Blood viscosity measurements using a pressure-scanning capillary viscometer

2002 ◽  
Vol 16 (12) ◽  
pp. 1719-1724 ◽  
Author(s):  
Sehyun Shin ◽  
Do-Young Keum ◽  
Yun Hee Ku
Keyword(s):  
Blood Viscosity ◽  
Capillary Viscometer ◽  
Viscosity Measurements

Serial Blood Water Estimations and in-Line Blood Viscometry: The Continuous Measurement of Blood Volume during Dialysis Procedures

1984 ◽  
Vol 66 (5) ◽  
pp. 575-583 ◽  
Author(s):  
R. N. Greenwood ◽  
C. Aldridge ◽  
W. R. Cattell
Keyword(s):  
Blood Volume ◽  
Blood Viscosity ◽  
Packed Cell Volume ◽  
Continuous Measurement ◽  
Quantitative Measure ◽  
Capillary Viscometer ◽  
Extracorporeal Circuit ◽  
Volume Changes ◽  
Serial Measurements

1. It has been shown in vitro that serial measurements of blood water during ultrafiltration accurately reflect changing blood volume. 2. It has been shown that minute changes in blood hydration produce detectable changes in blood viscosity. 3. An ‘in-line’ capillary viscometer has been constructed which can be placed in parallel with an extracorporeal circuit to give a continuous semi-quantitative measure of blood viscosity during ultrafiltration or haemodialysis. By making serial measurements of blood water each ‘viscometer curve’ can be corrected to permit calculation of blood volume provided that the starting blood volume is known. 4. Blood volume changes of less than 1% can be detected in vitro and provided that blood volume changes solely as a result of the removal or influx of water it can be measured continuously to within an accuracy of 4% for volume changes up to 30% irrespective of starting packed cell volume or blood water.

Influence of anticoagulant, time and storing temperature on blood viscosity measurements

2016 ◽  
Vol 4 (4) ◽  
pp. 419-422
Author(s):  
E. Ernst ◽  
Ch. Roloff ◽  
I. Magyarosy ◽  
H. Drexel
Keyword(s):  
Blood Viscosity ◽  
Viscosity Measurements

Variations of whole blood viscosity using Rheolog™—a new scanning capillary viscometer

2003 ◽  
Vol 332 (1-2) ◽  
pp. 79-82 ◽  
Author(s):  
Sihe Wang ◽  
Anders H. Boss ◽  
Kenneth R. Kensey ◽  
Robert S. Rosenson
Keyword(s):  
Blood Viscosity ◽  
Whole Blood ◽  
Capillary Viscometer ◽  
Whole Blood Viscosity

Deep vein thromboses of lower extremities in burn patients: hemorheological aspects

2019 ◽  
Author(s):  
Е.Е. Биткова ◽  
В.С. Борисов ◽  
В.Б. Хватов ◽  
М.Ю. Каплунова ◽  
Е.В. Клычникова
Keyword(s):  
Blood Viscosity ◽  
Thermal Injury ◽  
Lower Extremities ◽  
Erythrocyte Aggregation ◽  
Capillary Viscometer ◽  
Shear Rates ◽  
Vein Thrombosis ◽  
Thrombotic Complications ◽  
Burn Disease ◽  
Deep Vein

