Effects of ovariectomy on blood and plasma viscosity, fibrinogen and whole blood filterability

The hemorheologic changes in three groups of patients suffering from acute and chronic cerebrovascular diseases were studied. Firstly, a horizontal study on 57 patients with definite stroke and on 49 patients with TIA was made. Plasma viscosity, whole blood filtration rate, fibrinogen concentration and hematocrit were evaluated as markers of the rheological property of blood. Blood samples were drawn within 6 h from the onset of vascular syndrome. The findings were compared with values obtained in 112 as controls. At the same time, washed red cell filtration rate, together with lactoferrin, betaglucuronidase and beta-thromboglobulin plasma level were assayed. In both groups the onset of the vascular storm was associated with a marked increase of plasma fibrinogen and of blood and plasma viscosity and a significant decrease of whole blood filterability. Lactoferrin, betaglucuronidase and beta-thromboglobulin levels were also significantly increased. Following this, a longitudinal study was performed on 27 patients with definite stroke and 32 patients with TIA. The clinical regression of acute stroke was associated with the progressive reduction of rheological abnormalities. Finally, 81 patients with clinical diagnosis of cerebrovascular disease due to previous stroke or repeated TIA were studied together. An increase of blood viscosity, of fibrinogen concentration and of hematocrit and a decrease of blood filtration rate together with higher levels of beta-thromboglobulin were registered. These results confirm the existence of an association between CVD and hemorheological alterations and suggest more in depth research directed towards identifying the significance of these alterations in the pathogenesis of tissue ischemia. They also serve to introduce a rationale for the pharmacological and therapeutical corrections of these syndromes.

Download Full-text

The Effects of KBT-3022, a New Anti-platelet Agent, on Hemorheological Properties in Guinea Pigs

Thrombosis and Haemostasis ◽

10.1055/s-0038-1653735 ◽

1995 ◽

Vol 73 (01) ◽

pp. 118-121 ◽

Cited By ~ 6

Author(s):

Noriko Yamamoto ◽

Koichi Yokota ◽

Akira Yamashita ◽

Minoru Oda

Keyword(s):

Shear Stress ◽

Blood Viscosity ◽

Guinea Pigs ◽

Direct Action ◽

Plasma Viscosity ◽

Fibrinogen Concentration ◽

Anti Platelet Agent ◽

Blood Filterability ◽

2,3 Dpg ◽

Rbc Deformability

SummaryUsing guinea pigs, a study was conducted on the effects of KBT-3022, a new anti-platelet agent, on hemorheological properties in various tests including blood filterability, blood viscosity, shear stress-induced red blood cell (RBC) deformability and contents of ATP and 2,3-diphosphoglycerate (2,3-DPG). Oral administration of KBT-3022 at 1 and 10 mg/kg significantly increased blood filterability, and significantly reduced blood viscosity at 10 mg/kg without changing the hematocrit, plasma fibrinogen concentration or plasma viscosity. KBT-3022 (10 mg/kg, p.o.) improved RBC deformability in response to shear stress, which was evoked by passing the blood through a thin tube. This dose of KBT-3022 also increased the contents of ATP and 2,3-DPG in RBC. These findings indicate that KBT-3022 may reduce blood viscosity as a sequel to improvement of RBC deformability through direct action on RBC. The increase in the intracellular levels of ATP and 2,3-DPG was considered to be involved in this improvement of hemorheological properties. These hemorheological effects of KBT-3022 appear to be promising for the treatment of patients with ischemic vascular disease.

Download Full-text

Viscosity and Red Cell Deformity in Arterial Disease

10.1055/s-0038-1665789 ◽

1979 ◽

Author(s):

G Cella ◽

H de Haas ◽

M Rampling ◽

V Kakkar

Keyword(s):

Vascular Disease ◽

Blood Viscosity ◽

Whole Blood ◽

Arterial Disease ◽

Plasma Viscosity ◽

Control Group ◽

Fibrinogen Concentration ◽

Red Cell ◽

Whole Blood Viscosity ◽

Significant Difference

Haemorrheological factors have been shown to be affected in many kings of vascular disease. The present study was undertaken to correlate these factors in normal subjects and patients suffering from peripheral arterial disease. Twenty-two patients were investigated; they had moderate or severe intermittent claudication, extent of disease being confirmed by aorto-arteriography and ankle-systolic pressure studies. Twenty-five controls with no symptoms or signs of arterial disease were selected with comparable age and sex distribution. Whole blood viscosity was measured at shear rates of 230 secs-1 and 23 secs-lat 37°c using a Wells Brookfield cone plate microvisco meter. Plasma viscosity was also measured in an identical manner. Erythrocyte flexibility was measured by centrifuge technique and fibrinogen concentration as well as haematocrit by standard techniques. The fibrinogen concentration appeared to be the only significant parameter; the mean concentration in patients with peripheral vascular disease of 463 ± 73mg/l00ml in the control group ( < 0.05). Although whole blood viscosity was high in patients, when corrected to a common haematocrit, there was no significant difference between patients and controls. The same megative correlation was found for plasma viscosity. The red cell flexibility was found to be increased in patients as compared to the control group, but this effect appeared to be simply proportional to the fibrinogen concentration.

