Articles on the Meridians and Bi-Digital O-Ring Test.

(1)Toshikatsu KITADE: Clinical Investigation of the Location of Meridians and Acupoints by Means of Bi-Digital O-Ring Test(I) A Study of the Heart Meridian. Abstracts of WFAS '95 Symposium on Acupuncture and Qi, Istanbul, TURKEY : 19,1995.11 手少陰心経
Summary:[Objective]Acupuncture and acupuncture anesthesia, which are based on the view that the human body has meridians and acupoints, have been shown to be clinically effective. It is, however, not possible to directly observe the meridians or acupoints. We recently attempted to map the heart meridian on the skin of subjects, using the Bi-Digital O-ring Test (BDORT), and to compare the thus-obtained image with the classical meridian chart.
[Methods] l. Subjects: The subjects were 7 healthy volunteers (5 males and 2 females). The age of the 5 males was 22, 23, 27, 43 and 52 years, respectively, and both females were 22 years old.
2.BDORT: The subjects form a ring with their first and fourth fingers, while holding a normal myocardial preparation in the palm of the other hand. The skin of the subject's arms is compressed slightly at various points by a rod made of insulating material. At the same time, the ring is pulled by the examiner, to determine whether the finger ring opens (a response which indicates that the compressed point is related to the myocardium) or does not open (a response which indicates that the compressed point is not related to the myocardium).
The border between myocardium-related and non-myocardium-related areas was marked on the skin. Some other preparations of the normal heart were also used in this test. 3. Acupoint stimulation:The location of the acupoint Shaohai was examined using the BDORT. Each subject received this test 6 times during the 18-day study period.
[Results] l. In all 5 of the subjects, 5 regular circles and thin lines connecting these circles could be depicted on the anterior ulnar surface of the upper limb. 2. In 4 cases, the location of the Shaohai moved within anarea of 8.9×17.6 ・ on average.
3. A line identical to the heart meridian was depicted on the right brachium when the subjects held a preparation of the pulmonary valve, tricuspid valve, right atrium and coronary artery. The same line was depicted on the right forearm when the subjects held a preparation of the coronary artery and right ventricle. These lines were partially interrupted.
[Discussion and Conclusion]The distribution of the meridian and acupoints obtained in the present study was similar to the heart meridian included in the classical meridian chart. The line depicted on the elbow, however, did not agree with the heart meridian included in the classical meridian chart. Of the 9 acupoints, from HT1 (Jiguan) to HT9 (Schaochong) , which were depicted as regular circles, only the terminal point had a diameter of 3 ・ and the other acupoints had a diameter of about 6 ・.
The area inside the circle showed no relationship to the myocardium (It resembled the frame of a pair of spectacles) . The line, whose course was the same as the known course of the heart meridian, appeared to correspond to the heart, and this line appeared to be composed of segments which correspond to different sites of the heart. The BDORT, which can be used to make an image of the invisible acupoints and meridians on the skin's surface, will contribute to clarifying meridians.
Keywords: acupuncture, Bi-Digital O-Ring Test, heart meridian


