Mathew O P, Pronske M L, Clark M L
Department of Pediatrics, University of Texas Medical Branch, Galveston 77550.
Pediatr Pulmonol. 1988;4(3):134-8. doi: 10.1002/ppul.1950040303.
Changes in the relative contribution of ribcage and abdomen during augmented breaths were assessed in two groups of infants (less than 2 weeks and 4-12 weeks old). In both groups ribcage and abdominal movements increased during augmented breaths in quiet sleep. In the older infants the relative increase was greater for the ribcage (P less than 0.05) when expressed either as a ribcage to abdominal movement ratio or as a percent of the respective movements during control breaths. In contrast, no significant change of the relative contribution was observed in the younger age group. During active sleep paradoxical movement of the ribcage, observed during tidal breaths, continued during the first phase of the augmented breath; however, during the second phase of inspiration, the ribcage moved outward in all but one infant. Our results show that marked increases in tidal volume are associated with greater increases in ribcage contribution in infants beyond the neonatal period. This may reflect differences in recruitment patterns of intercostal muscles during development.
在两组婴儿（小于2周龄和4 - 12周龄）中评估了增强呼吸期间胸廓和腹部相对贡献的变化。在两组中，安静睡眠时增强呼吸期间胸廓和腹部运动均增加。在较大婴儿中，当以胸廓与腹部运动比值或对照呼吸期间各自运动的百分比表示时，胸廓的相对增加更大（P小于0.05）。相比之下，在较年幼的年龄组中未观察到相对贡献的显著变化。在主动睡眠期间，潮式呼吸时观察到的胸廓反常运动在增强呼吸的第一阶段持续存在；然而，在吸气的第二阶段，除一名婴儿外，所有婴儿的胸廓均向外移动。我们的结果表明，潮气量的显著增加与新生儿期后的婴儿胸廓贡献的更大增加相关。这可能反映了发育过程中肋间肌募集模式的差异。
