| 摘要 |
A flexible instrument introducer has a central channel and several peripheral channels in its outer wall for passage of instruments and other devices. It is assembled from three or more cylindrical elements, snapped together to give a limited degree of bending at each joint. The bending is confined to one or a few planes. The tube formed from the cylinders is stabilized and sealed by a flexible tube surrounding it, and said flexible tube confines controls and devices placed in the peripheral channels. The flexible tube also permits the maintenance of sterility and/or application of vacuum in the central and peripheral channels. The introducer may have an adaptor which keeps the distance from the proximal end to a device constant while the overall introducer bends. |
