Guiding Sheath Pressure Relief Channels for Smooth Device Insertion
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Solution Overview
Problem
Existing introducer and guiding sheath catheters experience suction effects due to complex medical devices obstructing the inner lumen, making it difficult to move devices within the sheath.
Innovation Solution
The introducer sheath features an interior lumen with pressure relief channels and a pull wire lumen, embedded within the tubular body, to alleviate pressure buildup and suction during device insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a concentric round through-lumen with tapered distal tip is used for easy insertion, then insertion ease is improved, but suction effect increases making device movement difficult
Solution Approach 1:
The interior lumen is segmented by adding at least one transverse channel that divides the single continuous lumen into multiple pathways. This segmentation allows fluid to bypass the medical device, reducing the suction effect generated by the device obstructing the lumen during movement.
Solution Approach 2:
The transverse channel acts as an intermediary pathway that allows fluid to flow around the medical device. This intermediary channel provides an alternative route for fluid movement, preventing the direct suction effect that would otherwise occur when the device blocks the main lumen.
2Adaptability or versatility
If the complete inner diameter of the sheath is used to deliver complex medical devices, then device delivery capability is improved, but suction effect increases making device movement difficult
Solution Approach 1:
The lumen is segmented by incorporating transverse channels that create multiple fluid pathways. This allows the sheath to maintain its full inner diameter for delivering complex devices while the segmented channels provide bypass routes that reduce suction effects during device movement.
Solution Approach 2:
The transverse channels add a dimensional component to fluid flow by creating lateral bypass paths perpendicular to the main lumen axis. This dimensional change allows fluid to flow around the device in a different direction, reducing the suction effect while preserving the full inner diameter for device delivery.
3Device complexity
If a single continuous lumen is used for device passage, then structural simplicity is improved, but pressure buildup occurs during device insertion
Solution Approach 1:
The single continuous lumen is segmented by adding transverse channels that create multiple independent pathways. This segmentation relieves pressure buildup during device insertion by allowing fluid to distribute across multiple channels rather than being constrained to a single pathway.
Solution Approach 2:
The harmful pressure buildup is extracted from the system by providing alternative fluid pathways through the transverse channels. These channels extract excess pressure by allowing fluid to bypass areas of high pressure, thereby relieving the stress during device insertion.
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 effectively relieves pressure and suction effects, facilitating smooth movement of medical devices through the sheath by providing a bypass for fluid release and reducing obstruction.
Implementation Method 1
An inner surface of the interior lumen includes at least one channel therein configured to provide pressure relief for movement of a medical devise passing through the interior lumen
Data Source
AI summary
A medical device including an elongated tubular body having opposed proximal and distal end portions and defining a longitudinal axis, the elongated tubular body including an interior lumen extending therethrough, wherein an inner surface of the interior lumen includes at least one longitudinal depression formed therein, configured to provide pressure relief to accommodate movement of a medical device passing through the interior lumen.