Sex differences in thoracic dimensions and configuration
Sex differences in thoracic dimensions and configuration
复制标题
DOI：
10.1164/rccm.200208-876oc
复制
发表时间：
2003-08-01
影响因子：
24.7
通讯作者：
Couture, J
中科院分区：
文献类型：
--
作者：
Bellemare, F;Jeanneret, A;Couture, J
成年女性的肺体积通常比身高和年龄相同的男性小10-12%。在这项研究中，我们调查了这种体积差异是如何分布在胸腔和横膈膜腹部隔间。使用前后位和侧位胸片，比较了21名正常男性和19名正常女性受试者在三种不同肺容量下的胸廓内尺寸、膈肌相对于脊柱的位置和膈肌长度。在检查的所有肺容量中，与身高相关的女性径向肋骨尺寸比男性更小，肋骨倾斜度更大，相对于脊柱的横隔圆顶位置相当，横隔长度更短。女性受试者表现出更大的吸气胸腔肌肉的贡献，在休息呼吸比男性，大概反映了改善的机械优势赋予这些肌肉的肋骨更大的倾斜。由于肋骨的倾斜度较大，女性肋骨笼可以容纳更大的体积膨胀。结果表明，女性胸腔相对于肺的不成比例的增长，这将非常适合于适应怀孕期间的大腹部容积移位。
The volume of adult female lungs is typically 10-12% smaller than that of males who have the same height and age. In this study, we investigated how this volume difference is distributed between the rib cage and the diaphragm abdomen compartments. Internal rib cage dimensions, diaphragm position relative to spine, and diaphragm length were compared in 21 normal male and 19 normal female subjects at three different lung volumes using anterior-posterior and lateral chest radiographs. At all lung volumes examined, females had smaller radial rib cage dimensions in relationship to height than males, a greater inclination of ribs, a comparable diaphragm dome position relative to the spine, and a shorter diaphragm length. Female subjects exhibited a greater inspiratory rib cage muscle contribution during resting breathing than males, presumably reflecting an improved mechanical advantage conferred to these muscles by the greater inclination of ribs. Because of a greater inclination of ribs, female rib cages could accommodate a greater volume expansion. The results suggest a disproportionate growth of the rib cage in females relative to the lung, which would be well suited to accommodate large abdominal volume displacements as in pregnancy.