Limb volume accommodation in people with limb amputation

• US 9,056,023 B2
• Filed: 06/06/2014
• Issued: 06/16/2015
• Est. Priority Date: 02/07/2011
• Status: Expired due to Fees

• Current Assignee: University of Washington
• Original Assignee: University of Washington
• Inventors: Sanders, Joan, Otis, Brian, Allyn, Katheryn, Hafner, Brian, Cagle, John
• Primary Examiner(s): EISEMAN, ADAM JARED
• Application Number:
  US14/298,661
• Publication Number:
  US 20140288669A1
• Time in Patent Office: 375 Days
• Field of Search: 600587-595
• US Class Current: 1/1
• CPC Class Codes: A61F 2/7812 Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
• CPC Class Codes: A61F 2002/5092 Identification means for implantable prostheses A61F2250/0085
• CPC Class Codes: A61F 2002/689 Alarm means, e.g. acoustic
• CPC Class Codes: A61F 2002/705 Electromagnetic data transfer for implantable prostheses A61F2250/0002
• CPC Class Codes: A61F 2002/7635 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61F 2002/765 for measuring time or frequency
• CPC Class Codes: A61F 2002/7818 Stockings or socks for the limb stump cosmetic coverings A61F2002/5001
• CPC Class Codes: A61F 2007/0051 Stumps after amputation
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

A prosthetic sock monitoring system is disclosed. The sock monitoring system includes a storage device and a data collection unit. The data collection unit is operable to receive data from at least one sensor coupled to a prosthetic sock that is wearable by a patient, and store the received data in the storage device. A prosthetic sock is also disclosed. The sock comprises material shaped to fit over at least a portion of the residual limb of the patient and a thickness adapted for inserting the residual limb into the socket of the prosthesis while the sock is fitted over the residual limb. The sock also comprises one or more of a sock identification unit and a force sensing device.

Claims

1. A prosthetic sock for disposition over residual limb of a patient and insertion into a socket of a prosthesis associated with the patient, the prosthetic sock comprising:

material shaped to fit over at least a portion of the residual limb of the patient and of a thickness adapted for inserting the residual limb into the socket of the prosthesis while the sock is fitted over the residual limb;

a sock identification unit operable to identify at least one identifying characteristic of the prosthetic sock and communicate the at least one identifying characteristic to a computing device separate from the prosthetic sock, the at least one identifying characteristic being configured to distinguish the prosthetic sock from other prosthetic socks; and

a force sensing device operable to determine an amount of force applied to the force sensing device and communicate information indicating the amount of force applied to the force sensing device to the computing device separate from the prosthetic sock, and wherein the sock identification unit and the force sensing device are integrated into a single device;

wherein one or more of the sock identification unit and the force sensing device are provided at a predetermined location on or in the material, the predetermined location being associated with the placement of an antenna located in the socket of the prosthesis.

2. The prosthetic sock of claim 1, wherein the sock identification unit is selected from the group consisting of:

a passive radio frequency identification tag, and an active radio frequency identification tag.

3. The prosthetic sock of claim 1, wherein the force sensing device is selected from the group consisting of:

a piezoelectric sensor, a piezoresistive film sensor, a capacitive film sensor, and an optical pressure sensor.

4. The prosthetic sock of claim 1, wherein one or more of the sock identification unit and the force sensing device are operable to communicate information to the computing device using a frequency band selected from the group consisting of:

very low frequency, low frequency, medium frequency, high frequency, very high frequency, ultra high frequency, super high frequency, extremely high frequency, and tremendously high frequency.

5. The prosthetic sock of claim 1, wherein one or more of the sock identification unit and the force sensing device are located at a brim of the material, an end of the material opposite an end for receiving the residual limb of the patient, and a location corresponding to a center of the antenna when the prosthetic sock is disposed over the patient'"'"'s residual limb and inserted into the socket of the prosthesis.

