Abstract: A three-dimensional vision endoscopic apparatus according to the present invention comprises a pair of optical systems for transmitting an image of a subject as two subject images having a parallax between them, a pair of imaging devices for picking up subject images transmitted by the optical systems, at least one visual field mask, a display unit for displaying the two subject images alternately or concurrently, an adjusting mechanism for adjusting the position of one or both of the imaging devices so that the display images will become consistent on the screen of the display unit, and an adjusting mechanism for adjusting the relative position of the visual field mask.

Abstract: A surgical instrument for treatment in the body cavity, in which an open-close member for treatment is rockably mounted by of a pivot pin on the distal end portion of a sheath to be inserted into the body cavity, and is connected to the distal end of a rod passed through the sheath, by a cam mechanism including a cam groove and a cam pin in engagement therewith. As the rod is moved by an operating handle, the cam mechanism is activated to open and close the open-close member for treatment. The component members of the cam mechanism have external shapes such that those portions on the proximal end side of the position near the pivot pin do not project from the sheath in every operating state.

Abstract: An ultrasonic aspirator has a probe having the inside path made an aspirating path by being provided on the base side with an ultrasonic vibrator. The probe is used as an ultrasonic vibration transmitting member and is in contact at the tip with an object within a body cavity to crush the object and to discharge the crushed object out of the probe through the aspirating path. A device, for detecting a break of the probe, is provided so that, when the probe breaks, the vibration of the above mentioned ultrasonic vibrator will be stopped by a signal from the detecting device.

Abstract: A cerebral surgery endoscope apparatus comprises a stereotaxic instrument secured to the head of a patient and adapted to effect positioning of an affected part; an adjusted support means whose inserting direction is determined by its orientation to the stereotaxic instrument and which determines the direction in which a treating instrument is inserted into the head of the patient; a viewing device such as an endoscope supported on the support means and having a channel into which a treating instrument can be inserted, the treating instrument being inserted into a channel of the viewing device and then into the head of the patient. A fixing device is connected to the stereotaxic instrument and adapted to secure the support means, the viewing device and/or the treating instrument in a fixed position on with respect to the affected part.

Abstract: The radioactive ray detecting therapeutic apparatus of the present invention has an insertable part to be inserted toward an affected part. A therapeutic apparatus for treating the affected part, and a radioactive ray detecting apparatus for detecting radioactive rays discharged out of the affected part and providing signals by which to direct the therapeutic apparatus to the affected part, are provided in the tip part of the insertable part.

Abstract: A radioactive ray detecting endoscope comprises an elongated insertable part, an ultrasonic imaging apparatus provided in the tip part of the insertable part for transmitting ultrasonic waves toward an observed part, for receiving echoes from the observed part by these ultrasonic waves, and for outputting a signal for forming an ultrasonic image and a radioactive ray detecting apparatus arrangeable in the tip part of the insertable part for detecting radioactive rays. Preferably, the observing direction of the ultrasonic imaging apparatus and the detecting direction of the radioactive ray detecting apparatus substantially coincide with each other.

Abstract: A hard endoscope of oblique view type which provides equal illumination of the range of visibility of the objective optical system. The endoscope has an exterior tubular member with an interior housing member disposed eccentrically within the tubular member and carrying an inspection optical system, with the distal end of the endoscope terminating in an oblique planar surface. Illuminating means are carried between the housing member and the exterior tubular member. In the region of the oblique planar surface, the interior of the tubular member and the exterior of the housing member define a passage for the illuminating means having a generally crescent-shap, or, preferably, two cylindrical surfaces in which the illuminating means are carried to transmit light from the oblique planar surface that will transmit light to produce the image of the illumated object, so that it may be clearly seen by the inspection optical system.

Abstract: This endoscope is provided within an endoscope body having an elongate insertion part having an observing window at the tip and an operating part provided as connected to the rear end of this insertion part with an observing optical system transmitting an observed image from the tip of the above mentioned insertion part to the above mentioned operating part and is provided with a first airtightening device for making the above mentioned endoscope body airtight in the structure and a second airtightening device for making at least a part of the above mentioned observing optical system airtight in the structure or is provided within the above mentioned endoscope body with a hygroscopic member formed of a flexible sheet-shaped hygroscopic material.

Abstract: A hard endoscope is disclosed having a hard outer tube, an inner tube disposed eccentrically within the outer tube, such that a gap is left between the two tubes, the inner tube having an observing optical system disposed therein, a plurality of light guide fibers disposed within the gap, the light guide fibers being adapted to transmit light along the length thereof and an end surface formed by the termination of the outer tube, the inner tube, and the light guide fibers. The outer tube has a tip member disposed on the end thereof, the tip member having an opening and forming a curved inner peripheral surface. The inner tube has a tip member disposed on the end thereof, the tip member having a curved outer peripheral surface and a slit for receiving reflected light, and the inner tube tip member terminating at the above-mentioned opening. The outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube are curved in generally the same direction.