Abdominal external noninvasive fetal blood oxygen saturation degree detecting device

Abstract

An abdominal external noninvasive fetal blood oxygen saturation degree detecting device comprises an abdominal external fetal oximeter and a signal detecting assembly connected with the abdominal external fetal oximeter, wherein the abdominal external fetal oximeter comprises a signal processing controller, and the signal detecting assembly comprises a luminous source device and a light receivingdevice. The luminous source device, the light receiving device and a reference signal detecting device are connected with the signal processing controller, and the luminous source device irradiates two or more different wavelengths of light into the abdomen of a pregnant woman. The light receiving device comprises multiple light receivers respectively arranged at multiple different abdominal external positions of the pregnant woman, acquires multiple light signals scattered and reflected back from the abdomen of the pregnant woman and relevant to fetal blood oxygen saturation degree, superposes the signals and then outputs light signal sum relevant to the fetal blood oxygen saturation degree to the signal processing controller so as to improve the intensity of received light signals.

Description

technical field [0001] The invention relates to the technical field of blood oxygen saturation detection in medical equipment, and more specifically relates to an extra-abdominal non-invasive fetal blood oxygen saturation detection device. Background technique [0002] The later stages of pregnancy, as well as the labor and delivery phases, can be a dangerous time for the mother and fetus. If the fetal umbilical cord becomes twisted in an unfavorable position, the placenta separates prematurely, or certain diseases of the mother and fetus can lead to insufficient oxygen in the fetal blood, which can lead to fetal brain damage or death. Pulse oximetry (SaO 2 ) to indirectly monitor the human body, including the oxygen content in fetal blood. [0003] At present, fetal heart rate and heart sound monitors have been widely used in the monitoring of fetal physiological state. Since the oxygen supply of the fetus is not obtained by the fetus itself, but is transported by the mo...

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Problems solved by technology

[0005] The applicant also found in the research that the extra-abdominal fetal non-invasive blood oxygen saturation monitoring system must have enough power to irradiate the pregnant woman's abdomen in order to ensure that the optical receiver receives effective light signals related to the fetus. Increase the luminous power of the light source. Based on the currently used light-emitting elements (such as LEDs and lasers), the light-emitting area is very small, and it is usually close to the skin of pregnant women. There is a possibility that the skin of pregnant women will feel uncomfortable or be burned during use.

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