Title

The Effect Of Current Level On Angle Of Ankle Extension In Euthenized Frogs Treated With High Voltage Pulsed Current

Author(s)

Robert Gradel

School Name

Chapin High School

Grade Level

12th Grade

Presentation Topic

Engineering

Presentation Type

Non-Mentored

Oral Presentation Award

4th Place

Abstract

This engineering project is a continuation of previous research, which focused on producing a more economically attainable Functional Electrical Stimulation (FES) device for the treatment of neuropathy. The device has been redesigned to produce a waveform comparable to that of the typical high-voltage pulsed current (HVPC) waveform, which is more conducive to muscle contraction. HVPC is a means of electrical stimulation which provides high currents for short durations in order to initialize an action potential to create quick and targeted muscle contractions. The prototype reduces cost by altering the method of determining the timing of the pulse with relation to the timing of the patient's stride. It uses a microprocessor and a momentary switch to determine when to deliver the stimulating pulse. A second circuit stores high voltage in two capacitors whose discharge is toggled by MOSFET transistors used as ground switches. When the microprocessor delivers an output, the base is electrified and the connection to ground is completed. Testing and development was completed on euthenized lab dissection frogs and focused on optimizing the angle of knee extension. Based on the results of this test, it is estimated that the prototype offers a 90% discount over current solutions, while maintaining comparable functionality, thus allowing patients to affordably receive the treatment necessary.

Location

Owens G08

Start Date

4-16-2016 10:00 AM

COinS
 
Apr 16th, 10:00 AM

The Effect Of Current Level On Angle Of Ankle Extension In Euthenized Frogs Treated With High Voltage Pulsed Current

Owens G08

This engineering project is a continuation of previous research, which focused on producing a more economically attainable Functional Electrical Stimulation (FES) device for the treatment of neuropathy. The device has been redesigned to produce a waveform comparable to that of the typical high-voltage pulsed current (HVPC) waveform, which is more conducive to muscle contraction. HVPC is a means of electrical stimulation which provides high currents for short durations in order to initialize an action potential to create quick and targeted muscle contractions. The prototype reduces cost by altering the method of determining the timing of the pulse with relation to the timing of the patient's stride. It uses a microprocessor and a momentary switch to determine when to deliver the stimulating pulse. A second circuit stores high voltage in two capacitors whose discharge is toggled by MOSFET transistors used as ground switches. When the microprocessor delivers an output, the base is electrified and the connection to ground is completed. Testing and development was completed on euthenized lab dissection frogs and focused on optimizing the angle of knee extension. Based on the results of this test, it is estimated that the prototype offers a 90% discount over current solutions, while maintaining comparable functionality, thus allowing patients to affordably receive the treatment necessary.