Long-term outcomes of children after solid organ transplantation

Pediatric Learning Health Networks in Solid Organ Transplantation-Engaging all Stakeholders to Achieve Health for Children Who Require Transplantation

BACKGROUND

Learning Health Networks (LHN) have evolved within medicine over the past two decades, but their integration into transplantation has been more recent.

OBJECTIVES AND METHODS

In this paper, we describe three LHNs in end-stage organ disease/transplantation, their common and unique features, and how their "actor-oriented" architecture allowed for rapid adaptation to meet the needs of their patients and practitioners during the recent COVID-19 pandemic.

RESULT

The structure and focus of the Improving Renal Outcomes Collaborative (IROC), Starzl Network for Excellence in Pediatric Transplantation (SNEPT), and the Advanced Cardiac Therapies Improving Outcomes Network (ACTION) are reviewed. We discuss the critical role of patient and family engagement, focusing on collaboration with Transplant Families. Finally, we review challenges common to the LHN concept and potential common areas of alignment to achieve the goal of more rapid and sustained progress to improve health in pediatric transplantation.

CONCLUSION

LHN in transplantation are essential to accelerate knowledge dissemination and improve outcomes.

Access to and Health Outcomes of Pediatric Solid Organ Transplantation for Indigenous Children in 4 Settler-colonial Countries: A Scoping Review

Solid organ transplantation (SOT) is considered the optimal treatment for children with end-stage organ failure; however, increased efforts are needed to understand the gap surrounding equitable access to and health outcomes of SOT for Indigenous children. This scoping review summarizes the literature on the characteristics of access to and health outcomes of pediatric SOT among Indigenous children in the settler-colonial states of Canada, Aotearoa New Zealand, Australia, and the United States. A search was performed on MEDLINE, EMBASE, PsycINFO, and CINAHL for studies matching preestablished eligibility criteria from inception to November 2021. A preliminary gray literature search was also conducted. Twenty-four studies published between 1996 and 2021 were included. Studies addressed Indigenous pediatric populations within the United States (n = 7), Canada (n = 6), Aotearoa New Zealand (n = 5), Australia (n = 5), and Aotearoa New Zealand and Australia combined (n = 1). Findings showed that Indigenous children experienced longer time on dialysis, lower rates of preemptive and living donor kidney transplantation, and disparities in patient and graft outcomes after kidney transplantation. There were mixed findings about access to liver transplantation for Indigenous children and comparable findings for graft and patient outcomes after liver transplantation. Social determinants of health, such as geographic remoteness, lack of living donors, and traditional spiritual beliefs, may affect SOT access and outcomes for Indigenous children. Evidence gaps emphasize the need for action-based initiatives within SOT that prioritize research with and for Indigenous pediatric populations. Future research should include community-engaged methodologies, situated within local community contexts, to inform culturally safe care for Indigenous children.

[Formula: see text] The multifaceted role of neuropsychology in pediatric solid organ transplant: preliminary guidelines and strategies for clinical practice

The incidence of pediatric solid organ transplantation (SOT) has increased in recent decades due to medical and surgical advances as well as improvements in organ procurement. Survival rates for pediatric kidney, liver, and heart transplantation are above 85% but patients continue to experience complex healthcare needs over their lifetime. Long-term developmental and neuropsychological sequelae are becoming increasingly recognized in this population, although preliminary work is limited and deserves further attention. Neuropsychological weaknesses are often present prior to transplantation and may be related to underlying congenital conditions as well as downstream impact of the indicating organ dysfunction on the central nervous system. Neuropsychological difficulties pose risk for functional complications, including disruption to adaptive skill development, social-emotional functioning, quality of life, and transition to adulthood. The impact of cognitive dysfunction on health management activities (e.g., medication adherence, medical decision-making) is also an important consideration given these patients' lifelong medical needs. The primary aim of this paper is to provide preliminary guidelines and clinical strategies for assessment of neuropsychological outcomes across SOT populations for pediatric neuropsychologists and the multidisciplinary medical team, including detailing unique and shared etiologies and risk factors for impairment across organ types, and functional implications. Recommendations for clinical neuropsychological monitoring as well as multidisciplinary collaboration within pediatric SOT teams are also provided.

Pharmacokinetics of Envarsus in pediatric kidney transplant recipients - phase 1 pilot conversion study

INTRODUCTION

Tacrolimus is the standard immunosuppressant for pediatric kidney transplants and is routinely administered twice daily (BD-tac). Envarsus (LCP-tac), an extended-release formulation, is approved for adults but not for pediatric patients.

METHODS

We conducted a pilot open-label phase 1 study in stable pediatric kidney transplant recipients (age < 18 at the time of study). Our primary objective was to compare the pharmacokinetics (Pk) of LCP-tac versus BD-tac. We conducted two 24-h Pk studies: pre-conversion (BD-tac) and 4 weeks post-conversion to LCP-tac. Patients were followed for 6 months, with the option to continue LCP-tac.

RESULTS

Five patients completed the study, with no returns to BD-tac. Median age was 15 years (range 11-17). LCP-tac exhibited an extended-release profile versus the bimodal profile of BD-tac. Time to maximum concentration was delayed (5 h vs. 1 h), and maximum concentration was lower (9.9 ng/mL vs. 14.4 ng/mL). Tacrolimus area under the curve (24 h) was comparable (141 ± 46.5 ng/mL vs. 164 ± 27.8 ng/mL). No new safety concerns arose. There were no rejection and no difference in eGFR at the study's end (1.5 mL/min/1.73 m2 , range - 1.7 to 2.3 mL/min/1.73 m2 ). Concentration/dose ratio was higher in LCP-tac (1.8 ± 0.64 vs. 0.8 ± 0.39). The final conversion ratio was 0.6 (BD-tac: LCP-tac).

CONCLUSION

Our pilot study confirms the extended-release Pk profile and improved absorption of LCP-tac compared to BD-tac. A larger study is needed to further evaluate the population Pk characteristics in children.

Clinical profile of re-hospitalizations in pediatric kidney and liver transplant recipients

BACKGROUND

Solid organ transplantation has evolved in recent decades, resulting in a rise in patient and graft survival. Frequent hospitalizations affect graft function, patients' health, and quality of life. This study characterizes the frequency and causes of post-transplant hospitalizations among pediatric recipients.

METHODS

This is a retrospective observational study evaluating pediatric kidney transplant recipients (KTR) and liver transplant recipients (LTR) aged 0-21 years, followed at a tertiary pediatric center in Israel from 2012 to 2017. Data were collected starting at 60 days post-transplantation. Diagnoses of admissions were based on clinical, laboratory, and radiographic findings.

RESULTS

Forty-nine KTR experienced 199 all-cause re-hospitalizations (median number of re-hospitalizations per patient - 3 (IQR [interquartile range] 1-5.5), while 351 re-hospitalizations were recorded in 56 LTR (median - 5 [IQR 2-8.8]). Median follow-up time was 2.2 years for KTR (IQR 1-3.9) and 3 years for LTR (IQR 2.1-4.1). The most common cause for hospitalization for both cohorts was infection (50.8% and 62%, respectively). Gram-negative bacteria were the most common pathogens identified in KTR, while viral pathogens were more common in LTR (51% and 57% of pathogen-identified cases, respectively).

CONCLUSIONS

This is the largest study to describe rehospitalizations for pediatric solid organ recipients. The hospital admission rate was higher in LTR in comparison to KTR. Infections were the most common cause of hospitalization throughout the whole study period in both populations. Frequent hospitalizations impose a heavy burden on patients and their families; better understanding of hospitalization causes may help to minimize their frequency.

