Dry powder administration device

Abstract

The invention discloses a dry powder administration device, and belongs to the field of administration sets. The dry powder administration device comprises a flow channel component, a medical powder storage container and an administration metering component, and is characterized in that: a shell is arranged; the upper part of the shell is provided with the inverted-cone-shaped medical powder storage container; a ring-shaped manual rotary part is arranged at the periphery of the upper part of the shell; a rotary slipway is arranged on the outer surface of the upper part of the shell, and a slide block is arranged corresponding to the inner side face of the ring-shaped manual rotary part; a first elastic part is arranged between the ring-shaped manual rotary part and the upper part of the shell; an air inlet is formed at one end of the rotary slipway; the flow channel component is arranged in the shell; a suction nozzle is arranged on the outer side of the shell and a suction nozzle sleeve is arranged outside the suction nozzle; a medicine inlet is arranged on the horizontal part of the flow channel component; the administration metering component is arranged below the inverted-cone-shaped medical powder storage container; and the flow channel component is connected with the air inlet, the administration metering component and the suction nozzle through air channels in turn. By adopting an air inlet omniseal structure, before medical powder is added, the medical powder metering component is dried and can accurately meter the dosage of the medical powder and avoid 'excessive dosage' administration.

Description

technical field [0001] The invention belongs to the field of devices for injecting media into the human body, and in particular relates to an inhalation drug delivery device for sending a prescribed dose of dry powder medicine into the mouth of a patient. Background technique [0002] In modern medical technology, the routes of administration to patients usually include oral administration, inhalation, sublingual administration, external application, rectal administration, and injection. [0003] Because inhalation through the mouth or nose can make the drug directly absorbed into the blood through the mucous membrane of the mouth or nose, and can bypass the "first-pass" effect of the liver, so for the treatment / administration of many diseases (the most common is asthma), The fastest-acting way of administration is the first way to inhale through the mouth (or nose). [0004] Existing devices for treating respiratory diseases such as asthma and inhalation drug delivery meth...

AI Technical Summary

Problems solved by technology

[0017] A relatively big problem with dry / micro-powder drug delivery is that powdery particles have a large surface energy and are prone to form "agglomerated" states, thus causing great difficulties in the metering of each dose of reservoir-type drugs

[0018] Moreover, in the existing commercially available storage-type dry powder drug delivery device and the product structure disclosed in the technical solution of Chinese patent ZL 98805080.3, since the dry powder metering device is a through hole, powder leakage is prone to occur, and there is no guarantee that it can be avoided. The problem with "overdosing"

[0019] In addition, the commercially available products of the existing storage-type dry powder drug delivery device, the air inlet / hole communicating with the flow channel is usually opened on the housing, when the protective cover / shell of the dry powder drug delivery device is removed After it is lowered, the air inlet is exposed to the air, resulting in the air passageway (air inlet / hole-flow channel-powder container-suction nozzle) in the dry powder drug delivery device that communicates with the powder container in a "communication with the outside world". In the normally open state, the moisture contained in the outside air can easily enter the powder container, causing the dry powder in the powder container to be easily "damp" and agglomerated, affecting the accuracy and use effect of dosing and metering

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