[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

家用远程胎监设备的多普勒超声探头频率应在1.0-2.0MHz之间,2.0MHz穿透力弱但对早孕胎心检测更敏感,1.0MHz适合孕晚期腹壁较厚孕妇,孕32周后建议选用带宽自适应的双频探头

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