Patent ID: 7704245

Claim:
A sheath, comprising: a lubricious inner tube having a passageway extending longitudinally therethrough, said passageway having a substantially uniform inner diameter of from 16 to 30 French, said inner tube having a wall thickness between about 0.001 and 0.01 inch (0.025 and 0.25 mm); a coil having a plurality of coil turns extending longitudinally around a length of said inner tube, and a plurality of spacings between said turns, said spacings having a generally uniform width along said inner tube length; and an outer tube positioned longitudinally around said coil and said inner tube and bonded to said inner tube through said spacings between said turns, said outer tube having a durometer of about 30 to 60 on the Shore D hardness scale, and having a wall thickness between about 0.004 and 0.014 inch (0.10 and 0.36 mm).