Functional ambulation performance scoring device

• US 5,586,557 A
• Filed: 05/31/1994
• Issued: 12/24/1996
• Est. Priority Date: 05/31/1994
• Status: Expired due to Fees

• Current Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Original Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Inventors: Nelson, Arthur J., Gross, Clifford M.
• Primary Examiner(s): HINDENBURG, MAX F
• Application Number:
  US08/251,596
• Time in Patent Office: 938 Days
• Field of Search: 128/774, 128/779, 128/782, 73/172, 36/136
• US Class Current: 600/592
• CPC Class Codes: A43B 3/34 with electrical or electronic arrangements
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies

Abstract

A device comprising a system of switches and sensors placed inside a person'"'"'s footgear which send positional information through wireless telemetry from a transmitter to a receiver. This positional information is entered into a computer and processed according to prestored algorithms, yielding a non-dimensional ambulation index. This invention also comprises a method for calculating the non-dimensional ambulation index.

Claims

1. For use with a walking surface and left and right feet, a device for measuring human ambulation comprising:

(a) a left foot sensor capable of sensing when the left foot is in contact with the walking surface, the left foot sensor being activated when such contact occurs;

(b) a right foot sensor capable of sensing when the right foot is in contact with the walking surface, the right foot sensor being activated when such contact occurs;

(c) a processor having an algorithm to create an ambulation index reflective of a quantitative analysis of human ambulation;

(d) left transmission means for indicating to the processor when the left foot sensor is activated;

(e) right transmission means for indicating to the processor when the right foot sensor is activated; and

(f) output means to output the ambulation index from the processor.

2. A device for measuring human ambulation as described in claim 1 in which each of the left and right transmission means comprises a wireless transmitter, a wireless receiver, and an input port to the processor.

3. A gait measuring system comprising:

a first assembly configured to evidence an on mode and an off mode, said first assembly being in said on mode when pressure is applied to said first assembly;

a second assembly configured to evidence an on mode and an off mode, said second assembly being in said on mode when pressure is applied to said second assembly;

a timing device for comparing the time between said first and second assemblies being in said on and off modes and calculating time differentials therefrom; and

,

a processor configured to utilize said time differentials to calculate a gait measurement.

4. The system of claim 3 wherein each of said first and second assemblies comprises first and second electrical contact switches.

5. The system of claim 4 wherein said first assembly first switch is connected to a rear portion of a subject'"'"'s first shoe and said second assembly first switch is connected to a rear portion of a subject'"'"'s second shoe.

6. The system of claim 5 wherein said first assembly second switch is connected to a front portion of said subject'"'"'s first shoe and said second assembly second switch is connected to a front portion of said subject'"'"'s second shoe.

7. The system of claim 6 further comprising transmission means for transmitting information representative of the mode of each of said assemblies and receiver means for receiving said information from said transmission means, said receiver means communicating with said timing device.

8. An ambulation measuring system comprising:

first and second contact switches connected to a subject'"'"'s first shoe, each switch evidencing an on state when pressure is applied to such switch;

third and fourth contact switches connected to a subject'"'"'s second shoe, each switch evidencing an on state when pressure is applied to such switch; and

,

a computer configured to communicate with said switches, said computer including a clock and a gait measurement index;

wherein, said computer and said clock are configured to calculate a current position of a subject'"'"'s foot relative to said subject'"'"'s initial feet position, and a corresponding time, by utilizing said gait measurement index;

further wherein, said computer is configured to calculate duration of ambulation and number of steps taken over a preset distance based upon said predetermined positional and time calculations.

9. The system of claim 8 wherein said first switch is connected to a rear portion of said subject'"'"'s first shoe and said third switch is connected to a rear portion of said subject'"'"'s second shoe.

10. The system of claim 9 wherein said second switch is connected to a front portion of said subject'"'"'s first shoe and said fourth switch is connected to a front portion of said subject'"'"'s second shoe.

11. The system of claim 8 wherein said gait measurement index comprises a right side trochanter measurement and a left side trochanter measurement.

12. An ambulation measurement system for use in measuring the ambulation of a subject, the subject having first and second legs and first and second footwear appliances configured for attachment to the lower end of the subject'"'"'s first and second legs, the system comprising:

a first assembly configured for placement in the subject'"'"'s first footwear appliance, said first sensing assembly evidencing a first mode and a second mode and being configured for fluctuation between said first and second modes;

a second sensing assembly configured for placement in the subject'"'"'s second footwear appliance, said second sensing assembly evidencing a first mode and a second mode and being configured for fluctuation between said first and second modes; and

,

a processor including a clock and configured for receipt and use of information reflective of said mode of said first and second assemblies and time information associated with said fluctuation between said modes;

wherein said system is configured to provide output associated with said subject'"'"'s ambulation.

13. The system of claim 12 wherein said first sensing assembly comprises a first contact switch connected to a rear portion of said subject'"'"'s first footwear appliance.

14. The system of claim 13 wherein said first sensing assembly further comprises a second contact switch connected to a front portion of said subject'"'"'s first footwear appliance.

15. The system of claim 14 wherein said second sensing assembly comprises a first contact switch connected to a rear portion of said subject'"'"'s second footwear appliance.

16. The system of claim 15 wherein said second sensing assembly further comprises a second contact switch connected to a front portion of said subject'"'"'s second footwear appliance.

17. The system of claim 16 further comprising transmission means for transmitting information representative of the mode of each of said sensing assemblies and receiver means for receiving said information from said transmission means, said receiver means communicating with said processor.

18. The system of claim 17 wherein each of said contact switches comprises an electrical contact switch.