Inclusion Criteria:  Age ≥ 20 years Requiring general anesthesia and continuous blood pressure measurement with a radial arterial line Limb circumference is within 22 cm - 32 cm The width of the first knuckle of the index/middle/Ring finger is less than 19.8 mm Ease of access to the finger and arm used for ArteVu Able to provide written informed consent for participation in the study  Exclusion Criteria:  Pregnant patients Medical or surgical condition that prevents the ability to apply the ArteVu device on an upper extremity finger or the ipsilateral arm such as impaired skin integrity Operations involving the upper extremities or the blood vessels of the upper extremities Arthritis or severe deformities of the hand and fingers Prosthetic devices or jewelry that cannot be removed from the finger or the ipsilateral arm to be used for the ArteVu device History of malignant hyperthermia Raynaud's disease affecting the fingers or hands Topical allergy to Acrylonitrile Butadiene Styrene(ABS), Polycarbonate(PC), or silicone Swelling, edema or lymphedema of the upper extremity Participants with upper extremity occlusive peripheral vascular diseases Inability of the patient to provide written informed consent