Torque Cable Braiding Pattern for Rotational Control
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Solution Overview
Problem
Current technologies face challenges in effectively transferring torque in rotating apparatuses, particularly in macerating clots within the vasculature, where efficient rotation and expansion of an expandable basket are necessary to manage blockages without causing vessel damage or incomplete clot removal.
Innovation Solution
The design incorporates a torque cable system with a braiding pattern and axial strands within the expandable basket, allowing for controlled rotation and expansion, coupled with a handle that includes a rotational speed control mechanism and diameter control to manage the basket's size and operation, facilitating efficient maceration of clots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a torque cable system with braiding pattern and axial strands is used, then rotational control and expansion control are improved, but device complexity increases
Solution Approach 1:
The torque cable is segmented into multiple independent wires arranged in a braiding pattern, with additional axial strands. This segmentation allows each wire to contribute to torque transmission while maintaining flexibility, resolving the contradiction between rotational control and structural complexity by distributing the functional load across multiple simple elements rather than requiring a single complex mechanism
Solution Approach 2:
The torque cable employs a composite structure combining braided wires and axial strands, creating a multi-component system where each component serves a specific function. The braided portion provides torsional stiffness for rotational control, while axial strands enhance tensile strength and flexibility, achieving improved operational control through a composite design that manages complexity through functional specialization
2Productivity
If rotational speed control mechanism is added to the handle, then maceration effectiveness is improved, but device complexity increases
Solution Approach 1:
The handle incorporates a rotational speed control mechanism that allows dynamic adjustment of the basket's rotation speed during the maceration procedure. This dynamic control enables optimization of maceration effectiveness for different clot types and locations, resolving the contradiction by providing adaptability that improves productivity while accepting controlled complexity in the handle mechanism
Solution Approach 2:
The control mechanism enables variation of rotational speed as a key operational parameter, allowing the operator to adjust the rotation rate to match procedural requirements. This parameter control directly improves maceration efficiency by optimizing the mechanical action on clots, while the complexity is managed through a focused control system that adjusts only the critical rotational parameter
3Object-affected harmful factors
If diameter control is implemented, then vessel safety is improved, but device complexity increases
Solution Approach 1:
The diameter control mechanism allows localized adjustment of the basket's expansion diameter to match the specific vessel dimensions. This local adaptation ensures the basket exerts appropriate force on clots while avoiding excessive expansion that could damage the vessel wall, resolving the contradiction by providing precise dimensional control tailored to the specific anatomical location
Solution Approach 2:
The diameter control enables dynamic adjustment of the basket expansion during the procedure, allowing the operator to adapt the basket size to different vessel diameters and clot characteristics. This dynamic control reduces vessel damage risk by preventing over-expansion while maintaining effective clot contact, accepting controlled complexity in the control system as necessary for safety
Data Source
AI summary
A torque cable that comprises an inner layer and an outer layer. The inner layer includes a plurality of wires that form a braiding pattern. A first set of wires of the inner layer is directed in a proximal direction and a second set of wires of the inner layer is directed in a distal direction. The outer layer includes a plurality of wires that form a braiding pattern. A first set of wires of the outer layer is directed in a proximal direction and a second set of wires of the outer layer is directed in a distal direction.