Characterization of the triage process in neonatal intensive care

Seven years later: state neonatal risk-appropriate care policy consistency with the 2012 American Academy of Pediatrics Policy

OBJECTIVE

To assess consistency of state neonatal risk-appropriate care policies with the 2012 AAP policy seven years post-publication.

STUDY DESIGN

Systematic, web-based review of all publicly available 2019 state neonatal levels of care policies. Information on infant risk (gestational age, birth weight), technology and equipment capabilities, and availability of specialty staffing used to define neonatal levels of care was extracted for review.

RESULT

Half of states (50%) had a neonatal risk-appropriate care policy. Of those states, 88% had language consistent with AAP-defined Level I criteria, 80% with Level II, 56% with Level III, and 55% with Level IV. Comparing policies (2014-2019), consistency increased in state policies among all levels of care with the greatest increase among level IV criteria.

CONCLUSION

States improved consistency of policy language by each level of care, though half of states still lack policy to provide minimum standards of care to the most vulnerable infants.

The Term Newborn: Early-Onset Sepsis

The changing epidemiology of early-onset neonatal sepsis among term infants has required reappraisal of approaches to management of newborn infants at potential risk. As this is now a rare disease, new strategies for reduction in diagnostic testing and empirical treatment have been developed. Adoption and refinement of these strategies should be a priority for all facilities where babies are born.

Choosing wisely for the other 80%: What we need to know about the more mature newborn and NICU care

Although neonatal intensive unit (NICU) care is envisioned as the care of very immature infants, more than 95% of births and 80% of NICU admissions are of more mature newborns-infants born at 34 or more weeks' gestation. In spite of the size of this population there are important gaps in the understanding of their needs and optimal management as reflected by remarkably large unexplained variation in their care. The goal of this article is to describe what is known about the more mature, higher birth weight newborn population's use of NICU care and highlight important gaps in knowledge and obstacles to research. Research priorities are identified: including (1) the need for birth population based rather than NICU based studies, and (2) population specific data elements. Summary: More mature newborns-infants of 34 or more weeks' gestation-account for most NICU admissions. There are large gaps in the understanding of their needs and optimal management as reflected by large unexplained variation in their care. We enumerate these gaps in current knowledge and suggest research priorities to address them.

Decreasing Admissions to the NICU: An Official Transition Bed for Neonates

BACKGROUND

Evidence supports the need to decrease healthcare costs. One approach may be minimizing use of low-value care by reducing the number of unnecessary neonatal intensive care unit (NICU) admissions through the use of official neonatal transition beds.

PURPOSE

To evaluate whether transition beds decrease unnecessary NICU admissions and estimate the cost savings of this practice change.

METHODS

This retrospective chart review examined the records of all neonates of 350/7 weeks' gestational age and greater with birth weights of 2000 g and more admitted to a neonatal transition bed from January 1, 2017, to December 31, 2017. Outcomes evaluated were number of neonates returned to their mothers and an estimate of dollars saved for a 1-year period.

RESULTS

A total of 194 neonates were admitted to transition beds, which resulted in 144 NICU admissions averted. Respiratory distress was the most common reason for admission to transition beds. There was a statistically significant difference in length of stay in transition beds between neonates admitted to the NICU and those returned to couplet care after admission to transition beds (135.92 minutes vs 159.27 minutes; P = .047). There was no difference in gestational age based on admission to NICU or returned to couplet care (37.9 weeks vs 38 weeks; P = .772). The estimated cost savings was $3000 per neonate returned to couplet care totaling $432,000 annually.

IMPLICATIONS FOR PRACTICE

The use of neonatal transition beds is a potential strategy to decrease unnecessary NICU admissions and reduce low value care.

IMPLICATIONS FOR RESEARCH

Research regarding potential benefits of transition beds including the effect on hospital resources and low-value care at other institutions is needed. Additional research regarding potential benefits to the family including parent satisfaction and the effect of transition beds on rates of breastfeeding and skin-to-skin care is important.

