Percutaneous Suture Delivery Device with Spring-Loaded Needle Actuation
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Solution Overview
Problem
Conventional methods for closing vascular access openings after minimally invasive procedures are time-consuming and can cause patient discomfort, with risks of unintended total occlusion, ischemia, or thrombosis, and require accurate needle placement for effective suturing.
Innovation Solution
A suture delivery device with a needle deployment member that transitions between uncompressed and compressed configurations to position needles at a piercing angle, using deflectable wings and a mechanism for reproducible actuation, along with a sheath and catcher to ensure precise needle placement and capture, facilitating percutaneous suturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual compression is used to achieve hemostasis, then hemostasis can be achieved, but the procedure takes significant time and causes patient discomfort
Solution Approach 1:
The patent replaces the manual compression mechanical system with an automated suture delivery device that uses a spring-loaded mechanism to automatically advance needles and deliver sutures through the vessel wall, transforming a time-consuming manual process into an automated mechanical system that achieves hemostasis more quickly
Solution Approach 2:
The suture delivery device is designed to automatically advance the needle and deliver the suture without requiring continuous manual manipulation by the operator. The spring-loaded mechanism self-actuates upon trigger activation, and the device guides the suture material through the tissue automatically, reducing the need for ongoing operator intervention and minimizing procedure time
2Reliability
If manual compression is used to achieve hemostasis, then hemostasis can be achieved, but patient discomfort is considerable
Solution Approach 1:
The patent replaces the painful manual compression mechanical system with a controlled suture delivery mechanism that creates precise, localized tissue approximation. The spring-loaded needle advancement and suture deployment system replaces the sustained pressure and potential tissue damage of manual compression with a more precise and less uncomfortable surgical intervention
3Reliability
If conventional suture delivering devices are used, then suturing can be performed, but accurate needle positioning requires significant operator skill
Solution Approach 1:
The patent replaces the skill-dependent manual needle positioning system with an automated spring-loaded mechanism that mechanically advances the needle along a predetermined path. The device's internal mechanics automatically control needle trajectory and depth, substituting operator skill with engineered mechanical precision and making the procedure more accessible to operators with varying levels of expertise
Solution Approach 2:
The patent introduces a spring-loaded mechanism as an intermediary between the operator's trigger activation and the needle advancement. This intermediary component automatically translates the trigger pull into controlled needle movement, eliminating the need for the operator to manually manipulate the needle and providing consistent, reproducible needle positioning regardless of operator skill level
4Reliability
If conventional suture delivering devices are used, then suturing can be performed, but reproducible deployment is difficult to achieve
Solution Approach 1:
The patent replaces variable manual deployment with a standardized spring-loaded mechanical system that provides consistent force and trajectory for needle advancement. The engineered spring mechanism ensures uniform energy delivery and needle placement across multiple procedures and operators, achieving reproducible deployment through mechanical standardization rather than operator technique
Solution Approach 2:
The patent incorporates a pre-loaded spring mechanism that is prepared in advance with the exact force and tension required for optimal needle advancement. This preliminary action ensures that when the trigger is activated, the needle receives a consistent, pre-determined force that produces reproducible deployment results, eliminating variability introduced by manual force application
Data Source
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AI summary
A suture delivery device for percutaneously suturing tissue includes an elongated deployment member having a guide member coaxially disposed over a shaft member may be used to carry a needle deployment member. The needle deployment member may be carried at a distal end of the elongated deployment member and include a plurality of needles releasably secured to the needle deployment member, wherein each needle is routed coaxially within the distal end of the needle deployment member. The needle deployment member may further include a needle pusher driven by a link coaxially disposed within the shaft member, wherein the needle pusher is configured to advance each needle through the distal end of the needle deployment member and coaxially over the proximal end of the needle deployment member to position the plurality of needles at a piercing angle in a proximal direction.