The Index For Monitoring Pain Based On The Nera Infrared

At present, pain has become the body temperature, pulse, respiration, blood pressure after the fifth signs of life. Pain is a complicated and subjective feeling, which is one of the most common clinical symptoms. It is also a very important medical problem in recent years. Research shows the incidence of pain has reached 45%, And the incidence rate of the elderly is as high as 65%.The appropriateness and popularity of pain treatment are often discussed in clinical practice, the conventional method is to use the subjective pain rating scale PA, lack of an objective evaluation of the degree of pain. In recent years, many researchers have conducted extensive studies on the relationship between volume pulse waves and pain levels. Volume pulse wave signal is a continuous periodic signal. The signal cycle is determined by the heart beat. We through the analysis of the volume pulse wave and the relationship between the changes of the waveform and the degree of pain. But the researchers mainly studied the relationship between the amplitude of the pulse waveform and the degree of pain, from the point of view of the research process, the stability of the pulse wave amplitude is not good, easy to be affected by the external conditions, Therefore, in this paper, we mainly study the morphological characteristics of the pulse wave, and study the relationship between the morphological changes of the volume waveform and the degree of pain.First, the specific morphological parameters of the volume pulse waveform are introduced, the descending branch area ratio of the pulse waveDAR and the full cycle area ratioTAR. Including the subjective pain score of patients with pain scale P A with the descending branch area ratioDAR and the full cycle area ratioTAR were analyzed by multiple linear regression analysis, during the analysis, the degree of pain monitoring index was named PMI.The research purpose of this thesis is basis 870 nm wavelength of near infrared spectroscopy and human tissue interaction characteristics, design and produce a set of 870 nm near infrared LED as the light source of the optical capacitor integrated pulse wave acquisition system.Secondly, we design of the volume of the pulse waveform acquisition syste m for clinical testing. And the test results show that the volume pulse wavefor m acquisition system can meet the experimental requirements, that achieve the flow of the frame、the volume of blood flow and other locations of the pulse wavefor m signal weak signal acquisition.In this paper, the development of the near infrared optical capacitance integrated pulse wave acquisition system for the random selection of ten patients with trigeminal pain patients for the acquisition of photoelectric volume waveform. According to the data collected, Drawing by drawing software, finally got the degree of pain monitoring index PMI pain in patients with pain before and after the change curve. Can be seen through the curve changes, with the patient’s physical therapy, the patient’s pain reduction, the degree of pain monitoring index PMI also decreased, it is showed that this instrument can basically meet the clinical requirements.