14:59 Dec 2, 2013 |
English to Portuguese translations [PRO] Medical - Other | |||||||
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| Selected response from: rir United States Local time: 07:28 | ||||||
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aceleração inicial do batimento cardíaco fetal/shoulders Explanation: Variable decelerations are thought to represent a vagal response to some degree of umbilical cord compression. If the umbilical cord is only slightly compressed, this will obstruct the umbilical vein (low pressure system) which returns re-oxygenated blood to the fetal heart. The initial normal fetal response to this is a slight increase in fetal heart rate to compensate for the lack of blood return and the slowly diminishing oxygen supplies. If this slight increase in FHR is followed by a major drop in FHR, this phenomenon is called a "shoulder." http://www.brooksidepress.org/Products/Military_OBGYN/Textbo... QCOM - Fetal Heart Monitoring - Variable Deceleration - Utilis.net utilis.net/fhm/2427.htm This explains the initial increase in heart rate (shoulder) preceding the deceleration. Further compression of the cord leads to occlusion of the umbilical artery, http://utilis.net/fhm/2427.htm |
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