Manual Implantable Drug Pump for Precise Dosing Without Batteries
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Solution Overview
Problem
Existing implantable drug delivery devices face challenges such as increased volume due to internal components like batteries and controllers, rapid drug release after implantation, and inability to control drug amount and schedule externally.
Innovation Solution
An implantable manual control drug delivery device with a drug storage, drug release actuator, and housing that allows for precise control of drug administration through a manual control button, eliminating the need for internal batteries and enabling external control of drug release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If implantable devices use batteries and electronic circuits to control drug release, then drug release control capability is improved, but device volume increases
Solution Approach 1:
The patent removes the battery and electronic circuit components from the implantable device, extracting the power source and control system entirely. Instead, it uses a purely mechanical spring-loaded piston system that can be actuated externally through the skin, thereby reducing device volume while maintaining drug release control capability.
Solution Approach 2:
The patent replaces the electronic control system with a mechanical system. A spring-loaded piston mechanism is used to deliver precise volumes of drug, actuated by an external button press that transmits mechanical force through the skin to the implant. This mechanical substitution eliminates the need for batteries and electronic circuits.
2Duration of action of moving object
If implantable devices use diffusion-based sustained release, then long-term drug delivery is improved, but drug release amount control is worsened
Solution Approach 1:
The patent transitions from passive diffusion-based sustained release to an active, dynamic mechanical pump system. The spring-loaded piston can be actuated on-demand to deliver precise volumes of drug, allowing both long-term delivery capability and precise control over the amount released at each administration event.
Solution Approach 2:
The patent changes the operating parameter from passive diffusion rates to active mechanical displacement volume. By controlling the piston stroke distance and cross-sectional area, the exact volume of drug delivered can be precisely controlled and reproduced across multiple administrations.
3Adaptability or versatility
If implantable devices include internal control components, then drug administration control is improved, but device complexity increases
Solution Approach 1:
The patent extracts all electronic control components, batteries, and complex mechanical assemblies from the implantable device. The remaining implant is a simple drug reservoir connected to a spring-loaded piston, controlled by a simple external button press, thereby reducing device complexity while maintaining administration control.
Solution Approach 2:
The spring-loaded piston system is pre-loaded and self-contained, requiring no external power source or complex control mechanisms. The system performs its function automatically upon simple external actuation, eliminating the need for complex internal control components.
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 device enables precise control of drug delivery and schedule post-implantation, reduces device size, and eliminates the need for external power sources, making it economically feasible and convenient for patients.
Implementation Method 1
a spring actuator connected to the manual control button and configured to apply a pressure to the drug chamber
Data Source
AI summary
The present disclosure relates to an implantable drug delivery device including a manual control actuator that allows a patient to self-administer a fixed amount of a drug at a desired time. By controlling a drug level, the volume inside a drug chamber, the number of actuations, and the like, a device of the present disclosure allows a drug to be precisely controlled and delivered from the outside after the device is implanted in vivo, and thus it is convenient to control a drug administration schedule. Also, since a battery is not required, and internal control devices for electromagnetic control become unnecessary, it is more patient-friendly and economically feasible.