Medical device with sliding frontal attachment and retractable needle
Inventors
Shaw, Thomas J • Small, Mark • Zhu, Ni
Assignees
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Publication Number
US-9814841-B2
Publication Date
2017-11-14
Expiration Date
Abstract
A medical device having a frontal attachment and a connector housing having or attachable to an associated medical apparatus, the frontal attachment slidably engaging the connector housing and having a forwardly projecting, rearwardly biased needle and a needle retraction assembly, and the connector housing having a needle retraction cavity laterally offset from the needle in a first position, the needle retraction cavity being selectively movable relative to the frontal attachment following use to reposition the needle retraction cavity into alignment with the needle to permit retraction.
Core Innovation
The medical device comprises a connector housing with a fluid pathway and a laterally spaced needle retraction chamber, and a frontal attachment disposed in sliding engagement relative to the housing. The frontal attachment carries a forwardly projecting retractable needle and a needle retraction assembly with a rearwardly biased needle holder. A fluid seal is disposed between the frontal attachment and the connector housing.
A transverse sliding interface enables lateral movement of the frontal attachment relative to the connector housing between two operational positions. In the first position, the fluid pathway aligns coaxially with the needle retraction assembly for fluid delivery or withdrawal. In the second position, the needle retraction chamber aligns with the needle retraction assembly, allowing the needle to retract into the chamber while limiting fluid leakage.
Claims Coverage
The provided relevant claims identify one independent claim comprising four inventive features.
Connector housing with laterally spaced needle retraction chamber
The connector housing comprises a fluid pathway and a needle retraction chamber that is laterally spaced apart from the fluid pathway.
Sliding frontal attachment with biased needle retraction assembly
The frontal attachment is disposed in sliding engagement with the connector housing and comprises a forwardly projecting retractable needle and a needle retraction assembly with a rearwardly biased needle holder prior to use.
Transverse sliding interface with two alignment positions
Cooperatively configured elements form a sliding interface transverse to a longitudinal axis through the needle, allowing lateral movement between a first position where the fluid pathway coaxially aligns with the needle retraction assembly and a second position where the needle retraction chamber aligns with the assembly.
Fluid seal between frontal attachment and connector housing
A fluid seal is disposed between the frontal attachment and the connector housing to prevent leakage during repositioning.
The claim covers a sealed medical device configured to shift a needle retraction assembly via a transverse sliding interface from alignment with a fluid pathway to alignment with an offset needle retraction chamber.
Stated Advantages
Enables one-handed retraction directly from a patient.
Provides a substantially linear fluid path.
Reduces contamination and needle-stick risks.
Simplifies manufacture.
Documented Applications
Attachable or integrated syringe configurations.
Vascular catheter insertion devices.
Fluid infusion sets.
Fluid collection devices.
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