Muscle Stimulation Pulse Width Optimization
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Solution Overview
Problem
Existing muscle stimulation technologies using narrow pulse widths recruit the sensory system to a low level, leading to premature fatigue and require higher current levels for effective blood flow, which can be uncomfortable and inefficient.
Innovation Solution
Applying electrical pulses with wider durations (greater than 0.5 milliseconds) that more closely mimic natural muscle contractions, reducing fatigue and allowing for increased blood flow at lower current levels, while maintaining efficiency through carefully controlled pulse patterns and rest periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If narrow pulse widths are used for muscle stimulation, then the sensory system is recruited to a lower level, but this leads to premature muscle fatigue and requires higher current levels for effective blood flow
Solution Approach 1:
The patent applies parameter changes by transitioning from narrow pulse widths to wider pulse widths (greater than 0.5 milliseconds) in the electrical stimulation signals. This parameter modification allows the sensory system to be recruited more effectively, producing contractions that better represent voluntary muscle actions while reducing premature fatigue and enabling effective blood flow at lower current levels
2Ease of operation
If narrow pulse widths are used, then the device operation is simpler, but higher current levels are required which cause discomfort and reduce efficiency
Solution Approach 1:
The patent modifies the pulse width parameter to greater than 0.5 milliseconds, which changes the physiological response to stimulation. This allows effective muscle contraction and blood flow promotion at lower current levels, thereby reducing subject discomfort while maintaining efficient operation
3Device complexity
If narrow pulse widths are used, then the stimulation pattern is simpler to generate, but blood flow efficiency decreases requiring higher energy expenditure
Solution Approach 1:
The patent implements parameter changes by using wider pulse widths (greater than 0.5 milliseconds) that more closely mimic natural muscle contractions. This improves blood flow efficiency by recruiting the sensory system more effectively, allowing for reduced energy expenditure while maintaining effective venous blood pumping
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The wider pulse widths induce contractions that better represent voluntary muscle actions, reducing fatigue and increasing blood flow efficiency, allowing for effective venous blood pumping with reduced discomfort and energy expenditure.
Implementation Method 1
Applying electrical pulses with wider durations (greater than 0.5 milliseconds) that more closely mimic natural musclecontractions
Data Source
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AI summary
An apparatus for the electrostimulation of the muscles of a subject is also provided, the apparatus comprising a generator for generating a plurality of electrical pulses; means for applying the electrical pulses to the subject to induce contraction of at least one muscle of the subject; wherein the generator is operable to produce a plurality of electrical pulses each having a pulse width of at least 0.5 milliseconds.