The Accuracy of an Ambulatory Level III Sleep Study Compared to a Level I Sleep Study for the Diagnosis of Sleep-Disordered Breathing in Children With Neuromuscular Disease

Comparing home polysomnography with transcutaneous CO2 monitoring to laboratory polysomnography in children with neuromuscular disorders

STUDY OBJECTIVES

Clinical utility of home polysomnography in children with neuromuscular disorders is limited by lack of evidence that sleep-disordered breathing can be reliably identified and inability to diagnose hypoventilation because carbon dioxide is not measured.

METHODS

This study aimed to determine the feasibility, accuracy, and parent satisfaction for home polysomnography performed with a type 2 portable monitoring device and a transcutaneous CO2 monitor. Results of laboratory and home polysomnography were compared with Mann-Whitney U tests and random intercept regression models.

RESULTS

Nineteen paired polysomnograms were performed for participants with various neuromuscular disorders at a median age of 9 years. Feasibility, defined as adequate data recorded from the portable monitoring device and transcutaneous CO2 monitor, was 68%. Adequate transcutaneous CO2 data were recorded in 89% of home studies. Significant differences were higher total sleep time, less awake time, and less N1 sleep during home polysomnography. Home polysomnography had a sensitivity of 50% for diagnosis of hypoventilation and 78% for obstructive sleep apnea. Home polysomnography underestimated severity of obstructive sleep apnea in 3 cases. Parent satisfaction for home polysomnography was high.

CONCLUSIONS

This is the first study to measure transcutaneous CO2 during type 2 home polysomnography in children with neuromuscular disorders. Results suggest better sleep quality at home during testing. Current sensitivity of home polysomnography for the diagnosis of sleep-disordered breathing is too low for clinical use; however, the feasibility of transcutaneous CO2 measurement in the home and high satisfaction justify further research to improve accuracy of home polysomnography in this population.

CITATION

Withers A, Pettigrew G, Filmer K, Lam J, Downs J, Wilson A. Comparing home polysomnography with transcutaneous CO2 monitoring to laboratory polysomnography in children with neuromuscular disorders. J Clin Sleep Med. 2025;21(4):639-648.

Diagnostic accuracy of portable sleep monitors in pediatric sleep apnea: A systematic review

In recent years, a plethora of new type III and IV portable sleep monitors (PSM) have been developed, although evidence regarding their diagnostic accuracy for use in children remains heterogeneous. This study systematically reviews the literature addressing the diagnostic accuracies of type III and IV PSM for pediatric sleep apnea. Publications indexed in Medline, Embase, or Web of Science were reviewed using the PRISMA framework. Of 1054 studies, 62 fulfilled the inclusion criteria. Of the studies evaluating oximetry-based type IV PSM, one (6.25 %) demonstrated a balanced set of high (≥80 %) sensitivities and specificities for the diagnosis of any pediatric sleep apnea, while five studies (27.8 %) showed similar accuracies for moderate-to-severe sleep apnea. For non-oximetry-based type IV PSM, two studies (40 %) reported a balanced set of high diagnostic accuracies for moderate-to-severe sleep apnea. Type III PSM repeatedly demonstrated higher diagnostic accuracies, with six studies (66.7 %) reporting a balanced set of high diagnostic accuracies for moderate-to-severe sleep apnea. This review highlights the potential of type III PSM to detect moderate-to-severe pediatric sleep apnea, although current evidence is limited to support the stand-alone use of type IV PSM for the diagnosis of sleep apnea in most children.

Effects of traditional Chinese exercise on sleep quality: A systematic review and meta-analysis of randomized controlled trials

BACKGROUND

The efficacy of traditional Chinese exercise (TCE)-based interventions in the improvement of sleep quality is controversial. In this systematic review, we aimed to summarize randomized controlled trials (RCTs) that outline the effects of TCE on sleep quality.

METHODS

Five databases (Web of Science, Embase, PubMed, Medline, and China National Knowledge Infrastructure) were searched for literature published before July 2022. RCTs examining TCE interventions were included. The treatment effects were estimated using a random-effect meta-analysis model with mean differences (MDs). There were 2 outcome scales for sleep quality; however, because they were extremely contrastive to be analyzed by standard MD, the scales were analyzed separately to ensure the accuracy of the results. This review was registered in the International Prospective Register of Systematic Reviews (identifier CRD42023421314).

RESULTS

Twenty studies were included for analysis at last. The outcome was calculated using the Verran and Snyder-Halpern Sleep Scale (MD: 344.17, 95% confidence interval: 316.95 to 371.39, P < .00001) and Pittsburgh Sleep Quality Index to measure sleep quality (MD: -2.24, 95% confidence interval: -3.05 to -1.43, P < .00001), both showed improvement effect. In subgroup analysis, for patients with fibromyalgia, normal older adults, and non-Hodgkin lymphoma, chronic fatigue syndrome-like illness, knee osteoarthritis, nasopharyngeal carcinoma, pausimenia, insomnia, TCE could improve sleep quality. However, there was no significant improvement in stroke patients, breast cancer patients, normal college students, and episodic migraine patients. Tai Chi had greater effects in improving sleep quality than Qigong. In addition, the participants practice site, duration, and age did not influence the effects of TCE.

CONCLUSION

TCE can improve sleep quality in specific populations in specific populations clinical applications. Tai chi should be considered first to improve sleep quality. However, further extensive trials and rigorous study designs should be conducted to strengthen the findings of this study. In addition, considering the large heterogeneity, the findings of our study should be interpreted cautiously.

