Deflectable Tip Access Sheath With Multiple Lumens
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Solution Overview
Problem
Current access sheaths used in endoscopic and laparoscopic surgery are limited in their ability to accommodate multiple instruments simultaneously, leading to inefficiencies and increased maintenance costs due to the need for frequent overhauls of expensive flexible endoscopes.
Innovation Solution
A deflectable tip access sheath with multiple lumens and a reinforced coil structure, allowing for the integration of optical systems, irrigation, and multiple instruments, while enabling the sheath tip to be bent and maneuvered for improved access and reduced trauma to tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single access sheath is used to accommodate multiple instruments, then the number of access points is reduced, but the complexity of the sheath structure increases
Solution Approach 1:
The sheath is divided into multiple functional lumens (first lumen for instruments, second lumen for optical system, third lumen for irrigation/suction) rather than a single channel, allowing multiple instruments to pass simultaneously through separate pathways within the same sheath structure
Solution Approach 2:
Multiple lumens are nested within the sheath wall structure, with each lumen serving a specific function. The lumens are arranged concentrically or adjacently within the sheath body, enabling multi-functionality without requiring multiple separate sheaths
2Ease of operation
If the distal portion of the sheath is made flexible to reduce tissue trauma, then the sheath can be maneuvered more easily, but the structural stability decreases
Solution Approach 1:
The sheath is divided into distinct segments with different flexibility characteristics: the distal portion is made flexible for maneuverability, while the proximal portion maintains rigidity for structural stability. This segmentation allows each portion to perform its optimal function
Solution Approach 2:
Different portions of the sheath have different mechanical properties - the distal portion is constructed to be flexible and compliant for navigating body passages, while the proximal portion is made more rigid to maintain structural integrity and positioning stability
3Adaptability or versatility
If multiple lumens are added to the sheath to accommodate additional instruments, then the versatility increases, but the manufacturing complexity increases
Solution Approach 1:
Multiple lumens are integrated into a single sheath structure rather than requiring separate devices. The lumens are formed simultaneously or assembled as an integrated unit, reducing the need for multiple separate components and simplifying the overall manufacturing process
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
Enhances the versatility and efficiency of minimally invasive procedures by allowing multiple instruments to be used through a single access point, reducing the need for frequent endoscope overhauls and minimizing tissue trauma.
Implementation Method 1
at least one coil embedded within the access sheath, the coil reinforcing at least a portion of a lumen
Implementation Method 2
at least one deflector filament operatively coupled to the distal portion and extending to the proximal portion... adapted for bending the distal portion of the access sheath at an angle
Data Source
AI summary
A disposable access sheath having a deflectable tip is provided. The access sheath is very flexible and allows a physician or other medical professional to provide diagnostic or therapeutic services to a remote body cavity. The access sheath has a deflectable tip that is able to bend at least 90° or 180° or more. This flexibility allows the physician or medical professional to make a very tight turn to visualize or treat the body cavity being treated. The access sheath may include a visualization system, a working channel, an irrigation channel, or other desirable features. The access sheath may include an interface at the proximal end of the working channel for insertion of an instrument for diagnosis or treatment of a human or mammalian patient.