Sensor Guide Wire Divided Core Resolves Bending Artefacts
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Solution Overview
Problem
Current sensor guide wires for intravascular measurements require extra machining or wire forming for cantilevered mounting, making them time-consuming and costly to manufacture, and are prone to bending artefacts that can interfere with measurements.
Innovation Solution
A sensor guide wire design featuring a divided core wire with spatially separated parts, where the distal end of one part is attached to the jacket proximally and the proximal end of another part is attached distally to the sensor portion, eliminating the need for additional machining and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extra machining or wire forming is performed for cantilevered mounting of the sensor, then the resistance against bending artefacts is improved, but the manufacturing time and cost increase
Solution Approach 1:
The core wire is divided into two spatially separated parts: a first core wire part extending from the proximal end toward the sensor portion, and a second core wire part extending from the distal end toward the sensor portion. This segmentation eliminates the need for complex machining or wire forming at the sensor mounting site, as the divided core wire structure inherently provides the necessary support while simplifying manufacturing processes.
2Reliability
If extra machining or wire forming is performed for cantilevered mounting of the sensor, then the resistance against bending artefacts is improved, but the manufacturing cost increases
Solution Approach 1:
The core wire is divided into two spatially separated parts: a first core wire part extending from the proximal end toward the sensor portion, and a second core wire part extending from the distal end toward the sensor portion. This segmentation eliminates the need for complex machining or wire forming at the sensor mounting site, as the divided core wire structure inherently provides the necessary support while simplifying manufacturing processes.
3Strength
If the core wire is continuous through the sensor region, then the structural integrity is improved, but the susceptibility to bending artefacts increases
Solution Approach 1:
The core wire is divided into two spatially separated parts: a first core wire part extending from the proximal end toward the sensor portion, and a second core wire part extending from the distal end toward the sensor portion. This segmentation creates a gap or reduced structural support at the sensor mounting region, allowing the sensor to be mounted in a cantilevered fashion that resists bending artefacts while maintaining overall structural integrity through the distributed core wire support.
Solution Approach 2:
The divided core wire configuration provides localized structural support at the proximal and distal regions while creating a relatively softer support condition at the sensor mounting region. This local variation in structural quality allows the sensor to remain resistant to bending artefacts while the overall guide wire maintains sufficient structural integrity for navigation and stability.
Data Source
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AI summary
The present invention relates to a sensor guide wire (17) for intravascular measurements of physiological variables in a living body, having a proximal region (8), a distal sensor region (9) and a tip region (10). The sensor guide wire (17) further comprises a core wire member (11), a sensor element (14), which has a sensor portion (15), for measuring the physiological variable and to generate a sensor signal in response to said variable and a jacket (13), accommodating at least a part of said sensor element (14). The sensor portion (15), is sensitive to one or many of the physiological variables, pressure, temperature, and flow The core wire member (11) comprises two separate parts, a first core wire part (19) and a second core wire part (20), wherein a distal end (21) of said first core wire part (19) is attached to said jacket (13) proximally said sensor portion (15) and a proximal end (22) of said second core wire part (20) is attached to said jacket (13) distally to said sensor portion (15).