Operative surgery, for students and practitioners . ty of thetunica vaginalis. In doing this one should remember that the testisoccupies the lower back part of the sac. With the trochar in the cavityof the tunica vaginalis one should be able with it to touch the hypo-dermic needle previously introduced into the sac above. The sac isallowed to empty itself through the cannula, and this is then with-drawn. The barrel of the hypodermic S3^ringe is now filled with thefluid to be injected. Twenty minims of a 95-per-cent. carbolic-acidsolution may be used, with satisfactory results, for this purpose
Operative surgery, for students and practitioners . ty of thetunica vaginalis. In doing this one should remember that the testisoccupies the lower back part of the sac. With the trochar in the cavityof the tunica vaginalis one should be able with it to touch the hypo-dermic needle previously introduced into the sac above. The sac isallowed to empty itself through the cannula, and this is then with-drawn. The barrel of the hypodermic S3^ringe is now filled with thefluid to be injected. Twenty minims of a 95-per-cent. carbolic-acidsolution may be used, with satisfactory results, for this purpose. OPERATIONS UPON THE SPER:\L\TIC CORD, SCROTUM, ETC. 643 This is thrown into the cavity of the tunica vaginalis through thehypodermic needle, and then this needle is also withdrawn. Thefluid that has been thus introduced into the cavity of the tunicavaginalis is distributed over the whole cavity by manipulating thescrotum. The punctures made by the instruments are covered overwith a thin coat of collodion, and a very thin film of Fig. 293.—Hydrocele, Tapping. CTV, cavity of the tunica vaginalis testis;T, testis; V, vas deferens. Hypodermic needle introduced into the upper partof the sac; trochar cannula into the lower part. This operation is usually followed by some effusion into the sac,and with but little or no pain. After a few days rest in bed withthe scrotum supported, these sjmiptoms subside. The operatoin isnot painful, but the part where the trochar is to be introduced mavbe anesthetized with ethyl chloride if desired. Open Operation (Volkimanx).—^This operation is suitable forthose cases that have already been tapped many times or where theoperation previously described has been tried and has failed. 644 HERNIA, ETC. The scrotum is grasped by an assistant in order to make it tenseand to steady it. An incision is made through the anterior wall ofthe scrotum^ opening into the cavity of the tunica vaginalis. Thelength of the incision depends upon th
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