Noninvasive Hemoglobin Monitoring for Maintaining Hemoglobin Concentration Within the Target Range

Inclusion Criteria

• •Adult patients with ASA physical status class I, II, III, who scheduled to undergo elective non-cardiac major surgery with more than moderate risk of bleeding under general anesthesia or spinal anesthesia.
• •Eligible Surgery include: Spine surgery, bone tumor surgery, Total Hip Replacement, ovarian cancer surgery, cervical cancer surgery, radical cystectomy, open retroperitoneal mass excision, Radical Retropubic Prostatectomy, explorative laparotomy for abdominal mass excision, abdominal aortic aneurysm repair
• •Patients who are requiring an arterial catheter as a part of their standard care.