Powered Fluid Injector Dynamic Test Injection Control
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Solution Overview
Problem
Conventional powered fluid injectors lack the capability to vary fluid delivery rate and perform multi-phase test injections, limiting their effectiveness in ensuring proper blood vessel access during medical procedures.
Innovation Solution
A powered fluid injector system that allows adjustable fluid delivery rates and multi-phase test injections, enabling clinicians to select and vary flow rates and volumes for both single-phase and multi-phase test procedures, enhancing the accuracy of blood vessel access testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed volume and fixed delivery rate are used for test injection, then the device complexity is reduced and ease of operation is improved, but the measurement precision and reliability of blood vessel access testing deteriorate
Solution Approach 1:
The system transitions from fixed, static injection parameters to dynamic, adjustable parameters. The powered fluid injector allows real-time modification of delivery rate and volume during the test injection procedure, enabling the system to adapt to observed vessel response and optimize testing accuracy without requiring multiple separate devices.
Solution Approach 2:
The invention implements the ability to change critical parameters (fluid delivery rate and volume) during the test injection process. This allows clinicians to adjust parameters based on real-time observations of vessel patency and response, thereby improving measurement precision while the system manages the complexity through integrated control mechanisms.
2Reliability
If a single-phase test injection is performed, then the procedure time is reduced and productivity is improved, but the reliability of assessing vessel access under varying flow conditions deteriorates
Solution Approach 1:
The system implements multi-phase test injections where different flow rate conditions are applied in sequence within a single continuous procedure. This periodic variation in injection parameters allows comprehensive assessment of vessel access reliability under different conditions while maintaining procedural efficiency through automated transitions between phases.
Solution Approach 2:
The system performs preliminary test injections at different phases and flow rates before committing to the full diagnostic procedure. This allows clinicians to assess vessel access reliability under various conditions in advance, ensuring safe progression to higher flow rates while minimizing overall procedure time through structured phase progression.
3Adaptability or versatility
If fluid delivery rate is fixed during test injection, then the ease of operation is improved and device complexity is reduced, but the adaptability to different vessel conditions and the reliability of testing deteriorate
Solution Approach 1:
The powered fluid injector transforms the static fluid delivery system into a dynamic one where delivery rate can be adjusted during the procedure. This enables the system to adapt to different vessel conditions (patent, partially occluded, occluded) by modifying flow parameters in real-time, while the integrated control system manages the added complexity through automated protocols.
Solution Approach 2:
The system is designed to perform multiple functions within a single device: it can conduct test injections at varying flow rates, assess different vessel conditions, and provide comprehensive patency evaluation. This multi-functionality achieves high adaptability to different clinical scenarios while consolidating capabilities into one integrated platform rather than requiring multiple specialized devices.
Data Source
AI summary
A fluid injector system has a controller for operably controlling the injection of contrast and/or saline into a patient. The controller allows a user to program a diagnostic injection procedure having one or more phases according to which the contrast and/or saline will be injected into the patient so as to effect enhancement of a region thereof during an imaging procedure. It further allows the user to program a test injection procedure to be performed prior to the diagnostic injection procedure. The test injection procedure is implementable as: (a) a variable single phase test injection in which the rate at which the saline is to be delivered is selectable prior to and may be varied during performance thereof; and/or (b) a multi-phase test injection in which the rate at which the saline is to be delivered is selectable for each phase of the multi-phase test injection prior to performance thereof.