2 Agosto 2001
Order this document
BMJ 2001 Jun 30;322(7302):1562
Publication Types:
PMID: 11431288, UI: 21324162
Pediatrics 2001 Apr;107(4):648-55
Catholic Health Partners-Saint Joseph Hospital, Chicago, Illinois, USA.
OBJECTIVE: The national Neonatal Resuscitation Program (NRP), started in 1987, provided training to hospital delivery room personnel to standardize knowledge and skills to reduce neonatal morbidity and mortality and increase successful resuscitation during the first few critical minutes after birth. The Apgar score continues to be used as the best established index of immediate postnatal health. The purpose of this study was to evaluate the impact of the NRP instruction in Illinois hospitals by examining Apgar scores among high-risk infants who are likely to benefit from the NRP. METHODS: A retrospective 3-time period cohort design was used (before the introduction of the NRP, 1985-1988; transition when NRP training occurred, 1989-1990; and after NRP training was completed at least once for some delivery room personnel in each Illinois hospital, 1991-1995). Illinois computerized birth certificate files on a selected group of 636 429 high-risk neonates provided information on Apgar scores and maternal characteristics. The American Academy of Pediatrics provided instructor lists to determine when NRP training started and when it was fully implemented in Illinois. Illinois Department of Public Health provided data to categorize hospitals into levels based on type and intensity of neonatal services (Level I, II, II+, III). High-risk neonates were defined as meeting 1 of the following criteria: maternal age <20 years old or >35 years old, birth weight <2500 g or >4000 g, presence of a maternal medical risk factor, and no prenatal care or prenatal care started after the first trimester. Several exclusion criteria were applied including the following: birth records with missing data, multiple birth or congenital anomaly, and hospital information that indicate no birth deliveries in 1 of the 11 study years or delivery outside of a hospital. One-minute and 5-minute Apgar scores were divided into categories for analysis (0-3, 4-6, 7-10). No change or a decrease in a low (0-6) 1-minute Apgar when compared with the 5-minute Apgar was a primary measure to evaluate effect of NRP resuscitation. Variables examined included the following: race/ethnicity, maternal age, level of education, presence of maternal medical risk factor, trimester started prenatal care, complications of labor and delivery, and a low birth weight. Analysis consisted of chi(2) tests, relative risk calculations, and logistic regression to reveal independent associations with no change in low 1-minute Apgar score or continued low (0-6) 5-minute Apgar. RESULTS: A total of 636 429 high-risk birth records was selected for detailed analyses out of 2 077 533 births in Illinois between 1985 and 1995 for 193 hospitals. The number of active NRP instructors in Illinois changed dramatically during the study period; for example, 1 to 6 between 1987 and 1988 to 1096 to 1242 between 1991 and 1995. The percentage of neonates reported to have low (<7) 1-minute Apgar score decreased in 1991 to 1995 overall and for each of 4 hospital levels. Overall and by hospital level, there was a statistically significant lower proportion of high-risk newborns who showed a decrease or no change in their 5-minute Apgar scores after the NRP instruction. After adjusting for several maternal characteristics, logistic regression analysis revealed that high-risk newborns with a low 1-minute Apgar were more likely to increase their 5-minute Apgar after the NRP instruction in 1991 to 1995. Additional analyses indicated that very low birth weight and low birth weight newborns benefited the most from NRP instruction. CONCLUSION: Although previous research has shown that the NRP instruction improves knowledge and skill among health care personnel in the delivery room, both short-term and long-term, there has been little evidence to demonstrate NRP impact on infant morbidity. Several strategies were used in this study to control for bias and to adjust for secular trends in decreased infant morbidity during the study period. This study demonstrated sufficient support for the hypothesis that a significant improvement occurred among neonates in their Apgar score after the NRP instruction in Illinois. Empirical support is provided for the clinical effectiveness of NRP instruction.
PMID: 11335738, UI: 21267183
Pediatrics 2001 Apr;107(4):638-41
Department of Pediatrics, McGill University, Montreal, Quebec, Canada. kbarri@po-box.mcgill.ca
OBJECTIVE: To determine whether noninvasive, nasal synchronized intermittent mandatory ventilation (nSIMV) improves the likelihood that very low birth weight infants will be successfully extubated. METHODS: Infants of <1251-g birth weight who were due to be extubated before 6 weeks of age were eligible once they were receiving <35% oxygen and were on a ventilator rate of <18 breaths per minute (bpm). Extubation was performed following intravenous loading with aminophylline, after a successful trial of 12 hours of endotracheal synchronized intermittent mandatory ventilation at a rate of 8. Infants were randomized to either nasal continuous positive airway pressure (nCPAP) at 6 cm H(2)O or nSIMV after extubation. nSIMV was commenced at a rate of 12 bpm with pressure on the ventilator set to achieve a delivered pressure of at least 12 cm H(2)O and a peak end expiratory pressure of 6 cm H(2)O. Continuous recording for diagnosis of apnea was performed for 72 hours after extubation. Objective criteria for failure of extubation were as follows: a PaCO(2) >70; FIO(2) >0.7; or severe recurrent apnea (>2 apneas requiring intermittent positive-pressure ventilation in 24 hours or >6 apneas >20 seconds per day). The study ended after 72 hours postextubation or when infants satisfied failure criteria. A sample size of 54 was determined by power analysis. RESULTS: Mean birth weight (831 standard deviation [SD]: 193 g) and gestation (26.3 SD: 1.8 weeks) did not differ between groups. Mean age at extubation was 7.6 (SD: 9.7) days, range 1 to 40 days. The nSIMV group had a lower incidence of failed extubation 4/27 compared with the continuous positive airway pressure group, 12/27. This was attributable to both a decreased incidence of apnea and a decreased incidence of hypercarbia. There was no increase in the incidence of abdominal distension or feeding intolerance. DISCUSSION: nSIMV is effective in preventing extubation failure in very low birth weight infants in the first 72 hours after extubation. Noninvasive ventilation may have other roles in the care of the very low birth weight infant.
PMID: 11335736, UI: 21267181
the above reports in Macintosh PC UNIX Text HTML format documents on this page through Loansome Doc