Catheter
AssigneeTerumo Kabushiki Kaisha
InventorsSusumu Tanabe, Masahiro Nudeshima
Life of this patent
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Abstract
A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, which comprises at least one radio opaque ring member provided on the circumference of the catheter, for indicating the direction of the end portion. The radio opaque ring member has an outer diameter approximately equal to that of the catheter, and a width (or a length along the axial direction of the catheter) L which satisfies the following relationship with the magnitude of the inner diameter D of the ring members: L.ltoreq.Dtan(.pi./8).
Claims10
A catheter having one of a curved distal end portion and a flexible distal end portion able to bend when being used, comprising at least one radio opaque ring member circumferentially formed on said catheter, so as to cross an axial direction of said catheter, said radio opaque ring member satisfying the condition:
- L.ltoreq.Dtan (.pi./8)
- where D is the inner diameter of said radio opaque ring member and L is the length thereof along the axial direction of said catheter, said radio opaque ring member being provided with a slit-shaped portion having substantially no radio opaque function and extending along the axial direction of said catheter whereby said radio opaque ring member with it's slit-shaped portion enables determination of the inclining direction of said catheter.
Dependencies are inferred from the claim text.