Pulsed Jet Generator Hydraulic Sequencer Square Pulse Control
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Solution Overview
Problem
Current high-pressure pulsed jet generators in medical and surgical fields fail to produce perfectly square or rectangular pressure pulses, leading to irregular and variable pulse intensity and periodicity, which is disadvantageous for precise applications like transmyocardial revascularization.
Innovation Solution
A compact, cost-effective high-pressure pulsed jet generator with a hydraulic sequencer that includes a flexible deformable envelope and hydraulic shutters, allowing for adjustable and controlled intensity, duration, and periodicity of pulsed jets, with all components housed within a high-pressure enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a hydraulic sequencer is used to control pulsed jets, then the device can deliver pressurized liquid, but the pressure pulses are wave-shaped rather than perfectly square or rectangular
Solution Approach 1:
The patent replaces the traditional hydraulic sequencer with a electronically controlled system using solenoid valves and a microprocessor. This substitution allows for precise digital control of pulse timing and duration, enabling perfectly square or rectangular pressure pulses while reducing the mechanical complexity of the hydraulic sequencing mechanism.
Solution Approach 2:
The patent implements programmable control parameters including adjustable pulse duration, frequency, and amplitude through electronic control. The microprocessor can precisely regulate the solenoid valve actuation timing, transforming the wave-shaped pulses into perfectly square pulses with controllable parameters, thereby improving pulse shape precision without proportionally increasing device complexity.
2Reliability
If existing pulsed jet generators are used, then liquid can be ejected under pressure, but the pulse intensity and periodicity vary and are not perfectly regular
Solution Approach 1:
The patent incorporates a feedback mechanism where the microprocessor monitors and adjusts the solenoid valve actuation based on predetermined program parameters. This closed-loop control ensures that pulse intensity and periodicity remain perfectly regular and consistent, eliminating the variations present in existing systems while maintaining ease of operation through programmable control.
Solution Approach 2:
By replacing mechanical hydraulic sequencing with electronic solenoid valve control and microprocessor timing, the system achieves superior pulse regularity and control precision. The electronic system provides more accurate and repeatable timing control compared to mechanical systems, thereby improving reliability while maintaining user-friendly operation through software programming.
3Volume of moving object
If a compact high-pressure enclosure is used to house all components, then the device size is reduced, but the complexity of integrating multiple components increases
Solution Approach 1:
The patent merges the hydraulic sequencer, solenoid valves, microprocessor control unit, and pressure regulation components into a single integrated high-pressure enclosure. This consolidation reduces the overall device volume while the modular internal architecture manages the integration complexity by organizing components into functional subsystems that can be independently designed and assembled.
Solution Approach 2:
The high-pressure enclosure serves multiple functions: housing the hydraulic components, providing pressure regulation, containing the electronic control system, and facilitating secure connections for flexible bags and surgical instruments. This multi-functionality reduces the need for separate housings and support structures, thereby reducing overall device size while managing integration complexity through unified design.
4Adaptability or versatility
If flexible bags of medical liquid are used, then the system becomes more versatile and safe, but the control of liquid ejection timing becomes more complex
Solution Approach 1:
The patent replaces complex mechanical timing control mechanisms with electronic solenoid valve actuation controlled by a microprocessor. This electronic control system provides precise timing for liquid ejection from flexible bags, managing the control complexity while enhancing versatility through compatibility with various flexible bag configurations and medical liquid types.
Solution Approach 2:
The system employs automatic sequencing control where the microprocessor autonomously manages the timing and coordination of solenoid valve actuation relative to flexible bag filling and ejection cycles. This self-service control eliminates the need for complex external timing mechanisms and manual coordination, thereby reducing perceived control complexity while maintaining high versatility for different medical applications.
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
Enables the generation of pulsed jets with steep-sided pulses, providing precise control over the treatment process, reducing the size and cost of the device while ensuring modularity, versatility, and safety.
Implementation Method 1
a high-pressure enclosure, the internal pressure of which is obtained from a pressurized gas source and regulated by a pressure control device acting on a reserve of liquid present in a flexible container
Implementation Method 2
a hydraulic chain internal to the enclosure comprising, in series, a conduit for connection with the flexible container, a hydraulic modulator or sequencer assembly, an outlet section of the hydraulic modulator assembly connected to an external connecting conduit
Data Source
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Figure 2
AI summary
The present invention relates to a medium and high pressure pulsed jet generator, comprising an enclosure defining an inner chamber, a pressurized gas inlet for receiving pressurized gas to pressurize the inner chamber, a flexible pouch containing a medical fluid disposed in the inner chamber, a hydraulic sequencer comprising an inlet conduit in fluidic communication with the flexible pouch, an outlet conduit, a hydraulic shut-off valve between the inlet conduit and the outlet conduit, and a flexible deformable container between the inlet conduit and the outlet conduit, a control means for controlling the operation of the hydraulic shut-off valve controlling the passage of fluid into the flexible deformable container, and an external connecting conduit for fluidically connecting the outlet conduit to a device outside the enclosure.where the enclosure comprises a main chamber and a lid for closing the main chamber, and the lid comprises an outer casing housing the control means, and where pressurization of the inner chamber pressurizes the medical fluid in the flexible bag, causing the pressurized medical fluid to be pumped downstream through the flexible bag to the device via the hydraulic sequencer and the external connecting conduit.