Background: Transient tachypnea of the newborn (TTN) is a frequently encountered form of neonatal respiratory distress. The underlying mechanism involves residual lung fluid that is delayed in clearance. TTN primarily occurs soon after birth and can last from 24 to 72 hours. Risk factors for TTN include elective cesarean section, male sex, late prematurity, low birth weight, macrosomia, polycythemia, maternal asthma and maternal diabetes. Treatment is often supportive with observation and potential oxygen supplementation.
Objective: To identify the risk factors associated with development of transient tachypnea of newborns who were delivered either normally or through cesarean section, at 36 weeks or beyound and to compare the results with those of others.
Patients and methods: This is a case -control study of 200 newborns suffering from respiratory distress during a period from the 1st of September 2011 to the 1st of September 2013 in the neonatal intensive care unit at AL-Kansaa Teaching hospital in Mosul. The perinatal history of newborns was analyzed. TTN was diagnosed on clinical basis and by exclusion of other diseases affecting the respiratory system including sepsis. The study included 200 healthy newborns as control.
Results: Multivariate analysis identified that the development of TTN was significantly associated with elective cesarean section 56% (p-value=0.001), male sex 66.5% (p- value=0.001), late prematurity 21% (p-value=0.009), maternal diabetes 8% (P-value=0.014), maternal asthma 10.5% (p-value=0.01), birth asphyxia (low APGAR score) 9.5% (p-value=0.005), low birth weight 16.5% (p-value=0.003), prolonged labor or using (forceps or vacuum) 22% (p-value=0.037) and in vitro fertilization 2.5% (p-value =0.024).
Conclusion: Transient tachypnea of newborns is strongly related to elective cesarean section, male sex, late prematurity, maternal diabetes, maternal asthma, birth asphyxia, low birth weight (1500-2500g), prolonged labor or using forceps or vacuum and in vitro fertilization..