Our life at home: Photos from families inform discharge planning for medically complex children.

BACKGROUND: Infants with medical complexity are increasingly cared for at home, creating unique challenges for their caregivers. The sickest of these are those with chronic critical illness (CCI). These infants' medical fragility and resource-intensive needs puts them at increased risk for suboptimal transitions from hospital- to home-based care. It is unclear whether, and if so, to what extent clinicians gather and use knowledge of a family's home context during discharge planning. METHODS: This study is a pilot of a novel program, using Photovoice methodology, which aims to record and reflect the experience of caring for a child with CCI at home from caregivers' perspectives and to provide direct feedback to inpatient discharging clinicians, with the goal of increasing awareness of (a) the importance of home context and (b) current discharge limitations. RESULTS: Through photographs, parents described the importance of developing new routines, learning how to be a family, the impact of medical technology on nearly all aspects of everyday life, the critical role played by clinicians during the transition home, and feelings of social stigma and isolation. Clinicians, in turn, learned about gaps in discharge planning and the value of making families part of the decision-making team. They also found meaning in seeing the children they had cared for doing well at home, which subsequently bolstered enthusiasm for their job. CONCLUSIONS: Findings from this pilot study highlight the importance of understanding the lived experience of families caring for medically complex children at home and suggest that this knowledge can be used to address gaps in the transition home.

Changes in Course of Retinopathy of Prematurity from 1986 to 2013: Comparison of Three Studies in the United States.

PURPOSE: To compare infant and retinopathy of prematurity (ROP) characteristics from 3 clinical studies conducted over a 27-year period in the United States. DESIGN: Secondary analysis of results of 3 clinical studies. PARTICIPANTS: Infants with birth weight (BW) <1251 g. METHODS: Analysis of data from the Cryotherapy for Retinopathy of Prematurity (CRYO-ROP) and Early Treatment for Retinopathy of Prematurity (ETROP) trials and the primary data from the Telemedicine Approaches for the Evaluation of Acute-Phase Retinopathy of Prematurity (e-ROP) study. MAIN OUTCOME MEASURES: Infant characteristics and onset, severity, and time course of ROP. RESULTS: Across the 3 studies, mean (standard deviation) BW and mean gestational age (GA) decreased over time from CRYO-ROP (954 g [185 g], 27.9 weeks [2.2 weeks]) to ETROP (907 g [205 g], 27.4 weeks [2.2 weeks]) to e-ROP (864 g [212 g], 27.0 weeks [2.2 weeks]), with an increase in the percentage of infants enrolled weighing <750 g (15.8% CRYO, 24.9% ETROP, 33.4% e-ROP; P<0.0001). The percentage of infants who developed ROP varied only minimally (65.8% CRYO, 68.0% ETROP, 63.7% e-ROP; P = 0.003). Moderately severe ROP (defined as prethreshold or referral warranted) varied (17.8% CRYO, 12.3% ETROP, 19.4% e-ROP; P<0.0001), whereas the time of onset of any ROP did not vary (34.3 weeks CRYO, 34.1 weeks ETROP, 34.8 weeks e-ROP). CONCLUSIONS: The BW and GA of infants enrolled in ROP studies in the United States have decreased over the past 27 years, whereas ROP prevalence and onset of disease are stable.

Automatic Rejection based on Tissue Signal (ARTS) for motion-corrected quantification of cerebral venous oxygenation in neonates and older adults.

