This is an operation which is generally performed by the surgeon, but which almost any person may be called upon to perform in an emergency. The operation consists in seizing the end of the bleeding vessel with a pair of forceps, Fig. 495, and tying the artery with a ligature of silk or some other strong material. Catgut, horse-hair, silver and iron wire, and other similar substances are employed for this purpose. Silk ligatures arc quite irritating in character, and consequently soon come away by ulceration. When the wound must be closed immediately, catgut ligatures are employed, which are after a time absorbed, so that no further attention need be given them.

Fig. 495. Artery Forceps.

Fig. 495. Artery Forceps.

The operation of torsion, which consists in twisting the end of the severed artery, is now often employed instead of the ligature.