A simple method for reconstruction of continuous brachial artery pressure from continuous digital artery pressure in humans

2017 ◽  
Author(s):  
Pandeng Zhang ◽  
Quanli Qiu ◽  
Ying Luo ◽  
Yanxia Zhou ◽  
Jia Liu
Keyword(s):  
Brachial Artery ◽  
Digital Artery ◽  
Simple Method ◽  
Artery Pressure

A Generalized Transfer Function Method for Reconstruction of Continuous Brachial Artery Pressure Based on Digital Measurement

2019 ◽  
Vol 9 (8) ◽  
pp. 1583-1589
Author(s):  
Pandeng Zhang ◽  
Ye Chen ◽  
Haibo Chen ◽  
Jia Liu
Keyword(s):  
Blood Pressure ◽  
Transfer Function ◽  
Brachial Artery ◽  
Delay Time ◽  
Cross Validation ◽  
Digital Measurement ◽  
Digital Artery ◽  
Artery Pressure ◽  
Tenfold Cross Validation ◽  
Generalized Transfer Function

Objective: To reconstruct brachial artery pressure (BAP) distally from digital artery pressure (DAP). Methods: We hypothesize that continuous BAP can simply be approximated by sum of two halves of the continuous DAP shifted by the delay time. In order to test it, we enrolled 30 healthy volunteers for two experiments. We firstly showed that the pressure wave in the digital artery can be considered twice as much as the forward/backward wave in the finger. A simplified individualized transfer function was then derived so as to estimate BAP from DAP with the parameter of delay time estimated by tenfold cross validation. Finally, by comparing with a reference BAP, we found that the proposed method can correct the DAP. Result: The errors of the proposed method in estimating systolic and diastolic pressures are 0.4 ± 6.2 and 0.7 ± 3.7 mmHg, respectively. These results agree with the standard of Association for the Advancement of Medical Instrumentation (AAMI). Discussion: In our method, large arteries are modeled with a uniform, frictionless tube, while small arteries are represented as a terminal load. The unknown parameter of the delay time are estimated by tenfold cross validation. Conclusion: Our method is therefore promising in estimating continuous proximal blood pressure from peripheral blood pressure in practice.

Ophthalmic/Brachial Artery Pressure Ratio in Man

1969 ◽  
Vol 67 (5) ◽  
pp. 684-688 ◽  
Author(s):  
A. Borrás ◽  
A. Martínez ◽  
M.S. Méndez
Keyword(s):  
Brachial Artery ◽  
Pressure Ratio ◽  
Artery Pressure

scholarly journals Relation of Pulsatility of Brachial Artery Pressure to Resistant Hypertension

2004 ◽  
Vol 27 (9) ◽  
pp. 641-646
Author(s):  
Yuji YOSHITOMI ◽  
Chieko NAGAKURA ◽  
Atsuyoshi MIYAUCHI
Keyword(s):  
Brachial Artery ◽  
Resistant Hypertension ◽  
Artery Pressure

Vascular effects of angiotensin and norepinephrine in the dog, cat, and monkey

1965 ◽  
Vol 208 (2) ◽  
pp. 260-264 ◽  
Author(s):  
Thomas E. Emerson ◽  
Lerner B. Hinshaw ◽  
Charles M. Brake
Keyword(s):  
Weight Loss ◽  
Brachial Artery ◽  
Constant Flow ◽  
Direct Effects ◽  
Weight Changes ◽  
Vascular Effects ◽  
Artery Pressure ◽  
Norepinephrine Infusion ◽  
Small Vein ◽  
Natural Flow

The direct effects of angiotensin and norepinephrine on forelimb vessels were compared in the dog, cat, and monkey in constant-flow forelimb preparations. Equiweight and equimolar injections and in some instances equiweight infusions were carried out. Brachial artery pressure (BAP), small vein pressure (SVP), and limb weight changes were continuously recorded. In some instances, intact, natural-flow preparations were employed. With equimolar injections in constant-flow limbs, angiotensin increased limb BAP and SVP more than norepinephrine in the dog and cat, and caused a significantly greater loss of limb weight in the dog. With equiweight doses, angiotensin caused a greater increase of cat forelimb BAP and SVP and monkey SVP; norepinephrine injection resulted in a greater increase of dog limb BAP and SVP and approximately the same increase of monkey BAP as angiotensin. Limb weight loss was not significantly different in any species. The initial SVP elevations produced by angiotensin and norepinephrine infusion were about equal, but the small veins became unresponsive to angiotensin after several minutes of infusion.

Acoustic Response of Arteries Using Thick Wall Tube Assumption

2009 ◽  
Author(s):  
A. M. Al-Jumaily ◽  
A. Salam Al-Ammri
Keyword(s):  
Brachial Artery ◽  
Diastolic Pressure ◽  
Cuff Pressure ◽  
Time Lag ◽  
Thick Wall ◽  
Thin Wall ◽  
Feature Points ◽  
Acoustic Response ◽  
Time Duration ◽  
Artery Pressure

This paper describes the pressure wave propagation and reflection phenomenon in the aorta and the brachial artery to reproduce the brachial artery pressure and the strain imposed on the cuff external wall using thick wall tube assumption for the aorta. The effects of variations in aortic radius, thickness, heart rate and cuff pressure on the brachial artery pressure contours and pneumatic cuff strain contours were investigated The thick wall tube assumption for the aorta will improve the accuracy of the results and give an indication about the error involved when using thin wall tube assumption. The results indicate that there are some differences between the trends and shapes of the curves when using thick wall assumption. This difference could be as high as 3% for the eight feature points extracted from the pressure and strain contours. These feature points are the time duration before the deflection marking the arrival of the incident and reflected wave, the peak of the first and second pressure deflection minus the diastolic pressure, the peak of the first and second strain deflection minus the strain at diastolic pressure. These features points are used to calculate the brachial augmentation indices and the time lag which are used as a measure of arterial stiffness.

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