Relationship between sleep position and risk of extreme cardiorespiratory events.

OBJECTIVE: To determine whether infants at sleep in the prone side positions are at higher risk for an extreme cardiorespiratory event compared with infants at sleep in the supine position. STUDY DESIGN: We used a case-control study to compare sleep position, determined with an accelerometer, in 116 infants during an extreme cardiorespiratory event with that in 231 matched control subjects (2 per case) who did not experience any extreme events during monitoring. RESULTS: From calculation of adjusted ORs and 95% CIs, infants placed in the prone or side position were no more likely to experience an extreme cardiorespiratory event compared with infants at sleep in the supine position. We used conditional logistic regression to account for the matched design of the study and to adjust for potential confounders or effect-modifiers. CONCLUSION: These findings, coupled with our earlier observation that the peak incidence of severe cardiorespiratory events occurred before the peak incidence of sudden infant death syndrome, strongly suggest that the supine sleeping position decreases the risk of sudden infant death syndrome by mechanisms other than by decreasing extreme cardiorespiratory events detected by monitoring.

Longitudinal assessment of hemoglobin oxygen saturation in preterm and term infants in the first six months of life.

OBJECTIVE: To report longitudinal home recordings of hemoglobin O(2) saturation by pulse oximetry (Spo(2)) during unperturbed sleep in preterm and term infants. STUDY DESIGN: We recorded continuous pulse oximetry during the first 3 minutes of each hour of monitor use (nonevent epochs) for 103 preterm infants born at <1750 g and ≤ 34 weeks postmenstrual age (PMA), and 99 healthy term infants. RESULTS: Median baseline Spo(2) was approximately 98% for both the preterm and term groups. Episodes of intermittent hypoxemia occurred in 74% of preterm and 62% of term infants. Among infants with intermittent hypoxemia, the number of seconds/hour of monitoring <90% Spo(2) was initially significantly greater in the preterm than the term group and declined with age at a similar rate in both groups. The 75(th) to 95(th) percentiles for seconds/hour of Spo(2) <90% in preterm infants were highest at 36 weeks PMA and progressively decreased until 44 weeks PMA, after which time they did not differ from term infants. CONCLUSIONS: Clinically inapparent intermittent hypoxemia occurs in epochs unperturbed by and temporally unrelated to apnea or bradycardia events, especially in preterm infants at 36 to 44 weeks PMA.

Sowing the seeds for a career in medicine: reflections and projections.

Dr. George Lister delivered the following presentation as the Lee E. Farr Lecturer on May 8, 2011, which served as the culmination of the annual Student Research Day at Yale School of Medicine. He is the Chair of Pediatrics at the University of Texas Southwestern Medical School and Pediatrician-in-Chief at Children's Medical Center of Dallas. In his lecture to the medical students, who had just completed their research theses, Dr. Lister discusses his own work on sudden infant death syndrome (SIDS), demonstrating the complexity of clinical research and proving insight into the traits required of physician scientists. Committed to medical education and recognized by several awards for his mentorship, he ends the talk by imparting valuable advice on future physicians.

Precursors of cardiorespiratory events in infants detected by home memory monitor.

In 1,079 infants monitored for >700,000 hr at home for apnea or bradycardia, we found an association between infants having multiple events exceeding conventional or a priori defined more extreme thresholds and less favorable developmental outcome at 1 year of age than infants with few or no events. If it is necessary to prevent such events to minimize risk for developmental morbidity, there is reason to determine whether there are disturbances in advance of the apnea or bradycardia that herald their onset. In the 85 infants with at least 1 extreme event and 1 conventional event, we hypothesized that apnea and bradycardia do not occur de novo but rather are preceded by cardiorespiratory and hemoglobin O2 saturation changes. We compared recorded time intervals preceding these events, and we analyzed three preceding time intervals for each conventional and extreme event, and each non-event recording: Time-2 hr: up to 2 hr before; Time-1 hr: up to 1 hr before; and Time-75 sec: the 75 sec immediately preceding each event. O2 saturation progressively decreased preceding both conventional and extreme events, and progressive increases occurred in heart and breathing rate variability. Duration of respiratory pauses and of periodic breathing progressively increased preceding conventional events, respiratory rate variability increased immediately preceding conventional events and at 1 hr preceding extreme events, and O2 saturation decreased immediately preceding both conventional and extreme events. Thus, conventional and extreme events do not occur de novo but rather are preceded by autonomic instability of the cardiorespiratory system.

