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Prenatal detection of pulmonary hypoplasia in giant omphalocele.
Pediatric Surgery International 2008 January
Respiratory insufficiency has sometimes been reported in giant omphalocele. To determine whether ultrasonic fetal lung measurements including lung/thorax transverse area ratio (L/T) and chest/trunk length ratio (C/T) may be useful in predicting associated pulmonary hypoplasia, 28 fetuses with abdominal wall defects between 1991 and 2003 were reviewed. Nine patients with gastroschisis and 19 with omphalocele were classified into three groups. A group with neonatal death and postmortem lung/body weight ratio below 0.012, which was defined as pulmonary hypoplasia (PH group), included two ruptured giant omphaloceles and two giant omphaloceles with intact covering membrane in utero. A group with artificial ventilation more than 3 months, which was defined as prolonged ventilation (PV group), included one ruptured giant omphalocele and three giant omphaloceles with intact covering membrane. Others were defined as ordinary group. In 12 fetuses with giant omphalocele, the evisceration rate of the liver (LER) was measured in the fetal transverse abdominal dimension including the base of the liver. The L/T in PH group was significantly decreased to other groups. The C/T in PH group was significantly increased to ordinary group. There was no significant difference in the LER among three groups. A measurement of L/T may be useful in predicting associated pulmonary hypoplasia in giant omphalocele. However, antenatal detection of patients required prolonged ventilation may be difficult and require further study.
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