Ultrasonographic measurement of diaphragm thickness in patients with severe thoracic scoliosis

Abstract

Purpose

This study aimed to measure diaphragm thickness using ultrasound in adult patients with severe idiopathic scoliosis.

Methods

This prospective case–control study included patients with severe idiopathic scoliosis and a healthy control group. The control and patient groups’ demographic features, pulmonary function tests, diaphragm thickness, and thickening fraction measured using ultrasonography were compared.

Results

End-expirium values were similar between the two groups (p = 0.902). However, end of inspirium, change level, and diaphragm thickening fraction were significantly lower in the scoliosis group (p < 0.001 for all). Cobb degree values were inversely correlated with forced expiratory volume in 1 s (%) (r =  − 0.909, p < 0.001), forced vital capacity (%) (r =  − 0.887, p < 0.001), and end-inspirium thickness (r =  − 0.673 and p < 0.001) values. Furthermore, diaphragm thickness at the end of inspirium was positively correlated with forced expiratory volume in 1 s (%) (r = 0.636, p = 0.001) and forced vital capacity (%) (r = 0.646, p = 0.001) values. No significant correlation was found between diaphragm thickening fraction and forced expiratory volume in 1 s or forced vital capacity.

Conclusion

Ultrasound can provide valuable information about diaphragm morphology and quantify diaphragm contraction.

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Fig. 1

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This study received no funding.

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Correspondence to Evren Karaali.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Karaali, E., Çiloğlu, O., Görgülü, F.F. et al. Ultrasonographic measurement of diaphragm thickness in patients with severe thoracic scoliosis. J Ultrasound (2021). https://doi.org/10.1007/s40477-020-00536-w

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Keywords

  • Musculoskeletal ultrasound
  • Pulmonary function
  • Cobb angle