Device for infusion of fluids
Inventors
CARBONE, Domenico Carmelo • RECCA, Giuseppe Renato Massimo • MARAVIGNA, Arturo
Assignees
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Publication Number
US-11324884-B2
Publication Date
2022-05-10
Expiration Date
Abstract
A device for infusion of medical fluids is provided. It has an internal reservoir for a fluid to be administered made of a first flexible base material to vary its volume as a function of the quantity of fluid present thereinside; and an outer casing containing the reservoir, having a side wall made of a second elastic base material suitable to make elastically deformable the casing to vary the geometry and internal volume thereof as a function of the volume of the reservoir.
Core Innovation
The invention relates to a device for infusion of fluids that includes an internal reservoir made of a first flexible base material configured to vary its volume as a function of the quantity of fluid present thereinside. The internal reservoir is made of a non-elastomeric thermoplastic material and is fluidically connectable to an infusion line adapted for administering the fluid. An outer casing contains the reservoir and comprises a side wall made of a second elastic base material suitable to make the casing elastically deformable to vary its geometry and internal volume as a function of the volume of the reservoir.
The outer casing further comprises a pair of front walls respectively made of a third rigid or semi-rigid base material, positioned relative to the side wall so that the side wall and the pair of front walls together surround the reservoir. In this arrangement, the reservoir is not exposed to an outer environment except through the infusion line. The reservoir has an opening adapted to be placed selectively in fluidic communication with the infusion line to allow both the introduction of the fluid thereinside and the administration of the fluid at the outside.
At the opening, each front wall has a recess, where the recesses are mutually mirrored structures about a shared plane and configured so that in a configuration of minimum overall dimensions of the device the opening is surrounded in a compartment defined by the recesses. Filling-in with the fluid causes an increase in volume of the internal reservoir, which in turn causes an increase in volume of the outer casing. After the fluid administration, the volume of the outer casing and thus the volume of the device decreases proportionally to the volume of supplied fluid.
Claims Coverage
The independent claim includes five principal inventive features: an internal non-elastomeric thermoplastic reservoir fluidically connected to an infusion line; an outer elastic casing with a deformable side wall; rigid or semi-rigid front walls that surround the reservoir except through the infusion line; a selectively communicable opening with mirrored recesses forming a compartment at minimum overall dimensions; and proportional volume increase and decrease with filling and administration.
Non-elastomeric thermoplastic internal reservoir that varies volume with fluid quantity
An internal reservoir for a fluid to be administered made of a first flexible base material configured to vary its volume as a function of the quantity of fluid present thereinside, the first base material being a non-elastomeric thermoplastic material, the reservoir being fluidically connectable to an infusion line adapted for administering the fluid.
Outer elastic, elastically deformable casing surrounding the reservoir
An outer casing containing the reservoir, wherein the outer casing comprises a side wall made of a second, elastic base material suitable to make elastically deformable the casing to vary the geometry and internal volume as a function of the volume of the reservoir.
Rigid or semi-rigid front walls enclosing the reservoir except through the infusion line
A pair of front walls respectively made of a third rigid or semi-rigid base material, positioned so that the side wall and the pair of front walls together surround the reservoir in a manner such that the reservoir is not exposed to an outer environment except through the infusion line.
Selectively communicable reservoir opening and mirrored recess compartment at minimum dimensions
A reservoir opening adapted to be placed selectively in fluidic communication with the infusion line to allow both the introduction of the fluid thereinside and the administration of the fluid at the outside, with each front wall having a recess, the recesses being mutually mirrored structures about a shared plane and configured so that in a configuration of minimum overall dimensions the opening is surrounded in a compartment defined by the recesses.
Proportional volume increase on filling and proportional volume decrease after administration
Filling-in with the fluid causes an increase in volume of the internal reservoir, which in turn causes an increase in volume of the outer casing, and after the fluid administration the volume of the outer casing and thus the volume of the device decreases proportionally to the volume of supplied fluid.
The independent claim covers an infusion device combining a volume-varying non-elastomeric thermoplastic internal reservoir with an elastically deformable outer elastic casing and rigid or semi-rigid front walls that enclose the reservoir except through the infusion line. It also requires a selectively communicable reservoir opening with mirrored recesses forming a compartment at minimum overall dimensions, and proportional volume increase during filling and proportional volume decrease after administration.
Stated Advantages
Avoidance of silicone contact via a silicone-free, non-elastomeric thermoplastic reservoir option.
Progressive reduction of overall dimensions from maximum (filled) to compact (empty) by proportional decrease of the outer casing volume after administration.
Compatibility with replacing gravity-based drips to reduce stand/overall bulk and allow mobility.
Documented Applications
Replacing gravity-based drips to reduce stand/overall bulk and allow mobility.
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