OBJECTIVE: Cerebral venous oxygenation (Yv) is a key parameter for the brain's oxygen utilization and has been suggested to be a valuable biomarker in various brain diseases including hypoxic ischemic encephalopathy in neonates and Alzheimer's disease in older adults. T2-Relaxation-Under-Spin-Tagging (TRUST) MRI is a widely used technique to measure global Yv level and has been validated against gold-standard PET. However, subject motion during TRUST MRI scan can introduce considerable errors in Yv quantification, especially for noncompliant subjects. The aim of this study was to develop an Automatic Rejection based on Tissue Signal (ARTS) algorithm for automatic detection and exclusion of motion-contaminated images to improve the precision of Yv quantification. METHODS: TRUST MRI data were collected from a neonatal cohort (N = 37, 16 females, gestational age = 39.12 ± 1.11 weeks, postnatal age = 1.89 ± 0.74 days) and an older adult cohort (N = 223, 134 females, age = 68.02 ± 9.01 years). Manual identification of motion-corrupted images was conducted for both cohorts to serve as a gold-standard. 9.3% of the images in the neonatal datasets and 0.4% of the images in the older adult datasets were manually identified as motion-contaminated. The ARTS algorithm was trained using the neonatal datasets. TRUST Yv values, as well as the estimation uncertainty (ΔR2) and test-retest coefficient-of-variation (CoV) of Yv, were calculated with and without ARTS motion exclusion. The ARTS algorithm was tested on datasets of older adults: first on the original adult datasets with little motion, and then on simulated adult datasets where the percentage of motion-corrupted images matched that of the neonatal datasets. RESULTS: In the neonatal datasets, the ARTS algorithm exhibited a sensitivity of 0.95 and a specificity of 0.97 in detecting motion-contaminated images. Compared to no motion exclusion, ARTS significantly reduced the ΔR2 (median = 3.68 Hz vs. 4.89 Hz, P = 0.0002) and CoV (median = 2.57% vs. 6.87%, P = 0.0005) of Yv measurements. In the original older adult datasets, the sensitivity and specificity of ARTS were 0.70 and 1.00, respectively. In the simulated adult datasets, ARTS demonstrated a sensitivity of 0.91 and a specificity of 1.00. Additionally, ARTS significantly reduced the ΔR2 compared to no motion exclusion (median = 2.15 Hz vs. 3.54 Hz, P < 0.0001). CONCLUSION: ARTS can improve the reliability of Yv estimation in noncompliant subjects, which may enhance the utility of Yv as a biomarker for brain diseases.

Effects of fetal haemoglobin on systemic oxygenation in preterm infants and the development of retinopathy of prematurity PacIFiHER Report No. 2.

BACKGROUND/AIMS: Fetal haemoglobin (HbF) has an oxyhaemoglobin dissociation curve that may affect systemic oxygenation and the development of retinopathy of prematurity (ROP). The study aim is to characterise the effects of HbF levels on systemic oxygenation and ROP development. METHODS: Prospective study conducted from 1 September 2017 through 31 December 2018 at the Johns Hopkins NICU. Preterm infants with HbF measured at birth, 31, 34 and 37 weeks post-menstrual age (PMA), complete blood gas and SpO2 recorded up to 42 weeks PMA, and at least one ROP exam were included. RESULTS: Sixty-four preterm infants were enrolled. Higher HbF was associated with significantly higher SpO2, lower PCO2, lower FiO2 from birth to 31 weeks PMA and 31 to 34 weeks PMA (rs=0.51, rs=-0.62 and rs=-0.63; p<0.0001 and rs=0.71, rs=-0.58 and rs=-0.79; p<0.0001, respectively). To maintain oxygen saturation goals set by the neonatal intensive care unit, higher median FiO2 was required for HbF in the lowest tercile from birth compared with HbF in the highest tercile to 31 weeks and 31 to 34 weeks PMA; FiO2=35 (21-100) versus 21 (21-30) p<0.006 and FiO2=30 (28-100) versus 21 (21-30) p<0.001, respectively. Preterm infants with ROP had poorer indices of systemic oxygenation, as measured by median levels of SpO2 and PCO2, and lower levels of HbF (p<0.039 and p<0.0001, respectively) up to 34 weeks PMA. CONCLUSION: Low HbF levels correlated with poor oxygenation indices and increased risk for ROP. O2 saturation goals to prevent ROP may need to incorporate relative amount of HbF.

Home values and experiences navigation track (HomeVENT): Supporting decisions about pediatric home ventilation.

Objective: To pilot feasibility and acceptability of HomeVENT, a systematic approach to family-clinician decision-making about pediatric home ventilation. Methods: Parents and clinicians of children facing home ventilation decisions were enrolled at 3 centers using a pre/post cohort design. Family interventions included: 1) a website describing the experiences of families who previously chose for and against home ventilation 2) a Question Prompt List (QPL); 3) in-depth interviews exploring home life and values. Clinician HomeVENT intervention included a structured team meeting reviewing treatment options in light of the family's home life and values. All participants were interviewed one month after the decision. Results: We enrolled 30 families and 34 clinicians. Most Usual Care (14/15) but fewer Intervention (10/15) families elected for home ventilation. Families reported the website helped them consider different treatment options, the QPL promoted discussion within the family and with the team, and the interview helped them realize how home ventilation might change their daily life. Clinicians reported the team meeting helped clarify prognosis and prioritize treatment options. Conclusions: The HomeVENT pilot was feasible and acceptable. Innovation: This systematic approach to pediatric home ventilation decisions prioritizes family values and is a novel method to increase the rigor of shared decision-making in a rushed clinical environment.

"What Would Give Her the Best Life?": Understanding Why Families Decline Pediatric Home Ventilation.

