Fetal Doppler – NSL – Sonoline C Contec (China)

一种多普勒胎儿监测器is a hand-heldultrasound用于检测的换能器胎儿心跳为了prenatal care。它使用了多普勒effectto provide an audible simulation of the heart beat. Some models also display theheart ratein beats per minute (BPM). Use of this monitor is sometimes known as多普勒auscultation。多普勒胎儿监测器通常简称为a多普勒or胎儿多普勒。它可以被归类为一种形式多普勒超声检查（虽然通常不是技术上-graphy但相当响应）。

多普勒胎儿监测器s provide information about the fetus similar to that provided by afetal stethoscope。多普勒胎儿监测器上的一个优点（纯声学）胎儿听诊器是电子音频输出，允许用户以外的人听到心跳。一个缺点是更大的复杂性和成本以及电子设备的可靠性。^{[需要引用]}

该器件于1958年由Edward H. Hon博士发明，^[1]Originally intended for use by health care professionals, this device is becoming popular for personal use.

家庭或医院使用的多普勒以以下方式不同：

• 制造商：流行的制造商是宝贝多普勒，SonoLine，超声波技术，纽曼医疗，Nicolet（由Natus购买），Arjo-Nuntleigh和HaveIT多普勒（现在的Cooper外科）。
• Probe type: waterproof or not. Waterproof probes are used for水分娩。
• 探针频率：2-MHz.or 3-MHz.调查。大多数从业者可以找到心率with either probe. A 3-MHz probe is recommended to detect a heart rate in early pregnancy (8–10 weeks妊娠). A 2-MHz probe is recommended for pregnant women who are overweight. The newer EchoHeart 5-MHz transvaginal probes aids in the detection of fetal heart tones (FHT) early in pregnancy (6–8 weeks) and for patients who have a retroverted uterus or throughout pregnancy for FHT detection for women who are obese.
• 心率显示：一些多普勒自动显示内置LCD上的心率;对于别人，必须由从业者计算和定时胎儿心率。

一种major advantage of being able to record and share the recording is that it can be emailed to a healthcare professional to be checked if there are any concerns about whether or not it is the fetus’s heart rate and whether or not is normal. Typically, they work from about 12 weeks.^{[需要引用]}

The use of the wordSonicaid.对于多普勒胎儿监视器来自英国公司的产品Sonicaid.有限公司Sonicaid产品包括D205 / 206便携式胎儿多普勒和FM2 / 3/4系列胎儿显示器。该公司于1987年由牛津工具收购，形成牛津Sonicaid。