Respiratory Insufficiency in Neuromuscular Disease (RIND): A Delphi Study to Establish Consensus Criteria to Define and Diagnose Hypoventilation in Pediatric Neuromuscular Disease

Chronic respiratory failure is a common endpoint in the loss of respiratory muscle function in patients with progressive neuromuscular disease (NMD). Identifying the onset of hypoventilation is critical to allow for the timely introduction of ventilator support and effectively manage respiratory failure [1-3]. While there are accepted criteria governing the diagnosis of hypoventilation during polysomnography (PSG) [4], there is concern that criteria are insufficient for identifying hypoventilation in the earlier stages of respiratory insufficiency related to NMD. The purpose of this project was to identify more sensitive criteria for identifying hypoventilation.

METHODS

Fifteen pediatric pulmonologists with broad experience in managing patients with NMD, 10 of whom were board certified in and practice sleep medicine, were assembled and performed a review of the pertinent literature and a two-round Delphi process with 6 domains (Table 1).

RESULTS

Within the 6 domains there were three pertinent items per domain (Table 2). There was clear agreement on findings on history (morning headaches) and pulmonary function testing (FVC < 50% or awake TcCO2 > 45 mmHg) indicating a high concern for nocturnal hypoventilation. There was close agreement on the definitions for nocturnal hypercapnia and hypoxemia. PSG criteria were identified that indicate a patient is likely in the transitional phase from adequate ventilation to hypoventilation.

DISCUSSION

We identified a set of clinical criteria that may allow for more sensitive diagnosis of hypoventilation in NMD and earlier initiation of non-invasive ventilation leading to a reduction in the respiratory morbidity in progressive NMD. These criteria need to be further and more broadly validated prospectively to confirm their utility.

Ambulatory transcutaneous carbon dioxide monitoring for children with neuromuscular disease

OBJECTIVE

Early screening and diagnosis of nocturnal hypoventilation can slow progression to diurnal hypercapnia and mortality in children with neuromuscular disease (NMD). However, gold standard, laboratory-based polysomnography (PSG) testing is a limited resource. Therefore, we evaluated the diagnostic accuracy of ambulatory transcutaneous carbon dioxide (tcCO₂) monitoring used in the home compared to PSG in children with NMD.

METHODS

Prospective, cross-sectional study in children 0-18 years old with a confirmed diagnosis of NMD and a clinically indicated need for PSG. Ambulatory tcCO₂ was assessed by a respiratory therapist in participant's homes. Demographics, and PSG (including tcCO₂).

RESULTS

We enrolled 39 children with NMD; 3 had unusable ambulatory tcCO₂ data because of failure of drift correction on the machine (n = 2) or an air bubble (n = 1). The remaining 36 patients aged 11 months to 16 years (median (IQR) 12.5 years (6.0-15.8)) had ambulatory tcCO₂ and outpatient level 1 PSG data. Ambulatory tcCO₂ monitoring had a sensitivity of 20.0% (95% confidence interval [CI] 0.5-71.6%) and a specificity of 93.5% (95% CI 78.6-99.2%). Almost all children and/or parents (34/36, 94%) preferred ambulatory monitoring over in-hospital PSG.

CONCLUSIONS

Ambulatory transcutaneous carbon dioxide monitoring was not sufficiently accurate as a clinical tool for the diagnosis of nocturnal hypoventilation our cohort of children with neuromuscular disease despite being preferred over PSG by both children and parents.

Validation of home portable monitoring for the diagnosis of sleep-disordered breathing in adolescents and adults with neuromuscular disorders

STUDY OBJECTIVES

Sleep-disordered breathing (SDB) is common in patients with neuromuscular disorders (NMD), developing before chronic hypercapnia appears. Polysomnography (PSG) is the diagnostic gold standard but is often impractical and poorly accessible for individuals with NMD. We sought to determine the diagnostic accuracy, feasibility, and patient preference of home sleep apnea testing (HSAT) compared with PSG for the detection of SDB in NMD.

METHODS

Participants with NMD at risk for SDB aged ≥ 13 years underwent HSAT followed by overnight PSG with concomitant laboratory sleep apnea testing (same device as HSAT). Sensitivity and specificity were calculated for standard apnea-hypopnea index cutoffs for mild (≥ 5 events/h), moderate (≥ 15 events/h), and severe SDB (≥ 30 events/h) and for an oxygen desaturation index ≥ 5 events/h. Receiver operating characteristic curves were built. A questionnaire assessed patient preference.

RESULTS

Of 38 participants, 73% had moderate to severe SDB and 79% had technically acceptable HSAT. For an apnea-hypopnea index ≥ 15 events/h, HSAT sensitivity and specificity were 50% and 88%, respectively. For an oxygen desaturation index ≥ 5 events/h, HSAT sensitivity and specificity were 95% and 78%, respectively. The area under the receiver operating characteristic curve for an apnea-hypopnea index ≥ 15 events/h was 0.88 (95% confidence interval, 0.69-1.00) for HSAT. The HSAT underestimated the apnea-hypopnea index from PSG (bias, -10.7 ± 15.9 events/h). HSAT was preferred to PSG by 61% of participants.

CONCLUSIONS

HSAT is feasible, preferred by patients, and reliable for detecting SDB in most patients, although it cannot definitively rule out SDB. Therefore, HSAT is a viable diagnostic approach for SDB in NMD when PSG is not feasible, recognizing that it does not accurately distinguish between upper-airway obstruction and hypoventilation. Additional work is needed to further optimize home sleep testing in NMD.

CITATION

Westenberg JN, Petrof BJ, Noel F, et al. Validation of home portable monitoring for the diagnosis of sleep-disordered breathing in adolescents and adults with neuromuscular disorders. J Clin Sleep Med. 2021;17(8):1579-1590.