Comparison of Diaphragm Thickness Measurements Among Postures Via Ultrasound Imaging

Hellyer, Nathan J.; Andreas, Nicholas M.; Bernstetter, Andrew S.; Cieslak, Kathryn R.; Donahue, Gerad F.; Steiner, E.; Hollman, John H.; Boon, Andrea J.

doi:10.1016/j.pmrj.2016.06.001

Cited by 32 publications

(21 citation statements)

References 19 publications

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“…It is unclear whether a Tdi value below this threshold can be used to identify diaphragm dysfunction. Tdi does not seem to change with age [167] but can be influenced by posture [173], stature [171,174] and body composition [171,175]. In addition, in studies of patients with diaphragm weakness, a large proportion of subjects had Tdi values of 0.15 cm [176][177][178].…”

Section: Diaphragm Thicknessmentioning

confidence: 99%

ERS statement on respiratory muscle testing at rest and during exercise

et al. 2019

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Assessing respiratory mechanics and muscle function is critical for both clinical practice and research purposes. Several methodological developments over the past two decades have enhanced our understanding of respiratory muscle function and responses to interventions across the spectrum of health and disease. They are especially useful in diagnosing, phenotyping and assessing treatment efficacy in patients with respiratory symptoms and neuromuscular diseases. Considerable research has been undertaken over the past 17 years, since the publication of the previous American Thoracic Society (ATS)/European Respiratory Society (ERS) statement on respiratory muscle testing in 2002. Key advances have been made in the field of mechanics of breathing, respiratory muscle neurophysiology (electromyography, electroencephalography and transcranial magnetic stimulation) and on respiratory muscle imaging (ultrasound, optoelectronic plethysmography and structured light plethysmography). Accordingly, this ERS task force reviewed the field of respiratory muscle testing in health and disease, with particular reference to data obtained since the previous ATS/ERS statement. It summarises the most recent scientific and methodological developments regarding respiratory mechanics and respiratory muscle assessment by addressing the validity, precision, reproducibility, prognostic value and responsiveness to interventions of various methods. A particular emphasis is placed on assessment during exercise, which is a useful condition to stress the respiratory system.

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Section: Diaphragm Thicknessmentioning

confidence: 99%

ERS statement on respiratory muscle testing at rest and during exercise

et al. 2019

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“…The lower limit of normal for Tdi has been reported to be 0.15 cm in healthy subjects [120] and patients with COPD [122], but it is unclear whether a Tdi value below this threshold is representative of diaphragm dysfunction. Indeed, static diaphragm thickness can vary with posture [123] and stature [124], and in reports of patients with diaphragm paresis, the majority of the subjects had Tdi > 0.15 cm [125,126,127]. However, the temporal change in Tdi was correlated to the change in VC in patients with spontaneous recovery of diaphragm function [125].…”

Section: Clinical Presentation and Diagnosismentioning

confidence: 99%

Diaphragm Dysfunction: Diagnostic Approaches and Management Strategies

Dubé

Dres

2016

JCM

144

109

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The diaphragm is the main inspiratory muscle, and its dysfunction can lead to significant adverse clinical consequences. The aim of this review is to provide clinicians with an overview of the main causes of uni- and bi-lateral diaphragm dysfunction, explore the clinical and physiological consequences of the disease on lung function, exercise physiology and sleep and review the available diagnostic tools used in the evaluation of diaphragm function. A particular emphasis is placed on the clinical significance of diaphragm weakness in the intensive care unit setting and the use of ultrasound to evaluate diaphragmatic action.

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“…15 In this study, the measurements were made with the subjects supine, but when upright, the diaphragm thickness may be increased. 15 In conclusion, these normal reference values may be helpful for evaluating diaphragm pathologies. BMI, weight, height, and gender correlated significantly with diaphragm thickness.…”

Section: -213mentioning

confidence: 99%