RESUMO
BACKGROUND: For this research, we worked on the hypothesis that larger syringe sizes would not generate greater pressures (negative or positive) than smaller ones. This contradicts current practice and theory, which states that larger syringes produce lower pressures and are safer. AIM: To establish the most appropriate syringe size in a laboratory experiment. METHOD: We attached a manometer to a syringe with and without nasogastric tubes and measured negative pressures generated when aspirating, and positive pressures generated when injecting fluids. RESULTS: The findings suggest that smaller syringes generate lower pressures; further research is needed to confirm this. CONCLUSION: If we are correct there is a patient safetyissue, which must be addressed urgently. Also, smaller syringes may lead to significant cost savings.
