Self-Expanding Stent Imaging for Precise 3D Deployment Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing intravascular ultrasound (IVUS) imaging systems struggle to perform precise pre- and post-stent implantation comparisons due to the difficulty in repositioning the IVUS device accurately after stent implantation, making it challenging to assess whether the stent was properly implanted and its effectiveness.
Innovation Solution
A stent delivery system integrated with a shape sensing wire and intravascular ultrasound imaging, which generates three-dimensional composite images before and after stent implantation, allowing for precise comparison and ensuring proper stent placement by co-registering shape sensing data and ultrasound imaging data to calculate size characteristics and blood volume changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate IVUS device is used for imaging before stent implantation, then the imaging can be performed, but the device must be removed and re-inserted for post-implantation imaging, making precise comparison difficult
Solution Approach 1:
The patent combines the stent delivery device and the IVUS imaging device into a single integrated system. The imaging element is positioned within the stent delivery device, allowing the same device to perform both stent delivery and imaging functions before and after implantation, eliminating the need for separate device insertions and enabling precise before-and-after comparisons.
Solution Approach 2:
The stent delivery device is designed with multi-functionality, serving both as a delivery mechanism for the stent and as an imaging platform. The imaging element integrated into the delivery device allows it to perform diagnostic imaging before implantation and verification imaging after implantation, reducing procedural complexity.
2Measurement precision
If two-dimensional IVUS images are used for assessment, then the imaging can be performed, but precise comparison of vessel conditions before and after stent deployment is hindered
Solution Approach 1:
The patent transitions from two-dimensional IVUS imaging to three-dimensional imaging by integrating multiple imaging elements and combining their data. The system generates three-dimensional composite images that provide comprehensive spatial information about the vessel and stent, enabling accurate assessment of stent deployment and vessel conditions without information loss.
3Measurement precision
If the IVUS device is re-inserted after stent implantation for comparison, then post-implantation imaging can be obtained, but determining the exact location for comparison becomes difficult
Solution Approach 1:
The system performs preliminary imaging before stent implantation using the same integrated device that will be used for post-implantation imaging. The imaging element is positioned and configured in advance, and the device maintains its position throughout the procedure, making location comparison straightforward without requiring difficult repositioning operations.
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 precise three-dimensional imaging and comparison of blood vessel regions before and after stent implantation, ensuring effective stent placement and increased blood flow through the treated region.
Implementation Method 1
The transducers emit ultrasonic energy in order to create an image of the vessel of interest. Ultrasonic waves are partially reflected by discontinuities arising from tissue structures (such as the various layers of the vessel wall), red blood cells, and other features of interest. Echoes from the reflected waves are received by the transducer
Data Source
AI summary
In exemplary examples, methods and systems for treating vascular disease by implanting a stent within the vasculature and using intravascular imaging to determine and ensure that the stent was property implanted and producing a desirable and effective results is disclosed herein. For example, a system may obtain optical shape sensing data and intravascular imaging data for a blood vessel. The system may process the optical shape sensing data and the intravascular imaging data to generate a three-dimensional model and image of the blood vessel immediately before and immediately after stent implantation into the blood vessel, and perform a precise comparison of the before and after images to ensure that the stent was properly implanted and will produce or is producing a desirable and effective result. The precise comparison may be based on a derived diameter associated with the location at which the stent is placed in the blood vessel based on the generated pre and post generated three-dimensional models.