HeparinsManufacturerintroductionHeparin(includingheparinsodium,heparincalciumandlowmolecularweightheparin)isananticoagulant.Classificationofheparin(1)Ordinary(standard)Heparinisextractedfromthemucousm
1.Oralheparinisineffective.Notsuitableforintramuscularinjection,becauseintramuscularinjectioncancausehematomaattheinjectionsite.Intravenousinjection,intravenousdripanddeepsubcutaneousinjectioncanbeuse
Theanticoagulanteffectofheparinisgenerallythoughttobemainlythroughtwoaspects:①inhibitionofthrombin;②InhibitoryeffectoncoagulationactivefactorXa(FXa).Bothofthemdependonthebindingofthepentosestructure
Heparinisaglycosaminoglycan,whichisahighlydispersedsulphatepolysaccharidewithunevenstructure.Lowmolecularweightheparinisdefinedinthefollowingtwoways:1.Heparinwithmolecularweightbetween4000and6500dalto