[Intrauterine growth retardation--CTG findings in pre-partum oxygen respiration and transcutaneous nerve stimulation].
In 33 pregnant women with sonographic diagnosis intrauterine growth retardation (IUGR) 75 O2-mask respirations or, for a comparison, 63 transcutaneous electric paravertebral nerve stimulations (TENS) were carried out between 30 to 39 weeks of gestation. Before, during and after these measures the fetus was monitored by means of continuous CTG-registration. Both in the O2-inhalations and in the TENS the dominant CTG-changes were the rise of the acceleration frequency (in about 41% respectively 49% of the measures) and the increase of the fetal movements (in about 35% respectively 64% of the measures). In the case of some O2-respirations prognostically unfavourable CTG-changes occurred, like fetal tachycardia (in 9 experiments) and firstly occurring decelerations (in 8 experiments), Spikes not being taken into consideration. As those CTG-changes were also seen in some cases with TENS it is concluded that these findings were caused by retardation and that most probably O2-respiration cannot be charged with. Additionally a report is given on nuclearmedical measurements of the uteroplacental blood circulation and on determinations of the concentration of the serumal oxytocinase. The present study shows that by O2-respiration in connection with IUGR obviously no acute risk for the fetus exists which could be proved in the CTG. However it permits no conclusion on the therapeutic effect.