Ultrasound at Zusanli in Hypertension

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Hi All,

 

SH Wang*, YT Chen, CS Weng, PH Tsui, JL Huang1 & KC Chiang2

(2004) A Clinical Therapeutic Assessment for the Administration of

Different Modes of Ultrasounds to Stimulate the Zusanli Acupuncture

Point of Hypertension Patients. Journal of Medical and Biological

Engineering, 23(4):221-228. Department of Biomedical Engineering,

Chung Yuan Christian University, Chung-Li, Taiwan, 320, ROC.

1Hospital of Traditional , Taipei, Taiwan, 108, ROC.

2Skylark Device & Systems Co, Ltd., Taipei, Taiwan, 104, ROC. A

clinical trial to assess the therapeutic effect of ultrasonic stimulations on

the AP point was carried out. Specifically, ultrasound frequencies of 1

and 3 MHz associated with different duty cycles of the tone burst wave

at different acoustic power were employed to stimulate the Zusanli AP

point of a subject’s right leg. The Ryodoraku values were measured

from the 12 primary meridians of both hands to monitor the change of

the meridian impedance following the stimulation. 67 healthy volunteers

and 60 hypertension patients were evaluated. These subjects were

given ultrasonic stimulations for 10 min. In addition to measurement of

the Ryodoraku value, physiological quantities including BP and pulse

rate were also recorded. After ultrasound at Zusanli, the Ryodoraku

values measured from both the hypertension patients and healthy

subjects were significantly decreased (p<0.01). The change of the

Ryodoraku value associated with stimulations using a 3 MHz is 8%

larger than that of a 1 MHz. The application of a 770 mW ultrasound has

an approximately 6% change larger than that of a 380 mW. Moreover,

ultrasonic stimulation of a 100% duty cycle developed a change circa

7% more than that of a 10% duty cycle. Systolic pressure, diastolic

pressure, and pulse of hypertension patients were obviously reduced

(p<0.05) after ultrasonic stimulation. The average decrease of these

physiological quantities was from 3-7%. This study verified the

therapeutic effect of ultrasonic stimulation at Zusanli, which could be

taken into account for further development of an ultrasonic AP system.

 

 

 

 

 

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