title: Prediction of fluid responsiveness in the beach chair position using dynamic preload indices.
abstract: Hemodynamic instability in the beach chair position (BCP) may lead to adverse outcomes. Cardiac preload optimization is a prerequisite to improve hemodynamics. We evaluated the clinical usefulness of dynamic indices for the prediction of fluid responsiveness in BCP patients under general anesthesia. Forty-two patients in the BCP under mechanical ventilation received colloids at 6 ml/kg for 10 min. Stroke volume variation (SVV), pulse pressure variation (PPV), pleth variability index (PVI), and hemodynamic data were measured before and after the fluid challenge. Patients were considered responders to volume expansion if the stroke volume index increased by ≥15 %. The areas under receiver operating characteristic curves for SVV, PPV and PVI were 0.83, 0.81 and 0.74, respectively (p < 0.05), with the corresponding optimal cut-off values of 12, 15 and 10 %. SVV, PPV and PVI can be used to predict fluid responsiveness in the BCP under mechanical ventilation.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.|Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Su Hyun
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery, Arthroscopy and Joint Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Yong-Min
authors.initials: YM
authors.lastname: Chun
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.|Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Young Jun
authors.initials: YJ
authors.lastname: Oh
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.|Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Seokyung
authors.initials: S
authors.lastname: Shin
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.|Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.
authors.forename: Soo Young
authors.initials: SY
authors.lastname: Kim
authors.affiliation: Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea. YSCHOI@yuhs.ac.|Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea. YSCHOI@yuhs.ac.
authors.forename: Yong Seon
authors.initials: YS
authors.lastname: Choi
mesh_terms: D000368:Aged; D000758:Anesthesia; D019540:Area Under Curve; D001182:Arthroscopy / Q000379:methods; D001794:Blood Pressure; D004452:Echocardiography / Q000379:methods; D005260:Female; D005440:Fluid Therapy / Q000379:methods*; D006339:Heart Rate; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D056888:Patient Positioning; D010991:Plethysmography / Q000379:methods*; D011187:Posture; D011446:Prospective Studies; D012372:ROC Curve; D012121:Respiration, Artificial; D012680:Sensitivity and Specificity; D013318:Stroke Volume
keywords: Beach chair position; Fluid responsiveness; Pleth variability index; Pulse pressure variation; Stroke volume variation