Modular full-leg orthosis with continuously adjustable relief strut for weight limitation

Abstract

Modular full leg orthosis (KAFO) for partial relief of the lower musculoskeletal system, encompassing a relief strut (2) which is arranged between a thigh fixation element (1) and a pelvic or hip element (3), wherein the relief strut (2) contains a continuously adjustable spring-damper unit (5) whose preload can be regulated in such a way that a defined maximum load on the lower leg or the entire leg is mechanically limited, and wherein the excess load is transferred via the relief strut (2) to the pelvic or hip element (3).

Description

1. Title of the invention

[0001] Modular full leg orthosis with continuously adjustable relief strut for weight limitation" 2. Technical field

[0002] The invention relates to a medical orthosis for stabilizing and relieving the human leg, particularly in cases of neurological or orthopedic impairments. It serves to control weight transfer from the lower leg to the thigh or the pelvic-hip region. 3. State of the art

[0003] Conventional KAFO orthoses stabilize the leg, but distribute the entire load through the lower or upper leg. Targeted load limitation is not provided. An adaptive solution for relieving pressure under varying load demands is lacking.

[0004] "Existing solutions, such as the orthosis from Ottobock described in EP3893819B1, primarily aim at the electronic control of movement sequences and the improvement of mobility through sensors and actuators. Targeted relief of individual body areas when a limit is exceeded is not provided for there. The present invention differs in that it comprises a mechanically or material-adaptive relief unit that enables stepless limitation of the load without electronic control."

[0005] "Thanks to the integrated relief strut with adaptive limiting, the additional use of external walking aids is often unnecessary, as the orthosis reacts independently to peak loads and redirects them to other areas of the body." 4. Object of the invention

[0006] The aim is to provide an orthosis that allows for stepless adjustment of the maximum load on the lower thigh and mechanically transfers excess load to the thigh-pelvic area without restricting the mobility of the affected joints. 5. Solution

[0007] The orthosis includes: • A thigh-pelvis-hip cuff to absorb the additional load • A spring-damper unit with an adjustment wheel that regulates the preload and thus the maximum load on the lower leg or the entire leg between 0 kg and the actual body weight, but only up to the technical feasibility of the materials. • A mechanical, hydraulic, pneumatic or electronic switching mechanism: If the set load is exceeded, the force is directed via a support to the respective cuff. • A hinged knee-hip joint that preserves mobility • A footplate with pressure sensors (optional) that measures the load and can provide feedback. 6. Advantages of the invention • Individually adjustable relief • Protection against structural overload of the upper or lower leg • Comfortable load distribution via the thigh or pelvis • Expandable with sensors and app connectivity • Suitable for rehabilitation, special disabilities, everyday life and sports. Reference symbol component description 1 Thigh fixation 2 Relief strut 3 Pelvis / Hip element 4 locking elements 5 Spring-damper unit with adjustment wheel 6 Hinge / Angle adjustment QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] EP 3893819B1

[0004]

Claims

[1] Modular full leg orthosis (KAFO) for partial relief of the lower musculoskeletal system, comprising a relief strut (2) which is arranged between a thigh fixation element (1) and a pelvic or hip element (3), wherein the relief strut (2) contains a continuously adjustable spring-damper unit (5) whose preload can be regulated in such a way that a defined maximum load on the lower leg or the entire leg is mechanically limited, and wherein the excess load is transferred via the relief strut (2) to the pelvic or hip element (3). [2] Orthosis according to claim 1, characterized by , that the relief strut (2) is telescopically designed and can be continuously adjusted in length via a mechanical locking, screw or clamping system (4). [3] Orthosis according to any one of the preceding claims, characterized by, that the spring-damper unit (5) has a progressive characteristic curve and operates mechanically, hydraulically, pneumatically or in combination. [4] Orthosis according to any one of the preceding claims, characterized by that the power transmission is entirely mechanical, without electronic components. [5] Orthosis according to any one of the preceding claims, characterized by , that the relief strut (2) is made of a lightweight, high-strength material and is segmented so that individual sections can be adjusted independently of each other. [6] Orthosis according to any one of the preceding claims, characterized by , that a hinge (6) with a defined radius of movement is arranged between the thigh fixation (1) and the pelvic / hip element (3), which takes into account the natural leg axis. [7] Orthosis according to any one of the preceding claims, characterized bythat the connecting elements are modular and interchangeable, allowing for adaptation to different leg lengths. [8] Orthosis according to any one of the preceding claims, characterized by , that the lower leg fixation (7) is achieved by means of Velcro and form-fitting guidance. [9] Orthosis according to any one of the preceding claims, characterized by that the orthosis has quick-release fasteners that allow for easy application and removal. [10] Orthosis according to any one of the preceding claims, characterized by that optional sensors are provided to measure the actual load and provide feedback to a display unit, without affecting the mechanical function.

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