Abstract: An apparatus and method for intraoperative internal placement of an afterloading catheter tube grid for post-operative radiotherapy using a semi-rigid tube having inserted within a plurality of catheters which extends outwardly from the distal end of the semi-rigid tube for a predetermined distance and attaching these distally outward extending catheter tubes to a soft sheet so that the catheter tube maintain a parallel position to one another over the predetermined distance. The proximal ends of these catheter tubes extend outwardly from the proximal end of the semi-rigid tube and are located on the outside of the body. These proximal ends of the catheters are left open for loading of the radioactive material into these catheter tubes, while the distal ends are closed to prevent airleak and to stop the radioactive material.

Abstract: A portable latching switch which has a switch body containing three cavities. An elongated cavity extends into the switch body for receiving an actuating member. The second and third cavities communicate with and extend transversely from the elongated cavity and contain latching members. An electrical switching member is responsive to movement of the latching member located in the second cavity. A locking member is contained in the third cavity whereby upon actuation of the electronic device a key is required for resetting of the latching member in the third cavity and subsequently of the actuating member.

Abstract: The subject invention is directed in general to a method of preparing an antigen using immunoabsorbent affinity chromotography particularly in cases where an antigen is used for the recognition and measurement of hypersensitivity and where antigenic specificity is desired as, for example, in hypersensitivity to tuberculin, histoplasmin, coccidioidin, and common inhalant allergens.