The mode of delivery and gestational age for very-low-birth-weight (VLBW) preterm infants are not yet well established and are constant topics of debate. Objective: To analyze the impact of delivery mode on morbidity ...The mode of delivery and gestational age for very-low-birth-weight (VLBW) preterm infants are not yet well established and are constant topics of debate. Objective: To analyze the impact of delivery mode on morbidity in preterm infants weighing less than 1500 g. Results: Among 21,957 births, 81 were analyzed;53 were delivered vaginally, and 28 were delivered by cesarean section. The median maternal age, gestational age and body mass index among those delivered vaginally and by cesarean section were 20 years and 22.5 years, 27.6 weeks and 30.1 weeks, and 26.0 kg/m2 and 27.8 kg/m2, respectively. With respect to neonatal blood gas parameters, for those born vaginally and by cesarean section, the median pH was 7.32 and 7.24, the pCO2 was 41.5 mmHg and 51.1 mmHg, and the pO2 was 22.3 mmHg and 16 mmHg. The median fetal weight among those born by cesarean section and vaginally were 1180 g and 955 g, respectively. The median Apgar scores at the first and fifth minutes among those born by cesarean section and vaginally were 5.00 and 8.00 and 4.50 and 7.00, respectively. Conclusion: There was no significant difference between the results of vaginal and cesarean delivery for VLBW infants. Thus, further studies on this subject are needed.展开更多
<strong>Introduction</strong><span style="font-family:Verdana;"><strong>: </strong></span><span style="font-family:Verdana;">Vaccination is very often dela...<strong>Introduction</strong><span style="font-family:Verdana;"><strong>: </strong></span><span style="font-family:Verdana;">Vaccination is very often delayed in premature and low birth weight infants. However, timely vaccination is even more important in this population because of their increased susceptibility to infection.</span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Objective</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:;" "=""> <span style="font-family:Verdana;">To assess immunization practice and factors associated with vaccine promptness</span><span style="font-family:Verdana;"> and completeness in former preterm and low-birth-weight infants.</span></span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Methods</span></b><b><span style="font-family:Verdana;">: </span></b><span style="font-family:Verdana;">We conducted a retrospective analytical cross-sectional study (January 2017 to February 2019).</span><b><span style="font-family:Verdana;"> Main Measurement: </span></b><span style="font-family:Verdana;">Promptness and completeness at each contact, Statistical analysis was performed using R software version 3.6.2, logistic regression was used to estimate the Odds Ratio (OR) and their 95% Confidence Interval (CI).</span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Results</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:Verdana;"> We recruited 310 children aged 12 to 36 months born before 37 weeks with low birth weight, 163 (52.6%) of whom were female. Two hundred and fifty-three had received the vaccines at the indicated age, with</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">promptness rate of 81.6%, and 97.7% had completed routine immunization at 9 months. The mean age at vaccination initiation was 6 days ±</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">11 and the mean weight at vaccination initiation was 2233</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">g ±</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">494. High </span><span style="font-family:Verdana;">prematurity and very low birth weight were associated with a high rate of</span><span style="font-family:Verdana;"> vaccine delay: 61.5% [OR: 15.56;(CI: 3.22</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">118.52;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">0.002)] and 66.7% [OR: 19.19;(CI: 4.67</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">92.52;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;"><</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">0.001)] respectively. Distance > 5 km with EHC [OR: 3.48;(CI: 1.68</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">7.47;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">0.001)] was associated with poor vaccination. </span><span style="font-family:Verdana;">Women in common-law unions had the lowest vaccine readiness rate </span><span style="font-family:Verdana;">(60.6%), (OR: 3.36;CI: 1.006</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">10.70;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">0.038). The frequency of occurrence of post </span><span style="font-family:Verdana;">immunization adverse events was 24.5%, with fever type in 94.7%.</span></span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Conclusion</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:;" "=""><span style="font-family:Verdana;"> Almost all premature and/or low-birth-weight children hospitalized at Essos Hospital Center had completed routine immunization at 9 months, and the </span><span style="font-family:Verdana;">majority had received the vaccines in a timely manner. Similar</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">study</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">is</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">needed in rural area.</span>展开更多
