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KMID : 1155520140090040277
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Anesthesia and Pain Medicine
2014 Volume.9 No. 4 p.277 ~ p.281
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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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Chung Jin-Hun
Ji Jae-Young
Kim Nan-Seol
Seo Yong-Han
Gong Hyung-Youn
Kim Jae-Woo
Kim Jong-Bun
Yoo Sie-Hyeon
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Abstract
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Background: The Masimo Radical 7 (Masimo Corp., Irvine, CA, USA) pulse co-oximeterⓡ 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. (Anesth Pain Med 2014; 9: 277-281)
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KEYWORD
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Hemoglobin, Pulse co-oximetry, Spinal anesthesia
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