Orthopedic technical device

• US 8,608,678 B2
• Filed: 05/19/2009
• Issued: 12/17/2013
• Est. Priority Date: 05/20/2008
• Status: Active Grant

• Current Assignee: Ottobock SE & Co. KGaA
• Original Assignee: Otto Bock HealthCare GmbH (OTTO BOCK Holding GmbH & Company KG)
• Inventors: Hahn, Tanja, Albrecht-Laatsch, Erik
• Primary Examiner(s): Szmal, Brian
• Assistant Examiner(s): Leedy, Megan
• Application Number:
  US12/993,135
• Publication Number:
  US 20110137212A1
• Time in Patent Office: 1,673 Days
• Field of Search: 600/587, 600/595, 602/1, 602/2, 602/5, 602/12, 602/16, 602/23, 602/27, 604 24- 65, 623 24- 65
• US Class Current: 602/23
• CPC Class Codes: A61B 5/112 Gait analysis
• CPC Class Codes: A61B 5/4851 Prosthesis assessment or monitoring
• CPC Class Codes: A61F 2/60 Artificial legs or feet or parts thereof
• CPC Class Codes: A61F 2/70 electrical
• CPC Class Codes: A61F 2/76 Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
• CPC Class Codes: A61F 2002/6854 for locking or unlocking a joint
• CPC Class Codes: A61F 2002/7695 Means for testing non-implantable prostheses for testing implantable prostheses A61F2240/008; for implanting artificial joints A61F2/468
• CPC Class Codes: A61F 5/0123 for the knees A61F5/0106 takes precedence

Abstract

The invention relates to an orthopedic technical device for the lower extremities, with at least one receptacle (12, 16) for an extremity (14, 18), a sensor (30) and an electric evaluating unit (34), which is connected with the sensor (30) for processing data of a sensor (30). According to the invention, it is proposed that the electric evaluating unit (34) be set up in order to carry out a method with the following steps: (i) switching into a learning mode, (ii) determining at least one characteristic value of the system (R, S, N, a_w,threshold), (iii) storing the characteristic value of the system (R, S, N, a_w,threshold), (iv) switching into an operating method and (v), in the operating mode, influencing, optimizing or selecting a control algorithm of the orthopedic device by means of the characteristic value of the system (R, S, N, a_w,threshold).

Claims

1. An orthopedic technical device for the lower extremities, comprising:

(a) a thigh receptacle for attachment to a thigh of a person,

(b) an angle sensor to register an inclination with respect to the vertical and to emit an inclination signal,

(c) an actuation device to release a switching command, and

(d) an electrical evaluation unit, connected to the sensor, for processing data from the sensor, and to the actuation device,

(e) wherein the electrical evaluation unit is configured to carry out a method with the following steps;

(i) upon receiving the switching command from the actuation device, switching into a learning mode,

(ii) establishing at least one fitting-error characteristic value that encodes a fitting error of the sensor,

(iii) storing the fitting-error characteristic value,

(iv) switching into an operating mode, and

(v) correcting inclination sensor data from the angle sensor with the aid of the at least one fitting-error characteristic value in the operating mode.

2. The orthopedic technical device as claimed in claim 1, wherein the electrical evaluation unit is configured to establish the at least one fitting-error characteristic value only if it is in the learning mode.

3. The orthopedic technical device as claimed in claim 1, further comprising:

(a) a shank receptacle for attachment to a shank, and

(b) a locking and/or damping mechanism for releasably locking and/or damping a relative movement between thigh receptacle and shank receptacle,

(c) wherein the orthopedic technical device is an orthosis, and

(d) wherein the electrical evaluation unit has a digital storage medium and is designed to actuate the locking and/or damping mechanism as a function of the inclination signal in the operating mode for activating and for releasing the locking and/or damping mechanism and to carry out a method with the following steps;

(i) switching into the learning mode,

(ii) establishing the fitting-error characteristic value that encodes a positional deviation between a correct position of the angle sensor and an actual position of the angle sensor,

(iii) storing the fitting-error characteristic value in the digital storage medium, and

(iv) activating and releasing the locking and/or damping mechanism with the aid of the fitting-error characteristic value in the operating mode.

4. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to change the fitting-error characteristic value only when it is in the learning mode.

5. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to activate the locking and/or damping mechanism and to establish the fitting-error characteristic value while the locking and/or damping mechanism locks or are damped the thigh receptacle and the shank receptacle relative to one another.

