“…When difficult cannulation of the AVF is anticipated or established, various surgical strategies may be considered based on the patient's medical history, vascular state and more often the surgeon's experience and preference. Among these, superficialization/transposition of the arterialized vein or arteriovenous graft (AVG) represent the most common strategies, although surgical lipectomy [7] or liposuction [8] may also, though less frequently, be adopted. A recent review on this issue has been published including the presentation of a new, totally implantable device, i.e., the Venous Window Needle Guide (VWINGTM, Vital Access, Salt Lake City, UT, USA) which is especially designed for deep vessels, and is targetoriented to facilitate cannulation of the AVF by the so-called button-hole (BH) technique [9].…”