Outlines of midwifery : developing its principles and practice.

  • Conquest, J. T. (John Tricker), 1789-1866.
Date:
1820
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of midwifery : developing its principles and practice. Source: Wellcome Collection.

    10/238 (page 8)
    Laterally, four inches; Anteriorly, two inches. The outlet of the pelvis, when viewed with the sacro ischiatic ligaments attached to it, assumes a quadran¬ gular shape. Its shortest diameter is from one tuberosity of the ischium to the other, and is about four inches, the soft parts remaining; its longest diameter is from the apex of the os coccygis to the arch of the pubes, and measures five inches, including one which it acquires from the mobility of the coccygeal bone permitting it to re¬ cede in most women, as the head of the child passes tot during its extrusion. Unless these dimensions be borne in mind, malposition of the head cannot be rectified, nor can any correct opinion of the progress or duration of labour be given. AXIS OF THE PELVIS. Without a correct knowledge of the axis of the brim, cavity, and outlet of the pelvis, manual and instrumental assistance cannot be advantageously afforded. The line of the axis of the vertebral column is perpendicular to the horizon. The axis of the brim of the pelvis is disco¬ vered by a straight line from the umbilicus to the apex of the os coccygis. The axis of the cavity is determined by a female catheter of the usual curvature • one ^ •* J fixed about the centre of the ’ y being Pelvis and the 1 Pen°r aPerture of the pelvis, and the other at the os externum