Continuous improvements in perinatal care have resultedin increased survival of premature infants.Their immature lungs are prone to injury with mechanical ventilation and this may develop into chronic lung disease(CLD...Continuous improvements in perinatal care have resultedin increased survival of premature infants.Their immature lungs are prone to injury with mechanical ventilation and this may develop into chronic lung disease(CLD) or bronchopulmonary dysplasia.Strategies to minimize the risk of lung injury have been developed and include improved antenatal management(education,regionalization,steroids,and antibiotics),exogenous surfactant administration and reduction of barotrauma by using exclusive or early noninvasive ventilatory support.The most frequently used mode of assisted ventilation is pressure support ventilation that may lead to patientventilator asynchrony that is associated with poor outcome.Ventilator-induced diaphragmatic dysfunction or disuse atrophy of diaphragm fibers may also occur.This has led to the development of new ventilation modes including neurally adjusted ventilatory assist(NAVA).This ventilation mode is controlled by electrodes embedded within a nasogastric catheter which detect the electrical diaphragmatic activity(Edi) and transmit it to trigger the ventilator in synchrony with the patient's own respiratory efforts.This permits the patient to control peak inspiratory pressure,mean airway pressure and tidal volume.Back up pressure control(PC) is provided when there is no Edi signal and no pneumatic trigger.Compared with standard conventional ventilation,NAVA improves blood gas regulation with lower peak inspiratory pressure and oxygen requirements in preterm infants.NAVA is safe mode of ventilation.The majority of studies have shown no significant adverse events in neonates ventilated with NAVA nor a difference in the rate of intraventricular hemorrhage,pneumothorax,or necrotizing enterocolitis when compared to conventional ventilation.Future large size randomized controlled trials should be established to compare NAVA with volume targeted and pressure controlled ventilation in newborns with mature respiratory drive.Most previous studies and trials were not sufficiently large and did not include longterm patient oriented outcomes.Multicenter,randomized,outcome trials are needed to determine whether NAVA is effective in avoiding intubation,facilitating extubation,decreasing time of ventilation,reducing the incidence ofCLD,decreasing length of stay,and improving long-term outcomes such as the duration of ventilation,length of hospital stay,rate of pneumothorax,CLD and other major complications of prematurity.In order to prevent barotrauma,next generations of NAVA equipment for neonatal use should enable automatic setting of ventilator parameters in the backup PC mode based on the values generated by NAVA.They should also include an upper limit to the inspiratory time as in conventional ventilation.The manufacturers of Edi catheters should produce smaller sizes available for extreme low birth weight infants.Newly developed ventilators should also include leak compensation and high frequency ventilation.A peripheral flow sensor is also essential to the proper delivery of all modes of conventional ventilation as well as NAVA.展开更多
Background:Tobacco exposure remains a significant issue for public health,especially for pregnant women.It increases the risk for premature labor,low birth weight and small for gestational age(SGA),among other effects...Background:Tobacco exposure remains a significant issue for public health,especially for pregnant women.It increases the risk for premature labor,low birth weight and small for gestational age(SGA),among other effects.To reduce these risks,many countries have enacted public policies to curb tobacco exposure.Peru enacted anti-tobacco laws that forbid smoking in public places,require prevention text and images in products and publicity,along with restriction of sales to adults.We evaluated the effect of the implementation of this law on newborn outcomes:birth weight,prematurity and SGA.Methods:This was a quasi-experimental study that utilized data from the Peruvian Live Birth Registry.Children born to mothers from urban areas were the intervention group,while children born to mothers from rural areas were considered the control group.Only singletons with information on birth weight and gestational age,born to mothers aged 12 to 49 years were included in the study.In addition,newborns with birth weights greater than+4 standard deviations(SD)or less than−4 SD from the gestational age-specific mean were excluded.To measure the effect of legislation on birth weight we performed a difference in differences analysis.Results:A total of 2,029,975 births were included in the analysis.After adjusting for characteristics of the mother and the child,and contextual variables,the anti-tobacco law in Peru reduced the incidence of prematurity by 30 cases per 10,000 live births(95%CI:19 to 42).Conclusions:The reform had negligible effects on overall birth weights and on the incidence of SGA.This modest result suggests the need for a more aggressive fight against tobacco,prohibiting all types of advertising and promotion of tobacco products,among others measures.展开更多
