| The influence of the CO(2) pneumoperitoneum on a rat model of intestinal anastomosis healing. | |
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MedLine Citation:
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PMID: 22179471 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: The CO(2) pneumoperitoneum, which is used for laparoscopic surgery, causes local and systemic effects in patients. Concern arises about what the pressurized anoxic environment of the CO(2) pneumoperitoneum has on intestinal healing. Earlier experimental work showed a negative correlation between intestinal healing and the applied intra-abdominal pressure. To further elucidate this, we developed a rat model, in which enterotomy healing can be compared after open or laparoscopic surgery. Possible mechanisms of injury, such as impaired neoangiogenesis or injury through hypoxia-induced pathways were studied. METHODS: A new experimental mechanically ventilated rat model was developed. An enterotomy was made and closed via laparotomy (group I) or laparoscopy under CO(2) pressures of 5 mmHg (group II) or 10 mmHg (group III). Intestinal healing was tested in vivo after 1 week by bursting-pressure analysis. The effect of the operative procedure on neoangiogenesis was tested by counting factor VIII positive vessels in biopsies of the perianastomotic granulation tissue after 1 week. Intestinal anoxia was tested by quantifying HIF-1α protein levels in intestinal biopsies, taken before the enterotomy closure. RESULTS: The bursting pressures were significantly lower after laparoscopic surgery at 10 mmHg CO(2) pneumoperitoneum (group III) compared with rats that had undergone open surgery (group I) or laparoscopic surgery at 5 mmHg CO(2) pneumoperitoneum (group II). There was no significant quantitative difference between the three groups in the neoangiogenesis nor was there a difference in the amount of HIF-1α measured in the intestinal biopsies. CONCLUSIONS: We developed a surgical model that is well fitted to study the effects of pneumoperitoneum on intestinal healing. With this model, we found further evidence of CO(2) pressure-dependant hampered intestinal healing. These differences could not be explained by difference in neoangiogenesis nor local upregulation of hypoxic factors. |
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Authors:
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Stefaan H A J Tytgat; Ger T Rijkers; David C van der Zee |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-17 |
Journal Detail:
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Title: Surgical endoscopy Volume: - ISSN: 1432-2218 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8806653 Medline TA: Surg Endosc Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Pediatric Surgery, Wilhelmina Children's Hospital, University Medical Center Utrecht, KE.04.140.5, P.O. Box 85090, 3508, AB, Utrecht, The Netherlands, s.tytgat@umcutrecht.nl. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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