GB626182A - Improvements in or relating to endoscopic instruments - Google Patents

Abstract

626,182. Surgical optical instruments. AMERICAN CYSTOSCOPE MAKERS, Inc. June 11, 1947, No. 15370. Convention date, June 18, 1946. [Class 81 (ii)] An endoscope having a high-frequency resection device has optical means for bringing the cutting element into the field of vision of the telescope. In the instrument described the: optical means comprises a mirror pivoted about an axis perpendicular to the axis of the instrument and actuated by a longitudinally movable member at the outer end of the telescope. A main body member 20 fits into a collar 12 on the sheath 10 and carries a number of tubes for accommodating the telescope, lamp leads, mirror operating links and resection device. It also carries a rigid member 44 having a threaded portion 46 and a rack 47 and having a clamping device 51 which locates and secures the telescope 55. The resection member 65, having a cutting loop 66 is fixed in a tube 62 so as to be axially' slidable in a concentric tube 27 fixed in the body 20. The outer end of tube 62 is fixed in a block 70 so that the tool is reciprocable relative to the sheath 10, on rotation of the gear 71, engaging rack 47, by a handle 75. Electrical connection to the device is made through a terminal 79 in an insulating block 78 and connected with the central lead 64. The second connection is made to the body of the instrument through a terminal 16. A mirror 33, pivoted at 32, is provided to enable the tool 66 to be observed through the telescope when desired, and its angular setting may be adjusted and set by a milled nut 90 on the threaded rod 46 and which moves a block 85 connected to the mirror 33 through one link 91 on each side. Illumination is provided by a lamp on each side of the tool 66, see Fig. 1 (not shown).