Hinged Blinding Shell for Inverted Vial Administration
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Solution Overview
Problem
Conventional blinding shells for vials used in intravenous drug administration are not designed for vials that need to be suspended in an inverted orientation, and they often require different shell configurations for varying vial sizes, which can compromise the blinding effect in clinical trials.
Innovation Solution
A vial blinding assembly comprising a vial with a bottle, stopper, and retainer, and a blinding shell with an encircling sidewall, shield wall, and floor, where the blinding shell is hingedly coupled and covers the vial except for the septum, allowing for secure friction fit connections and opaque design to maintain blinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional blinding shells are used for vials, then the blinding effect is maintained, but they cannot accommodate vials that need to be suspended in an inverted orientation for intravenous administration
Solution Approach 1:
The blinding shell incorporates a hinged lid that can move between open and closed positions, allowing the shell to adapt to different operational states (loading vs. blinding) while maintaining the blinding function when closed. This dynamic structure enables the shell to accommodate inverted orientation requirements without compromising the blinding effect during administration.
2Ease of operation
If different sized blinding shells are used for different sized vials, then each vial is properly enclosed, but the patient and administering personnel can visually differentiate the configurations, compromising the blinding effect
Solution Approach 1:
The blinding shell is designed with a standardized external configuration that remains consistent regardless of the internal vial size or type. The shell includes a uniform opaque exterior, standardized lid structure, and consistent mounting features, allowing it to universally accommodate different vial configurations while presenting a uniform appearance to patient and administering personnel, thereby preventing visual differentiation.
3Reliability
If the blinding shell completely encloses the vial, then maximum blinding is achieved, but access to the septum for drug administration is blocked
Solution Approach 1:
The blinding shell is segmented into a main body and a hinged lid portion. The lid can be opened to provide access to the septum and vial for drug administration, then closed to restore the blinding effect. This segmentation allows the shell to alternately provide maximum enclosure for blinding and controlled access for administration without compromising either function.
4Reliability
If the blinding shell is made opaque to prevent visual detection, then the blinding effect is maintained, but visual inspection of the vial contents or configuration is prevented
Solution Approach 1:
The hinged lid provides a dynamic opening mechanism that allows temporary visual inspection and access when needed, then returns to a closed opaque state to maintain blinding. The lid can be opened by administering personnel to inspect vial contents or configuration, then securely closed to restore the opaque blinding barrier, thus alternating between inspection capability and blinding maintenance.
Data Source
AI summary
A vial blinding assembly includes a vial having a stopper with a needle penetrable septum that is aligned with a compartment of the vial. A blinding shell has an interior surface that bounds a cavity, the vial being disposed within the cavity. The blinding shell includes: an encircling sidewall extending between a first end and an opposing second end; a shield wall inwardly projecting from the first end of the sidewall and encircling an access opening, the access opening communicating with the cavity of the blinding shell and being aligned with the septum of the stopper; and a floor inwardly projecting from the second end of the sidewall so as to block access to the cavity at the second end, wherein the blinding shell comprises a first shell portion and a second shell portion that are hingedly coupled together. In one embodiment, a hanging tab outwardly projects from the floor of the blinding shall and has a mounting hole extending therethrough.