Observational studyEuropean journal of pediatrics2024
Reliability and reference values for diaphragmatic excursion, thickness, and thickening fraction and quadriceps femoris muscle thickness in full-term newborns evaluated by ultrasound.
Observational study in European journal of pediatrics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Trial
- Serial Ultrasound Assessment of Diaphragmatic Function in Term Neonates During the First 48 Hours of Life.Diagnostics (Basel, Switzerland) · 2026Article
- Agreement of Diaphragmatic Excursion Between Anterior Subcostal and Posterior Subcostal Ultrasonography in Premature Neonates.Pediatric pulmonology · 2026Article
- Functional Assessment of the Neonatal Diaphragm Using Point-of-Care Ultrasound: A Review of Techniques, Clinical Applications, and Challenges.CHEST pulmonary · 2026Article
- Combined diaphragm and lung ultrasound profiling in healthy full-term neonates: a study of early postnatal function.European journal of pediatrics · 2026Observational
- Diaphragm Interventions in Acute Flaccid Myelitis: A Single-Center Retrospective Case Series of Diaphragm Pacing Systems and Phrenic Nerve Transfers.Pediatric neurology · 2026Article
- Diaphragmatic ultrasonography: reference values and reliability for thickness, thickening fraction, and excursion in neonates.European journal of pediatrics · 2025Article
- M-mode measurement of diaphragm excursion.European journal of pediatrics · 2025Article
Corrections and comments
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Authors and funding
9 authors.
Funding
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Abstract
To determine the diaphragm thickness, thickening fraction, and excursion and thickness of the quadriceps femoris muscle in full-term newborns and to evaluate the intra- and interrater reliability of these measurements. This was a prospective, observational clinical study including full-term newborns born within the first 48 h after birth. Serial measurements of the thickness, thickening fraction, and mobility of the diaphragm muscles and the thickness of the quadriceps muscle were obtained using ultrasound images. A total of 69 newborns with a mean gestational age of 39 weeks were included. The following measurements were obtained and are expressed as the mean (standard deviation): inspiratory diaphragm thickness, 0.19 cm (0.04); expiratory diaphragm thickness, 0.16 cm (0.04); diaphragm thickness fraction, 16.70 cm (10.27); diaphragmatic excursion, 0.68 cm (0.22); and quadriceps thickness, 0.99 cm (0.14). Intrarater reliability was assessed using intraclass correlation coefficients (ICCs). Excellent intrarater agreement was observed for the two groups of operators (ICC > 0.86, p < 0.001) for all measurements except for the diaphragm thickening fraction, which showed good agreement for both operator groups (ICC = 0.70, p < 0.001). Regarding interrater reliability, moderate agreement between the raters was observed in the means of all measures (ICC > 0.49, p < 0.001), except for the diaphragm thickening fraction, which showed poor agreement. Conclusion: Good intrarater and moderate interrater reliability were achieved in ultrasound evaluations of the thickness and mobility of the diaphragm and quadriceps femoris muscles in full-term newborns, demonstrating the feasibility of this technique for clinical use. This pioneering study offers reference values for these muscles in a single study, allowing comparisons between different clinical conditions. What is Known: • Ultrasound is a highly reliable tool for muscle assessment that can be used to assess muscular atrophy in critically ill patients. • Muscle atrophy worsens the patient's condition and has been associated with worse outcomes. What is New: • To our knowledge, this is the first study to jointly evaluate the diaphragm and quadriceps muscle thickness and evaluate the reliability of all measurements. • Our study presents reference values for both muscles, enabling comparisons between different clinical conditions.
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