A medical tube comprising a conduit (2505, 3505, 4505, 5505), the conduit (2505, 3505, 4505, 5505) formed from a spirally wound bead (2560, 3560, 4560, 5560) and a spirally wound film (2540, 3540, 4540, 5540), wherein: the spirally wound bead (2560, 3560, 4560, 5560) forms a plurality of successive coils (2570, 3570, 4570, 5570), each of the plurality of successive coils (2570, 3570, 4570, 5570) having an internal diameter and an external diameter; and the spirally wound film (2540, 3540, 4540, 5540) extends between adjacent coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) wherein the film (2540, 3540, 4540, 5540) is bonded at a first location on a surface of a first coil (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) and at a second location on a surface of a second coil (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560), wherein the first coil (2570, 3570, 4570, 5570) is adjacent to the second coil (2570, 3570, 4570, 5570), characterised in that 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 (2570, 3570, 4570, 5570) such that the spirally wound film (2540, 3540, 4540, 5540) extending between the first and second coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) does not overlap any sections of the spirally wound film (2540, 3540, 4540, 5540) extending between further adjacent coils (2560, 3560, 4560, 5560) of the bead (2560, 3560, 4560, 5560), and in that the spirally wound film (2540, 3540, 4540, 5540) is inwardly biased between the first and second coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) such that the film (2540, 3540, 4540, 5540) extends inwards by an inward bias distance towards a longitudinal axis of the medical tube when the medical tube is at rest, and such that the inner surface of the film (2540, 3540, 4540, 5540) facing the longitudinal axis is convex and the outer surface of the film (2540, 3540, 4540, 5540) facing radially outwardly from the longitudinal axis is concave when the medical tube is at rest, the inward bias distance being: the distance between the internal diameter and the point of the film (2540, 3540, 4540, 5540) located closest to the longitudinal axis when the medical tube is at rest, and between about 0.1mm and about 0.3mm when the medical tube is at rest. the spirally wound bead (2560, 3560, 4560, 5560) forms a plurality of successive coils (2570, 3570, 4570, 5570), each of the plurality of successive coils (2570, 3570, 4570, 5570) having an internal diameter and an external diameter; and the spirally wound film (2540, 3540, 4540, 5540) extends between adjacent coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) wherein the film (2540, 3540, 4540, 5540) is bonded at a first location on a surface of a first coil (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) and at a second location on a surface of a second coil (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560), wherein the first coil (2570, 3570, 4570, 5570) is adjacent to the second coil (2570, 3570, 4570, 5570), characterised in that 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 (2570, 3570, 4570, 5570) such that the spirally wound film (2540, 3540, 4540, 5540) extending between the first and second coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) does not overlap any sections of the spirally wound film (2540, 3540, 4540, 5540) extending between further adjacent coils (2560, 3560, 4560, 5560) of the bead (2560, 3560, 4560, 5560), and in that the spirally wound film (2540, 3540, 4540, 5540) is inwardly biased between the first and second coils (2570, 3570, 4570, 5570) of the bead (2560, 3560, 4560, 5560) such that the film (2540, 3540, 4540, 5540) extends inwards by an inward bias distance towards a longitudinal axis of the medical tube when the medical tube is at rest, and such that the inner surface of the film (2540, 3540, 4540, 5540) facing the longitudinal axis is convex and the outer surface of the film (2540, 3540, 4540, 5540) facing radially outwardly from the longitudinal axis is concave when the medical tube is at rest, the inward bias distance being: the distance between the internal diameter and the point of the film (2540, 3540, 4540, 5540) located closest to the longitudinal axis when the medical tube is at rest, and between about 0.1mm and about 0.3mm when the medical tube is at rest. the distance between the internal diameter and the point of the film (2540, 3540, 4540, 5540) located closest to the longitudinal axis when the medical tube is at rest, and between about 0.1mm and about 0.3mm when the medical tube is at rest.