文摘The mode of delivery and gestational age for very-low-birth-weight (VLBW) preterm infants are not yet well established and are constant topics of debate. Objective: To analyze the impact of delivery mode on morbidity in preterm infants weighing less than 1500 g. Results: Among 21,957 births, 81 were analyzed;53 were delivered vaginally, and 28 were delivered by cesarean section. The median maternal age, gestational age and body mass index among those delivered vaginally and by cesarean section were 20 years and 22.5 years, 27.6 weeks and 30.1 weeks, and 26.0 kg/m2 and 27.8 kg/m2, respectively. With respect to neonatal blood gas parameters, for those born vaginally and by cesarean section, the median pH was 7.32 and 7.24, the pCO2 was 41.5 mmHg and 51.1 mmHg, and the pO2 was 22.3 mmHg and 16 mmHg. The median fetal weight among those born by cesarean section and vaginally were 1180 g and 955 g, respectively. The median Apgar scores at the first and fifth minutes among those born by cesarean section and vaginally were 5.00 and 8.00 and 4.50 and 7.00, respectively. Conclusion: There was no significant difference between the results of vaginal and cesarean delivery for VLBW infants. Thus, further studies on this subject are needed.
文摘<strong>Introduction</strong><span style="font-family:Verdana;"><strong>: </strong></span><span style="font-family:Verdana;">Vaccination is very often delayed in premature and low birth weight infants. However, timely vaccination is even more important in this population because of their increased susceptibility to infection.</span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Objective</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:;" "=""> <span style="font-family:Verdana;">To assess immunization practice and factors associated with vaccine promptness</span><span style="font-family:Verdana;"> and completeness in former preterm and low-birth-weight infants.</span></span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Methods</span></b><b><span style="font-family:Verdana;">: </span></b><span style="font-family:Verdana;">We conducted a retrospective analytical cross-sectional study (January 2017 to February 2019).</span><b><span style="font-family:Verdana;"> Main Measurement: </span></b><span style="font-family:Verdana;">Promptness and completeness at each contact, Statistical analysis was performed using R software version 3.6.2, logistic regression was used to estimate the Odds Ratio (OR) and their 95% Confidence Interval (CI).</span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Results</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:Verdana;"> We recruited 310 children aged 12 to 36 months born before 37 weeks with low birth weight, 163 (52.6%) of whom were female. Two hundred and fifty-three had received the vaccines at the indicated age, with</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">promptness rate of 81.6%, and 97.7% had completed routine immunization at 9 months. The mean age at vaccination initiation was 6 days ±</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">11 and the mean weight at vaccination initiation was 2233</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">g ±</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">494. High </span><span style="font-family:Verdana;">prematurity and very low birth weight were associated with a high rate of</span><span style="font-family:Verdana;"> vaccine delay: 61.5% [OR: 15.56;(CI: 3.22</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">118.52;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">0.002)] and 66.7% [OR: 19.19;(CI: 4.67</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">92.52;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;"><</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">0.001)] respectively. Distance > 5 km with EHC [OR: 3.48;(CI: 1.68</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">7.47;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">0.001)] was associated with poor vaccination. </span><span style="font-family:Verdana;">Women in common-law unions had the lowest vaccine readiness rate </span><span style="font-family:Verdana;">(60.6%), (OR: 3.36;CI: 1.006</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">-</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">10.70;p</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">=</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">0.038). The frequency of occurrence of post </span><span style="font-family:Verdana;">immunization adverse events was 24.5%, with fever type in 94.7%.</span></span><span style="font-family:;" "=""> </span><b><span style="font-family:Verdana;">Conclusion</span></b><b><span style="font-family:Verdana;">:</span></b><span style="font-family:;" "=""><span style="font-family:Verdana;"> Almost all premature and/or low-birth-weight children hospitalized at Essos Hospital Center had completed routine immunization at 9 months, and the </span><span style="font-family:Verdana;">majority had received the vaccines in a timely manner. Similar</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">study</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">is</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">needed in rural area.</span>
