. The science and art of midwifery. us circulation, transudation of serum takesplace into the subcutaneous cellular tissue, the folds subsequently dis-appear, and a swelling ensues. It will be seen that conditions favor-able to the production of the scalp-tumor are a soft, easily moldedhead, and such degree of transverse pelvic contraction as serves torender the circular pressure of the scalp complete. Owing to the lat-ter condition, the scalp-tumor is found more frequently and more de-veloped in justo-minor and generally contracted flattened pelves thanin simple flattened pelves with normal t
. The science and art of midwifery. us circulation, transudation of serum takesplace into the subcutaneous cellular tissue, the folds subsequently dis-appear, and a swelling ensues. It will be seen that conditions favor-able to the production of the scalp-tumor are a soft, easily moldedhead, and such degree of transverse pelvic contraction as serves torender the circular pressure of the scalp complete. Owing to the lat-ter condition, the scalp-tumor is found more frequently and more de-veloped in justo-minor and generally contracted flattened pelves thanin simple flattened pelves with normal transverse dimensions. Usuallythe tumor does not form until after rupture of the membranes. Attimes, however, in justo-minor pelves the head may become so fixedat the brim during the first stage of labor that a diffused swelling ofthe scalp may follow while the membranes are still intact. A scalp-tumor at the brim is of favorable import. It shows that the pains aregood. So long as the tumor continues to increase, if the presentation. 486 THE PATHOLOGY OF LABOR. is favorable, the accommodation of the head remains a increase of the tumor serves, too, to fix the head at the brim, andfavors the overlapping of the cranial bones. It likewise gives to thehead the form of an elongated ellipse, a form most favorable to itspassage through the contracted pelvic canal. Localized pressure-marks upon the childs head are derived, in thegreat majority of cases, from contact with the promontory. With lessfrequency they have their origin in pressure produced by the anteriorand lateral pelvic walls and the inward projection, in rachitic pelves,of the cartilage at the symphysis pubis. They consist of round andoval spots and reddened lines, which disappear in the lighter casesusually in from twelve to twenty-four hours. If the pressure has beenlong continued, it may give rise to ul-ceration, or even to complete destructionof the skin down to the not usually dangerous
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
