Quick answerPerform
line reconciliation by tracing the tubing end to end before connection.
Why this is correctLook-alike small-bore connectors can permit wrong-route delivery. FDA safety guidance recommends tracing the tube from the patient to the source during handoff and before making a connection.
Easy analogy or mental pictureFollow the railroad track to both endpoints before putting a train on it.
Memory hookTrace before you connect.NCLEX decision ruleWhen the route is uncertain, stop and verify the physical pathway; proximity, color, or memory is not enough.
Why the other choices are wrongThe nearest port may be the wrong system, the client may not know, and a trial connection can cause immediate serious harm.
References
1FDA: Examples of Medical Device MisconnectionsTube tracing and line reconciliation before connection