Laser treatment heads the ball into the goal an elongated applicator to access the shape of body cavity. End applicator is deflector by window. One driver of at least proximal end applicator can move axially and applicator is in spiral pattern, so that laser beam pulses deflect into mucosal areas application along the wall cavity of spiral path. The transmission device includes rotatable sleeve in static hollow shaft. The axis has a helical channel, in the wall that there is a longitudinal slot to pass through it for its outer surface and sleeve. Pin connection extends through the slot in the proximal end of applicator and enters the channel. Work as sleeve rotating, slot advance payment pin is moved along channel, by the spiral pattern of the giver of installation.