Short-Term Outcomes following Standardized Admission of Late Preterm Infants to Family-Centered Care

OBJECTIVE

The study compares the short-term outcomes of late preterm infants (LPI) at an academic center in San Diego, California after a change in protocol that eliminated a previously mandatory 12-hour neonatal intensive care unit (NICU) observation period after birth.

STUDY DESIGN

This is a retrospective observational study examining all LPI born with gestational age 35 to 36^6/7 weeks between October 1, 2016 and October 31, 2017. A total of 189 infants were included in the review. Short-term outcomes were analyzed before and after the protocol change.

RESULTS

Transfers to the NICU from family-centered care (FCC) were considerably higher (23.2%) following the protocol change, compared to before (8.2%). More infants were transferred to the NICU for failed car seat tests postprotocol compared to preprotocol. Length of stay before the protocol change was 5.13 days compared to 4.80 days after.

CONCLUSION

LPI are vulnerable to morbidities after delivery and through discharge. We found an increase in failed car seat tests in LPI cared for in FCC after elimination of a mandatory NICU observation after birth. The transitions of care from delivery to discharge are key checkpoints in minimizing complications.

Neonatal management of prenatally suspected coarctation of the aorta

OBJECTIVES

(a) To determine the false-positive rate among newborns with prenatally suspected coarctation of the aorta (CoA) within the UCLA Health system, (b) to compare patient and maternal interventions and outcomes between false-positive cases and normal controls, and (c) to determine the timing of clinical presentation of CoA.

METHODS

We performed a single-center, retrospective case control study of all fetuses with suspected isolated CoA who underwent both fetal echocardiographic evaluation and subsequent delivery at UCLA between January 1, 2011, and December 31, 2018. Maternal and neonatal medical records were reviewed for demographic and clinical data, for cases of suspected CoA and for controls. A separate review of our institution's surgical database was performed to identify characteristics of all patients (neonatal and pediatric) with isolated CoA who underwent surgical repair during the same time period.

RESULTS

Among the 50 fetal cases of isolated suspected CoA who delivered at our institution, 47 patients (94%) were found to be normal (false positives). Compared with normal controls, patients with suspected CoA were more likely to have delayed maternal bonding, delayed feeding, admission to the intensive care unit, performance of neonatal echocardiograms, initiation of intravenous fluids and initiation of prostaglandin E1, and a longer length of hospital stay. Among the 38 patients undergoing CoA repair at our institution during the study period, four patients were prenatally diagnosed and no patient presented clinically with symptoms before 48 hours after delivery.

CONCLUSION

Compared with normal controls, patients with prenatally suspected coarctation are more likely to have delayed maternal bonding, delayed feeding, more frequent neonatal echocardiograms, and longer length of hospital stay. Further refinement of neonatal management may improve postnatal care.

Variation in Use by NICU Types in the United States

: media-1vid110.1542/5828370139001PEDS-VA_2018-0457Video Abstract BACKGROUND: Increased admissions of higher birth weight and less acutely ill infants to NICUs suggests that intensive care may be used inappropriately in these populations. We describe variation in use of NICU services by gestational age and NICU type.

METHODS

Using the Vermont Oxford Network database of all NICU admissions, we assessed variation within predefined gestational age categories in the following proportions: admissions, initial NICU hospitalization days, high-acuity cases ≥34 weeks' gestation, and short-stay cases ≥34 weeks' gestation. High acuity was defined as follows: death, intubated assisted ventilation for ≥4 hours, early bacterial sepsis, major surgery requiring anesthesia, acute transport to another center, hypoxic-ischemic encephalopathy or a 5-minute Apgar score ≤3, or therapeutic hypothermia. Short stay was defined as an inborn infant staying 1 to 3 days with discharge from the hospital.

RESULTS

From 2014 to 2016, 486 741 infants were hospitalized 9 657 508 days at 381 NICUs in the United States. The median proportions of admissions, initial hospitalized days, high-acuity cases, and short stays varied significantly by NICU types in almost all gestational age categories. Fifteen percent of the infants ≥34 weeks were high acuity, and 10% had short stays.

CONCLUSIONS

There is substantial variation in use among NICUs. A campaign to focus neonatal care teams on using the NICU wisely that addresses the appropriate use of intensive care for newborn infants and accounts for local context and the needs of families is needed.

