Practical Geriatrics ›› 2022, Vol. 36 ›› Issue (11): 1101-1105.doi: 10.3969/j.issn.1003-9198.2022.11.006

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Morphological changes of diaphragm and related factors in elderly patients with AECOPD

LI Yan, WANG Xiao-xiao, SUN Li, NAN Shu-liang, HUO Shu-fen, REN Xiao-ping, WANG Shui-li, WEN Hong-xia   

  1. LI Yan, WANG Xiao-xiao, SUN Li, HUO Shu-fen, REN Xiao-ping, WEN Hong-xia. Department of Geriatric Respiration Medicine; NAN Shu-liang. Center of Ultrasonic Diagnosis; WANG Shui-li. The First Department of Respiratory Medicine, Shaanxi Provincial People's Hospital, Xi'an 710068, China
  • Received:2021-11-23 Online:2022-11-20 Published:2022-11-24

Abstract: Objective To analyze the morphological changes of diaphragm and the related factors in the elderly patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). Methods A total of 58 elderly AECOPD inpatients admitted to Shaanxi Provincial People's Hospital were collected as the AECOPD group, and 49 healthy subjects were collected as the control group. The diaphragm thickness at function residual capacity(TdiFRC), diaphragm thickness at forced vital capacity(TdiFVC), diaphragm thickness at residual volume(TdiRV), diaphragmatic displacement during tidal breathing (DD) and diaphragmatic displacement during forced breathing (DDmax) were measured by using Ultrasonography, then the thickening fraction (TF) was calculated. All the indicators between the two groups were compared and multiple linear regression was used to analyze the influencing factors of TF and DD. Results The AECOPD patients were divided into two groups according to GOLD classification: mild-moderate group and severe-very severe group. Compared with the control group and the mild-moderate group, the severe-very severe group showed significantly difference in TdiFRC, TdiRV, DD, DDmax and TF values (all P<0.05);And mild-moderate group showed lower level in TdiFVC,DDmax and TF than those in the control group ( all P<0.05). TF was positively correlated with forced expiratory volume in 1 second percentage predicted (FEV1%pred) (β=0.547, P<0.05), and negtively correlated with the duration of COPD (β=-0.959, P<0.05) and the number of acute exacerbations in the past 1 year (β=-5.978, P<0.05), while DD was lowly negatively correlated with the duration of COPD (β=-0.027, P<0.05) and the number of acute exacerbations within 1 year (β=-0.150, P<0.05). Conclusions Both TF and DDmax in the elderly patients with AECOPD decrease significantly, which are mainly affected by the disease itself, and it is necessary to actively control the progression of COPD and reduce the frequency of exacerbation.

Key words: acute exacerbation of chronic obstructive pulmonary disease, ultrasonography, diaphragm

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