 (2)Toshikatsu KITADE:Clinical Investigation of the Location of Meridians and Acupoints by Means of Bi-Digital O-Ring Test(I):Heart Meridian in Normal Subjects and Patient Atients with Atrial Fibrillation. Abstracts of the 6th Congress of Japan on Bi-Digital O-Ring Test Medical Society, Sanjo Kaikan,Tokyo University :34-35,1996.8 健常者と心房細動患者の手少陰心経の経穴と経絡
Summary: [Purpose] We drew the heart meridian on the skin by the imaging method of the bi-digital o-ring test (developed by Dr.Y. OMURA) and compared it with the classical meridian.    [Methods] The subjects were 12 normal adults and a 50-year-old male with atrial fibrillation. The subjects held myocardial preparation (normal specimen) in their palm. While the skin of the upper limb was slightly pressed using an insulation stick, the fingers for the test were pulled. Sites at which the fingers open (sites associated with the myocardium) and those at which the fingers do not open (sites not associated with the myocardium) were examined, and their boundaries were drawn. Normal specimens associated with the heart were also used.
[Results] (1) Meridian: In all 12 normal subjects, 9 circles and lines connecting them (not the band pattern) were drawn on the lunar side on the anterior surface of the upper limb. The right upper limb was evaluated in 8 subjects (males aged 21, 23, or 52 years old; 4 females aged 22 years and 1 aged 23 years) and the left limb in 4 subjects (a male aged 44 years; 2 females aged 22 years and 1 aged 23 years) . In the patient, a branch meridian was observed on the ulnar side of Shaohai (HT3), and the meridian was slightly wider than that in the normal subjects .
(2) Acupoints: The center of the circles in accordance with the regional acupoints of the heart meridian could be expressed by imaging by the tissue shown in the table. Four males (right; male aged 43 years; left, males aged 27, 43, or 53 years) were evaluated. In the patient, the diameter was slightly longer than that in the normal subjects. Acupuncture at these acupoints had favorable effects on the associated organs. Acknowledgment: We express deep gratitude to Katsuji KUROKAWA and Masato NAKAYAMA for cooperation.
Keywords: acupuncture, Bi-Digital O-Ring Test, heart meridian, atrial fibrillation

related Preparation
Right side
Left side

HT1 極泉Jiquan

right ventricle(inside)
left ventricle(inside)
right atrium(outside)
right atrium(outside)

HT2 青霊Qingling


HT3 少海Shaohai

sinoatrial node

HT4 霊道Lingdao

mitral valve
interventricular septum

HT5 通里Tongli


HT6 陰郤Yinxi

Purkinje's fivers

HT7 神門Shenmen

tricuspid valve
mitral valve

HT8 少府Shaofu

HT9 少衝Shaochong

medulla oblongata


 (3)Toshikatsu KITADE : A Clinical Study of the Association of Tonic Sedating Acupoints with Organs, Using the Bi-Digital O-Ring Test. Abstracts of 3rd International Symposium on The Bi-Digital O-Ring Test, Waseda University ,Tokyo:121,1997.10 経絡を調節する補瀉穴
Summary:[Objective] According to the traditional theory of acupuncture, if some meridian becomes pathologic, that is, if it becomes 'deficient' or 'excessive', some acupoints along that meridian serve as tonic points and others along the same meridian serve as sedating points (Table ).  At this Third International Symposium on Bi-Digital O-Ring Test, I will present my recent clinical study, in which the association of these tonic and sedating points with various organs was analyzed, using the Bi-Digital O-Ring Test (BDORT).
[Methods] l. Subjects; Ten randomly selected patients (3 males and 7 females) were the subjects. In each subject, 24 acupoints, serving as tonic or sedating points, were tested in July or August 1997.
2.Procedure of BDORT; While the subjects held a specimen of a normal organ on their palm, the examiner compressed the skin above the acupoint, using an insulated bar, and pulled the finger to be tested. A map was made of those skin areas whose compression induced the test finger to open (areas showing the resonance phenomenon, i.e., areas associated with the specimen held) and areas whose compression did not induce the finger to open (areas not associated with the specimen held). This is called direct BDORT.
[Results and Discussion] 1.Compression of the perimeter of most acupoints resulted in positive responses when the subject held the specimen of the organ whose name is linked with the meridian to which the stimulated acupoint belongs. For example, compression of acupoints Taiyuan (L9) and Chihtse (L5), which belong to the lung meridian, yielded positive responses when the subject held a specimen of lung. However, acupoints along the pericardial meridian were found to be associated with the adrenal gland instead of the pericardium, acupoints along the triple heater meridian were associated with the thyroid, parathyroid, pancreas and gonad, and acupoints along the bladder meridian were associated with the peritoneum.
2.Positive responses to compression of the center of each acupoint were not related to holding one particular organ on the palm. That is, no particular correspondence was observed between positive responses to compression of the center of each acupoint and the organ specimen held in the hand. These results suggest that each acupoint is associated with two or more organs, rather than only one organ.
Keywords: Bi-Digital O-Ring Test, sedating point, tonic point, acupuncture, meridians