Pediatric Hospital Medicine: A Proposed New Subspecialty.

Over the past 20 years, hospitalists have emerged as a distinct group of pediatric practitioners. In August of 2014, the American Board of Pediatrics (ABP) received a petition to consider recommending that pediatric hospital medicine (PHM) be recognized as a distinct new subspecialty. PHM as a formal subspecialty raises important considerations related to: (1) quality, cost, and access to pediatric health care; (2) current pediatric residency training; (3) the evolving body of knowledge in pediatrics; and (4) the impact on both primary care generalists and existing subspecialists. After a comprehensive and iterative review process, the ABP recommended that the American Board of Medical Specialties approve PHM as a new subspecialty. This article describes the broad array of challenges and certain unique opportunities that were considered by the ABP in supporting PHM as a new pediatric subspecialty.

Factors that influence use of a home cardiorespiratory monitor for infants: the collaborative home infant monitoring evaluation.

BACKGROUND: As part of the Collaborative Home Infant Monitoring Evaluation, a home monitor was developed to record breathing, heart rate, other physiologic variables, and the time the monitor was used. OBJECTIVE: To determine the frequency of monitor use, factors that influence use, and validity of a model developed to predict use. DESIGN: We developed a model to predict monitor use using multiple linear regression analysis; we then tested the validity of this model to predict adherence for the first week of monitoring and for the subsequent 4-week period (weeks 2-5). SETTING: Clinical research centers in Chicago, Ill; Cleveland, Ohio; Honolulu, Hawaii; Los Angeles, Calif; and Toledo, Ohio. Patients Preterm infants, infants younger than 1 month with a history of autopsy-confirmed sudden infant death syndrome in a sibling, and infants with an idiopathic apparent life-threatening event were divided into 2 cohorts based on enrollment date. Main Outcome Measure Mean hours of monitor use per week. RESULTS: In cohort 1, the variables available before monitoring were only weakly associated with total hours of monitor use in weeks 2 to 5 (total model r(2) = 0.08). However, when hours of monitor use in week 1 were included as a variable to predict monitor use in weeks 2 to 5, the r(2) increased to 0.64 for hours of monitor use per week. CONCLUSIONS: Our data show that monitor use in the first week was the most important variable for predicting subsequent monitor use. The study suggests that a major focus of home monitoring should be adherence in the first week, although it remains to be tested whether this adherence can be altered.

Barriers to following the back-to-sleep recommendations: insights from focus groups with inner-city caregivers.

BACKGROUND: African American infants have a higher incidence of SIDS and increased risk of being placed in the prone position for sleep. OBJECTIVE: To determine new barriers and more information about previously identified barriers that interfere with adherence to the Back-to-Sleep recommendations among inner-city, primarily African Americans. DESIGN/METHODS: We conducted 9 focus groups with caregivers of infants and young children from women, infants, and children centers and clinics in New Haven and Boston. Themes were identified using standard qualitative techniques. RESULTS: Forty-nine caregivers participated, of whom 86% were African American, 6% were Hispanic, 4% were white, and 4% were other. Four themes were identified: 1) SAFETY: Participants chose the position for their infants based on which position they believed to be the safest. Some participants did not choose to put their infants in the supine position for sleep because they feared their infants would choke; 2) Advice: Participants relied on the advice of more experienced female family members. Health care providers were not uniformly a trusted source of advice; 3) Comfort: Participants made choices about their infants sleeping positions based on their perceptions of whether the infants appeared comfortable. Participants thought that their infants appeared more comfortable in the prone position; 4) Knowledge: Some participants had either limited or erroneous knowledge about the Back-to-Sleep recommendations. CONCLUSIONS: We identified multiple barriers to adherence to recommendations regarding infant sleep position. Data obtained from these focus groups could be used to design educational interventions aimed at improving communication about and adherence to the Back-to-Sleep recommendations.

Trends and factors associated with infant bed sharing, 1993-2010: the National Infant Sleep Position Study.

