Rotatable Guide Wire Connector for Stable Pressure Signal Contact
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Solution Overview
Problem
Existing guide wires face challenges in maintaining accurate blood pressure measurements due to issues with electrical connections being momentarily cut and the complexity of connecting conductive wires within the small internal space, which affects the gain and reliability of the sensor.
Innovation Solution
A guide wire connector design with a holding portion, support portion, and guide portion that allows for rotatable connection of the guide wire, along with a configuration of terminal portions and electrode pins to ensure stable electrical connections, and a method for manufacturing the guide wire that facilitates easy assembly of conductive wires and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the guide wire is rotated to facilitate navigation into branch vessels, then the ease of operation is improved, but the electrical connection between the contact and terminal may be momentarily cut, worsening the reliability
Solution Approach 1:
The connector is designed to rotate together with the guide wire during navigation operations. The holding portion holds the guide wire while allowing it to rotate, and the guide portion rotates with the guide wire to maintain proper alignment between the contact and terminal throughout the rotation, preventing momentary disconnection
Solution Approach 2:
The holding portion acts as an intermediary component that secures the guide wire while accommodating its rotation. The guide portion serves as another intermediary that ensures the contact maintains proper engagement with the terminal during rotational movements, mediating between the rotating guide wire and the stationary terminal
2Volume of moving object
If the internal space of the guide wire is made small to reduce the guide wire size, then the ease of insertion into blood vessels is improved, but the complexity of connecting conductive wires and electrodes increases, worsening the ease of manufacture
Solution Approach 1:
The conductive wires are inserted through the internal space of the guide wire before the connector is assembled. The connector is then attached to the proximal end of the guide wire, with the conductive wires already in place, allowing for easier connection of electrodes without requiring manipulation within the constrained internal space during final assembly
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 solution enhances the gain of the sensor by stabilizing electrical connections and simplifying the assembly process, reducing the likelihood of signal disruptions and improving the accuracy and reliability of blood pressure measurements.
Implementation Method 1
The above-described sensor chip is provided with a diaphragm containing a wafer and a piezoelectric resistance element provided in the diaphragm. To the diaphragm of the guide wire inserted into a blood vessel, blood pressure is applied. When the diaphragm is deflected by the blood pressure, the electrical resistance value of the piezoelectric resistance element varies.
Implementation Method 2
The holding portion is provided with a body having an insertion hole for the guide wire and a holding piece extending along an axis line of the insertion hole from the body and capable of being elastically deformed inward in a radial direction with respect to the axis line. The holding portion is slid along the axis line of the insertion hole with respect to the guide portion, whereby the holding piece abuts on the guide surface to be elastically deformed inward in the radial direction.
Data Source
AI summary
A connector is provided with a holding component, a support component, a terminal electrically connected to a contact of a guide wire held by the holding component, and a guide component rotatable around an axial line of the guide wire with respect to the support component. The holding component is provided with a body having an insertion hole for the guide wire and a holding piece extending along an axial line of the insertion hole from the body and capable of being elastically deformed inward in a radial direction with respect to the axial line. The guide component has a guide surface guiding the holding piece inward in the radial direction. The holding component is slid along the axis line of the insertion hole with respect to the guide component, whereby the holding piece abuts on the guide surface to be elastically deformed inward in the radial direction.