Late effects in survivors of post-transplant lymphoproliferative disease

BACKGROUND

Treatment of post-transplant lymphoproliferative disease (PTLD) varies, with only some patients receiving chemotherapy. Concern for chemotherapy toxicities may influence treatment decisions as little is known regarding the late effects (LE) in PTLD survivors. This report characterizes LE in PTLD survivors at our institution.

PROCEDURE

Pediatric patients (0-18 years old) diagnosed with PTLD from 1990 to 2020 were examined. All patients included survived 6 months after completing chemotherapy or were 6 months from diagnosis if received no chemotherapy. Treatment with anti-CD20 antibody (rituximab) alone was not considered chemotherapy. Toxicities were classified per Common Terminology Criteria for Adverse Events Version 5.0. Chi-square tests assessed differences between categorical groups, or Fischer's exact test or the Fischer-Freeman-Halton exact test for limited sample sizes.

RESULTS

Of the 44 patients included, 24 (55%) were treated with chemotherapy. Twenty-four (55%) were alive at last follow-up. Chemotherapy was not associated with differences in survival (odds ratio [OR] 1.40, confidence interval [CI]: 0.42-4.63; p = .31). All patients experienced LE. Grade 3 toxicity or higher was experienced by 82% of patients with no difference in incidence (OR 1.20, CI: 0.27-5.80; p > .99) or median toxicity grade (3.00 vs. 4.00, p = .21) between treatment groups. Patients who received chemotherapy were more likely to experience blood and lymphatic toxicity (58% vs. 25%, p = .03) and cardiac toxicity (46% vs. 15%, p = .03), but less likely to have infections (54% vs. 85%, p = .03).

CONCLUSIONS

Survivors of PTLD experience LE including late mortality regardless of chemotherapy exposure. Further investigation to better understand LE could optimize upfront therapy for children with PTLD and improve outcomes.

Immunological Nuances and Complications of Pediatric Organ Transplant: A Narrative Review

Organ transplantation is considered an exaggerated immune state in which the body reacts in an elaborate cascade of reactions against the lifesaving graft transplanted. Unrepairable organ damage is the main indication for a pediatric patient to undergo a transplant. The host and the donor must fulfill the criteria for a successful transplant to have as few side effects as possible. There has been much-needed research in the domain of surgery of organ transplantation, thereby extending into the pediatric age group. This article elaborates on the post-transplant management, the immuno-biochemistry aspect, and its post-surgery treatment. The post-surgery period requires great emphasis as morbidity and mortality are highest. There is much to understand about managing transplant patients to avoid complications such as infections, hypertension, or side effects of immunosuppressive drugs. The treating clinician faces the challenges of managing the dose and frequency of immuno-suppressive medicines to prevent complications in the patients. If the dose is inadequate, there are chances of graft rejection. If the immuno-suppression is prolonged, there may be chances of infections in the patient. This article aims to summarize the mechanism of graft rejection and put forth the need for further research about creating a universal protocol for managing a patient's immune system post-transplant. The authors hope this protocol will help the clinician better understand the patient's current state and help in appropriately using immuno-suppressive drugs. It calls upon the need for a reliable and easily repeatable battery of investigations that will help solve this dilemma.

The UK kidney donor risk index poorly predicts long-term transplant survival in paediatric kidney transplant recipients

Background

The UK kidney offering scheme introduced a kidney donor risk index (UK-KDRI) to improve the utility of deceased-donor kidney allocations. The UK-KDRI was derived using adult donor and recipient data. We assessed this in a paediatric cohort from the UK transplant registry.

Methods

We performed Cox survival analysis on first kidney-only deceased brain-dead transplants in paediatric (<18 years) recipients from 2000-2014. The primary outcome was death-censored allograft survival >30 days post-transplant. The main study variable was UK-KDRI derived from seven donor risk-factors, categorised into four groups (D1-low risk, D2, D3 and D4-highest risk). Follow-up ended on 31-December-2021.

Results

319/908 patients experienced transplant loss with rejection as the main cause (55%). The majority of paediatric patients received donors from D1 donors (64%). There was an increase in D2-4 donors during the study period, whilst the level of HLA mismatching improved. The KDRI was not associated with allograft failure. In multi-variate analysis, increasing recipient age [adjusted HR and 95%CI: 1.05(1.03-1.08) per-year, p<0.001], recipient minority ethnic group [1.28(1.01-1.63), p<0.05), dialysis before transplant [1.38(1.04-1.81), p<0.005], donor height [0.99 (0.98-1.00) per centimetre, p<0.05] and level of HLA mismatch [Level 3: 1.92(1.19-3.11); Level 4: 2.40(1.26-4.58) versus Level 1, p<0.01] were associated with worse outcomes. Patients with Level 1 and 2 HLA mismatches (0 DR +0/1 B mismatch) had median graft survival >17 years regardless of UK-KDRI groups. Increasing donor age was marginally associated with worse allograft survival [1.01 (1.00-1.01) per year, p=0.05].

Summary

Adult donor risk scores were not associated with long-term allograft survival in paediatric patients. The level of HLA mismatch had the most profound effect on survival. Risk models based on adult data alone may not have the same validity for paediatric patients and therefore all age-groups should be included in future risk prediction models.

The experiences of adolescent solid organ transplantation recipients, parents, and healthcare professionals in healthcare transition: A qualitative systematic review

PROBLEM

The transition from paediatric-centred to adult healthcare services in adolescent solid organ transplantation recipients is a period of increased risk and vulnerability, the issues related to healthcare transition have become key concerns to the healthcare community.

ELIGIBILITY CRITERIA

Qualitative studies of any design and qualitative components of mixed method studies that explored the experiences of healthcare transition among adolescent solid organ transplant recipients, parents, and healthcare professionals were included.

SAMPLE

Nine articles were finalised and included in the review.

METHODS

A systematic review of qualitative studies was conducted. Databases searched were Scopus, PsycINFO, EMBASE, Web of Science, PubMed, CINAHL and ProQuest Dissertations and Theses. Studies published between the inception of respective database and December 2022 inclusive were considered. A three-step inductive thematic synthesis method outlined by Thomas and Harden was used to form descriptive themes and the 10-item Joanna Briggs Institute Critical Appraisal Checklist was utilised to appraise the quality of included articles.

RESULTS

Two hundred and twenty studies were screened, and 9 studies published between 2013 and 2022 were included. Five analytical themes were generated: 'the struggle of being an adolescent with a transplant'; 'perceptions of transition'; 'the role of parents'; 'lack of transition readiness' and 'the need for better support'.

CONCLUSIONS

Adolescent solid organ transplant recipients, parents, and healthcare professionals faced multiple challenges in the healthcare transition.

IMPLICATIONS

Future interventions and health policies should provide targeted intervention strategies that address the barriers present in the healthcare transition to facilitate the optimization of the youth healthcare transition.

Long-term mortality in pediatric solid organ recipients-A nationwide study

BACKGROUND

The present study aimed at investigating long-term mortality of patients who underwent solid organ transplantation during childhood and at identifying their causes of death.

METHODS

A cohort of 233 pediatric solid organ transplant recipients who had a kidney, liver, or heart transplantation between 1982 and 2015 in Finland were studied. Year of birth-, sex-, and hometown-matched controls (n = 1157) were identified using the Population Register Center registry. The Causes of Death Registry was utilized to identify the causes of death.

RESULTS

Among the transplant recipients, there were 60 (25.8%) deaths (median follow-up 18.0 years, interquartile range of 11.0-23.0 years). Transplant recipients' risk of death was nearly 130-fold higher than that of the controls (95% CI 51.9-1784.6). The 20-year survival rates for kidney, liver, and heart recipients were 86.1% (95% CI 79.9%-92.3%), 58.5% (95% CI 46.2%-74.1%), and 61.4% (95% CI 48.1%-78.4%), respectively. The most common causes of death were cardiovascular diseases (23%), infections (22%), and malignancies (17%). There were no significant differences in survival based on sex or transplantation era.

