title: Prevention of dextran-induced anaphylactic reactions by hapten inhibition. III. A Scandinavian multicenter study on the effects of 20 ml dextran 1, 15%, administered before dextran 70 or dextran 40.
abstract: In an open, prospective multi-center study prevention of dextran-induced anaphylactic reactions (DIAR) was attempted by intravenous injection of 20 ml dextran 1, 15%, Mw 1000 dalton, (Promiten), two minutes before start of infusion of dextran 70 (Macrodex) or dextran 40 (Rheomacrodex). Of 34955 patients investigated, only one developed a severe DIAR of grade III (0.003%). The incidence of severe DIAR after preinjection of 20 ml dextran 1 is significantly lower than that after injection of 10 ml dextran 1 (p = 0.01), and is also markedly lower than that of a large Swedish historical control material (0.037-0.050%). The incidence of mild DIAR is not affected by dextran 1. Adverse reactions to dextran 1 of a generally mild and short-lasting nature were observed in 20 patients. It is recommended that patients who are going to receive dextran 70 or 40 are given a prophylactic i.v. injection of 20 ml dextran 1 before the first unit of clinical dextran to minimize the risk of severe DIAR.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000707:Anaphylaxis / Q000276:immunology / Q000517:prevention & control*; D000936:Antigen-Antibody Complex; D001667:Binding, Competitive; D002648:Child; D002986:Clinical Trials as Topic; D003911:Dextrans / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology; D005260:Female; D006241:Haptens / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008970:Molecular Weight; D011446:Prospective Studies
chemical_list: D000936:Antigen-Antibody Complex; D003911:Dextrans; D006241:Haptens