Sequential Unlocking Implant Delivery Trigger Mechanism
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Solution Overview
Problem
Conventional implant delivery systems for treating benign prostatic hyperplasia (BPH) often fail due to mistaken operation, where the cutting and pushing mechanism cuts the tether at the wrong time, leading to failed implantation and device faults, resulting in reduced reliability and safety.
Innovation Solution
An operating system with a housing and trigger mechanism that ensures the tether is cut only after the puncture needle is withdrawn, featuring a withdrawal lock, cutting lock, and cutting and pushing mechanism, which are sequentially unlocked to prevent incorrect operation and ensure safe and complete implant release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting and pushing mechanism is designed to cut the tether during the delivery process, then the implant can be released, but the tether may be cut at the wrong time leading to failed implantation
Solution Approach 1:
The patent applies preliminary action by designing a sequential unlocking mechanism where the withdrawal lock must be unlocked first to allow the cutting lock to be unlocked, which in turn allows the cutting and pushing mechanism to be activated. This predetermined sequence ensures the tether is cut only after the puncture needle is safely withdrawn, preventing premature cutting and failed implantation.
Solution Approach 2:
The patent segments the locking mechanism into distinct functional components: a withdrawal lock for controlling needle withdrawal, a cutting lock for controlling the cutting mechanism, and a pushing lock for controlling the pushing action. This segmentation allows each component to be independently controlled and unlocked in a specific sequence, ensuring reliable operation.
2Device complexity
If the delivery system uses a simple cutting mechanism, then the structure is easier, but mistaken operation can cause the tether to be cut at the wrong time
Solution Approach 1:
The patent divides the locking control into separate locks (withdrawal lock, cutting lock, pushing lock) that can be unlocked in a predetermined sequence. This segmentation adds complexity to the control mechanism but ensures operational safety by preventing mistaken operations that could cut the tether at the wrong time.
Solution Approach 2:
The mechanism requires preliminary unlocking of the withdrawal lock before the cutting lock can be unlocked, and the cutting lock must be unlocked before the cutting and pushing mechanism can operate. This preliminary action sequence ensures that the tether is cut only after the puncture needle is withdrawn, preventing operational errors.
3Speed
If the puncture needle is withdrawn quickly, then the procedure is faster, but the tether cutting may not be completed safely
Solution Approach 1:
The withdrawal lock must be unlocked first as a preliminary action before the cutting lock can be activated. This sequence ensures that the puncture needle is completely withdrawn and the field is clear before the cutting and pushing mechanism is activated, maintaining safety even during quick procedures.
Solution Approach 2:
The segmented locking mechanism allows the withdrawal lock to be unlocked independently, enabling quick needle withdrawal, while the cutting lock remains locked until the withdrawal is complete. This segmentation decouples the speeds of needle withdrawal and tether cutting, ensuring safety is not compromised.
Data Source
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AI summary
An operating system (3), an implant delivery system and an implant delivery method are disclosed. The implant delivery system includes an operating system (3) including a trigger (32). The trigger (32) employs an internally interlocked design in its initial configuration, which mandatorily requires the trigger (32) to take unlocking and triggering actions in a predetermined order in order to deliver the implant (1), thus avoiding failed delivery of the implant (1) due to a wrong triggering order. The operating system (3), the implant delivery system and the implant delivery method provide enhanced effectiveness and safety.