Rotating Jet Thrombectomy Catheter for Clot Maceration
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Solution Overview
Problem
Existing thrombectomy devices face limitations such as blockages, slow operation, and lack of feedback during procedures, due to their design characteristics. These issues lead to increased procedural time and risk of catheter kinking, which can reduce performance or render the device inoperable.
Innovation Solution
A system incorporating a jet rotator within a thrombectomy catheter, where the jet rotator rotates due to pressurized fluid flow, effectively macerating thrombotic material by directing a pressurized fluid jet from the distal plenum into the aspiration lumen, enhancing clot breakdown and aspiration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary high-pressure saline jet is used to macerate thrombus, then the maceration effectiveness is improved, but the risk of catheter blockage increases due to incomplete maceration
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a stationary saline jet to a rotating jet configuration. The jet rotates at the distal tip of the catheter, dynamically impacting the thrombus from multiple angles and improving maceration effectiveness while reducing the risk of blockage through enhanced clearance of macerated material.
2Ease of operation
If simple aspiration catheters are used, then ease of use and rapid deployment are improved, but the devices become blocked when faced with older, more organized thrombotic material
Solution Approach 1:
The patent merges the simple aspiration catheter design with a rotating jet maceration mechanism. This combination allows the device to maintain ease of use and rapid deployment while adding the capability to effectively break up older, organized thrombus material, thereby preventing blockages and improving reliability.
3Productivity
If mechanical rotary devices with auger are used, then thrombus transport capability is improved, but the devices work slowly and offer no feedback on advancement
Solution Approach 1:
The patent replaces the mechanical auger system with a fluid-based rotating jet mechanism. This substitution eliminates the slow mechanical rotation and lack of feedback associated with auger devices, while maintaining effective thrombus transport through the dynamic fluid jet and venturi effect.
4Reliability
If manual flush type devices are used, then thrombus breakdown capability is improved, but performance varies based on physician pumping consistency
Solution Approach 1:
The patent implements self-service by using the patient's blood pressure to automatically drive the saline jet rotation and thrombus breakdown process. This eliminates dependence on physician pumping consistency, as the system self-regulates based on the patient's hemodynamic conditions, thereby improving both reliability and ease of operation.
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 rotating jet rotator system improves the efficiency of thrombus maceration and aspiration, reducing procedural time and minimizing the risk of catheter kinking or blockages, while providing better coverage and breakdown of thrombotic material.
Implementation Method 1
A pressurized fluid source is in fluid communication with the supply lumen to provide pressurized fluid to the supply lumen
Implementation Method 2
The jet rotator rotates when the pressurized fluid is allowed to flow through the supply lumen
Implementation Method 3
directing a pressurized fluid jet from the distal plenum into the aspiration lumen, enhancing clot breakdown
Implementation Method 4
macerating a thrombus located in the elongate lumen when the pressurized fluid contacts the thrombus
Implementation Method 5
a vacuum source in communication with the aspiration lumen to provide negative pressure to the aspiration lumen
Implementation Method 6
aspirating the macerated thrombus
Data Source
AI summary
Systems and methods including a jet rotator (e.g., a saline jet rotator) to aspirate a thrombus or thrombotic material. The jet rotator rotates when the pressurized fluid (e.g., saline) is allowed to flow through the supply lumen. The jet rotator includes a proximal plenum that is configured to allow injection of the pressurized fluid into the jet rotator when the pressurized fluid flows through the supply lumen. The jet rotator includes a distal plenum and one or more pressurized fluid channels. The channels allow the pressurized fluid to flow from the proximal plenum to the distal plenum. The jet rotator includes a jet orifice that is configured to allow the pressurized fluid to flow from the distal plenum into the aspiration lumen. Either the jet orifice, the channels, or other features of the jet rotator provide for rotation of the jet rotator relative to the aspiration lumen during use.