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脉搏的测量方法大致有两种。一种方法是测量血管动态压力产生的压脉波,另一种是根据血液在肢体的常积变化引起的容积脉波。压脉方法用于颈动脉、上肢、下肢动脉等的测量,容积脉搏波是在手足的指端取得。采用手指测量法最为方便。血压变化引起手指部血量变化,可以采用光电式检测血液中血红蛋白量的变化来取得血液量的变化。血红蛋白质对波长为5000～8000A(1A=10~(-10)m)的光线吸收特别强,用这种波长的光去照射手指,只要测量手指对这种光量吸收的变化(采用光敏元件),就可以测得脉波的变化波形。
Pulse measurement methods are roughly two. One is to measure the pressure pulse generated by dynamic pressure in the blood vessel and the other is to measure the volume of the pulse wave caused by the change of the blood in the limb. The pulse-pressure method is used for the measurement of carotid, upper extremity, lower extremity arteries, etc. Volume pulse waves are obtained at the fingertips of the hand and foot. Finger measurement method is the most convenient. Blood pressure changes caused by finger blood volume changes, you can use photoelectric detection of blood hemoglobin changes in blood volume changes. Hemoglobin absorbs light of a wavelength of 5000-8000 A (1 A = 10 -10 m) particularly strongly, and irradiates the finger with light of this wavelength by measuring the change of the finger’s absorption of light (using a photosensitive element) , You can measure the pulse waveform changes.