Prosthesis Delivery Sleeve Retraction Mechanism
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Solution Overview
Problem
Current medical device delivery systems for repairing damaged body vessels during emergency open surgery are time-consuming and require high skill, often leading to complications such as clot formation, muscle necrosis, and increased risk of vessel failure due to the need for sutures and temporary shunts, which can delay hemostasis and perfusion.
Innovation Solution
A delivery system featuring a sleeve that retains a prosthesis in a compressed configuration, allowing for rapid expansion and deployment within a body vessel using retraction members and an actuation mechanism, which can be easily manipulated by trauma physicians to minimize surgical time and reduce the risk of vessel damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surgical repair techniques (suturing, temporary shunts) are used to repair damaged body vessels, then hemostasis and vessel repair can be achieved, but the surgical time is excessive and requires high physician skill
Solution Approach 1:
The prosthesis is pre-compressed within a delivery sleeve to a small profile, allowing it to be delivered through a minimally invasive approach. The sleeve itself serves as a preliminary containment structure that maintains the prosthesis in a deployable state until reaching the target vessel, eliminating the need for complex pre-positioning maneuvers
Solution Approach 2:
The delivery sleeve acts as an intermediary device that facilitates prosthesis deployment. It provides a controlled environment for prosthesis expansion and serves as a temporary support structure during the transition from compressed to expanded state, simplifying the physician's task to merely retract the sleeve
2Strength
If sutures are used to affix the vessel to the fitting, then the connection is secured, but tissue compression increases the risk of necrosis and the procedure time increases
Solution Approach 1:
The invention extracts the suture step entirely from the deployment process. The prosthesis is designed with self-securing features that engage the vessel wall mechanically without requiring sutures, eliminating both the time consumption and tissue compression associated with suture placement
Solution Approach 2:
The prosthesis is designed to self-secure to the vessel wall through its structural design. The fitting portion of the prosthesis mechanically engages with the vessel wall upon expansion, creating a secure connection without external intervention such as suturing, thereby avoiding tissue compression and necrosis risk
3Speed
If temporary shunts are inserted to restore blood flow quickly, then hemostasis is achieved, but clot formation occurs requiring return to operating room
Solution Approach 1:
The definitive prosthesis is delivered and deployed in a single step during the initial trauma surgery, eliminating the temporary nature of shunts. The prosthesis is pre-prepared in a compressed state within the delivery system, allowing immediate deployment without requiring a second surgical intervention
Solution Approach 2:
The invention replaces the temporary shunt paradigm with a permanent prosthesis solution. The delivery sleeve is discarded after serving its purpose of containing and deploying the prosthesis, while the prosthesis itself remains as a permanent, clot-resistant solution that eliminates the need for future removal or replacement
4Productivity
If the prosthesis is delivered in a compressed configuration through a sleeve, then deployment speed is improved, but the sleeve must be efficiently removed to allow expansion
Solution Approach 1:
The delivery system is segmented into distinct functional components: the delivery sleeve, the prosthesis, and the retraction members. The retraction members are separate elements that can be independently manipulated to facilitate sleeve removal, allowing the physician to control the deployment sequence without adding complex integrated mechanisms
Solution Approach 2:
The retraction members serve as intermediary tools that facilitate the removal of the delivery sleeve. By providing grip points and mechanical leverage, the retraction members simplify the sleeve removal process from a complex maneuver to a simple pull action, maintaining high deployment speed while reducing operational complexity
Data Source
AI summary
A delivery system deploys a prosthesis for open surgical repair of a body vessel. The system includes a sleeve to retain segments of a prosthesis in a compressed configuration and retraction members. The sleeve has outer segments associated with each end of the prosthesis. Retraction of the retraction members removes the outer segments of the sleeve from the prosthesis outer ends to allow for expansion of the outer ends of the prosthesis in an outside-in direction. The system can include a handle and an actuation member movably attached to the handle. The actuation member is coupled to the sleeve outer segments so that movement of the actuation member corresponds to removal of the sleeve. The system can include elements to retain the sleeve outer segments to the actuation member and to redirect the retraction members to a direction different from the axis of the prosthesis.