Background and Goal of Study: Recent work has showed that acupuncture on Yintang point may be as useful as body acupuncture and/or ear acupuncture using multiple acupoints. Our aim was to investigate the effect of ear press needle on this point for preoperative anxiety.
Materials and Methods: After approval of Ethics Committe of hospital, 52 patients undergoing surgery under general or regional anesthesia were divided in two groups in this prospective, randomised, sham-controlled, and single-blinded study:
- - Acupuncture group (Needling was performed on Yintang (EX HN-3) point which is located in the midpoint between two eyebrows at the root of the nose).
- - Sham acupuncture group (Needling applied 2 cm lateral to lateral end of the right eyebrow).
Patients undergoing surgery under local anesthesia were excluded. STAI (State Trait Anxiety Index) questionnaire and BIS (Bispectral Index) measurement was used for anxiety assessment. In the preoperative waiting area, a disposable BIS sensor which was attached to a BIS VIEW monitor (Aspect Medical Systems, Inc, Newton, MA, USA) was placed on each patient's forehead following a baseline STAI questionnaire was completed.
Then, patients received ear press needles (0.22 x 1.5 mm, KINGLI press needle, CHINA) at the verum or sham acupoints described above. BIS values were recorded on each 2-min intervals. After 20 minutes of study period, needles were removed and a STAI scale was completed again. Groups were compared for STAI changes and BIS values as well as demographic parameters.
Results and Discussion: There was no significant difference in the demographic data of the groups. BIS values in the acupuncture group were significantly lower than in the sham group in all time intervals (p< 0,0042).
BIS values were lower than baseline in the study group along the study period (p< 0,0004) while no such effect has been observed in the sham group (p>0,0004).Mean values of state anxiety (STAI-S) were decreased after acupuncture in the study group (p=0,018), while no change has been observed in trait anxiety (STAI-T) (p=0,156). However, patients of sham group showed no change in both parameters (p=0,387 ve p=0,116).
Conclusion(s): Acupuncture with ear press needles on Yintang point reduces preoperative anxiety in surgical patients.
This method with its effectiveness and simplicity offers an valuable choice to pharmacological agents in the management of preoperative anxiety.