Comment on

• The role of carbon dioxide insufflation in colonoscopy: a systematic review and meta-analysis.

  Wu J, Hu B. Wu J, et al. Endoscopy. 2012 Feb;44(2):128-36. doi: 10.1055/s-0031-1291487. Epub 2012 Jan 23. Endoscopy. 2012. PMID: 22271023
• Capnographic monitoring reduces the incidence of arterial oxygen desaturation and hypoxemia during propofol sedation for colonoscopy: a randomized, controlled study (ColoCap Study).

  Beitz A, Riphaus A, Meining A, Kronshage T, Geist C, Wagenpfeil S, Weber A, Jung A, Bajbouj M, Pox C, Schneider G, Schmid RM, Wehrmann T, von Delius S. Beitz A, et al. Am J Gastroenterol. 2012 Aug;107(8):1205-12. doi: 10.1038/ajg.2012.136. Epub 2012 May 29. Am J Gastroenterol. 2012. PMID: 22641306 Clinical Trial.
• Water-aided colonoscopy: a systematic review.

  Leung FW, Amato A, Ell C, Friedland S, Harker JO, Hsieh YH, Leung JW, Mann SK, Paggi S, Pohl J, Radaelli F, Ramirez FC, Siao-Salera R, Terruzzi V. Leung FW, et al. Gastrointest Endosc. 2012 Sep;76(3):657-66. doi: 10.1016/j.gie.2012.04.467. Gastrointest Endosc. 2012. PMID: 22898423
• Warm water infusion colonoscopy: a review and meta-analysis.

  Rabenstein T, Radaelli F, Zolk O. Rabenstein T, et al. Endoscopy. 2012 Oct;44(10):940-51. doi: 10.1055/s-0032-1310157. Epub 2012 Sep 17. Endoscopy. 2012. PMID: 22987214
• Propofol combined with traditional sedative agents versus propofol- alone sedation for gastrointestinal endoscopy: a meta-analysis.

  Wang D, Wang S, Chen J, Xu Y, Chen C, Long A, Zhu Z, Liu J, Deng D, Chen J, Tang D, Wang L. Wang D, et al. Scand J Gastroenterol. 2013 Jan;48(1):101-10. doi: 10.3109/00365521.2012.737360. Epub 2012 Oct 31. Scand J Gastroenterol. 2013. PMID: 23110510
• Sedation in screening colonoscopy: impact on quality indicators and complications.

  Bannert C, Reinhart K, Dunkler D, Trauner M, Renner F, Knoflach P, Ferlitsch A, Weiss W, Ferlitsch M. Bannert C, et al. Am J Gastroenterol. 2012 Dec;107(12):1837-48. doi: 10.1038/ajg.2012.347. Epub 2012 Nov 13. Am J Gastroenterol. 2012. PMID: 23147522