CONCLUSION

The late mortality is still significantly higher among pediatric solid organ recipients in comparison with controls. Cardiovascular complications, infections, and cancers are the main causes of late mortality for all studied transplant groups. These findings emphasize the cruciality of careful monitoring of pediatric transplant recipients in order to reduce long-term mortality.

Experience of ethical dilemmas among professionals working in pediatric transplantation: An international survey

BACKGROUND

Professionals working in pediatric transplantation commonly encounter complex ethical dilemmas. Most ethical research in transplantation is related to adult practice. We aimed to gain insight into ethical issues faced by transplant professionals when dealing with pediatric transplant recipients.

METHODS

A two-stage study was designed; the first part was a questionnaire completed by 190 (80%) members of the International Pediatric Transplant Association (IPTA) from over 30 different countries. This was followed by a multidisciplinary focus group that explored the preliminary data of the survey.

RESULTS

A total of 38% (56 of 149) respondents of the questionnaire had experienced an ethical issue between 2016 and 2018. Surgeons were more likely to have encountered an ethical issue as compared with physicians (60% vs. 35.7%, p = .035). Clinicians from Europe were more likely to have experienced an ethical issue in living organ donation compared with those from North America (78.9% vs. 52.5%, p = .005), with common ethical concerns being psychosocial evaluation and follow-up care of donors. The focus group highlighted the importance of a multidisciplinary approach to ethical issues.

CONCLUSION

The results of this study can direct future research into pediatric transplantation ethics with the aim of producing educational resources, policies, and ethical guidelines.

Parental Health-Related Quality of Life and Family Functioning Following Pediatric Heart Transplantation

Pediatric heart transplantation is associated with a demanding medical regime and complex care that has wide-ranging implications for parents. This cross-sectional study assessed the association between pediatric heart transplantation and parents' health-related quality of life (HRQOL) and family functioning using the PedsQL^TM Family Impact Module. The sample comprised of 108 parents of 79 heart transplant recipients. A pronounced negative impact was observed in the subscale of worry (M=52.94, sd=21.89). Higher (positive) total impact scores were significantly associated with age at transplant, time since transplantation and additional familial children. Findings support clinical recommendations to assist parents throughout the transplant trajectory.

Parenting a child with a kidney transplant-A study of everyday life experiences

BACKGROUND

Kidney transplantation in children shows excellent long-term outcomes. However, parents feel responsible for ensuring that their child adheres to complex medical interventions. The dual role - as both parent and medical caregiver - gives rise to fatigue, stress, and emotional pain. Parental and family functioning are critically important to a child's disease course, development and well-being.

OBJECTIVE

To explore the experiences and perspectives of mothers and fathers of children with a kidney transplant.

DESIGN

An explorative study using a qualitative method.

PARTICIPANTS

Twelve parents (seven mothers and five fathers) of seven children with a kidney transplant.

APPROACH

A qualitative exploratory study taking a phenomenological-hermeneutic approach.

METHOD

Semi-structured individual interviews were conducted. The data were analysed using Ricoeur's theory of narrative and interpretation on three levels: naïve reading, structural analysis, and critical interpretation and discussion.

FINDINGS

Four themes were generated: Kidney transplantation as a turning point, the importance of a close collaboration with health care professionals, being the child's voice, and managing the dual role as a parent, and medical caregiver in everyday life.

CONCLUSION

Child kidney transplantation led to a transformation in the child, on the physical, mental, and social levels; however, the child was still in need of special attention and support. Problems with the kidney graft functioning resulted in frustration and disappointment in parents. Teamwork between a child's parents became evident, in coping with the dual role as a parent and medical caregiver. Parents aimed to maintain a clear structure related to medication and disease-related treatment. A close and trustful relationship and collaboration with health care professionals were significant and included listening to the voice of the child.

Mean lifetime survival estimates following solid organ transplantation in the US and UK

AIMS

Accurately estimating mean survival after solid organ transplant (SOT) is crucial for efficient healthcare resource allocation decisions. However, registry-based post-transplant recipient survival estimates vary greatly and are incomplete. Often, the methods used in lifetime survival extrapolation may not fit complex transplant data and therefore alternative methods are required. We aimed to explore the flexible cubic spline methodology as a meaningful alternative for estimating lifetime survival following SOT.

METHODS

Survival analyses were conducted in kidney, liver, heart, and lung transplant recipients. Mean survival was estimated using flexible cubic splines on the hazard scale fitted with three knots, based on where hazards changed direction, clinical advice, and best-fit curve using Akaike and Bayesian information criterion. The tail was extrapolated when data were no longer available. Extrapolation tails were compared with general population mortality, using age-matched life table hazards, and the highest hazards were taken at all times.

RESULTS

We found that mean survival post-transplant was longest for kidney transplants (US: 22.79 years; UK: 26.58 years), followed by liver (US: 20.90 years; UK: 20.38 years), heart (US: 14.82 years; UK: 15.85 years), and lung (US: 9.28 years; UK: 9.21 years). A sensitivity analysis using two knots found differences in survival ranging from -1.30 to +4.83 years across SOTs examined.

LIMITATIONS

This study does not represent individual patient survival, survival by age groups, multiple-organ transplants, or assess factors that may impact overall or organ survival.

CONCLUSIONS

Our study estimates reflect real-world survival following SOTs and demonstrate the importance of including long-term hazards in survival estimations. These lifetime survival estimates can be used by decision-makers in situations where means are preferred over medians (e.g. population projections, budgetary estimates, and cost-effectiveness models) and can thus offer a meaningful alternative to the estimates used and accepted in current practice.

The impact of donor and recipient sex on kidney allograft survival in pediatric transplant recipients

BACKGROUND

Transplantation is widely considered the gold standard method of kidney replacement therapy. Despite compelling evidence for biological sexual dimorphisms, the role of donor and recipient sex matching in transplantation is undefined.

METHODS

The UK historical cohort study explores the impact of donor and recipient sex on allograft survival, in children receiving their first deceased donor transplant. Nationwide registry data were collected for 1316 transplant procedures performed from January 1, 1999, to December 31, 2019.

RESULTS

Male donor-male recipient transplantation occurred most frequently (35%), followed by female donor-male recipient (23%), male donor-female recipient (22%), and female donor-female recipient (20%). The median follow-up time was 7.03 years (IQR: 2.89-12.4 years), with a total of 10,326 person-years. Male donor-male recipients were associated with the highest 10-year kidney allograft survival (72.8% [95% CI 68.3-77.8]) and male donor-female recipients with the lowest (64% [95% CI 57.7-71.1]). Multivariable Cox regression demonstrated for male donor transplantation, the risk of kidney allograft failure was 1.46 times greater for female (compared to male) recipients, after adjusting for acquired recipient age, recipient/donor age at transplantation, mismatched HLA A/B/DR, waitlist time, cold ischemia time, CMV seropositivity, donor hypertension, and donor diabetes (HR 1.46 [95% CI. 1.06-2.01], p = 0.02). There was no evidence for an independent effect of donor or recipient sex in other combinations.

CONCLUSION

This study highlights the complex relationship between donor and recipient sex and pediatric kidney allograft survival, which require further mechanistic evaluation.

Improved renal allograft survival for pre-emptive paediatric renal transplant recipients in the UK

BACKGROUND

The aim of this study was to investigate whether being on dialysis at the time of renal transplantation affected renal allograft survival in paediatric renal transplant recipients (pRTRs).