Variation in NICU Admission Rates Without Identifiable Cause

OBJECTIVES

Admission to the NICU is influenced by physiologic compromise and by hospital care protocols. Providing appropriate care must be balanced with adverse consequences of NICU admission, such as interrupting maternal-infant bonding and unnecessary interventions. This study aims to determine the variation in NICU admissions in term and late preterm infants among 19 hospitals.

METHODS

We used the Consortium on Safe Labor (CSL) database to determine NICU admission rates. This database includes data from 217 442 infants aged 35 to 42 weeks within 19 US maternal delivery hospitals from 2002 to 2008. NICU admission rates were evaluated for absolute factors including, but not limited to, sepsis, asphyxia, respiratory distress, and intracranial hemorrhage, as well as relative factors, such as maternal drug use, chorioamnionitis, and infant birth weight ≤ 2500 g.

RESULTS

Percentage of infants 35 to 42 weeks' gestation admitted to the NICU without an identifiable absolute or relative cause for intensive care services ranged from 0% to 59.4% (mean, 10.8%; P < .001). Among infants 35 to 42 weeks' gestation and ≥ 2500 g, infants without absolute or relative identified cause accounted for 9.1% of total NICU days and had lower length of stays (-2.7 days; 95% confidence interval -3.4; -2.1) compared to those with an identified reason.

CONCLUSIONS

There is significant variation in admission rates among NICUs that cannot be explained by infant health conditions. Further analysis is needed to determine the cause of between-site variation and potential opportunities to refine protocols and optimize use of NICU services.

Choosing Wisely in Newborn Medicine: Five Opportunities to Increase Value

BACKGROUND

The use of unnecessary tests and treatments contributes to health care waste. The "Choosing Wisely" campaign charges medical societies with identifying such items. This report describes the identification of 5 tests and treatments in newborn medicine.

METHODS

A national survey identified candidate tests and treatments. An expert panel of 51 individuals representing 28 perinatal care organizations narrowed the list over 3 rounds of a modified Delphi process. In the final round, the panel was provided with Grading of Recommendation, Assessment, Development and Evaluation (GRADE) literature summaries of the top 12 tests and treatments.

RESULTS

A total of 1648 candidate tests and 1222 treatments were suggested by 1047 survey respondents. After 3 Delphi rounds, the expert panel achieved consensus on the following top 5 items: (1) avoid routine use of antireflux medications for treatment of symptomatic gastroesophageal reflux disease or for treatment of apnea and desaturation in preterm infants, (2) avoid routine continuation of antibiotic therapy beyond 48 hours for initially asymptomatic infants without evidence of bacterial infection, (3) avoid routine use of pneumograms for predischarge assessment of ongoing and/or prolonged apnea of prematurity, (4) avoid routine daily chest radiographs without an indication for intubated infants, and (5) avoid routine screening term-equivalent or discharge brain MRIs in preterm infants.

CONCLUSIONS

The Choosing Wisely Top Five for newborn medicine highlights tests and treatments that cannot be adequately justified on the basis of efficacy, safety, or cost. This list serves as a starting point for quality improvement efforts to optimize both clinical outcomes and resource utilization in newborn care.

Neonatal intensive care unit: predictive models for length of stay

OBJECTIVE

Hospital length of stay (LOS) is important to administrators and families of neonates admitted to the neonatal intensive care unit (NICU). A prediction model for NICU LOS was developed using predictors birth weight, gestational age and two severity of illness tools, the score for neonatal acute physiology, perinatal extension (SNAPPE) and the morbidity assessment index for newborns (MAIN).

STUDY DESIGN

Consecutive admissions (n=293) to a New England regional level III NICU were retrospectively collected. Multiple predictive models were compared for complexity and goodness-of-fit, coefficient of determination (R (2)) and predictive error. The optimal model was validated prospectively with consecutive admissions (n=615). Observed and expected LOS was compared.

RESULT

The MAIN models had best Akaike's information criterion, highest R (2) (0.786) and lowest predictive error. The best SNAPPE model underestimated LOS, with substantial variability, yet was fairly well calibrated by birthweight category. LOS was longer in the prospective cohort than the retrospective cohort, without differences in birth weight, gestational age, MAIN or SNAPPE.

