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Wrist Pulse Study

Wrist Pulse Study. Professor Allen T. Chwang Sir Robert Ho Tung Chair The University of Hong Kong. No. 1. Source: World Health Statistics. Traditional Chinese Medicine. A healthy body is maintained by the interaction between Yin and Yang the balance of the five elements:- Gold, Wood,

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Wrist Pulse Study

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  1. Wrist Pulse Study Professor Allen T. Chwang Sir Robert Ho Tung Chair The University of Hong Kong

  2. No. 1 Source: World Health Statistics

  3. Traditional Chinese Medicine • A healthy body is maintained by • the interaction between Yin and Yang • the balance of the five elements:- • Gold, • Wood, • Water, • Fire, • Earth • The theories of pulse diagnosis are holistic and experience based • The fingers of physicians are the pulse sensors

  4. The Three Common Positionsfor Chinese Pulse Diagnosis Cun Guan Chi

  5. The Twenty-seven Pulse-states • Floating • Hollow • Scattered • Sinking • Hidden • Slow • Rapid • Flooding • Thin • Weak • Minute • Full • Empty • Slippery • Leisurely • Moving • Choppy • Wiry • Tight • Leather • Firm • Soft • Knotted • Intermittent • Hasty • Long • Short

  6. The Wrist-Pulse Sensing Device

  7. The Cun, Guan and Chi Wrist Pulses

  8. P-wave T-wave D-wave V A Typical Wrist Pulse Legend: P-wave : Percussion wave; T-wave : Tidal wave; V : Valley; D-wave : Diastolic wave;

  9. Aortic valve and pulmonary valve closure Aortic valve and pulmonary valve opening Systole

  10. Bicuspid valve and tricuspid valve opening Bicuspid valve and tricuspid valve closure Diastole

  11. Identification of Wrist Pulse Properties Wrist Pulse S-pattern

  12. Normal Group • 123 subjects (57 M & 66 F) are studied • All subjects are free of chest pain and have no history of cardiovascular disease, diabetes mellitus and excessive alcohol use • The Normal group is subdivided into N20-39, N40-49 and N50 groups

  13. Normal Group

  14. Normal Group

  15. Normal Group

  16. Normal Group • The elasticity of arteries tends to decrease with advancing age • The resistance of the peripheral arteries increases • The rate of wave reflection from the peripheral arteries increases and makes a rise in the arterial blood pressure at an earlier stage of a cardiac cycle • The wrist-pulse classifications quantitatively display an age-related trend of hemodynamic properties in healthy subjects

  17. Hypertension (HT) Group • 25 patients (10 M & 15 F aged 6110) with essential hypertension either treated or untreated are studied • Mean systolic blood pressure 162  20 mmHg • Mean diastolic blood pressure 83  12 mmHg • Normal ECG • No history of cardiovascular disease • Age and heart rate matched with the N50 group

  18. Hypertension (HT) Group

  19. Hypertension (HT) Group • Hypertension causes changes in the arterial structures • Wave reflection rate increases greatly in hypertensive subjects, which causes a disproportionate increase in the arterial blood pressure during the cyclic ventricular ejection phase • The wrist-pulse analysis shows that the hypertensive subjects have a faster rate of wave reflection than the normotensive subjects

  20. Coronary Artery Disease Group • 60 patients (47 M & 13 F aged 64 9) with documented coronary artery disease are studied • The patients are subdivided into the CADHT and the CAD groups • Age matched with the N50 and the HT groups

  21. Coronary Artery Disease Group

  22. Coronary Artery Disease Group

  23. Coronary Artery Disease Group • The wrist pulses of both the CADHT and the CAD groups have steeper systolic slopes than those of the N50 and the HT groups • Coronary artery disease would alter the whole cycle of hemodynamic properties

  24. The Innovation and Technology Fund • Funding: HKD 3,276,000 • Duration: April 1, 2002 – March 31, 2004 • Objectives: • To design and construct a non-invasive wrist-pulse sensor • To establish a relationship between wrist pulses and cardiovascular conditions Team members: Dr. Elizabeth OY Lau; Prof. CP Lau; Dr. HW Chan; Dr. HF Tse

  25. Thank you

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