Abstract:

Objective To explore the feasibility of acoustic stimulation test（AST）in monitoring of fetal hearing with hypertensive disorders of pregnancy（HDP）. Methods The pregnant women with HDP were divided into mild group and severe group according to the severity of HDP，and then into full ⁃term group and premature group according to gestational age. ASTs were performed for all subjects，and those neonatal hearing were screened and diagnosed. The pregnant women without HDP hospitalized during the same period were randomly selected as the control group. The comparisons were done among the groups in terms of AST and hearing results. Results The positive rates of the AST in the severe HDP group was significantly lower than that in the mild HDP group and non⁃ HDP. The hearing loss rate of the severe HDP group was significantly higher than that of the mild HDP group and non⁃HDP group in the negative AST. The majority of hearing loss was mild to moderate in the positive AST，while the hearing loss of the non⁃HDP group was moderate to severe in both ears，and the majority of the loss in the HDP group was mostly in a single ear or/and both ears，from moderate or severe in the negative AST. Conclusion The AST is effective and feasible for the prediction and monitoring of the fetal hearing. The rate of hearing loss is higher in severe HDP with negative AST ，and the emphasis should be put on strengthening hearing monitoring and rescreening. 

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