Compact Bevel Non-Coring Needle Reducing Insertion Profile
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Solution Overview
Problem
Standard non-coring needles have a large insertion profile and bevel face size, which can lead to partial coring of access port septums and limit fluid flow and patient comfort during medical procedures.
Innovation Solution
A compact bevel face non-coring needle with a minimized bevel face length and offset distance, featuring a bent distal portion with a sharpened tip and chisel portion to prevent septum coring, allowing for a larger gauge size while maintaining a reduced insertion profile and enhanced fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a standard non-coring needle design is used, then the bevel face is large enough to access the port, but the insertion profile becomes large and causes patient discomfort
Solution Approach 1:
The patent changes the geometric parameters of the bevel face by introducing a lateral offset between the bevel face and the longitudinal axis of the needle. This offset creates a compact bevel face configuration that reduces the insertion profile while maintaining adequate bevel face area for port access, thereby improving patient comfort without sacrificing access capability
2Quantity of substance
If the bevel face size is increased to improve fluid flow, then fluid flow rate increases, but the insertion profile increases and causes patient discomfort
Solution Approach 1:
The patent utilizes parameter changes by optimizing the lateral offset distance and bevel face angle to achieve a compact configuration. This allows the bevel face to be positioned closer to the needle axis, reducing the insertion profile while maintaining sufficient bevel face area to support high fluid flow rates through larger gauge needles
3Quantity of substance
If a larger gauge needle is used to increase fluid flow rate, then fluid flow rate improves, but the needle becomes more difficult to insert and causes patient discomfort
Solution Approach 1:
The patent applies parameter changes by optimizing the lateral offset and bevel face geometry to reduce the overall insertion profile. This enables the use of larger gauge needles with higher fluid flow rates while maintaining a compact insertion profile that is easier to insert and causes less patient discomfort
4Area of stationary object
If the bevel face is positioned far from the needle axis, then the bevel face area is large for port access, but the offset distance increases and complicates the design
Solution Approach 1:
The patent utilizes parameter changes by establishing an optimized lateral offset distance that balances bevel face area requirements with design simplicity. The offset is positioned at a specific distance from the longitudinal axis that provides sufficient bevel face area for port access while maintaining a straightforward needle design that does not overly complicate manufacturing
Data Source
AI summary
A non-coring needle for use in accessing an implanted medical device is disclosed. The non-coring needle is configured to include a compact bevel face relative to standard non-coring needles. In one embodiment, the non-coring needle comprises a hollow cannula that defines a lumen and terminates at a sharpened distal tip. The cannula includes a proximal portion and a bent distal portion. The distal portion defines a bevel face extending proximally from the distal tip, and the bevel face includes the lumen distal opening. The bevel face defines an open angle of at least about one degree with respect to a longitudinal axis of the proximal portion of the cannula. The bevel face is also laterally offset from the proximal portion of the cannula by an offset distance of no more than about 0.010 inch. A portion of the bevel face is dulled to prevent access port septum coring.