Evaluation of a Dry Powder Aerosol Dispersion Mechanism by Radiolabeling Techniques

University of North Carolina, Chapel Hill6 enrolled

Overview

The primary objective is to admix a radiolabel with albuterol sulphate for incorporation into the Handihaler® device for inhalation studies. This will allow for the investigators to determine the regional lung deposition of drug inhaled from the standard Handihaler® device compared to a novel modification of the device to provide more effective dispersion and aerosolization of the coated albuterol powder. The new mechanism of action for proof-of-concept testing consists of a bead (5.1 mm; expanded polystyrene foam) coated with drug powder, as opposed to the standard lactose formulation-filled capsule.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Enrollment

Conditions

Adult Healthy Volunteers

Interventions

subjects randomized to receive 1 inhaled dose on 2 separate days, each dose delivered 2-3 days apart. The radiolabeled albuterol drug powder will be dispersed from either the DET bead-HandiHaler prototype or via the established HandiHaler device standard with the lactose-albuterol formulation provided to us by the sponsor.

standard Handihaler DPIDEVICE

Outcomes

Primary Outcomes

Fractional delivery of dry powder to the lung

To compare the in vivo performance,i.e. the fraction of drug loaded in device that is delivered to the lung, of the novel system in comparison with a standard marketed dry powder inhaler (DPI) using radio-imaging techniques. The fraction delivered to the lung will be determined by gamma camera imaging of the lungs following inhalation of the radiolabeled powder from the standard vs. new device.

Time frame: 1-5 minutes post inhalation