Carbon Dioxide versus Water for Cystoscopy: a Comparative Study

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Abstract
In a prospective study of 120 patients, cytoscopic views provided by CO2 insufflation of the bladder were compared with views obtained during standard water cystoscopy. Clarity of vision was uniformly good during CO2 cystoscopy and in 21 patients with hematuria the views were significantly better than those obtained by standard water cystoscopy. There was no evidence of any significant absorption of CO2. This safe and simple technique would seem to have considerable advantages in the investigation of patients with hematuria.

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