Medical tube

A medical tube comprising a conduit, the conduit formed from a spirally wound bead and a spirally wound film, wherein:

• the spirally wound bead forms a plurality of successive coils, each of the plurality of successive coils having an internal diameter and an external diameter;
• and
• the spirally wound film extends between adjacent coils of the bead wherein the film is bonded at a first location on a surface of a first coil of the bead and at a second location on a surface of a second coil of the bead, wherein the first coil is adjacent to the second coil,
• wherein the first location and the second location are located between the internal diameters and external diameters on opposed sides of respective first and second adjacent coils such that the spirally wound film extending between the first and second adjacent coils of the bead does not overlap any sections of the spirally wound film extending between further adjacent coils of the bead;
• wherein the spirally wound film is inwardly biased between the first coil and the second coil of the bead such that the spirally wound film extends inwards from the internal diameter by an inward bias distance towards a longitudinal axis of the conduit when the medical tube is at rest and such that an inner surface of the spirally wound film facing the longitudinal axis is convex and an outer surface of the spirally wound film facing radially outwardly from the longitudinal axis is concave when the medical tube is at rest, the inward bias distance being a radial distance between the internal diameter of one or both of the first coil and the second coil and a point of the film located closest to the longitudinal axis when the medical tube is at rest, wherein the inward bias distance is between about 0.1 mm and about 0.3 mm when the medical tube is at rest.