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Experimental Research about the Relation between Transesophageal Photoelectric Pulse Wave of Descending Aorta and Blood Pressure

Author: ZhangYiNan
Tutor: ZhuZhaoQiong
School: Zunyi Medical College,
Course: Anesthesiology
Keywords: Transesophageal Photoelectric pulse wave Characteristic parameters Arterial pressure
CLC: R544.1
Type: Master's thesis
Year: 2010
Downloads: 20
Quote: 0
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Abstract

The purpose of the study by the canine esophageal probe the feasibility of the descending aorta photoelectric pulse signal; correlation invasive blood pressure; extraction of characteristic parameters of pulse wave analysis parameters and synchronization femoral artery, and the resulting signal projection method of arterial blood pressure and assess its accuracy . Method 1, 10 adult canine thoracotomy incision the esophagus under direct vision reflective photoelectric sensor is placed in the esophageal, the light source emission point of the descending aorta, detect here the photoelectric pulse wave signal; incision right femoral arteries, arterial catheter insertion and monitoring of arterial blood pressure; connected four-channel physiological recorder to record and save the photoelectric pulse wave signal and synchronous femoral artery invasive blood pressure signal. 2, randomly selected 40 of the pulse wave of the descending aorta, is extracted from each of the waveform 8 characteristic parameters H, H, h / H, g / H, At, s, 1 H (1 TS / TD), k, applied to gradually regression analysis of the descending aorta characteristic parameters of the pulse wave with invasive blood pressure values ??of correlation, filtering, and femoral artery IBP good correlation characteristic parameters; 3, the characteristic parameters of the filtered introduced into the regression equation, the establishment systolic diastolic blood pressure, average pressure optimal equation;, from the point in time selected pulse wave outside randomly extracted 40 pulse waveform the characterized parameters into the regression equation, calculating the blood pressure values; and synchronization invasive blood pressure x ± s, calculating both the difference verify its accuracy; simple regression analysis to calculate the correlation coefficient, aortic blood pressure research transesophageal drop synchronization femoral artery invasive blood pressure correlation. 1, all canines can be obtained by esophageal descending aortic pulse wave, smooth waveform accounted for 93.56 percent of the total collection (42100/45000), stop breathing be stable pulse waveform, pulse wave with breathing wavy downs . 2, each smooth waveform can be extracted eight characteristic parameters with systolic blood pressure, a good correlation with the characteristic parameters of K (the introduction of greater than 90%), and h / H (introduction ratio of 80%); with diastolic good correlation characteristic parameter k (introduction ratio 90%), H (introduction ratio was 80%), S (introduction of more than 70%); with an average pressure of a good correlation with the characteristic parameters K and H (introduction ratio are 90% ); descending aortic pulse wave screening parameters and the femoral artery systolic pressure multiple correlation coefficient mean 0.871 (r = 0.749-0.935), the multiple correlation coefficient of the mean and the femoral artery diastolic pressure is 0.900 (r = 0.848-0.943 0.856), femoral artery mean pressure multiple correlation coefficient of the mean (r = 0.7314-0.921); the characteristic parameters and synchronization invasive blood pressure values ??have good correlation. 3, after the screening characteristic parameters introduced into the regression equation, each the canine can build systolic blood pressure, diastolic blood pressure, mean pressure optimal equation; 4, descending aortic blood pressure calculated femoral artery invasive blood pressure value difference x ± s smaller, systolic blood pressure difference between the maximum deviation of 1.026 ± 0.573mmHg, diastolic blood pressure difference between the maximum deviation of ± 0.911 0.605mmHg the mean pressure maximum deviation of ± 0.913 0.747mmHg; Both systolic blood pressure, diastolic blood pressure The correlation coefficient and mean pressure Mean 0.860 (r = 0.780-0.924) 0.832 (0.750-0.896) 0.842 (r = 0.790-0.886), the same trend. Conclusion 1, the use of reflective photoelectric sensor transesophageal probe descending aortic pulse wave signal, removing respiratory interference to obtain a smooth waveform; different descending aortic pulse wave characteristic parameters and systolic, diastolic and mean pressure with a specific ; can make use of the photoelectric pulse wave characteristic parameters to establish the descending aorta systolic blood pressure, diastolic blood pressure and mean pressure optimal equation, and real-time calculation of the blood pressure values ??of the different time points; 4 in hemodynamically stable condition under transesophageal descending aortic blood pressure synchronous femoral artery invasive blood pressure is good, change is basically the same.

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CLC: > Medicine, health > Internal Medicine > Heart, blood vessels ( circulatory ) disease > Abnormal blood pressure > Hypertension
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