IMPORTANCE: A strong association between infant bed sharing and sudden infant death syndrome or unintentional sleep-related death in infants has been established. Occurrences of unintentional sleep-related deaths among infants appear to be increasing. OBJECTIVES: To determine the trends and factors associated with infant bed sharing from 1993 through 2010, including the association of physician advice on bed sharing. DESIGN: National Infant Sleep Position study conducted with annual telephone surveys. SETTING: The 48 contiguous states. PARTICIPANTS: Nighttime caregivers of infants born within 7 months of each survey administration. Approximately 1000 interviews were completed annually. MAIN OUTCOMES AND MEASURES: Infant bed sharing as a usual practice. RESULTS: Of 18 986 participants, 11.2% reported an infant sharing a bed as a usual practice. Bed sharing increased from 1993 (6.5%) to 2010 (13.5%). Although bed sharing increased significantly among white respondents from 1993 to 2000 (P < .001), the increase from 2001 to 2010 was not significant (P = .48). Black and Hispanic respondents reported an increase in bed sharing throughout the study period, with no difference between the earlier and later periods (P = .63 and P = .77, respectively). After accounting for the study year, factors associated with increase in infant bed sharing as a usual practice included maternal educational level of less than high school compared with college or greater (adjusted odds ratio, 1.42 [95% CI, 1.12-1.79]); black (3.47 [2.97-4.05]), Hispanic (1.33 [1.10-1.61]), and other (2.46 [2.03-2.97]) maternal race or ethnicity compared with white race; household income of less than $20,000 (1.69 [1.44-1.99]) and $20,000 to $50,000 (1.29 [1.14-1.45]) compared with greater than $50,000; living in the West (1.61 [1.38-1.88]) or the South (1.47 [1.30-1.66]) compared with the Midwest; infants younger than 8 weeks (1.45 [1.21-1.73]) or ages 8 to 15 weeks (1.31 [1.17-1.45]) compared with 16 weeks or older; and being born prematurely compared with full-term (1.41 [1.22-1.62]). Almost 46% of the participants reported talking to a physician about bed sharing. Compared with those who did not receive advice from a physician, those who reported their physicians had a negative attitude were less likely to have the infant share a bed (adjusted odds ratio, 0.66 [95% CI, 0.53-0.82]), whereas a neutral attitude was associated with increased bed sharing (1.38 [1.05-1.80]). CONCLUSIONS AND RELEVANCE: Our finding of a continual increase in bed sharing throughout the study period among black and Hispanic infants suggests that the current American Academy of Pediatrics recommendation about bed sharing is not universally followed. The factors associated with infant bed sharing may be useful in evaluating the impact of a broad intervention to change behavior.

2011 Joseph W. St Geme Jr lecture: five things I'd like to see changed in American pediatrics, five lessons I've learned.

OBJECTIVE: In response to limitations in access to subspecialty care, I present personal observations and suggestions related to education of future pediatricians regarding development of critical thinking skills, care of complex and chronically ill patients, development of empathy, and restoration of responsibility that may help ameliorate this serious problem. Toward this end, I also offer 1 approach, a 24/7 telephone consultation network, for enriching interaction of primary care providers (PCPs) and subspecialists who can potentially provide rapid access to needed advice, reduce demand for subspecialty appointments, bolster decision-making and expertise, and realign resources with need. METHODS: Data were obtained from 579 requests by PCPs for telephone consultation by subspecialists in 8 areas (including child psychiatry). RESULTS: Of calls, 27% took <5 minutes and 79% took 5 to 15 minutes. Of calls, 28% resulted in a clinic visit; 8% prompted hospital transfer, hospital admission, or referral to an emergency department; and the remaining 64% resulted in continued management by PCP with reinforcement of the plan. Assuming most inquiries would have resulted in referral to a subspecialist were there no telephone consultation, we estimated that 70% (8+64%) of consultations realigned resources with need, resulting in large saving of unnecessary clinic visits, travel, expense to families, lost days at work, or missed school. CONCLUSIONS: Development of rapid telephone consultation networks could provide increased access to care for those children in greatest need, use limited resources more efficiently, foster collegial and productive relationships between medical providers, and increase expertise of PCPs and subspecialists.

Maternal assessment of physician qualification to give advice on AAP-recommended infant sleep practices related to SIDS.

