Description LI4 (hegu) and PC6 (ximen)*, ST36 (zusanli) and SP9 (yinlingquan) and LR3 (taichong) and SP6 (sanyinjiao) – on the right side
Experimental Description
Forty-six healthy women, scheduled for laparoscopic sterilization at a Swedish county hospital, were randomized to have either the electro-acupuncture (n=23) or sham (n=23) procedure between the induction of general anaesthesia and the start of surgery.
Sample Count
46
Age
＞18
Control
Sham
sham(n=23)
Experiment
electro-acupuncture(n=23)
Indicator
MAC value of sevofluraneReactions to surgical incision in terms of neckLimb movementsPupil size (small/dilated)Orientation of eye axes (parallel/non-parallel)Heart rate(HR)Blood pressure(BP)
Auxiliary Medication
After induction of anaesthesia by facemask with 6-8% of sevoflurane in 6 lmin -1 of oxygen, EA(n=23) or sham (n=23) procedures were started according to a randomization list, in pairs of 10. Anaesthesia was maintained by facemask with sevoflurane in an oxygen-air mixture containing 30-40% of oxygen during the approximately 30-min study period.
Description Electro-acupuncture was given with an ACUS II stimulator (Cefar Medical AB, Lund, Sweden) using stainless steel 25-mm 25-G acupuncture needles (Carbo Trading Co. Inc, Scarborough, Ontario, Canada) introduced intramuscularly to a depth of 5–15mm. Square pulses with alternating polarity (frequency 2Hz, duration 180s, intensity 2.5 mA) were used
Anesthesia Method
AAA
Clinical Trial Type
random
Contraindications
Exclusion criteria were physical status III or IV accord_x005fing to the American Society of Anaesthesiologists,regular use of analgesics, body mass index greater than 35 kg/m-2 and language difficulties
Effector
The MAC for sevoflurane was found to be higher in the group given acupuncture than in the control group (2.1±0.3% vs. 1.8±0.4%;P=0.008). Electro-acupuncture given during general anaesthesia with sevoflurane failed to reduce but instead increased the clinical need for anaesthetic gas, possibly by reducing the anaesthetic effect of sevoflurane and/or by facilitating nociceptive transmission and/or reflex activity.
Acupuncture fails to reduce but increases anaesthetic gas required to prevent movement in response to surgical incision.
Abstract
BACKGROUND: Acupuncture is used for clinical pain relief but has not been evaluated under clinical anaesthesia. This study was designed to compare movement in response to surgical incision in anaesthetized patients subjected to electro-acupuncture (EA) or sham procedures. Our hypothesis was that EA stimulation would reduce the requirements for anaesthetic gas. METHODS: Forty-six healthy women, scheduled for laparoscopic sterilization at a Swedish county hospital, were randomized to have either the electro-acupuncture (n = 23) or sham (n = 23) procedure between the induction of general anaesthesia and the start of surgery. The minimal alveolar concentration (MAC) of sevoflurane required to prevent neck or major limb movements in response to surgical incision was determined in each group of patients. RESULTS: The MAC for sevoflurane was found to be higher in the group given acupuncture than in the control group (2.1 +/- 0.3% vs. 1.8 +/- 0.4%; P = 0.008). CONCLUSION: Electro-acupuncture given during general anaesthesia with sevoflurane failed to reduce but instead increased the clinical need for anaesthetic gas, possibly by reducing the anaesthetic effect of sevoflurane and/or by facilitating nociceptive transmission and/or reflex activity."
