Integrated Thrombectomy Catheter With Balloon and Embolic Filter
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Solution Overview
Problem
Current treatments for post thrombotic syndrome require multiple devices during a single procedure, increasing costs, procedure time, and patient risk due to multiple insertions and prolonged time.
Innovation Solution
A single medical apparatus with a sheath and integrated thrombectomy device, including elongate cannulas with perforations, a mechanical thrombectomy whisk, an expandable embolic filter, and an inflatable balloon, allowing for mechanical thrombectomy, lytic delivery, and embolic protection in a single device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices are used during a single procedure, then comprehensive treatment functions (mechanical thrombectomy, lytic delivery, embolic protection) are achieved, but procedure time increases and patient risk increases
Solution Approach 1:
The patent combines multiple separate treatment devices into a single integrated apparatus. The sheath contains multiple elongate cannulas (first, second, third, and fourth cannulas) that can be simultaneously deployed to perform mechanical thrombectomy, lytic delivery, and embolic protection functions. This merging eliminates the need to remove and insert multiple separate devices, directly reducing procedure time while maintaining comprehensive treatment capabilities.
Solution Approach 2:
The single medical apparatus is designed with multi-functional capabilities through its modular cannula system. Each cannula serves specific functions: the first cannula for mechanical thrombectomy, the second for lytic delivery, the third for embolic protection, and the fourth for additional support functions. This universal design allows one device to replace multiple specialized devices, reducing both procedure time and the complexity of device management.
2Adaptability or versatility
If multiple devices are used during a single procedure, then comprehensive treatment functions are achieved, but additional costs are incurred
Solution Approach 1:
The patent merges multiple separate treatment devices into a single integrated apparatus containing four functional cannulas. This consolidation reduces the quantity of devices from multiple separate instruments to one unified device, directly addressing the cost issue while preserving all necessary treatment functions.
Solution Approach 2:
The apparatus employs a nested structure where multiple elongate cannulas are disposed within a single sheath. The first, second, third, and fourth cannulas are sequentially nested within each other or within the sheath lumen, allowing compact storage and single-insertion deployment. This nesting principle enables multiple functions to be delivered through a single device insertion, reducing both the number of devices needed and the associated costs.
3Adaptability or versatility
If multiple devices are used during a single procedure, then comprehensive treatment functions are achieved, but patient risk increases due to multiple insertions
Solution Approach 1:
By combining multiple treatment functions into a single apparatus, the patent reduces the number of separate insertions required. The sheath with its nested cannulas can be inserted once and then deployed to perform all necessary functions (mechanical thrombectomy, lytic delivery, embolic protection), thereby reducing patient exposure to multiple insertion risks while maintaining comprehensive treatment capabilities.
4Loss of time
If a single device is used, then procedure time is reduced and costs are lowered, but device complexity increases
Solution Approach 1:
The patent manages device complexity through segmentation of functions into distinct modular cannulas within the sheath. Each cannula (first, second, third, fourth) is designed with a specific function, allowing independent operation and deployment. This segmentation approach organizes the complex multi-functional device into manageable modules, making the complexity systematic rather than chaotic, and facilitating easier deployment and control despite the overall device complexity.
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 apparatus reduces procedure time and costs while minimizing patient risk by integrating multiple functions into a single device, effectively treating thrombus with reduced device insertions.
Implementation Method 1
inflating the inflatable balloon through the inflation passageway; confirming via angiography that a blood flow in the venous lumen has stopped at the treatment site
Implementation Method 2
an expandable embolic filter connected to the third exterior surface... deflating the inflatable balloon, whereby the step of deflating restores blood flow and pushes the debris into the expandable embolic filter
Implementation Method 3
expanding the mechanical thrombectomy whisk to the venous lumen diameter; rotating the second elongate cannula having the mechanical thrombectomy whisk, whereby the step of delivering the lytic solution and the step of rotating break up the thrombus into debris
Implementation Method 4
delivering a lytic solution through the first elongate cannula; the step of delivering the lytic solution... break up the thrombus into debris
Data Source
AI summary
A medical apparatus has a thrombectomy device disposed in a sheath lumen of a sheath that is movable between an initial extended position and a retracted position. The thrombectomy device includes a first elongate cannula having a distal tip, a guidewire lumen, and a perforated region, which is proximal to the distal tip and is in fluid communication with the guidewire lumen. A second elongate cannula, which is configured to rotate, has a second lumen and a mechanical thrombectomy whisk, which is proximal to the distal tip. A third elongate cannula has a third exterior surface, a third lumen, an inflation passageway, an inflatable balloon connected to the third exterior surface, and an expandable embolic filter connected to the third exterior surface at a location distal to the inflatable balloon. The first elongate cannula is disposed in the second lumen. The second elongate cannula is disposed in the third lumen.