. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . )y the aid of this instrument, the lesion being first exposed by it THE ELECTRIC LIGHT AS AN AID TO DIAGNOSIS 185 and then the desired drug being apphed by means of a suitable appli-cator. An example is shown in Fig. 127. That of Fenwick is arranged Fig. 127 Valentines urethroscope. SO that after the tube is introduced the urethra can be inflated withair, thus exposing a long, flat wall instead of a small circle of relaxedmucous membrane, as seen with other instruments. While the best Fig. 128. Ein
. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . )y the aid of this instrument, the lesion being first exposed by it THE ELECTRIC LIGHT AS AN AID TO DIAGNOSIS 185 and then the desired drug being apphed by means of a suitable appli-cator. An example is shown in Fig. 127. That of Fenwick is arranged Fig. 127 Valentines urethroscope. SO that after the tube is introduced the urethra can be inflated withair, thus exposing a long, flat wall instead of a small circle of relaxedmucous membrane, as seen with other instruments. While the best Fig. 128. Einhorns gastrodiaphane. source of light is a small lamp inside the tube (Fig. 127), the reflectedlight from a head mirror can be used (Fig. 138). 186 ELECTRICITY AS AN AID IN PROGNOSIS AND DIAGNOSIS Gastrodiaphane.—The gastrodiaphane (Fig. 128) was devised byEinhorn to illuminate the stomach and thus enable one to determine Fig. 129
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