Pulse Infusion Device with Bidirectional Pump
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current infusion pumps are inadequate for administering large volumes of anesthetic medication at high velocities required for regional/local anesthesia, as they fail to generate sufficient pressure and are not designed for rapid infusion through thin and long catheters.
Innovation Solution
A pulse infusion system with a bidirectional pump and internal reservoir, capable of delivering a volume of at least 2 ml at a velocity of 5 ml/min, equipped with a controller to set and control the volume, frequency, and velocity of infusion pulses, along with check valves to prevent backflow and gravity-induced flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional infusion pumps are used to administer anesthetic medication, then the pump can provide continuous flow, but the pump cannot generate sufficient pressure for rapid infusion through thin and long catheters
Solution Approach 1:
The system employs periodic pulsatile action instead of continuous flow. The pump delivers medication in controlled pulses at frequencies of 1-10 pulses per minute, with each pulse providing high pressure (up to 2.0 bar) to overcome catheter resistance. This periodic delivery allows sufficient pressure buildup during each pulse while maintaining acceptable average flow rates, resolving the contradiction between pressure generation and infusion velocity.
Solution Approach 2:
The system dynamically adjusts flow characteristics by varying pulse frequency, amplitude, and duration. The pump can adapt its output to match changing clinical requirements, providing high pressure when needed for catheter penetration and adjusting to maintain stable average flow rates. This dynamic control enables the system to overcome the static limitations of conventional pumps.
2Quantity of substance
If large volumes of medication are infused rapidly, then sufficient nerve bathing is achieved for effective pain block, but conventional pumps cannot deliver the required volume and velocity simultaneously
Solution Approach 1:
The pulsatile delivery system accumulates medication volume during the filling phase of each pulse cycle, then releases it rapidly during the ejection phase. This allows the system to deliver large volumes (e.g., 2 ml or more per pulse) at high velocities (at least 5 ml/min) that would be impossible with continuous flow pumps, achieving sufficient nerve bathing while overcoming catheter flow limitations.
3Stability of the object's composition
If continuous flow infusion is used, then steady medication delivery is maintained, but the system cannot simulate manual injection characteristics required for effective regional anesthesia
Solution Approach 1:
The system combines periodic pulsatile action with programmable control to achieve both stability and flexibility. Each pulse provides a controlled, repeatable delivery pattern that simulates manual injection characteristics, while the overall system maintains stable average flow rates through regulated pulse frequency and amplitude. This allows the system to adapt to different clinical scenarios while maintaining consistent medication delivery.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor and adjust pulse parameters, ensuring consistent delivery patterns that replicate manual injection characteristics. This feedback control maintains flow stability while allowing programmable variation in pulse frequency and amplitude to match different anesthesia requirements.
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 system provides a stable and accurate average flow rate for continuous nerve bathing, effectively maintaining pain blockage and improving post-operative pain therapy by delivering large volume pulses at low frequency.
Implementation Method 1
a bidirectional pump configured to pump infusion fluid from the external reservoir to the internal reservoir and further pump an infusion fluid pulse from the internal reservoir to be infused through a catheter
Implementation Method 2
The tubing system may further include a check valve proximate to the inlet
Implementation Method 3
an anti-siphon check valve proximate to the outlet
Data Source
AI summary
A method and a system are described for administrating an infusion liquid pulse. The system includes a tubing system having an inlet connected to an external reservoir adapted to contain infusion fluids and an outlet connected to a catheter. The tubing system includes a check valve proximate to the inlet and an anti-siphon valve proximate to the outlet. The system further includes an automatic pulse flow generation device. The automatic pulse flow generation device includes an internal reservoir and a bidirectional pump configured to pump infusion fluid from the external reservoir to the internal reservoir and further pump an infusion fluid pulse from the internal reservoir to be infused by a catheter, the infusion liquid pulse has a volume of at least 2 ml and a velocity of at least 5 ml/min.