Semi-rigid and flexible elements for wearable drug delivery device reservoir
Disclosed are examples of reservoir and reservoir systems usable with a wearable drug delivery device. An example reservoir may include a flexible component coupled to a shell component. The shell component may include drainage channels to facilitate extraction of the liquid drug from the reservoir. A reservoir system example may include an exoskeleton configured around a flexible reservoir to guide the expansion and collapse of the flexible reservoir. Alternatively, one or more rigid panels may be coupled to corresponding flat surfaces of the flexible reservoir to guide the expansion and collapse of the flexible reservoir. A further reservoir example may include a flexible thin film reservoir having peel-able restraints configured to seal off corresponding sections of the reservoir, sequentially break, enabling the liquid drug to sequentially fill corresponding sections in a controlled and predicable manner. A wearable drug delivery device example suitable for utilizing the described examples is provided.
1. A wearable drug delivery device, comprising:
a reservoir for storing a liquid drug, comprising:
a shell component extending in at least one dimension of the reservoir;
a flexible component coupled to the shell component, wherein the coupling is a hermetic seal around a perimeter of the flexible component; and
a port operable to fill and empty the reservoir, wherein the port includes:
a pierce-able septum accessible at a bottom surface of the wearable drug delivery device; and
a central face in a side of the shell component that is in fluid communication with a fluid path to a user of the wearable drug delivery device,
wherein the pierce-able septum is perpendicular to the central face; and
a port opening fluidly coupled to a plurality of drainage channels disposed along an inner surface of the shell component,
wherein the shell component is semi-rigid, configured to store a portion of the liquid drug, and the plurality of drainage channels are configured to direct the liquid drug across the inner surface into the port opening during emptying of the reservoir.
2. The wearable drug delivery device of claim 1 , wherein the shell component is integrated in a chassis of the wearable drug delivery device.
3. The wearable drug delivery device of claim 1 , wherein the shell component comprises an open shell.
4. The wearable drug delivery device of claim 1 , wherein the flexible component is operable to:
expand as the reservoir is filled with a liquid, and
collapse as the reservoir is emptied of the liquid.
5. The wearable drug delivery device of claim 1 , wherein the port is coupled to the shell component.
6. The wearable drug delivery device of claim 1 , wherein the
plurality of drainage channels directly contact the liquid drug when the liquid drug is stored in the reservoir.
7. The wearable drug delivery device of claim 1 , wherein the shell component of the reservoir is positioned against an interior of the bottom surface of the wearable drug delivery device.
8. A wearable drug delivery device, comprising:
a reservoir for storing a liquid drug, comprising:
a shell component;
a flexible component coupled to the shell component, wherein the coupling is a hermetic seal and one or more drainage channels formed into the flexible component; and
a port operable to fill and empty the reservoir, wherein the port includes:
a pierce-able septum accessible at a bottom surface of the wearable drug delivery device; and
a central face in a side of the shell component that is in fluid communication with a fluid path to a user of the wearable drug delivery device, wherein the pierce-able septum is perpendicular to the central face.
9. The wearable drug delivery device of claim 8 , wherein the shell component is integrated in a chassis of the wearable drug delivery device.
10. The wearable drug delivery device of claim 8 , wherein the shell component comprises an open shell and is rigid or semi-rigid.
11. The wearable drug delivery device of claim 8 , wherein the flexible component is operable to:
expand as the reservoir is filled with a liquid, and
collapse as the reservoir is emptied of the liquid.
12. The wearable drug delivery device of claim 8 , wherein the port is coupled to the shell component.
13. The wearable drug delivery device of claim 8 , wherein the reservoir further comprises:
one or more drainage channels formed in the shell component that directly contact the liquid drug when the liquid drug is stored in the reservoir.
14. The wearable drug delivery device of claim 8 , wherein the shell component of the reservoir is positioned against an interior of the bottom surface of the wearable drug delivery device.
15. A wearable drug delivery device, comprising:
a reservoir for storing a liquid drug, comprising:
a shell component;
a flexible component coupled to the shell component, wherein the coupling is a hermetic seal and one or more drainage channels are formed into both the shell component and the flexible component; and
a port operable to fill and empty the reservoir, wherein the port includes:
a pierce-able septum accessible at a bottom surface of the wearable drug delivery device; and
a central face in a side of the shell component that is in fluid communication with a fluid path to a user of the wearable drug delivery device, wherein the pierce-able septum is perpendicular to the central face.
16. The wearable drug delivery device of claim 15 , wherein the shell component is integrated in a chassis of the wearable drug delivery device.
17. The wearable drug delivery device of claim 15 , wherein the shell component comprises an open shell and is rigid or semi-rigid.
18. The wearable drug delivery device of claim 15 , wherein the flexible component is operable to:
expand as the reservoir is filled with a liquid, and
collapse as the reservoir is emptied of the liquid.
19. The wearable drug delivery device of claim 15 , wherein the port is coupled to the shell component.
20. The wearable drug delivery device of claim 15 , wherein the shell component of the reservoir is positioned against an interior of the bottom surface of the wearable drug delivery device.