Suction Evacuation Device for Minimally Invasive Stone Removal
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Solution Overview
Problem
Existing surgical devices for removing kidney stones and gallstones are invasive, require lengthy recovery times, and often lead to surgical complications due to the need for manual extraction or fragmentation followed by patient passage of fragments.
Innovation Solution
A suction evacuation assembly comprising a sheath with side arms, a negative pressure system, and an endoscope for visual guidance, allowing for the direct removal of stones or foreign bodies through suction or fragmentation into a collection container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual extraction or fragmentation methods are used, then stone removal is achieved, but operative time increases and surgical complications increase
Solution Approach 1:
The patent applies the extraction principle by directly removing stones and fragments through the sheath using a suction device, eliminating the need for manual extraction techniques like baskets or forceps. The negative pressure system continuously sucks out debris, achieving rapid and complete stone removal without requiring additional manual intervention steps.
Solution Approach 2:
The patent utilizes pneumatic principles by employing a negative pressure suction system to remove stones and fragments. The vacuum-driven suction device creates negative pressure within the sheath, enabling automatic aspiration of debris without manual manipulation, thereby reducing operative time and minimizing surgical complications associated with manual extraction.
2Object-affected harmful factors
If less invasive stone retrieval devices are used, then patient suffering and recovery time decrease, but stone removal efficiency may be compromised
Solution Approach 1:
The patent applies universality by designing a multi-functional device that combines sheath, scope, and suction capabilities in a single integrated system. This allows the device to perform both diagnostic visualization and therapeutic stone removal through one access point, maintaining less invasive benefits while ensuring efficient stone removal through continuous negative pressure aspiration.
Solution Approach 2:
The suction device operates on self-service principles where the negative pressure system automatically aspirates stones and fragments without requiring additional manual extraction tools or techniques. The system self-regulates the removal process, maintaining efficient stone clearance while preserving the benefits of a less invasive single-access approach.
3Productivity
If pressure irrigation and stone basket are used, then stone fragments are removed, but operative time and surgical complications increase
Solution Approach 1:
The patent replaces the stone basket extraction method with a direct suction extraction system. The negative pressure device continuously removes fragments through the sheath lumen, eliminating the need to deploy and manipulate stone baskets, thereby reducing operative time and minimizing complications associated with basket-related procedures.
Solution Approach 2:
The patent substitutes pressure irrigation and mechanical basket retrieval with pneumatic suction. The negative pressure system creates a continuous flow that draws fragments through the sheath, providing faster and more reliable stone fragment removal without the surgical complications associated with manual basket manipulation and pressure irrigation techniques.
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
This method reduces operative time, minimizes surgical complications, and facilitates efficient stone or foreign body removal with reduced recovery time for patients.
Implementation Method 1
connecting another tube from the collection bottle to a negative pressure system; activating the negative pressure system in order to remove the stone from the cavity
Implementation Method 2
visualizing the stone or foreign body using a scope inserted through the sheath
Data Source
AI summary
A method for removing a stone from a patient comprising the steps of: providing a suction evacuation assembly which includes a sheath and one or more side arms; inserting and positioning a distal end of the sheath into a lumen or cavity of a patient's body containing a stones; connecting a tube to one of the side arms and to a collection bottle; connecting another tube to the collection bottle and a negative pressure system; visualizing the stone or foreign body using a scope inserted through the assembly; activating the negative pressure system in order to remove the stone from the cavity if the diameter of the stone is narrower than an inside diameter of the sheath and the side arm, or performing a lithotripsy on the stone to create fragments with a decreased diameter which allow the passage through the assembly; and collecting the stone in the collection bottle.