The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 8i2.—Achondroplasic Dwarf.— (Depaul.) Fig. S13.—Dwarf Pelvis. on account of the peculiarities of the sacrum, which is not situated so anteriorlyas the normal, may be longer than usual. Another important measurementis that of the pelvic circumference, which is always much less than internal examination should be carefully made, especially the estimationof the transverse diameters. Prognosis.—Difficulty begins with the onset of labor and increases withits progress. The head is overflexed
The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 8i2.—Achondroplasic Dwarf.— (Depaul.) Fig. S13.—Dwarf Pelvis. on account of the peculiarities of the sacrum, which is not situated so anteriorlyas the normal, may be longer than usual. Another important measurementis that of the pelvic circumference, which is always much less than internal examination should be carefully made, especially the estimationof the transverse diameters. Prognosis.—Difficulty begins with the onset of labor and increases withits progress. The head is overflexed with a consequent prominence ofthe posterior fontanelle, while the sagittal suture lies commonly in an obliquediameter (Fig. 639). Descent is slow, but there is rarely the lateral obliquitywhich is seen in flat pelves. Breech presentations are especially to be dreaded 620 PATHOLOGICAL in this form of pelvis, for it is very difficult to free the legs and arms, and tobring the head down through the contracted canal. Although the motherdoes not suffer from injuries to the soft parts which are incident to labor insome forms of contracted pelvis, still the pelvic joints are liable to be rupturedand eclampsia is very common. As for the child, the caput succedaneum is ofunusual size and is just over the smaller fontanelle. The cranial bones greatlyoverlap (Fig. 582). II. Simple Flat, Non-rachitic Pelvis (Fig. 894).—A frequent form of de-formed pelvis consists in the shortening of the antero-posterior diameter. This variety is common and was the firstcontracted pelvis to be was not till later that the distinc-tion between it and the rachitic fiatpelvis was made clear. Frequency and Etiology.—The etiol-ogy is obscure, although, as a rule, thistype of pelvis is probably is a very common type and is foundas often among the upper classes asamong
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
