Dopplerfluxometria da Artéria Oftálmica em Gestantes: Concordância Interobservador frente à Apneia Induzida

Abstract

Objective: To evaluate the interobserver agreement between two examiners of Dopplerfluxometry of the ophthalmic artery (DOA) in healthy pregnant women at three different time points: before, during, and after induced apnea. Methods: Prospective longitudinal clinical study involving 30 healthy pregnant women. The DAO assessment was conducted by two experienced examiners, blinded to each other's results, in a single eye, and performed at three time points: Time 1 (before apnea), Time 2 (end of induced apnea), and Time 3 (three minutes after return to normal breathing). The following parameters were measured: first peak systolic velocity (P1), second peak systolic velocity (P2), peak ratio (PR), pulsatility index (PI), resistance index (RI), and end-diastolic velocity (EDV). The Bland-Altman method and the intraclass correlation coefficient were used to analyze interobserver reproducibility. Results: The findings identified excellent interobserver agreement for PR, IR, and PI at all time points analyzed. Good agreement was observed for VDF, P1, and P2, with small variations in the limits of agreement at the three time points. Conclusions: The DOA indices showed interobserver agreement for all indices analyzed in healthy pregnant women during three time points: at rest, at the end of induced apnea, and after a three-minute pause. Excellent agreement was observed for the PR, IP, and IR parameters at all time points (T1, T2, and T3), suggesting that they can be used safely in clinical practice. The results of this study indicate that induced apnea is feasible and can be used in the analysis of AO during pregnancy.