title: Effects of two different hydroxyethyl starch solutions (HES200/0.5 vs. HES130/0.4) on the expression of platelet membrane glycoprotein.
abstract: BACKGROUND
  There are various hydroxyethyl starch (HES) solutions with different degrees of hydroxylation and different molecular weights. HES200/0.5 solution is most commonly used. HES130/0.4 is a new HES solution and is the 'state-of-the-art' in volume substitution. However, the mechanism of the observed anticoagulation action of HES has not been fully delineated. The objective of this study was to further investigate the effect of HES200/0.5 and HES130/0.4 on platelet coagulation.
  
  
  METHODS
  Sixty ASA I-II patients undergoing elective minor surgery were randomly allocated to receive an intravenous infusion (20 ml/kg) of lactated Ringer's solution (group L), HES200/0.5 (group H) or HES130/0.4 (group V) after the induction of anesthesia. The expression of CD42b, CD41/61 and CD62p in vivo was assessed on non-stimulated platelets and adenosine diphosphate (ADP) agonist-activated platelets using flow cytometry.
  
  
  RESULTS
  Resting glycoprotein expression of the non-stimulated platelets was observed. HES200/0.5 and HES130/0.4 reduced the CD42b, CD41/61 and CD62p expression of ADP-agonist-activated platelets at 15 min after intravenous infusion. At 6 h after intravenous infusion, the trend of decreasing expression of activated CD42b, CD41/61 and CD62p was maintained in group H. However, CD42b, CD41/61 and CD62p expression returned to the pre-operative level in group V.
  
  
  CONCLUSIONS
  This study showed that both HES200/0.5 and HES130/0.4 can inhibit platelet coagulation. Platelet dysfunction experienced a faster recovery after the infusion of HES130/0.4 than after HES200/0.5. Liquid resuscitation with HES130/0.4 may decrease the risk of hemorrhage in the operative period.
authors.affiliation: Department of Anesthesiology, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
authors.forename: G
authors.initials: G
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Yan
authors.forename: Q H
authors.initials: QH
authors.lastname: Lu
authors.forename: M
authors.initials: M
authors.lastname: Gong
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D000328:Adult; D000758:Anesthesia; D001792:Blood Platelets / Q000187:drug effects / Q000378:metabolism*; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D005260:Female; D005434:Flow Cytometry; D006023:Glycoproteins / Q000096:biosynthesis*; D006801:Humans; D006895:Hydroxyethyl Starch Derivatives / Q000008:administration & dosage / Q000494:pharmacology*; D007262:Infusions, Intravenous; D008297:Male; D008875:Middle Aged; D019007:P-Selectin / Q000096:biosynthesis / Q000235:genetics; D010952:Plasma Substitutes / Q000008:administration & dosage / Q000494:pharmacology*; D019039:Platelet Glycoprotein GPIIb-IIIa Complex / Q000378:metabolism; D019038:Platelet Glycoprotein GPIb-IX Complex / Q000378:metabolism
chemical_list: D006023:Glycoproteins; D006895:Hydroxyethyl Starch Derivatives; D019007:P-Selectin; D010952:Plasma Substitutes; D019039:Platelet Glycoprotein GPIIb-IIIa Complex; D019038:Platelet Glycoprotein GPIb-IX Complex; D000244:Adenosine Diphosphate