Effects of PEEP and IRV on Blood Gases in Children under General Anesthesia

• Published in: Nihon Rinshō Masui Gakkai shi Vol. 7; no. 4; pp. 437 - 440
• Main Authors: MORISAKI, Hiroshi, SUZUKI, Gen'ichi, MIYAZAWA, Noriko, KIICHI, Yukou, MISAKI, Toru, SUZUKI, Atsuko
• Format: Journal Article
• Language: English
• Published: THE JAPAN SOCIETY FOR CLINICAL ANESTHESIA 15.07.1987
• ISSN: 0285-4945; 1349-9149
• DOI: 10.2199/jjsca.7.437

The effects of inverse ratio ventilation (IRV) is controvertial. There are few reports with respect to IRV in children. In 20 healthy children with body weight below 20kg IRV and positive end-expiratory pressure ventilation (PEEP) was performed during urological surgery under fentanyl-nitrous oxide-oxygen anesthesia. We analysed arterial and mixed venous blood gases and caluculated oxygen content difference and intrapulmonary shunt. IRV and PEEP were not effective on gas exchange parameters during the whole procedure except the value of PaCO2 in the group IRV (1.7:1) FIO2 0.5. No remarkable influence on circulation was also observed in the all studied groups. Ineffectiveness of IRV and PEEP partly came from that the subjects were healthy children with enough reserved function in cardio-respiratory systems. Other reasons would be many factors during operation such as surgical stimuli, general anesthesia influenced on the pulmonary circulation.