Neurological Effects of Goal-directed Fluid Therapy in Beach Chair Position Shoulder Surgery

Efficacy of Perioperative Goal-directed Fluid Therapy in Preventing Cerebral Desaturation and Postoperative Cognitive Dysfunction After Beach Chair Position Shoulder Surgery

Patients receiving beach chair position shoulder surgery are vulnerable to perioperative cerebral desaturation, which is reported to be a risk factor for postoperative cognitive dysfunction. Investigators design this study to test the efficacy of perioperative goal-directed therapy in preventing cerebral desaturation and postoperative cognitive dysfunction in patients receiving beach chair position shoulder surgery.

Inclusion Criteria:

• patients receiving scheduled beach chair position shoulder surgery

Exclusion Criteria:

• pregnant women
• patients in intensive care units
• patients with respiratory failure [forced expiratory volume at one second (FEV1)/ forced vital capacity (FVC) < 70 % and FEV1 < 50%]
• patients with heart failure(NYHA score =III、IV)
• patients with chronic kidney disease (eGFR< 60 ml.min-1.1.73m-2)
• patients with liver failure
• patients with ongoing infection
• patients allergic to voluven