Leadless Implantable Electroacupuncture Device Power Management
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Solution Overview
Problem
Current electroacupuncture devices are invasive and inefficient, requiring needles inserted through the skin and long insulated wires implanted into blood vessels, which limits their commercial feasibility and effectiveness for treating conditions like erectile dysfunction.
Innovation Solution
An implantable electroacupuncture device (IEAD) with a small, coin-sized housing containing a primary battery and electronic circuitry that delivers stimulation pulses to target tissue locations, such as acupoints, using a central electrode and circumferential electrode configuration, allowing for efficient and non-invasive treatment of various medical conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If needles and long insulated wires are used for electroacupuncture stimulation, then electrical stimulation can be delivered to target tissue, but the device becomes invasive and complex
Solution Approach 1:
The patent extracts and eliminates the needles and long insulated wires from the electroacupuncture system. Instead, it uses a leadless implantable device with electrodes directly integrated into the housing, which is implanted subcutaneously near the target acupoint. This removes the invasive needle insertion and complex wire implantation while maintaining electrical stimulation capability through the integrated electrodes.
Solution Approach 2:
The patent merges the electrical stimulation delivery function directly into the implantable device housing. The electrodes are integrated into the housing structure itself, combining the stimulator body and electrode contacts into a single unified unit. This eliminates the need for separate needles and wires, reducing device complexity and invasiveness while maintaining therapeutic effectiveness.
2Device complexity
If a small coin-sized device is used, then invasiveness is reduced, but power supply capacity is limited
Solution Approach 1:
The patent employs periodic pulsed electrical stimulation instead of continuous stimulation. The device delivers controlled pulses of electrical energy at specific intervals, which reduces overall power consumption while maintaining therapeutic effectiveness. This periodic action allows the small coin-cell battery to provide sufficient energy for the required treatment duration without requiring a larger power supply.
Solution Approach 2:
The patent optimizes the electrical stimulation parameters (pulse width, amplitude, frequency, and duty cycle) to match the specific requirements of electroacupuncture therapy. By carefully selecting and adjusting these parameters, the device achieves effective tissue stimulation with minimal energy consumption, enabling the use of a small battery in a compact form factor.
3Reliability
If continuous stimulation is provided, then therapeutic effect is maximized, but heat generation increases
Solution Approach 1:
The patent uses intermittent pulsed stimulation with defined duty cycles rather than continuous stimulation. The electrical pulses are delivered in periodic sequences with active stimulation phases followed by rest periods. This periodic action maintains therapeutic effectiveness by delivering sufficient total energy while allowing thermal dissipation during rest periods, thereby minimizing heat generation in the target tissue.
Solution Approach 2:
The patent achieves continuous therapeutic effect through high-frequency pulsing within the stimulation window. Although the overall stimulation is intermittent, the pulses within each active phase are delivered at frequencies that maintain continuous physiological effect on the target tissue. This approach ensures therapeutic continuity while limiting total energy delivery to prevent excessive heat generation.
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 IEAD provides effective electroacupuncture stimulation with low duty cycles and low intensity, reducing heat generation and power consumption, enabling long-term operation without significant heat or battery voltage drops, thus offering a more reliable and affordable treatment option for conditions like hypertension, depression, and erectile dysfunction.
Implementation Method 1
the pulse generation circuitry is adapted to deliver stimulation pulses to the patient's body tissue at or near the target tissue location
Data Source
AI summary
An implantable electroacupuncture device (IEAD) treats a medical condition of a patient through application of electroacupuncture (EA) stimulation pulses applied at a target tissue location, such as an acupoint. The IEAD comprises an implantable, coin-sized, self-contained, leadless electroacupuncture device having at least two electrodes attached to an outside surface of its housing. The device generates EA stimulation pulses in accordance with a specified stimulation regimen. Power management circuitry within the device allows a primary battery, having a high internal impedance, to be used to power the device. The stimulation regimen generates stimulation pulses during a stimulation session of duration T3 minutes applied every T4 minutes. The duty cycle, or ratio T3/T4, is very low, no greater than 0.05. The low duty cycle and careful power management allow the IEAD to perform its intended function for several years.


