Flared Needle Depth Control for Vaginal Wall Implant Fixation
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Solution Overview
Problem
There is a need for medical devices and methods that allow for effective and efficient implant placement, particularly in procedures where it is desirable to control the depth of penetration of an anchoring mechanism to secure implants within the body without penetrating through sensitive tissues like the vaginal wall.
Innovation Solution
The development of a medical device comprising an elongate member with a non-smooth outer surface featuring ridges and troughs, and an expander with a tapered section, which is used in conjunction with a manipulator to insert and secure an implant within the body, ensuring controlled penetration and secure attachment to the vaginal wall without excessive depth penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an anchor or device is used to couple the implant to the vaginal wall, then secure attachment is achieved, but the device may penetrate completely through the vaginal wall into the vagina
Solution Approach 1:
The anchor's penetration depth is controlled by changing the physical parameters of the delivery needle, specifically by forming a flared distal portion that acts as a depth stop. This geometric parameter change prevents the needle and attached anchor from penetrating too deeply into the vaginal wall while still allowing sufficient penetration for secure attachment.
Solution Approach 2:
The flared distal portion of the needle serves as an intermediary depth-control mechanism between the operator and the vaginal wall. This intermediate structure provides a physical barrier that limits penetration depth without requiring direct measurement or complex control systems during the procedure.
2Reliability
If the anchor penetrates deeper into the vaginal wall, then more secure fixation is achieved, but the risk of penetrating through the vaginal wall increases
Solution Approach 1:
The needle's flared distal portion creates a controlled penetration depth parameter that balances fixation reliability with safety. The flare geometry is designed to engage the vaginal wall at an optimal depth that provides sufficient anchoring strength while preventing complete penetration through the tissue.
Solution Approach 2:
The flared distal portion acts as a pre-designed depth-limiting feature that cushions against over-penetration before it can occur. This protective geometric feature is built into the needle beforehand to prevent the harmful effect of excessive penetration while maintaining reliable fixation.
Data Source
AI summary
A medical device includes an elongate member configured to be at least partially disposed within a body of a patient. The elongate member has an outer surface. The outer surface of the elongate member has a first ridge and a second ridge.