noncoring

Noncoring refers to a class of needle design and technique used to access implanted venous access ports and other silicone septa without removing material from the septum. The term describes the device’s ability to puncture the self-sealing silicone septum without coring, meaning it does not cut out a plug of silicone or create a hole that compromises the septum’s integrity.

Design and mechanism: Noncoring needles, commonly called Huber needles in port access, feature a non-cutting, deflected tip and/or a side-bevel configuration. This design allows penetration of the septum with minimal disruption to the surrounding silicone, helping preserve septum integrity over repeated uses. The needle is typically connected to a sterile, single-use system and accessed under aseptic conditions.

Applications: The principal use of noncoring needles is to access implanted venous access ports for chemotherapy, long-term antibiotic therapy, parenteral nutrition, and other long-duration infusion therapies. They are chosen for procedures that require repeated access to a Port-A-Cath or similar device, with a focus on maintaining port longevity and reducing septum damage.

Advantages and limitations: Benefits include reduced risk of septum damage and leakage, longer port life, and more consistent seal after multiple accesses. Limitations include the need for specialized equipment and training, higher upfront costs, and the possibility of septum wear over time if access is frequent or improper technique is used. Proper technique and port maintenance protocols are essential to minimize complications such as infection or mechanical failure.

See also: implanted venous access device, huber needle, port-a-cath, needleless connector.