Background: Families who must decide about pediatric home ventilation rely on the clinicians who counsel them for guidance. Most studies about pediatric home ventilation decisions focus on families who opt for this intervention, leaving much unknown about the families who decline. Objective: To describe the rationales of families who decline home ventilation. Design: Semi-structured interview study. Setting/Subjects: We interviewed 16 families in hospitals across 3 U.S. states, identified by their clinicians as previously deciding to not pursue home ventilation via tracheostomy within the past five years. Measurements: Targeted content and narrative analyses were used to understand family intentions and reasons for declining. Results: The clinical and social context varied among the 16 families in this study. Families' intentions in saying "no" fell into two categories: (1) definitive "No": Families who stood firm on in their decision and (2) contingent "No": Families who may consider this in the future. Families described four reasons why their child did not receive home ventilation: (1) concern about medical impacts, (2) concern about physical and/or communication restrictions, (3) concern that there would be no clear health benefit, and (4) concern about no clear meaningful life. Most families mentioned all four reasons, but concern about no clear meaningful life predominated. Conclusions: Though these families did not see home ventilation as an appropriate option, each reported a complex interplay of intentions behind and reasons for declining. Clinicians who counsel families about home ventilation could share the reasons that families commonly decline this intervention to facilitate a balanced discussion.

Zebrafish as a cancer model system.

The zebrafish, with its combination of forward genetics and vertebrate biology, has great potential as a cancer model system.

Lower foetal haemoglobin levels at 31- and 34-weeks post menstrual age is associated with the development of retinopathy of prematurity : PacIFiHER Report No. 1 PacIFiHER Study Group (Preterm Infants and Fetal Haemoglobin in ROP).

BACKGROUND/OBJECTIVES: Previous studies have suggested that lower mean foetal haemoglobin (HbF) levels is associated with an increased risk for developing retinopathy of prematurity (ROP). Lower HbF levels may lead to high oxygen exposure to the developing retina thereby increasing the risk of acute ROP. In this study, we characterize the temporal relationship of HbF levels and the development of ROP. SUBJECTS/METHODS: This is a single institution prospective observational cohort study. Preterm infants (born <31 weeks gestational age or <1500 g) with HbF measured at birth (cord blood), 31-, 34-, and 37-weeks post menstrual age (PMA); and at least one ROP exam, were enrolled. RESULTS: A total of 60 preterm infants (28 females, 47%) were enrolled. At 31-, 34-, 37-weeks PMA, infants with ROP (mild = Type 2 or less severe and severe = Type 1 ROP) had statistically lower percentages of HbF than infants with no ROP (28.2 ± 15 and 9.7 ± 2.9 vs 67.1 ± 29.6; p < 0.0001; 23.3 ± 14.7 and 32.5 vs 60.1 ± 25; p < 0.005; 31.9 ± 15.8 and 41.6 vs 60.2 ± 20.0; p < 0.0019). Infants with HbF levels in the lowest tercile at 31-weeks PMA were 7.6 times more likely to develop mild and severe ROP (95% CI 2.1-24.0, p value = 0.0006) and this risk increased to 12.3 times (95% CI: 2.6-59.0, p value = 0.0017) at 34-weeks PMA. CONCLUSIONS: Low HbF levels at 31- and 34-weeks PMA are associated with significantly increased risk of developing ROP. The decrease in HbF precedes the development of ROP and may be important in its pathogenesis.

Medical Decision-Making in Foster Care: Considerations for the Care of Children With Medical Complexity.

OBJECTIVE: To explore how medical decision-making for children with medical complexity (CMC) occurs in the context of foster care (FC). METHODS: Together with a medical FC agency, we identified 15 CMC in medical FC and recruited eligible care team members (biological and foster parents, medical FC nurses, caseworkers in medical FC/child welfare, and pediatricians) for each child. Semistructured interviews were conducted, and conventional content analysis was applied to transcripts. RESULTS: Fifty-eight interviews were completed with 2-5 care team members/child. Serious decision-making related to surgeries and medical technology was common. Themes regarding medical decision-making for CMC in FC emerged: 1) Protocol: decision-making authority is dictated by court order and seriousness of decision, 2) Process: decision-making is dispersed among many team members, 3) Representing the child's interests: the majority of respondents stated that the foster parent represents the child's best interests, while the child welfare agency should have legal decision-making authority, and 4) Perceived barriers: serious medical decision-making authority is often given to individuals who spend little time with the child. CONCLUSIONS: Medical decisions for CMC can have uncertain risk/benefit ratios. For CMC in FC, many individuals have roles in these nuanced decisions; those with ultimate decision-making authority may have minimal interaction with the child. Pediatricians can assist by clarifying who has legal decision-making authority, facilitating team communication to promote truly informed consent, and serving as a resource to decision-makers. Further research should explore how to adapt the traditional model of shared decision-making to meet the needs of this population.

