This study will further investigate the Masimo SpHb \[FDA Approved\] continuous non-invasive hemoglobin monitor in spine surgery patients. (See NCT00792597) We will investigate the effect of enhanced circulation to the finger (which will be attached to the sensor) following a local injection (digital block) of lidocaine (an FDA approved local anesthetic), and assess the accuracy of the SpHb reading as it relates to a standard laboratory hemoglobin value (tHb).
We have completed a study with 20 patients using the latest version of the SpHb monitor software and finger sensor. The purpose of this study is to assess the accuracy of the SpHb reading as it relates to a standard laboratory hemoglobin value (tHb) following the digital block.
Study Type
INTERVENTIONAL
Allocation
NA
Masking
NONE
Enrollment
20
One dose of lidocaine 2% injected locally into one finger (2 mls total)
Masimo SpHb continuous hemoglobin monitor
University of California San Francisco
San Francisco, California, United States
Categorical Groups Based on Magnitude of Differences Between Noninvasive (SpHb) and Laboratory Co-Oximeter (tHb) Hemoglobin in Patients With a Finger Regional Anesthetic Block.
Time frame: A minimum of 2-4 differences recorded approximately hourly during surgery
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