scholarly journals CO2 clearance by membrane lungs

Perfusion ◽  
2017 ◽  
Vol 33 (4) ◽  
pp. 249-253 ◽  
Author(s):  
Liqun Sun ◽  
Andreas Kaesler ◽  
Piyumindri Fernando ◽  
Alex J. Thompson ◽  
John M. Toomasian ◽  
...  
Keyword(s):  
Blood Flow ◽  
Surface Area ◽  
Oxygen Transfer ◽  
Venous Blood ◽  
Venous Blood Flow ◽  
Flow Ratio ◽  
Removal Capacity ◽  
Blood Flow Ratio ◽  
Specific Amount

Introduction: Commercial membrane lungs are designed to transfer a specific amount of oxygen per unit of venous blood flow. Membrane lungs are much more efficient at removing CO2 than adding oxygen, but the range of CO2 transfer is rarely reported. Methods: Commercial membrane lungs were studied with the goal of evaluating CO2 removal capacity. CO2 removal was measured in 4 commercial membrane lungs under standardized conditions. Conclusion: CO2 clearance can be greater than 4 times that of oxygen at a given blood flow when the gas to blood flow ratio is elevated to 4:1 or 8:1. The CO2 clearance was less dependent on surface area and configuration than oxygen transfer. Any ECMO system can be used for selective CO2 removal.

Norethynodrel with mestranol and venous blood flow

JAMA ◽  
1966 ◽  
Vol 198 (7) ◽  
pp. 784-785 ◽  
Author(s):  
A. Neistadt
Keyword(s):  
Blood Flow ◽  
Venous Blood ◽  
Venous Blood Flow

Effect of sitting in ergonomic chairs on lower limb venous blood flow

2009 ◽  
Vol 8 (2,3) ◽  
pp. 125-132 ◽  
Author(s):  
Erik Levin ◽  
Deborah Macintosh ◽  
Tanya Baker ◽  
Mark Weatherall ◽  
Richard Beasley
Keyword(s):  
Blood Flow ◽  
Lower Limb ◽  
Venous Blood ◽  
Venous Blood Flow

Venous blood flow measurement by determination of change in venous hemoglobin saturation

2000 ◽  
Vol 28 (9) ◽  
pp. 3181-3184 ◽  
Author(s):  
Yasuhiro Umemoto ◽  
Shinichi Nishi ◽  
Mituo Shindoh ◽  
Akira Asada
Keyword(s):  
Blood Flow ◽  
Flow Measurement ◽  
Venous Blood ◽  
Venous Blood Flow ◽  
Blood Flow Measurement ◽  
Hemoglobin Saturation

scholarly journals Kinetic scheme for arterial and venous blood flow, and application to partial hepatectomy modeling

2017 ◽  
Vol 314 ◽  
pp. 102-125 ◽  
Author(s):  
Chloe Audebert ◽  
Petru Bucur ◽  
Mohamed Bekheit ◽  
Eric Vibert ◽  
Irene E. Vignon-Clementel ◽  
...  
Keyword(s):  
Blood Flow ◽  
Partial Hepatectomy ◽  
Venous Blood ◽  
Kinetic Scheme ◽  
Venous Blood Flow

scholarly journals Changes in lower extremity blood flow during advancing phases of pregnancy and the effects of special footwear

2017 ◽  
Vol 16 (3) ◽  
pp. 214-219 ◽  
Author(s):  
Marta Gimunová ◽  
Martin Zvonař ◽  
Kateřina Kolářová ◽  
Zdeněk Janík ◽  
Ondřej Mikeska ◽  
...  
Keyword(s):  
Blood Flow ◽  
Venous Blood ◽  
Cross Sectional Area ◽  
Popliteal Vein ◽  
Control Group ◽  
Venous Disease ◽  
Venous Blood Flow ◽  
Sectional Area ◽  
Cross Sectional ◽  
Experimental Group

Abstract Background During pregnancy, a number of changes affecting venous blood flow occur in the circulatory system, such as reduced vein wall tension or increased exposure to collagen fibers. These factors may cause blood stagnation, swelling of the legs, or endothelial damage and consequently lead to development of venous disease. Objectives The aim of this study is to evaluate the effect of special footwear designed to improve blood circulation in the feet on venous blood flow changes observed during advancing phases of pregnancy. Methods Thirty healthy pregnant women participated in this study at 25, 30, and 35 weeks of gestation. Participants were allocated at random to an experimental group (n = 15) which was provided with the special footwear, or a control group (n = 15). At each data collection session, Doppler measurements of peak systolic blood flow velocity and cross-sectional area of the right popliteal vein were performed using a MySonoU6 ultrasound machine with a linear transducer (Samsung Medison). The differences were compared using Cohen’s d test to calculate effect size. Results With advancing phases of pregnancy, peak systolic velocity in the popliteal vein decreased significantly in the control group, whereas it increased significantly in the experimental group. No significant change in cross-sectional area was observed in any of the groups. Conclusions Findings in the experimental group demonstrated that wearing the footwear tested may prevent venous blood velocity from reducing during advanced phases of pregnancy. Nevertheless, there is a need for further investigation of the beneficial effect on venous flow of the footwear tested and its application.

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