instrumental/causal で (by means of, due to)

She got into an argument and lost herself in anger.

She lost her memory in a traffic accident.

She fastened the door and the window with a slide bolt.

She got hurt in a traffic accident.

She was speechless with shock.

She lost her mind from the shock.

The rough seas left her seasick.

She's been sick in bed since last Monday.

She's been laid up sick for the past week.