Association of Preoperative Sarcopenia and Intraoperative Hypotension in Patients Undergoing Minimally Invasive Pylorus Preserving Pancreaticoduodenectomy : Prospective Observational Study

Inclusion Criteria: 1\. patients 20 years or older who undergo minimally invasive pylorus preserving pancreaticoduodenectomy Exclusion Criteria: 1. emergency surgery 2. patients who cannot read consent forms(e.g., illiterate, foreigner, etc.) 3. patients with cognitive dysfunction 4. pregnant, lactating women 5. When hand grip test cannot be performed 6. patients with atrial fibrillation, moderate or severe valvular heart disease, left ventricular ejection fraction less than 35%