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Publication Number
US-11964141-B2
Publication Date
2024-04-23
Expiration Date
Abstract
A system for injecting includes a syringe body having proximal and distal ends, a syringe interior, and a syringe flange at the proximal end thereof. The system also includes a stopper member disposed in the syringe interior. The system further includes a plunger member coupled to the stopper member. The plunger member includes a rotatable member configured to insert the stopper member distally in the syringe interior relative to the syringe body with rotation of the rotatable member. The plunger member further includes a proximal portion proximal of the rotatable member configured to be moved distally to also insert the stopper member distally in the syringe interior relative to the syringe body to eject about microliters of fluid from the syringe interior.
Core Innovation
The invention is a system for injecting that includes a syringe body with proximal and distal ends, a syringe interior, and a syringe flange at the proximal end. A stopper member is disposed in the syringe interior and a plunger member is coupled to the stopper member. A finger flange is removably coupled to the syringe flange, and the finger flange includes proximally directed external threads.
A rotatable member is disposed on the proximally directed external threads and is configured to insert the stopper member distally in the syringe interior relative to the syringe body with rotation of the rotatable member. The plunger member further comprises a portion located proximal of the rotatable member and configured to be moved distally to further insert the stopper member distally in the syringe interior relative to the syringe body.
The rotatable member has an opening through which the plunger member is disposed, and the rotatable member is configured to insert the plunger member and the stopper member coupled thereto distally in the syringe interior relative to the syringe body with rotation of the rotatable member relative to the proximally directed external threads. The described system is directed to microdose injection and includes low-profile storage configurations and safety behaviors that relate to preventing premature or unintended injection and controlling injected volume.
Claims Coverage
The provided independent claim set includes two independent claims. Across these independent claims, the main inventive features are organized around threaded coupling, rotation-driven distal insertion of a stopper and plunger, and structural features that enable further distal movement and defined interaction of a rotatable member with the plunger member.
Rotation-driven distal insertion of stopper via external threads
A syringe system with a rotatable member disposed on proximally directed external threads and configured to insert the stopper member distally in the syringe interior relative to the syringe body with rotation of the rotatable member.
Further distal movement of a proximal plunger portion
The plunger member comprises a portion located proximal of the rotatable member and configured to be moved distally to further insert the stopper member distally in the syringe interior relative to the syringe body.
Opening-in-rotatable-member interface for plunger and distal insertion by rotation
A system where a rotatable member disposed on the proximally directed external threads has an opening through which the plunger member is disposed, and the rotatable member is configured to insert the plunger member and the stopper member coupled thereto distally in the syringe interior relative to the syringe body with rotation relative to the proximally directed external threads.
Together, the independent claims focus on inserting a stopper member and a coupled plunger member distally into the syringe interior using a rotatable member that engages proximally directed external threads, with additional structure enabling distal movement of a proximal plunger portion and a defined opening-based interface between the rotatable member and the plunger member.
Stated Advantages
Reduced storage footprint, including removable or telescoping/folded/self-erecting plunger members with finger flanges and latching/stopper coupling.
Precision in controlling injected volume for microdose injection.
De-bubbling in a vertical position using a rotatable threaded microdose adapter.
Anti-needle-stick/safety behaviors, including safety/plunger cap prevention of premature injection and safety member preventing distal movement.
User-end-of-dose feedback including visual red-gap indicator and tactile/audible spring-arm click.
Documented Applications
Microdose injection, including intraocular injection and microdose injection/withdrawal for substantially similar volumes.
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