The purpose of this study is to compare the incidence of hypotension between remimazolam and propofol for intraoperative sedation in patients undergoing hip surgery with spinal anesthesia.

Inclusion Criteria:

• ASA physical status 1-3
• Patients scheduled for hip joint surgery under spinal anesthesia and sedation with propofol or remimzolam

Exclusion Criteria:

• Patients who refuse to participate in this study
• Patients with uncontrolled high blood pressure, hyperthyroidism, dementia in the inability to communicate, or symptomatic coronary artery disease
• Patients with an allergy to propofol, fentanyl, or bupivacaine
• Patients contraindicated for spinal anesthesia, such as coagulopathy, severe aortic stenosis/mitral stenosis, and active infection on lumbar region
• Patients judged to be inappropriate for this study