[Serum and tissue silver levels after burns treated with silver compounds]

Area of Science:

• Biomedical Science
• Pharmacology
• Toxicology

Background:

• Topical silver compounds are widely used for burn wound management.
• Understanding the systemic absorption and distribution of silver from topical agents is crucial for safety and efficacy assessments.

Purpose of the Study:

• To investigate and compare serum and tissue silver levels following the topical application of 10% silver nitrate and 1% silver sulfadiazine cream in a rabbit burn model.

Main Methods:

• Four groups of rabbits were used: two with burns treated with silver nitrate or silver sulfadiazine, and two control groups with unburned skin receiving the same agents.
• Serum silver levels were measured at multiple time points post-application (days 1, 3, 7, 15, 21, 28).
• Tissue silver levels in the kidney and liver were determined after sacrifice on day 28 using atomic absorption spectrophotometry.

Main Results:

• Serum silver levels peaked around day 3 and gradually decreased, with minimal detection by day 28.
• Silver deposition was higher in the liver compared to the kidney.
• No significant differences in serum or tissue silver levels were found between the 10% silver nitrate and 1% silver sulfadiazine treatment groups.

Conclusions:

• Topical 10% silver nitrate and 1% silver sulfadiazine cream result in comparable systemic silver absorption and tissue distribution in burn-injured rabbits.
• These findings suggest similar pharmacokinetic profiles for both agents in this model, supporting their use in burn care.