CONCLUSION

LOS prediction is improved by accounting for severity of illness in the first week of life, beyond factors known at birth. Prospective validation of both MAIN and SNAPPE models is warranted.

Triage, not just for the emergency department: a discussion of the appropriate level of care for the transitioning infant

Determining the appropriate placement for infants experiencing a delay in transition or who require more intensive assessment, monitoring, and nursing care can be a challenge. Not all of these infants need to be admitted to the NICU. Since 1994, we have had a triage program to care for these infants. We define triage as a temporary (12 hours or fewer) level of care for monitoring, assessment, and intervention. This level of care is more intensive than in the newborn nursery, but the infant does not require an immediate NICU admission. Caring for these infants presents challenges in staffing, family-centered care, and reimbursement. This article shares information on the evolution of our triage program, its benefits to infants and their families, and how it is integrated into our NICU practices.

The effect of maternal age on adverse birth outcomes: does parity matter?

OBJECTIVES

To examine the effect of parity on the association between older maternal age and adverse birth outcomes, specifically stillbirth, neonatal death, preterm birth, small for gestational age, and neonatal intensive care unit admission.

METHODS

We conducted a retrospective cohort study of singleton births in British Columbia between 1999 and 2004. In the cohort, 69 023 women were aged 20 to 29, 25 058 were aged 35 to 39, and 4816 were aged 40 and over. Perinatal risk factors, obstetric history, and birth outcomes were abstracted from the British Columbia Perinatal Database Registry. Logistic regression was used to calculate adjusted odds ratios (aOR) and 95% confidence intervals for adverse outcomes in the two older age groups compared with the young control subjects.

RESULTS

Compared with younger control subjects, women aged 35 to 39 years had an aOR of stillbirth of 1.5 (95% CI 1.2 to 1.9) and women aged >or= 40 years also had an aOR of 1.5 (95% CI 1.0 to 2.4). The aOR for NICU admission was 1.2 (95% CI 1.0 to 1.3) in women aged 35 to 39 years and 1.4 (95% CI 1.1 to 17) in women aged >or= 40 years compared with younger control subjects. The risk of preterm birth and SGA differed by parity. The aOR for preterm birth compared with younger primiparas was 1.5 (95% CI 1.4 to 1.7) for women aged 35 to 39 years and 1.6 (95% CI 1.3 to 2.0) for women aged >or= 40 years. In multiparas the aOR for preterm birth was 1.1 (95% CI 1.1 to 1.2) in women aged 35 to 39 and 1.3 (95% CI 1.1 to 1.5) in women >or= 40 years. The aOR for SGA in primiparas was 1.2 (95% CI 1.1 to 1.4) for women aged 35 to 39 and 1.4 (95% CI 1.1 to 1.7) for women aged >or= 40 years. The risk of neonatal death was not significantly different between groups.

CONCLUSION

Older women were at elevated risk of stillbirth, preterm birth, and NICU admission regardless of parity. Parity modified the effect of maternal age on preterm birth and SGA. Older primiparas were at elevated risk for SGA, but no association between age and SGA was found in multiparas. Older primiparas were at higher risk of preterm birth than older multiparas compared with younger women.

Patient-to-nurse ratios and outcomes of moderately preterm infants

OBJECTIVE

Moderately preterm infants (30-34(6/7) weeks' gestational age) represent the largest population of NICU residents. Whether their clinical outcomes are associated with differences in NICU nurse-staffing arrangements has not been assessed. The objective of this study was to test the influence of patient-to-nurse ratios (PNRs) on outcomes of care provided to moderately preterm infants.

PATIENTS AND METHODS

Using data from a prospective, multicenter, observational cohort study of 850 moderately preterm infants from 10 NICUs in California and Massachusetts, we tested for associations between PNR and several important clinical outcomes by using multivariate random-effects models. To correct for the influence of NICU size, we dichotomized the sample into those with an average daily census of <20 or > or =20 infants.

