Intravascular Cutting Device Using High-Pressure Fluid Jet
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Solution Overview
Problem
Current surgical methods for arterial dissection, such as open surgical exposure and stent placement, often result in complications like restenosis, immune responses, and tissue damage, and are invasive, leading to significant patient discomfort and recovery time.
Innovation Solution
Development of an intravascular cutting device with a high-pressure fluid jet mechanism that uses a nozzle and deflector anvil to cut tissue and materials like calcified tissue and stents, allowing for minimally invasive procedures by selectively cutting through materials while preventing damage to healthy tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open surgical exposure and clamping are used to repair arterial dissection, then the dissection can be accessed and repaired, but extra stress is placed on the heart and downstream organ dysfunction occurs
Solution Approach 1:
The patent replaces mechanical clamping and open surgical exposure with a high-pressure fluid jet system that can cut and repair arterial dissections from within the vessel lumen, eliminating the need for external clamps and surgical exposure that cause heart stress and organ dysfunction
Solution Approach 2:
The patent introduces a fluid jet as an intermediary medium to perform cutting and repair functions inside the artery, allowing treatment of dissections without direct mechanical contact from external clamps or surgical instruments that would stress the heart and downstream organs
2Reliability
If healthy tissue is cut to repair arterial dissection, then the dissection can be accessed, but nerve and lung injuries occur from surgical exposure
Solution Approach 1:
The patent substitutes mechanical surgical cutting and exposure with a controlled high-pressure fluid jet that can precisely cut through the septum of arterial dissection from within the vessel, avoiding the need for external surgical exposure that would injure surrounding nerves and lungs
Solution Approach 2:
The patent applies cutting force locally at the dissection site through the fluid jet, allowing precise cutting of the septum without the widespread tissue exposure and injury that occurs with open surgical approaches
3Productivity
If stents are placed to hold open arteries, then blood flow is restored, but restenosis occurs due to immune system response
Solution Approach 1:
The patent extracts or removes the need for permanent foreign body implants like stents by using a fluid jet system that can cut and repair the arterial wall directly, eliminating the immune system response that leads to restenosis while still restoring blood flow
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 device enables precise cutting within the circulatory system, reducing recovery times, patient discomfort, and treatment costs by minimizing tissue damage and avoiding invasive surgical approaches, effectively treating conditions like arterial dissections and stent placement complications.
Implementation Method 1
intravascular cutting devices that use high-pressure water, saline, or other fluids to cut tissue and other materials including but not limited to calcified tissue, stents, stent grafts
Implementation Method 2
a working end that has a nozzle with a hole to allow the release of a high-pressure fluid jet. Opposite of the nozzle is a catch plate or deflector anvil that prevents the fluid jet from cutting healthy tissue
Data Source
AI summary
An intravascular cutting device described herein uses high-pressure water, saline, or other fluid to cut tissue and other materials including but not limited to calcified tissue, stents, stent grafts, and other devices. In some embodiments, the cutting device includes a working end that has a nozzle with a hole to allow the release of a high-pressure fluid jet. Opposite of the nozzle is a catch plate or deflector anvil that prevents the fluid jet from cutting healthy tissue. The device user will place the item to be cut between the nozzle and catch plate and then advance the device along the item to be cut as the fluid jet is activated, thus cutting the object as it advances.