Final answer:
Nonbacteriostatic saline solution is used to clean wounds before obtaining a culture to preserve microorganisms for infection cause determination. Other cytotoxic solutions may affect culture results.
Step-by-step explanation:
A nonbacteriostatic saline solution is used to clean wounds before obtaining a culture because it does not kill microorganisms. This is important because the presence of microorganisms is needed to determine the cause of infection. Other solutions such as povidone-iodine, hydrogen peroxide, and sodium hypochlorite are cytotoxic and can skew culture results. Therefore, nonbacteriostatic saline solution is preferred for wound cleaning during culture collection.