Vented Drug Reservoir Unit
First Claim
1. A reservoir unit (100, 200, 300, 400) comprising:
- a housing defining an interior, the housing comprising a transparent window portion (103, 203, 303, 403) having an interior surface,a vent (110, 211, 310, 411) allowing ambient air and aqueous vapour to pass between the interior of the housing and the exterior,a reservoir (150, 250, 350, 450) arranged within the interior of the housing, the reservoir defining an interior adapted to contain a fluid drug, the reservoir comprising a transparent portion allowing a user to inspect at least a portion of the contained drug through the transparent window portion and the transparent reservoir portion,wherein the reservoir unit is adapted to be moved from a first stable condition at 5°
C. and 0-100% relative humidity, to a second stable condition at 40°
C. and 75-100% relative humidity, with no visible water condensing on the interior surface of the window portion, andwherein the vent is adapted to provide 80% pressure equalization between the interior of the housing and the exterior at a pressure differential of 350 mBar in less than 60 minutes.
1 Assignment
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Accused Products
Abstract
A reservoir unit (200) is provided comprising a housing (201) in which a reservoir (250) with a transparent portion (251) is arranged, the housing comprising a window (203) allowing a portion of the reservoir to be inspected. The reservoir unit is adapted to be moved from a first “cold” condition to a second “warm” condition with no visible water condensing on the interior surface of the window portion. Further, a vent (210, 211) is adapted to provide pressure equalization between the interior of the housing and the exterior. In this way it is possible to perform visual inspection of the reservoir at all times without being confused by dew or condensed water drops, e.g. when a prefilled reservoir unit containing a drug which requires storage at a given low temperature, as is the case for insulin-containing drugs, is taken out in ambient temperature.
66 Citations
25 Claims
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1. A reservoir unit (100, 200, 300, 400) comprising:
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a housing defining an interior, the housing comprising a transparent window portion (103, 203, 303, 403) having an interior surface, a vent (110, 211, 310, 411) allowing ambient air and aqueous vapour to pass between the interior of the housing and the exterior, a reservoir (150, 250, 350, 450) arranged within the interior of the housing, the reservoir defining an interior adapted to contain a fluid drug, the reservoir comprising a transparent portion allowing a user to inspect at least a portion of the contained drug through the transparent window portion and the transparent reservoir portion, wherein the reservoir unit is adapted to be moved from a first stable condition at 5°
C. and 0-100% relative humidity, to a second stable condition at 40°
C. and 75-100% relative humidity, with no visible water condensing on the interior surface of the window portion, andwherein the vent is adapted to provide 80% pressure equalization between the interior of the housing and the exterior at a pressure differential of 350 mBar in less than 60 minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 24, 25)
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19. A pocket-sized reservoir unit (100) comprising:
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a housing defining an interior, the housing comprising a transparent window portion (103) having an interior surface, a vent (110) allowing ambient air and aqueous vapour to pass between the interior of the housing and the exterior, a reservoir (150) arranged within the interior of the housing, the reservoir defining an interior adapted to contain a fluid drug, the reservoir comprising a transparent portion allowing a user to inspect at least a portion of the contained drug through the transparent window portion and the transparent reservoir portion, wherein the vent allows a flow of less than 7.5 litre per hour at a pressure differential of 500 mBar between the interior of the housing and the exterior. - View Dependent Claims (20, 21, 22, 23)
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Specification