METHODS

Retrospective study of UK Transplant Registry (National Health Service Blood and Transplant) data on all children (aged <18 years) receiving a kidney-only transplant from 1 January 2000 to 31 December 2015. Kaplan-Meier estimates of patient and renal allograft survival calculated and Cox regression modelling accounting for donor type. The relationship between time on dialysis and renal allograft survival was examined.

RESULTS

2038 pRTRs were analysed: 607 (30%) were pre-emptively transplanted, 789 (39%) and 642 (32%) on peritoneal dialysis and haemodialysis, respectively, at the time of transplantation. Five-year renal allograft survival was significantly better in the pre-emptively transplanted group (90.6%) compared with those on peritoneal dialysis and haemodialysis (86.4% and 85.7%, respectively; p=0.02). After accounting for donor type, there was a significantly lower hazard of 5-year renal allograft failure in pre-emptively transplanted children (HR 0.742, p=0.05). Time spent on dialysis pre-transplant negatively correlated with renal allograft survival (p=0.002). There was no significant difference in 5-year renal allograft survival between children who were on dialysis for less than 6 months and children transplanted pre-emptively (87.5% vs 90.5%, p=0.25).

CONCLUSIONS

Pre-emptively transplanted children have improved 5-year renal allograft survival, compared with children on dialysis at the time of transplantation. Although increased time spent on dialysis correlated with poorer renal allograft survival, there was no evidence that short periods of dialysis pre-transplant affected renal allograft survival.

Parents' Experiences of Their Child's Solid-Organ Transplant: A Meta-Ethnography of Qualitative Studies

OBJECTIVE

The aim of this paper was to conduct a systematic review and meta-ethnography of qualitative studies examining the experiences of parents adjusting to life after the solid organ transplant (SOT) of their child.

METHODS

A systematic review of the literature was conducted to identify qualitative studies that examined this topic. The search retrieved 4,964 studies to review against inclusion criteria. A total of 21 studies were included in the meta-ethnography. A reciprocal translation was conducted to compare themes identified in each study. A line of argument synthesis was then conducted in order to integrate the similarities and differences between all of the studies into a new interpretative context.

RESULTS

The synthesis identified four themes: (a) adjusting to life after transplant, (b) factors that facilitate adjustment, (c) factors that disrupt adjustment, and (d) changes caused by transplant. As a result of the synthesis, a new interpretation of parents' experiences of adjusting to life after the SOT of their child was constructed. A summary figure is presented.

CONCLUSION

This review found that while parents may struggle to adapt to life post-transplant and the demands of caring for their child, the experience can also result in the development of new skills, a new appreciation for life, and viewing the self in a more positive manner. A better understanding of parental experiences will promote the development of more effective interventions for the adjustment of parents and families to post-transplant life.

Evolution of pediatric gastrointestinal ulcer disease: Is acute surgical intervention relevant?

BACKGROUND

There is a lack of contemporary data about pediatric gastrointestinal ulcer disease. We hypothesized that ulcers found in immunosuppressed children were more likely to require surgical intervention.

METHODS

All children <21 years (n = 129) diagnosed with ulcers at a quaternary hospital from 1990 to 2019 were retrospectively reviewed. Clinical findings and pertinent information were collected.

RESULTS

Of 129 cases, 19 (14.7%) were immunosuppressed. Eight were post-transplant; four were diagnosed with post-transplant lymphoproliferative disease (PTLD).  Eight were associated with cancer. Three were both.  Three of 19 immunosuppressed and 28/110 immunocompetent patients were taking acid suppression therapy. Nine immunosuppressed patients required surgical intervention, including all PTLD cases, compared to 14 immunocompetent (47.3% vs 16.4%, p < 0.01). Five patients had duodenal perforation, two had multiple small bowel perforations, and two had uncontrolled bleeding. Of 9/19 immunosuppressed patients, surgical complications included bleeding (n = 7), sepsis (n = 2), ostomy reoperation/readmissions (n = 2), and death within 30 days (n = 2). Two/eighteen immunocompetent patients had bleeding complications.

CONCLUSION

Surgical treatment for ulcers remains relevant for pediatric patients. Immunosuppressed patients have more complications, longer hospital stays, and are more likely to need surgical intervention. Efforts should be made for ulcer prophylaxis with a low threshold to investigate epigastric pain in these complex patients.

LEVEL OF EVIDENCE

Prognosis Study Level III Evidence.

Examining the association of medical complications and posttraumatic stress symptoms in pediatric solid organ transplant patients and their caregivers

BACKGROUND

Post-traumatic stress symptoms (PTSS) have been reported by pediatric solid organ transplant (SOT) patients and their caregivers well after transplantation. This study examined the relationship between PTSS, medication adherence, and medical complications in SOT patients and their caregivers. A secondary aim examined the association between patient and caregiver-reported PTSS.

METHODS

Pediatric SOT patients (N = 69) and caregivers (N = 73) reported on PTSS by completing the Child PTSD Symptom Scale (patients 8-17 years) or the Impact of Events Scale-Revised (patients 18 years and older and caregivers). Patient medication adherence was assessed using the Medication Level Variability Index (MLVI). Patients were dichotomized as experiencing a post-transplant medical complication (ie, transplant-related hospital admission prior to the year completing measures of PTSS) or no complications.

RESULTS

Medication adherence was not significantly associated with patient or caregiver PTSS. A moderate effect size was found for elevated young adult and caregiver PTSS and the presence of a medical complication. Generally, the association between self-reported patient and caregiver PTSS was low.

CONCLUSIONS

The presence of elevated PTSS in young adult patients may be partially explained by the presence of proximal medical complications and more so by comorbid psychiatric diagnoses in child and adolescent patients (based on exploratory analyses). Caregivers of patients with medical complications within the past year reported higher levels of PTSS. Overall, transplantation and its associated impact on PTSS may be unique experience for patients versus caregivers. Qualitative research may further elucidate these experiences and inform future clinical interventions.

Quality of life of transplanted children and their parents: a cross-sectional study

BACKGROUND

Transplantation is a saving therapeutic that has heavy consequences. The quality of life (QoL) of transplanted children and their parents has been little studied and should help physicians better manage these patients. The objectives of the study were to assess: (1) the QoL of transplanted children and parents and compare it with that of children with other chronic conditions associated with long-term consequences, and (2) potential variables modulating the QoL.

METHODS

This cross-sectional study was performed in a multidisciplinary paediatric unit (Timone Hospital, Marseille, France). Children were less than 18 years old; had a liver, kidney or heart transplant; and had a time since transplantation of 1-10 years. Socio-demographics and clinical data were recorded from medical forms. The QoL was assessed using the VSP-A (Vécu et Santé Perçue de l'Adolescent et de l'Enfant) and the WhoQoL self-reported questionnaires.

RESULTS

Forty-five families were included (response rate: 76%). The transplanted organs were the liver for 20 children, the kidney for 15 children, and the heart for 10 children. The QoL of transplanted children reported by their parents was better than that of children with inborn errors of metabolism and similar to that of childhood leukaemia survivors. The QoL of parents of transplanted children was better than that of parents of children with inborn errors of metabolism and did not differ from French norms. The QoL did not differ according to the nature of the transplanted organ, sex or the main sociodemographic data. The main modulators decreasing QoL were residual treatment level, medications switch and the presence of another regular treatment.

CONCLUSION

Transplanted children and their families reported a fairly preserved QoL compared to children with other chronic health conditions. Special attention should be given to QoL modulators related to therapeutic management (medication switches, regular treatments) that might be amenable to improve the QoL. Trial registration Ethics committee of Aix-Marseille University, France (reference number: 2014-08-04-03, 24/4/2015; https://www.univ-amu.fr/fr/public/comite-dethique ).

