Abstract: An aerosol medication delivery apparatus which includes a novel particle generator for generating very small particles of medicament, a valving mechanism and an expansion chamber which permits medication to be delivered to the patient through a conventional inhalation mouthpiece or face mask. The apparatus also includes a filter unit for filtering the patient's exhaled breath and a unique baffling arrangement which functions to decrease average aerosol particle size for better targeting of the desired lung area. In one form of the invention, the particle or aerosol generator operates on a direct pressure technique wherein an elastomeric delivery tube is intermittently compressed and released to generate the very small particles of medicament.

Abstract: An apparatus for use in respiratory diagnostic procedures and respiratory therapy in the field of medicine. The apparatus of the inventions generates sub-micron size radioactive particles for use in performing ventilation studies of the lungs in a novel manner using a nebulizer and a combination of baffles and a settling chamber which function to remove larger radioactive particles from the mist generated by the nebulizer through impaction, turbulence and sedimentation.

Abstract: A carrier material is combined with Tc-99m and the resulting radiolabeled reagent is combined with a known ulcer-specific compound. The resultant agent, because of the ulcer-specific compound, tends to accumulate at the site of an ulcer in the digestive tract. The presence of localized concentrations of Tc-99m in the digestive tract indicates the existence and location of an ulcer. The Tc-99m is detected in the digestive tract by conventional radioimaging procedures.