Guide Wire Control Device with Pivoting Lever
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Solution Overview
Problem
Existing guide wire control devices are time-consuming to use, prone to kinking, and difficult to clean due to their design, which requires frequent tightening and loosening, and struggle with applying consistent force on long, thin guide wires covered in blood and fat.
Innovation Solution
A guide wire control device featuring a handle member with an elongate passage and a pivotally mounted lever, held by a spring means, allowing for adjustable clamping and release of the guide wire without bending, enabling quick and easy adjustment of clamping force and easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a Jacob's chuck or collet chuck is used to clamp the guide wire, then sufficient clamping force is generated through friction, but the device becomes time-consuming to operate due to repeated tightening and loosening
Solution Approach 1:
The lever is designed to pivot between locked and unlocked positions dynamically. The spring means provides continuous elastic force that automatically engages the locked position when the lever is released, eliminating the need for manual tightening and loosening operations while maintaining sufficient clamping force through the friction between the guide wire and the passage walls.
Solution Approach 2:
The spring means automatically returns the lever to the locked position after use, and the misalignment of the through-hole with the elongate passage automatically prevents re-engagement until deliberately unlocked. This self-service mechanism eliminates repeated manual operations for tightening and loosening, reducing time loss while maintaining clamping force.
2Force
If the guide wire is clamped at a large surface area, then sufficient friction is generated, but the guide wire slips easily when covered with blood and fat
Solution Approach 1:
The elongate passage provides a localized clamping surface with optimized geometry. The passage dimensions and surface characteristics are specifically designed to generate sufficient friction force on the guide wire while maintaining reliable grip even when the guide wire is contaminated with blood and fat, rather than relying on a large surface area that is more susceptible to contamination effects.
3Ease of operation
If the guide wire is gripped at its ends, then the guide wire can be advanced, but the guide wire becomes kinked due to its length and small diameter
Solution Approach 1:
Instead of gripping the guide wire only at its ends (one-dimensional contact), the elongate passage provides distributed contact along a segment of the guide wire (transitioning to two-dimensional engagement). This dimensional change in the gripping approach allows the guide wire to be advanced without kinking, as the distributed contact supports the guide wire's structure along its length rather than concentrating force at single points.
4Ease of operation
If the lever is held in the unlocked position, then the guide wire control device can be displaced relative to the guide wire, but the spring means must be continuously overcome to maintain this position
Solution Approach 1:
The lever is extracted from a continuously engaged state and instead operates in discrete states (locked/unlocked). The spring means is designed to automatically return the lever to the locked position, so the unlocked position is transient and only requires minimal energy to maintain during actual displacement operations, rather than requiring continuous energy input to hold the lever in an intermediate position.
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 device provides quick and easy adjustment of clamping force, prevents kinking, and allows for efficient advancement of guide wires with adjustable friction, facilitating their use in medical procedures while being easy to clean.
Implementation Method 1
the spring means is configured to hold the lever relative to the handle member such that the longitudinal axis of the through-hole in the lever is misaligned with the longitudinal axis of the elongate passage in the handle member for locking of the guide wire control device to a guide wire
Implementation Method 2
The guide wire control device is locked to a guide wire extending through said elongate passage and said through-hole, to permit pivotal movement of the lever relative to the handle member... for clamping of a guide wire extending through said elongate passage and said through-hole such that the guide wire can be advanced
Data Source
AI summary
A guide wire control device for advancing a guide wire into a body or a portion of the body, comprises a handle member (1), a lever (2) and a spring means (3). The spring means (3) holds the lever (2) relative to the handle member (1) such that the longitudinal axis of a through-hole (9) in the lever (2) is misaligned with the longitudinal axis of an elongate passage (4) in the handle member (1) for locking the guide wire control device to a guide wire (5) extending through said elongate passage and said through-hole. Pivotal movement of the lever (2) brings the longitudinal axis of the through-hole (9) into alignment or substantial alignment with the longitudinal axis of the elongate passage (4) for release of the guide wire (5). Pivotal movement of the lever (2) also brings the longitudinal axis of the through-hole (9) into renewed misalignment with the longitudinal axis of the elongate passage (4) for clamping of the guide wire (5).