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Summary
Iohexol and iopamidol both provide excellent myelogram quality. However, iohexol demonstrated slightly fewer and less severe side effects compared to iopamidol in this study.
Area of Science:
- Radiology
- Neurology
- Pharmacology
Background:
- Myelography is a diagnostic imaging procedure.
- Contrast media are essential for myelography.
- Evaluating the safety and efficacy of different contrast media is crucial.
Purpose of the Study:
- To compare the safety and radiographic quality of iohexol and iopamidol in myelography.
- To assess the incidence and severity of adverse side effects associated with each contrast medium.
Main Methods:
- A randomized study involving 363 patients undergoing myelography.
- Patients received either iohexol (179) or iopamidol (184).
- Neurologic, psychological, cardiovascular, hematologic, and electroencephalography (EEG) assessments were performed pre- and post-procedure.
Main Results:
- Radiographic quality was equally adequate for both iohexol and iopamidol.
- Iohexol showed a slightly but significantly lower incidence and severity of adverse side effects compared to iopamidol.
- EEG revealed neuronal excitability in 3 patients receiving iopamidol, but none receiving iohexol.
Conclusions:
- Both iohexol and iopamidol are effective for producing high-quality myelograms.
- Iohexol appears to be associated with a marginally better safety profile than iopamidol, with fewer adverse events and no observed EEG changes indicative of neuronal excitability.