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PLATE 5.-FIGURE 1.

*a, a. Double myomatous growths—both multilobular. b, b. Uterine tissue much changed by lateral pressure.

FIGURE 2. *a, a, a, Three independent tumors. b, b, b. Series of extraordinarily enlarged peripheral vessels. c, c, c. Connective tissue.

The surrounding uterine tissue, under the pressure and tension exerted by the growing masses, is changed into bands of more or less parallel fibres which might be mistaken for connective tissue.

*A Towle's one-inch objective used.

PLATE 6.-FIGURE 1.

Sections chosen from the series magnified four hundred diameters, A Towle's immersion homeogeneous tenth used.

The muscular bundles are seen cut in various directions. The nuclei of many of the cells are easily distinguished. Con nective tissue stroma is nowhere in excess.

[graphic][graphic]

UPON THE MECHANICAL TREATMENT OF DELIVERY FROM THE SUPERIOR

STRAIT.

MODES OF APPLICATION OF THE FORCE APPLIED,

ILLUSTRATED BY A MODIFIED FORM OF THIE
FORCEPS.

By W. H. GRAINGER, M.D.,

BOSTON, MASSACHUSETTS.

Within the past few years the subject of instrumental delivery has received much consideration at the hands of many eminent obstetricians, and as the result of their investigations several instruments known as axis-traction forceps have been offered to the profession.

The principal objection raised against the old straight forceps was, that the line of traction, owing to the conformation of the canal through which the fætal head had to pass, was in the axis of the pelvic cavity rather than in that of the brim. To obviate this difficulty a sacral curve was added, varying from a slight bend to a deep angle to suit the idea of the inventor.

To those who believed in the long double curved instruments the question of direct traction seemed to have been satisfactorily settled by the addition of the sacral curve,-evidently forgetting, in their theoretical enthusiasm, that they were ignoring a wellknown principle of mechanics, namely, that the line of traction is always direct from the point at which the power is applied to the place of resistance. Hence we see that this important modification of the straight forceps although it enables us more readily to seize the head when at the brim, and prevents, in a measure, the possibility of slipping, we are still far from accomplishing the object sought after.

Again, it we follow the instructions laid down with much emphasis by most American and many English authors, the

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