Dry powder inhalation device

摘要

Taught herein is a disposable breath actuated dry powder drug inhalation device having a powderized drug storage chamber with integral toroidal geometry and air flow pathways for entraining and breaking up powder aggregates prior to delivery to the patient. The toroidal chamber is fluidly connected by one or more air inlets directed in a non-tangent manner toward the powder to loft and set up an irregular-rotational flow pattern. Also, in fluid connection with the toroidal chamber is a centrally or near centrally located air and powder outlet consisting of one or more holes forming a grid in fluid connection with a channel providing a passageway for powder flow to the patient.

主权项

1. A single-dose, disposable inhalation device for inhalation of a pre-metered dry powder drug by a patient, comprising:
a body having an upper portion and a lower portion, the body defining a toroidal disaggregation chamber, the upper portion including an air intake passage and an exit passageway, a bottom portion of the toroidal disaggregation chamber being within the lower portion and containing the dry powder; and a removable partition disposed between the upper portion and the lower portion, the partition retaining the dry powder within the bottom portion of the toroidal disaggregation chamber when the upper portion and lower portion are coupled together, the air intake passage configured to place an external volume in fluid communication with the toroidal disaggregation chamber when the partition is removed; and the exit passageway configured to place the external volume in fluid communication with the toroidal disaggregation chamber when the partition is removed such that upon the inhalation by the patient on the exit passageway, air is drawn from the air intake passage to the toroidal disaggregation chamber and on to the exit passageway to convey the dry powder via the exit passageway to the patient.