Reverse Retropulsion Lithotripsy Device for Tissue Extraction
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Solution Overview
Problem
During lithotripsy procedures, the application of energy to break tissue often results in retropulsion, making it difficult to further break and remove the tissue, as the tissue is pushed away from the device, complicating the extraction process.
Innovation Solution
The implementation of a reverse retropulsion method using a lithotripter and a reflector or irrigation system to direct energy or fluid towards the tissue, guiding it back towards the suction device, thereby reducing retropulsion and facilitating faster tissue destruction and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If energy is applied to break tissue during lithotripsy, then tissue fragmentation is achieved, but tissue retropulsion occurs making further breaking and removal difficult
Solution Approach 1:
The patent applies preliminary anti-action by using a reflector to counteract the retropulsion force generated during lithotripsy. The reflector is positioned to reflect energy back toward the tissue, creating an opposing force that prevents the tissue from being pushed away during fragmentation, thereby maintaining tissue in the treatment zone for easier removal
Solution Approach 2:
The patent employs inversion by reversing the direction of energy delivery. Instead of delivering energy only in the forward direction, the system uses a reflector to deliver energy in the reverse direction (backward toward the tissue), creating reverse retropulsion that counteracts the forward retropulsion and facilitates tissue removal
2Device complexity
If traditional lithotripsy is used without reverse retropulsion, then device complexity is low, but procedure time is extended due to difficult tissue extraction
Solution Approach 1:
The patent applies multi-functionality by making the lithotripsy system perform both tissue fragmentation and tissue propulsion functions. The reflector not only reflects energy for fragmentation but also generates reverse retropulsion to propel tissue toward the collection passage, combining multiple functions into a single device component to reduce overall procedure time without significantly increasing 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 approach effectively reduces tissue retropulsion, allowing for more efficient fragmentation and extraction of tissue pieces, thereby shortening the procedure time and improving the overall lithotripsy process.
Implementation Method 1
an energy directing device positionable near the lithotripter and the collection passage, the energy directing device configured to propel the tissue toward the collection passage
Implementation Method 2
a lithotripter configured to deliver energy to tissue located at a tissue forming region
Data Source
AI summary
A reverse retropulsion device can include a lithotripter, a collection passage, and an energy directing device. The lithotripter can be configured to deliver energy to tissue located at a tissue forming region. The collection passage can be positionable at or near the body lumen. The energy directing device can be positionable near the lithotripter and the collection passage. The energy directing device can be configured to propel the tissue toward the collection passage.