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 significant recovery time, and often result in surgical complications due to the need for manual extraction or fragmentation followed by passage of fragments.
Innovation Solution
A suction evacuation assembly comprising a sheath with side arms, a negative pressure system, and an endoscope for visualization, allowing for the direct removal of stones or foreign bodies through suction or fragmentation into the assembly for collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual extraction techniques (stone basket, stone forceps) are used to remove stones, then stones can be removed from the body, but operative time increases and surgical complications increase
Solution Approach 1:
The patent employs a suction device that utilizes negative pressure (vacuum) to actively pull stone fragments through the sheath, replacing manual extraction methods. The suction device creates a pressure gradient that draws fragmented stones through the lumen, eliminating the need for time-consuming manual manipulation with baskets or forceps while reducing surgical complications associated with those techniques
2Ease of operation
If pressure irrigation and stone basket are used to remove stones, then stones can be extracted, but operative time increases
Solution Approach 1:
The invention integrates a suction device with negative pressure capability that actively draws stone fragments through the sheath lumen. This hydraulic/pneumatic approach replaces the manual stone basket technique, maintaining ease of operation while significantly reducing the time required for stone extraction by eliminating the need for manual manipulation and multiple positioning adjustments
3Device complexity
If stone fragments are passed by patient on their own after lithotripsy, then no additional extraction equipment is needed, but patient suffering increases and recovery time increases
Solution Approach 1:
The suction device with negative pressure capability actively removes stone fragments through the sheath and into a collection bottle, preventing the need for patients to pass fragments spontaneously. This active suction mechanism reduces patient suffering by immediately evacuating fragments rather than allowing them to remain in the body requiring natural passage, thereby reducing recovery time while maintaining relatively simple device complexity
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 and surgical complications by enabling efficient removal of stones or foreign bodies with minimal invasion, allowing for quicker patient recovery and reducing the need for manual extraction techniques.
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
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.