RESULTS

Overall, we found few clinically significant associations between PNR and clinical outcomes of care. Mean PNRs were higher in large compared with small NICUs (2.7 vs 2.1; P < .001). In bivariate analyses, an increase in PNR was associated with a slightly higher daily weight gain (5 g/day), greater gestational age at discharge, any intraventricular hemorrhage, and severe retinopathy of prematurity. After controlling for case mix, NICU size, and site of care, an additional patient per nurse was associated with a decrease in daily weight gain by 24%. Other variables were no longer independently associated with PNR.

CONCLUSIONS

In this population of moderately preterm infants, the PNR was associated with a decrease in daily weight gain, but was not associated with other measures of quality. In contrast with findings in the adult intensive care literature, measured clinical outcomes were similar across the range of nurse-staffing arrangements among participating NICUs. We conclude that the PNR is not useful for profiling hospitals' quality of care delivery to moderately preterm infants.

Postnatal SNAP-II scores in neonatal intensive care unit patients: relationship to sepsis, necrotizing enterocolitis, and death

OBJECTIVE

To determine if daily SNAP-II scores (Score for Neonatal Acute Physiology) after the first day are useful in identifying neonatal intensive care unit (NICU) patients who die or develop sepsis or necrotizing enterocolitis.

STUDY DESIGN

Prospective data were collected on all 141 admissions to a university level III NICU over 4 months. SNAPPE-II scores were calculated from the day of admission and SNAP-II scores from subsequent hospital days. The scores were compared between those who developed events and those who did not.

RESULTS

At least 64% of the daily SNAP-II scores on the day of and the preceding 4 days from the event were 0. Admission SNAPPE-II scores correlated with length of stay (r = 0.44, p < 0.01) but patient average SNAP-II did not (r = 0.02, p > 0.5).

CONCLUSIONS

SNAP-II scores from after the first day of life did not accurately assess or predict neonatal morbidity and mortality.

Neonatal intensive care unit census influences discharge of moderately preterm infants

OBJECTIVE

The timely discharge of moderately premature infants has important economic implications. The decision to discharge should occur independent of unit census. We evaluated the impact of unit census on the decision to discharge moderately preterm infants.

DESIGN/METHODS

In a prospective multicenter cohort study, we enrolled 850 infants born between 30 and 34 weeks' gestation at 10 NICUs in Massachusetts and California. We divided the daily census from each hospital into quintiles and tested whether discharges were evenly distributed among them. Using logistic regression, we analyzed predictors of discharge within census quintiles associated with a greater- or less-than-expected likelihood of discharge. We then explored parental satisfaction and postdischarge resource consumption in relation to discharge during census periods that were associated with high proportions of discharge.

RESULTS

There was a significant correlation between unit census and likelihood of discharge. When unit census was in the lowest quintile, patients were 20% less likely to be discharged when compared with all of the other quintiles of unit census. In the lowest quintile of unit census, patient/nurse ratio was the only variable associated with discharge. When census was in the highest quintile, patients were 32% more likely to be discharged when compared with all of the other quintiles of unit census. For patients in this quintile, a higher patient/nurse ratio increased the likelihood of discharge. Conversely, infants with prolonged lengths of stay, an increasing Score for Neonatal Acute Physiology II, and minor congenital anomalies were less likely to be discharged. Infants discharged at high unit census did not differ from their peers in terms of parental satisfaction, emergency department visits, home nurse visits, or rehospitalization rates.

CONCLUSIONS

Discharges are closely correlated with unit census. Providers incorporate demand and case mix into their discharge decisions.

Rooming-in for preterm infants: how far should we go? Five-year experience at a tertiary hospital

AIM

To determine the rate of rooming-in among preterm infants born in a tertiary hospital.

METHODS

We reviewed the records of all preterm infants born at our hospital during a 5-y period, 2000 to 2004.

RESULTS

Of the 18 953 neonates born at our institution during this time, 1356 (7.2%) were <37 wk gestational age. Considering only preterm infants with birthweight > or =1500 g, 806 (74.1%) stayed with their mothers and 282 (25.9%) were admitted to the NICU. Of all the preterm infants that initially stayed with their mothers, 42 (5.2%) needed to be transferred to the NICU. When we stratified these preterm infants according to birthweight, we found that 29% of those <1750 g were transferred to the NICU, compared to only 5% of those > or =1750 g.