OBJECTIVE: The American Academy of Pediatrics (AAP) strongly recommends the supine-only sleep position for infants and issued 2 more sudden infant death syndrome (SIDS) reduction recommendations: avoid bed sharing and use pacifiers during sleep. In this study, we investigated the following: 1) if mothers from at risk populations rate physicians as qualified to give advice about sleep practices and 2) if these ratings were associated with reports of recommended practice. METHODS: A cross-sectional survey of mothers (N=2355) of infants aged <8 months was conducted at Women, Infants, and Children (WIC) Program centers in 6 cities from 2006 to 2008. The predictor measures were maternal rating of physician qualification to give advice about 3 recommended sleep practices and reported nature of physician advice. The dependent measures were maternal report of usage of recommended behavior: 1) "infant usually placed supine for sleep," 2) "infant usually does not share a bed with an adult during sleep," and 3) "infant usually uses a pacifier during sleep." RESULTS: Physician qualification ratings varied by topic: sleep position (80%), bed sharing (69%), and pacifier use (60%). High ratings of physician qualification were associated with maternal reports of recommended behavior: supine sleep (adjusted odds ratio [AOR] 2.1, 95% confidence interval [CI], 1.6-2.6); usually no bed sharing (AOR 1.5, 95% CI, 1.2-1.9), and usually use a pacifier during sleep (AOR 1.2, 95% CI, 1.0-1.5). CONCLUSIONS: High maternal ratings of physician qualification to give advice on 2 of the 3 recommended sleep practices targeted to reduce the risk of SIDS were significantly associated with maternal report of using these behaviors. Lower ratings of physician qualification to give advice about these sleep practices may undermine physician effectiveness in promoting the recommended behavior.

Influence of prior advice and beliefs of mothers on infant sleep position.

OBJECTIVES: To determine the relationship between the advice mothers receive about infant sleep position and the actual position they place their infants in to sleep and to understand modifiers of that relationship, especially beliefs about infant comfort and safety. DESIGN: Cross-sectional, face-to-face interviews. SETTING: Women, Infants, and Children centers in the United States from 2006 to 2008. PARTICIPANTS: A total of 2299 predominantly African American mothers of infants younger than 8 months. MAIN EXPOSURE: Advice received and beliefs about infant sleep position. OUTCOME MEASURE: Usually supine infant sleep position. RESULTS: Advice for exclusively supine infant sleep position from family (OR, 1.6; 95% CI, 1.17-2.17), doctors (OR, 2.28; 95% CI, 1.77-2.93), nurses (OR, 1.46; 95% CI, 1.15-1.84), or the media (OR, 1.54; 95% CI, 1.22-1.95) was associated with usually placing an infant supine to sleep. Additional sources of advice for exclusively supine position significantly increase the odds that an infant will be placed supine. Mothers who believe an infant is comfortable supine are more likely to place their infants on their backs to sleep (OR, 4.05; 95% CI, 2.51-6.53). Mothers who believe an infant will choke on its back are less likely to place their infants supine (OR, 0.36; 95% CI, 0.24-0.54). CONCLUSION: Among predominantly African American mothers, increasing advice for exclusively supine sleep and addressing concerns about infant comfort and choking remain critical to getting more infants on their back to sleep.

Report of colloquium I: the future of pediatric health care delivery and education--pondering imponderables to create an ideal residency in a world of critical uncertainties.

Participants of the first colloquium of the Residency Review and Redesign in Pediatrics (R(3)P) Project considered possible scenarios affecting pediatric practice over the next 15 to 20 years and speculated about the knowledge and skills that pediatricians would need to care for children, adolescents, and young adults in the future. They concluded that the imponderables and complexity of that undertaking fell into the category of a "wicked problem" with no unique solutions. The specifics of the future cannot be predicted, but the themes important to thinking about the future are clear and must be incorporated into thinking about pediatric residency education.

Trends and factors associated with infant sleeping position: the national infant sleep position study, 1993-2007.

