Catheter Fluid Jet Arterial Dissection Tool
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Solution Overview
Problem
Current surgical methods for arterial dissection reconstruction involve invasive open surgery, causing stress on the heart, downstream organ dysfunction, and injury to healthy tissues, and existing catheter-mounted tools are not effective in efficiently cutting through the dissection septum without damaging surrounding tissues.
Innovation Solution
A catheter-mounted surgical device with a fluid jet prong and deflector anvil that delivers a high-pressure fluid jet laterally to cut through the dissection septum while minimizing damage to the true lumen, using a pair of guide wires to position the device and a catheter for fluid delivery, allowing for precise cutting and repair of arterial dissections without open surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open surgical exposure and clamping is 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 the mechanical clamping system with a fluid jet cutting system. Instead of using mechanical clamps to close the artery during repair, the invention uses a high-pressure fluid jet delivered through a catheter to cut the dissection septum while maintaining blood flow, thereby eliminating heart stress and organ dysfunction associated with clamping.
Solution Approach 2:
The patent introduces a catheter-mounted fluid jet device as an intermediary tool that can access the arterial dissection through the vessel lumen without requiring external surgical exposure. This intermediary approach allows internal repair while avoiding the harmful effects of open surgery on surrounding organs.
2Reliability
If open surgery is performed to access and repair arterial dissection, then the dissection can be repaired, but healthy tissues such as nerves and lungs are injured from surgical exposures
Solution Approach 1:
The patent extracts the surgical intervention from the external open approach and moves it inside the arterial lumen. By delivering the cutting tool through a catheter inserted into the artery, the repair procedure is performed internally without exposing surrounding healthy tissues to surgical trauma.
Solution Approach 2:
The patent replaces the mechanical surgical exposure system with a fluid-based catheter delivery system. Instead of making external incisions and exposing the artery mechanically, the invention uses a flexible catheter to deliver the fluid jet cutting tool through the bloodstream to the dissection site.
3Ease of operation
If a fluid jet is used to cut the dissection septum, then cutting can be performed without open surgery, but the fluid jet may damage the true lumen if not properly controlled
Solution Approach 1:
The patent applies local quality by directing the fluid jet precisely at the dissection septum while protecting the true lumen. The catheter design includes features that localize the cutting action to only the intended target area, ensuring that the high-energy fluid jet affects only the pathological tissue and not the healthy arterial wall.
Solution Approach 2:
The patent uses the dissection septum itself as an intermediary target that stops the fluid jet before it can reach the true lumen. The cutting tool is designed to cut through the septum, which acts as a barrier that absorbs the fluid jet energy, preventing damage to the underlying true lumen.
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
Enables minimally invasive repair of arterial dissections by precisely cutting the dissection septum with reduced risk of damage to the artery walls, minimizing the need for prosthetic grafts and reducing surgical stress on the heart and organs, thus improving patient outcomes.
Implementation Method 1
A fluid jet prong extends from the distal end of the body and has a fluid passage within that leads to an outlet pointing laterally relative to the body axis for delivering a fluid jet
Implementation Method 2
A deflector anvil extends from the lateral distal end of the body directly opposite the jet outlet for contact and dispersal of the fluid jet
Data Source
AI summary
A catheter mounted arterial surgical tool has a body with a fluid jet prong extending from a distal end of the body along a prong axis that is parallel to and laterally offset from a body axis. A fluid passage extends through the fluid jet prong to an outlet that points laterally relative to the prong axis. A deflector anvil extends from the distal end of the body along a deflector axis that is parallel to and offset from the body axis. The deflector anvil has a face that faces toward the fluid jet prong and is impinged by a fluid jet discharged from the outlet. A pair of guide wire holes extend from the proximal to the distal end of the body parallel to the body axis for receiving guide wires to enable the body to slide along the guide wires.