INTRAVAGINAL MARKERS FOR ACCURATE RADIONUCLIDE LOCALIZATION OF THE PLACENTA

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Abstract
Fifteen pregnant patients were studied with regard to the accuracy of the symphysis pubis as an indirect indicator of the position of the internal cervical os in placental imaging. A radionuclide marker was placed in the posterior vaginal fornix to [See figure in the pdf file] approximate the region of the internal cervical os. The distance between this marker and the one placed over the symphysis pubis ranged from 0 to 8 cm., with an average of 4 cm. It is concluded that an intravaginal, rather than a pubic, marker is required to distinguish placentas which are low-lying and previa, since the two conditions necessitate divergent management. This is particularly true of those patients wherein the fetus is in a transverse lie and the cervix is pulled cephalad.

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