Vascular Puncture Device with Real-Time Imaging Feedback
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Solution Overview
Problem
Automated vascular puncture systems face challenges in accurately positioning the distal end of the outer tube within a blood vessel, leading to increased patient burden due to the lack of tactile feedback and visual guidance, resulting in potential misplacement and the need for repeated punctures.
Innovation Solution
A vascular puncture device and system that incorporate an imaging unit for acquiring cross-sectional images, a drive unit for precise movement of the inner needle and outer tube, and a control unit to calculate and adjust the puncture angle and movement distance based on image information, ensuring accurate placement of the outer tube within the blood vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated vascular puncture is performed without tactile feedback and visual guidance, then the puncture process can be automated, but the positioning accuracy of the outer tube distal end deteriorates
Solution Approach 1:
The system incorporates real-time imaging feedback during the puncture process. The imaging unit continuously captures images of the needle and outer tube positions, and the control unit processes these images to provide feedback on the current position of the outer tube distal end relative to the blood vessel, enabling automated adjustment to achieve accurate positioning.
Solution Approach 2:
The patent replaces the manual tactile feedback mechanism with an automated imaging and control system. The imaging unit (optical/acoustic system) substitutes for human visual and tactile senses, while the control unit (computational system) replaces human decision-making and manual adjustment operations.
2Device complexity
If the outer tube distal end is positioned too close to the blood vessel wall, then the puncture process is simplified, but the outer tube may come out of the blood vessel when the inner needle is removed
Solution Approach 1:
The control unit continuously monitors the position of the outer tube distal end relative to the blood vessel wall using imaging feedback. When the outer tube is positioned appropriately within the blood vessel, the system provides visual confirmation and can automatically adjust if movement is detected, ensuring reliable retention when the inner needle is removed.
3Productivity
If the distal end of the outer tube moves out of the blood vessel during automated puncture, then the puncture can be completed, but re-puncture is required increasing patient burden
Solution Approach 1:
The system provides real-time imaging feedback throughout the puncture process, allowing the control unit to monitor and maintain the outer tube distal end position within the blood vessel. This continuous monitoring and adjustment prevents tube displacement that would require re-puncture, thereby reducing patient burden while maintaining productivity.
Data Source
AI summary
A vascular puncture device is a vascular puncture device that punctures a blood vessel using an inner needle having a sharp needle tip, a flexible outer tube covering the inner needle, a drive unit moving the inner needle and the outer tube, and an imaging unit capable of acquiring a cross-sectional image of a human body in contact with a skin surface and visualizing a distal end of the inner needle, and includes a control unit controlling movement of the drive unit. The control unit calculates one or more of a movement distance and a puncture angle of the drive unit based on a separation distance between the distal end of the inner needle and a distal end of the outer tube, and moves the drive unit to set the drive unit at one or more of the calculated movement distance and the calculated puncture angle.