IV Line End Effector Geometry for Secure Sealing and Locking
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Solution Overview
Problem
Existing instrument delivery devices face issues with maintaining a proper seal and secure connection at the end effector, particularly when used with indwelling IV catheters, and there are challenges related to manufacturability and geometries of these devices.
Innovation Solution
The development of a medical device with an introducer and end effector that includes a proboscis with varying outer diameter and locking elements to securely couple to an intravenous line, featuring a system with a catheter adapter and locking elements to secure the end effector to a connector, enhancing sealing pressure and reducing damage to the septum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the end effector uses a traditional geometry design, then the sealing and connection performance may be adequate, but the manufacturability and moldability are poor
Solution Approach 1:
The patent applies parameter changes by transitioning from a traditional constant-diameter cylindrical geometry to a variable-diameter geometry where the outer diameter changes along the longitudinal axis. This includes a proximal portion with a first outer diameter, a distal portion with a second outer diameter, and a transition region connecting them. This geometric parameter variation improves manufacturability through standard molding techniques while achieving the desired functional performance for sealing and connection.
2Ease of manufacture
If the end effector uses a simplified geometry, then the manufacturability improves, but the ability to maintain a proper seal and secure connection deteriorates
Solution Approach 1:
The patent applies local quality by creating different geometric zones along the proboscis length, each optimized for specific functions. The proximal portion with larger diameter provides structural support and connection interface, the distal portion with smaller diameter enables proper sealing engagement with the needle-free connector, and the transition region facilitates smooth material flow during molding. This localized differentiation maintains sealing reliability while improving overall manufacturability.
3Ease of manufacture
If the end effector uses a constant outer diameter design, then the manufacturing process is simpler, but the connection security and seal maintenance are compromised
Solution Approach 1:
The patent applies dynamics by introducing a dynamic geometric profile that varies along the length of the proboscis rather than maintaining a static constant diameter. The variable diameter design allows the structure to adapt to different functional requirements at different locations: a larger proximal diameter for structural integrity and connection strength, and a smaller distal diameter for precise sealing engagement, while remaining manufacturable through standard variable-section molding processes.
Data Source
AI summary
Provided herein is a medical device including an instrument having a proximal end and a distal end, an introducer configured to moveably receive the instrument and having a housing having a proximal end, a distal end, and a sidewall therebetween defining an inner volume, and an end effector arranged at the distal end of the housing, the end effector configured to couple the introducer to an intravenous line and having a proboscis having a proximal end, a distal end, and a sidewall therebetween having a longitudinal axis and defining an interior that is configured to be in fluid communication with the inner volume of the introducer and the intravenous line, and at least one locking element configured to secure the end effector to the intravenous line.