GB661997A - Improvements in or relating to endoscopic instruments - Google Patents

Abstract

661,997. Endoscopes. AMERICAN CYSTOSCOPE MAKERS, Inc. May 6, 1949 [May 11, 1948], No. 12149/49. Class 81 (ii). In an endoscope in which an electrode rod adapted to be connected to a source of electric current is movable within a tube, means are connected to the electrode rod and are adapted to be connected to the electrical supply for simultaneously imparting movement to the rod and controlling electrical energization thereof. As shown a movable electrode rod 50 provided at its further end with an operating electrode 54, together with a surgical telescope 35, is mounted within an endoscopic sheath 10 of an electrical insulating material. The sheath has a fenestra 11 at its distal end whilst its rear end is located within a collar 12 containing a passage 13 and inlet conduit 15 for the transmission of an irrigating liquid into the interior of the sheath. A body portion 20 is inserted into the tapered passage 14 in the collar 12 the portion being clamped by a locking unit and handle 16, 17, which also clamps parallel tubes 22, 23, accommodating the telescope stem 36 and electrode rod 50 respectively. A rack 24 is secured to one end of the body 20 a pinion 56 within a housing 55 engaging therewith to effect longitudinal movement of the rod 50 which, with the exception of its ends, is encased within an insulating material 51. The bare end 52 of the rod is connected to an electrical supply unit by a plug 94 and electrically conductive core 92 inserted in an insulating block 90 carried by the housing 55. Rotation of the pinion 56 is by rotative movement of a rod 62 to which is attached an arm 63. Rotatably mounted on the arm is a combined handle and switch unit 65 comprising spring-loaded press buttons 80, 81 for controlling the " cutting " and " coagulating currents " supplied to the rod 50. Attached to the end of the rack 24 remote from the body 20 is an arm 26 to the top of which is secured a bracket arm 45 mounting a terminal post 44 for connection between an electrical supply and a lamp 40 provided at the forward end of the telescope stem 36. Sighting through the telescope is by the eyepiece 41 whilst the control unit 65 is connected to the electrical supply unit by a three core cable 83 and plug 87. A diagram of connections of the supply unit 100 is shown in Fig. 6 and includes a connection terminal 101, six-volt transformer 102, relays 103, 104, transformers 105, 106, vacuum tube circuits 107, 108, for furnishing the high frequency "cutting" and " coagulating currents respectively and an electrode 112 for connection to the body of the patient.