[The mechanism of histamine liberation from rat mast cells under the action of x-ray contrast media].

It was demonstrated in rat experiments that a positive direct correlation exists between the decrease in the amount of histamine in rat peritoneal must cells after intravenous infusion of radiopaque agents (ROA) in a dose of 2 ml/kg and the amount of these penetrating from the blood into the peritoneal cavity. The degree of penetration is determined by the chemical structure and/or physiochemical properties of the ROA.