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Korean Journal of Anesthesiology 1988;21(5):759-763.
DOI: https://doi.org/10.4097/kjae.1988.21.5.759   
Pulse Oximetry during Shunt Surgery in Pediatric Patients with Tetralogy of Fallot .
Hung Kun Oh, Wyun Kon Park, Soon Ho Nam, Suh Ouk Bang, Sung Cuk Cho
Department of Anesthesiology, Yonsei University College of Medicine, Seoul, Korea.
Pulse oximetry is a relatively new and noninvasive technique for measuring O2 saturation continuously. We applied pulse oximetry to 9 pediatric patients with tetralogy of Fallot during shunt surgery. Arterial blood gas tensions were measured at the time of postinduction, just before insertion of the shunt, after the shunt and at the end of the operation. The SaO2 levels by blood gas analysis were compared with the SpO2 levels as measured by pulse oximetry. SaO2 and SpO2 levels increased after the shunt and at the end of the operation in comparison with before the shunt, but the PaO2 level remained the same in each period. The SaO2 and SpO2 levels were identical in all 4 periods. The pH increased at the end of the operation in comparison with the postinduction. In conclusion, continuous monitoring of SpO2 through pulse oximetry, instead of PaO2 is a very useful method to assess the adequacy of perfusion after the shunt. Pulse oximetry is also a valuable tool with which to choose the site of the pulmonary artery to be shunted.
Key Words: Measurement techniques; pulse oximetry Blood; hemoglobin; saturation


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