Noninvasive Hemoglobin Monitoring for Maintaining Hemoglobin Concentration Within the Target Range

Use of Noninvasive Hemoglobin Monitoring for Maintaining Hemoglobin Concentration Within the Target Range During Major Surgery: A Randomized Controlled Trial

The primary aim of this study is to evaluate whether pulse oximetry based noninvasive hemoglobin (SpHb) monitoring can reduce the incidence of hemoglobin (Hb) level out of the target range in adult patients undergoing major surgery with the potential risk of bleeding.

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.

Exclusion Criteria:

• Patients with preexisting deformity or skin condition that would impede sensor placement
• Patients with allergies to the adhesive sensor material
• Patients with uncorrected preoperative anemia (preoperative hemoglobin < 7 g/dL)
• Patients who were not suitable for participation in the opinion of the study investigator.