Drug Delivery Programming for Smooth Transition Control
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Solution Overview
Problem
Implantable fluid delivery devices face challenges in smoothly transitioning between different drug delivery sources, concentrations, or types, often resulting in overdosing or underdosing due to abrupt changes, which can be harmful to patients.
Innovation Solution
A system that calculates and controls the delivery parameters for a mixture of fluids, including flow rate and transition time, to ensure a consistent therapeutic agent dosage by determining the concentration profile and adjusting delivery schedules dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If abrupt transitions between different drug delivery sources or concentrations are implemented, then device complexity is reduced, but dosing accuracy deteriorates resulting in overdosing or underdosing
Solution Approach 1:
The system performs preliminary calculations of fluid mixing characteristics and transition parameters before initiating the transition. The processor determines the concentration profile of mixed fluid and calculates appropriate delivery parameters in advance, allowing the transition to proceed with predetermined safety margins rather than requiring complex real-time adjustments.
Solution Approach 2:
The patent introduces an intermediary transition period with mixed fluid delivery between two different drug sources or concentrations. This intermediate state allows gradual transition while maintaining therapeutic efficacy, acting as a buffer that prevents abrupt changes and their associated dosing errors.
2Manufacturing precision
If transition period with fluid mixture delivery is implemented, then dosing accuracy is improved, but loss of time increases due to extended transition duration
Solution Approach 1:
The system dynamically adjusts delivery parameters including flow rate, transition duration, and mixing ratio based on the specific drug properties, patient requirements, and desired transition characteristics. By optimizing these parameters, the system achieves accurate dosing during transition while minimizing the time required for the transition period.
3Manufacturing precision
If different delivery parameters are used for mixed fluid during transition, then dosing accuracy is improved, but device complexity increases due to additional control requirements
Solution Approach 1:
The system incorporates feedback mechanisms where the processor continuously monitors delivery parameters and adjusts the pump operation accordingly. This feedback loop ensures that the actual delivered dose matches the intended dose despite variations in fluid mixing, maintaining dosing accuracy while automating the control complexity.
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
This approach minimizes the risk of overdosing or underdosing during transitions by accurately calculating the delivery parameters for the mixed fluid, ensuring a consistent therapeutic effect and patient safety.
Implementation Method 1
a mixture of the two fluids may occur at the interface between both fluids
Implementation Method 2
determining the concentration profile and adjusting delivery schedules dynamically
Data Source
AI summary
Devices, systems, and techniques for programming drug delivery are described. Such techniques may account for diffusion and mixing of drug within the fluid or allow for more flexible programming options. In one example, a method may include determining one or more fluid delivery parameters (e.g., volume, flow rate, or period of time) for a fluid that is a mixture of two other fluids. The determination may be based on one or more fluid delivery parameters of the two other fluids and/or a concentration profile representing the mixing between the two other fluids. In other examples, drug delivery programming may be facilitated by the selection of various patterns and steps of drug delivery. The system may track volume of delivered fluid to maintain desired dosing of the patient.