Evaluation the effect of breathing filters on end-tidal carbon dioxide during inferior abdominal surgery in infants and changes of tidal volume and respiratory rate needs for preventing of increasing end-tidal carbon dioxide.

Background: The aim of this study was to prevent of increasing end-tidal carbon dioxide (ETCO with changing of vital capacity and respiratory rate when using of birthing filter in infants.

Materials And Methods: In a randomized clinical trial study, ninety-four infant' patients were studied in three groups. Basic values, such as peak inspiratory pressure, tidal volume, minute ventilation, respiratory rate, and partial pressure of ET CO (PETCO) level had been evaluated after intubation, 10 min after intubation and 10 min after filter insertion.