Implant Delivery Torque Device Sheath Cutting
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Solution Overview
Problem
Implant delivery in the vasculature is challenging due to small blood vessel sizes, high turbidity from blood flow, and tortuous anatomy, leading to difficulties in accurately placing implants at treatment sites.
Innovation Solution
An implant delivery system that includes an implant, an implant wire, a sheath, and a torque device with a cutting element and clamping mechanism, allowing for precise placement and secure locking of the implant at the target site while retracting and cutting the sheath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the implant is pushed out from the catheter/delivery device, then the implant can be deployed at the target site, but the implant may shift considerably due to difficult vascular conditions
Solution Approach 1:
The patent applies preliminary action by pre-positioning the implant at the target site within the delivery catheter before deployment. The implant is strategically placed so that upon deployment it will be at or near the target site, and the delivery catheter is then retracted to leave the implant in place. This preliminary positioning approach addresses the contradiction by establishing precise placement before the deployment action occurs.
2Ease of operation
If the delivery device is retracted to expose the implant, then the implant can be deployed, but the implant may shift considerably during delivery
Solution Approach 1:
The patent applies preliminary action by pre-positioning the implant at the target site within the delivery catheter before deployment. The implant is strategically placed so that upon deployment it will be at or near the target site, and the delivery catheter is then retracted to leave the implant in place. This preliminary positioning approach addresses the contradiction by establishing precise placement before the deployment action occurs.
3Productivity
If a cutting element is used to cut the sheath, then the sheath can be separated from the implant wire, but the device complexity increases
Solution Approach 1:
The patent applies the extraction principle by removing the cutting element from the main delivery system and placing it within the torque device as a separate, integrated component. The cutting element is positioned to engage the sheath during retraction, allowing automatic separation without requiring additional manual steps. This extracts the cutting function from the overall deployment process while integrating it into the existing torque device structure.
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 system enables quick and accurate placement of implants, minimizing displacement and movement during delivery, thus improving the efficiency and precision of vascular implant deployment.
Implementation Method 1
The torque device includes a cutting element and accommodates a portion of the sheath and a clamping device for fixing the position of the implant wire. The sheath can be retracted through the torque device to cut the sheath and separate it from the implant wire.
Implementation Method 2
The torque device includes a cutting element and accommodates a portion of the sheath and a clamping device for fixing the position of the implant wire.
Implementation Method 3
In one embodiment, a separator tube is located adjacent to the cutting element within the torque device. The separator tube guides the sheath through a separate sheath lumen during the cutting operation.
Data Source
AI summary
An implant delivery system is described. The implant delivery system utilizes an implant, implant wire, delivery sheath, and a torque device. The torque device may Include a cutting element to slit the delivery sheath and a clamp device to fix the position of the implant delivery wire.