6. The prosthetic sock of claim 1, wherein one or more of the sock identification unit and the force sensing device include a transmission antenna having an orientation such that, when the prosthetic sock is disposed over the patient'"'"'s residual limb and inserted into the socket of the prosthesis, the transmission antenna is arranged in parallel with the antenna located in the socket of the prosthesis.

7. The prosthetic sock of claim 1, further comprising an additional sensor operable to sense one or more of displacement between a region of the material and the socket, temperature of a region of the material, oxygen saturation, pulse, blood flow, and angle of the socket.

8. The prosthetic sock of claim 1, wherein the at least one physical characteristic of the prosthetic sock further comprises at least a sock thickness.

9. The prosthetic sock of claim 1, wherein the at least one physical characteristic of the prosthetic sock further comprises at least a sock ply.

10. The prosthetic sock of claim 1, further comprising a sensor operable to determine at least two use cases, the at least two use cases comprising:

whether the prosthetic sock is being worn; and

whether the prosthetic sock is being worn in combination with a prosthesis.

11. The prosthetic sock of claim 10, wherein the at least two use cases further comprise:

whether the prosthetic sock is being worn in combination with one or more additional prosthetic socks.

12. The prosthetic sock of claim 1, further comprising a displacement sensor configured for measuring a distance between the prosthetic sock and a socket.

13. A mobile computing device associated with a patient having a residual limb onto which the patient is capable of disposing a prosthetic sock for insertion into a socket of a prosthesis associated with the patient, the mobile computing device comprising:

a storage element for receiving information defining a sock management strategy;

a processor for processing the information defining the sock management strategy to determine when the patient should wear the particular prosthetic sock selected from the plurality of different prosthetic socks; and

an output device for providing an indication to the patient indicating when the patient should wear the particular prosthetic sock selected from the plurality of different prosthetic socks.

14. The mobile computing device of claim 13, wherein the indication is selected from the group consisting of:

an auditory indicator, a visual indicator, and a tactile indicator.

15. The mobile computing device of claim 13, further comprising:

a communication unit operable to receive information communicated from a data collection unit associated with the patient.

16. The mobile computing device of claim 15, wherein the information communicated from the prosthetic sock monitoring system includes information identifying at least one characteristic of a prosthetic sock currently being worn by the patient, and the processor is operable to determine when the patient should wear a particular prosthetic sock based on the sock currently being worn by the patient.

17. The mobile computing device of claim 15, wherein the information communicated from the prosthetic sock monitoring system includes information indicating the amount of force applied to a force sensing device coupled to a prosthetic sock currently being worn by the patient, and the processor is operable to determine when the patient should wear a particular prosthetic sock based on the amount of force applied to the force sensing device.

18. A prosthetic sock for disposition over residual limb of a patient and insertion into a socket of prosthesis associated with the patient, the prosthetic sock comprising:

material shaped to fit over at least a portion of the residual limb of the patient and of a thickness adapted for inserting the residual limb into the socket of the prosthesis while the sock is fitted over the residual limb; and

one or more displacement sensors operable for determining at least a distance between the prosthetic sock and the socket.

19. The prosthetic sock of claim 18, wherein the one or more displacement sensors are further operable to communicate the at least the distance to a computing device separate from the prosthetic sock.

20. The prosthetic sock of claim 18, wherein the sensor is provided at a predetermined location on or in the material, the predetermined location being associated with the placement of an antenna located in the socket of the prosthesis.

21. The prosthetic sock of claim 18, wherein at least one of the one or more displacement sensors is coupled to an interior surface of the prosthetic sock and operable for determining at least a distance between the interior surface of the prosthetic sock and the socket.

22. The prosthetic sock of claim 18, wherein the one or more displacement sensors are embedded within the prosthetic sock.

23. The prosthetic sock of claim 18, wherein at least one of the one or more displacement sensors is coupled to an exterior surface of the prosthetic sock and operable for determining at least a distance between the exterior surface of the prosthetic sock and the socket.