Efficacy of noninvasive pulse co-oximetry as compared to invasive laboratory-based hemoglobin measurement during spinal anesthesia.
- Author:
Jin Hun CHUNG
1
;
Jae Young JI
;
Nan Seol KIM
;
Yong Han SEO
;
Hyung Youn GONG
;
Jae Woo KIM
;
Jong Bun KIM
;
Sie Hyeon YOO
Author Information
1. Department of Anesthesiology and Pain Medicine, Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan, Korea. doc0126@dreamwiz.com
- Publication Type:Original Article
- Keywords:
Hemoglobin;
Pulse co-oximetry;
Spinal anesthesia
- MeSH:
Adult;
Anesthesia, Spinal*;
Bupivacaine;
Catheters;
Humans;
Injections, Spinal;
Perfusion;
Radial Artery;
Spectrophotometry;
Toes
- From:Anesthesia and Pain Medicine
2014;9(4):277-281
- CountryRepublic of Korea
- Language:English
-
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.
