Intrauterine System Inserter with Automatic String Locking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inserters for intrauterine devices and systems face challenges in correctly positioning and securely inserting IUSs due to the need for manual handling of removal strings, which can lead to incorrect positioning and potential damage during the insertion process, especially for devices with larger diameters and complex frames.
Innovation Solution
A novel inserter design featuring a handle with a longitudinal opening, a movable slider, and an insertion tube that includes locking means controlled by the slider or insertion tube, allowing for single-handed operation and automatic locking and release of the removal strings, ensuring the IUS remains immobile during insertion and is correctly positioned in the uterus without manual string handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual handling of removal strings is used during insertion, then the device can be inserted, but incorrect positioning and potential damage occur
Solution Approach 1:
The removal string is designed to automatically engage with the insertion tube and plunger mechanism without requiring manual handling. The string self-positions through the cervical canal and is automatically secured by the insertion tube's locking feature, eliminating the need for practitioner manipulation and ensuring consistent positioning.
Solution Approach 2:
The insertion tube serves as an intermediary mechanism that mediates between the practitioner's insertion action and the removal string. The tube's internal structure guides and secures the string automatically, translating the insertion motion into proper string positioning without requiring direct manual handling of the string itself.
2Adaptability or versatility
If the insertion tube diameter is increased to accommodate larger IUS devices, then larger devices can be inserted, but correct positioning becomes more difficult
Solution Approach 1:
The insertion tube incorporates a locking feature that provides feedback when the removal string is correctly positioned. The string's engagement with the tube's internal structure creates a mechanical interlock that confirms proper positioning, allowing the practitioner to verify accuracy without manual string manipulation.
Solution Approach 2:
The insertion system is segmented into distinct functional zones: the insertion tube with its locking feature, the removal string with engagement elements, and the IUS device. This segmentation allows each component to perform its specific function independently, with the tube's locking zone ensuring proper string positioning regardless of the overall tube diameter.
3Productivity
If forceful pulling is applied to insert the device, then insertion can be achieved, but the device ends enter too deep into the insertion tube
Solution Approach 1:
The removal string is pre-configured to engage with the insertion tube's locking feature before the IUS device is fully inserted. This preliminary engagement creates a mechanical stop that prevents the device from being pulled too deep, allowing forceful insertion without compromising positioning accuracy.
Solution Approach 2:
The locking feature in the insertion tube creates a preliminary counter-action force that opposes excessive pulling. When the removal string engages with the locking mechanism, it automatically generates a restraining force that prevents the device ends from entering too deep, counterbalancing any forceful insertion motion.
Data Source
AI summary
An inserter for an intrauterine system can include a handle having an opening, a slider arranged in the opening, a plunger attached to the handle, an insertion tube attached to the slider and arranged around the plunger, and a lock adapted to reversibly lock at least one removal string of the intrauterine system. The lock can include a main part with an opening, the main part being rotatably mounted on a shaft or axle, an extension of the main part, and a counterpart. The removal string passes through the opening of the main part and is immobilized between the main part and the counterpart when the lock is in a locking position. The slider is configured to press against the extension of the main part and turn the main part around the shaft or axle to release the removal string as the slider is moved backwards.