Multi-stage gas-actuated drug delivery device and method

Abstract

The invention discloses a multi-stage gas-actuated drug supply device and method. The invention relates to a multi-section type gas-actuated medicine supply device which is connected with a medicine injection container. The multi-section type gas-actuated medicine supply device comprises a gas supply unit, the push rod unit is composed of a plurality of hollow pipes, one end of the push rod unit is connected with the air supply unit, and the hollow pipes can be stretched through air; the top of the push rod is connected with the other end of the push rod unit and extends along the plurality of hollow pipes to push a medicament; the air chamber penetrates through the push rod unit, is connected with the air supply unit and is used for accommodating air and extending a plurality of hollow pipes along with the increase of the air so as to further expand the air chamber; the limiting part is positioned at the connecting end of the connected hollow pipe and is used for limiting the telescopic length of the hollow pipe; and the airtight piece is positioned at the connecting end of the connected hollow pipes and is used for sealing the air chamber.

Description

technical field [0001] The invention relates to a multi-stage gas actuated medicine supply device, in particular to an actuated medicine supply device and method requiring small volume and preventing gas leakage. Background technique [0002] The treatment of many chronic diseases requires the subcutaneous administration of drugs or therapeutic agents in precisely controlled doses, either continuously or at specific time intervals. Subcutaneous injection, a common method of delivering drugs into the body, allows the drug to be slowly absorbed in the body over a longer period of time (compared to direct injection into a blood vessel). Currently, pen or patch injectors using primary containers (prefilled syringes or prefilled cartridges) such as pen injectors, auto-injectors, and wearable injectors have been developed to enable users to self-inject the drug into their own in the body. However, these conventional pen-type injectors utilize springs or tiny motors to generate a...

AI Technical Summary

Problems solved by technology

During this dosing process, there is a risk of contamination of the drug by leakage of electrochemically generated high-pressure gas through leak sites in the separating member (such as a defect in a septum, container wall, or movable barrier)

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