A mechanical cavity-creation surgical device and methods and kits for using such devices is described. A single, non-volatile programmable transistor having a drain coupled to one of the first node and second node, a source coupled to the other of the first node and second node, gate coupled to an energizing conductor, the data storage structure constitute the programmable switch. The user equipment transmits a first message in a first scheduled transmission in a random access procedure during setup of the communication link. A method for a performing an operative procedure on a target tissue in a subject using the endoscopic knife assembly having a low-profile blade with an upper cutting surface and a lower cutting surface is also described.