Age-related changes in chest geometry during cardiopulmonary resuscitation

• DOI: 10.1152/jappl.1987.62.6.2212
• Publication Date: 2017-12-21T11:52:36Z
• Authors: J. M. Dean; R. C. Koehler; C. L. Schleien; J. R. Michael; T. Chantarojanasiri; M. C. Rogers; R. J. Traystman
• Keywords: Pulsatile flow; Sternum; Chest tube; Elastic recoil

We studied alterations of chest geometry during conventional cardiopulmonary resuscitation in anesthetized immature swine. Pulsatile force was applied to the sternum increments determine effects increasing compression on and intrathoracic vascular pressures. In 2-wk- 1-mo-old piglets, permanent changes shape developed due incomplete recoil along anteroposterior axis, large pressures were generated. 3-mo-old animals, deformity did not develop, produced. propose a theoretical model as an elliptic cylinder. displacement minor axis ellipse produces greater decrease cross-sectional area than circular cross section. As thoracic section became less deformity, volume, hence pressure, With extreme at high force, pulsatile limited, diminishing pressure generation. conclude that are important producing intravascular piglets.