Objective:To investigate the association between small vulnerable newborn (SVN) phenotypes and the risk of neurodevelopmental delay at the age of 1 year.Methods:A prospective cohort study was conducted. A total of 25 860 singleton infants from "The Born in Guangzhou Cohort Study" who completed the Gesell developmental scale assessment at 1 year of age between January 2013 and June 2025 were included. Maternal sociodemographic characteristics, and other information were collected using a self-administered questionnaire, and maternal pregnancy-related information and neonatal birth data were extracted from medical records. Global developmental delay (GDD) was defined as a developmental quotient below 86 in ≥3 domains of the Gesell developmental scale, which assesses the adaptive, gross motor, fine motor, language, and personal-social domains. The random forest algorithm was employed for missing data imputation. Based on prematurity, small for gestational age (SGA), and low birth weight (LBW), newborns were categorized into 6 phenotypes: preterm-SGA-LBW, preterm-appropriate for gestational age (AGA)-LBW, preterm-AGA-nonLBW, term-SGA-LBW, term-LBW-only or term-SGA-only, and term-AGA-nonLBW phenotype. Among these, the first 5 were classified as SVN phenotypes, and the last one served as the reference group. Inter-group comparisons were performed using analysis of variance (ANOVA), χ2 tests, or Kruskal-Wallis test, as appropriate.?? Multivariable robust Poisson regression models were applied to analyze the association of different SVN phenotypes with the risks of GDD and developmental delays in specific domains, with stratified analyses by sex. Results:Among the 25 860 infants, 13 719 (53.1%) were male and 12 141 (46.9%) were female. The gestational age at birth was 39.4 (38.6, 40.0) weeks. The overall detection rate of GDD at 1 year of age was 3.7% (962/25 860). The rates of delay across developmental domains, in descending order, language in 8 134 cases (31.5%), gross motor in 4 488 cases (17.4%), personal-social in 1 271 cases (4.9%), adaptive in 1 262 cases (4.9%), and fine motor in 621 cases (2.4%). Compared with the reference group, preterm-AGA-LBW, preterm-SGA-LBW, preterm-AGA-noneLBW, and term-SGA-LBW phenotypes were all associated with an increased risk of GDD, with the adjusted RR (95% CI) of 6.07(5.01-7.35), 4.81(3.11-7.46), 2.10(1.54-2.88) and 1.89(1.29-2.76) respectively.The preterm-AGA-noneLBW phenotype was all associated with an increased risk of delay in gross motor, language and personal-social functional domains (all P<0.05). The term-SGA-LBW phenotype was associated with an increased risk of delay in gross motor, fine motor and personal-social functional domains (all P<0.01). Whereas the term-LBW-only or term-SGA-only phenotype showed no statistically association with developmental delay in any functional domain (all P≥0.05). Conclusion:The combined classification based on gestational age and birth weight helps identify infants at high risk for neurodevelopmental delay at 1 year of age, suggesting that it may offer a reference for the rational allocation of clinical resources.

