[Risk factors for bronchopulmonary dysplasia in twin preterm infants: a multicenter study].

Objectives: To investigate the risk factors for bronchopulmonary dysplasia (BPD) in twin preterm infants with a gestational age of <34 weeks, and to provide a basis for early identification of BPD in twin preterm infants in clinical practice.

Methods: A retrospective analysis was performed for the twin preterm infants with a gestational age of <34 weeks who were admitted to 22 hospitals nationwide from January 2018 to December 2020. According to their conditions, they were divided into group A (both twins had BPD), group B (only one twin had BPD), and group C (neither twin had BPD).

[Establishment of a nomogram model for predicting necrotizing enterocolitis in very preterm infants].

Objectives: To investigate the risk factors for necrotizing enterocolitis (NEC) in very preterm infants and establish a nomogram model for predicting the risk of NEC.

Methods: A total of 752 very preterm infants who were hospitalized from January 2015 to December 2021 were enrolled as subjects, among whom 654 were born in 2015-2020 (development set) and 98 were born in 2021 (validation set). According to the presence or absence of NEC, the development set was divided into two groups: NEC (=77) and non-NEC (=577).

Effect of electrode temperature on measurements of transcutaneous carbon dioxide partial pressure and oxygen partial pressure in very low birth weight infants.

Objectives: To evaluate the accuracy and safety of measurements of transcutaneous carbon dioxide partial pressure (TcPCO) and transcutaneous oxygen partial pressure (TcPO) at electrode temperatures lower than the value used in clinical practice in very low birth weight infants.

Methods: A total of 45 very low birth weight infants were enrolled. TcPCO and TcPO measurements were performed in these infants.