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PubMed1977

[Anticoagulant activity of triiodinated x-ray opaque media (author's transl)].

The anticoagulant activity of the triiodinated X-ray opaque media iodipamide, iothalamate and diatrizoate on standardized normal human pool plasma was investigated in vitro. We found a dose dependent lengthening of the thrombin time, the reptilase time and the partial thromboplastin time together with a dose dependent drop of the calcium thromboplastin and factor V activity. Iodipamide proved to exert the most pronounced anticoagulant activity of the 3 contrast media tested. The results are interpreted as latent disseminated intravascular coagulation with hyperfibrinolysis following the direct interaction of contrast media with the coagulation enzymes.

Blood Coagulation↗
PubMed1977

[On the effect of iodine containing opaque media on erythrocyte acetylcholinesterase (author's transl)].

Clinical symptoms of side effects by iodinated opaque media are approximately similar to those caused by inhibition of acetylcholinesterase. The inhibition of acetylcholinesterase of human erythrocytes was tested with the following opaque media in vivo and in vitro: adipiodonmeglumine, meglumine-iothalamate and sodium-iothalamate. Apparently there is no connection between opaque media induced incompatibility and the inhibition of acetylcholinesterase because 1. by the time maximal inhibition is reached most of the renally excreted opaque media has been eliminated, and because 2. a fairly rapid reversibility of the inhibition follows. For patients with congenital variants of acetylcholinesterase it could be of clinical consequence under succinyldicholinanaesthesia.

Acetylcholinesterase↗