Abstract: A manual control device for laparoscopic patient treatment by use of electrical curetage or coagulation, with means for clearing the surgical sight by irrigation or suction, finger operated buttons controlling the various functions, and an interlock mechanism disabling the electrical functions when a push button is depressed to enable irrigation or suction.

Abstract: A trocar assembly includes an elongate trocar device and a surrounding cannula. The trocar device incorporates an electrosurgical cutting element which is used to make a guide hole for the cannula and thus enables the remainder of the trocar assembly to enlarge the puncture. The cutting element comprises a bi-polar electrode assembly. An electronic control circuit senses the current flow to the cutting element and, when the trocar device breaks through the wall of the body cavity being cut into, this circuit cuts off the connection to the associated electrosurgical generator. Further control circuitry prevents a surgeon from resuming electrosurgery until a predetermined time period has elapsed. Multiple trocars of different diameters are provided for the same assembly.

Abstract: An improved coplanar transmission structure has a coplanar transmission line formed on one surface of a substrate and a lossy resistive material formed on the opposite surface of the substrate for suppressing spurious electromagnetic modes propagating through the substrate. The lossy resistive material may be nichrome or the like and is patterned on the substrate using thin or thick film processing.

Abstract: The present invention is directed to a self-contained, totally disposable apparatus for the collection and reinfusion of blood which is suitable for use with a chest drainage unit to provide for the autotranfusion of autologous blood and the method of using the apparatus. The blood collection and reinfusion apparatus is separate in structure from the chest drainage unit and comprises a rigid outer container and an inner flexible container in conjunction with portals for blood collection, reinfusion, and attachment to a vacuum source. The apparatus and method of the invention provides a closed system, requires minimal handling of the blood, and provides for greater patient safety in that no interruption of the operation of the chest drainage unit is required.

Abstract: The present invention is directed to a self-contained, totally disposable apparatus for the collection and reinfusion of blood which is suitable for use with a chest drainage unit to provide for the autotransfusion of autologous blood and the method of suing the apparatus. The blood collection and reinfusion apparatus is separate in structure from the chest drainage unit and comprises a rigid outer container and an inner flexible container in conjunction with portals for blood collection, reinfusion, and attachment to a vacuum source. The apparatus and method of the invention provides a closed system, requires minimal handling of the blood, and provides for greater patient safety in that no interruption of the operation of the chest drainage unit is required.

Abstract: This disclosure relates to an improved furnace process for producing carbon blacks by the incomplete combustion of hydrocarbonaceous feedstock wherein the resultant blacks either have higher surface areas than the carbon blacks normally prepared from the feedstocks or are produced more economically. The blacks produced by the process are suitable for use in all of the typical applications such as rubber plastics, inks and the like.

Abstract: Disclosed herein are carbon black-containing asphalt compositions having improved properties of resistance to thermal and actinic oxidation.

Abstract: An electrical connector is provided for an electrode having a headed stud thereon in which a slot is provided between electrical contact plates mounted on the connector. The headed stud of the electrode fits within this slot and a slidable locking bar having a cam surface thereon is moved to a locking position wherein the headed stud is forced into a narrowed portion of the slot and is locked in contact with the electrical contact means.

Abstract: A disposable skin conducting electrode assembly and electrode therefor for use on a patient wherein the electrode assembly comprises an electrolyte pad, an electrode and an adhesive pad. In one embodiment of the invention the electrode is a thin stainless steel plate having a periphery shaped to provide a plurality of recesses in the contour thereof and the adhesive pad is a solid sheet having greater overall length and width dimensions than the electrode. Thus the adhesive pad extends over the recesses in the periphery of the electrode and provides greater adhesive area for adhering the electrode assembly to the skin of the patient. An external conductor is connectable to a conductive, single piece, solid metal stud or post attached to the electrode extending through an orifice in the adhesive pad. A pair of washers are mounted on the stud on either side of the adhesive pad for mechanically retaining the stud and electrode in position.