Abstract: A method for delivering dry powder particles through the mouth of a user, in which a suction is created through an opening in a proximal end of an elongated housing for drawing air into a flow path in the housing from an opening in a distal end of the housing, the distal end including an opening in the housing with a ridge surrounding the housing, and through a resistance member in the housing for introducing a controlled pressure drop in the housing and a resistance to the drawing of air into the mouth of the user.

Abstract: A dry powder delivery system having an elongated tube containing a matrix having a measured mount of dry particles of therapeutic compound and a porous element having a desiccant therein is disclosed. The porous element with the desiccant can be combined with the powder-containing matrix or it can be two separate elements. The pressure drop induced by inhalation of the user causes air to flow through the tube and into contact with the particles of dry powder for discharging the particles for inhalation by the user.

Abstract: A cap structure for application to the head of a patient to create a cold environment around the scalp portion of the patient during cytotoxic treatment, thereby to reduce alopecia which might arise as a result of the treatment. The cap structure is comprised of a plurality of individual cap structure forming sections or panels with each panel having at least one internal chamber. A substance in each of these internal chambers is capable of being subjected to and achieving a reduced temperature, and of retaining a reduced temperature for a substantial period of time. The cap sections are connected together by flexible members in order to facilitate conforming the cap structure to the patient. The cap structure may include an upper section, two side sections and a rear section, which sections may be fastened together for use, and unfastened for cleaning and/or storage. The cap structure could also be comprised of a unitary member which may be provided with a plurality of panels separated by flexible members.