Medical & Biological Engineering & Computing

, Volume 48, Issue 2, pp 133–137

Increase in intrathoracic volume in pectus excavatum patients after the Nuss procedure

  • Pei-Yeh Chang
  • Zhen-Yu Hsu
  • Jin-Yao Lai
  • Chao-Jan Wang
  • Yu-Tai Ching
Original Article

DOI: 10.1007/s11517-009-0570-9

Cite this article as:
Chang, PY., Hsu, ZY., Lai, JY. et al. Med Biol Eng Comput (2010) 48: 133. doi:10.1007/s11517-009-0570-9

Abstract

In this study, we present finite element analysis models to calculate the increase in intrathoracic volume of pectus excavatum patients after the Nuss procedure. One virtue of our approach is that the measurement of the intrathoracic volume has no time difference and is not affected by postoperative pain, which cannot be achieved with a 2-year difference between pre- and postoperative pulmonary function testing or any other clinical method. The calculations show that the intrathoracic volume of pectus excavatum patients increased by approximately 2.72–8.88% after the Nuss procedure. The increment curve was patient-dependent, although the increment behavior was similar among the six patients examined. The curve of the increase became flat when the elevating force exceeded 80 N or the displacement of the lower sternal end exceeded 2.6 cm in half of our cases.

Keywords

Pectus excavatumIntrathoracic volumePulmonary functionNuss procedureFinite element model

Copyright information

© International Federation for Medical and Biological Engineering 2009

Authors and Affiliations

  • Pei-Yeh Chang
    • 1
  • Zhen-Yu Hsu
    • 2
  • Jin-Yao Lai
    • 1
  • Chao-Jan Wang
    • 3
  • Yu-Tai Ching
    • 4
  1. 1.Division of Pediatric Surgery, Department of Surgery, Chang Gung Memorial Hospital at LinkouCollege of Medicine, Chang Gung UniversityTaoyuanTaiwan
  2. 2.Department of Mechanical EngineeringNational Chiao-Tung UniversityHsinchuTaiwan
  3. 3.Department of Radiology, Chang Gung Memorial Hospital at LinkouCollege of Medicine, Chang Gung UniversityTaoyuanTaiwan
  4. 4.Department of Computer ScienceNational Chiao Tung UniversityHsinchuTaiwan