Current Use of Noninvasive Hemoglobin Monitoring in Anesthesia

Abstract

Modern technology enables clinicians to assess hemoglobin levels noninvasively and continuously. Some instruments also provide concentrations of other types of hemoglobin, such as methemoglobin and carboxyhemoglobin. Such information obtained immediately and noninvasively can be helpful in the management of critically ill patients or those undergoing surgery with bleeding. However, the accuracy of noninvasive hemoglobin measurements should be evaluated before clinical application, particularly for transfusion decisions. Clinicians should be aware of the performance of continuous noninvasive hemoglobin monitoring devices during anesthesia and of the various factors that influence their accuracy. This review considers the accuracy of current continuous noninvasive hemoglobin monitoring and its clinical use.

Can Non-Invasive Spectrophotometric Hemoglobin Replace Laboratory Hemoglobin Concentrations for Preoperative Anemia Screening? A Diagnostic Test Accuracy Study

“…Others exclusion criteria included vascular surgery, pediatric surgery, hemodynamically unstable patients, and those admitted following major trauma with blood loss, missing data, and hepatic and jaundiced patients. Elective general and orthopedic surgery were only included to avoid the reported effects of specific types of surgery on the SpHb values [12,15].…”

“…This diversity between various researchers motivated our team to design this current research to study the Masimo Radical-7 performance as a non-invasive hemoglobin monitor. This device utilizes multiple wavelengths of light (500-1300 nm) to measure the fractional hemoglobin and calculate the total hemoglobin concentration [12,13]. The primary aim of this study was to measure the non-invasive SpHb (g/dL) among adults prior to surgery and to investigate SpHb correlation and agreement with laboratory hemoglobin (Hb, g/dl), which was measured within 24 h of planned anesthesia and surgery.…”

Accuracy and trending capability of haemoglobin measurement by noninvasive pulse co-oximetry in anaesthetized horses

“…According to the Radical-7 manufacturer, the PI value has a definite influence on SpHb accuracy and obtaining SpHb values, and a PI ! 1.4% was recommended (Lee et al 2014). To assess the influence of the PI, in the present study the PI values were used to separate the SpHb pairs of data into two groups (PI < 1% group and PI !…”

Continuous noninvasive hemoglobin monitoring

“…Coquin et al [8] investigated the accuracy in critically ill patients with gastrointestinal bleeding, and found that the number of unavailable measurements associated with inadequate perfusion index values was significantly higher in patients with noradrenaline administration (42% versus 15%, P < 0.05). In addition, as Lee et al [30] indicated in the recent review, the presence of peripheral vascular disorders can affect the accuracy of NIHb measurement. Thus, vasopressor administration and other causes of decreased peripheral perfusion can lead to an inadequate accuracy of NIHb monitoring.…”