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Irish Journal of Medical Science

, Volume 161, Issue 10, pp 582–585 | Cite as

A study of intracolonic hydrogen and methane levels during colonoscopy

  • E. A. Gallagher
  • E. Clarke
  • M. Connor
  • I. Shanahan
  • M. R. Smyth
  • J. R. Lennon
  • J. Crowe
Article

Summary

Gas samples were obtained during colonoscopy for analysis. Patients were prepared with polyethylene glycol (PEG) (N=23), phosphate enema (N=34) and mannitol (N=4). Air insufflation was used in all procedures. High concentrations of hydrogen were detected hi 3 out of 38 gas samples in the PEG group, in 2 of 41 samples in the phosphate enema group and in one of the 8 samples in the mannitol group. All patients had a coexisting intracolonic oxygen concentration > 5%. The results suggest that potentially explosive concentrations of hydrogen may occur after conventional bowel preparations, and that insufflation of carbon dioxide during polypectomy should be a routine.

Keywords

Bowel Preparation Methane Level Phosphate Enema Spectrum Physics SP4270 Explosive Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 1992

Authors and Affiliations

  • E. A. Gallagher
    • 1
    • 2
  • E. Clarke
    • 1
    • 2
  • M. Connor
    • 3
  • I. Shanahan
    • 3
  • M. R. Smyth
    • 3
  • J. R. Lennon
    • 1
    • 2
  • J. Crowe
    • 1
    • 2
  1. 1.Department of GastroenterologyMater HospitalIreland
  2. 2.University College DublinIreland
  3. 3.School of Chemical SciencesDublin City UniversityIreland

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