The cause of neonatal asphyxia

Neonatal asphyxia due to hypoxia is that newborns in fetal distress and delivered from the process of respiration and circulation obstacles, in one minute after birth, there is no delay in breathing independently, but the heart is still there. Newborn asphyxia is the most common diseases, neonatal death and disability is also the main reason. Cause Neonatal asphyxia is the essence of hypoxia. Where impact of maternal and fetal blood circulation and the reasons for the gas exchange would cause fetal hypoxia. (A) of maternal and fetal blood gas exchange between the obstacles ① blocked blood flow: If the umbilical cord prolapse, around neck, knotting, oppression, reversing the result of fetal blood supply or inadequate blood supply disruption caused by the lack of oxygen, which inhibited the hub of suffocation occurred. ② placenta gas exchange obstacles: If the placenta dysfunction, placenta previa, the placenta early peeling, such as low placenta. ③ the maternal side of the placenta perfusion inadequate: If pregnancy-induced hypertension, bleeding, severe anemia, shock and chronic heart, lung, kidney disease or the use of anesthesia during childbirth, sedative drugs. (B) process abnormal delivery ① fetal head too large or too small pelvis mother, fetal position unrighteousness, radical production, labor extension, a strong contractions or forceps delivery and so can inhibit the respiratory center. ② middle diaphragm paralysis caused injury, pneumothorax, mediastinal emphysema, thoracic duct tear caused by suffocation, and other chylothorax. ③ fetus after birth canal when inhaled amniotic fluid or blood, so that airway obstruction caused by suffocation. (C) the disease itself fetus Respiratory, cardiovascular congenital malformation, neonatal hemolytic disease, severe anemia, metabolic and electrolyte disturbance and hyaline membrane disease, severe infections, can cause suffocation.