Meridians Points of Tonification Points of Sedation




Large Intestine












Small Intestine












Triple Energizer









(4)Toshikatsu KITADE, Katsuji KUROKAWA*Studies on the Localization of Meridian and Acupuncture Points Using the Bi-Digital O-Ring Test(・): A Study on the Large Intestine Meridian(1). Journal of International Society of Life Information Science(ISLIS), 18(1):242- 245, 2000.3 手陽明大腸経
*Kurokawa Acupuncture Clinic, Uni-buru-Shin-sakae 408, 1-26-10, Aoi, Higashi-ku, Nagoya 461-0004, JAPAN. Phone:+81-52-937-5222, E-mail:kuro-ka @ ja 2.so-net.ne. jp

To date, we have previously studied the Heart Meridian1)2)3). Now, we have traced the Large Intestine Meridian(LI) on the surface of the skin using the Bi-Digital O-Ring Test(BDORT) and compared our findings with meridian diagrams found in Chinese medical classics. In this test, the brain responds to minute bodily stimulus by affecting muscle tonus and this activity is evaluated through changes in muscle strength in the fingers.
[Method] 1) Test subject: healthy 53-year-old male
2) BDORT(Y.Omura,B.Sc.,M.D.,SC.D.;inventor): The testee was asked to hold a colon preparation (normal sample) in the palm of his hand. When the tester lightly pressed the skin of the testee's upper limb with an insulated stick,the tester was able to pull the testee's fingers (O-Ring)apart.
The meridian was traced along the borderline between those areas where the testee's O-Ring could be pulled apart (areas related to the colon), and those areas where the O- Ring could not (non-related areas).
[Results and Discussion] The Large Intestine Meridian described in the classics commonly begins from the 2nd finger (end point, Shangyang: LI1), runs along the radius of the forearm toward the center, up the outside of the upper arm, and comes to the first thoracic vertebra (Dazhui :GV14).
Descending from the supracla-vicular fossa, the Large Intestine Meridian connects with the "lungs" (in Traditional Chinese Medicine) and then descends down past the diaphragm to connect with the"large intestine"(in Traditional Chinese Medicine).
A branch of this meridian ascends up the neck, passes through the lower jaw and enters the lower teeth, where the right and left meridians curve around the sides of the mouth and intersect near the upper lips at Shuigou:GV26, finally coming to the outer flanks of the nose (Yingxiang: LI 20).
The results of the BDORT traced a path roughly the same as the exterior meridians (on the surface of the body) shown in the meridian diagrams. However, we were not able to trace the internal meridians(the energy"Qi"pathways connecting from the body surface inside to the various organs on the body).
Our decision to use the large intestine normal sample (colon preparation) was based on preliminary investigations. At the same time, this decision was influenced by records of classical literature and clinical knowledge. We were not able to trace the Large Intestine Meridian using samples other than the colon sample.
Although meridians and acupuncture points play an important part within the 3,000 year history of Chinese acupuncture medicine, we are presently still unable to see meridians or acupuncture points with the eye. Omura, using the BDORT which he invented, was able to show for the first time that the meridians and acupuncture points were responsive on the surface of the body. The activity of the BDORT seems to have something to do with the electromagnetic field resonance occurring between two identical substances. Again, Omura writes that when a substance placed in the palm emits the same kind of electromagnetic field as that which exists within the body and the palm picks this field up, a resonance effect occurs which, via the brain, weakens muscle strength.
Utilizing this activity,(following our investigation of the Heart Meridian), we were able to trace on the body's surface meridians and acupuncture points of a similar kind for the Large Intestine Meridian. Looking to the future, we need to increase the number of such case studies.
[Conclusion] Utilizing the BDORT to investigate the Large Intestine Meridian, we were able to trace roughly the same lines which are mrecorded within the classical texts of Chinese medicine on the surface of a subject's body.
Keywords: acupuncture meridian, large intestine meridian, Bi-Digital O-Ring Test, acupuncture point, acupuncture medicine, colon