Flat Magnetic Position Sensor for Catheter Space and Rotation Detection
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Solution Overview
Problem
Existing medical positioning systems face challenges in efficiently utilizing limited space within medical devices like catheters and introducers, as conventional cylindrical magnetic sensors are less sensitive and may not detect rotation, limiting their accuracy and sensitivity.
Innovation Solution
A flat magnetic position sensor with a magnetically permeable core and a coil wrapped around it, optimized for space efficiency, using Metglas material for enhanced sensitivity and detection of magnetic fields orthogonal to its flat surfaces, allowing for improved signal-to-noise ratio and detection of six degrees-of-freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cylindrical magnetic sensors are used, then the device structure is simple, but the sensitivity and detection accuracy are reduced
Solution Approach 1:
The patent transitions from a conventional cylindrical three-dimensional magnetic sensor to a flat two-dimensional magnetic sensor. This dimensional change allows the sensor to be embedded in the side wall of the elongate shaft while maintaining detection capabilities, thereby improving measurement precision without significantly increasing device complexity.
Solution Approach 2:
The patent changes the geometric parameters of the magnetic sensor from a cylindrical shape to a flat shape with specific dimensional ratios (width to height ratio between 2:1 and 20:1). This parameter change optimizes the sensor's sensitivity to magnetic fields while maintaining structural simplicity.
2Measurement precision
If conventional cylindrical magnetic sensors are used, then the manufacturing process is simple, but the sensitivity to magnetic fields is reduced
Solution Approach 1:
The patent employs a composite structure consisting of a magnetically permeable core material surrounded by a coil. This composite design enhances the sensor's sensitivity to magnetic fields by concentrating magnetic flux through the permeable core, while the modular nature of the composite structure facilitates manufacturing.
Solution Approach 2:
The flat two-dimensional geometry of the magnetic sensor allows for simplified manufacturing processes compared to three-dimensional cylindrical sensors. The flat structure can be more easily integrated into the side wall of the elongate shaft and requires less complex assembly steps.
3Volume of moving object
If space within medical devices is optimized, then the device profile is reduced, but the sensor detection capabilities are limited
Solution Approach 1:
The patent uses a flat two-dimensional magnetic sensor design that can be embedded within the side wall of the elongate shaft. This dimensional change allows the sensor to occupy minimal volume while maintaining effective detection capabilities, thus optimizing space utilization without compromising measurement precision.
Solution Approach 2:
The magnetic sensor is positioned locally within the side wall of the elongate shaft rather than requiring a large central space. This localized placement optimizes the overall device volume while maintaining detection functionality through the strategic positioning of the flat sensor structure.
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
The flat magnetic sensor enhances sensitivity and accuracy in detecting position and orientation, optimizing space utilization within medical devices and improving signal-to-noise ratio, enabling reliable tracking of medical devices with enhanced detection capabilities.
Implementation Method 1
a magnetically permeable core including a longitudinal axis and a first flat surface extending parallel with the longitudinal axis
Implementation Method 2
A coil including a conductive wire is wrapped around the longitudinal axis of the magnetically permeable core in a plurality of windings
Data Source
AI summary
A magnetic position sensor for tracking a position of a medical device. The magnetic position sensor includes a magnetically permeable core. The magnetically permeable core has a longitudinal axis and a first flat surface extending parallel with the longitudinal axis. A coil including a conductive wire is wrapped around the longitudinal axis of the magnetically permeable core in a plurality of windings.