Orthopedic knee joint and method for controlling an orthopedic knee joint
The invention relates to an orthopedic knee joint, comprising an upper part ( 2 ), on which upper connecting means ( 20 ) are disposed, a lower part ( 3 ) pivotally supported on the upper part ( 2 ), connecting means for orthopedic components ( 4 ), and a stop ( ) for delimiting an extension movement, wherein the stop ( 7 ) is configured displaceably and coupled to an adjusting device ( 64 ), which is coupled to a control device ( 6 ), which actuates the adjusting device ( 64 ) as a function of sensor data and changes the position of the stop ( 7 ).
1. A method for controlling an orthopedic knee joint, comprising:
providing an orthopedic knee joint having an extension stop, an adjustment device, a control unit, a hydraulic damping system, and at least one sensor, the at least one sensor configured to generate sensor data;
determining, with the control unit, a stride from the sensor data;
automatically changing a position of the extension stop with the adjustment device, in response to control signals received from the control unit, to reduce a maximum knee angle based upon the determined stride being an increasing stride, the maximum knee angle being an angle of the knee joint measured on a rear side of the knee joint between an upper part and a lower part of the knee joint;
wherein changing the position of the extension stop is made independent of a resistance in a flexion direction applied by the hydraulic damping system.
2. The method as claimed in claim 1 , wherein the orthopedic knee joint comprises a blocking device, the method further comprising:
closing the blocking device when an extension stop position is reached.
3. The method as claimed in claim 1 , further comprising:
changing the position of the extension stop to a maximum extension position for standing.
4. The method as claimed in claim 1 , further comprising:
adjusting the position of the extension stop during a swing phase.
5. The method as claimed in claim 4 , further comprising:
continuously adapting the position of the extension stop.
6. The method as claimed in claim 1 , wherein the orthopedic knee joint comprises a blocking device, the method further comprising:
adjusting the position of the extension stop by closing the blocking device in a hydraulic line.
7. The method as claimed in claim 1 , further comprising:
measuring at least one of an acceleration occurring within the orthopedic knee joint using the at least one sensor.
8. The method as claimed in claim 1 , further comprising:
calculating the position of the extension stop and an adjustment travel length.
9. The method as claimed in claim 1 , further comprising:
setting a limit to the maximum knee angle when the orthopedic knee joint is fully extended.
10. The method as claimed in claim 1 , wherein the sensor data includes at least acceleration sensor data.
11. The method as claimed in claim 1 , wherein changing a position of the extension stop with the adjusting device includes adjusting the extension stop in a forward direction for walking and a reversed direction for standing.
12. A method for controlling an orthopedic knee joint, comprising:
providing the orthopedic knee joint with an extension stop, an adjustment device, a control unit, a hydraulic damping system, and at least one sensor;
sensing with the at least one sensor at least an acceleration associated with the orthopedic knee joint;
determining, with the control unit, a stride based at least in part on the sensing;
automatically altering a position of the extension stop with the adjustment device, in response to control signals received from the control unit, to reduce a maximum knee angle based in part upon the determined stride being an increasing stride, the maximum knee angle being an angle of the knee joint measured on a rear side of the knee joint between an upper part and a lower part of the knee joint;
wherein altering the position of the extension stop is made independent of a resistance in a flexion direction applied by the hydraulic damping system.
13. The method as claimed in claim 12 , further comprising:
adopting a maximum extension stop when a walking speed is zero.
14. The method as claimed in claim 12 , further comprising:
altering the position of the extension stop during a swing phase of the orthopedic knee joint.
15. The method as claimed in claim 12 , wherein the extension stop is altered by closing a blocking device in a hydraulic line.
16. The method as claimed in claim 12 , further comprising:
continuously altering the position of the extension stop.
17. The method as claimed in claim 12 , further comprising:
providing the orthopedic knee joint with an upper part and a lower part pivotally coupled to each other;
sensing a position of the upper part relative to the lower part;
wherein the sensed position is an angled position of the upper part relative to the lower part.
18. The method as claimed in claim 12 , further comprising:
calculating the position of the extension stop and an adjustment travel length.
19. The method as claimed in claim 12 , further comprising:
setting a limit to the maximum knee angle when the orthopedic knee joint is fully extended.