Abstract: A head phone comprises at least one loudspeaker of the type that rests on the outside of a user's ears, mounted on and held in place by a support. The loud speakers are equipped with a sound-concentrating duct that may be pivotable relative to the auditory canal of a user's ear so as to facilitate insertion of the duct a short distance into the auditory canal.

Abstract: A transducer for emitting and picking up mechanical vibrations includes a center body (4) suspended in a piezo-electric and elastic suspension structure (3) in a surrounding framework (2). The suspension structure (3) is formed in sectors, and has separate signal wires for each respective sector (5) so that vibrations can be emitted and received at the same time with different sectors (5). In addition, the center body (4) can be equipped with piezo-elements of its own.

Abstract: A mechano/electrical sensor senses force or vibration and delivers at least one electrical signal that is a function of the sensed force or vibration. The sensor has at least one inner body supported by at least one piece of electric support structure that, in turn, is suspended in a surrounding framework. Signal leads are provided from opposite lead polarizable sides of the at least one support structure.

Abstract: An electronic stethoscope including a microphone, amplifying equipment, and a loudspeaker for the user, also comprises an adjustable filter circuit. The filter circuit has a bandpass effect, and the center frequency and bandwidth of the passband can be adjusted at will throughout the audible range by the user.

Abstract: An erection aid comprises an elastic device adapted to be placed around at least a part of a penis, which device is in the form of a condom (1) or a tightening ring (10). The device is equipped with a piezoelectric unit (3), for example a piezoelectric foil, for emission of stimulating vibrations. The device is self-supplied with a battery (7) and an electronic miniature circuit (4) for activation of the piezo-unit (3).

Abstract: The pick-up head (1) with an acousto-electrical transducer (4) for converting sound vibrations to electrical signals, comprises as characterizing features a sound influencing bell (2) arranged around a slender peg (3) bonded directly to the transducer (4), and the sound influencing bell (2) delimits a listening area on a body surface and influences to a predetermined degree and in a predetermined manner, by means of internal reflection and/or absorption, the direct sound picked up by the slender center peg (3). The bell (2) is acoustically decoupled from the center peg (3).

Abstract: A multi-function arthroscope has a laser channel, an irrigation tube, a suction tube, a rod lens, and optical fibers housed within a tubular casing. The operation site is illuminated by the optical fibers, and the physician views the illuminated site through the rod lens, performs laser surgery with laser radiation propagated by the laser channel, irrigates the site and cleans the rod lens with saline solution through the irrigation tube, and vacuums the debris with the suction tube, all in a single insertion of the arthroscope through a dilator tube. The respective distal ends of the optical fibers, rod lens, laser channel, irrigation tube, and the suction tube are positioned in different planes so that the suction tube extends in a distal direction further than the laser channel, the laser channel extends further than the irrigation tube, and the irrigation tube extends further than the rod lens.

Abstract: Arthroscopic cervical discectomy instruments include a push knob for a guide wire, a pair of telescopically mounted dilator tubes, one of which includes a water port so that the tube provides the additional function of an irrigation tube, a ligament cutter, a continuous suction punch, a cervical osteotone, a cervical cureet, a nucleus extractor and a cureet nucleus extractor. The dilator tubes, the ligament cutter, and the continuous suction punch are all centrally bored to receive the guide wire. All of the instruments are of arthroscopic proportions and each instrument, exclusive of its handle, is slidably insertable through the bore of the largest in diameter dilator tube. The largest in diameter dilator tube serves as a dilator, an irrigation tube, and as the main sheath through which the other tools are inserted.

Abstract: A method and device is described for removing concretions such as calculus stones within human ducts such as the ureter or kidney. The device includes a flexible probe insertable through the human duct so that a tip thereof is juxtaposed against the concretion. The probe includes a positive electrode extending coaxially within the conduit and embedded in a solid electrically insulative material. A negative electrode is coextensive with and outwardly encircles the positive electrode. The solid electrically insulative material stops short by a distance R from the end of the probe, thereby leaving a recess without solid insulation between negative and positive electrodes at the tip end of the probe. The recess achieves a more efficient fragmentation of target calculi at lower energy, with less human tissue damage and increase in useful probe life.

Abstract: An arthroscopic method for debulking tissue and a kit of arthroscopic tools for performing the steps of the method. A protruding piece of tissue that is bearing against a nerve is undermined by the formation of a cavity beneath it, and the cavity is collapsed by heat generated by a laser. When the cavity collapses, the protruding tissue falls into it and separates from the nerve. The kit includes plural dilator tubes that are used to progressively dilate the arthroscopic incision and plural cutter tubes that are used in sequence to cut larger and larger pieces of tissue. Plural forceps are employed to remove the cut tissue to form the cavity, and impactor members in the kit are used to compact the bone that surrounds the cavity just before the laser is introduced into the cavity to collapse it.

Abstract: A tool that is retrofit to a conventional arthroscope to add multiple functions. The tool includes a sheath that receives the elongate tube of the arthroscope, and a lock that detachably secures the tool to the arthroscope. A hollow base member is mounted to the sheath, and a first opening formed in the sheath provides fluid communication between the hollow interior of the base member and the sheath. An irrigation control valve is mounted to the base member and supplies irrigation fluid to the site of the surgical procedure through an elongate flexible needle that extends from the irrigation control valve to the distal end of the sheath. A suction control valve has an inlet in communication with a source of negative pressure and vacuums irrigation fluid and surgical debris from the site. A laser tube intersects the sheath at a second opening at an angle and delivers coherent light to the site. Thus, the tool adds a total of three functions to the arthroscope.

Abstract: The invention contemplates an ultrasonic body treatment system wherein a body applicator is self-contained unit with its own radio-frequency oscillator/driver, factory-pretuned to its own transducer. A remote-control unit supplies control signals via optical coupling to the oscillator-driver of the body-applicator unit. Another optical coupling from the body-applicator unit to the remote-control unit enables fidelity of applicator performance to be monitored at the remote-control unit. A safety interlock at the body-applicator unit precludes transducer operation in the absence of adequate coupling to a patient's body. The remote-control unit can thus provide all supervisory and control functions for the body-applicator unit without any electrical interconnection between these units.