Anatomy of the Cun Position at Wrist and Its Application in Pulse Diagnosis

Abstract

Information on anatomy of the Cun position at wrist is lacking; whether the blood vessel taking pulse in Cun is the radial artery or the superficial palmar branch is also clinically controversial. The objective was to investigate the boundaries and contents, and the vascular distribution and their pulse points in Cun. Thirty-two upper extremities of 16 human cadavers were investigated for dissection and observation. The boundaries, contents, and blood vessel distribution in Cun were observed; the location of pulse points in Cun was identified; the length of the superficial palmar branch in wrist pulse (L1), the pulp width of the index finger (L2), and the angle between the radial artery and the superficial palmar branch were measured. The results showed that the Cun was located in the region formed by the bulge of the prominent bone proximal to the palm, the radial flexor tendon, the tubercle of scaphoid, and the abductor longus muscle tendon. In this area, the radial artery could be pulsed part in the medial side of the abductor longus muscle tendon, while the superficial palmar branch lied near the surface and was easy to pulse in the lateral side of the radial flexor tendon and the medial side of the tubercle of scaphoid. The ratio of L1 to L2 was 1.2±0.8, and the angle was 23.3±9.9°. The results suggested that it could not be generalized that the blood vessel taking pulse in Cun was the radial artery or the superficial palmar branch; it might depend on the vascular distribution in Cun, the region of finger positioning, and the patient’s pulse condition.

Preliminary Study of an Objective Evaluation Method for Pulse Diagnosis using Radial Artery Pulse Measurement Device

“…The pulse wave velocity was calculated at each peak time (Equation 1). The pulse wave velocity was calculated from the rst peak of the pulse wave recorded at each sensor according to Equation (1). Figure 11 shows a comparison of the pulse wave velocities between pre-test, during test, and post-test conditions of the calculation task, obtained from the pulse diagnosis device.…”

“…In modern medicine, pulse wave velocity is regarded as an important parameter representing arterial stiffness for quantitatively diagnosing the extent of arteriosclerosis [9][10][11][12][13][14][15]. In traditional pulse diagnosis, the degree of transmission of smooth pulse waves and rough pulse waves are determined [1,2]. In the proposed pulse diagnosis system, the three high-precision pressure sensors arranged in series on the radial artery allow physical measurement of pulse waves directly, and a matrixed acceleration pulse waveform can be obtained.…”

“…In the traditional Chinese diagnostic procedure called pulse diagnosis, the examiner places three ngers in contact with the radial artery on the left and right wrists [1,2]. Traditional Chinese medicine has been attracting at-tention in recent years as an inexpensive alternative and complement to modern medicine from the viewpoint of rising medical costs.…”

“…In this method, various diseases are diagnosed by palpating while changing the pressure of the ngers. The factors determining the pulse condition are the depth, width, length, frequency, rhythm, and strength [1,3,4]. By palpating the pulse, traditional Chinese medical doctors read the physical properties of blood vessels, heart rate variability, blood pressure reex, and pulse wave velocity.…”

WITHDRAWN: Assessment Parameters on Array Pulse Wave Analysis and Application in Hypertensive Disorders

“…Then the sensor array (PPS SN7798) were fixed in left-hand-side "guan" site of the wrist. [16] ( Figure 6) The real-time pulse waves of 30 seconds were carried out. Record the amplitude of three characteristic peaks and one valley in pulse waveform.…”