Constant Pressure Syringe Driver for Safe Infusion
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Solution Overview
Problem
Current infusion systems face challenges in delivering precise and safe flow rates, often resulting in excessive pressure, site reactions, and tissue necrosis due to increased pressure from blockages, and require multiple fixed flow rate tubing sets, which are cumbersome and prone to errors.
Innovation Solution
A precision matched infusion system using a calibrated disposable infusion set with a constant pressure syringe driver and a matched variable flow rate controller, eliminating the need for multiple tubing sets and providing direct flow rate indication, ensuring accurate and safe delivery of infusion fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electric infusion systems increase pressure to maintain preset flow rate, then flow rate control is improved, but site reactions and tissue necrosis occur
Solution Approach 1:
The patent changes the fundamental operating parameter from constant flow rate to constant pressure delivery. The syringe driver maintains a predetermined pressure (e.g., 5 psi) rather than forcing a preset flow rate, allowing the system to adapt to varying resistance conditions without causing tissue damage. This parameter change resolves the contradiction by prioritizing pressure control over flow rate control.
Solution Approach 2:
The system incorporates flow rate indication mechanisms that provide feedback to users about the actual delivery rate. The calibrated disposable infusion set includes markings or indicators that allow real-time monitoring of flow rate, enabling users to verify accurate delivery without requiring high-pressure forcing mechanisms.
2Measurement precision
If multiple fixed flow rate tubing sets are used, then flow rate accuracy is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent creates a universal calibrated disposable infusion set that can deliver accurate flow rates across multiple settings without requiring separate tubing sets for each flow rate. The single infusion set incorporates calibration markings and a flow rate controller that enables selection of different flow rates (e.g., 10, 20, 30, 40, 50, 60 ml/hr) within the same device, eliminating the need for multiple specialized tubing sets.
Solution Approach 2:
The system transitions from static fixed flow rate tubing to a dynamic flow rate controller that can be adjusted during infusion. The variable flow rate controller allows real-time modification of delivery rate without changing the physical tubing set, making the system adaptable to changing patient needs while maintaining accuracy.
3Adaptability or versatility
If variable flow rate controller is used, then adaptability is improved, but measurement precision deteriorates due to lack of calibration
Solution Approach 1:
The disposable infusion set is pre-calibrated during manufacturing with accurate flow rate markings and characteristics. This preliminary calibration ensures that when the variable flow rate controller is adjusted, the delivered flow rate matches the indicated rate precisely. The calibration is built into the tubing and controller relationship before use, eliminating the need for field calibration while maintaining both adaptability and precision.
4Measurement precision
If separate flow rate restriction tubing is used for each configuration, then flow rate precision is improved, but loss of time and productivity deteriorate
Solution Approach 1:
The calibrated disposable infusion set serves multiple flow rate requirements within a single device. Instead of selecting from multiple separate tubing sets, the user selects the desired flow rate using the integrated controller on the single infusion set, dramatically reducing setup time while maintaining precision.
Data Source
AI summary
Butterfly assemblies to deliver a fluid into a patient's anatomic space include a body and extensions. The body has an opening to receive a needle to penetrate into a patient's anatomic space, and the extensions are hinged to the body and movable between a closed, compact position and an expanded, open position without significant biasing forces tending to move the extensions into either position. Each extension has an outer periphery at least partially surrounding an interior surface having a locking structure to mate with the other extension and lock the extensions together in the closed, compact position.