Bacterial and fungal bloodstream infections in pediatric liver and kidney transplant recipients

Background

Bacterial and fungal bloodstream infections (BSI) are common after pediatric liver and kidney transplantations and associated with morbidity and mortality. However, knowledge about incidence rates, pathogen composition, and resistance patterns is limited. We aimed to describe the pattern of bacterial and fungal BSI in a cohort of pediatric liver and kidney transplant recipients.

Methods

A prospective study of 85 pediatric liver and kidney transplant recipients transplanted from 2010 to 2017 with a total of 390 person-years of follow-up. Clinical characteristics and BSI were retrieved from national registries assuring nationwide follow-up for at least 1 year. BSI incidence rates and pathogen composition were investigated and stratified by the time post-transplantation and type of transplanted organ.

Results

A total of 29 BSI were observed within the first 5 years post-transplantation with 16 different pathogens. The overall incidence rate of first BSI was 1.91 per 100 recipients per month (95% CI, 1.1–3.1) in the first year post-transplantation. The most common pathogens were Enterococcus faecium, Candida albicans, Escherichia coli, and Klebsiella pneumoniae. The pathogen composition depended on the transplanted organ with a higher proportion of BSI with Enterobacterales in kidney transplant recipients than in liver transplant recipients (67% vs. 20%, p = 0.03), while multiple pathogens were detected in the liver transplant recipients.

Conclusions

BSI were common in pediatric liver and kidney transplant recipients and the pathogen composition differed between liver and kidney transplant recipients. Guidelines for empiric antibiotic therapy should consider the type of transplanted organ as well as the local resistance patterns.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12879-021-06224-2.

Siblings of children with chronic kidney disease: A qualitative study of everyday life experiences

BACKGROUND

Chronic kidney disease in children has an impact on all family members. Healthy siblings, in particular, may experience negative psychological and emotional symptoms. Little attention has been paid to how they experience everyday family life and the impact of their sibling's disease.

OBJECTIVES

To explore perspectives on and experiences of everyday life among siblings of children with chronic kidney disease.

DESIGN

An explorative study with a qualitative method.

PARTICIPANTS

Seven siblings (7-13 years) of children with chronic kidney disease (5-16 years) were included.

APPROACH

The study took a phenomenological-hermeneutical approach. Semistructured individual interviews were conducted. The data were analysed using Ricoeur's theory of narrative and interpretation, on three levels: naïve reading, structural analysis and critical interpretation and discussion.

FINDINGS

Three themes emerged: The illness is in the background or comes to the fore, being concerned for and taking care of the sick sibling and the importance of bonds with relatives or other significant adults.

CONCLUSION

In everyday life, participants experienced that their sick sibling's illness was either in the background or came to the fore. They needed to adapt to periods of hospitalisation. They felt a need to be attentive to, take care of and have concern for the sick brother or sister. Conflicts caused feelings of loneliness; however, having knowledge about the disease provided security and meaning. Being introduced to the healthcare professionals was significant. It was important to have close relationships with friends and other adults, which gave rise to feelings of self-confidence and being supported.

Perioperative blood transfusion decreases long-term survival in pediatric living donor liver transplantation

BACKGROUND

The impact of perioperative blood transfusion on short- and long-term outcomes in pediatric living donor liver transplantation (PLDLT) must still be ascertained, mainly among young children. Clinical and surgical postoperative complications related to perioperative blood transfusion are well described up to three months after adult liver transplantation.

AIM

To determine whether transfusion is associated with early and late postoperative complications and mortality in small patients undergoing PLDLT.

METHODS

We evaluated the effects of perioperative transfusion on postoperative complications in recipients up to 20 kg of body weight, submitted to PLDLT. A total of 240 patients were retrospectively allocated into two groups according to postoperative complications: Minor complications (n = 109) and major complications (n = 131). Multiple logistic regression analysis identified the volume of perioperative packed red blood cells (RBC) transfusion as the only independent risk factor for major postoperative complications. The receiver operating characteristic curve was drawn to identify the optimal volume of the perioperative RBC transfusion related to the presence of major postoperative complications, defining a cutoff point of 27.5 mL/kg. Subsequently, patients were reallocated to a low-volume transfusion group (LTr; n = 103, RBC ≤ 27.5 mL/kg) and a high-volume transfusion group (HTr; n = 137, RBC > 27.5 mL/kg) so that the outcome could be analyzed.

RESULTS

High-volume transfusion was associated with an increased number of major complications and mortality during hospitalization up to a 10-year follow-up period. During a short-term period, the HTr showed an increase in major infectious, cardiovascular, respiratory, and bleeding complications, with a decrease in rejection complications compared to the LTr. Over a long-term period, the HTr showed an increase in major infectious, cardiovascular, respiratory, and minor neoplastic complications, with a decrease in rejection complications. Additionally, Cox hazard regression found that high-volume RBC transfusion increased the mortality risk by 3.031-fold compared to low-volume transfusion. The Kaplan-Meier survival curves of the studied groups were compared using log-rank tests and the analysis showed significantly decreased graft survival, but with no impact in patient survival related to major complications. On the other hand, there was a significant decrease in both graft and patient survival, with high-volume RBC transfusion.

CONCLUSION

Transfusion of RBC volume higher than 27.5 mL/kg during the perioperative period is associated with a significant increase in short- and long-term postoperative morbidity and mortality after PLDLT.

Substance use and abuse in pediatric transplant recipients: What the transplant provider needs to know

Substance abuse is infrequently addressed during pre- and post-transplant care. However, the significant increase in the use of nicotine- and marijuana-containing products in the general and transplant adolescent population is concerning. In addition, alcohol use/abuse remains prevalent in the US population as it is highly accessible. Pediatric transplant providers should be prepared to screen for the use of any of these substances (eg, alcohol, nicotine, marijuana, cocaine, opiates, amphetamines) and to counsel them about the dangers of substance use and abuse including the unique dangers of the substances as a transplant recipient. Formal screening tools (in children as young as 9 years) should always be used as casual assessment of substance abuse has a high failure rate. This review summarizes the substances most commonly used in adolescent transplant recipients and the approach that transplant providers should take in order to prevent, decrease, or halt use in this patient population.

Does HLA matching matter in the modern era of renal transplantation?

Children with end-stage kidney disease should be offered the best chance for future survival which ideally would be a well-matched pre-emptive kidney transplant. Paediatric and adult practice varies around the world depending on geography, transplant allocation schemes and different emphases on living (versus deceased) donor renal transplantation. Internationally, paediatric patients often have priority in allocation schemes and younger donors are preferentially allocated to paediatric recipients. HLA matching can be difficult and may result in longer waiting times. Additionally, with improved surgical techniques and modern immunosuppressive regimens, how important is the contribution of HLA matching to graft longevity? In this review, we discuss the relative importance of HLA matching compared with donor quality; and long-term patient outcomes including re-transplantation rates. We share empirical evidence that will be useful for clinicians and families to make decisions about best donor options. We discuss why living donation still provides the best allograft survival outcomes and what to do in the scenario of a highly mismatched living donor.

Clinical Outcomes of Allogeneic Ocular Surface Stem Cell Transplantation in Pediatric Patients

PURPOSE

To describe the outcomes of allograft ocular surface stem cell transplantation (OSST) and the complication profile of systemic immunosuppression (SI) in pediatric patients with limbal stem cell deficiency.

METHODS

This was a retrospective interventional case series from a single tertiary referral institution of 20 eyes from 13 patients who 1) underwent allograft OSST surgery, 2) were 18 years or less at time of OSST, and 3) received SI with 4) a minimum of 12-months follow-up. The main outcome measures were ocular surface stability, visual acuity, and SI adverse events.

