[KongchangAI]
Unverified80% confidenceTradeoffTime unknown

胎心音清晰度与探测深度存在权衡:高灵敏度设备能更快捕捉胎心但也更易放大胎盘杂音和母体血流声(易与胎心混淆),新手需学会区分胎盘杂音(呼呼声)与真实胎心(马蹄声)

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