Usage Note
perfusion is the standard medical term for an intravenous drip. Mettre sous perfusion means to put someone on a drip. Figuratively, mettre sous perfusion describes keeping a failing institution alive with external support — for example, une entreprise sous perfusion de subventions.
Examples
"Le patient est sous perfusion depuis ce matin."
Natural Translation
The patient has been on a drip since this morning.

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