IV catheter with retractable needle and laterally offset biasing element and needle retraction cavity
AssigneeRetractable Technologies, Inc.
InventorsThomas J. Shaw, Mark Small, Ni Zhu
Life of this patent
Estimating the term…
Abstract
An intravenous catheter introducer for medical use having a body, a frontal attachment that is disposed in transverse sliding engagement with a front part of the body, a hub tube assembly that is releasably supported by the frontal attachment, and a retractable catheter insertion needle and needle holder that are biased rearwardly by a spring offset laterally from the needle axis, whereby lateral repositioning of the body relative to the frontal attachment following vascular insertion moves a needle retraction cavity disposed inside the body into substantial coaxial alignment and causes the needle holder to be retracted into the needle retraction cavity.
Claims10
An intravenous catheter introducer for medical use comprising:
- a body;
- a frontal attachment disposed in transverse sliding engagement with a front part of the body;
- a hub tube assembly releasably supported by the frontal attachment, the hub tube assembly further comprising a hub, a cannula support and a flexible cannula tube projecting forwardly from the hub;
- a rearwardly biased needle holder assembly seated in the frontal attachment, the needle holder assembly comprising a base, a tubular needle holder projecting forwardly from the base along a first longitudinal axis coaxially aligned with an insertion needle projecting forwardly from the tubular needle holder through the hub tube assembly, and a spring support post projecting forwardly from the base along a second longitudinal axis passing through a compressed coil spring disposed around and slidably engaging the spring support post forwardly of the base but not surrounding the tubular needle holder with no part of the insertion needle projecting through any part of the compressed coiled spring;
- and
- wherein the body further comprises a needle retraction cavity that is offset laterally from the first longitudinal axis the insertion needle prior to needle retraction.
Dependencies are inferred from the claim text.