文摘Continuous improvements in perinatal care have resultedin increased survival of premature infants.Their immature lungs are prone to injury with mechanical ventilation and this may develop into chronic lung disease(CLD) or bronchopulmonary dysplasia.Strategies to minimize the risk of lung injury have been developed and include improved antenatal management(education,regionalization,steroids,and antibiotics),exogenous surfactant administration and reduction of barotrauma by using exclusive or early noninvasive ventilatory support.The most frequently used mode of assisted ventilation is pressure support ventilation that may lead to patientventilator asynchrony that is associated with poor outcome.Ventilator-induced diaphragmatic dysfunction or disuse atrophy of diaphragm fibers may also occur.This has led to the development of new ventilation modes including neurally adjusted ventilatory assist(NAVA).This ventilation mode is controlled by electrodes embedded within a nasogastric catheter which detect the electrical diaphragmatic activity(Edi) and transmit it to trigger the ventilator in synchrony with the patient's own respiratory efforts.This permits the patient to control peak inspiratory pressure,mean airway pressure and tidal volume.Back up pressure control(PC) is provided when there is no Edi signal and no pneumatic trigger.Compared with standard conventional ventilation,NAVA improves blood gas regulation with lower peak inspiratory pressure and oxygen requirements in preterm infants.NAVA is safe mode of ventilation.The majority of studies have shown no significant adverse events in neonates ventilated with NAVA nor a difference in the rate of intraventricular hemorrhage,pneumothorax,or necrotizing enterocolitis when compared to conventional ventilation.Future large size randomized controlled trials should be established to compare NAVA with volume targeted and pressure controlled ventilation in newborns with mature respiratory drive.Most previous studies and trials were not sufficiently large and did not include longterm patient oriented outcomes.Multicenter,randomized,outcome trials are needed to determine whether NAVA is effective in avoiding intubation,facilitating extubation,decreasing time of ventilation,reducing the incidence ofCLD,decreasing length of stay,and improving long-term outcomes such as the duration of ventilation,length of hospital stay,rate of pneumothorax,CLD and other major complications of prematurity.In order to prevent barotrauma,next generations of NAVA equipment for neonatal use should enable automatic setting of ventilator parameters in the backup PC mode based on the values generated by NAVA.They should also include an upper limit to the inspiratory time as in conventional ventilation.The manufacturers of Edi catheters should produce smaller sizes available for extreme low birth weight infants.Newly developed ventilators should also include leak compensation and high frequency ventilation.A peripheral flow sensor is also essential to the proper delivery of all modes of conventional ventilation as well as NAVA.
基金supported by the Canadian Institutes of Health Research(CIHR)Foundation grant“Development epidemiology:identifying evidencebased interventions for improving population health and promoting health equity”.
文摘Background:Tobacco exposure remains a significant issue for public health,especially for pregnant women.It increases the risk for premature labor,low birth weight and small for gestational age(SGA),among other effects.To reduce these risks,many countries have enacted public policies to curb tobacco exposure.Peru enacted anti-tobacco laws that forbid smoking in public places,require prevention text and images in products and publicity,along with restriction of sales to adults.We evaluated the effect of the implementation of this law on newborn outcomes:birth weight,prematurity and SGA.Methods:This was a quasi-experimental study that utilized data from the Peruvian Live Birth Registry.Children born to mothers from urban areas were the intervention group,while children born to mothers from rural areas were considered the control group.Only singletons with information on birth weight and gestational age,born to mothers aged 12 to 49 years were included in the study.In addition,newborns with birth weights greater than+4 standard deviations(SD)or less than−4 SD from the gestational age-specific mean were excluded.To measure the effect of legislation on birth weight we performed a difference in differences analysis.Results:A total of 2,029,975 births were included in the analysis.After adjusting for characteristics of the mother and the child,and contextual variables,the anti-tobacco law in Peru reduced the incidence of prematurity by 30 cases per 10,000 live births(95%CI:19 to 42).Conclusions:The reform had negligible effects on overall birth weights and on the incidence of SGA.This modest result suggests the need for a more aggressive fight against tobacco,prohibiting all types of advertising and promotion of tobacco products,among others measures.