Pleated Bag for Interventional Pullback Systems

A method of providing a sterile field for an intravascular procedure, comprising:

• providing an elongate bag having a distal end, a proximal end, and a chamber extending therebetween, the chamber sized to contain a catheter pullback device having a motor drive and a sled, the motor drive being translatable along a longitudinal axis of the sled during use, wherein the elongate bag further comprises:
• an upper sheet and a lower sheet, the lower sheet defining a plane;
• a plurality of pleats integrated near the distal end of the bag, the plurality of pleats being a series of folds only in the upper sheet near the distal end of the bag, each fold of the series of folds in the upper sheet laying in a plane that is generally parallel to the plane defined by the lower sheet, the plurality of pleats being expandable to facilitate expansion of the elongate bag to accommodate translation of the motor drive along the sled;
• and
• an orifice located proximally to the pleats and sized to allow passage of at least a portion of a catheter into the chamber of the bag in a direction parallel to the longitudinal axis;
• and
• positioning a catheter pullback device within the chamber of the elongate bag such that plane defined by the lower sheet extends parallel to the longitudinal axis.