Patent ID: 6899708

Claim:
A sterile tissue access and treatment system comprising a distally open small-diameter light energy transparent elongated tube ( 4 ) formed of a non-ferromagnetic, heat-resistant material and having a proximally mounted handle piece ( 6 ), with an infusion fitting ( 9 ) for supplying an infusion medium, and with a through channel ( 7 ) that is in axial alignment with the elongated tube ( 4 ) and into which an adjustable seal ( 8 ) is integrated, and a mandrin ( 1 ) for tissue access fitted into the elongated tube ( 4 ) and distally projecting from it, said mandrin being replaceable by an energy guide ( 16 ) for tissue treatment, an annular flow channel being formed between said energy guide ( 16 ) and the elongated tube for unidirectional flow of a medium that cools the energy guide and that is discharged into the tissue after being heated by the energy guide, and the distal end of said energy guide ( 16 ) ending inside said elongated tube.