Frequency of Electrical Acupoint Stimulation on Hypotension During Induction

The Influence of Electrical Acupoint Stimulation at Different Frequencies on Hemodynamics During Anesthesia Induction

Within 30 minutes before anesthesia, acupoint electrical stimulation at different frequencies were applied at Neiguan and Jian Shi. The changes in blood pressure during the anesthesia induction period were compared between the high-frequency group and the low-frequency group.

Inclusion Criteria:

• aged over 65 yrs old
• scheduled for surgery under general anesthesia

Exclusion Criteria:

• American society of anesthesiologists status over 3
• severe cardiac or respiratory dysfunction
• severe cardiac arrhythmia
• uncontrolled diabetes
• systolic arterial pressure over 180 mmHg