Time-frequency blood flow parameters estimation for micro-emboli detection

2015 ◽  
Author(s):  
Blaise Kevin Guepie ◽  
Bruno Sciolla ◽  
Fabien Millioz ◽  
Romain Ramassamy ◽  
Emilie Pinatel ◽  
...  
Keyword(s):  
Blood Flow ◽  
Parameters Estimation ◽  
Time Frequency ◽  
Flow Parameters ◽  
Emboli Detection

Comparison of diagnostic accuracy of PET-derived myocardial blood flow parameters: A meta-analysis

2018 ◽  
Vol 27 (6) ◽  
pp. 1955-1966 ◽  
Author(s):  
Sang-Geon Cho ◽  
Soo Jin Lee ◽  
Myung Hwan Na ◽  
Yun Young Choi ◽  
Henry Hee-Seung Bom
Keyword(s):  
Blood Flow ◽  
Diagnostic Accuracy ◽  
Myocardial Blood Flow ◽  
Meta Analysis ◽  
Flow Parameters

scholarly journals Effects of the Airway Obstruction on the Skin Microcirculation in Patients with Bronchial Asthma

2016 ◽  
Vol 71 (3) ◽  
Author(s):  
Irina V. Tikhonova ◽  
N. I. Kosyakova ◽  
A. V. Tankanag ◽  
N. K. Chemeris
Keyword(s):  
Blood Flow ◽  
Airway Obstruction ◽  
Bronchial Asthma ◽  
Skin Blood Flow ◽  
Peripheral Blood ◽  
Atopic Asthma ◽  
Control Group ◽  
Bronchial Obstruction ◽  
Peripheral Blood Flow ◽  
Flow Parameters

Background: Pulmonary hemodynamic disorders depend on the inflammatory phases and severity of the obstructive syndrome. However, the effect of asthma bronchial obstruction on the state of peripheral hemodynamics remains insufficiently known. Aims: To study the effects of airway obstruction on skin blood flow parameters and its regulatory systems in patients with persistent atopic bronchial asthma in the remission state.Materials and methods: A comparative study of the skin peripheral blood flow in patients with bronchial asthma with severe airway obstruction (1st group) and without obstruction (2nd group) was conducted. 20 patients with confirmed diagnosis of atopic asthma of 50–74 years old participated in the study. All patients received basic therapy in a constant dosing of high doses of inhaled glucocorticosteroids/long-acting beta-2-agonists. The control group included 20 healthy volunteers without evidence of bronchial obstruction. The study lasted for 3 months. The forced expiratory volume in 1 s (FEV1) was used to evaluate the bronchial obstruction by spirometry technique. Skin blood perfusion changes were recorded by laser Doppler flowmetry at rest and in response to short-term local ischemia. Registered peripheral blood flow signals were examined using the amplitude temporal filtering in five frequency intervals to identify the functional features of the peripheral blood flow regulation systems. Results: Consistent two-fold decrease of the oscillation amplitudes was found in the neurogenic interval at rest (p=0.031), as well as in the myogenic (p=0.043; p=0.031) and endothelial intervals (p=0.037; p≤0.001) both at rest and during the postocclusive reactive hyperemia respectively in the 1st group of patients with bronchial obstruction (FEV1 80%) compared with the control group. No significant changes were revealed for skin blood flow parameters in the 2nd patient group (without obstruction, FEV1 80%) in comparison to control subjects.Conclusions: The presence of bronchial obstruction has a significant impact on the changes of the amplitudes of skin blood flow oscillations in patients with bronchial asthma in the myogenic, neurogenic and endothelial intervals.

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