Ultrasound in detection of diaphragmatic motion in diagnosis of chronic obstructive pulmonary disease / 中国医学影像技术

ABSTRACT

Objective To explore diagnostic value of diaphragmatic movement amplitude and time from head to tail measured with M-mode ultrasonography in diagnosis of chronic obstructive pulmonary disease (COPD).Methods Totally 68 patients with stable COPD (COPD group) and 68 healthy volunteers (control group) were examined with M-mode ultrasonography.Diaphragmatic movement amplitude and time from head to tail were recorded.The amplitude and time of diaphragmatic muscle between calm breathing and deep breathing were compared.The correlation between diaphragm motion amplitude and pulmonary function was analyzed.ROC curve was used to observe the efficacy of M-mode ultrasound in diagnosis of COPD.Results At calm breathing,the amplitudes of bilateral diaphragm movement in COPD group were greater than those in control group.At deep breathing,the amplitudes of bilateral diaphragm movement in control group were greater than those in COPD group.The right diaphragmatic movement time of control group was longer than that of COPD group at both calm and deep breathing (all P＜0.05).During deep breathing,the amplitude of diaphragm motion was positively correlated with forced expiratory volume in one second (FEV1) and FEV1/forced vital capacity (all P＜0.05).In calm and deep breathing,the area under the ROC curve (AUC) of diaphragmatic motion in the diagnosis of COPD was 0.823 and 0.858,and AUC of diaphragmatic movement time was 0.620 and 0.678,respectively.Conclusion Using M-mode ultrasonography can quickly assess diaphragmatic function by judging diaphragm motion,therefore being helpful to diagnosis of COPD.