DIAGNOSTIC TECHNIQUE FOR CHRONIC FOETAL HYPOXIA Russian patent published in 2015 - IPC A61B8/06 

FIELD: medicine.

SUBSTANCE: technique involves foetus's middle cerebral artery Doppler ultrasonography prior to and after a pregnant woman holds her breath as much as possible at a depth of inhale. Diagnostically significant indices of blood velocity curves resistance in the foetus's middle cerebral artery that are a systolic/diastolic ratio, a resistance, a pulsation index are measured with a breath-holding test conducted and taking into account foetus's daily rhythmostasis. If the Doppler ultrasound measures are: the systolic/diastolic ratio at 12.00 prior to breath-holding 3.71±0.05, after breath-holding 4.56±0.08 and at 20.00 prior to breath-holding 3.92±0.06, after breath-holding 4.74±0.09; the resistance at 12.00 prior to breath-holding 0.69±0.03, after breath-holding 0.87±0.04 and at 20.00 prior to breath-holding 0.80±0.03, after breath-holding 0.91±0.04; the pulsation index at 12.00 prior to breath-holding 1.78±0.04, after breath-holding 1.92±0.03 and at 20.00 prior to breath-holding 1.84±0.04, after breath-holding 1.97±0.04, changes in the foetus's functional status are detected and chronic foetal hypoxia is diagnosed.

EFFECT: technique enables increasing the diagnostic accuracy in chronic foetal hypoxia by measuring the functional parameters taking into account the time variations of daily rhythmostasis.

1 ex