Drug Delivery Pump Drive Mechanism for Variable Rate Control
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Solution Overview
Problem
Current ambulatory infusion devices for parenteral drug delivery are expensive, difficult to program, bulky, fragile, and not cost-effective, limiting their accessibility and convenience for patients and healthcare providers, while manually operated syringes and injection pens lack precision and universality in drug delivery.
Innovation Solution
A drug delivery pump system with a multi-function drive mechanism that allows for controlled, adjustable, and programmable delivery of drug substances, featuring a power and control system, needle insertion mechanism, and integrated status indication, enabling variable rate delivery and user-friendly operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ambulatory infusion pumps are used for controlled drug delivery, then delivery precision and reliability are improved, but device complexity, cost, and bulkiness increase
Solution Approach 1:
The pump device is divided into modular components: a reservoir assembly, a drive mechanism, a control system, and a delivery needle assembly. This segmentation allows each component to be optimized independently while maintaining overall system precision, reducing the complexity burden of any single component.
Solution Approach 2:
The drive mechanism automatically advances the plunger based on pre-programmed delivery profiles without requiring manual intervention during operation. The control system self-regulates flow rates and timing, eliminating the need for complex manual programming interfaces and reducing operational complexity.
2Reliability
If programmable infusion capabilities are added, then therapeutic efficacy is improved, but ease of operation deteriorates
Solution Approach 1:
Delivery profiles, flow rates, and timing parameters are pre-programmed into the control system before patient use. The device automatically executes these pre-set programs, eliminating the need for patients or caregivers to perform complex programming operations while maintaining reliable therapeutic delivery.
Solution Approach 2:
The control system incorporates sensors that monitor actual drug delivery and provide feedback to adjust operations in real-time. This automated feedback loop ensures therapeutic efficacy without requiring manual monitoring or adjustment by the user, maintaining ease of operation.
3Reliability
If continuous infusion capability is provided, then therapeutic effectiveness is improved, but patient mobility and lifestyle are compromised
Solution Approach 1:
The device features a compact, lightweight design with a flexible delivery mechanism that can be positioned at various locations on or near the patient's body. The drive mechanism and reservoir can be oriented in different configurations, allowing the patient to move freely while maintaining effective drug delivery.
Solution Approach 2:
The device replaces traditional gravity-dependent infusion systems with an actively controlled drive mechanism that uses minimal mechanical components. This substitution reduces the bulk and weight of the system while maintaining continuous infusion capability, improving patient mobility.
4Reliability
If sophisticated flow rate control is implemented, then drug efficacy is improved, but device cost and maintenance requirements increase
Solution Approach 1:
The drive mechanism utilizes pneumatic or hydraulic principles to control plunger movement and drug flow rates. By using pressure differentials and fluid dynamics rather than complex mechanical gear systems, the device achieves sophisticated flow control at lower manufacturing cost and with simpler maintenance requirements.
Solution Approach 2:
The control system adjusts delivery parameters such as flow rate, pressure, and timing by changing operational settings rather than requiring physical component changes. This allows sophisticated control capabilities to be achieved through software parameter adjustment rather than expensive hardware modifications.
Data Source
AI summary
Power and control systems for a drug delivery device allow for the activation, control of, and communication with the drug delivery device. The power and control system allows for a delay between device activation, and optionally needle insertion, and commencing drug delivery. The delay may be for a predetermined time. In addition, the power and control system may communicate with one or more external sensors and devices. The inputs from the sensors and devices may automatically, or on demand, adjust the delivery parameters of the device. The power and control systems may control a drive system that delivers a fluid at a variable rate or profile, allowing for the delivery to be tailored to maximize the effectiveness of the treatment.