Цель исследования: оценка роли гемореологических расстройств в патогенезе развития тромботических осложнений у пациентов с тяжелой термической травмой. Материалы и методы. Проведен проспективный анализ результатов обследования 55 пациентов (13 женщин и 43 мужчин) в возрасте 1888 лет с тяжелой термической травмой, из них 19 больных имели инструментально подтвержденный эпизод тромбоза глубоких вен (ТГВ) нижних конечностей 36 пострадавших составили группу сравнения. Исследование вязкости и эластичности крови выполняли в шоковом периоде ожоговой болезни (1е и 3и сутки с момента травмы), токсемии (10е сутки) и септикотоксемии (2030е сутки ожоговой болезни) на капиллярном вискозиметре BioProfiler (США). Индексы агрегации эритроцитов в покое и в движении определяли на агрегометре MA1 (Myrenne GmbH, Германия). Результаты. У пациентов с ТГВ наблюдали значимое снижение показателя гематокрита и агрегации эритроцитов. Индексы агрегации были значимо ниже у пострадавших с тромбозами (14,7 1,2 и 26,4 1,9) по сравнению с пациентами без тромбозов (17,3 0,8 и 29,5 1,3), также как и параметры вязкости крови при скоростях сдвига 2,5 с1 (3,66 0,28 мПа против 5,70 1,14 мПа), 12,6 с1 (3,54 0,37 мПа против 4,40 0,39 мПа) и 62,8 с1 (3,65 0,26 мПа против 4,0 0,25 мПа). Эластичность крови при высокой скорости сдвига (62,8 с1) в группе с тромбозами была значимо ниже (0,23 0,02 и 0,55 0,14 мПа, соответственно). Заключение. Гемореологическое обследование обожженных с ТГВ нижних конечностей выявило снижение показателей эластичности крови и агрегации эритроцитов по сравнению с пострадавшими без тромботических осложнений. Сочетание вискозиметрии, эластометрии и агрегометрии крови позволяет создавать гемореологический профиль ожоговой болезни и проводить стратификацию обожженных по степени риска развития тромботических осложнений. Aim: to assess the role of hemorheological disorders in the pathogenesis of thrombotic complications in patients with severe thermal injury. Materials and methods. A prospective analysis of 55 patients examination (13 women and 43 men) aged 1888 years with severe thermal injury was performed: 19 patients had an instrumental confirmed episode of deep vein thrombosis (DVT) of the lower extremities, 36 patients formed the comparison group. We investigated blood viscosity and elasticity in the shock period of burn disease (1st and 3rd days after the injury), in the stages of toxemia (10th day) and septicotoxemia (2030th days of burn disease) on the BioProfiler capillary viscometer (USA). Erythrocyte aggregation indices at rest and in motion were determined on MA1 aggregometer (Myrenne GmbH, Germany). Results. In patients with DVT we observed a significant decreasing of hematocrit and erythrocytes aggregation. Aggregation indices were significantly lower in patients with thrombosis (14.7 1.2 and 26.4 1.9) compared to patients without thrombosis (17.3 0.8 and 29.5 1.3), as well as blood viscosity parameters at shear rates 2.5 s1 (3.66 0.28 mPа vs. 5.70 1.14 mPа), 12.6 s1 (3.54 0.37 mPа vs. 4.40 0.39 mPа) and 62.8 s1 (3.65 0.26 mPа vs. 4.0 0.25 mPа). The blood elasticity at high shear rate (62.8 s1) in the group with thrombosis was significantly lower (0.23 0.02 and 0.55 0.14 mPa, respectively). Conclusion. Hemorheological examination of burned patients with DVT of lower extremities revealed decreasing of blood elasticity and erythrocytes aggregation compared with the burned patients without thrombotic complications. The combination of blood viscometry, elastometry and aggregometry allows to create a hemorheological profile of burn disease and stratifies burned patients according to the degree of thrombotic complications risk.

Hemorheology: the critical role of flow type on blood viscosity measurements

Soft Matter ◽  
2021 ◽  
Author(s):  
Elahe Javadi ◽  
Safa Jamali
Keyword(s):  
Drug Delivery ◽  
Blood Viscosity ◽  
Crucial Role ◽  
Critical Role ◽  
Blood Rheology ◽  
Viscosity Measurements ◽  
Flow Type

The crucial role of hemorheological characteristics of blood in a range of diagnoses, treatments and drug delivery mechanisms is widely accepted. Nonetheless, the literature on blood rheology remains inconclusive and...

A newly designed oscillating viscometer for blood viscosity measurements

Biorheology ◽  
1996 ◽  
Vol 33 (4-5) ◽  
pp. 397-404 ◽  
Author(s):  
K HAUSLER ◽  
W REINHART ◽  
P SCHALLER ◽  
J DUAL ◽  
J GOODBREAD ◽  
...  
Keyword(s):  
Blood Viscosity ◽  
Viscosity Measurements ◽  
Oscillating Viscometer
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