Heated respiratory hose support helix incorporating lumens

A hose comprising:

• a wall that defines an interior of the hose, wherein:
• a continuous web of plastics material is extruded from a first extruder of a hose making apparatus;
• and
• the extruded web is helically wound about a mandrel or at least one rotating rod of the hose making apparatus to form a wall of the hose about a central axis of the hose;
• and
• a first support helix to structurally support the wall, wherein:
• a first continuous bead of plastics material is extruded to have a first cross-section that defines a first lumen at a first location within the first cross-section;
• the first extruded bead is cooled sufficiently to cool the plastics material adjacent the first location lumen within the first cross-section to cause the first lumen to retain its size and shape within the first cross-section;
• the first extruded bead is re-heated sufficiently to cause outer surface portions of the plastics material of the first extruded bead to become molten;
• and
• the first extruded bead is helically wound onto and about an external surface of the wall.