6. The orthopedic technical device as claimed in claim 3, wherein a system characteristic value is a fitting-error characteristic value that encodes a fitting error of the sensor.

7. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to carry out a method with the following steps:

(i) establishing a fitting-error characteristic value in the form of an inclination-error characteristic value that encodes the minimum value or the maximum value of the electrical inclination signal after switching into the learning mode, and

(ii) storing the inclination-error characteristic value in the digital storage medium,

(iii) wherein the locking and/or damping mechanism is activated and released on the basis of the inclination-error characteristic value in the operating mode.

8. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to carry out a method with the following steps:

(i) establishing a fitting-error characteristic value in the form of a side-error characteristic value that encodes a sign of a change in the inclination signal when the thigh receptacle swings forward, and

(ii) storing the side-error characteristic value in the digital storage medium,

(iii) wherein the locking and/or damping mechanism is locked and released on the basis of the side-error characteristic value in the operating mode.

9. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to carry out a method with the following steps:

emitting a signal prescribing a beat with which a user of the orthopedic technical device should walk with the orthopedic technical device.

10. The orthopedic technical device as claimed in claim 3, wherein the electrical evaluation unit is configured to emit an instruction to the user to walk with a prescribed gait.

11. A method for configuring an orthopedic technical device as claimed in claim 1, comprising:

(i) after switching into a learning mode,

(ii) moving the orthopedic technical device such that at least one fitting-error characteristic value can be established,

(iii) entering status information into the evaluation unit which encodes that state that the fitting-error characteristic value should be stored, and

(iv) entering status information into the electrical evaluation unit, which encodes the state that a switch into the operating mode should be taken.

12. The method as claimed in claim 11, comprising the steps of:

(a) moving the thigh receptacle into a forward-step position,

(b) entering status information into the evaluation unit, which encodes the state that the thigh receptacle is in the forward-step position such that an electrical evaluation unit of the orthosis can establish a maximum value or a minimum value of the inclination signal,

(c) moving the thigh receptacle into a standing position such that the electrical evaluation unit of the orthosis can correspondingly establish the maximum value or the minimum value of the inclination signal,

(d) entering status information into the evaluation unit, which encodes the state that the thigh receptacle is in the standing position, and

(e) entering status information into the evaluation unit, which encodes the state that input is complete.

13. An orthopedic technical device for the lower extremities, comprising:

(a) a thigh receptacle for a thigh,

(b) a shank portion that is pivotable with respect to said thigh receptacle,

(c) a sensor for registering an inclination with respect to the vertical and for emitting an inclination signal,

(d) a locking and/or damping mechanism for releasably locking and/or damping a relative movement between said thigh receptacle and said shank portion, and

(e) an electrical evaluation unit, connected to said sensor, for processing data from said sensor,

(f) wherein said electrical evaluation unit is configured to carry out a method with the following steps;

switching into a learning mode,

establishing at least one fitting-error characteristic value that encodes a fitting error of said sensor,

storing said fitting-error characteristic value,

switching into an operating mode, and

correcting sensor data with the aid of said at least one fitting-error characteristic value in said operating mode,

(g) wherein establishing said fitting-error characteristic value comprises the following steps;

(i) establishing a maximum value of said inclination signal,

(ii) establishing a threshold, which is smaller than said maximum value,

(iii) emitting an opening command to said locking and/or damping mechanism if said inclination signal drops below said threshold,

(iv) registering whether said locking and/or damping mechanism is released, and reducing said threshold if not,

(v) carrying out steps (ii) to (v) until said locking and/or damping mechanism is released, and

(vi) storing said fitting-error characteristic value in the form of said last threshold.

14. The orthopedic technical device as claimed in claim 13, wherein the electrical evaluation unit is configured to carry out a method with the following steps:

establishing a minimum value of said inclination signal, and

storing the last threshold if said last threshold is less than 0.9 times an average between said maximum value and said minimum value.

15. The orthopedic technical device as claimed in claim 13, wherein the electrical evaluation unit is configured to carry out a method with the following steps:

establishing whether said locking and/or damping mechanism is released during predetermined number of opening commands, and

carrying out steps (ii) to (v) as per claim 13 for an unchanging threshold until said locking and/or damping mechanism is released during said predetermined number of opening commands, before said last threshold is stored.