RESULTS

The mean age of patients was 15.1 ± 3.2 years (range 9-18 years). The mean follow-up was 5.6 ± 5.0 years after OSST. At the last follow-up, 15 eyes (75%) had a stable ocular surface, 1 eye (5%) developed partial failure, and 4 eyes (20%) developed total surface failure. Preoperative mean logarithm of the minimum angle of resolution visual acuity 1.5 improved to 1.1 at the last follow-up (P = 0.1); when 4 eyes of 3 nonadherent patients were excluded, the results were more pronounced and statistically significant (1.5 improved to 1.0, P = 0.002). SI was tolerated well by all patients with minimal adverse events.

CONCLUSIONS

OSST provides a stable ocular surface and is a successful treatment option for pediatric patients with limbal stem cell deficiency. SI is well-tolerated with a minimal complication profile.

Does renal transplant in children with LUTD improve their bladder function?

Much is still unknown about LUT function after receiving renal graft. Graft function was the main focus of different studies discussing the same issue. However, these studies ignored the effects of the graft on lower tract function and more demand for bladder cycling and growth of the child. Therefore, we aimed at evaluating the LUT function after RT into patients with LUTD. We enrolled a retrospective cohort of 83 live renal transplant children with LUTD. The 44 patients in Group (A) had a defunctionalized bladder, and the 39 patients in Group (B) had underlying LUT pathology. All patients had clinical and urodynamic evaluation of LUT functions at least 1 year after RT. We found that the improvement in patients with impaired bladder compliance was 73% in Group (A) and 60% in Group (B), with no statistically significant difference between the study groups. In Group (B), there was statistically significant worsening of MFP (8.4%) and mean PVR (79.9%) after RT. In Group (A), mild but stable significant improvement of all clinical and urodynamic parameters was observed. Serum creatinine was significantly worse in patients with pathological LUTD compared with those with defunctionalized bladder but without significant effect on graft survival. All LUT variables seemed to have no adverse effect on graft survival except for use of CIC and augmented bladder. Incident UTI independent of LUT variables accounted for 20% of graft creatinine change.

Incidence and Risk Factors of Obesity in Childhood Solid-Organ Transplant Recipients

BACKGROUND

Obesity is a significant public health concern; however, the incidence post solid-organ transplantation is not well reported.

METHODS

This study determined the incidence and risk factors of obesity among pediatric solid-organ transplant recipients (heart, lung, liver, kidney, multiorgan) at The Hospital for Sick Children (2002-2011), excluding prevalent obesity. Follow-up occurred from transplantation until development of obesity, last follow-up, or end of study. Incidence of obesity was determined overall, by baseline body mass index, and organ group. Risk factors were assessed using Cox proportional-hazards regression.

RESULTS

Among 410 (55% male) children, median transplant age was 8.9 (interquartile range [IQR]: 1.0-14.5) years. Median follow-up time was 3.6 (IQR: 1.5-6.4) years. Incidence of obesity was 65.2 (95% confidence interval [CI]: 52.7-80.4) per 1000 person-years. Overweight recipients had a higher incidence, 190.4 (95% CI: 114.8-315.8) per 1000 person-years, than nonoverweight recipients, 56.1 (95% CI: 44.3-71.1). Cumulative incidence of obesity 5-years posttransplant was 24.1%. Kidney relative to heart recipients had the highest risk (3.13 adjusted hazard ratio [aHR]; 95% CI: 1.53-6.40) for obesity. Lung and liver recipients had similar rates to heart recipients. Those with higher baseline body mass index (z-score; 1.72 aHR; 95% CI: 1.39-2.14), overweight status (2.63 HR; 95% CI: 1.71-4.04), and younger transplant age (y; 1.18 aHR; 95% CI: 1.12-1.25) were at highest risk of obesity. Higher cumulative steroid dosage (per 10 mg/kg) was associated with increased risk of obesity after adjustment.

CONCLUSIONS

Among all transplanted children at The Hospital for Sick Children, 25% developed obesity within 5-years posttransplant. Kidney recipients, younger children, those overweight at transplant, and those with higher cumulative steroid use (per 10 mg/kg) were at greatest risk. Early screening and intervention for obesity are important preventative strategies.

Atypical malignancies after intestinal transplantation in children: A European single-centre experience

BACKGROUND

Post-transplant malignancies, that is, lymphomas, are a recognized complication in intestinal transplant recipients but are mostly secondary to EBV infection. There is an increased risk for malignancies in unusual sites in intestinal transplant recipients as compared to other solid organ transplants and the general population.

OBJECTIVE

To evaluate the incidence, course, and outcome of unusual malignancies in children after ITx.

METHODS

Retrospective analysis of children who underwent ITx for primary digestive disorders at Birmingham Children's Hospital between January 1989 and December 2017.

RESULTS

Ninety-eight intestinal transplants were performed in 90 children (49 males and 41 females) with an underlying primary digestive disorder. Median age was 2.7 years (0.6-16.2), and median weight was 14.5 kg (5.7-53.2) at the time of transplant. Within this cohort, we identified four cases of unusual malignancies at rare sites of presentation. One patient developed cerebral PTLD, two patients were diagnosed with SMT, located at the stomal orifice and in cervicothoracic paravertebral area, respectively, and the last patient developed a retroperitoneal angiosarcoma. Unfortunately, the overall patient outcome was poor in all but one child with SMT, who currently survives with cytotoxic T-cell therapy.

CONCLUSION

Unusual malignancies can occur in approximately 5% of children following ITx. A high index of suspicion is required for a timely diagnosis and adequate treatment.

Children with heart transplants: Lessons learned from 774 visits at a primary community clinic

Aims Unexpected decompensation of PHTRs may surprise, when the patient is at home. If the PHTR lives a distance from transplant center, the task of identifying risk factors of allograft rejection/dysfunction falls primarily on the PCP in the PCC, whether or not they are knowledgeable toward pediatric heart-transplantation. Methods We reviewed the medical reports of three heart-transplanted children in our periphery clinic between the years 2005 and 2019. Results The unexpected death of one patient, hours after he left our health facility, was the impetus for writing this article. Another heart transplant child attended our periphery clinic for 774 visits. Majority of visits were casual, others were scheduled, and the rest were for administrative affairs. We referred the PHTR to the transplantation center in 9% of all visits. In remaining 91% visits, we handled problems locally. Conclusions One of the important lessons we have learned through handling the PHTR at the PCC is that, during daily workflows and dealing with the occasional visits of a heart transplant child, related critical clinical information to allograft rejection or its dysfunction can easily evade from awareness of the attending physician. Through this study, we demonstrated that a program of summoning the PHTR to "initiated monthly visits" at the PCC enables the PCP to be maximally aware of critical clinical information, in addition to limiting futile referrals of 91% of the visits to specialized centers, without adversely affecting the prognosis.

Efficacy and safety of tacrolimus in de novo pediatric transplant recipients randomized to receive immediate- or prolonged-release tacrolimus

BACKGROUND AND AIMS

This multicenter trial compared immediate-release tacrolimus (IR-T) vs prolonged-release tacrolimus (PR-T) in de novo kidney, liver, and heart transplant recipients aged <16 years. Each formulation had similar pharmacokinetic (PK) profiles. Follow-up efficacy and safety results are reported herein.

MATERIALS AND METHODS

Patients, randomized 1:1, received once-daily, PR-T or twice-daily, IR-T within 4 days of surgery. After a 4-week PK assessment, patients continued randomized treatment for 48 additional weeks. At Year 1, efficacy assessments included the number of clinical acute rejections, biopsy-confirmed acute rejection (BCAR) episodes (including severity), patient and graft survival, and efficacy failure (composite of death, graft loss, BCAR, or unknown outcome). Adverse events were assessed throughout.

