System and method for safety syringe
Inventors
Shluzas, Alan E. • Diaz, Stephen H. • Shanley, John F. • Tillack, Jeff • Thayer, Dan • Steese-Bradley, Gary
Assignees
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Publication Number
US-12144970-B2
Publication Date
2024-11-19
Expiration Date
Abstract
One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber.
Core Innovation
A retractable safety injection system for injecting medicine into a patient is described. The system includes a syringe body with an interior medicine chamber and a conventional off-the-shelf compliant stopper member that contains medicine within the interior medicine chamber. A plunger member is manually manipulated to insert the stopper member relative to the syringe body.
The needle has proximal and distal ends, where the proximal end includes an anchoring geometry. The anchoring geometry is configured to at least partially penetrate the stopper member such that inserting the stopper member to the distal end of the interior medicine chamber causes the needle to be pulled proximally through the stopper member to be at least partially contained within the interior medicine chamber. A needle retention feature selectively couples the needle proximal end and an energy storage member so that the needle is pulled proximally when the stopper is inserted.
Safety behavior is further associated with energy storage modes in the plunger member, including a first stored mode and a second released mode. A latching member has a latched mode and an unlatched mode corresponding to the energy storage member modes, and triggering from latched to unlatched results in an audible cue that signifies the needle has been retracted. An unlatching member is configured such that movement of the needle proximal end causes the energy storage member to move from the first mode to the second mode.
Claims Coverage
The document includes two independent claims. Across the independent claims, the inventive features center on retracting an anchored needle into a syringe medicine chamber by inserting a conventional compliant stopper, coordinated with an energy-storage plunger having stored and released modes, and optionally providing audible cue signaling via latched/unlatched triggering.
Needle retraction by anchoring geometry through conventional compliant stopper
A needle having proximal and distal ends with a proximal anchoring geometry configured to at least partially penetrate the stopper member such that inserting the stopper member to the distal end of the interior medicine chamber causes the needle to be pulled proximally through the stopper member to be at least partially contained within the interior medicine chamber; the stopper member is a conventional off-the-shelf compliant stopper comprising an unmodified solid compliant member having a distally facing surface formed from one material continuous from one side of an interior of the syringe body across a center of the distally facing surface to an opposite side, with no recesses or projections in the distally facing surface.
Energy storage plunger with stored and released modes and needle retention coupling
A plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body, the plunger member comprising an energy storage member having a first stored mode and a second released mode; and a needle retention feature configured to selectively couple the needle proximal end and the energy storage member such that inserting the stopper member to the distal end of the interior medicine chamber causes the needle to be pulled proximally through the stopper member.
Mode-linked latching and audible cue for needle retraction
A latching member having a latched mode and an unlatched mode respectively corresponding to the first and second modes of the energy storage member, wherein triggering the latching member from the latched mode to the unlatched mode results in an audible cue that signifies the latching member has been triggered and the needle has been retracted.
Unlatching member movement to shift energy storage from stored to released
An unlatching member configured such that the needle proximal end moving the unlatching member causes the energy storage member to move from the first mode to the second mode.
The claim set covers a manually actuated injection system in which a needle anchored to the plunger/energy storage arrangement penetrates a conventional off-the-shelf compliant stopper during stopper insertion, retracting the needle proximally into the syringe interior medicine chamber. The needle retraction is coordinated with an energy storage member having first stored and second released modes, with an optional latching/unlatching structure that produces an audible cue signifying needle retraction.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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