title: Effect of Sn(II) ion concentration and heparin on technetium-99m red blood cell labeling.
abstract: While convenience and economy favor the use of in vivo methods for labeling red blood cells (RBCs) with [99mTc]pertechnetate, previous reports suggested that patient medication such as heparin might interfere and thus result in inferior quality images. In this study, using a canine model, the role of stannous Sn(II) ion in in vivo and in vitro labeling of RBCs both in the presence and absence of a therapeutic dose of heparin was investigated. Our results showed that Sn(II) ion concentration of 20 micrograms/kg body weight levels provided better than 80% in vivo labeling efficiency enabling high quality blood-pool images even in the presence of therapeutic doses of heparin.
mesh_terms: D000818:Animals; D004285:Dogs; D004912:Erythrocytes; D006493:Heparin / Q000627:therapeutic use*; D066298:In Vitro Techniques; D007477:Ions; D007553:Isotope Labeling / Q000379:methods*; D011933:Reagent Kits, Diagnostic; D013670:Sodium Pertechnetate Tc 99m; D014001:Tin; D014003:Tin Polyphosphates
chemical_list: D007477:Ions; D011933:Reagent Kits, Diagnostic; D014003:Tin Polyphosphates; D014001:Tin; D006493:Heparin; D013670:Sodium Pertechnetate Tc 99m