title: Effect of iodinated contrast media on ionic calcium.
abstract: This study was conducted to characterize the alterations in serum ionized calcium induced by contrast media (CM) and to determine the cause of the change. Fresh human blood samples as well as an electrolyte solution (ES) containing 1.2 mM calcium ions were diluted with CM and alterations in ionized calcium were measured using an electrometer. The CM tested were diatrizoate, iopamidol, iohexol, ioxaglate, isotonic saline, Na2-Ca-EDTA and pure meglumine. When CM were mixed with blood, ionic CM produced a greater decrease in ionized calcium than nonionic CM or saline. When mixed with ES, a significant reduction of ionized calcium was induced by ioxaglate and diatrizoate in comparison with saline. Na2-Ca-EDTA and meglumine caused no reduction in ionized calcium. Ioxaglate and diatrizoate caused calcium binding due to anions; binding induced by the latter was more prominent than that by the former. These observations suggest that a nonionic CM is more desirable for coronary arteriography of high-risk patients.
authors.affiliation: Department of Radiology, Kyoto City Hospital, Kyoto University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hayakawa
authors.forename: Y
authors.initials: Y
authors.lastname: Okuno
authors.forename: K
authors.initials: K
authors.lastname: Fujiwara
authors.forename: Y
authors.initials: Y
authors.lastname: Shimizu
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood* / Q000494:pharmacology; D002712:Chlorides / Q000494:pharmacology; D003287:Contrast Media / Q000494:pharmacology*; D003974:Diatrizoate Meglumine / Q000494:pharmacology; D004492:Edetic Acid / Q000494:pharmacology; D006801:Humans; D007454:Iodides / Q000494:pharmacology; D007472:Iohexol / Q000494:pharmacology; D007479:Iopamidol / Q000494:pharmacology; D007485:Ioxaglic Acid / Q000494:pharmacology; D007552:Isotonic Solutions; D011188:Potassium / Q000494:pharmacology; D012709:Serum Albumin / Q000032:analysis / Q000187:drug effects; D012964:Sodium / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology
chemical_list: D002712:Chlorides; D003287:Contrast Media; D007454:Iodides; D007552:Isotonic Solutions; D012709:Serum Albumin; D003974:Diatrizoate Meglumine; D007472:Iohexol; D012965:Sodium Chloride; D004492:Edetic Acid; D012964:Sodium; D007479:Iopamidol; D011188:Potassium; D002118:Calcium; D007485:Ioxaglic Acid