A textbook of obstetrics . Fig. 520.—Showing the direction in which traction must be made by the handles,and the correspondence of the direction in traction upon the traction-handle and thedirection in which the head must Fig. 521. — Hermanns forceps. vided with a better cephalic curve than any other forceps ; butif it should not be applied accurately to the sides of the head, itis capable of doing the childs head great damage. A very use-ful instrument also in the authors experience is a light, shortforceps for use at the parturient outlet. As the mechanism of labor was better apprecia
A textbook of obstetrics . Fig. 520.—Showing the direction in which traction must be made by the handles,and the correspondence of the direction in traction upon the traction-handle and thedirection in which the head must Fig. 521. — Hermanns forceps. vided with a better cephalic curve than any other forceps ; butif it should not be applied accurately to the sides of the head, itis capable of doing the childs head great damage. A very use-ful instrument also in the authors experience is a light, shortforceps for use at the parturient outlet. As the mechanism of labor was better appreciated, and theforceps came into more general use in the latter part of the OBSTE TRIC OPERA TIOXS. present century, it was realized that a certain amount of forcewas lost in the extraction of the childs head by the necessity ofpulling the forceps in great part in the line of their angle at which this force met the direction it is desired toimpose upon the head is shown in figure 520. This difficultyhas been overcome by the axis-traction principle, first proposedand carried out by Hermann, but the popularization of which we owe to Tarnier, of Paris. Figure the latest and best
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
