A 38-year-old veteran with documented post-traumatic stress disorder is hospitalized for cellulitis. This morning the client was calm, oriented to person, place, and time, and the Confusion Assessment Method screen was negative. The client has no history of psychosis and has taken no new medications today. Seconds after a metal supply cart crashes in the hallway, the client crouches behind the bed, shouts "Incoming!", sweats, and scans the room as if under attack. Heart rate is 128/min. The client does not answer questions about the hospital stay and pulls away when a staff member reaches toward the shoulder. Capillary glucose is 104 mg/dL. Complete the diagram by selecting the condition the client is most likely experiencing, 2 actions the nurse should take to address that condition, and 2 parameters the nurse should monitor to assess the client's progress.

Quick answer
PTSD flashback triggered by a sound; say the client's name calmly from within view and guide the client to name objects in the room, then monitor orientation to the current place and date and heart rate.

Why this is correct
The trigger, the immediate onset, the content (combat danger), and the normal baseline earlier today all point to re-experiencing rather than a new medical or psychotic process. Grounding techniques anchor the client in present sensory detail, and a calm, visible approach avoids adding a new perceived threat. As the flashback ends, orientation returns and arousal falls.

Easy analogy or mental picture
Picture the brain replaying an old video on full screen: the nurse gently brings the real room back into the picture, one object at a time.

Memory hook
Trigger + past danger acted out now = flashback: name, view, ground; no surprise touch.

NCLEX decision rule
For acute distress after a trigger in a client with known trauma, use the least restrictive, trauma-informed response first and monitor return to present orientation.

Why the other choices are wrong
Delirium develops over hours to days and fluctuates; this client had a negative CAM screen this morning and reacted within seconds to a trigger, so a CAM result tracks the wrong problem. A panic attack causes fear and arousal, but the client stays oriented to the present, and paper-bag breathing is an outdated practice that can cause hypoxemia. There is no history of psychosis, and the content is a trauma memory, so haloperidol and hallucination checks do not fit. Unexpected touch can intensify the flashback. Glucose is already normal and does not track recovery.