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Inclusion of an S-nitrosylating agent in the insufflating gas does not alter gastric activity in rats following pneumoperitoneum

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Abstract

Background

We have previously shown that mixing the S-nitrosylating agent ethyl nitrite with carbon dioxide can attenuate pneumoperitoneum-induced decreases in splanchnic blood flow, but it was unclear if this agent would alter gastric function. This question was answered using rats by assessing gastric emptying and gastrointestinal transit times following gavage with radioactive chromium.

Methods

There were five experimental groups: absolute control, anesthesia control, and carbon dioxide alone or with 100 or 300 parts per million ethyl nitrite. The period of insufflation was 1 h, and all animals were euthanized 6.5 h after chromium administration.

Results

The mean amount of radioactivity remaining in the stomach ranged between 16% and 27% of the total administered; these differences were not statistically significant (p > 0.05). Modest differences in chromium distribution were identified in the gastrointestinal tract, but for all treatments, the peak amount of radioactivity was located in the distal portion. Location of the peak, expressed as a percentage of total tract length, varied between 70% and 85% (p = 0.366).

Conclusions

This study found no adverse effect of ethyl nitrite on postoperative gastric emptying or gastrointestinal transit time following pneumoperitoneum. The findings support continued assessment of the clinical utility of ethyl nitrite in the setting of laparoscopic surgery.

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Acknowledgments

This work was supported in part by the National Institutes of Health (grant HD 042471) and by an unrestricted educational grant from Nitrox, LLC, a company that is developing strategies for treating disorders of oxygen delivery. Both J.S.S. and J.D.R. have consulting agreements with this company. A portion of these findings was presented at the Society of American Gastrointestinal and Endoscopic Surgeons 2005 Annual Meeting, Ft. Lauderdale FL.

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Authors and Affiliations

  1. Department of Anesthesiology, Duke Endosurgery Center, Duke University Medical Center, Room 119, Research Park 4, Durham, North Carolina, 27710, United States

    M. K. Shah, K. Shimazutsu, K. Uemura & J. D. Reynolds

  2. Department of Surgery, Duke Endosurgery Center, Duke University Medical Center, Room 119, Research Park 4, Durham, North Carolina, 27710, United States

    T. Takahashi & J. D. Reynolds

  3. Department of Medicine, Duke Endosurgery Center, Duke University Medical Center, Room 119, Research Park 4, Durham, North Carolina, 27710, United States

    J. S. Stamler

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  1. M. K. Shah
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  2. K. Shimazutsu
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  3. K. Uemura
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  4. T. Takahashi
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  5. J. S. Stamler
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  6. J. D. Reynolds
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Correspondence to J. D. Reynolds.

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Shah, M.K., Shimazutsu, K., Uemura, K. et al. Inclusion of an S-nitrosylating agent in the insufflating gas does not alter gastric activity in rats following pneumoperitoneum. Surg Endosc 21, 1354–1358 (2007). https://doi.org/10.1007/s00464-006-9107-6

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  • DOI: https://doi.org/10.1007/s00464-006-9107-6

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