CONCLUSION

Our study supports the idea that the majority of preterm infants, especially those with birthweight > or =1750 g, can safely remain near their mothers at all times during hospital stay, with both clinical and financial benefits. Neonates with birthweight <1750 g should be evaluated carefully to decide whether rooming-in is the best option. Rooming-in should be encouraged in preterm infants.

Moderately premature infants at Kaiser Permanente Medical Care Program in California are discharged home earlier than their peers in Massachusetts and the United Kingdom

OBJECTIVE

To compare gestational age at discharge between infants born at 30-34(+6) weeks gestational age who were admitted to neonatal intensive care units (NICUs) in California, Massachusetts, and the United Kingdom.

DESIGN

Prospective observational cohort study.

SETTING

Fifty four United Kingdom, five California, and five Massachusetts NICUs.

SUBJECTS

A total of 4359 infants who survived to discharge home after admission to an NICU.

MAIN OUTCOME MEASURES

Gestational age at discharge home.

RESULTS

The mean (SD) postmenstrual age at discharge of the infants in California, Massachusetts, and the United Kingdom were 35.9 (1.3), 36.3 (1.3), and 36.3 (1.9) weeks respectively (p = 0.001). Compared with the United Kingdom, adjusted discharge of infants occurred 3.9 (95% confidence interval (CI) 1.4 to 6.5) days earlier in California, and 0.9 (95% CI -1.2 to 3.0) days earlier in Massachusetts.

CONCLUSIONS

Infants of 30-34(+6) weeks gestation at birth admitted and cared for in hospitals in California have a shorter length of stay than those in the United Kingdom. Certain characteristics of the integrated healthcare approach pursued by the health maintenance organisation of the NICUs in California may foster earlier discharge. The California system may provide opportunities for identifying practices for reducing the length of stay of moderately premature infants.

Potential Substitution of Cord Blood for Infant Blood in the Neonatal Sepsis Evaluation

BACKGROUND

Evaluation of sepsis accounts for one third of all nursery triage admissions. If umbilical cord blood could be accurately substituted for infant blood, it would spare infants the discomfort of an invasive procedure and save both time and resources. While awaiting 48-hour blood culture results, we decide on clinical management based on whether the white blood cell (WBC) immature to total (I:T) granulocyte ratio is >or=0.2.

OBJECTIVES

Our goal was to assess the correlation of complete blood count (CBC), I:T ratio and blood culture results between umbilical cord and infant blood.

METHODS

We conducted a prospective cohort study comparing CBC/differential and blood culture results of paired samples of umbilical cord and infant blood from term newborns.

RESULTS

We sent 113 paired samples of cord and infant venous blood for CBC/differential and blood culture. All 113 umbilical cord and infant blood cultures were negative, yielding a false-positive blood culture rate of zero. For 92% of babies, both the cord and infant blood I:T ratio were <0.2 or both were >or=0.2. Cord and infant WBC, hematocrit and platelet counts were moderately to highly correlated.

CONCLUSION

We conclude that cord blood can be safely substituted for infant blood in routine sepsis evaluations of asymptomatic, term infants based on both the low false-positive cord blood culture rate and the significant association between high I:T ratios in cord and infant blood.

Perinatal substance abuse intervention in obstetric clinics decreases adverse neonatal outcomes

OBJECTIVE

To evaluate the effect of Early Start, a managed care organization's obstetric clinic-based perinatal substance abuse treatment program, on neonatal outcomes.

STUDY DESIGN

Study subjects were 6774 female Kaiser Permanente members who delivered babies between July 1, 1995 and June 30, 1998 and were screened by completing prenatal substance abuse screening questionnaires and urine toxicology screening tests. Four groups were compared: substance abusers screened, assessed, and treated by Early Start ("SAT," n=782); substance abusers screened and assessed by Early Start who had no follow-up treatment ("SA," n=348); substance abusers who were only screened ("S," n=262); and controls who screened negative ("C," n=5382).

