Implantable Pump for Precise CSF Flow Regulation
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Solution Overview
Problem
Existing CSF removal devices lack the ability to closely monitor and precisely regulate the flow of cerebrospinal fluid, making it difficult for physicians to optimally adjust the device's operation for individual patient needs.
Innovation Solution
A subcutaneously implantable device with a fluid pump, electric motor, and control circuitry that includes sensors for pressure and flow rate, allowing for wireless telemetry and precise control of CSF removal, along with a rechargeable battery and failsafe mechanisms for continuous operation and data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional CSF shunts are used, then CSF removal is achieved, but the ability to monitor and regulate flow is insufficient
Solution Approach 1:
The patent embeds multiple functional components within a single implantable pump device: pressure sensors, flow sensors, control circuitry, and telemetry systems are all integrated into the pump housing. This nested arrangement enables precise monitoring and regulation of CSF flow while maintaining a compact implantable form factor, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The device incorporates pressure sensors and flow sensors that continuously monitor CSF pressure and flow rate, feeding this data back to the control circuitry. The controller adjusts pump operation based on this feedback to maintain precise control over CSF removal, achieving high measurement precision without requiring overly complex external monitoring systems.
2Adaptability or versatility
If precise control of CSF removal is implemented, then treatment optimization is enabled, but device complexity increases
Solution Approach 1:
The patent implements dynamic control capabilities where the pump operation can be adjusted in real-time based on patient needs. The control circuitry receives input from pressure and flow sensors, and the telemetry system allows remote programming of pump parameters. This dynamic adaptability enables treatment optimization while keeping the device architecture relatively simple through modular design.
Solution Approach 2:
The implantable pump device performs multiple functions: CSF removal, pressure monitoring, flow monitoring, data storage, and wireless telemetry. By combining these functions into a single multi-functional device rather than separate components, the patent achieves high adaptability for treatment optimization while managing overall device complexity through integration.
3Reliability
If continuous monitoring and regulation is provided, then treatment effectiveness improves, but energy consumption increases
Solution Approach 1:
The patent employs periodic sensing and telemetry transmission rather than continuous operation. The pressure and flow sensors take periodic measurements, and the telemetry system transmits data at scheduled intervals or when threshold changes are detected. This periodic action maintains reliable monitoring and regulation while significantly reducing energy consumption compared to truly continuous operation.
Solution Approach 2:
The device incorporates autonomous operation where the control circuitry automatically adjusts pump function based on sensor input without requiring constant external intervention. The internal memory stores operational data and the telemetry system autonomously communicates with external devices. This self-service capability ensures reliable continuous monitoring while minimizing energy use by avoiding unnecessary active transmissions.
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
Enables continuous, precise monitoring and regulation of CSF removal, allowing physicians to optimize treatment by adjusting the volume and frequency of CSF removal based on real-time data, ensuring safe and effective operation of the device.
Implementation Method 1
An electric motor is mounted inside the housing and is operatively coupled to the pump actuator
Implementation Method 2
A battery mounted inside the housing provides power to the electric motor and to the device control circuitry
Data Source
AI summary
A device and system for removing cerebrospinal fluid (CSF) from a CSF space within a patient's body includes a housing adapted for implantation into a subcutaneous body space remote from the CSF space. A fluid pump is mounted inside the device housing. The pump has a pump actuator, a fluid inlet extending through the housing wall and a fluid outlet extending through the housing wall. A battery-powered electric motor is mounted inside the housing and is operatively coupled to the pump actuator. Device control circuitry controls operation of the electric motor. The device control circuitry includes a processor responsive to CSF space pressure signals, outflow pressure signals, and CSF flow rate signals to calculate CSF space pressures, CSF outflow pressures, and CSF removal volumes. A telemetry unit includes a transmitter to wirelessly transmit pump data and a receiver to receive external operational commands.