کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5725740 | 1411549 | 2017 | 8 صفحه PDF | دانلود رایگان |
Rationale and ObjectivesDiaphragmatic motion in a standing position during tidal breathing remains unclear. The purpose of this observational study was to evaluate diaphragmatic motion during tidal breathing in a standing position in a health screening center cohort using dynamic chest radiography in association with participants' demographic characteristics.Materials and MethodsOne hundred seventy-two subjects (103 men; aged 56.3â±â9.8 years) underwent sequential chest radiographs during tidal breathing using dynamic chest radiography with a flat panel detector system. We evaluated the excursions of and peak motion speeds of the diaphragms. Associations between the excursions and participants' demographics (gender, height, weight, body mass index [BMI], smoking history, tidal volume, vital capacity, and forced expiratory volume) were investigated.ResultsThe average excursion of the left diaphragm (14.9â±â4.6âmm, 95% CI 14.2-15.5âmm) was significantly larger than that of the right (11.0â±â4.0âmm, 95% CI 10.4-11.6âmm) (Pâ<0.001). The peak motion speed of the left diaphragm (inspiratory, 16.6â±â4.2âmm/s; expiratory, 13.7â±â4.2âmm/s) was significantly faster than that of the right (inspiratory, 12.4â±â4.4âmm/s; expiratory, 9.4â±â3.8âmm/s) (both Pâ<0.001). Both simple and multiple regression models demonstrated that higher BMI and higher tidal volume were associated with increased excursions of the bilateral diaphragm (all Pâ<0.05).ConclusionsThe average excursions of the diaphragms are 11.0âmm (right) and 14.9âmm (left) during tidal breathing in a standing position. The diaphragmatic motion of the left is significantly larger and faster than that of the right. Higher BMI and tidal volume are associated with increased excursions of the bilateral diaphragm.
Journal: Academic Radiology - Volume 24, Issue 4, April 2017, Pages 393-400