Catheter Cutter and Filter for Occlusion Removal
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Solution Overview
Problem
Current endovascular procedures for removing occlusive materials from body lumens often result in significant blood loss and risk of embolization due to the dispersal of debris, as existing devices struggle to effectively remove occlusive debris without causing further blockages.
Innovation Solution
An occlusion removal system comprising a catheter with a cutter assembly and filtration section, which uses a drive mechanism and conveyor to cut and filter occlusive material while minimizing blood loss by filtering debris from the bloodstream and returning blood, utilizing a biocompatible filter media that allows blood to pass while trapping occlusive aggregates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maceration devices are used to cut, shave, sand, or grind occlusive material, then occlusive debris is removed from the body lumen, but free-flowing occlusive debris is created within the body lumen that can cause distal embolization
Solution Approach 1:
A filter is introduced as an intermediary component within the catheter system that captures occlusive debris after maceration, preventing it from entering the bloodstream and causing distal embolization while allowing the maceration process to continue effectively
Solution Approach 2:
The maceration device and filter are combined into a single integrated catheter system, allowing simultaneous debris breakdown and capture without requiring separate procedures or devices
2Productivity
If trapping, filtering, or aspirating devices are used to remove occlusive debris from the bloodstream, then occlusive debris is removed from the body lumen, but significant blood loss occurs during the process
Solution Approach 1:
The filter is designed to extract only the occlusive debris from the bloodstream while allowing blood to pass through and be returned to the circulation, separating the harmful debris from the valuable blood components
Solution Approach 2:
The system discards only the occlusive debris that needs removal while recovering and returning the blood to the bloodstream, minimizing loss of valuable bodily fluids
3Productivity
If conventional removal techniques are used to clear occlusive materials, then blockages are removed and blood flow is restored, but embolization may recur if significant amounts of occlusive debris remain in the bloodstream
Solution Approach 1:
The filter acts as an intermediary that ensures complete debris capture before blood returns to circulation, providing reliable prevention of embolization recurrence while maintaining rapid blood flow restoration
Solution Approach 2:
The filter provides continuous capture of debris throughout the procedure, giving feedback on debris load and ensuring complete removal before concluding the procedure, thereby preventing recurrence
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
Facilitates the removal of occlusive debris from body lumens with minimal blood loss and reduced risk of embolization, enabling a continuous cutting and removal process that effectively prevents further blockages by filtering and containing occlusive material within the catheter system.
Implementation Method 1
utilizing a biocompatible filter media that allows blood to pass while trapping occlusive aggregates
Data Source
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AI summary
A catheter system for removal of occlusive material in a body lumen (50). The catheter system includes a catheter body (10), extending between a distal end (20) and a proximal end (22) and having a proximal portion (29) and a distal portion (28). The catheter body (10) includes a filtration section (30) having filter media (32) configured to permit blood to pass through the lumen of the catheter body (10) and inhibiting occlusive material from passing out of the catheter body (10). The catheter system also includes a control handle (120) coupled to the proximal portion (29) of the catheter body (10) and a cutter assembly (12) having a drive mechanism (40) operatively coupled to the control handle (120). The cutter assembly (12) includes a drive mechanism (40) and a conveyor (44) coupled to the drive mechanism (40) and rotatable with the drive mechanism (40) to convey occlusive material proximally within the catheter body (10) and through the filtration section (30).