A deagglomerator (10) for use with a breathing-actuated dry powder inhaler that includes a dry powder delivery passage and a dry powder container to expose a predetermined amount of dry powder to the dry powder administration passage, the deagglomerator comprising: an internal wall (12) defining a turbulence chamber (14) that extends along an axis (A) from a first end to a second end； a dry powder supply port (22) at the first end (18) of the turbulence chamber (14) to provide fluid communication between a dry powder delivery passage of an inhaler and the first end (18) of the turbulence chamber (14)； at least one inlet port (24) on the inner wall (12) of the turbulence chamber (14) adjacent to the first end (18) of the turbulence chamber (14) that provides fluid communication between a region outside the deagglomerator and the first end (18) of the turbulence chamber (14)； an outlet port (32) that provides fluid communication between the second end (20) of the turbulence chamber (14) and a region outside the deagglomerator (10)； and vanes (26) at the first end (18) of the turbulence chamber (14) extending at least partially outwardly radially from the axis (A) of the chamber, each of the vanes (26) having an oblique surface oriented at least in part in a direction transverse to the axis (A)； whereby a low pressure induced by breathing at the outlet port (32) causes air flows in the turbulence chamber (14) through the dry powder supply port (22) and the inlet port (24), characterized in that the turbulence chamber (14) includes generally circular cross-sectional areas arranged coaxially around the axis (A) and the at least one input port (24) extends in a direction substantially transverse to the axis (A) and substantially Tangential to circular cross-sectional areas.Un desaglomerador (10) para su uso con un inhalador de polvo seco accionado por respiración que incluye un pasadizo de administración de polvo seco y un depósito de polvo seco para exponer una cantidad
