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A pen cap or a pen cap assembly for an injection pen

IP.com Disclosure Number: IPCOM000248060D
Publication Date: 2016-Oct-21
Document File: 28 page(s) / 7M

Publishing Venue

The IP.com Prior Art Database

Related People

Stefan Burren: INVENTOR [+3]

Abstract

A pen cap for an injection pen comprising a housing or a housing part and a cartridge holder. The cartridge holder is connected to the distal end of the housing or housing part for holding a cartridge containing a medication, the cartridge holder having a second connector present at the distal end for connecting a needle hub of an injection needle to the cartridge holder. The pen cap comprises a first connector at the proximal end of the pen cap for connecting to a counter-connector present at the distal end of the housing or housing part or at the proximal end of the cartridge holder of the injection pen. Said first connector forms a releasable connection of the pen cap to the injection pen when the pen cap is moved along the longitudinal axis of the injection pen from a first position where the first connector and counter-connector are not connected, to a second position establishing the connection between the first connector and the counter-connector thereby fully enclosing the cartridge holder. The pen cap is characterised by that it has means for preventing the formation of the releasable connection of the pen cap to the injection pen when the needle hub of the injection needle is connected to the second connector of the cartridge holder.

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A pen cap or a pen cap assembly for an injection pen

Background

Injection devices are used for the subcutaneous delivery of liquid medicaments to a patient. Such injection devices are often pen-shaped, having a long axis and are called injection pens. The injection pens comprise a housing, which can hold a dose setting and dose delivery mechanism. The medication is preferably present in a cartridge or in a prefilled syringe. A cartridge is normally attached to the housing of the injection pen using a cartridge holder and a prefilled syringe is held by a syringe holder that is engaged directly or indirectly with the housing.

The term "medicament" or "medication" includes any flowable medical formulation suitable for controlled administration through a means such as, for example, a cannula or a hollow needle and comprises a liquid, a solution, a gel or a fine suspension containing one or more medical active ingredients. A medicament can be a composition comprising a single active ingredient or a pre-mixed or co-formulated composition with more than one active ingredient present in a single container. Medication includes drugs such as peptides (e.g., insulin, insulin-containing drugs, GLP-1 containing drugs or derived or analogous preparations), proteins and hormones, active ingredients derived from -or harvested by- biological sources, active ingredients based on hormones or genes, nutritional formulations, enzymes and other substances in both solid (suspended) or liquid form but also polysaccharides, vaccines, DNA, RNA, oligonucleotides, antibodies or parts of antibodies but also appropriate basic, auxiliary and carrier substances.

Such cartridges are preferably made from glass and have a cylindrical shape, which is narrowed at one end and closed by a pierceable septum. The open end of the cylinder is closed off with plug after having been filled with the liquid medication. The liquid medication is thus present between the septum and the plug. The cartridge is attached to the housing, or a to a housing part using a cartridge holder. The cartridge holder has a cylindrical shape which is open on one side to receive the cartridge and which has a narrow section having a connector for connecting a needle to the cartridge holder. The needle has one sharp end for penetrating the septum and the opposite end of the needle is intended for piercing the skin of a patient. Such needles are held in a needle hub, which has the correct dimensions to fit onto the connector of the cartridge holder and properly align the needle for piercing the septum of the cartridge


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and holding the needle hub to the cartridge holder. The cartridge holder and the connector of the cartridge holder are preferably cylindrically shaped, with a central axis that coincides with the central axis of the injection pen.

The injection needles of the prior art comprise a needle and the needle hub as described previously. Additionally the distal end of the needle...