Convertible Introducer Sheath Hub for Larger Instrument Access
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Solution Overview
Problem
Existing vascular access introducer sheaths do not allow for the direct placement of larger intravascular instruments without exchanging the sheath during a medical procedure.
Innovation Solution
A vascular introducer sheath device with a releasable proximal hub that allows for the attachment of a header hub, enabling the direct access of larger intravascular instruments through a twist-on or snap-on mechanism, and includes multiple passages for accommodating different-sized instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed hub structure is used in existing introducer sheaths, then the device structure is simple and reliable, but the device cannot accommodate larger intravascular instruments without exchange
Solution Approach 1:
The hub is divided into two separable parts: a first hub that remains on the introducer sheath and a second hub that can be detached. This segmentation allows the second hub to be removed when a larger instrument needs to be inserted, providing versatility while keeping the base structure simple.
Solution Approach 2:
The hub transitions from a static fixed structure to a dynamic configurable structure. The releasable connection mechanism allows the hub to change its state between attached and detached configurations, enabling adaptation to different instrument sizes during procedures.
2Productivity
If the introducer sheath is exchanged to accommodate larger instruments, then the instrument can be properly positioned, but the procedure time increases
Solution Approach 1:
The first hub is pre-configured with a releasable connection mechanism that allows quick detachment of the second hub. This preliminary setup enables rapid configuration changes without requiring complete sheath exchange, reducing procedure time while maintaining proper instrument positioning.
3Adaptability or versatility
If a releasable hub mechanism is added, then larger instruments can be accessed directly, but the device complexity increases
Solution Approach 1:
The complex releasable connection mechanism is extracted and concentrated into a localized interface between the first and second hubs. This allows the majority of the introducer sheath structure to remain simple while providing the necessary adaptability through a focused mechanical interface.
Data Source
AI summary
A vascular introducer sheath device comprising a tubular main shaft and main hub attached to the proximal end of the main shaft. Attached to the proximal end of the main hub is a header hub having a first arm and second arm. The header hub is attached to the main hub in a releasably locked configuration and functionally detachable from the main hub. The header hub and main hub could together have a twist-on or snap-on mating mechanism. An example of such a mating mechanism is a male lock fitting on the header hub and a female lock fitting on the main hub. There could be a side port on the main hub and a side port on the header hub, wherein the side ports for the main hub and header hub are oriented on a same plane when the header hub and the main hub are in locked configuration.