In the mortal world, death cannot be entirely denied. But it can be postponed.

Encounter ✦     Divine
Immediate Interrupt      Ranged 10

Channel Divinity: You can use only one channel divinity power per encounter

Trigger: A creature within 10 squares of you makes a death saving throw

Target: The triggering creature

Effect: The target gains a +10 power bonus to the death saving throw.

Published in Divine Power, page(s) 115.