Electroosmotic Drug Injection Control for Adaptive Basal Dosing
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Solution Overview
Problem
Existing insulin pumps struggle to flexibly adjust drug injection based on changes in user activity levels, leading to fluctuations in blood sugar levels and potential blockages in the injection flow path.
Innovation Solution
A drug injection device utilizing an electroosmotic pump that alternates between negative and positive pressure to suck and discharge drugs, controlled by a controller that switches between first and second speed-based injection sequences based on predetermined events, allowing for adjustments in drug amount and injection speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drug injector uses a fixed basal injection mode to maintain blood sugar level, then the blood sugar level can be maintained consistently, but the injection cannot be flexibly adjusted when user activity level changes
Solution Approach 1:
The patent implements dynamic injection mode switching that allows the system to transition between basal injection mode and temporary basal injection mode based on user activity level changes. The controller detects activity level variations and automatically adjusts injection parameters, enabling the system to adapt to changing physiological conditions while maintaining reliable blood sugar control through structured mode transitions
2Productivity
If the injection speed is increased to deliver drug faster, then the injection time is reduced, but the risk of flow path blockage increases
Solution Approach 1:
The patent employs periodic pressure variation through alternating positive and negative pressure phases during drug injection. The controller generates pulse signals that create periodic pressure changes in the electroosmotic pump, enabling the drug to be injected in controlled bursts rather than continuous high-speed flow, thereby reducing flow path blockage risk while maintaining effective injection speed
Solution Approach 2:
The patent utilizes electroosmotic pump technology that generates pressure differentials to drive drug flow through the injection system. By controlling the pressure gradient and using alternating positive/negative pressure cycles, the system achieves reliable drug delivery with reduced risk of flow path obstruction compared to constant high-pressure injection
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 effectively maintains stable blood sugar levels by adjusting drug injection according to changes in user activity or blood sugar levels, minimizing flow path blockages and ensuring accurate drug delivery.
Implementation Method 1
a drug injector configured to electrochemically drive an electroosmotic pump to suck a drug from a drug storage and discharge the sucked drug to an injection target
Implementation Method 2
the electroosmotic pump alternately generates negative pressure and positive pressure in response to the control signal to suck and discharge the drug
Data Source
AI summary
A drug injection device according to the present disclosure includes: a drug injector configured to electrochemically drive an electroosmotic pump to suck a drug from a drug storage and discharge the sucked drug to an injection target; and a controller configured to output, to the drug injector, a control signal corresponding to an injection sequence determined according to an injection mode, wherein when a predetermined event occurs, the controller stops an operation based on a first speed-based injection sequence for a basal injection mode and outputs a control signal corresponding to a second speed-based injection sequence for a temporary basal injection mode, and the electroosmotic pump alternately generates negative pressure and positive pressure in response to the control signal to suck and discharge the drug.