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Journal of Anesthesia

, Volume 32, Issue 6, pp 822–830 | Cite as

Impact of non-invasive continuous blood pressure monitoring on maternal hypotension during cesarean delivery: a randomized-controlled study

  • Takashi Juri
  • Koichi Suehiro
  • Aya Kimura
  • Akira Mukai
  • Katsuaki Tanaka
  • Tokuhiro Yamada
  • Takashi Mori
  • Kiyonobu Nishikawa
Original Article
  • 190 Downloads

Abstract

Purpose

This study aimed to investigate the efficacy of the ClearSight™ system (Edwards Lifesciences, Irvine, CA) for reducing the incidence of hypotension compared with the traditional oscillometric blood pressure monitoring in cesarean delivery under spinal anesthesia.

Methods

Forty patients undergoing cesarean delivery under spinal anesthesia were enrolled. The patients were randomly divided into two groups (Control and ClearSight groups). All patients received spinal anesthesia using 0.5% hyperbaric bupivacaine (11.5 mg) and fentanyl (10 µg). Blood pressure was managed with the same protocol using the ClearSight™ system (ClearSight group) and oscillometric blood pressure monitoring (Control group). Furthermore, we compared the accuracy of the ClearSight™ system with the traditional oscillometric monitoring for blood pressure measurement using Bland–Altman, four-quadrant plot, and polar plot analyses.

Results

The incidence of hypotension was significantly lower in the ClearSight group from induction to delivery (45% vs. 0%, p < 0.001) and to the end of surgery (50% vs. 20%, p = 0.049). Intraoperative nausea occurred more frequently in the Control group (45% vs. 10%, p = 0.012). The ClearSight™ system demonstrated acceptable accuracy with a bias of − 4.3 ± 11.7 mmHg throughout the procedure. Four-quadrant analysis revealed an excellent trending ability of the ClearSight™ system with a concordance rate of approximately 95%. In the polar plot analysis, the angular bias and concordance rate were − 13.5° ± 19.0° and 76.9%, respectively.

Conclusions

The accuracy and trending ability of the ClearSight™ system for blood pressure measurement was clinically acceptable in cesarean delivery under spinal anesthesia, leading to reductions in maternal hypotension and nausea.

Keywords

ClearSight™ Cesarean delivery Hypotension Spinal anesthesia 

Notes

Funding

Only departmental funds were used for this study.

Compliance with ethical standards

Conflict of interest

K. S. has received a speaker fee from Edwards LifeSciences in the 5th annual meeting of Japanese Society of Regional Anesthesia (held on 4/13/2018, Osaka, Japan).

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Copyright information

© Japanese Society of Anesthesiologists 2018

Authors and Affiliations

  1. 1.Department of AnesthesiologyOsaka City University Graduate School of MedicineOsakaJapan

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