Hospital Chaplains: Through the Eyes of Parents of Hospitalized Children.

BACKGROUND: Chaplain services are available in 68% of hospitals, but hospital chaplains are not yet incorporated into routine patient care. OBJECTIVES: To describe how families of hospitalized children view and utilize hospital chaplains. DESIGN: Telephone survey with 40 questions: Likert, yes/no, and short-answer responses. SUBJECTS: Parents visited by a hospital chaplain during their child's hospitalization in a tertiary care center. MEASUREMENTS: Descriptive statistics were used to characterize the sample. Nonparametrics were used to compare religious versus nonreligious parents. Regression was used to identify independent predictors of a chaplain visit positively influencing satisfaction with hospital care. RESULTS: Seventy-four parents were interviewed; most were 25-50 years old, and 75% felt their child was very sick. Children ranged from newborn to adolescence. Forty-two percent of parents requested a chaplain visit; of the 58% with an unsolicited visit, 11% would have preferred giving prior approval. Parents felt that chaplains provided religious and secular services, including family support and comfort, help with decision making, medical terminology, and advocacy. Chaplains helped most parents maintain hope and reduce stress. Seventy-five percent of parents viewed chaplains as a member of the healthcare team; 38% reported that chaplains helped medical personnel understand their preferences for care and communication. Most parents (66%) felt that hospital chaplaincy increased their satisfaction with hospital care. CONCLUSION: Families play a fundamental role in the recovery of hospitalized children. Parents view hospital chaplains as members of the healthcare team and report that they play an important role in the well-being of the family during childhood hospitalization. Chaplains positively influence satisfaction with hospital care.

Intervention at the border of viability: perspective over a decade.

OBJECTIVE: To investigate prenatal management and outcome of infants born at the border of viability during 2 periods, 2001 to 2003 (late epoch) and 1993 to 1995 (early epoch). DESIGN: Cohort study. SETTING: Single academic, high-risk perinatal referral center. PARTICIPANTS: All 160 women admitted to labor and delivery with a live fetus who delivered at an estimated gestational age of 220/7 weeks to 246/7 weeks. MAIN OUTCOME MEASURES: Prenatal management and time between maternal admission and delivery or death of the fetus, infant resuscitation efforts, neonatal intensive care unit interventions, time of death, and morbidities in survivors. RESULTS: Mothers in both epochs were of similar age, race, and duration of pregnancy at hospital admission. Compared with the early epoch, women during the late epoch were more likely to be transported to a higher level of care (relative risk [RR], 2.01; 95% confidence interval [CI], 1.58-2.57) and receive sonographic surveillance (RR, 1.48; 95% CI, 1.07-2.04), antibiotics (RR, 1.60; 95% CI, 1.10-2.33), and antenatal steroids (RR, 1.61; 95% CI, 1.22-2.12). Life-sustaining interventions were provided for infants admitted to the neonatal intensive care unit more frequently during the late epoch than the early epoch, including high-frequency ventilation (RR, 3.57; 95% CI, 1.93-6.61), chest tubes (RR, 1.44; 95% CI, 1.06-1.94), dopamine administration (RR, 2.49; 95% CI, 1.24-4.97), and steroid administration for blood pressure support (RR, 2.18; 95% CI, 1.60-2.92). Gestational age-specific mortality was the same in the 2 epochs. CONCLUSIONS: More interventions were provided for infants born at 22 to 24 weeks' gestation in the late epoch than the early epoch. Despite these changes in management, there has been no reduction in mortality in more than a decade.

A mutation in separase causes genome instability and increased susceptibility to epithelial cancer.

Proper chromosome segregation is essential for maintenance of genomic integrity and instability resulting from failure of this process may contribute to cancer. Here, we demonstrate that a mutation in the mitotic regulator separase is responsible for the cell cycle defects seen in the zebrafish mutant, cease&desist (cds). Analysis of cds homozygous mutant embryos reveals high levels of polyploidy and aneuploidy, spindle defects, and a mitotic exit delay. Carcinogenesis studies demonstrated that cds heterozygous adults have a shift in tumor spectrum with an eightfold increase in the percentage of fish bearing epithelial tumors, indicating that separase is a tumor suppressor gene in vertebrates. These data strongly support a conserved cross-species role for mitotic checkpoint genes in genetic stability and epithelial carcinogenesis.

DTL/CDT2 is essential for both CDT1 regulation and the early G2/M checkpoint.

