Abstract: A balloon catheter is provided for the implantation of a stent in a mammalian duct or cavity, comprising an elongate distal section and an expandable first balloon accommodating the section, further comprising means for the supply of a pressure medium for the expansion of the balloon, and means for heating the pressure medium, the catheter being provided with an elongate stent mounted onto the balloon. The catheter contains second means for establishing outwardly directed expansion of the stent at a sight or location selected from the two ends of the stent so that the stent will remain in position as implanted after removal of the catheter from the duct or cavity; and a method for the implantation of a stent in a human prostatic urethra.

Abstract: Device for carrying out heat treatment so-called hyperthermia, in a body cavity or duct comprising a catheter having an elongate front part (3) intended for insertion into said cavity or duct provided with a central tube (9) and a flexible and/or elastic balloon (7) surrounding said central tube in a liquid-tight manner, further comprising an axially operating first inlet (11) at the proximal end of the central tube and at least one outlet from the central tube intended for the supply of said medium under pressure to the balloon for the expansion thereof. The device is characterized in that said central tube (9) at its distal end extends at least up to the forward inner wall of the balloon to which it is fixed, said device in connection with the distal end of the central tube (9) being provided with a valve (33; 33') enabling discharge of gas from the interior of the balloon (7) through at least one gas outlet arranged at said distal end.

Abstract: An apparatus for effecting hyperthermia in a narrow body cavity or duct including: a disposable first part (1) having an elongate distal section (5) intended to be inserted into the cavity or duct having a centrally located, heat-releasing element (22), which is either surrounded by an elongate housing (24) or is itself constituted by an elongate housing, and a flexible and/or elastic enclosure (23) surrounding the housing in a liquid-tight manner, further including a device for supplying energy to the heat-releasing element (22) and an axially operating first inlet (135) at the proximal part of the housing, an outlet (133) from the housing being arranged for the supply of heat-transmitting medium under pressure for expansion of the flexible enclosure (23) to accommodate and to exert a controlled pressure on surrounding walls of the cavity or duct, a second inlet (131) to the housing (24), and medium-actuating device (13, 19) for the expansion of the flexible enclosure (23) and for internal circulation of the

Abstract: A device for transluminal extraction or implantation of a substantially tubular, radially expansible stent. The device includes a central tube surrounded by an exterior tube axially displaceable relative to the central tube and a plurality of axially extending gripping members coupled to the central tube at a distal end thereof. The gripping members are substantially evenly distributed around the periphery of the central tube and capable of outward expanding action of their distal ends when the central tube is displaced relative to the exterior tube. The gripping members are arranged in at least two concentric sets with a first set being radially displaced relative to a second set so as to substantially cover the gaps between adjacent gripping members of the first and second sets when in an expanded position. The sets of gripping members form a substantially closed distal end periphery when in the expanded position permitting a substantially continuous circumferential engagement around the stent.

Abstract: An apparatus for effecting hyperthermia in a narrow body cavity or duct including: a disposable first part (1) having an elongate distal section (5) intended to be inserted into the cavity or duct having a centrally located, heat-releasing element (22), which is either surrounded by an elongate housing (24) or is itself constituted by an elongate housing, and a flexible and/or elastic enclosure (23) surrounding the housing in a liquid-tight manner, further including a device for supplying energy to the heat-releasing element (22) and an axially operating first inlet (135) at the proximal part of the housing, an outlet (133) from the housing being arranged for the supply of heat-transmitting medium under pressure for expansion of the flexible enclosure (23) to accommodate and to exert a controlled pressure on surrounding walls of the cavity or duct, a second inlet (131) to the housing (24), and medium-actuating device (13, 19) for the expansion of the flexible enclosure (23) and for internal circulation of the