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Prefilled injection device with cleaning chamber

An injection device and pre-filling technology, which is applied in the field of pre-filled injection devices, pen-shaped and pre-filled injection devices, and can solve problems such as certain failures and broken injection devices

Inactive Publication Date: 2019-07-19
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some examples, the droplet will eventually be seen by the user, leading the user to conclude that the injection device is broken or has some kind of malfunction

Method used

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  • Prefilled injection device with cleaning chamber
  • Prefilled injection device with cleaning chamber
  • Prefilled injection device with cleaning chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] When terms such as "upper" and "lower", "right" and "left", "horizontal" and "vertical", "clockwise" and "counterclockwise" or similar relative expressions are used hereinafter, these expressions Refers to drawings only and does not refer to actual usage. The shown figures are schematic representations, for which reason the configuration of the different structures as well as these relative dimensions are intended for illustrative purposes only.

[0052] In this context, it may be convenient to define that the term "distal" in the figures is intended to refer to the end of the injection needle that normally carries the injection device, while the term "proximal" is intended to refer to the end of the injection needle that is directed away from the injection needle and normally carries the dose. Opposite end of dial button.

[0053] "Distal" and "proximal" mean along an axial orientation extending along the longitudinal axis "X" of the injection device, such as figure ...

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PUM

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Abstract

The invention relates to a prefilled injection pen for apportioning multiple set doses of a liquid drug containing a preservative. The injection pen comprises a housing structure which permanently andnon-removable secures a cartridge containing the preservative containing liquid drug. The cartridge is connected to a needle cannula which further has a sharp distal tip for penetrating the skin of auser. The distal tip of the needle cannula is concealed by an axially movable needle shield at least between injections. At the distal end of the axially movable needle shield, a cleaning chamber isprovided which cleaning chamber contains a volume of the same preservative containing liquid drug as present in the cartridge. The cleaning chamber is further provided with an outlet which is open tothe surroundings and through which outlet air and a quantum of the preservative containing liquid drug can escape. In the proximity of the outlet, means are provided to collect the escaped quantum ofthe preservative containing liquid drug.

Description

technical field [0001] The present invention relates to medical injection devices for injecting liquid medicaments, and in particular to prefilled injection devices for proportionally dispensing a plurality of individually settable doses. The present invention particularly relates to pen-shaped and pre-filled injection devices in which the same needle cannula is used for multiple injections and in which the distal tip of the needle cannula is rinsed between subsequent injections. Background technique [0002] Different examples of injection devices for injecting doses of liquid medicament are disclosed in US 3,354,881 , US 4,416,663 and WO 2015 / 173151 and wherein the distal tip of the needle cannula is washed between injections. [0003] The injection device disclosed in WO 2015 / 173151 has a telescopically movable needle shield covering the distal tip of the needle cannula between injections. The removable needle shield carries a purge chamber containing the same preservati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/32A61M5/00A61M5/24
CPCA61M5/001A61M5/24A61M5/326A61M2005/3267
Inventor S.M.佩德森L.埃勒特森R.阿施拉
Owner NOVO NORDISK AS