Abstract: A sterile bag for containing non-sterile objects includes: a body; a sealed first end; a second end forming a cuff and an opening to an internal portion of the bag when in a first position; a visible demarcation located circumferentially along the cuff dividing the bag into two sides; a closure mechanism located along the cuff on the proximal side of the visible demarcation such that when the second end is in a second position there is no cuff and the closure mechanism can be used to seal the bag with the visible demarcation sealed within the bag. In use, a first user with scrubbed hands may touch the bag only on one side of the visible demarcation and a second user with non-scrubbed hands may touch the bag only on the other side of the visible demarcation.

Abstract: Disclosed is a method for non-invasively detecting narrowing in a lumen in the body. This is done using sonic signals, e.g. ultrasound, that are directed through the wall and into the lumen of the tube, such that they travel axially and backscatter is returned and read. This method can be used in a number of applications including both naturally-occurring vessels and artificial catheters.

Abstract: A sterile bag for containing non-sterile objects includes: a body; a sealed first end; a second end forming a cuff and an opening to an internal portion of the bag when in a first position; a visible demarcation located circumferentially along the cuff dividing the bag into two sides; a closure mechanism located along the cuff on the proximal side of the visible demarcation such that when the second end is in a second position there is no cuff and the closure mechanism can be used to seal the bag with the visible demarcation sealed within the bag. In use, a first user with scrubbed hands may touch the bag only on one side of the visible demarcation and a second user with non-scrubbed hands may touch the bag only on the other side of the visible demarcation.

Abstract: A sterile bag for containing non-sterile objects includes: a body; a sealed first end; a second end forming a cuff and an opening to an internal portion of the bag when in a first position; a visible demarcation located circumferentially along the cuff dividing the bag into two sides; a closure mechanism located along the cuff on the proximal side of the visible demarcation such that when the second end is in a second position there is no cuff and the closure mechanism can be used to seal the bag with the visible demarcation sealed within the bag. In use, a first user with scrubbed hands may touch the bag only on one side of the visible demarcation and a second user with non-scrubbed hands may touch the bag only on the other side of the visible demarcation.