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A medical injection device having a sealable cleaning reservoir

一种注射装置、贮存器的技术，应用在医疗注射装置领域，能够解决细菌进入等问题

Inactive Publication Date: 2018-06-08
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bacteria may enter the clean reservoir when it is connected to the surrounding environment

Method used

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  • A medical injection device having a sealable cleaning reservoir
  • A medical injection device having a sealable cleaning reservoir
  • A medical injection device having a sealable cleaning reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1, Figure 1-2 :

[0071] figure 1 with figure 2 The distal end of the pen-shaped injection device 1 is disclosed schematically. The housing, not shown, supports a cartridge 10 filled with liquid medicine to be injected. To facilitate injection, the needle cannula 20 is provided with a proximal portion 21 penetrating into the cartridge 10 and a distal portion 22 with a distal tip 23 that will penetrate through the user's skin during injection. The surface of the user's skin is generally indicated below with an "S" symbol.

[0072] Between injections, the distal portion 22 or at least the distal tip 23 is maintained inside the clean reservoir 31 carried by the axially movable shield 40 . This movable shield 40 moves in the proximal direction during injection, and the injection itself can be spring driven by a spring motor that is released to expel the cartridge 10 in response to the proximal movement of the movable needle shield. Set dose of liquid medic...

Embodiment 2

[0085] Example 2, Figure 3-5 :

[0086] exist Figure 3 to Figure 5 Different embodiments are disclosed in , wherein like elements are numbered with the same reference numerals, however preceded by a "1".

[0087] Such as image 3 As seen in , the needle cannula 120 is fixed in a hub 125 that is permanently or removably attached to the housing 102 .

[0088] Such as image 3 As disclosed in , when the user pumps liquid medication through the cavity 124 of the needle cannula 120 and into the clear reservoir 131, air and any remaining liquid medication will flow through the radial opening 134 and into the In the parallel chamber 135 in. Via this parallel chamber 135, the liquid drug will flow through the cavity 153 of the tube 152 and into the overflow chamber 142 provided in the axially movable shield 140, henceforth cleaning inside the reservoir 131 during filling. Any pressure built up is quickly compensated.

[0089] Filling of the cleaning reservoir 131 is prefera...

Embodiment 3

[0095] Example 3, Figure 6-10 :

[0096] exist Figure 6 to Figure 10 Further examples are disclosed in . In this third embodiment, similar elements are numbered using the same reference numerals, preceded by a "2".

[0097] exist Image 6 A perspective view of the distal portion of the tube 230 is disclosed in . The tube 230 is carried by an axially movable shroud, as in the first embodiment. Distal septum 232 is in an initial position axially removed from tube 230 such that a gap “Y” is provided between tube 230 and distal septum 232 . this may be in Figure 7 best seen in.

[0098] The distal septum 232 is carried by a metal clip 260 having a plurality of proximally directed short arms 261 securing the distal septum 232 to the metal clip 260 and a plurality of longer arms 262 securing the metal clip 260 to the tube 230 . In the center, the metal clip 260 is provided with an opening 264 through which the distal tip 223 of the needle cannula 220 penetrates during ...

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PUM

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Abstract

The present invention concerns a medical injection device for apportioning set doses of a preservative containing liquid drug. The injection device comprises a housing supporting a cartridge containing the preservative containing liquid drug and a needle cannula for transfer- ring the liquid drug from the cartridge and through the skin of a user. Further, a needle shield which is axially movable in relation to the housing is also present. The axially movable shield carries a cleaning reservoir for cleaning at least the tip of the needle cannula between sub- sequent injections and the cleaningreservoir is preferably filled with preservative containing liquid drug directly from the cartridge upon initiation of the injection device. In order to eliminate any overpressure being built up inside the cleaning reservoir during the filling process, the cleaning reservoir is provided with an outlet configured to be permanently sealed by a user activated operation.

Description

technical field [0001] The present invention relates to a medical injection device having a shielded needle cannula. The invention relates in particular to such injection devices in which a shielded needle cannula is provided for repeated use and the distal tip of the needle cannula which penetrates into the user's skin during an injection is cleaned between subsequent injections. Background technique [0002] Injection devices in which the tip of the needle cannula is maintained in a cleaning solvent between subsequent injections are disclosed in US 3,354,881 , US 4,416,663 and WO 2014 / 064100. As can be seen from these prior art injection devices, the clean chamber or reservoir is usually carried distally on a retractable shield that covers the tip of the needle cannula between subsequent injections. [0003] WO 2014 / 064100 discloses a prefilled disposable injection device having an axially movable shield covering the distal tip of a needle cannula between subsequent injec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/00A61M5/24A61M5/32
CPCA61M5/24A61M5/3202A61M5/326A61M2005/3267A61M5/001A61M5/2033A61M5/2466A61M5/3257
Inventor B.G.拉森C.普拉贝奇L.埃勒特森M.恩格斯勒夫R.阿奇拉S.D.詹森
Owner NOVO NORDISK AS