Objective:To investigate the association between small vulnerable newborn (SVN) phenotypes and the risk of neurodevelopmental delay at the age of 1 year.Methods:A prospective cohort study was conducted. A total of 25 860 singleton infants from "The Born in Guangzhou Cohort Study" who completed the Gesell developmental scale assessment at 1 year of age between January 2013 and June 2025 were included. Maternal sociodemographic characteristics, and other information were collected using a self-administered questionnaire, and maternal pregnancy-related information and neonatal birth data were extracted from medical records. Global developmental delay (GDD) was defined as a developmental quotient below 86 in ≥3 domains of the Gesell developmental scale, which assesses the adaptive, gross motor, fine motor, language, and personal-social domains. The random forest algorithm was employed for missing data imputation. Based on prematurity, small for gestational age (SGA), and low birth weight (LBW), newborns were categorized into 6 phenotypes: preterm-SGA-LBW, preterm-appropriate for gestational age (AGA)-LBW, preterm-AGA-nonLBW, term-SGA-LBW, term-LBW-only or term-SGA-only, and term-AGA-nonLBW phenotype. Among these, the first 5 were classified as SVN phenotypes, and the last one served as the reference group. Inter-group comparisons were performed using analysis of variance (ANOVA), χ2 tests, or Kruskal-Wallis test, as appropriate.?? Multivariable robust Poisson regression models were applied to analyze the association of different SVN phenotypes with the risks of GDD and developmental delays in specific domains, with stratified analyses by sex. Results:Among the 25 860 infants, 13 719 (53.1%) were male and 12 141 (46.9%) were female. The gestational age at birth was 39.4 (38.6, 40.0) weeks. The overall detection rate of GDD at 1 year of age was 3.7% (962/25 860). The rates of delay across developmental domains, in descending order, language in 8 134 cases (31.5%), gross motor in 4 488 cases (17.4%), personal-social in 1 271 cases (4.9%), adaptive in 1 262 cases (4.9%), and fine motor in 621 cases (2.4%). Compared with the reference group, preterm-AGA-LBW, preterm-SGA-LBW, preterm-AGA-noneLBW, and term-SGA-LBW phenotypes were all associated with an increased risk of GDD, with the adjusted RR (95% CI) of 6.07(5.01-7.35), 4.81(3.11-7.46), 2.10(1.54-2.88) and 1.89(1.29-2.76) respectively.The preterm-AGA-noneLBW phenotype was all associated with an increased risk of delay in gross motor, language and personal-social functional domains (all P<0.05). The term-SGA-LBW phenotype was associated with an increased risk of delay in gross motor, fine motor and personal-social functional domains (all P<0.01). Whereas the term-LBW-only or term-SGA-only phenotype showed no statistically association with developmental delay in any functional domain (all P≥0.05). Conclusion:The combined classification based on gestational age and birth weight helps identify infants at high risk for neurodevelopmental delay at 1 year of age, suggesting that it may offer a reference for the rational allocation of clinical resources.

Objective:To summarize the experience of brain death determination under veno-arterial extracorporeal membrane oxygenation (VA-ECMO) assisted circulatory support, especially apnea test (AT) precautions, and to provide references for brain death determination in this scenario.Methods:In 78 patients who had VA-ECMO at Organ Transplant Center, Zhengzhou People's Hospital from October 2019 to December 2023, 8 organ donors had brain death determination under VA-ECMO assisted circulatory support. Baseline data, clinical data, and VA-ECMO data during AT trial were collected from these 8 patients to summarize the process of brain death determination.Results:Six of the 8 donors met the criteria of brain death; 10 EEG, 12 evoked potentials and 15 ATs were performed. Complications in ATs, including hypotension, decreased oxygenation and arrhythmia, were alleviated after timely improved VA-ECMO flow and applied cardiotonic and pressor drugs.Conclusion:AT is key for successful brain death determination in organ donors under VA-ECMO assisted circulatory support; therefore, complications should be closely monitored and managed.

