An investigation into the use of ultrasound as a surrogate measure of diaphragm function

作者：Holtzhausen Samantha; Unger Marianne; Lupton Smith Alison^*; Hanekom Susan

来源：Heart & Lung, 2018, 47(4): 418-424.

DOI：10.1016/j.hrtlng.2018.04.010

• Diaphragm function
• Ultrasonography
• Ventilator induced diaphragm dysfunction
• Respiratory muscle strength
• Diaphragm thickness

Purpose: Sonographic assessment of the diaphragm may be a surrogate for interpretation of diaphragm function in mechanically ventilated patients. This study aimed to determine the correlation between respiratory muscle function and diaphragm thickness in a healthy population.
Methods: A descriptive study was conducted. Diaphragm thickness was determined by sonographic measurement. Respiratory muscle strength, fatigue and endurance was determined using a mouth pressure manometer.
Results: 55 subjects with a mean (SD) age 21.16 +/- 1.55 years were studied. Diaphragm thickness was moderately correlated with strength (r = 0.52; r(2)=0.27; p < 0.001). Respiratory muscle fatigue was not correlated with thickness (r=-0.15; r(2)=0.02; p = 0.29) or strength (r=-0.19; r(2)=0.04; p = 0.16).
Conclusion: Diaphragm thickness was moderately correlated to strength but not to fatigue or endurance in healthy individuals. Sonography may be a surrogate measure of volitional respiratory muscle strength and requires confirmation in critically ill patients.

• 出版日期2018-8