Publications (2)0 Total impact
Article: [Effects of intravenous injection of ioversol, a nonionic contrast medium, on circulating blood volume: comparison among different combinations of its dose and volume injected].[show abstract] [hide abstract]
ABSTRACT: Effects on circulating blood volume (CBV) of the intravenous injection of a nonionic contrast medium, ioversol, with various doses were assessed in order to find a way of injection with less effects on systemic circulation. Ioversol was injected as a bolus to 20 mongrel dogs at doses of A: 3.75 ml/kg (n = 8) or B: 2 ml/kg (n = 6) of a solution containing 320 mg iodine per ml, or C: 2 ml/kg (n = 6) of a 240 mgI/ml solution. Colloid oncotic pressure (COP) of the bloods drawn before and 1, 2, 3, 5 min after the injection of ioversol was measured by a needle type osmometer, and changes in CBV were calculated using the COP values. Upon injection of ioversol CBV increased rapidly and then gradually returned to the preinjection levels. The change in CBV induced by ioversol was significantly less than those reportedly induced by an ionic contrant medium, iothalamate, and a nonionic medium, iopamidol, and comparable to that by another nonionic medium, iohexol. The degree of increase in CBV and the blood concentration of ioversol were related to the amount, but not the volume, of ioversol injected. Thus, ioversol proved to be one of the low osmotic nonionic contrast media with less effects on CBV. Furthermore, it is suggested that the amount, rather than volume, of contrast medium should be taken into consideration when the angiography of the patients with reduced cardiac function, children or aged patients is performed in whom the contrast medium-induced CBV expansion needs to be as less as possible.Kokyu to junkan. Respiration & circulation 01/1994; 41(12):1191-5.
Article: [Contrast medium-induced expansion of circulating blood volume: Comparison between nonionic and ionic contrast media].[show abstract] [hide abstract]
ABSTRACT: We assessed whether the osmotic expansion of circulating blood volume (CBV) induced by nonionic contrast medium (NCM) is less than that induced by ionic contrast medium (ICM). Iohexol (Io) (NCM: 795 mO sm/kg H2O), 1.28 g iodine/kg, was injected intravenously into 5 mongrel dogs and blood samples were drawn at certain times. One week later, meglumine iothalamate (MI) (ICM: 1470 mOsm/kgH2O), 1.28 g iodine/kg, was injected into the same dogs. Another 5 dogs received MI first and Io one week later. Colloid oncotic pressure (COP) of the blood samples was measured by a needle osmometer, and changes in CBV were calculated from the COP values. The injection of Io or MI resulted in an immediate decrease in COP, and an increase in CBV at 1 min. MI induced significantly more severe and longlasting changes in COP and CBV than Io. Neither MI nor Io modified COP when they were added to the control blood samples. Thus, although NCM considerably expanded CBV, the magnitude of expansion induced by NCM was less than that induced by ICM. This may explain one of the reasons why NCM causes fewer adverse reactions than ICM.Kokyu to junkan. Respiration & circulation 12/1990; 38(11):1139-43.