Medical Trainer Simulator Phantom Circuit Detection
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Solution Overview
Problem
Existing medical training simulators lack the ability to provide objective and measurable feedback on the accuracy of procedures, particularly in detecting the correct insertion of medical instruments into simulated vessels, due to issues with phantom circuits caused by residual conductive fluid, which can lead to incorrect assessments during training.
Innovation Solution
A medical trainer simulator system that uses a conductive fluid-filled vessel with an electrical resistance measuring circuit to determine if a medical device has been inserted into the correct target position, excluding phantom circuits by monitoring the electrical resistance and providing visual feedback on a display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conductive fluid is used to detect needle insertion into simulated vessels, then the ability to provide objective feedback is improved, but phantom circuits caused by residual conductive fluid lead to measurement errors
Solution Approach 1:
The patent replaces simple conductive fluid detection with an electrical resistance measuring circuit that quantifies the electrical properties of the fluid. By measuring resistance values and comparing them against threshold criteria, the system distinguishes between genuine needle insertions and phantom circuits caused by residual fluid, thereby maintaining measurement precision while improving feedback reliability
Solution Approach 2:
The system implements feedback through visual indicators (such as LED lights or display screens) that provide immediate objective feedback to trainees about successful needle insertions. The feedback mechanism uses resistance threshold comparisons to ensure accuracy, displaying clear success/failure indicators that help learners understand their performance without being misled by phantom circuits
2Productivity
If residual conductive fluid remains in the simulator, then the simulator can be reused, but it causes phantom circuits that lead to incorrect assessments
Solution Approach 1:
The patent changes the detection parameter from simple conductivity presence to electrical resistance measurement with threshold criteria. By establishing resistance thresholds that account for residual fluid conditions, the system maintains accurate insertion detection even when the simulator is reused without complete fluid replacement, thereby preserving both productivity and measurement precision
Solution Approach 2:
The system performs preliminary resistance measurements and threshold establishment before actual insertion detection. This preliminary action calibrates the system to account for any residual conductive fluid present from previous uses, ensuring that subsequent measurements accurately distinguish between residual fluid and new insertions, thus maintaining detection accuracy across multiple uses
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 accurate and objective evaluation of medical procedures by ensuring that the medical device is correctly inserted into the intended vessel, reducing errors and improving training effectiveness by providing clear visual and audio indications of success or failure.
Implementation Method 1
a conductive fluid simulating a bodily fluid is disposed at the desired target position within the medical training simulator
Implementation Method 2
An electrical resistance measuring circuit is electrically coupled to the conductive fluid in the simulated body lumens and to the medical device that is to be inserted
Data Source
AI summary
A medical trainer simulator includes a plurality of simulated vessels filled with a conductive fluid representing, for example, veins or arteries. While performing a procedure using the medical trainer, a person inserts a medical instrument, e.g., a needle or scalpel, into a selected vessel, causing the medical instrument to contact the conductive fluid. A circuit board detects when a circuit is thus created by detecting an electrical current flowing through the medical instrument and the conductive fluid it has contacted. A software program executing on a computer excludes any phantom circuit occurring when the medical instrument contacts conductive fluid from a previous procedure that is not within one of the vessels. A phantom circuit is detected if the resistance of the resulting circuit exceeds a predetermined threshold. The computer visually and/or audibly indicates whether the correct vessel was pierced or excized by the medical instrument.