Whereas OTW systems can be placed over-the-wire, TTS (through-the-Scope) colonic stents can be delivered though the working channel of the colonoscope, resulting in application time being reduced dramatically. Due to the visible endoscopic control during placement, stent deployment takes place in a controlled manner. In comparison with OTW colonic and rectal stents, TTS applications are flexible and better suited for the curved segments of the colon, e.g. the right and left colonic flexures.
As a standard among TTS colonic stents, you can choose from four different lengths: 60, 80, 100, and 120 mm for stents without covering. In all other versions the stent end working diameter measures between 25mm and 30mm. The introducer system for Micro-Tech (U.K.) Ltd TTS colonic stents has a diameter of 10 Fr. (= 3.3mm), meaning it fits to all working channels with a diameter of at least 3.6mm.