Research Article

Combined one- and two-dimensional ultrasound system for monitoring fetal breathing movements.

Br Med J 1976; 2 doi: (Published 23 October 1976) Cite this as: Br Med J 1976;2:975
  1. J W Wladimiroff,
  2. C M Ligtvoet,
  3. J A Spermon


    A combined one- and two-dimensional ultrasonic system for monitoring respiratory movements in the human fetus has been developed. A real-time cross-sectional image of the fetal chest at the level of the fetal heart can be obtained, and a time motion recording of fetal respiratory movements can then be written on a strip-chart recorder. Combining the features of one-dimensional and two-dimensional systems produces an accurate means of investigating fetal breathing movements.