Plasma Trapping in Hematocrit Determination. Differences Among Animal Species.

Chien, Shu; Dellenback, Robert J.; Usami, Shunichi; Gregersen, Magnus I.

doi:10.3181/00379727-119-30402

Cited by 53 publications

(22 citation statements)

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“…Differences in the concentrations and molecular characteristics of the various protein fractions accounted for the lower plasma viscosity in runners prior to exercise. In accord with previously reported studies (Chien, 1972(Chien, , 1975Chien et al, 1965Chien et al, , 1971, we found that plasma viscosity, in the resting state, depended largely on fibrinogen, total globulin, and, hence, total protein concentrations, while albumin concentration was not a significant determinant (Fig. 3).…”

Section: Discussionsupporting

confidence: 81%

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Effects of exercise on plasma viscosity in athletes and sedentary normal subjects

Letcher

Pickering

Chien

et al. 1981

Clinical Cardiology

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Summary:To assess the immediate and long-term effects of exercise on factors regulating blood flow, we measured plasma viscosity (qP) and plasma renin activity (PRA) in 17 trained runners and 16 sedentary healthy subjects before and 10 min after graded treadmill exercise. Resting vP was lower in runners primarily because of significantly lower fibrinogen concentration. Compared to nonrunners with similar 24-h urine electrolyte excretion rates, runners were characterized by lower PRA at rest. In view of the overall correlation between heart rate and PRA before exercise, reduced adrenergic tone was probably a major factor contributing to the lower PRA in runners. After exercise, plasma viscosity and PRA exceeded control levels, and were similar in magnitude in runners and sedentary subjects. Changes in plasma viscosity were less than expected from the degree of hemoconcentration, primarily because enhanced fibrinolysis maintained fibrinogen level constant. To the extent that plasma viscosity affects viscous flow resistance, the results suggest that tissue perfusion and oxygen delivery rate at rest are greater in trained runners than in sedentary subjects, but these variables become similar after maximum exertion.

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Section: Discussionsupporting

confidence: 81%

“…Hematocrit was determined in duplicate by centrifuging at 15,000 g for 5 min, and the average value was corrected for plasma trapping (Chien et al, 1965).…”

Section: Rheologic Measurementsmentioning

confidence: 99%

Effects of exercise on plasma viscosity in athletes and sedentary normal subjects

Letcher

Pickering

Chien

et al. 1981

Clinical Cardiology

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“…Because the blood flow was measured within a 5 % error as judged from the calibration of the pump, the percentage of plasma was measured with the haematocrit method within 1 % (Chien, Dellenback, Usami & Gregersen, 1965) and the water concentration of the plasma and the volume of secretion were determined with less than 1 % error. The flow of water through the stomach could be evaluated within an error that amounted, at the most, to about 7 % of the real value.…”

Section: Osmolality Of Canine Gastric Juice 285mentioning

confidence: 99%

Osmotic concentration of the gastric juice of dogs

Altamirano¹,

Izaguirre²,

Milgram³

1969

The Journal of Physiology

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1. The freezing point of the gastric juice, produced by histamine stimulation in anaesthetized dogs, of the arterial plasma and of the plasma obtained from a gastric vein were measured. 2. The osmolality of the blood that passes through the gastric mucosa increases during secretion of acid juice. 3. The amount of water that should be removed from the arterial plasma to obtain a solution isosmolal to the gastric venous plasma is equivalent to the amount of water required to dilute the secreted H+. From this result it is concluded that the increase of osmolality of the venous plasma is a consequence of the clearance of water free of solute by the gastric mucosa. 4. The gastric juice was hyposmotic to the venous plasma in twenty out of thirty dogs, being isosmotic to that plasma in seven dogs. Even in the last group of animals, the gastric secretion might be considered as slightly hypotonic to the venous blood that passes through the secretory part of the mucosa. 5. Considerations based on available data suggest that the ‘primary’ acid juice is usually hyposmotic to the extracellular fluid in the vicinity of the oxyntic cells.

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“…Hematokrit artışında geneııikle alyuvar sayısı ve alyuvar hacmi artışlarının roloynadığı, alyuvar sayısı arttıkça hücreleI'ce tutulan plazma miktarının da arttığı, buna karşılık alpıvarın hacmi büyü-düğünde ise azaldığı bildirilmektedir (9,14,22). Hematokrit değerin hastalık haııerinde değiştiği (2, 25, 27), ekstravasyon ve kaşekside (19), sıcakta (24), soğukta (21), heyecan haııerinde (31), riboflavin noksanlığında (I 5) arttığı, buna karşılık akut iltihaplanmalarda (27), anemi ve koli enfeksiyonlarında (2), akut ve kronik koksidiyozda (2, 25), uzun süreli susuzluk ve açlıkta (3) ise azaldığı bildirimler arasındadır.…”

Section: Introductionunclassified

ÜLTRAVİYOLE IŞINLAMASıNIN TAVUKLARDA ALYUVAR ÇÖKME HIZI VE HEMATOKRİT DEGER ÜZERİNE ETKİSİ

Bölükbaşi¹

1978

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Plasma Trapping in Hematocrit Determination. Differences Among Animal Species.

Cited by 53 publications

References 0 publications

Effects of exercise on plasma viscosity in athletes and sedentary normal subjects

Effects of exercise on plasma viscosity in athletes and sedentary normal subjects

Osmotic concentration of the gastric juice of dogs

ÜLTRAVİYOLE IŞINLAMASıNIN TAVUKLARDA ALYUVAR ÇÖKME HIZI VE HEMATOKRİT DEGER ÜZERİNE ETKİSİ

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