Coronary Stent Positioning Device with Mechanical Runner
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Solution Overview
Problem
Existing coronary stent positioning devices are limited in applicability, particularly for ostial lesions of the left and right coronary artery trunks, and require manual positioning, leading to increased radiation exposure for patients and medical personnel, as well as prolonged use of radio-opaque contrast agents.
Innovation Solution
A device with a housing and runner system that allows for mechanical positioning of a coronary stent within the coronary artery, featuring a collet or clamp mechanism for precise control and reduced exposure, enabling faster and more accurate stent placement across various coronary bed segments with reduced radiation and contrast agent use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual positioning of coronary stent is used, then the procedure can be performed with simpler devices, but the radiation exposure and contrast agent use increase due to prolonged positioning time
Solution Approach 1:
The patent replaces manual mechanical positioning with an automated mechanical system featuring a guiding catheter with a positioning mechanism that can automatically advance and retract the stent delivery system to the target location, thereby reducing the time the interventional team and patient are exposed to radiation and contrast agents
2Adaptability or versatility
If existing positioning devices are used for ostial lesions, then the device structure is simpler, but the applicability is limited to specific coronary artery segments
Solution Approach 1:
The patent designs a universal positioning system with a guiding catheter that can accommodate different stent types and deliver them to various coronary artery segments including ostial lesions, bifurcations, and complex geometries through a standardized interface and adjustable positioning mechanism
Solution Approach 2:
The patent incorporates a dynamic positioning mechanism that allows the guiding catheter to adapt its position and angle in real-time during the procedure, enabling delivery to different coronary segments while maintaining a relatively simple overall device structure
3Measurement precision
If manual stent positioning is performed, then the device operation is more flexible, but the positioning accuracy and speed decrease
Solution Approach 1:
The patent incorporates visual feedback mechanisms including radiopaque markers on the stent and delivery system that allow precise visualization of stent position relative to anatomical landmarks during fluoroscopy, enabling accurate positioning while maintaining operational flexibility through real-time visual guidance
Data Source
AI summary
A device for positioning a coronary stent within coronary arteries is described. The device has a housing having a cylindrical front part and an internally-threaded cylindrical rear part connected to each other by a slot allowing the cylindrical rear part to rotate around an axis. The cylindrical front part of the housing is provided with recesses for fixing a coronary guide. A runner is provided with projections for engaging an internal thread of the cylindrical rear part of the housing. The device includes a structure for clamping disposed in a threaded runner cap. The runner is disposed inside a retainer with ears projecting into side holes on both sides of the housing. Clamping is operable by rotation of the rear part of the device housing. A method for positioning a coronary stent within coronary arteries is also described.