Value of Pulse Pressure Variations and Corrected Flow Time in Esophageal Doppler as a Predictor of Fluid Responsiveness in Prone Position During Spinal Surgery
Conditions
- Elective Posterior Lumbar Spinal Fusion
Interventions
- DEVICE: 1.Esophageal doppler monitor
- DEVICE: 2. philips Intelivue MP70 monitors
Sponsor
Yonsei University