hip arthroplasty. The pair in the basic position of the parallel circular fixing plates 1 with the central through holes 10 is connected by six linear drives 2 connected to the control device. In the clamping elements 3 which are associated with the holes 10 in the fixing plates 1, a hip joint sample is mounted. The control system controls the individual linear drives 2 in such a way as to achieve this

PS3567GZ desired resultant movement in the hip joint. After a simple modification, the device according to the invention can be used for testing total hip joint endoprostheses.

Fig. 6 shows the use of the device of Fig. 2 to simulate the movement and load of a knee joint or knee joint with a fixator applied. The pair in the basic position of the parallel circular fixing plates 1 with the central through holes 10 is connected by six linear drives 2 connected to the control device. Since the knee joint is larger than the samples tested in the exemplary embodiments of Figs. 2 to 5, the linear drives 2 used herein have a greater length than that of the exemplary embodiments of Figs. 2 to 5. it is possible to change the size of the test space for the sample delimited by the fixing plates 1 and the linear drives 2 at the moment. In the bar clamping elements 3, which are assigned to the holes 10 in the fixing plates 1, a knee joint sample is mounted. The control system controls the individual linear drives 2 so as to achieve the desired resultant movement in the knee joint. The control system is able to control the linear drives 2 in such a way that not only the desired resultant knee joint movement is achieved, but also the action of passive elements - ligaments.

FIG. 7 illustrates the use of the device of FIG. 6 to simulate chewing movements and loading of the lower jaw or individual teeth. The pair in the basic position of the parallel circular fixing plates 1 with the central through holes 10 is connected by six linear drives 2 connected to the control device. Since the knee joint is larger than the samples tested in the exemplary embodiments of Figs. 2 to 5, the linear drives 2 used herein have a greater length than that of the exemplary embodiments of Figs. 2 to 5. assigned to the holes 10 in the fixing plates 1, a skull sample with a jaw and teeth is attached. In the illustrated embodiment, the holes 10 in the fixing plates 1 have a larger dimension, as the test sample is larger. By appropriately selecting the size of the holes 10 in the fixation plates 1 in cooperation with a suitable length of the linear drives 2, it is possible to immediately adapt the test device to the size of the currently tested sample - the skull. The control system controls

PS3567GB single linear drives 2 to achieve the desired lower jaw movement and / or tooth load, etc.

In general, the size and shape of the fixing plates 1, the size and shape of the holes 10 in the fixing plates, the clamping elements 3 and 5 and the length of the linear drives 2 connecting each two adjacent fixing plates 1 can always be created for each particular sample to be tested. optimal, accurate and completely variable testing equipment. It is also possible to use a different number of linear drives 2 than the six shown between each pair of fixation plates 1. If necessary, it is also possible for the individual adjacent fixation plates 10 1 to be connected by linear drives of different length so that be different.

Industrial applicability

The device for mechanical testing of functional segments 4 of the human body is useful in the medical and biomechanical fields for determining the mechanical properties of human body elements, testing commercial fixators and replacements for optimal use in a particular clinical case.

The device for mechanical testing of the functional segments 4 of the human body is also useful in the manufacturing-technical field as a testing device for 20 developers and manufacturers of medical technology, providing the possibility of simulating the movement load of the segments 4 of the human body.

Claims (4)

PATENT CLAIMS A device for mechanically testing functional body segments comprising a clamping element of a test human body segment and a drive train, characterized in that the clamping elements (3) of the test human body segment (4) are supported on at least two fixing plates (1) which are connected on their outer circumference by a system of obliquely arranged linear drives (2), the linear drives (2) are connected to the control device and the test space for the tested functional segment (4) of the human body is situated in the inner space delimited by fixing plates ) and linear drives (2). Device according to claim 1, characterized in that the fixing plates (1) are provided with a central through hole (10). Device according to any one of claims 1 or 2, characterized in that the linear drives (2) are detachably connected to the fixing plates (1). Device according to any one of claims 1 to 3, characterized in that the fixing plates (1) have a circular shape and are provided in their central part with a circular through hole (10) with clamping elements for the tested functional segment (4) of the human body.