Evaluation of body growth in prepubertal Japanese children with obstructive sleep apnea after adenotonsillectomy over a long postoperative period

Changes during medical treatments before adenotonsillectomy in children with obstructive sleep apnea

OBJECTIVES

The severity of pediatric obstructive sleep apnea (OSA) can vary from mild to very severe (AHI ≥ 30 events/h) with the seasons. The efficacy of medical treatment has been investigated in cases of mild and moderate pediatric OSA, but not in severe cases thoroughly.

METHODS

Our prospective cohort study involved 205 children who visited our outpatient clinic between December 2014 and May 2020. We performed home sleep tests after the initial visit, and then polysomnography after optimizing the control of rhinitis, sinusitis, adenoid hypertrophy, and tonsillitis by using medical treatments.

RESULTS

The respective proportions of patients who improved to obstructive AHI (O-AHI) < 1/h or who proceeded to surgery were 43.4% and 62.3% in mild cases; 43.3% and 52.2% in moderate cases; 30.2% and 68.4% in severe cases; and 0.0% and 100% in very severe cases. Additionally, nadir SaO₂ improved significantly between before and after medical treatment in both O-AHI < 1/h and O-AHI ≥ 1/h patients (respectively p < 0.0001, p = 0.0009). The lowest nadir SaO₂ before medical treatment was 74% in patients in whom O-AHI was normalized after medical treatments.

CONCLUSION

Medical treatment instituted before a surgical decision is made can provide substantial benefits and avoid unnecessary surgery if there is time for such treatments. In contrast, it may be difficult to normalize the O-AHI in pediatric patients with very severe OSA or a nadir SaO₂ of less than 74% by medical treatment.

Improvement in BMI z-score following adenotonsillectomy in adolescents aged 12-18 years: a retrospective cohort study

BACKGROUND

Characteristics of obstructive sleep apnea (OSA) changes with age. Infants, toddlers and prepubertal children with OSA are usually underweight and may suffer from failure to thrive (FTT). Adenotonsillectomy (T&A) is the first line of treatment for OSA in childhood. In adults OSA is commonly associated with obesity and the metabolic syndrome. The change in body mass index (BMI) in adolescents with OSA following T&A was only sporadically studied. Thus, we peruse to examine the BMI z-score change following T&A in adolescents.

METHODS

Clalit Health Services is the largest health care organization in Israel with the largest patient registry (more than 50% of the population). Two hundred and forty two adolescents aged 12-18 who underwent T&A between 2006 and 2015 were identified in the Clalit registry and their characteristics including height and weight were retrieved. The BMI z-score of these adolescents at baseline (up to 3 months prior to T&A) and during the consecutive 3 years after T&A were analyzed and compared.

RESULTS

Changes in BMI Z-score were observed to all directions following T&A with overall small increase, not statistically significant (P = 0.26) from a median of 0.79 prior to T&A to a median of 0.835 after it. There was a minimal trend toward BMI z-score reduction in overweight children (n = 74) from 1.508 to 1.48 following T&A (p = NS), and in obese children (n = 33) from 2.288 to 2.000 (P = 0.06, 2 tailed). Interestingly thin individuals (n = 6) increased their BMI z-score following T&A from - 2.4 to - 0.59 (p = 0.046).

CONCLUSIONS

Adolescents show variable changes in their BMI z-score following T&A. In this aspect their BMI z-score change is closer to the change seen in adults treated for OSA and not that of young children. The changes observed show a trend toward normalization of the BMI z-score such that overweight children tend to decrease their BMI z-score while thin individuals tend to increase it.

Crescimento pôndero-estatural de crianças e adolescentes submetidos à adenoamigdalectomia

Objetivo: documentar de forma sistemática o padrão de desenvolvimento pôndero-estatural de pacientes submetidos à adenoamigdalectomia.Métodos: coleta de dados secundários dos prontuários de pacientes atendidos no ambulatório de Otorrinolaringologia Pediátrica, antes e depois da cirurgia de adenoamigdalectomia.Resultados: de forma individual, os pacientes apresentaram elevação no escore Z e percentis das variáveis ao peso e a altura no período entre as análises. Especificamente em relação ao peso, a média antes do procedimento e quatro meses depois do procedimento foi, respectivamente, de 29,1 kg e 32,8 kg; no que diz respeito à altura, a média foi de 1,22 m e 1,25 m, respectivamente. Ao aplicar oTeste T de Student foi possível notar significância estatística para ambas asvariáveis em estudo. Aspecto não percebido ao avaliar os indivíduos reunidos em grupos etários (pré-escolares, escolares e adolescentes).Conclusões: as crianças submetidas à adenoamigdalectomia apresentaram ganho pôndero-estaturalapós a cirurgia. A atuação cirúrgica diante do diagnóstico da hipertrofia e da hiperplasia das amígdalas e tonsila faríngea deve ser precoce, desde que haja indicação formal, a fim de evitar a manutenção do atraso no crescimento nesses pacientes.

Beyond the growth delay in children with sleep-related breathing disorders: a systematic review

INTRODUCTION

The availability of high-quality studies on the association between sleep-disordered breathing in children and delayed growth associated with the hormonal profile recorded before surgery and at follow-up is limited.

EVIDENCE ACQUISITION

Medline PubMed, Scopus and WebOfScience databases were searched for relevant publications published between January 2008 to January 2020 and a total of 261 potentially eligible studies were identified.