RESULTS

The study included 44 children. At Year 1, mean ± standard deviation tacrolimus trough levels were 6.6 ± 2.2 and 5.4 ± 1.6 ng/mL, and there were 2 and 7 acute rejection episodes in the PR-T and IR-T groups, respectively. No cases of graft loss or death were reported during the study. The overall efficacy failure rate was 18.2% (PR-T n = 1; IR-T n = 7).

CONCLUSIONS

In pediatric de novo solid organ recipients, the low incidence of BCAR and low efficacy failure rate suggest that PR-T-based immunosuppression is effective and well tolerated to 1-year post-transplantation.

Patient-reported outcome measures within pediatric solid organ transplantation: A systematic review

Subjective evaluation of medical care and disease outcomes from patients' perspectives has become increasingly important. Patient-reported outcome measures (PROMs) play a prominent role in engaging patients, capturing their experiences and improving patient care. This systematic review sought to identify PROMs that are used in the field of pediatric solid organ transplantation, with the aim to inform the implementation of PROMs into clinical practice for this population. A systematic review of English language, peer-reviewed articles was performed on key health science databases to identify publications using PROMs in pediatric solid organ transplantation. The search yielded 3670 articles, with a final data set of 62 articles that included 47 different PROMs. The three most frequently used PROMs included the following: (a) PedsQL™ Generic Core Scales (n = 25); (b) Children's Depression Inventory (n = 6); and (c) Child Health Questionnaire (n = 6). Of the 47 PROMs, 42 were generic and five were disease-specific; only six PROMS had a documented psychometric evaluation within a pediatric solid organ transplant population. This review outlines the attributes of the instruments (eg, domains captured), as well as the psychometric properties of those evaluated. PROMs are increasingly used in the field of pediatric transplantation; however, there are limited details in the current literature about their conceptual underpinnings and psychometric properties. This review highlights the need for additional psychometric evaluation of identified measures to establish the necessary foundation to inform the implementation of PROMs into clinical care for pediatric solid organ transplant patients.

Solid organ transplantation after hematopoietic stem cell transplantation in childhood: A multicentric retrospective survey

We report data obtained from a retrospective multicenter pediatric survey on behalf of the European Society for Blood and Marrow Transplantation (EBMT). Information on solid organ transplantation (SOT) performed in pediatric recipients of either autologous or allogeneic hematopoietic stem cell transplantation (HSCT) between 1984 and 2016 was collected in 20 pediatric EBMT Centers (25.6%). Overall, we evaluated data on 44 SOTs following HSCT including 20 liver (LTx), 12 lung (LuTx), 6 heart (HTx), and 6 kidney (KTx) transplantations. The indication for SOT was organ failure related to intractable graft-vs-host disease in 16 children (36.3%), acute or chronic HSCT-related toxicity in 18 (40.9%), and organ dysfunction related to the underlying disease in 10 (22.8%). The median follow-up was 10.9 years (95% confidence interval: 1.7-29.5). The overall survival rate at 1 and 5 years after SOT was 85.7% and 80.4%, respectively: it was 74% and 63.2% after LTx, 83.2% after HTx, and 100% equally after LuTx and KTx. This multicenter survey confirms that SOT represents a promising option in children with severe organ failure occurring after HSCT. Additional studies are needed to further establish the effectiveness of SOT after HSCT and to better understand the mechanism underlying this encouraging success.

Effects of the strict control of blood pressure in pediatric renal transplant recipients-ESCORT trial

OBJECTIVES

Strict BP control can retard progression of CKD in children. This prospective 3-year randomized controlled trial is aimed to investigate whether strict BP control can retard progression of chronic allograft dysfunction.

METHODS

Twenty-three pediatric patients were randomly selected to the standard BP group (STAND, target 24-hour MAP 50-95th percentile, n = 11) or the intensified BP group (INTENS, target 24-hour MAP <50th percentile, n = 12). The primary endpoint was an annual reduction in eGFR (Schwartz formula, mL/min/1.73 m² /y), secondary graft survival, BP, proteinuria, and safety.

RESULTS

A total of 21 children (age at entry 11.2 (range 6.2-16.8) years) completed the study, with 73% of children in INTENS and 70% of children in STAND group reached their goal BP. Ambulatory indexed 24-hour MAP decreased significantly in INTENS group (from 0.94 (range 0.86-1.17) to 0.85 (range 0.79-1.01, P < 0.01)) but not in STAND group (from 0.93 (range 0.85-1.07) to 0.90 (range 0.84-1.01)). Proteinuria did not change significantly in either group (22.1 mg/mmol creatinine to 15.3 in STAND group vs 25.7 to 11.8 in INTENS group). The annual reduction in eGFR did not differ between the INTENS and STAND groups (-1.9 mL/min/1.73 m² /y (range +6.4 to -14.3) vs -0.9 (range +4.0 to -8.5)).

CONCLUSION

This first randomized controlled trial on strict BP control has demonstrated that strict BP control is feasible in 73% of children but the strict BP control does not lead to retardation of graft function decline in comparison with standard BP control. However, the results need to be interpreted with caution keeping the major limitation of the study, that is, small sample size in mind.

Parents' experiences of donation to their child before kidney transplantation: A qualitative study

AIM AND OBJECTIVES

To explore parents' experiences of donation to their child before kidney transplantation.

BACKGROUND

Transplantation is the treatment of choice for paediatric patients with end-stage renal disease. Living donor kidney transplantation has shown a higher long-term transplant survival compared to deceased donor transplantation and entails a more controllable process, with shorter waiting time. Besides complex care and treatment of their child, parents must reflect on the prospects of being a donor for their child. However, little is known about the parent donor and parent caregiver perspective.

DESIGN

A qualitative exploratory study taking a phenomenological-hermeneutic approach.

METHOD

The study was conducted in a Danish university hospital. Interviews were conducted with the parents of seven children, aged between 5-15 years, with end-stage renal disease in the period before kidney transplantation. Data were analysed with inspiration from Ricoeur's theory of interpretation on three levels: naïve reading, structural analysis and critical interpretation and discussion.

RESULTS

The decision about donation was experienced as a matter of course and commitment. There were preferences for a kidney from a living donor, including the hope of being accepted as a donor. Being refused as a donor revealed feelings of powerlessness. However, transformation was performed into having a new role providing care and comfort to the child during the transplant process. Asking family and friends about donation could feel like crossing a line.

CONCLUSION

The prospect of donating to one's child had an impact on the well-being of the entire family. Parents were in a vulnerable situation and in need of support, regarding both living and deceased donation. Waiting time included hopeful thoughts and reflections on a new caregiver role for the child during transplantation.

RELEVANCE TO CLINICAL PRACTICE

Health professionals' attention, engagement and dialogue are essential in order to gain extensive and varied knowledge about the individual parent's experiences and the well-being of the entire family to provide care and support before, during and after the donation and transplantation process.

[Extracorporeal life support and heart-lung transplant in children]

Extracorporeal life support and heart and/or lung transplant are the last resort in children with end-stage cardiac and/or pulmonary failure and short-term life threaten. Currently, circulatory support is used as a bridge to recovery or as a bridge to transplant but not as a destination therapy. The Excor Berlin Heart is the long-lasting external pneumatic ventricular assist system that is currently available from infancy to adulthood. Long-term prognosis after pediatric cardiac and/or pulmonary transplant is conditioned by the occurrence of graft failure, coronary disease of the cardiac graft, viral infections and bronchiolitis obliterans of the pulmonary graft, the incidence of which increase with time. The scarcity of grafts and the risk of acute rejection due to lack of compliance with immunosuppressive treatment require the transplant specialized teams to choose the best candidates according to psychosocial and biological criteria. The next expected developments concern mainly long-term ventricular assistance with systems that allow for greater autonomy and a return to the child's home.

