6、ssess(评估):判断导管功能是否健全;Clear(冲洗):避免药物间的相互作用,保持导管功能健全;Lock(封管):正确的封管手法+适当的封管溶液+最后的Lock=正压、有效、安全的封管。A-C-L金标准不建议生理盐水封管Comparison of occlusion rates by flushing solutions for periph-erally inserted central catheters with positivepressure Lueractivated devices.JInfusNurs.2008Jan-Feb;31(1):22-7.prospective