Tissue resecting instrument

An end effector assembly of a tissue-resecting device, the end effector assembly comprising:

• an outer shaft defining a proximal end portion and a distal end portion, the distal end portion of the outer shaft defining a window therethrough;
• a drive wire extending through the outer shaft and including a cylindrical body and a distal end portion defining a semi-cylindrical configuration including a semi-cylindrical bottom surface and a planar upper surface, wherein a semi-cylindrical cut-out is defined within the planar upper surface;
• and
• a distal cutting tip disposed within the outer shaft and at least partially overlapping the window, the distal cutting tip defining a semi-cylindrical lumen defined by a semi-cylindrical bottom surface and an open top,
• wherein the distal end portion of the drive wire is at least partially received within the semi-cylindrical lumen of the distal cutting tip and engaged therein with the semi-cylindrical bottom surface of the distal end portion of the drive wire substantially mating with the semi-cylindrical bottom surface of the distal cutting tip, the drive wire configured to drive rotation or oscillation of the distal cutting tip relative to the outer shaft.