Operative surgery . contact with the apposed surfaces of the sac by manipulation and retainedfor five or ten minutes, or until the patient complains of pain or faintness,and then allowed to escape through the cannula. If the pure tincture beused, a drachm or two injected in the same manner, and allowed to remain,is quite sufficient. If the sac be small, fifteen or twenty drops may bethrown into it by a hypodermic syringe, without the previous removal ofthe fluid, and its diffusion secured by manipulation. A drachm or two of a ten- to fifty-per-cent solution of carbolic-acidcrystals in glycerin


Operative surgery . contact with the apposed surfaces of the sac by manipulation and retainedfor five or ten minutes, or until the patient complains of pain or faintness,and then allowed to escape through the cannula. If the pure tincture beused, a drachm or two injected in the same manner, and allowed to remain,is quite sufficient. If the sac be small, fifteen or twenty drops may bethrown into it by a hypodermic syringe, without the previous removal ofthe fluid, and its diffusion secured by manipulation. A drachm or two of a ten- to fifty-per-cent solution of carbolic-acidcrystals in glycerin may be injected and allowed to remain. From half adrachm to a drachm of pure carbolic is often injected into the emptysac, or while yet there remains a small amount of the fluid acid causes less pain and is a more constant and certain remedythan iodine. This plan of practice is strongly advocated by competentobservers, and frequently after the injection the patient is permitted to beout and Fig. 1427.—The tapping of a liydrocele of tunica finger resting on instrinnent and tumor com-pressed by hand. 1212 OPERATIVE SURGERY. TJte Precautions.—Inasmuch as the pain attending tlie injection isoften severe, and as fainting may occur, the recumbent posture is injection of a congenital hydrocele is manifestly a dangerous expedient,but the diagnosis of its presence will prevent accident. The unsuspectedescape of the end of the cannula from the sac, and the consequent introduc-tion of the injection of the scrotal tissues, is an unfortunate occurrence,especially when followed by extensive inflammation and sloughing. If theend of the cannula thus escapes, an independent puncture should be made atonce, as the previous opening can not be easily found. Injection for the cure of a hydrocele dependent on malig-nant disease of the testicle is useless andmisapplied treatment, to say the least. Hy-droceles with thick walls are not suite


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