. The practice of anæsthetics . Fig. 31.—Mattress suture—(a) inserted ; (/>) Fig. 31 A.—Showing skin suture catching up deep fascia. 278 LIGATURES AND SUTlRES suffice (fig. 31). In inserting sutures care must betaken to avoid including or wounding importantnerves or vessels. In tying either ligatures or sutures,reef or surgical knots should be used to preventslipping. The free ends should be cut not longer than^ in.; as little foreign material as possible should beleft in the depth of a wound. Suture of special structures, such as tendons ornerves, is dealt with in the articles on th
. The practice of anæsthetics . Fig. 31.—Mattress suture—(a) inserted ; (/>) Fig. 31 A.—Showing skin suture catching up deep fascia. 278 LIGATURES AND SUTlRES suffice (fig. 31). In inserting sutures care must betaken to avoid including or wounding importantnerves or vessels. In tying either ligatures or sutures,reef or surgical knots should be used to preventslipping. The free ends should be cut not longer than^ in.; as little foreign material as possible should beleft in the depth of a wound. Suture of special structures, such as tendons ornerves, is dealt with in the articles on these subjects. Of Skill.—The perfect suture material for the skinpossesses smoothness, strength, elasticity, and at thesame time has such a structure as to have little or nocapillary attraction. None of the ordinary materialspossesses all these qualifications. Horsehair approachesperfection most nearly, but lacks strength. Silkwormgut is possibly used as widely as any. Silk andordinary threads have strong capillary attraction, butthe latter, when impregnated with celloidin or si
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