Radial-Strut Clot Treatment for Stent-Safe Removal
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Solution Overview
Problem
Current methods for removing adherent clot and intimal hyperplasia from intravascular stents are limited, as aspiration mechanisms are ineffective for chronic clot, mechanical devices risk damaging the stent, pharmacological treatments are risky, and surgical options are invasive.
Innovation Solution
A system comprising a clot treatment device with axially extending struts, deployable within a stent, that can be radially expanded and translated/rotated to mechanically dislodge clot material without catching on the stent, using elongate members to control the device's expansion and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical clot treatment devices are used to remove adherent clot material, then clot removal effectiveness is improved, but the risk of stent damage increases
Solution Approach 1:
The clot treatment device is divided into multiple independent struts that can be individually controlled. Each strut can be selectively engaged or disengaged from the stent, allowing the operator to navigate the device through the stent structure without causing damage while maintaining the ability to effectively engage and remove clot material when needed.
Solution Approach 2:
The device employs dynamic struts that can change their configuration between a delivery state (where they are constrained and cannot catch on stent edges) and a treatment state (where they can engage clot material). This dynamic adaptability allows the device to pass through the stent safely while still providing effective mechanical clot removal when deployed.
2Ease of operation
If aspiration mechanisms are used to remove clot material, then the procedure is less invasive, but the treatment is limited to non-adherent acute clot only
Solution Approach 1:
The clot treatment device is designed to treat multiple types of clot material (acute non-adherent clot, chronic adherent clot, and intimal hyperplasia) with a single mechanical device. By combining the ability to engage adherent material mechanically while maintaining a minimally invasive delivery approach, the device achieves versatility across different clot types without requiring multiple specialized tools.
3Stability of the object's composition
If the clot treatment device includes cross-members between struts, then structural stability is improved, but the device may catch on the stent during advancement
Solution Approach 1:
The struts are designed to be dynamically controllable, allowing them to be positioned in different configurations during advancement versus treatment. During advancement, the struts can be positioned to minimize profile and avoid catching on stent edges; during treatment, they can be positioned to maximize clot engagement capability while maintaining structural stability through controlled deployment rather than permanent cross-member connections.
Data Source
AI summary
Disclosed herein are devices for mechanically removing clot and/or other material from implants implanted in the vasculature of a patient, and associated systems and methods. In some embodiments, a system for removing clot material from an implant—such as a stent—includes a clot treatment device configured to be deployed within the stent, a handle, and a first elongate member and a second elongate member coupling the clot treatment device to the handle. The first elongate member couples a first end portion of the clot treatment device to the handle, and the second elongate member couples a second end portion of the clot treatment device to an actuator of the handle. Actuation of the actuator is configured to move the second elongate member relative to the first elongate member to move the first and second end portions toward one another to radially expand the clot treatment device.