RESULTS

Infants of SAT women had assisted ventilation rates (1.5%) similar to control infants (1.4%), but lower than the SA (4.0%, p=0.01) and S groups (3.1%, p=0.12). Similar patterns were found for low birth weight and preterm delivery.

CONCLUSION

Improved neonatal outcomes were found among babies whose mothers received substance abuse treatment integrated with prenatal care. The babies of SAT women did as well as control infants on rates of assisted ventilation, low birth weight, and preterm delivery. They had lower rates of these three neonatal outcomes than infants of either SA or S women.

Cost-effectiveness analysis of predischarge monitoring for apnea of prematurity

OBJECTIVE

It is standard practice to defer discharge of premature infants until they have achieved a set number of days without experiencing apnea. The duration of this period, however, is highly variable across institutions, and there is scant literature on its effectiveness or value-for-money. Our objective was to establish the economic impact of varying durations of predischarge observation for apnea of prematurity.

METHODS

Using computer simulation, we compared the alternatives of hospital monitoring for 1 to 10 days, after apparent cessation of apnea, with no monitoring and with the next longest period of monitoring. The daily probability of apnea requiring stimulation after a given number of apnea-free days was obtained from chart review of 216 infants, beginning on the day they attained both full feeds and temperature stability in an open crib. Baseline rates of survival or impairment, utilities for calculation of quality-adjusted life years (QALYs), outcomes for respiratory arrest at home, and long-run costs for neurodevelopmental impairment were derived from the literature. Hospital expenditures were obtained from itemized billing records for infants on each of the final 10 days of hospitalization and converted to costs using Medicare cost-to-charge ratios. Costs are reported in 2000 US dollars.

RESULTS

For infants born at 24 to 26 weeks' gestation, each additional day of monitoring cost from $41000 per QALY saved for the first day to >$130000 per additional QALY gained for the tenth day. Cost-effectiveness was poorer for infants who were born at gestational ages >30 weeks. Results were sensitive to the proportion of charted apneas requiring stimulation that would actually progress, without intervention, to respiratory arrest.

CONCLUSIONS

In this model, the cost-effectiveness of predischarge monitoring for apnea of prematurity declined significantly as the duration of monitoring was increased. Consideration should be given to alternative uses for resources in formulating neonatal discharge guidelines.

A critical review of cost reduction in neonatal intensive care. II. Strategies for reduction

Neonatal intensive care is extremely expensive; there is both a financial and an ethical obligation to practice efficiently. In the current era of intense cost containment in hospital care, neonatologists and hospital administrators are under pressure to find strategies for cost reduction for neonatal services. In this review, we address reducing discretionary admissions, the high costs of low-cost testing, minimizing use of selected high-cost technologies (ventilators and parenteral nutrition), shortening length of stay, and optimizing nursing allocation.

SNAP-II and SNAPPE-II: Simplified newborn illness severity and mortality risk scores

OBJECTIVES

Illness severity scores for newborns are complex and restricted by birth weight and have dated validations and calibrations. We developed and validated simplified neonatal illness severity and mortality risk scores. The primary outcome was in-hospital mortality.

STUDY DESIGN

Thirty neonatal intensive care units in Canada, California, and New England collected data on all admissions during the mid 1990s; patients moribund at birth or discharged to normal newborn care in <24 hours were excluded. Starting with the 34 data elements of the Score for Neonatal Acute Physiology (SNAP), we derived the most parsimonious logistic model for in-hospital mortality using 10,819 randomly selected Canadian cases. SNAP-II includes 6 physiologic items; to this are added points for birth weight, low Apgar score, and small for gestational age to create a 9-item SNAP-Perinatal Extension-II (SNAPPE-II). We validated SNAPPE-II on the remaining 14,610 cases and optimized the calibration.

RESULTS

In all birth weights, SNAPPE-II had excellent discrimination and goodness of fit. Area under the receiver operator characteristic curve was .91 +/- 0.01. Goodness of fit (Hosmer-Lemeshow) was 0.90.

CONCLUSIONS

SNAP-II and SNAPPE-II are empirically validated illness severity and mortality risk scores for newborn intensive care. They are simple, accurate, and robust across populations.