Respiratory resistance (Ros) and dynamic ventilation variables in pregnant women of different gestational age with healthy lungs
Oddoy, A.; Joschko, K.; Vogel, J.
Zentralblatt für Gynakologie 104(20): 1270-1281
1982
ISSN/ISBN: 0044-4197 PMID: 7158147 Document Number: 187851
Respiratory resistance was oscillometrically measured (Ros) in 413 pregnant women (between seventh and 41st weeks of pregnancy) with clinically intact lungs, 31 non-pregnant women, and 34 puerperae, all probands in seated position. Respiratory rate, tidal volume, and flow were also measured. The Tiffeneau test was applied to analyse FEV1, FEV, and peak flow as well as PO2 in arterialised capillary blood in about 50 per cent of the probands. Respiratory resistance was found to be increased in pregnant women and puerperae, with maximum values being recordable in the sixth and ninth months of gravidity. Ros-values recorded from smaller women were higher than those recorded from women with taller figures. No relationships were established between age, parity, Broca's index, arterial blood pressure, respiratory rate, tidal volume, struma, dyspena, and smoking habits, on the one hand, and Ros, on the other. Respiratory rate stayed almost constant throughout pregnancy, while considerable rise was recordable from tidal volume and, consequently, respiratory minute volume. Relative one-second capacity (FEV1/FEV; 0/0) and vital capacity did not change.