Imaging Sensor Positioning for Cannula Insertion Without Tissue Deformation
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Solution Overview
Problem
Existing automated cannula insertion systems face challenges in properly positioning contact sensors, such as ultrasound transducers, on the skin to determine suitable locations for cannula insertion, often leading to tissue deformation and inaccurate imaging due to improper contact force and alignment.
Innovation Solution
A cannula insertion system that includes a contact sensor positioning system with sensors to determine position and contact force parameters, using image processing to adapt the contact sensor's position and force based on blood vessel deformation, ensuring optimal contact without excessive pressure, and employing a control device to align the sensor accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the contact sensor is pressed against the skin to obtain measurement signals, then the measurement quality improves, but tissue deformation occurs and imaging accuracy deteriorates
Solution Approach 1:
The system uses sensors to detect tissue deformation in real-time and feeds this information back to the positioning device, which automatically adjusts the contact sensor's position and applied force to maintain optimal measurement conditions without excessive pressure
Solution Approach 2:
The contact sensor positioning system dynamically adjusts the contact force and position based on real-time feedback from deformation sensors, transitioning from a static fixed-pressure approach to a dynamic adaptive approach that maintains measurement quality while preventing tissue damage
2Device complexity
If the contact sensor positioning is manually adjusted, then the system complexity is reduced, but the positioning precision and alignment accuracy deteriorate
Solution Approach 1:
The contact sensor positioning system performs self-alignment and self-positioning using automated sensors and control algorithms, eliminating the need for manual adjustment while achieving high positioning precision through the positioning device's automated control capabilities
3Stability of the object's composition
If the contact sensor is firmly positioned on the skin, then the contact stability improves, but the adaptability to different body surfaces deteriorates
Solution Approach 1:
The positioning device dynamically adapts its positioning strategy based on the detected body surface characteristics, adjusting the contact force and sensor orientation in real-time to maintain stable contact across different body surfaces including curved and irregular geometries
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 precise and efficient cannula insertion by maintaining optimal contact force and alignment, reducing tissue deformation and improving imaging quality, thereby facilitating successful cannula placement into blood vessels without human intervention.
Implementation Method 1
an ultrasound transducer is provided to obtain image data that can be used to localize a blood vessel
Implementation Method 2
The processing device is configured to process the position and/or contact force related parameter and to provide on the basis of the position and/or contact force related parameter a position control signal
Data Source
AI summary
A cannula insertion system includes: a contact sensor positioning system arranged to determine a suitable location for insertion of the cannula, where the contact sensor positioning system includes: a contact sensor having a contact surface to be placed at least partially on the human or animal body to enable measurement with the contact sensor, a positioning device configured to support and position the contact sensor, and a control device arranged to control the positioning device to position the contact sensor in a desired position. The contact sensor positioning system includes one or more sensors to determine a position and/or contact force related parameter representative for a position and/or contact force of the contact sensor, and a processing device to process the position and/or contact force related parameter and to provide a position control signal to the control device, where the contact sensor is an imaging sensor.