Checkpoint genes maintain genomic stability by arresting cells after DNA damage. Many of these genes also control cell cycle events in unperturbed cells. By conducting a screen for checkpoint genes in zebrafish, we found that dtl/cdt2 is an essential component of the early, radiation-induced G2/M checkpoint. We subsequently found that dtl/cdt2 is required for normal cell cycle control, primarily to prevent rereplication. Both the checkpoint and replication roles are conserved in human DTL. Our data indicate that the rereplication reflects a requirement for DTL in regulating CDT1, a protein required for prereplication complex formation. CDT1 is degraded in S phase to prevent rereplication, and following DNA damage to prevent origin firing. We show that DTL associates with the CUL4-DDB1 E3 ubiquitin ligase and is required for CDT1 down-regulation in unperturbed cells and following DNA damage. The cell cycle defects of Dtl-deficient zebrafish are suppressed by reducing Cdt1 levels. In contrast, the early G2/M checkpoint defect appears to be Cdt1-independent. Thus, DTL promotes genomic stability through two distinct mechanisms. First, it is an essential component of the CUL4-DDB1 complex that controls CDT1 levels, thereby preventing rereplication. Second, it is required for the early G2/M checkpoint.

Hematopoietic stem cell fate is established by the Notch-Runx pathway.

Identifying the molecular pathways regulating hematopoietic stem cell (HSC) specification, self-renewal, and expansion remains a fundamental goal of both basic and clinical biology. Here, we analyzed the effects of Notch signaling on HSC number during zebrafish development and adulthood, defining a critical pathway for stem cell specification. The Notch signaling mutant mind bomb displays normal embryonic hematopoiesis but fails to specify adult HSCs. Surprisingly, transient Notch activation during embryogenesis via an inducible transgenic system led to a Runx1-dependent expansion of HSCs in the aorta-gonad-mesonephros (AGM) region. In irradiated adults, Notch activity induced runx1 gene expression and increased multilineage hematopoietic precursor cells approximately threefold in the marrow. This increase was followed by the accelerated recovery of all the mature blood cell lineages. These data define the Notch-Runx pathway as critical for the developmental specification of HSC fate and the subsequent homeostasis of HSC number, thus providing a mechanism for amplifying stem cells in vivo.

Small molecules that delay S phase suppress a zebrafish bmyb mutant.

Bmyb is a ubiquitously expressed transcription factor involved in cellular proliferation and cancer. Loss of bmyb function in the zebrafish mutant crash&burn (crb) results in decreased cyclin B1 expression, mitotic arrest and genome instability. These phenotypic observations in crb mutants could be attributed to the decreased expression of cyclin B1, a cell-cycle regulatory protein that is responsible for driving cell progression from G2 through mitosis. To identify small molecules that interact with the bmyb pathway, we developed an embryo-based suppressor screening strategy. In 16 weeks we screened a diverse approximately 16,000 compound library, and discovered one previously unknown compound, persynthamide (psy, 1), that suppressed bmyb-dependent mitotic defects. Psy-treated embryos showed an S-phase delay, and knockdown of the cell-cycle checkpoint regulator ataxia telangiectasia--and Rad-related kinase (ATR) abrogated the suppression of crb. The DNA synthesis inhibitors aphidicolin (2) and hydroxyurea (3) also suppressed crb. S-phase inhibition upregulated cyclin B1 mRNA, promoting the progression of cells through mitosis. Our study demonstrates that chemical suppressor screening in zebrafish can identify compounds with cell-cycle activity and can be used to identify pathways that interact with specific cell-cycle phenotypes.

A zebrafish bmyb mutation causes genome instability and increased cancer susceptibility.

A major goal of cancer research has been to identify genes that contribute to cancer formation. The similar pathology between zebrafish and human tumors, as well as the past success of large-scale genetic screens in uncovering human disease genes, makes zebrafish an ideal system in which to find such new genes. Here, we show that a zebrafish forward genetic screen uncovered multiple cell proliferation mutants including one mutant, crash&burn (crb), that represents a loss-of-function mutation in bmyb, a transcriptional regulator and member of a putative proto-oncogene family. crb mutant embryos have defects in mitotic progression and spindle formation, and exhibit genome instability. Regulation of cyclin B levels by bmyb appears to be the mechanism of mitotic accumulation in crb. Carcinogenesis studies reveal increased cancer susceptibility in adult crb heterozygotes. Gene-expression signatures associated with loss of bmyb in zebrafish are also correlated with conserved signatures in human tumor samples, and down-regulation of the B-myb signature genes is associated with retention of p53 function. Our findings show that zebrafish screens can uncover cancer pathways, and demonstrate that loss of function of bmyb is associated with cancer.