View clinical trials related to Radial Artery.
Filter by:Pregnancy is a very complex and coordinated physiological process.The physiological changes are closely related to the physiological function of Zang-fu organs, which leads to the change of slippery pulse. By touching different levels of depth and the part of the radial artery, it is found that the formation mechanism of pulse information, especially unsmooth pulse, is similar to the principle of sonar emission and reception: the heart is equivalent to the transmitting device of sonar wave. Each contraction of the heart produces a cluster of powerful sound waves, which are rapidly transmitted to the whole body along the arterial wall and the blood in it as a medium. More than 90% of the arterial blood flow of normal organs and tissues is a steady laminar flow, which does not produce turbulence, so there is abnormal vibration when a certain organ and tissue has pathological changes. The arterial blood flow is squeezed and deformed which causing turbulence and abnormal vibrations, which are fused with a larger cluster of sound waves transmitted by the heart and then transmitted to the whole body. The investigators can feel this kind of sound waves which combine abnormal vibration waves by touching different levels of arteries close to the body surface, including the radial artery. At the same time, Professor Lucheng Song's team has conducted in-depth research on the characteristic unsmooth pulse of stable coronary heart disease, liver cirrhosis, gastritis and other diseases.During pregnancy, due to the significant increase in blood flow and maternal changes , the shape of sound waves transmitted to the radial artery in the artery will be changed. Professor Lucheng Song found in clinical practice that the pregnant pulse will have different sensations of smoothness and penetration in different parts of the finger, by touching different levels of depth and the part of the radial artery. It was found that the pulse condition of normal pregnant women in the middle and third trimester of pregnancy was different from that of normal non-pregnant women in different level and part of radial artery.This study will verify the efficacy of pulse diagnosis of traditional Chinese medicine in the diagnosis of pregnancy and lay a foundation for the diagnosis of abnormal pregnancy.
The purpose of this study is to use the " Pulse Detection System of Sound Waves " to collect the pulse information of recruited subjects, and to extract characteristic pulse information by multi-scale entropy, Fourier transform, Hilbert yellow transform, spectrum analysis, wavelet analysis and other methods. Evaluate the specificity, sensitivity, positive likelihood ratio and negative likelihood ratio of the "Pulse Detection System of Sound Waves" in the diagnosis of lumbar disc herniation.
Pulse diagnosis is an important method to judge the status of patients in the process of diagnosis and treatment of traditional Chinese medicine. At present, the commonly used site of pulse diagnosis is the radial artery, which is divided into "cun""guan" and "chi".During menstruation, the secretion of estrogen and progesterone drops to the lowest level. On the 7th day of menstruation in the proliferative period, the secretion of estrogen increases rapidly and rises to the first peak before ovulation. In the mid-secretory period, the secretion of estrogen rises to another peak, and the secretion of progesterone also reaches the highest peak. The state of the endometrium during non-menstrual period can be significantly different from the state of exfoliation and necrosis during menstruation. There are obvious differences in hormone levels and endometrial state and thickness in menstrual period and secretory period, especially in the middle and late secretion period, which affects the blood laminar flow of the uterine wall and is reflected in the acoustic information of the radial artery. Therefore, exploring the pulse manifestation of physiological menstruation can be expected to lay the foundation for assisting the diagnosis of pathological menstruation and endometrial diseases. Our team found that there are low-frequency sound waves in the radial artery, which carry the physiological and pathological information of the organs in the body, and developed a "Pulse Detection System of Sound Waves ". Previous projects have explored the abnormal sound waves of radial artery in patients with sequelae of cerebral infarction, stable coronary heart disease, chronic gastritis, neck-shoulder syndrome, liver cirrhosis and other diseases and achieved certain results. Therefore, in this study, the "Pulse Detection System of Sound Waves " will be used to collect the sound waves in the radial artery of 62 healthy female college students during menstruation and non-menstrual period within the same menstrual cycle , and researchers will carry on the frequency spectrum analysis and wavelet analysis to extract the pulse features. A diagnostic test was carried out by researchers to calculate the sensitivity and specificity of the "Sonic Pulse Detection System" in menstrual diagnosis. This study will verify the efficacy of pulse diagnosis of traditional Chinese medicine in the diagnosis of menstruation and lay a foundation for the diagnosis of pathological menstruation and endometrial diseases .
