A novel inflatable belt-type clamp in open heart surgery

Chih-yung Wen, C. Y. Lee, H. Y. Yu, H. T. Chang

Research output: Journal article publicationJournal articleAcademic researchpeer-review


In this study, a novel inflatable belt-type clamp is introduced and its performance is verified. Finite element simulations are performed to compare the performance of three different aorta clamping systems. In every case, the aorta is modeled as a simple hollow cylinder made of linearly elastic material. For a traditional surgical clamp in which the jaws remain inclined to one another as they close around the aorta, the maximum normal stress within the aorta wall is found to be 806kPa. It is shown that the numerical results are in good qualitative agreement with the experimental results obtained using a pressure sensitive film. The simulation results for a modified clamp in which the jaws remain parallel during the clamping operation show that the maximum normal stress is reduced to 222kPa. However, two regions of maximum stress are induced within the aorta wall. Finally, the numerical results for a novel inflatable belt-type clamp show that the maximum normal stress is equal to approximately 221kPa. In contrast to the modified clamp, the stress is uniformly distributed around the perimeter of the aorta, and thus the risk of aortic dissection is significantly reduced.
Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalJournal of Mechanics
Issue number1
Publication statusPublished - 1 Mar 2011
Externally publishedYes


  • Aortic cross-clamping
  • Aortic dissection
  • Finite-element analysis

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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