Basic principles of the FHR in acidotic and non-acidotic fetuses – an attempt to determine pH continuously using computer-aided procedures

Aims: Computer-aided analysis of the FHR offers the opportunity to analyse the FHR completely and to detect all changes possibly due to hypoxia and acidosis. It was the goal of this study to make hypoxic changes of the fetal heart rate (FHR) visible and to evaluate fetal acidosis continuously using three FHR-characteristics and special computer-aided procedures. Methods: During a period of 11 years the FHR signals (i.e. R-R intervals of the F-ECG) of 646 fetuses undergoing routine FHR-monitoring (HP8040)) were recorded simultaneously also by a computer. The files obtained were analyzed thereafter i.e. the result…