Objective:To investigate the factors influencing the decision to delivery interval (DDI) in emergency cesarean section in Guangzhou and the impact of DDI on maternal-infant outcomes.Methods:A retrospective study was conducted on clinical data of pregnant women who underwent emergency cesarean section at municipal and district maternal and child health hospitals in Guangzhou city in 2021. Per the classification method of emergency cesarean section and recommendations for DDI provided by National Institute for Health and Clinical Excellence guidelines, these subjects were classified into Category Ⅰ and Category Ⅱ cesarean sections. Each category was further divided into two subgroups based on DDI: the Category Ⅰ group into >30 min and ≤30 min subgroups, and the Category Ⅱ group into >75 min and ≤75 min subgroups. Chi-square test or Fisher's exact test, two independent samples t-test, Mann-Whitney U test, and logistic regression were used to analyze the potential factors influencing DDI and the impact of DDI on maternal-infant outcomes. Results:(1) Totally 502 women underwent urgent cesarean section, including 304 (60.6%) Category Ⅰ and 198 (39.4%) Category Ⅱ, were analyzed. Among the Category Ⅰ group, 30.3% (92/304) achieved a DDI of ≤30 min, while 37.4% (74/198) of Category Ⅱ cases had a DDI of ≤75 min. (2) For the Category Ⅰ cases, multivariate logistic regression showed that more patients under intravertebral anesthesia, than those under general anesthesia, had a DDI >30 min ( OR=14.04, 95% CI: 6.14-32.10) as well as more with ward-based emergencies than those with delivery room emergencies ( OR=3.21, 95% CI: 1.72-6.00, both P=0.001). Among the Category Ⅱ cases, logistic regression revealed that cesarean section during routine working hours was more likely to achieve DDI >75 min than that during resting hours ( OR=3.93, 95% CI: 2.03-7.63, P=0.001). The risk of DDI >75 min was higher in tertiary maternal and child health hospitals compared with secondary maternal and child health hospitals ( OR=2.45, 95% CI: 1.06-5.70, P=0.037). (3) Among the Category Ⅰ cases, compared with the DDI ≤30 min group, the DDI >30 min group had a lower risk of neonatal Apgar score ≤7 at 1 min ( OR=0.31, 95% CI: 0.14-0.69, P=0.004), but there was no significant difference in the risk of neonatal Apgar score ≤7 at 5 min ( OR=0.21, 95% CI: 0.04-1.17) or neonatal asphyxia ( OR=0.32, 95% CI: 0.07-1.44) between the two subgroups. In cases of Category Ⅱ cesarean sections, there was no significant difference in any maternal-infant outcomes between DDI ≤75 min and DDI >75 min subgroups. Conclusions:The location of emergency and types of anesthesia are the influencing factors of DDI for Category Ⅰ cesarean sections, while the operation time and level of maternal and child health hospital are the influencing factors of DDI for Category Ⅱ cesarean sections. We did not find any impact of DDI on maternal or infant outcome.

Objective To evaluate the clinical outcome of kidney transplantation from donation after brain death(DBD)donors complicated with acute kidney injury(AKI).Methods Clinical data of 216 DBD donors were retrospectively analyzed,and they were divided into the AKI group(n=69)and control group(n=147)according to the Kidney Disease:Improving Global Outcomes(KDIGO)guidelines.Donors in the AKI group were further divided into the KDIGO stage 1 and stage 2-3 subgroups.One hundred and thirty-five recipients were assigned into the AKI group and 288 recipients in the control group.Postoperative recovery of renal function and clinical outcomes of the recipients were recorded.The risk factors of delayed graft function(DGF)were identified.Results The highest serum creatinine(Scr)level,Scr level before procurement,the highest blood sodium level and blood sodium level before procurement in the AKI group were higher than those in the control group.The application duration of vasopressors in the AKI group was longer than that in the control group.In the AKI group,the amount of fluid resuscitation within 48 h was higher,the HCO3-level at admission was lower,and the incidence of diabetes insipidus and hypotension was higher than those in the control group.The highest Scr level and the Scr level before procurement in KDIGO stage 2-3 donors were significantly higher than those in KDIGO stage 1 counterparts(all P＜0.05).Compared with the control group,the incidence of DGF and acute rejection was higher,the proportion of continuous renal replacement therapy was higher,the Scr level within postoperative 90 d was higher,and the urine amount within postoperative 3 d was less than those of recipients in the AKI group.Compared with KDIGO stage 1 recipients,KDIGO stage 2-3 recipients had higher Scr levels at postoperative 3,4,5 and 15 d,and less urine amount at postoperative 2 d(all P＜0.05).Univariate analysis showed that donor age,the highest Scr level,the highest blood sodium level and the amount of fluid resuscitation within 48 h were the risk factors for DGF in recipients after kidney transplantation.Multivariate analysis showed that donor age was the independent risk factor for DGF in recipients after kidney transplantation(all P＜0.05).Conclusions For the application of DBD donors complicated with AKI,active organ maintenance should be performed to alleviate AKI.It exerts no effect upon graft function and survival rate at postoperative 6 months,which may achieve equivalent efficacy as non-AKI donors and may be used as a source of extended criteria donor kidneys.