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Shear stress and force required for tether formation of neonatal and adult erythrocytes.

Abstract：

:Red blood cells (RBC) of neonates have a shorter survival time and they are more susceptible to mechanical alterations than RBC of adults. Irreversible alteration of the membrane of RBC of preterm neonates, term neonates and adults due to tether formation was studied by means of a micropipette technique. Shear stress and forces were applied with this technique in an axisymmetric configuration and were calculated with an approximation method. The applied shear stress and forces that induced tether formation were lowest for RBC of preterm neonates (1.5 Pa, 1.8 pN), in between for RBC of neonates (1.7 Pa, 2.1 pN) and highest for RBC in adults (1.9 Pa, 2.6 pN). Decreased mechanical stability of the membrane of neonatal RBC may in part cause the shorter life span, the greater tendency to endocytosis and the higher amount of irregularly shaped cells of neonatal RBC compared to RBC in adults.

journal_name

Clin Hemorheol Microcirc

journal_title

Clinical hemorheology and microcirculation

authors

Ruef P,Gehm J,Gehm L,Pöschl J

doi

10.3233/CH-2011-1390

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

119-28

issue

1

eissn

1386-0291

issn

1875-8622

pii

G0R28614414Q1H2U

journal_volume

48

pub_type

杂志文章

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