[Effect of electric acupoint stimulation on shivering in cesarean section].
OBJECTIVE
To explore the efficacy of electric acupoint stimulation on shivering in cesarean section.


METHODS
Eighty cases of parturients, under the America Society of Anesthesiologists (ASA) physical status II , were randomized into a transcutaneous electrical acupoint stimulation (TEAS) assisted anesthesia group (group A) and an anesthesia group (group B). Spinal-epidural anesthesia(CSEA) puncture was applied to both groups and 8 mg of 0. 75% bubivacaine was given by spinal injection, the block level was T4 T8. In group A, TEAS was applied before CSEA at paired acupoints-ipsilateral Hegu (LI 4)-Laogong (PC 8) and Sanyinjiao (SP 6)-Zusanli (ST 36) till ending the surgery. The 4 pair of bilateral acupoints were fixed with self-adhesive electrodes and connected with Han's acupoint and nerve stimulator (HANS, LH402H), the frequency was 2 Hz/ 15 Hz, the intensity was 10- 30 mA and the form was densedisperse wave within the patients' tolarance. The heart rate (HR), mean arterial pressure (MAP), oxyhemoglobin saturation (SPO) and shivering degree were recorded before anesthesia (To), 1 min after anesthesia puncture (Ti), 1 min after the delivery (Tz), during abdomen closure (T3) and at the end of surgery (T4).


RESULTS
The occurrence rate of shivering was 35. 0% (14/40) in group A, which was lower to 67. 5% (27/40, P<0. 05) in group B; the degree of shivering was lighter in group A than that in group B at T2, T3 and T4 (all P<0. 01). In group A, HR was faster at T1 and T2 compared to that at To (all P<0. 05), while at T3 and T4, the HR was the same with that before anesthesia (all P>0. 05). In group B, the HR was faster at T1, T2, T3 and T4 compared to that at T0 (P<0. 05, P<0. 01). In both groups, the MAP was lower at T1, T2 (P<0.05,P<0.01) and resumed to that before anesthesia at T3 and T4 (all P>0.05); there was no statistical significance of SPO2 in both groups (all P>0.05).


CONCLUSIONS
TEAS can reduce the occurrence rate of shivering and steady the heart rate in cesarean section.
Department of Anesthesia Second Peoples Hospital Affiliated to Fujian University of TCM Fuzhou 350003 China. yangdhe@sohu.com
Dai-He
DH
Yang
Department of Anesthesia Second Peoples Hospital Affiliated to Fujian University of TCM Fuzhou 350003 China.
Yu-Ling
YL
Zhu
Department of Anesthesia Second Peoples Hospital Affiliated to Fujian University of TCM Fuzhou 350003 China.
Wen
W
Huang
Department of Anesthesia Second Peoples Hospital Affiliated to Fujian University of TCM Fuzhou 350003 China.
Lin-Feng
LF
Tang
Department of Anesthesia Second Peoples Hospital Affiliated to Fujian University of TCM Fuzhou 350003 China.
Yi-Hua
YH
Sun
D015667:Acupuncture Analgesia; D015669:Acupuncture Points; D000328:Adult; D000773:Anesthesia, Obstetrical / Q000009:adverse effects*; D002585:Cesarean Section; D005260:Female; D006801:Humans; D011247:Pregnancy; D012768:Shivering; D004561:Transcutaneous Electric Nerve Stimulation; D055815:Young Adult