Multi-device patient ambulation system

Abstract

Various embodiments of an ambulation and movement assist system are disclosed. For example, an ambulation system for a patient may comprise an exoskeleton device attached to the patient, an FES device at least partially implanted in the patient, and a biological interface apparatus. The biological interface apparatus comprises a sensor having a plurality of electrodes for detecting multicellular signals, a processing unit configured to receive the multicellular signals from the sensor, process the multicellular signals to produce a processed signal, and transmit the processed signal to a controlled device. At least one of the exoskeleton device and the FES device is the controlled device of the biological interface apparatus.

Description

[0001] This application claims the benefit of priority under 35 U.S.C. § 119(e) of U.S. Provisional Application No. 60 / 641,986, filed Jan. 6, 2005. This application relates to commonly assigned U.S. application Ser. No. ______ of J. Christopher Flaherty et al., entitled “NEURALLY CONTROLLED PATIENT AMBULATION SYSTEM” and filed on the same date as the present application. The complete subject matter of the above-referenced applications is incorporated by reference herein.FIELD OF THE INVENTION [0002] The present invention relates to medical devices and related methods. More particularly, various embodiments relate to ambulation and movement assist systems. The systems may include a biological interface apparatus and a movement assist apparatus, such as an ambulation assist apparatus. The biological interface apparatus may include one or more devices controlled by processed multicellular signals of a patient. A processing unit produces a control signal based on multicellular signals r...

AI Technical Summary

Benefits of technology

"The patent describes an ambulation system for patients that includes a biological interface apparatus and an exoskeleton device or a Functional Electrical Stimulation (FES) device. The biological interface apparatus collects multicellular signals from the patient and sends them to a controlled device. The exoskeleton device provides support to the patient while the FES device helps move the patient's limbs. The system also includes a movement assist apparatus that can be a patient walker or a cane, which helps the patient move from a sitting to a standing position. The data collected by the biological interface apparatus is used to improve performance and safety, and to detect potentially dangerous situations. The system can be controlled by the biological interface apparatus, the exoskeleton device, or the FES device. Overall, the system helps improve the patient's mobility and quality of life."

Problems solved by technology

Early attempts to utilize signals directly from neurons to control an external prosthesis encountered a number of technical difficulties.

The ability to identify and obtain stable electrical signals of adequate amplitude was a major issue.

Another problem that has been encountered is caused by the changes that occur to the neural signals that occur over time, resulting in a degradation of system performance.

Neural interface systems that utilize other neural information or other neural data, such as electrocorticogram (ECoG) signals, local field potentials (LFPs) and electroencephalogram (EEG) signals have similar issues to those associated with individual neuron signals.

Since all of these signals result from the activation of large groups of neurons, the specificity and resolution of the control signal that can be obtained is limited.

Commercialization of these neural interfaces has been extremely limited, with the majority of advances made by universities in a preclinical research setting.

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