| 摘要 |
A catheter sheath (12) includes a tubular member (14) of a settable material defining a lumen (18), a distal region of the tubular member being crenelated to define a plurality of discrete elements (28). The discrete elements are displaceable between a first position in which the discrete elements extend parallel to a longitudinal axis of the tubular member and a second position in which the discrete elements project outwardly transverse to the longitudinal axis of the tubular member. A plurality of electrical conductors (30) is associated with the tubular member, the conductors projecting into the distal region of the tubular member. A sleeve is mounted about the tubular member, the sleeve and the tubular member being displaceable axially with respect to each other for effecting displacement of the discrete elements between their first and second positions. At least one electrode (36) is carried by at least one of the discrete elements, the at least one electrode being in an operative position when the discrete elements are in their second position.
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