Abstract: A medical endoscope (1) fitted with an optics duct (4) receiving an optical system (9, 10) enclosed by a system tube (6), the distal end of the optics duct (4) being closed by a window (5) to the inner surface of which is mounted an electrical heater (11), characterized in that the heating ring (11) rests against the inner surface of the window (5) while being pressed in that direction by a spring (13).

Abstract: A surgical exploratory testing system (8, 11) to select a laparoscopic trocar's puncture site (5, 6, 7) through the abdominal wall (1) is characterized in that said system is designed as a coil unit (9) which can be placed on the puncture site (5, 6, 7) and which is connected to an eddy current detector (11).

Abstract: A surgical, vascular coagulation forceps (1) comprising two mutually displaceable jaws (3, 4) bearing flat electrodes (12, 13) connected to different terminals of an hf source (16), or one of said jaws being fitted with an ultrasonic oscillator, characterized in that a coil unit (18) connected to an eddy current sensor (20) is mounted on at least one of the jaws (3, 4).

Abstract: A rigid video endoscope, fitted with a tube unit (1) comprising a metallic outer tube (2, 2?) sealed off distally by a window (3) and a metallic inner tube (4, 4?) which supports a video camera (5) and an objective (6) in its distal end segment (4), said tube unit being fitted with a proximal terminal part (12) wherein the proximal end segment (4?) of the inner tube (4, 4?) is sealed off by a glass fusion element (7) that is traversed by fusion-imbedded metal contact pins (8) of which the inward ends are connected by conductors (10) to contact pins (9) of the video camera (5) and wherein the proximal end segment (2?) of the outer tube (2, 2?) is hermetically connected to the proximal end segment (4?) of the inner tube (4, 4?), the outer tube (2, 2?) being electrically insulated at least at its distal end segment (2) from the inner tube (2, 2?), is characterized in that the proximal end segments (2?, 4?) of the two tubes (2, 2?; 4, 4?) are connected in the terminal part (12) by means of an annular glass fusion

Abstract: A fluorescence endoscope to view human organs exhibiting zones marked by fluorescence, the endoscope including a light conduit, a lamp, a short pass filter controlled by a timer so as to be selectively movable into and out of the light path between the lamp and the light conduit, a video camera system viewing the image through a stationary long pass filter, and a video-processing unit connected in series with the video camera system. The video processing unit is controlled by the timer and timed to generate time-separate normal and fluorescence images. The video camera system includes a video camera having a frame frequency that is synchronized with the timer. The video processing unit separately processes and prepares the fluorescence images taken when the short pass filter is inserted into the light beam path and the normal images taken when the short pass filter is retracted out of the light beam path, and displays the fluorescence and normal images in congruent superposition on a display.