Medical tubing
A medical tube has a tube wall, a first end and a second end. At least one heater wire is wrapped around the wall. Near or at one of the first end or the second end, there is at least one recess in an outer surface of the wall. The heater wire passes over the at least one tube recess such that the wire does not contact the wall in the area of the tube recess. Also disclosed are methods of making the tube and components used in making the tube.
1. A medical tube comprising:
a tube wall comprising a first end and a second end,
a heater wire wrapped around said tube wall, and
near or at one of said first end or said second end, a tube recess in an outer surface of said tube wall, wherein said tube recess extends parallel to an axis extending through said tube from said first end to said second end, and
said heater wire passes over said tube recess such that said heater wire does not contact said tube wall in the area of said tube recess.
2. A medical tube as claimed in claim 1 , wherein said tube wall further comprises helical corrugations with alternating crests and troughs,
said tube wall defines a helical track on said outer surface extending between said first end and said second end, and
said heater wire is located in said helical track.
3. A medical tube as claimed in claim 2 , wherein said helical track is associated with said crests.
4. A medical tube as claimed in claim 2 , wherein said helical track is associated with said troughs.
5. A medical tube as claimed in claim 1 further comprising an end connector on at least one of said first end and said second end.
6. A medical tube as claimed in claim 1 further comprising an insulation displacement connector located at least partially in said tube recess, wherein said insulation displacement connector is engaged on said heater wire.
7. A medical tube as claimed in claim 6 further comprising an end connector on at least one of said first end and said second end, wherein said end connector comprises a connector recess aligned with said tube recess.
8. A medical tube as claimed in claim 7 , wherein said insulation displacement connector is located at least partially in said connector recess.
9. A medical tube as claimed in claim 2 further comprising more than one heater wire and more than one helical track, wherein at least one of said more than one heater wire is located in each of said more than one helical track.
10. A medical tube as claimed in claim 9 further comprising an insulation displacement connector located at least partially in said tube recess, wherein said insulation displacement connector is engaged on at least two of said more than one heater wire.
11. A medical tube as claimed in claim 1 further comprising an outer sheath.
12. A medical tube as claimed in claim 11 , wherein said tube wall comprises helical corrugations with alternating crests and troughs and said sheath is supported on said crests.
13. A medical tube as claimed in claim 2 , wherein said tube wall further comprises a transition region near one of said first end or said second end in which said helical corrugations transition to semi-annular corrugations.
14. A medical tube as claimed in claim 13 , wherein said transition region and said semi-annular corrugations each define a track for said heater wire.
15. A medical tube as claimed in claim 14 further comprising a pinch feature in said track to capture and retain said heater wire in said track.
16. A medical tube as claimed claim 1 further comprising a locating feature near one of said first end or said second end, said locating feature extending radially away from said medical tube.
17. A medical tube as claimed in claim 16 , wherein said locating feature comprises an undercut to at least partially capture said heater wire.
18. A medical tube as claimed in claim 16 , wherein said locating feature is near a patient end of said medical tube.
19. A medical tube as claimed in claim 16 , wherein said locating feature is on said tube wall.
20. A medical tube as claimed in claim 16 further comprising an end connector, wherein said locating feature is on said end connector.
21. A medical tube as claimed in claim 6 further comprising a wire support member at one of said first end or said second end, said wire support member comprising
a ring shaped body comprising a wire support finger extending parallel with an axis of said ring shaped body, wherein
said wire support finger is located in said tube recess such that said wire support finger is between said outer surface and said heater wire and supports said heater wire in said tube recess away from said outer surface.
22. A medical tube as claimed in claim 21 , further comprising an insulation displacement connector located at least partially in said tube recess, wherein said insulation displacement connector is fitted over said wire support finger and engaged on said heater wire.
23. A medical tube as claimed in claim 21 , wherein said wire support member comprises a plurality of wire support fingers extending parallel with the axis of said ring shaped body and spaced around a perimeter of said wire support member.
24. A medical tube as claimed in claim 23 further comprising a plurality of tube recesses, wherein each of said plurality of wire support fingers is located in a respective one of said plurality of tube recesses.
25. A medical tube as claimed in claim 24 further comprising a plurality of insulation displacement connectors, wherein each of said plurality of insulation displacement connectors is located in a respective one of said plurality of tube recesses and fitted over a respective one of said plurality of wire support fingers.