Download Full-text

Reduction of low-density lipoprotein cholesterol, plasma viscosity, and whole blood viscosity by the application of pulsed corona discharges and filtration

Review of Scientific Instruments ◽

10.1063/1.4797478 ◽

2013 ◽

Vol 84 (3) ◽

pp. 034301

Author(s):

Jin M. Jung ◽

Alexander Fridman ◽

Daniel J. Cho ◽

Young I. Cho

Keyword(s):

Blood Viscosity ◽

Whole Blood ◽

Low Density Lipoprotein ◽

Density Lipoprotein ◽

Plasma Viscosity ◽

Low Density ◽

Low Density Lipoprotein Cholesterol ◽

Whole Blood Viscosity ◽

Pulsed Corona ◽

Pulsed Corona Discharges

Download Full-text

Alteration of the erythrocyte ultrastructure and blood viscosity by morphine

Canadian Journal of Physiology and Pharmacology ◽

10.1139/y78-036 ◽

1978 ◽

Vol 56 (2) ◽

pp. 245-251 ◽

Cited By ~ 3

Author(s):

E. B. Vadas ◽

E. A. Hosein

Keyword(s):

Cell Volume ◽

Blood Viscosity ◽

Whole Blood ◽

Plasma Viscosity ◽

Cell Geometry ◽

Flow Properties ◽

Mean Cell Volume ◽

Morphine Administration ◽

The Mean ◽

Volume Cell

The effects of acute morphine administration on intact erythrocytes and on their flow properties were studied by measuring the mean cell volume, cell geometry, and whole blood and plasma viscosities. Morphine caused a small (2–7%) increase in mean cell volume. Changes in cell geometry were found to be time dependent and most pronounced in concave portions of the red cells. Whole blood viscosity was found to decrease upon morphine treatment; this may be due in part to a concurrent decrease in plasma viscosity.

Download Full-text

Continuous Lumbar Plexus Block under the Guidance of the “Shamrock Method” Ultrasound: Analgesic Effects and Hemodynamic Effects after Total Knee Arthroplasty in Elderly Patients

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2021/3531236 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Jinpei Xue ◽

Xiang Fu ◽

Zurong Hu

Keyword(s):

Elderly Patients ◽

Shear Viscosity ◽

Whole Blood ◽

Sensory Nerve ◽

Onset Time ◽

Plasma Viscosity ◽

Lumbar Plexus ◽

Nerve Blocks ◽

Lumbar Plexus Block ◽

Plexus Block

Objective. To explore the effect of continuous lumbar plexus block guided by the “Shamrock method” on postoperative analgesia and hemodynamics in elderly patients after total knee arthroplasty (TKA). Methods. From January 2020 to December 2020 in our hospital, 98 patients who underwent TKA were selected. Using the random number table method, the patients were divided into two groups: a continuous lumbar plexus block group (group L), with 49 patients, and a continuous femoral nerve block group (group F), with 49 patients. The onset time and maintenance time of motor and sensory nerve blocks in patients were recorded. A visual analogue scale (VAS) was applied to assess the pain severity at 6, 12, 24, and 48 h after the operation. The VAS score (FVAS) was applied to evaluate the pain severity of the patients during 24 and 48 h after the operation and knee joint functional exercise. The levels of hemodynamic indexes such as heart rate, mean arterial pressure, and oxyhemoglobin saturation and the levels of hemorheological indexes such as plasma viscosity, high and low whole blood shear viscosity, fibrinogen, and hematocrit were detected and compared between the two groups immediately after the operation and at 12 h and 48 h after the operation, respectively. The incidence of adverse reactions induced by anesthesia was counted. Results. The onset time of motor and sensory nerve blocks in group L was lower than that in group F, and the maintenance time was higher than that in group F ( P < 0.05 ). The VAS scores of 6, 12, 24, and 48 h after operation in group L were significantly lower than those in group F ( P < 0.05 ). The FVAS scores of group L at 24 and 48 h after operation were significantly lower than those of group F ( P < 0.05 ). The heart rates of the patients in the two groups were higher at 12 h and 48 h after operation than those immediately after operation ( P < 0.05 ). The heart rates at 12 h and 48 h after operation in group L were lower than those in group F ( P < 0.05 ). The plasma viscosity, high whole blood shear viscosity, and low whole blood shear viscosity in the group L at 12 h and 48 h after operation were lower than those in group F ( P < 0.05 ). There was no significant difference in the incidence of local anesthetic poisoning, nausea, vomiting, urinary retention, pruritus, and other adverse reactions between the two groups ( P > 0.05 ). Conclusion. The “Shamrock method” ultrasound-guided continuous lumbar plexus block in elderly patients after TKA has good analgesic effect, stable hemodynamics, little influence on hemorheology, and good safety. It is of great value to enhance the surgical effect and promote postoperative rehabilitation.

Download Full-text