[Iopentol in varix radiography. Double blind comparison with iohexol]

Area of Science:

• Radiology
• Vascular Imaging
• Contrast Media

Background:

• Nonionic monomeric contrast agents are widely used in medical imaging.
• Iohexol is an established reference compound for safety and efficacy trials.
• Iopentol is a novel nonionic monomeric contrast agent requiring comparative evaluation.

Purpose of the Study:

• To compare the tolerance and safety of Iopentol versus Iohexol.
• To assess the efficacy of Iopentol in varicography.
• To evaluate potential adverse reactions and anatomopathological changes associated with these contrast agents.

Main Methods:

• A double-blind, parallel two-group comparison trial.
• Sixty adult patients undergoing varicography were randomized into two groups (30 per group).
• Patients received either Iopentol 300 mg/ml or Iohexol 300 mg/ml.

Main Results:

• No adverse reactions were reported in either treatment group.
• Minor, clinically insignificant changes in heart rate and blood pressure were observed.
• Immunohistochemical and histologic analyses showed no statistically significant differences between Iopentol and Iohexol groups.
• Radiographic efficacy was rated as "good" for all patients in both groups.

Conclusions:

• Iopentol and Iohexol are equally effective and well-tolerated nonionic monomeric contrast agents for varicography.
• Iopentol presents a safe and effective alternative to Iohexol in this specific application.
• The study confirms the safety profile of both agents with no significant adverse events or pathological changes observed.