Matching donor and recipient based on predicted indirectly recognizable human leucocyte antigen epitopes

The predicted indirectly recognizable human leucocyte antigen (HLA) epitopes (PIRCHE) algorithm is a novel in silico algorithm to determine donor-recipient compatibility. The PIRCHE algorithm determines donor-recipient compatibility by counting the number of mismatched HLA-derived epitopes that are involved in indirect T-cell alloimmune responses; these epitopes are designated as PIRCHE. Over the last few years, the PIRCHE algorithm has been investigated in both hematopoietic stem cell transplantation and solid organ transplantation. This review describes the theory of the algorithm, its application in transplantation, and highlights the future perspectives on the clinical application of the PIRCHE algorithm.

Clinical risk stratification of paediatric renal transplant recipients using C1q and C3d fixing of de novo donor-specific antibodies

INTRODUCTION

We have previously shown that children who developed de novo donor-specific human leukocyte antigen (HLA) antibodies (DSA) had greater decline in allograft function. We hypothesised that patients with complement-activating DSA would have poorer renal allograft outcomes.

METHODS

A total of 75 children developed DSA in the original study. The first positive DSA sample was subsequently tested for C1q and C3d fixing. The primary event was defined as 50% reduction from baseline estimated glomerular filtration rate and was analysed using the Kaplan-Meier estimator.

RESULTS

Of 65 patients tested, 32 (49%) and 23 (35%) tested positive for C1q and C3d fixing, respectively. Of the 32 C1q-positive (c1q+) patients, 13 (41%) did not show concomitant C3d fixing. The mean fluorescence intensity values of the original immunoglobulin G DSA correlated poorly with complement-fixing positivity (C1q: adjusted R ² 0.072; C3d: adjusted R ² 0.11; p < 0.05). C1q+ antibodies were associated with acute tubulitis [0.75 ± 0.18 (C1q+) vs. 0.25 ± 0.08 (C1q-) episodes per patient (mean ± standard error of the mean; p < 0.05] but not with worse long-term renal allograft dysfunction (median time to primary event 5.9 (C1q+) vs. 6.4 (C1q-) years; hazard ratio (HR) 0.74; 95% confidence ratio (CI) 0.30-1.81; p = 0.58]. C3d-positive (C3d+) antibodies were associated with positive C4d histological staining [47% (C3d+) vs. 20% (C3d-); p = 0.04] and with significantly worse long-term allograft dysfunction [median time to primary event: 5.6 (C3d+) vs. 6.5 (C3d-) years; HR 0.38; 95% CI 0.15-0.97; p = 0.04].

CONCLUSION

Assessment of C3d fixing as part of prospective HLA monitoring can potentially aid stratification of patients at the highest risk of long-term renal allograft dysfunction.

Quality of life outcomes following pediatric lung transplantation

PURPOSE

Compared to other solid organs, survival after lung transplantation (LTx) is still poor. Discussions on survival benefits following LTx in children, however, have largely concentrated on medical outcome data. Little research describes quality of life (QoL) of pediatric LTx recipients, which is partly due to the small number of pediatric LTxs performed. Only two centers worldwide performed >10 pediatric LTxs in 2013, making data on QoL in this population difficult to obtain. The primary objective was to examine the impact of LTx on QoL of pediatric recipients.

METHODS

LTx recipients aged 8-17 years and their parents were recruited from a Canadian pediatric transplant centre. Participants completed the PedsQL 4.0 Generic Core Scales, a validated health-related QoL patient-reported outcome measure for children and adolescents, pre-transplant and two times post-transplant. Pre-LTx QoL scores were compared with initial assessment scores post-LTx and changes in QoL over time were described. Correlations between self- and proxy-reports were also discussed.

RESULTS

Ten pediatric LTx recipients (six male, mean age = 13.3 years) and their parents were enrolled. Assessments were completed pre-LTx (mean months = 4.8) and two times post-LTx (mean months 8.7 and 24.6, respectively). Pre- and post-transplant total scores differed significantly for both self- and proxy-report, which remained consistent at a second assessment post-transplant (P = 0.018 and 0.028, respectively).

CONCLUSIONS

Findings highlight the importance of QoL outcomes when exploring LTx as a treatment option. Future research should explore long-term QoL outcomes post-LTx and examine standardized integration of patient-reported outcomes into clinical practice.

Epidemiology, management and outcome of ultrashort bowel syndrome in infancy

Ultrashort bowel syndrome (USBS) is a group of heterogeneous disorders where the length of small bowel is less than 10 cm or 10% of expected for the age. It is caused by massive loss of the gut which in the neonatal period can be a result of vanishing gastroschisis or surgical resection following mid-gut volvulus, jejunoileal atresia and/or extensive necrotising enterocolitis. The exact prevalence of USBS is not known although there is a clear trend towards increasing numbers because of increased incidence and improved survival. Long-term parenteral nutrition (PN) is the mainstay of treatment and is best delivered by a multidisciplinary intestinal rehabilitation team. Promoting adaptation is vital to improving long-term survival and can be achieved by optimising feeds, reducing intestinal failure liver disease and catheter-related bloodstream infections. Surgical techniques that can promote enteral tolerance and hence improve outcome include establishing intestinal continuity and bowel lengthening procedures. The outcome for USBS is similar to patients with intestinal failure due to other causes and only a small proportion of children who develop irreversible complications of PN and will need intestinal transplantation. In this review, we will summarise the available evidence focusing particularly on the epidemiology, management strategies and outcome.

Post-transplant lymphoproliferative disorder after solid-organ transplant in children

The post-transplant lymphoproliferative disorders (PTLD) are a diverse group of potentially life-threatening conditions affecting organ transplant recipients. PTLD arises in the setting of an attenuated host immunologic system that is manipulated to allow a foreign graft but then fails to provide adequate immune surveillance of transformed malignant or premalignant lymphocytes. The diversity of biological behavior and clinical presentation makes for a challenging clinical situation for those involved in the care of children with PTLD occurring after solid-organ transplantation. This review details a large transplant center's multidisciplinary approach to monitoring for PTLD and systematic approach to intervention, which has been essential for early recognition and successful treatment.

Outcomes of Lung Transplantation for Infants and Children with Genetic Disorders of Surfactant Metabolism

OBJECTIVE

To compare outcomes of infants and children who underwent lung transplantation for genetic disorders of surfactant metabolism (SFTPB, SFTPC, ABCA3, and NKX2-1) over 2 epochs (1993-2003 and 2004-2015) at St Louis Children's Hospital.

STUDY DESIGN

We retrospectively reviewed clinical characteristics, mortality, and short- and long-term morbidities of infants (transplanted at <1 year; n = 28) and children (transplanted >1 year; n = 16) and compared outcomes by age at transplantation (infants vs children) and by epoch of transplantation.

RESULTS

Infants underwent transplantation more frequently for surfactant protein-B deficiency, whereas children underwent transplantation more frequently for SFTPC mutations. Both infants and children underwent transplantation for ABCA3 deficiency. Compared with children, infants experienced shorter times from listing to transplantation (P = .014), were more likely to be mechanically ventilated at the time of transplantation (P < .0001), were less likely to develop bronchiolitis obliterans post-transplantation (P = .021), and were more likely to have speech and motor delays (P ≤ .0001). Despite advances in genetic diagnosis, immunosuppressive therapies, and supportive respiratory and nutritional therapies, mortality did not differ between infants and children (P = .076) or between epochs. Kaplan-Meier analyses demonstrated that children transplanted in epoch 1 (1993-2003) were more likely to develop systemic hypertension (P = .049) and less likely to develop post-transplantation lymphoproliferative disorder compared with children transplanted in epoch 2 (2004-2015) (P = .051).

CONCLUSION

Post-lung transplantation morbidities and mortality remain substantial for infants and children with genetic disorders of surfactant metabolism.