EVIDENCE SYNTHESIS

Following review 19 papers were eligible for inclusion: seven reported a significant postsurgical increase in growth regardless of initial weight status, type of surgery, type of study design, and length of follow-up period. The only high-quality study was a randomized controlled trial that found an increased risk of obstructive sleep apnea syndrome relapse in overweight children. Twelve studies reported the significant increase in growth parameters showing that IGF-1, IGFBP-3, and ghrelin may boost growth after surgery.

CONCLUSIONS

The current systematic review demonstrates a scarcity of high-quality studies on growth delay in children with sleep-disordered breathing. Significant catch-up growth after surgery in the short term and changes in IGF-1, IGFBP-3, ghrelin, and leptin levels has been reported in most published studies.

Time-Course Evaluation of Body Mass Index in Japanese Children With Obstructive Sleep Apnea Syndrome After Adenotonsillectomy: A Three-Years Follow-Up Study

Delayed physical growth is a common complication of pediatric obstructive sleep apnea syndrome (OSAS). Adenotonsillectomy (AT) is the first-line treatment for pediatric OSAS. Only a few studies have performed time-course BMI evaluation in pediatric OSAS patients post-operatively. Thus, we aimed to evaluate the time-course changes in pediatric OSAS patients after AT. Thirty-three children with OSAS who underwent AT were included and divided into two groups on the basis of their BMI z-scores (delayed physical growth group, n = 15; non-delayed physical growth group, n = 18). Clinical records of height and weight were collected before AT and at 6, 12, 24, and 36 months after AT. Changes in the mean BMI z-scores of the two groups were assessed up to 36 months. The mean BMI z-score was significantly increased in the delayed physical growth group at 6 months after AT. In contrast, the increase in mean BMI z-score was not observed in the non-delayed physical growth group. Growth improvement was noted in pediatric OSAS patients with delayed physical growth after AT. Our results suggest that AT is a promising therapy for improving the physical growth of pediatric OSAS patients with such problems.

Effects of adenotonsillectomy on the growth of children with obstructive sleep apnoea-hypopnea syndrome (OSAHS): protocol for a systematic review

INTRODUCTION

Obstructive sleep apnoea-hypopnea syndrome (OSAHS) is characterised by recurring episodes of complete or partial upper airway collapse during sleep. Persistent OSAHS is associated with long-term consequences, such as growth failure, cardiovascular and neurocognitive problems in children. Different from the aetiology of OSAHS in adults, the most common cause of paediatric OSAHS is adenotonsillar hypertrophy. Adenotonsillectomy (AT) has been recommended as the first-line treatment of paediatric OSAHS. Several studies have suggested that retarded growth caused by OSAHS can improve after AT during the prepubertal period. This review will systematically search and summarise the available evidence on the effects of AT on children's growth.

METHODS AND ANALYSIS

We will conduct electronic searches in MEDLINE (via PubMed), Embase, Google Scholar and the Cochrane Central Register of Controlled Trials for randomised controlled trials (RCTs) or cohort studies that included a control group. Additional records will be searched by checking the references included in the selected studies and relevant reviews. At least two authors will undertake selection of studies and data extraction independently and in duplicate. The Cochrane Risk of Bias tool and Risk Of Bias In Non-randomised Studies-of Interventions will be used to assess the risk of bias of RCT and cohort studies, respectively. A random-effects model will be used for meta-analyses. Data synthesis and other analyses will be carried out using the RevMan V.5.3 software. The Grades of Recommendation, Assessment, Development and Evaluation will be used to assess the quality of the supporting evidence behind each main comparison.

ETHICS AND DISSEMINATION

There is no ethical issue in this systematic review given that we will only include published studies. The results will be disseminated via peer-reviewed publications and social networks.

PROSPERO REGISTRATION NUMBER

CRD42019125882.

Obstructive sleep apnea syndrome and growth failure

Obstructive sleep apnea syndrome is a common problem among children and is recognized as a cause of significant medical morbidity. Since the 1980s, it has been suggested that obstructive sleep apnea syndrome is a risk factor for growth failure in children. In many cases, it has been shown that growth failure is reversible once the obstructive sleep apnea syndrome is resolved. The objectives of this study were to analyze and compare growth failure prevalence in a Mediterranean population of children with obstructive sleep apnea syndrome and healthy children matched in age and sex, and to assess the effectiveness of tonsillectomy and adenoidectomy in resolving growth retardation. We compared 172 children with obstructive sleep apnea syndrome (apnea-hypopnea index ≥ 3) who had undergone tonsillectomy and adenoidectomy with 172 healthy controls in terms of key anthropometric parameters. Most of the criteria used for growth failure were higher to a statistically significant degree in the study group vs the control group: height-for-age ≤ 3rd percentile (7.56% vs 2.91%; p = 0.044), weight-for-age ≤ 5th percentile (9.30% vs 2.33%; p = 0.005), weight-for-age ≤ 3rd percentile (8.14% vs 2.33%; p = 0.013) and height and/or weight for-age ≤ 5th percentile (13.95% vs 5.81%; p = 0.009). The height-for-age ≤ 5th percentile was almost at the limit of statistical significance (8.72% for the study group vs 4.65% for the control group; p = 0.097). At one-year post-surgery follow-up, 10 of 15 children with height-for-age ≤ 5th percentile had achieved catch-up growth (66.6%), and 14 of 24 children with height- and/or weight-for-age ≤ 5th percentile had normalized growth (58.33%). For children with failure to thrive or who have growth failure, physicians should consider the possibility of obstructive sleep apnea. A significant number of children with obstructive sleep apnea concurrent with growth failure could benefit from tonsillectomy and adenoidectomy to recover and normalize their growth rate.