| abstract |
Disclosed is a sample collection device comprising an inlet, an outlet and an undeviating conduit. The undeviating conduit has an internal surface extending between the inlet and outlet, the internal surface having a profile change through which a breath expelled into the inlet passes towards the outlet. The profile change slows the expelled breath to cause lower respiratory tract substances to deposit on the internal surface of the conduit. In specific embodiments, the profile change increases an area of the internal surface, comprises a plurality of ridges constricting an internal cross-section of the conduit, forms a plurality of channels, has a polygonal cross-section, comprises a spiralling ridge or increases a length of the conduit. In a more specific embodiment, the sample collection device comprises at least one reversed output channel and at least one transverse outlets for directing flow from the at least one reversed output channels transversely of the conduit. |