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Inter- and intraindividual variabilities of perforation forces of human and pig bowel tissue

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Abstract

Background: A laparoscopic bowel grasper should be suitable for safely grasping the bowel in a wide variety of patients. Therefore, the inter- and intraindividual variabilities in the strength of bowel tissue to resist perforation force should be analyzed. Methods: The large and small bowels of pigs (n = 14) and the human small bowel (n = 7) were clamped between two hemispheres 1.5 mm in diameter. The pinch force was increased until the tissue was perforated. Results: The perforation force for the pig large bowel was higher than for the small bowel (13.5 ± 3.7 vs 11.0 ± 2.5 N; p = 0.014). No difference was found between the human and pig small bowel (10.3 ± 2.9 vs 11.0 ± 2.5 N). The intercoefficient of variation varied between 22% and 28%, and the intracoefficient of variation varied between 14% and 18%. Conclusions: The strength of the pig bowel is approximately comparable to the strength of the human bowel, and, therefore, testing of graspers on pig bowel is justified. However, due to the large interindividual variation, large safety margins should be taken into account.

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Acknowledgments

The authors thank the departments of Experimental Surgery and Experimental Cardiology of the Academic Medical Center, Amsterdam, for providing the animals and the possibility of performing the experiments.

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Authors and Affiliations

  1. Man-Machine Systems Group, Faculty of Mechanical Engineering and Marine Technology, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands

    E. A. M. Heijnsdijk, H. de Visser & J. Dankelman

  2. Department of Surgery, Academic Medical Center, University of Amsterdam, P.O. Box 22700, 1100 DE, Amsterdam, The Netherlands

    E. A. M. Heijnsdijk, M. van der Voort & D. J. Gouma

Authors
  1. E. A. M. Heijnsdijk
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  2. M. van der Voort
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  3. H. de Visser
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  4. J. Dankelman
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  5. D. J. Gouma
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Correspondence to E. A. M. Heijnsdijk.

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Heijnsdijk, E., van der Voort, M., de Visser, H. et al. Inter- and intraindividual variabilities of perforation forces of human and pig bowel tissue . Surg Endosc 17, 1923–1926 (2003). https://doi.org/10.1007/s00464-003-9002-3

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  • DOI: https://doi.org/10.1007/s00464-003-9002-3

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