MASIMO Radical 7 and Laboratory Measurement

Present study aimed to evaluate the accuracy of Masimo Radical 7 to monitor hemoglobin concentrations through compared with laboratory measurement during major hepatic surgery, and to determine the source of discordance between two methods.

Inclusion Criteria:

• adult patients
• American Society of Anesthesiologists Physical Status Ⅰor Ⅱ
• scheduled for potentially hemorrhagic major hepatic resection under general anesthesia
• requiring an arterial line

Exclusion Criteria:

• coagulopathy
• hemoglobinopathy
• cardiac dysrhythmias
• arrhythmia
• intracardiac shunt
• heart valve diseases
• tinea unguium
• arterio puncture failure