[The effect of direct x-ray contrast lymphography on pulmonary perfusion function]

Area of Science:

• Medical Imaging
• Pulmonary Medicine
• Radiology

Background:

• Pulmonary microcirculation is crucial for lung function.
• Lymphography is an imaging technique used to visualize lymphatic vessels.
• Oily radiopaque substances are sometimes used in lymphography.

Purpose of the Study:

• To investigate the impact of straight radiopaque lymphography using an oily substance on pulmonary microcirculation.
• To assess changes in lung perfusion following the procedure.

Main Methods:

• Twenty-five participants (8 males, 17 females) underwent straight radiopaque lymphography with an oily substance.
• Pulmonary perfusion pulmoscintigraphy using 99m-Tc-macroaggregate (TCK-8) was performed.
• Perfusion was evaluated 24 hours and 10 days post-procedure.

Main Results:

• A significant decrease in 99m-Tc-macroaggregate accumulation was observed in the lower lung portions 24 hours after lymphography.
• Normal radiotracer dispersal was noted 10 days after the procedure.
• The findings indicate a temporary alteration in pulmonary microcirculation.

Conclusions:

• Straight radiopaque lymphography with an oily substance may temporarily affect pulmonary microcirculation.
• The radiopaque substance might potentially stimulate inflammatory processes in chronic nonspecific lung diseases.
• Further research is warranted to understand the long-term implications and mechanisms.