Fluid Injector Pressure Limiting Control
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Solution Overview
Problem
Current fluid injector systems have pre-programmed pressure limits that can be exceeded, leading to abrupt reductions in fluid flow, which may necessitate procedure abortion and repetition, as they lack user- or system-configurable pressure limiting behavior to suit specific medical procedures.
Innovation Solution
A fluid injector system with a user interface and control device that allows for customizable pressure limiting behavior through inputs such as maximum pressure limits, fluid flow rates, and pressure sensitivity settings, enabling prioritization of flow rate maintenance or pressure limitation based on patient and procedural parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-programmed pressure limits are used to prevent catheter failure, then patient safety is improved, but fluid flow rate is significantly reduced when pressure limit is breached
Solution Approach 1:
The system dynamically adjusts pressure limit thresholds based on real-time monitoring of fluid pressure, flow rate, and procedural context. Instead of using fixed pre-programmed limits, the system adapts the pressure threshold to maintain safety while preserving flow rate, resolving the contradiction between patient safety and productivity
Solution Approach 2:
The system changes the pressure limit parameter dynamically based on multiple input factors including fluid viscosity, catheter type, and real-time pressure readings. This parameter adaptation allows the system to maintain safety margins while avoiding unnecessary flow rate reductions, thereby resolving the contradiction between reliability and productivity
2Device complexity
If pre-programmed pressure limits are hard-coded into the system, then device complexity is reduced, but adaptability to different injection procedures is worsened
Solution Approach 1:
The system performs self-configuration by automatically determining appropriate pressure limits based on inputs from the control device, patient information, and real-time monitoring. This eliminates the need for manual programming while providing customized pressure limiting behavior for different procedures, resolving the contradiction between device complexity and adaptability
Solution Approach 2:
The system pre-establishes a framework for pressure limit determination that includes default safety margins and configurable parameters. This preliminary structure reduces the need for complex hard-coding while enabling adaptability through configurable inputs, resolving the contradiction between simplicity and versatility
3Reliability
If abrupt reduction in fluid flow is used to lower pressure quickly, then pressure limit compliance is improved, but injection procedure completion is worsened
Solution Approach 1:
Instead of abruptly reducing flow rate to maximum extent, the system applies partial reduction based on how much the pressure limit is exceeded and the procedural context. This graduated response maintains pressure compliance while preserving sufficient flow rate to complete the injection procedure, resolving the contradiction between reliability and productivity
Solution Approach 2:
The system continuously monitors pressure and flow rate during the injection procedure and adjusts flow rate reduction in real-time based on feedback from these measurements. This closed-loop control ensures pressure compliance while minimizing impact on procedure completion, resolving the contradiction between reliability and productivity
Data Source
AI summary
A system and method are disclosed for user- or system-configurable and adaptive pressure limiting behavior in fluid injection systems/devices. A fluid injector system may include at least one fluid injector device, at least one user interface, and a control device comprising at least one processor. The at least on processor may be programmed or configured to: receive a maximum pressure limit for an injection procedure, receive a programmed fluid flow rate for the injection procedure, receive a maximum fluid flow rate reduction input for the injection procedure, wherein the maximum fluid flow rate reduction input is selected by a user via the at least one user interface, and receive a pressure limit sensitivity input for the injection procedure, wherein the pressure limit sensitivity input is selected by the user via the at least one user interface. The at least one processor may also be configured to control the at least one fluid injector device to perform the injection procedure based on the maximum pressure limit, the programmed fluid flow rate, the maximum fluid flow rate reduction input, and the pressure limit sensitivity input.