scholarly journals P21.03: New stage of fetal circulatory collapse by umbilical venous flow volume after thoraco-amniotic shunting

2014 ◽  
Vol 44 (S1) ◽  
pp. 310-310
Author(s):  
Y. Takahashi ◽  
S. Iwagaki ◽  
R. Chiaki ◽  
K. Asai ◽  
M. Matsui ◽  
...  
Keyword(s):  
Flow Volume ◽  
Circulatory Collapse ◽  
Venous Flow

Queckenstedt’s Test Headache Response is Associated with Increased Jugular Venous Flow Volume During Migraine Attack

2011 ◽  
Vol 37 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Chi-Hsiang Chou ◽  
Jong-Ling Fuh ◽  
Shuu-Jiun Wang ◽  
Han-Hwa Hu ◽  
Jaw-Ching Wu ◽  
...  
Keyword(s):  
Migraine Attack ◽  
Flow Volume ◽  
Venous Flow ◽  
Queckenstedt's Test

scholarly journals Indication of BOLD-Specific Venous Flow-Volume Changes from Precisely Controlled Hyperoxic vs. Hypercapnic Calibration

2011 ◽  
Vol 32 (4) ◽  
pp. 709-719 ◽  
Author(s):  
Clarisse I Mark ◽  
G Bruce Pike
Keyword(s):  
Cerebral Blood Volume ◽  
Blood Oxygenation ◽  
Flow Volume ◽  
Volume Changes ◽  
Venous Flow ◽  
Precise Control ◽  
Volume Relationship ◽  
Oxygenation Level ◽  
Rate Of Oxygen Consumption ◽  
End Tidal

Deriving cerebral metabolic rate of oxygen consumption (CMRO2) from blood oxygenation level-dependent (BOLD) signals involves a flow-volume parameter (α), reflecting total cerebral blood volume changes, and a calibration constant ( M). Traditionally, the former is assumed a fixed value and the latter is measured under alterations in fixed inspired fractional concentrations of carbon dioxide. We recently reported on reductions in M-variability via precise control of end-tidal pressures of both hypercapnic (HC) and hyperoxic (HO) gases. In light of these findings, our aim was to apply the improved calibration alternatives to neuronal activation, making use of their distinct vasoactive natures to evaluate the α-value. Nine healthy volunteers were imaged at 3 T while simultaneously measuring BOLD and arterial spin-labeling signals during controlled, graded, HC, and HO, followed by visual (VC) and sensorimotor cortices (SMC) activation. On the basis of low M- and CMRO2-variability, the comparison of these calibration alternatives accurately highlighted a reduced venous flow—volume relationship (α = 0.16 ± 0.02, with αVC = 0.12 ± 0.04, and αSMC = 0.20 ± 0.02), as appropriate for BOLD modeling.

Manual lymphatic drainage in chronic venous disease: A duplex ultrasound study

2013 ◽  
Vol 29 (10) ◽  
pp. 667-676 ◽  
Author(s):  
Rute Sofia dos Santos Crisóstomo ◽  
Miguel Sandu Candeias ◽  
Ana Margarida Martins Ribeiro ◽  
Catarina da Luz Belo Martins ◽  
Paulo AS Armada-da-Silva
Keyword(s):  
Blood Flow ◽  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Femoral Vein ◽  
Lymphatic Drainage ◽  
Chronic Venous Disease ◽  
Venous Disease ◽  
Flow Volume ◽  
Manual Lymphatic Drainage ◽  
Venous Flow

Objectives To compare the effect of call-up and reabsorption maneuvers of manual lymphatic drainage on blood flow in femoral vein and great saphenous vein in patients with chronic venous disease and healthy controls. Methods Forty-one subjects participated in this study (mean age: 42.68(15.23)), 23 with chronic venous disease (chronic venous disease group) with clinical classification C1–5 of clinical-etiological-anatomical-pathological (CEAP) and 18 healthy subjects (control group). Call-up and reabsorption maneuvers were randomly applied in the medial aspect of the thigh. The cross-sectional areas, as well as the peak and the mean blood flow velocity at femoral vein and great saphenous vein, were assessed by Duplex ultrasound at the baseline and during maneuvers. The venous flow volume changes were calculated. Results The venous flow volume in femoral vein and great saphenous vein increased during both manual lymphatic drainage maneuvers and in both groups ( P < 0.05). The two maneuvers had a similar effect on femoral vein and great saphenous vein hemodynamics, and in both the chronic venous disease and control groups. As a result of the call-up maneuver, the flow volume augmentations, as a result of call-up maneuver, decreased with the severity of chronic venous disease in those patients measured by the clinical classification of CEAP ( r = −0.64; P = 0.03). Conclusions Manual lymphatic drainage increases the venous blood flow in the lower extremity with a magnitude that is independent from the specific maneuver employed or the presence of chronic venous disease. Therefore, manual lymphatic drainage may be an alternative strategy for the treatment and prevention of venous stasis complications in chronic venous disease.

The Estimation of Segmental Hepatic Venous Flow in Man

1964 ◽  
Vol 46 (5) ◽  
pp. 525-530 ◽  
Author(s):  
Roger Williams ◽  
D.S. Zimmon ◽  
Eileen Thompson ◽  
Sheila Sherlock
Keyword(s):  
Venous Flow ◽  
Hepatic Venous Flow

A phase-contrast MRI study of physiologic cerebral venous flow

2009 ◽  
Author(s):  
Souraya Stoquart-ElSankari ◽  
Pierre Lehmann ◽  
Agnès Villette ◽  
Marek Czosnyka ◽  
Marc-Etienne Meyer ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Contrast Mri ◽  
Venous Flow ◽  
Mri Study

Analysis of Maximum Expiratory Flow Volume Curves Using Canonical Correlation Analysis

1985 ◽  
Vol 24 (02) ◽  
pp. 91-100 ◽  
Author(s):  
W. van Pelt ◽  
Ph. H. Quanjer ◽  
M. E. Wise ◽  
E. van der Burg ◽  
R. van der Lende
Keyword(s):  
Correlation Analysis ◽  
Canonical Correlation Analysis ◽  
Canonical Correlation ◽  
Flow Volume ◽  
Non Linear ◽  
Maximum Expiratory Flow ◽  
Expiratory Flow ◽  
Relationship Of ◽  
The Relationship ◽  
Age And Sex

SummaryAs part of a population study on chronic lung disease in the Netherlands, an investigation is made of the relationship of both age and sex with indices describing the maximum expiratory flow-volume (MEFV) curve. To determine the relationship, non-linear canonical correlation was used as realized in the computer program CANALS, a combination of ordinary canonical correlation analysis (CCA) and non-linear transformations of the variables. This method enhances the generality of the relationship to be found and has the advantage of showing the relative importance of categories or ranges within a variable with respect to that relationship. The above is exemplified by describing the relationship of age and sex with variables concerning respiratory symptoms and smoking habits. The analysis of age and sex with MEFV curve indices shows that non-linear canonical correlation analysis is an efficient tool in analysing size and shape of the MEFV curve and can be used to derive parameters concerning the whole curve.

Sign in / Sign up

Export Citation Format

Share Document