Continuous measurement of heart rate variability following carbon dioxide pneumoperitoneum during nitrous oxide/sevoflurane anaesthesia

  • Syuhei Kurashige Asahi University
  • Ko Takakura Asahi University
  • Maki Mizogami Asahi University
Keywords: heart rate variability, positive pressure pneumoperitoneum

Abstract

Background: Previous studies of autonomic nervous system activity through analysis of heart rate variability (HRV) have demonstrated increased sympathetic activity during positive-pressure pneumoperitoneum. We employed an online, continuous method for rapid HRV analysis (MemCalc™, Tarawa, Suwa Trust, Tokyo, Japan) to demonstrate rapid changes in autonomic nervous system during pneumoperitoneum for laparoscopy. Method: The powers of low-frequency (LF) (0.04-0.15 Hz) and high-frequency (HF) (0.15-0.4 Hz) components of HRV in 20 healthy adult patients were monitored under sevoflurane anaesthesia for 10 minutes after the initiation of carbon dioxide pneumoperitoneum at 10 mmHg. Results: Heart rate increased promptly, but transiently, just after peritoneal insufflation. At that time, the ratio between the LF and HF components increased on HRV. Similar, but small, changes occurred following head-up positioning. Conclusion: By monitoring HRV continuously, we have demonstrated that the change in autonomic nervous system balance induced by peritoneal insufflation was prompt and transient. The change in autonomic nervous system activity could have been due to increased sympathetic activity, reduced vagal activity, or both.

Author Biographies

Syuhei Kurashige, Asahi University
DDS, PhD Department of Anaesthesiology School of Dentistry Asahi University Hozumi Mizuho Gifu Japan
Ko Takakura, Asahi University
MD, PhD Department of Anaesthesiology School of Dentistry Asahi University Hozumi Mizuho Gifu Japan
Maki Mizogami, Asahi University
MD, PhD Department of Anaesthesiology School of Dentistry Asahi University Hozumi Mizuho Gifu Japan
Published
2011-03-26
Section
Original Research