Definition of "prolongation" [pro•lon•ga•tion]

• The act of prolonging. (noun)
• That which has been prolonged; an extension. (noun)

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• "This results in prolongation of half-life from 0.8 hours in healthy subjects to 1.3 hours in patients with moderate hepatic impairment and 2.4 hours in severely impaired patients."
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• "Massive expenditures for terminal cases in the last few months of life often lead to the deferral of death rather than anything that could be called the prolongation of life in any meaningful sense."