Pulse diagnosis is one of the traditional diagnostic methods of traditional Chinese medicine, which is of great significance in the process of disease diagnosis.Pulse diagnosis is the diagnosis of disease by touching the pulse of the radial artery at the wrist. Different diseases reflect different pulse characteristics.What we've found in long-term clinical observation is that patients with benign prostatic hyperplasia have something different in their pulse,the abnormal pulse we called "astringent pulse".There is no modern physiologic and pathological description on the occurrence of "astringent pulse" in traditional pulse science, so we study it from acoustics perspective.Our team thinks that every beat of the heart produces a vibration, which produces sound waves，the sound waves travel through the blood and eventually reflect off the arterial walls.When an organ(such as the prostate)，develops hyperplasia, local blood flow changes,the flow of blood, which should be laminar, changes and becomes turbulent，the conduction of sound waves in turbulence is disordered，so we end up with pulse features that are different from normal people that are reflected on the arterial wall. We have previously studied the pulse characteristics of chronic gastritis, coronary heart disease, cirrhosis and some other diseases，different pulse sounds were collected and analyzed using an independently developed Acoustic Pulse Detection System，the ideal results have been obtained.We found that most of the abnormal sound waves were between 20Hz and 500Hz, so we classified this sound wave as low frequency and audible sound wave.Based on the above analysis, this study will use the acoustic pulse detection system to collect the pulse images of patients with benign prostatic hyperplasia(BPH).We expected to collect the pulse waves of 62 patients and 62 relatively healthy people without BPH, and use Fourier transform, wavelet analysis and other analysis methods to study the characteristics of the collected sound waves, and observe the pulse characteristics of BPH disease.Then diagnostic tests were carried out to calculate the sensitivity and specificity of the acoustic pulse detection system in the diagnosis of BPH. This experiment will further verify the effectiveness of pulse diagnosis of diseases, and finally lay a foundation for the development of pulse diagnostic instrument can diagnose a variety of diseases.
Pulse diagnosis is an important method to judge the status of patients in the process of diagnosis and treatment of traditional Chinese medicine. At present, the commonly used site of pulse diagnosis is the radial artery, which is divided into "cun""guan""chi". Whether the diagnosis of pregnancy can be diagnosed by pulse diagnosis has been perplexing clinicians. In long-term clinical practice, it is found that slippery pulse often occurs in the radial artery of pregnant women. Before the 13th week of pregnancy, it is called early pregnancy. During pregnancy, chorionic gonadotropin gradually increases, progesterone increases, humoral metabolism changes, blood volume increases, hemodilution and cardiac output increase. Other studies have shown that due to the effect of estrogen, the number of active levels of renin in plasma increase several times, and will increase with the progression of pregnancy. This series of changes in pregnant women may be reflected in the pulse. During the clinical pulse examination, our team has found that some pregnant women had no abnormality in pre-pregnancy examination such as B-ultrasound, and abnormal unsmooth pulse in the ulna could be felt during pulse examination. Through follow-up, it is found that this kind of pregnant women may have miscarriage or stillbirth. Our team found that there are low-frequency sound waves in the radial artery, which carry the physiological and pathological information of the organs in the body, and developed a "Pulse Detection System of Sound Waves". Previous projects have explored the abnormal sound waves of radial artery in patients with sequelae of cerebral infarction, stable coronary heart disease, chronic gastritis, neck-shoulder syndrome, liver cirrhosis and other diseases and achieved certain results. Therefore, in this study, the "Pulse Detection System of Sound Waves" will be used to collect the sound waves in the radial artery of 76 healthy early pregnant women and 76 relatively healthy non-pregnant women. Fourier transform, wavelet analysis, Hilbert yellow transform and other methods will be used to identify the different characteristics of the pulse acoustic signals, and observe the time-frequency domain characteristics of the trial group and the control group.And researchers will carry on the diagnostic test, calculate the sensitivity and specificity of the "Pulse Detection System of Sound Waves" in the diagnosis of pregnancy. This study will verify the efficacy of pulse diagnosis of traditional Chinese medicine in the diagnosis of pregnancy and lay a foundation for the diagnosis of abnormal pregnancy.
Allotransplants of vascularized composite tissues are subject to chronic vascular rejection, which can lead to graft loss. Currently, no imaging technique allows a reproducible quantitative exploration of the arterial trees of the hand, and therefore a satisfactory monitoring of transplants. Since 2014, flow MRI has been applied to the analysis of small-calibre arteries by the Image Processing Team at the Amiens-Picardie University Hospital. Between 2015 and 2017, several acquisitions were made in 3 patients who received facial allotransplantation, and the team recently developed a flow MRI protocol dedicated to the study of arterial trees in the hand. The main objective is to measure vascular flows of radial, ulnar and interdigital arterial trees in normal (healthy volunteers) and pathological situations (patients with radial forearm flap reconstruction and patients with hand allotransplantation) using the specifically developed flow MRI protocol.
In this study, the investigators will investigate how patients' radial artery diameters change according to sex, age, height, weight and body mass index by measuring radial artery diameter using ultrasonography. The correlation of Allen test with doppler ultrasonography will also be evaluated.