Abstract: A balloon catheter comprises a catheter shaft, and first and second balloons carried on the catheter shaft with the second balloon positioned to at least partly overlie and sealingly enclose the first balloon. A lumen is defined by the catheter shaft to communicate between a space located within the first balloon and a proximal end portion of the catheter shaft. The first and second balloons each define holes of a size to permit medication delivered through the lumen to pass outwardly through the perforations of both the first and second balloons. By such an arrangement, medication may be directly delivered over a wide area to tissue without tissue damage.

Abstract: A multiple lumen, intravenous catheter for hemodialysis or the like defines a distal end portion in which at least a pair of the catheter lumens each communicates with the exterior through aperture means. By this invention the aperture means of one of the lumens defines a first port at essentially the distal catheter end, and the aperture means of the other of the lumens defines a second port spaced proximally along the catheter from the distal end and first port. The second port is positioned to face radially inwardly to at least a slight degree to avoid engagement of the wall of the blood vessel that the catheter occupies. Additionally, the tip of the catheter distal of the second port is preferably of substantially helically shape, being sized to assist in keeping the second port away from the blood vessel wall. As another feature, the catheter may be angled in its as-manufactured, unstressed condition to avoid pressing by elastic memory against internal blood vessel walls.

Abstract: An implantable cardiac deibrillator is provided having a battery, capacitive means, means coupled to the battery for charging the capacitive means, and means for coupling the capacitive means to a patient's heart, for delivering a high voltage shock to the heart. Current leakage from the capacitive means is detected. If the current leakage exceeds a predetermined amount, charging of the capacitive means is terminated. In one embodiment, voltage at the patient is directly sensed. In another embodiment, the voltage across a resistance located in series with the patient is sensed. In another embodiment, a test charge is provided for a short interval. The capacitive means is sensed to determine excessive loss of energy after the test charge. If excessive loss of energy is determined, charging is terminated.

Abstract: A wire gripping handle for attaching to and detaching from wires defines a first tubular member, and a second tubular member which receives the first tubular member in generally coaxial relation. Both tubular members define a longitudinal slot so that, when the slots are aligned, a wire may be placed into the bores of the joined tubular members in lateral fashion. Then, upon relative rotation of the tubular members, a portion of one of them may be radially collapsed into gripping relation with the wire.

Abstract: A dental model of teeth mounted in a jaw comprises an artificial jaw member defining tooth-receiving sockets. The teeth have roots, the roots being removably seated in the sockets and bonded there by elastomeric adhesive, whereby the teeth exhibit a resiliently seated characteristic similar to that of the natural teeth in a human jaw. Also, a preformed, artificial gingiva may be applied which exhibits improved, lifelike characteristics for a practice experience that is closer to clinical reality.

Abstract: A method of applying a multicolor finish to an elongated channel member, particularly a ball channel for a pinball machine. A first fusible color coating is applied to a first portion of the channel member. A second fusible color coating is applied to a second portion of the channel member, while also applying the second color coating to a part of the first portion. The part of the first portion is adjacent the second portion, and the first and second color coatings are of different colors. Upon fusion of the color coatings the part of the first portion of the channel member assumes a third color that is a blend of the first and second colors, to provide a pleasing ball channel of at least three colors.

Abstract: A portable antenna including a housing, a radiator having its proximal end located within the housing and its distal end located outside of the housing, an electrical cable connected to the housing, and a support member coupled to the housing. The support member extends generally in the opposite direction of the radiator and has a portion for insertion and retention between the side window and door frame of a motor vehicle.

Abstract: An implantable cardiac defibrillator employing a switched capacitor stage wherein the switches are clocked in a non-50%/50% ratio such that an operational amplifier has greater than 50% of the clock period to acquire the desired voltage and less than 50% of the clock period to hold the acquired voltage, thereby allowing the circuit to run at an overall lower current drain.

Abstract: Ozonated water may desirably have the concentration of oxygen present reduced by agitating the water at less than atmospheric pressure to remove dissolved gases. Substantially more oxygen may be removed from the water than ozone by this technique, to provide a product water which has advantages of use in electronic manufacturing operations.

Abstract: A cardiac pacer is provided which incorporates a sensor responsive to the physical activity of the pacer-wearing patient. The output of the physical activity sensor is utilized by control circuitry of a physiological sensor to enable the physiological sensor to monitor a selected physiological parameter only if the physical activity of the pacer-wearing patient exceeds a selected threshold. In this manner, the electrical energy requirements of the pacer are lessened.