Clinical lectures on the surgical diseases of the urinary organs . m injury. In theshaft just above the elbow is inserted a glass prism (f), bywhich the rays of light from the bladder are refracted alonga telescope, inserted in the shaft and capable of being re-moved for the purpose of being cleaned or for use in anotherinstrument. The rim of the ocular end (b) through whichthe observer looks is covered by a thin plate of ebonite, toprevent shock in case of contact of the eyebrows with thecystoscope. A knob (b) on the edge of the ocular end indi- 5 66 Tin: CYSTOSCOPE cates the aspect of the bl
Clinical lectures on the surgical diseases of the urinary organs . m injury. In theshaft just above the elbow is inserted a glass prism (f), bywhich the rays of light from the bladder are refracted alonga telescope, inserted in the shaft and capable of being re-moved for the purpose of being cleaned or for use in anotherinstrument. The rim of the ocular end (b) through whichthe observer looks is covered by a thin plate of ebonite, toprevent shock in case of contact of the eyebrows with thecystoscope. A knob (b) on the edge of the ocular end indi- 5 66 Tin: CYSTOSCOPE cates the aspect of the bladder towards which the beak andprism arc directed from time to time. By means of ascrew (D) the circuit can be closed and opened. This the connecting screws, are carried on a rotatoryplate or swivel, so that with the finger and thumb oi onehand placed on the cylinder (a) the beak oi the Instrumentcan be revolved so as to bring any part oi the bladder intoview, while the connecting cords remain in position, beingheld downwards bv tlu other hand. ^. I ig. 35- In the most recent form oi pe (Fig, 35) .1 cold lamp md this is fixed in the beak: SO when .1 lamp ! th«- beak 1- simply replaced 1>> .1 fresh one with • tained lamp. This cold lamp when burning in air em !»-• touched by the fingers, whereas the ordinarylamp on) ca-1 w hen burning in fluid. A metal cap n to the ocular end. protecting the that the whole instrument can thus be immersedin fluid for sterilizali<in. 1 1 removal i -t the i ap, an i p rev ed on In light 11 Kcluded w ben the eye is appliedi.) th< THE CYSTOSCOPE 67 The cords are permanently fixed to the rotatory plate, andconnexion with the battery is effected by simply clippingthis on to the cylinder (a). These improvements, which have been introduced withinthe past three years or so, have rendered the cystoscope amuch more safe and efficient instrument. The standard cystoscope employed for adult males is insize 22 of the Fren
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