Device for passive mobilization of the joints of the extremities with mechanically or electronically generated rhythmic movement

Abstract

Device according to embodiment 1 of the invention (mechanical system) for passively mobilizing a patient's joint, comprising a mechanical vibration generation system in which a weight connected to a spring is suspended from a traction cable, wherein a single pulse generates a rhythmic vibration which can be transmitted to the patient's leg via the cable.

Description

2. Technical area

[0001] The invention relates to a medical / sports training and therapy device (hereinafter referred to as “device”) for the passive mobilization of the joints of the extremities, i.e. the upper and lower limbs (hereinafter referred to as “joint”) in the case of: a) in patients with limited mobility or osteoarthritis (mainly). b) for athletes for isometric muscle training (if desired), hereinafter referred to as “user” of the device. 3. State of the art

[0002] German utility model DE20 2011 105 997 U1 discloses a device in which a weight suspended from a rope generates a rhythmic oscillation that is transmitted to a patient's joint. In the aforementioned utility model, the device simulates a gait-like hip movement, but the joints are not subjected to their own weight. Disadvantages of the aforementioned utility model include limited controllability, the need to repeat the manual impulse to prevent rapid dissipation of the oscillation, and the lack of customization in the selection of the force and frequency of the oscillations. 4. Object of the invention

[0003] The invention aims to provide an improved device that allows a gentler, better controlled, alternatively automated movement in the gap of the joint - with less, alternatively without active participation of the patient. 5. Description of the deviceEmbodiment 1 - Mechanical system (weight-spring):

[0004] The device comprises a cable-pull suspension system in which a weight is serially coupled to a spring. A single manual pulse generates an oscillation that is sustained longer and gentler due to the spring's restoring force. The user can influence the duration and intensity through light physical exertion. Embodiment 2 - Electronic system (motor-controlled):

[0005] The device consists of a compact, electrically operated device that transmits periodic pulling movements to the joint of the lying or standing user via a cable pull system. The frequency and pulling force are electronically adjustable. It is controlled via a control panel or a mobile app. A safety shutdown is provided. 6. Advantages of the invention • Joint-protecting passive mobilization with complete elimination of the body weight and joint stress caused by harmful dynamic forces when walking, which promote further osteoarthritis. • Finely adjustable movement parameters (frequency, pulling force). • Also suitable for bedridden patients. • Self-use without medical personnel. • Reduction of pain and slowing of degenerative processes. • Targeted isometric muscle training for athletes. • Cost-effective Drawings

[0006] Comparison of the dynamic forces in the gap of the hip joint, here using the example of the exercise device in embodiment 1 (similar to embodiment 2), as described in point 5. Fig. Joint tension / time diagram of steps during free walking, without exercise equipment. Fig.Joint tension / time diagram of the tensile force for the user lying on his back on the floor, his leg tied at the ankle. LegendCoordinates: x-axis: t = time variable y-axis: s = stress in the joint space

[0007] Meaning of the curves in both diagrams: IS = Internal tension in the joint space when lying down SS = Static tension in the joint space when standing, own weight DS = Dynamic tension in the joint space when walking UG = negative pressure in the joint space, tensile force reduces internal tension(!) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2011 105 997 U1

[0002]

Claims

[1] Device according to embodiment 1 of the invention (mechanical system) for the passive mobilization of a patient's joint, comprising a mechanical vibration generation system in which a weight connected to a spring is suspended from a traction cable, whereby a rhythmic vibration is generated by a single pulse which can be transmitted to the patient's leg via the cable. [2] The device according to embodiment 2 of the invention (electronic system) for passive mobilization of a patient's joint comprises a traction cable system connected to an electrically operated device, in which the force and frequency, as well as the switching on and off process, are controlled electronically via a control panel or a mobile app. A safety shutdown is provided. The motor-generated oscillating restoring force of the electrically operated device is maintained until the device is switched off manually, electronically, or in an emergency. The patient can adjust the duration and intensity electronically via the control panel or an app. [3] Device according to claim 1 or 2, wherein the operation of the devices, ie the setting / adjustment of the frequency and the restoring force, as well as the switching on and off process can be carried out by the device itself. [4] Device according to claim 2, wherein an automatic safety shutdown occurs in case of resistance or malfunction. [5] The device according to claim 1, wherein the spring is a progressive spring. The weight and spring can be manually selected. [6] Device according to claim 2, wherein the device is realized as a compact, portable device connected to 220 V power, with electronic adjustment of the restoring force on the on / off switch and adjustable frequency, the set values ​​of both being visible on the separate displays. [7] Device according to one of claims 1 to 2, wherein the device is designed to be portable and foldable.

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