Why should saline for irrigation never be used for intravenous uses?

Saline for irrigation is not sterile enough for intravenous use, as it may contain contaminants that can lead to infections or other complications. Additionally, irrigation saline often has different concentrations and additives that are unsuitable for intravenous administration, which could cause harmful reactions. Using the correct formulation specifically designed for intravenous use ensures safety and efficacy in patient care.