title: An infant circuit with a water vaporizer warmed by carbon dioxide neutralization.
abstract: A pediatric anesthesia system was constructed by connecting the machine end of a modified Mapleson D system to a soda lime canister containing a water vaporizer heated through the reaction of neutralization of the lime by the CO2 emerging from the breathing tube. The vaporizer was placed in line with the fresh-gas delivery tube of the circuit. The humidity output of the system varied from 15 +/- 1 mg H2O/L with a CO2 output of 15 ml/L to 27 +/- 1.5 mg H2O/L with a CO2 output of 60 ml/min. Rebreathing of CO2 was within acceptable limits as long as fresh-gas inflow remained at 5 L/min. The system compares favorably in respect to its humidity output with all other circuits availabe on the market for pediatric anesthesia.
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D002245:Carbon Dioxide; D002648:Child; D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D006358:Hot Temperature; D006801:Humans; D006813:Humidity; D007223:Infant; D014835:Volatilization
chemical_list: D002245:Carbon Dioxide