Barbed Suture IUD Anchoring for Postpartum Expulsion
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Solution Overview
Problem
Current intrauterine device (IUD) insertion methods during the postpartum period face high expulsion rates and uterine perforation risks due to difficulties in securing the IUD in the upper fundal region, particularly due to uterine contractile forces and geometry changes, leading to inadequate placement and increased unintended pregnancies.
Innovation Solution
A system comprising a barbed suture and needle, along with a suction device, is used to securely insert and anchor the IUD in the uterine cavity, with the barbed suture configured to remain in place and optionally biodegradable for timed release, ensuring stable placement and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If IUD insertion is performed during the postpartum period, then accessibility to patients is improved and contraceptive coverage is enhanced, but expulsion rates increase significantly (9-30% compared to 3% for interval insertions)
Solution Approach 1:
The barbed suture is pre-attached to the IUD device before insertion, allowing the anchoring mechanism to be prepared in advance. This preliminary configuration enables the suture to immediately engage with the uterine wall upon deployment, securing the IUD before uterine contractions can displace it during the critical postpartum period
Solution Approach 2:
The barbed suture acts as an intermediary element between the IUD and the uterine wall. It provides a mechanical connection that transfers and distributes forces, allowing the IUD to remain securely positioned despite uterine involution and contractile forces that would otherwise cause expulsion
2Duration of action of moving object
If IUD insertion is performed during the postpartum period, then birth interval improvement is achieved, but uterine perforation risk increases due to larger uterine size and lactation effects
Solution Approach 1:
The barbed suture serves as a mediator that distributes mechanical stresses between the IUD and the uterine wall. By spreading the load across a larger surface area of the uterine wall, the suture reduces point stresses that could lead to perforation, especially in the enlarged postpartum uterus
Solution Approach 2:
The suture is deployed to create preliminary anchoring points in the uterine wall before the IUD is fully positioned. This preliminary action establishes secure attachment points that guide proper IUD placement and reduce the risk of perforation during the insertion process
3Manufacturing precision
If clinician experience and insertion technique are improved, then IUD placement precision is enhanced, but the complexity of the insertion procedure increases due to difficulty of deployment in the upper fundal region
Solution Approach 1:
The barbed suture is pre-attached to the IUD, and the insertion device is pre-configured with the suture system. This preliminary preparation eliminates the need for complex manual suture attachment techniques during the procedure, reducing clinician skill requirements while maintaining precise placement
Solution Approach 2:
The barbed suture acts as an intermediary that simplifies the anchoring process. The barbed design provides self-retaining characteristics that reduce the complexity of securing the IUD, allowing less experienced clinicians to achieve reliable placement without requiring advanced manual dexterity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly reduces IUD expulsion rates and perforation risks by providing a secure anchoring mechanism, improving placement success and long-term contraceptive efficacy, especially during the postpartum period when uterine changes are most pronounced.
Implementation Method 1
a suction device configured to create a vacuum on a target region of the uterine cavity wall
Data Source
AI summary
System and methods for inserting and securing an intrauterine device.