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- W2153112074 abstract "A nonionic dimer (DL-3-117) containing a novel substituent (D,L amino-threitol) was synthesized and tested as an intrathecal contrast medium. In the complement-mediated assay, the dimer was approximately half as inhibitory of hemolysis as metrizamide or iopamidol. The lethal dose (LD50) in protozoa was 320 mg I/ml for DL-3-117, 96 mg I/ml for metrizamide, and 101 mg I/ml for iopamidol. The intravenous LD50 of DL-3-117 in mice was 26 g/kg, and in rats it was 12.7 g/kg. The effective dose (ED50) of intradiencephalic injection in rats was 219 mg I/kg for DL-3-117, 61.9 mg I/kg for metrizamide, and 154.1 mg I/kg for iopamidol, which are significantly different. A dose of 300 mg I/kg injected into a permanently cannulated lateral ventricle produced neurofunctional deficits with all contrast media except DL-3-117, which scored equal to Ringer's solution. Metrizamide and iopamidol in the same model, adapted for aversion conditioning, induced aversion with 45 mg I/kg, while DL-3-117 did not condition the rats." @default.
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- W2153112074 date "1982-01-01" @default.
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- W2153112074 title "Nonionic dimer: development and initial testing of an intrathecal contrast agent." @default.
- W2153112074 doi "https://doi.org/10.1148/radiology.142.1.6895557" @default.
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