Moeliono Marina, Sari Dian Marta, Nashrulloh Taufiq
Department of Physical Medicine and Rehabilitation, Faculty of Medicine Universitas Padjadjaran, Bandung, Indonesia.
Resident of Physical Medicine and Rehabilitation, Faculty of Medicine Universitas Padjadjaran, Bandung, Indonesia.
Can J Respir Ther. 2022 Mar 17;58:34-38. doi: 10.29390/cjrt-2021-064. eCollection 2022.
The diaphragm is the primary muscle responsible for breathing. Weakness in the diaphragm will result in breathing difficulties. The micro-RPM (respiratory pressure meter) is a non-invasive testing device to measure respiratory muscle strength, which is not always feasible, while thoracic expansion measurements are easy to do.
This study constructs a prediction formula for a maximal inspiratory pressure (MIP) value from thoracic expansion measurements.
This study was quantitative with a cross-sectional design. Participants were healthy adults aged 20-40 years, with normal Mini-Mental State Examinations, body mass index, spirometry, and moderate activity levels. The tests performed were MIP and thoracic expansion measurements at three levels: axilla (L1), the fourth intercostal space (L2), and at processus xiphoideus (L3). The data were analyzed using an unpaired -test and multivariate.
The mean MIP for males (81.51 ± 13.90 cmHO) was significantly greater than females (63.17 ± 15.89 cmHO) ( = 0.0001). These findings were not different with the Chinese, Indian, Mangalorean, and Malaysian populations because they are all of Asian ethnicity. Thoracic expansion L2 ( = 0.463, = 0.0001) and L3 ( = 0.502, = 0.0001) were moderately correlated with MIP, whereas thoracic expansion L2, L3 combined with gender had a weak effect on MIP. The prediction formula was: MIP = 56.802 + 2.387 + L2 + 13.904 + Gender * and MIP = 53.289+ 3.561 + L3 + 9.504 + Gender *, * 0 = female; 1 = male.
A prediction formula for MIP can be made using the thoracic expansion variable with gender as a determinant factor. A quick and easy measurement of thoracic expansion can be used as a mean of screening respiratory muscle strength in patient care.
膈肌是负责呼吸的主要肌肉。膈肌无力会导致呼吸困难。微型RPM（呼吸压力计）是一种测量呼吸肌力量的非侵入性检测设备，但并不总是可行，而胸廓扩张测量则很容易进行。
本研究从胸廓扩张测量构建最大吸气压力（MIP）值的预测公式。
本研究采用横断面设计的定量研究。参与者为20 - 40岁的健康成年人，简易精神状态检查、体重指数、肺量计检查正常，活动水平中等。进行的测试包括在三个水平测量MIP和胸廓扩张：腋窝（L1）、第四肋间间隙（L2）和剑突（L3）。数据采用非配对t检验和多变量分析。
男性的平均MIP（81.51±13.90 cmH₂O）显著高于女性（63.17±15.89 cmH₂O）（P = 0.0001）。这些发现与中国、印度、芒格洛尔和马来西亚人群并无差异，因为他们均为亚洲人种。胸廓扩张L2（r = 0.463，P = 0.0001）和L3（r = 0.502，P = 0.0001）与MIP中度相关，而胸廓扩张L2、L3与性别相结合对MIP的影响较弱。预测公式为：MIP = 56.802 + 2.387×L2 + 13.904×L3 + 性别×系数，性别中0 = 女性；1 = 男性。以及MIP = 53.289 + 3.561×L2 + 9.504×L3 + 性别×系数，性别中0 = 女性；1 = 男性。
可以使用胸廓扩张变量并以性别作为决定因素来制定MIP的预测公式。快速简便的胸廓扩张测量可作为患者护理中筛查呼吸肌力量的一种手段。
