Baseline and Acceleration Episodes - Clinically Significant Nonstationarities in FHR Signal: Part II. Indirect Comparison
The analysis of fetal heart rate (FHR) trace is not based on evaluation of the baseline itself, but on the episodes which have been detected using this baseline - the acceleration (A) and deceleration (D) patterns. This implies the following approach: for a given trace the baseline is estimated automatically according to the algorithm selected, and once again manually by the clinical expert. For each baseline the A/D patterns are identified automatically by the fixed recognition algorithm. In the next step, the baseline interference procedure is used, which ensures constant difference between the primary baseline and the baseline with the interference superimposed. This difference corresponds to the average expertŠs inconsistency. The goal was to check the correlation between the inconsistencies of baselines and A/D episodes. The obtained results gave a proof that two baselines (from two different automated estimation methods) must be compared indirectly, solely on the basis of the A/D recognized when using them.
KeywordsClinical Expert Fetal Heart Rate Indirect Comparison Baseline Algorithm Fetal Heart Rate Variability
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