Comparative hemorheology—Hematological implications of species differences in blood viscosity

Chien, Shu; Usami, Shunichi; Dellenback, Robert J.; Bryant, Cyrus A.

doi:10.3233/bir-1971-8106

Cited by 129 publications

(55 citation statements)

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“…The exponential increase in blood viscosity with hematocrit for those species investigated here (Figure 1) was typical of vertebrate blood, and similar to that reported for fish (Graham and Fletcher, 1983), amphibians (Chien et al, 1971;Weathers, 1976a), birds Viscor et.!. !., 1984) and mammals (Stone et al, 1968;Guard and Murrish, 197;;Snyder and Weathers, 1977).…”

Section: Discussionsupporting

confidence: 65%

“…Ectotherms are generally characterized by having lower, or variable, Tbs, and also have lower hematocrits and/or MCHCs (Chien et al, 1971; Table I). It would seem likely that ectotherms would incur fluctuations in blood flow due to the temperature dependence of blood viscosity, whereas endotherms with high and constant Tbs would not.…”

Section: Discussionmentioning

confidence: 99%

“…There are species specific differences in the viscosity of vertebrate blood for ectotherms (Maclean et al, 1975;Graham and Fletcher, 1983;Graham et al, 1985;Chien et al, 1971) and endotherms (Maclean, 1981;Usami et al, 1969). These species differences are the result of variations in plasma viscosity (Chien, , 1971, the presence or absence of an erythrocyte nucleus Gaehtgens et al, 1981a,b) and the shear dependent, non-Newtonian behavior ot erythrocytes (Guard and Murrish, 1975;Halikas, 1971;Maclean, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…These species differences are the result of variations in plasma viscosity (Chien, , 1971, the presence or absence of an erythrocyte nucleus Gaehtgens et al, 1981a,b) and the shear dependent, non-Newtonian behavior ot erythrocytes (Guard and Murrish, 1975;Halikas, 1971;Maclean, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Aspects of cardiovascular oxygen transport in vertebrates

Hedrick¹

2000

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The hematological and rheological characteristics of blood from a number of vertebrates was compared to assess possible species differences in blood viscosity that may influence cardiovascular oxygen The predicted in vitro optimal hematocrit (Bo) for oxygen transport was determined for each species and compared to the observed ill.1i!2. hematocrit (Bet). There was a very close correspondence between the predicted Bo and the observed normal Bet for the blood tested, with the exception of elephant seal (Mirounga angustirostris) blood.Resting and maxim.al rates of blood flow at lOoc, 2ooc and 3oocwere measured in Bufo marinus with magnetic blood flow probes to assess the relative contributions of heart rate, systemic arch pulse volume and arteriovenous (A-V) oxygen difference to increased oxygen consumption (V02). A-V 02 difference accounted for 100%, 84% and 88% of the increase in V02 during maximal exercise at iooc, 2ooc and 3ooc, respectively.Systemic arch pulse volume remained nearly constant over a wide range of heart~rates (15-115 beats min-l)thus contributing little to increased cardiac output during increased V02.Changes in blood flow rates through the systemic arches of resting toads were predicted by in vitro changes in blood viscosity over a 1ooc to 30oc interval. Resting animals did not appear to actively compensate for the passive alterations in viscosity that seemed to influence blood flow rates in viyo.

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aspects of cardiovascular oxygen transport in vertebrates

Hedrick¹

2000

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“…At higher shear rates (>150 s -1 ), a transition to a Newtonian behavior can be seen stabilizing at ~4 mPa.s, which is very close to that of blood in this particular range . The average curve corresponding to whole blood was obtained from data found in the literature [31][32][33][34][35][36][37].…”

Section: Dynamic Viscosity Dependence On Shear Ratementioning

confidence: 99%