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Efficacy of noninvasive pulse co-oximetry as compared to invasive laboratory-based hemoglobin measurement during spinal anesthesia

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Abstract
BACKGROUND
The Masimo Radical 7 (Masimo Corp., Irvine, CA, USA) pulse co-oximeter(R) noninvasively determines the hemoglobin concentration using the principle of transcutaneous spectrophotometry. We compared hemoglobin levels determined using this device (SpHb) with those determined using an invasive laboratory-based technique (tHb) during spinal anesthesia.
METHODS
Thirty patients received spinal anesthesia with 0.5% hyperbaric bupivacaine. The pulse co-oximeter probe was mounted on the second toe, and arterial blood samples were obtained from a radial artery catheter. SpHb, tHb, and perfusion index (PI) values were recorded before and 20 and 40 min after intrathecal injection of bupivacaine.
RESULTS
Before spinal anesthesia, the SpHb and tHb showed a significant difference of -2.86 +/- 1.56 g/dl (P < 0.005), but no significant differences were found between tHb and SpHb at 20 and 40 min after spinal anesthesia (-0.16 +/- 2.45 g/dl and 0.29 +/- 2.68 g/dl). Additionally, PI was significantly increased at 20 and 40 min after spinal anesthesia compared to the pre-anesthetic value (P < 0.001).
CONCLUSIONS
The toe is not the monitoring site for pulse co-oximetry in adult patients, but the pulse co-oximetry on the toe appears to be appropriate as a noninvasive hemoglobin monitoring device after spinal anesthesia.
All Author(s)
J. H. Chung ; J. Y. Ji ; N. S. Kim ; Y. H. Seo ; H. Y. Gong ; J. W. Kim ; J. B. Kim ; S. H. Yoo
Intsitutional Author(s)
정진헌지재영김난설서용한공형윤김재우
Issued Date
2014
Type
Article
Keyword
HemoglobinPulse co-oximetrySpinal anesthesia
ISSN
1975-5171 ; 2383-7977
Citation Title
Anesthesia and pain medicine
Citation Volume
9
Citation Number
4
Citation Start Page
277
Citation End Page
281
Language(ISO)
eng
URI
http://schca-ir.schmc.ac.kr//handle/2022.oak/330
Appears in Collections:
마취통증의학과 > 1. Journal Papers
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