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WS15‐02Fetal biophysical profile and kinetic measurement: Doppler contribution
Author(s) -
Troyano J. M.
Publication year - 2000
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.2000.00009-1-94.x
Subject(s) - biophysical profile , fetus , medicine , amniotic fluid , gestational age , gestation , doppler effect , laser doppler velocimetry , respiration , obstetrics , pregnancy , physiology , anatomy , blood flow , biology , physics , genetics , astronomy
Background Two methods are presented for the assessment of fetal behaviours under the application of Doppler effects: (a) Measurement of the velocity wave of fetal limb by vibroacustic stimulating. (b) Hydrodynamic evaluation of the transnasal amniotic velocity wave and its relation to gastric peristalsis. Method A Doppler device was employed to assess the velocimetry wave from the ‘FEMORAL BONE’ in motion, following vibro‐acoustic stimulation in 138 phisiological pregnancy and Doppler‐aided evaluation of transnasal amniotic hydrodynamics. Results and conclusion Assessment of normal fetal behaviour. Quantification of patterns of reactivity of any body structure. Reduction in the duration of explorations for biophysical profiles. (3–4 min). Fetal reflex responses slow down and become increasingly complex as maturation carries on. Both mean velocity and acceleration of fetal reactive responses experience a gradual decline throughout gestation. The time a fetus takes to respond to a stimulus increases directly with gestational age. Simultaneousness between fetal respiration episodes and phases of gastric distention and activity. (physiological conditions). Fetal active respiration can be unequivocally accounted for by Doppler assessment of the activity of intake/release of amniotic fluid along the high respiratory branches of the pulmonary tree. Amniotic respiratory dynamics are always transnasal in physiological conditions. Velocities of transnasal, decreasing steadily from the 32nd gestational age to the end of gestation.