| 主权项 |
1. An introducer sheath comprising:
a tubular body extending from a distal end to a proximal end, the tubular body defining a wall with a continuous, circumferential outer surface having a non-circular oblong transverse cross-section, the tubular body along its entire length comprising:
a lumen extending along the entire length of the tubular body from the distal end to the proximal end, the lumen having a cross-sectional area;a channel being disposed within the tubular body and configured to receive a guidewire, the channel extending along the entire length of the tubular body from the distal end to the proximal end, the channel having a cross-sectional area; andan expandable divider movable to increase the cross-sectional area of the lumen causing a decrease of the cross-sectional area of the channel, the expandable divider being movable from a pre-expanded state to an expanded state without elastically or plastically deforming at least a central portion of the expandable divider in the expanded state, the lumen having a cross-sectional area larger than in the pre-expanded state, the expandable divider being expandable from the pre-expanded state to an elastically-deformed state by elastically deforming, a cross-sectional area of the lumen in the elastically-deformed state being larger than in the expanded state;wherein an inner surface of a portion of the wall together with a surface of the expandable divider form a continuous, circumferential inner surface of the lumen in both the pre-expanded and expanded states, andwherein at least part of the expandable divider overlaps and abuts another part of the expandable divider in the pre-expanded state. |
