Pictorial midwifery : an atlas of midwifery for pupil midwives / by Sir Comyns Berkeley.

  • Comyns Berkeley
Date:
1941
Catalogue details

Licence: In copyright

Credit: Pictorial midwifery : an atlas of midwifery for pupil midwives / by Sir Comyns Berkeley. Source: Wellcome Collection.

    25/186 (page 7)
    \ FIG. 6.—AXIS OF THE PELVIC CANAL. The axis of the pelvic canal shows the position of the centre of the head of the foetus as it passes through the pelvis. This axis, which is an imaginary line, is obtained by taking any number of antero-posterior diameters of the true pelvis, between the plane of the brim and that of the outlet, and joining the centre of these diameters, FIG. 7.—MEASUREMENT OF THE DIAGONAL CONJUGATE. The true conjugate can only be measured directly after labour by a special instru¬ ment. An estimate of the true conjugate is, however, made by passing two fingers of the right hand backwards and upwards into the vagina till the end of its middle finger touches the promontory of the sacrum. The hand is then carried upwards and forwards until its index finger touches the apex of the pubic arch. The index finger of the left hand is then placed at the point of contact, the fingers are withdrawn from the vagina, and the distance between the tip of the middle finger of the right hand and where the index finger of the right hand has touched the pubic arch is measured with a tape measure. Normally the measurement should be 4f inches. Thus, to ascertain the measurement of the true conjugate, Vinch must be deducted from that of the diagonal conjugate. 2.