Disinfecting methods and apparatus

An assembly comprising:

• a polymeric body having walls that define a working lumen and a fiber lumen, the polymeric body having a first part in which the working lumen resides and a second part in which the fiber lumen resides, the first part having a first external shape and the second part having a second external shape that is different from the first shape, the polymeric body having an external profile defined by a perimeter of the first and second parts:
• and
• a clamp transitional between an open position and a closed position, in the closed position the clamp applies a force on the second part of the polymeric body to cause a deformation of the first part to cause a full or partial closure of the working lumen, the clamp having a proximal wall and a distal wall, at least one of the proximal and distal walls having a through opening that has an internal profile that is substantially similar to the external profile of the polymeric body, at least a portion of the polymeric body residing in the through opening so that the polymeric body is prevented from rotating in the clamp.