Sheath Assembly with Integrated Suction for Endoscopic Surgery
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Solution Overview
Problem
Current endoscopic surgery techniques face challenges with large keyhole sizes, leading to increased bleeding, damage to surrounding organs, prolonged recovery, and complications during percutaneous renal surgery due to the need for larger sheath sizes to accommodate suction cannulas, which compromises fluid and pressure dynamics.
Innovation Solution
A sheath assembly with a tubular sheath and controllable suction unit that allows selective suction, enabling smaller keyhole sizes while maintaining effective fluid and fragment removal, using a mechanism with a reservoir and sealing assembly to manage suction pressure and prevent fluid spillage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a larger sheath size is used to accommodate suction cannula, then suction capability is improved, but keyhole size increases leading to more bleeding and damage to surrounding organs
Solution Approach 1:
The patent merges the sheath and suction cannula into a single integrated structure. The sheath itself incorporates suction channels and openings, eliminating the need for a separate suction cannula. This allows suction functionality to be achieved without increasing the overall sheath diameter, thereby maintaining minimal trauma to surrounding tissues while providing effective suction capability.
Solution Approach 2:
The sheath is designed to perform multiple functions simultaneously: it serves as both the access channel for the endoscope and the suction device. The sheath includes both visualizing openings for endoscopic observation and suction openings for fluid and fragment removal. This multi-functionality eliminates the need for additional separate devices that would increase keyhole size.
2Object-affected harmful factors
If a smaller keyhole size is used to reduce trauma, then bleeding and damage to surrounding organs are reduced, but suction capability is lost compromising fluid and pressure dynamics
Solution Approach 1:
The sheath merges visualization and suction functions into a single minimal-access device. By incorporating suction channels within the sheath structure itself, the design maintains a small keyhole size while preserving both endoscopic visualization capability and effective suction functionality for fluid and fragment removal.
Solution Approach 2:
The sheath features different types of openings at different locations: visualizing openings positioned for optimal endoscopic observation and suction openings positioned for effective fluid and fragment removal. This localized functional differentiation allows each opening type to perform its specific function efficiently within the constraints of a small sheath diameter.
3Object-generated harmful factors
If a larger endoscope diameter is used to accommodate suction cannula, then suction capability is improved, but sheath size must increase leading to larger opening in the body
Solution Approach 1:
The patent eliminates the need for a separate suction cannula by integrating suction functionality directly into the sheath structure. The sheath includes internal suction channels and external suction openings, allowing suction to be performed through the sheath itself without requiring a larger endoscope or separate suction device, thereby maintaining a minimal body opening.
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 enables minimally invasive endoscopic surgery with reduced trauma to the patient and surgeon, facilitating faster recovery and complete stone clearance with reduced bleeding and fluid leakage, while allowing for precise stone removal and controlled intra-renal pressure.
Implementation Method 1
a suction unit with controllable suction provision operatively connected to said outer other open end of said tubular sheath enabling selective suction effect inside the tubular sheath in said body region requiring surgery
Data Source
AI summary
A sheath assembly for different fields of endoscopic surgery involving suction, irrigation and material removal comprising a tubular sheath including a sheath cannula having an inner open end for introducing into body region requiring surgery and a suction unit with controllable suction provision operatively connected to the outer other open end of the tubular sheath comprising a reservoir. The reservoir includes a reservoir inlet connected in line with the outer other open end of the tubular sheath, a reservoir outlet connected to a suction machine and perpendicularly disposed with respect to the reservoir inlet, a releasably attachable sealing assembly to allow passage of operating endoscope through the reservoir and make assembly of the reservoir and the operating endoscope water and air tight for functioning of the suction unit; and a suction control opening disposed in operative cooperation with said reservoir outlet to provide alternative suction zone in the sheath assembly.