Establishing normal values for nickel in human lung disease

Area of Science:

• Environmental Health
• Toxicology
• Occupational Health

Background:

• Nickel refining industry workers exhibit elevated lung nickel concentrations.
• Assessing nickel exposure requires understanding normal local population values.
• Local environmental factors like air and soil nickel content influence baseline levels.

Purpose of the Study:

• To determine if standard surgical instruments cause nickel contamination in lung tissue samples.
• To investigate the impact of proximity to a nickel refinery on lung nickel content in the general population.

Main Methods:

• Autopsy lung tissue samples were collected from 50 individuals in Vest Agder, Norway.
• Two samples per individual were taken: one with standard surgical tools and one with titanium/plastic instruments.
• Nickel content was analyzed and compared based on sampling method and proximity to a nickel refinery.

Main Results:

• Samples from standard scalpels showed significantly higher nickel content (0.64 µg/g) than those from titanium knives (0.29 µg/g).
• Individuals living within 8 km of the refinery had higher lung nickel levels (0.41 µg/g) compared to those living further away (0.18 µg/g).
• No significant difference in nickel content was observed between males and females.

Conclusions:

• Surgical sampling instruments can introduce measurable nickel contamination.
• Proximity to environmental nickel sources, like refineries, affects lung nickel burden in the general population.
• Accurate background nickel values necessitate using nickel-free sampling tools and selecting individuals without known environmental nickel exposure.