End structures may comprise single or double walled balloons, cups, discs or other structures known to those skilled in the art.FIG. 9B1-6 shows embodiments of cross section views of the introducer shaft lumen, which may be a single one lumen (1), dual lumen with a septum horizontally across the shaft (2), dual lumen with the septum vertically across the shaft (3), dual lumen with individual round