Abstract: In an ultrasonic handpiece with irrigation an aspiration passages, an opening is made between the aspirating passage and the irrigating passage so as to remove bubbles from the operating site so that the surgeon's vision will not be obstructed.

Abstract: A baffle with holes formed therein is mounted in a sleeve which surrounds the needle of an ultrasonic handpiece so as to reduce bubbles in the irrigation fluid supplied to the handpiece and thus improve the visibility at the operating site. As irrigation fluid is supplied to the handpiece, it contacts the ultrasonic motor which tends to cause bubbles and by providing the baffle with openings, the bubbles are restricted from passing the baffle and obstructing the vision of the surgeon using the ultrasonic handpiece.

Abstract: A vented ultrasonic transducer for a medical handpiece which is provided with a number of vents which extend from the interior mounted crystal drive motor to the rear end of the handpiece so as to allow the handpiece to be rapidly sterilized with a flash autoclave and the vent tubes allow moisture to pass in and out of the handpiece and prevent moisture from remaining in the handpiece and shorting out the crystal electrical drive after sterilization has been completed.

Abstract: An improved ultrasonic lithotriptor probe for performing fragmentation and removal of calculi deposits in the kidney and upper ureter wherein high frequency sound waves are utilized to disintegrate the calculi or stones based on placing the probe against the stones and causing them to disintegrate due to the ultrasonic energy. The probe is coupled to a transducer which drives it and the probe is hollow and aspiration is utilized to remove the particles of the stone through the probe. The probe extends into the transducer which prevents the probe from clogging. Also, the end of the probe which engages the stone is provided with a slit so as to prevent it from being clogged by the stone so as to cause the aspiration to be interrupted when the end of the probe extends into the confines of the stone in that the split will allow liquid to pass through the probe and continue to cool it and to remove fragments through the probe.

Abstract: An improved peristaltic pump which provides for rotating the head an offset angle relative to the rotor center and which includes a pivoted housing structure that can be adjusted by a spring loaded set screw so as to vary the quantity of material pump. By adjusting the set screw, the spacing between the head and the rotor can be adjusted to vary the volume of the pump. A one-way clutch assures that fluid cannot be supplied in a reversed direction through the pump.

Abstract: Apparatus and method for applying aspiration, irrigation, medication and ultrasonic power and dwell time to biotissue for surgery and treatment wherein the pressure for both aspirating and irrigating is precisely and accurately maintained by the use of a differential valve and a control reservoir which is generally much larger than the biotissue cavity to be operated on and wherein the pressures for irrigation, aspiration, medication and the application of the amplitude and dwell time of ultrasonic energy can be precisely controlled, externally, to the patient.

Abstract: Apparatus and method for applying aspiration, irrigation, medication and ultrasonic power and dwell time to biotissue for surgery and treatment wherein the pressure for both aspirating and irrigating is precisely and accurately maintained by the use of a differential valve and a control reservoir which is generally much larger than the biotissue cavity to be operated on and wherein the pressures for irrigation, apiration, medication and the application of the amplitude and dwell time of ultrasonic energy can be precisely controlled, externally, to the patient.

Abstract: Apparatus and method for measuring and indicating the true power in watts supplied to an ultrasonic handpiece and also to indicate the accumulative power applied to the handpiece.

Abstract: A machine for performing surgery and treatment utilizing ultrasonic energy wherein so as to obtain precise control of the operating frequency and eliminate unnecessary heating and loss of power the hand tool as well as the generator and power supply are designed after establishing the designed criteria of the particular medical tool required thus allowing coupling of energy into the tool in a very efficient manner. Means are also provided for assuring that dangerous transverse modes of the instrument used will not occur which can cause injury to patients. Several unique additional safety and construction features are also shown.