Intrabody Surgery Catheter with Sensor-Adaptive Burr
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Solution Overview
Problem
Current methods for removing occluding materials from blood vessels are inefficient, particularly in tortuous regions, requiring multiple catheters and lacking effective debris management, which increases treatment time, cost, and risk, and poses risks of vessel perforation and debris accumulation in vital organs.
Innovation Solution
A catheter system with a rotatable burr/cutter and slidable sleeve, equipped with sensors and a vacuum aspiration system, that adapts to different occlusion types and minimizes debris entry into the bloodstream by continuous aspiration through the guidewire, reducing the need for multiple catheters and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple catheters are used to remove different types of occlusion, then different occlusion types can be treated, but treatment time increases and procedure complexity increases
Solution Approach 1:
The catheter system integrates multiple cutting mechanisms (rotational burr for hard calcified plaque, slicing blade for soft plaque, and atherectomy device for thrombus) within a single device, enabling treatment of all occlusion types without requiring multiple separate catheters. This multi-functional design directly resolves the contradiction by providing versatility across occlusion types while maintaining efficient single-procedure treatment.
Solution Approach 2:
The invention combines previously separate catheter-based atherectomy devices into a single integrated system that can sequentially or simultaneously deploy different cutting mechanisms. By merging multiple specialized catheters into one universal platform, the system eliminates the need for repeated catheter exchanges, thereby reducing treatment time while maintaining the ability to address diverse occlusion types.
2Strength
If rotational burr is used to remove hard calcified plaque, then hard occlusion can be effectively treated, but risk of vessel perforation increases
Solution Approach 1:
The rotational burr's rotational speed is dynamically controlled and adjusted during the procedure based on real-time feedback from force sensors that monitor contact forces between the burr and plaque. This dynamic control allows the system to maintain effective plaque removal while automatically reducing speed when excessive force is detected, thereby preventing vessel perforation.
Solution Approach 2:
Force sensors provide real-time feedback on the interaction between the cutting element and the vessel wall/plaque. This feedback loop enables closed-loop control of the rotational burr's operation, allowing the system to detect approaching vessel walls and adjust or stop rotation accordingly, thus preventing perforation while maintaining effective plaque removal capability.
3Reliability
If multiple catheters are used for different occlusion types, then complete occlusion removal can be achieved, but device complexity increases
Solution Approach 1:
The system employs a single catheter platform capable of deploying multiple specialized cutting mechanisms (rotational burr, slicing blade, atherectomy device) to handle different occlusion types. This universal design achieves complete occlusion removal across all types while reducing device complexity by eliminating the need for multiple separate catheters and their associated delivery systems.
Solution Approach 2:
The single catheter system is segmented into modular functional components that can be selectively deployed based on the detected occlusion type. Each cutting mechanism operates as an independent module within the unified catheter structure, allowing the system to maintain reliability for complete removal while managing complexity through modular architecture rather than multiple complete catheter systems.
4Productivity
If occlusion debris is not continuously removed, then cutting effectiveness is maintained, but debris accumulation in bloodstream increases
Solution Approach 1:
The vacuum aspiration system operates continuously throughout the atherectomy procedure, maintaining constant negative pressure to remove debris as it is generated. This continuous action ensures that debris is promptly evacuated from the bloodstream, preventing accumulation and embolization while allowing the cutting process to proceed effectively without interruption or debris-related complications.
Solution Approach 2:
The vacuum aspiration system acts as an intermediary between the cutting zone and the bloodstream, intercepting and removing debris particles before they can enter circulation. This mediator function protects the patient from debris-related complications while maintaining cutting effectiveness, as the aspiration system handles debris management without interfering with the primary cutting 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
Enables efficient removal of various occlusion types in a single procedure, minimizing vessel perforation risk and debris accumulation, while effectively managing debris through continuous aspiration, thus reducing treatment time and improving patient safety.
Implementation Method 1
a vacuum pump in operable communication with the catheter to create a low-pressure zone
Implementation Method 2
evacuate the ablated bodily material produced during the surgery through the catheter
Data Source
AI summary
A method for conducting intrabody surgery by means of a surgical device having a cutting arrangement actuated by a driveshaft and rotationally supported by the guide wire. A receiving cannel extends through the cutting arrangement and movably receives the guidewire. A plurality of sensors is provided within the cutting arrangement to emit signals capable of changing parameters depending on the composition of the occlusion, so as to allow the control unit to generate signals controlling operation of the cutting arrangement. The method includes the steps of detecting parameters within the intrabody area by the sensors to controlling operation of the cutting arrangement with the power and control unit.