OBJECTIVE: To determine trends and factors associated with choice of infant sleeping position. DESIGN: Annual nationally representative telephone surveys from 1993 through 2007. SETTING: Forty-eight contiguous states of the United States. PARTICIPANTS: Nighttime caregivers of infants born within the last 7 months; approximately 1000 interviews were given each year. Main Outcome Measure Whether infant is usually placed supine to sleep. RESULTS: For the 15-year period, supine sleep increased (P < .001) and prone sleep decreased (P < .001) for all infants, with no significant difference in trend by race. Since 2001, a plateau has been reached for all races. Factors associated with increased supine sleep between 1993 and 2007 included time, maternal race other than African American, higher maternal educational level, not living in Southern states, first-born infant, and full-term infant. The effect of these variables was reduced when variables related to maternal concerns about infant comfort, choking, and advice from physicians were taken into account. Between 2003 and 2007, there was no significant yearly increase in supine sleep. Choice of sleep position could be explained almost entirely by caregiver concern about comfort, choking, and advice. Race no longer was a significant predictor. CONCLUSIONS: Since 2001, supine sleep has reached a plateau, and there continue to be racial disparities. There have been changes in factors associated with sleep position, and maternal attitudes about issues such as comfort and choking may account for much of the racial disparity in practice. To decrease sudden infant death syndrome rates, we must ensure that public health measures reach the populations at risk and include messages that address concerns about infant comfort and choking.

Barriers to following the supine sleep recommendation among mothers at four centers for the Women, Infants, and Children Program.

OBJECTIVES: The risk for sudden infant death syndrome in black infants is twice that of white infants, and their parents are less likely to place them in the supine position for sleep. We previously identified barriers for parents to follow recommendations for sleep position. Our objective with this study was to quantify these barriers, particularly among low-income, primarily black mothers. DESIGN/METHODS: We conducted face-to-face interviews with 671 mothers, 64% of whom were black, who attended Women, Infants, and Children Program centers in Boston, Massachusetts, Dallas, Texas, Los Angeles, California, and New Haven, Connecticut. We used univariate analyses to quantify factors that were associated with choice of sleeping position and multivariate logistic regression to calculate adjusted odds ratios for the 2 outcome variables: "ever" (meaning usually, sometimes, or last night) put infant in the prone position for sleep and "usually" put infant in the supine position to sleep. RESULTS: Fifty-nine percent of mothers reported supine, 25% side, 15% prone, and 1% other as the usual position. Thirty-four percent reported that they ever placed infants in the prone position. Seventy-two percent said that a nurse, 53% a doctor, and 38% a female friend or relative provided source of advice. Only 42% reported that a nurse, only 36% a doctor, and only 15% a female friend or relative recommended the supine position for sleep. When a female friend or relative recommended the prone position, mothers were more likely ever to place their infants in the prone position and less likely usually to choose supine compared with those who received no advice from friends or relatives. When a doctor or a nurse recommended a nonsupine position, the mothers were less likely to choose supine compared with those who received no advice from a doctor or a nurse. Mothers who trusted the opinion of a doctor or a nurse about infant sleeping position were more likely to place their infants in the supine position. Half of the mothers believed that infants were more likely to choke when supine, and they were less likely to place their infants supine. Mothers who believed that infants are more comfortable in the prone position (36%) were more likely to place their infants prone. Twenty-nine percent believed that having their infants sleep with an adult helps prevent sudden infant death syndrome, and only 43% believed that sudden infant death syndrome is related to sleeping position. CONCLUSIONS: We identified specific barriers to placing infants in the supine position for sleep (lack of or wrong advice, lack of trust in providers, knowledge and concerns about safety and comfort) in low-income, primarily black mothers that should be considered when designing interventions to get more infants onto their back for sleep.

Brain death in children.

In 1981, the Report of the Medical Consultants on the Diagnosis of Death established guidelines for the diagnosis of brain death and, in 1995, the American Academy of Neurology published practice parameters to standardize determination of brain death. In 1987, the American Academy of Pediatrics established guidelines for determining brain death in children. Despite the establishment of these guidelines, the declaration of "death" based on the cessation of brain function remains complex and controversial. In this review are discussed the current guiding principles and the controversies in the diagnosis of brain death in children.

Outcome of coma in children.

Coma following a hypoxic-ischemic event is a serious condition and common reason for admission to the pediatric intensive care unit. Because coma has a high rate of mortality and morbidity in children, and the clinician may be unsure of the outcome very early in the course, it is important to have strategies to define prognosis. Although most studies have been conducted in adults, we review factors predicting outcome from coma of nontraumatic causes in infants and children. We consider the relation between physical findings, commonly accessible laboratory tools, and outcome, and comment on some newer techniques that may become more available for clinical purposes.