Changes of heart rate variability during laparoscopic cholecystectomy
- VernacularTitle:腹腔镜胆囊切除手术心率变异性的变化
- Author:
Min LI
;
Jianyu JIANG
- Publication Type:Journal Article
- Keywords:
Heart rate variability(HRV) Laparoscopic cholecystectomy Pneumoperitoneum
- From:
Chinese Journal of Minimally Invasive Surgery
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objectives To study the effects of anesthesia, head-up position and CO 2 pneumoperitoneum on cardiac autonomic nerve evaluated by heart rate variability (HRV) during laparoscopic cholecystectomy. Methods 20 patients undergoing elective laparoscopic cholecystectomy were anesthetized with balanced anesthesia. Pneumoperitoneum was introduced by inflation of CO 2. Intra-abdominal pressure was maintained at (11～13) mmHg. HRV was measured in supine and head-up tilt (15?～20?) positions while the patients were awake, in the stable state of anesthesia and CO 2 pneumoperitoneum at 10 minute and 20 minute respectively. Power spectral analysis of HRV was conducted on 256-beat R-R interval segments of interpolated heart rate by using the fast Fourier transformation. Total spectral power (TP), low frequency power (LF) and high frequency power (HF) were calculated by integrating the power spectra between (0～0 5) Hz, (0 03～0 15)Hz and ( 0 15～0 35)Hz. Results The change of positions did not significantly influence HRV. Decreases in LF, HF and TP were noted during the maintenance of anesthesia. The power of LF, the normalized unit of LF and LF/HF ratio increased during inflation period. LF/HF increased from 2 15?1 16 to 4 61?2 04 ( q =4 491, P
