About the life transfer technique, it's a advanced medical ninjutsu, Sakura wasnt dead when it used, it only managed to heal the fatal wound(which she can do it with her medical ninjutsu enhanced by the seal) she received but Naruto's case is different, i dont know what kind of sorcery is this but i think medical ninjutsu is not capable of healing this.
Chiyo's life transfer jutsu is not medical jutsu, but part of puppetry ninjutsu, the caster exchanges his/her life with an individual who is in a near death position, or one who is near death. It's not about healing someone, as Chiyo mentioned when using the jutsu on Sakura she used medical jutsu to heal her first, then used the life transfer jutsu to give her life so that she would survive.
But as much as I want Sakura to be relevant --especially since the story is alluding specifically to the rescue Gaara arc-- I won't hold my breath. First of all, if there's anyone who would be capable of using Chiyo's jutsu it would be Kakashi as he was watching it go down with his Sharingan. Minato or Tsunade using Chiyo's technique wouldn't make sense --only Kakashi does, Sakura assuming she did some secret research, or maybe Kankurou since he's part of Suna puppet corps. Personally, IMO the golden scenario would be Gaara and Sakura working together to save/revive Naruto by using whatever method Kurama explained to Gaara. But again, I won't hold my breath for Sakura to even be allowed a reaction shot --for all we know she's currently off the battlefield. I'll just squeal over the fact that Gaara is given the opportunity to save Naruto, just as Naruto saved him by lending Chiyo his chakra.
Having said all that, I'm surprised that this hasn't been mentioned yet (or at least I haven't seen it), but right now with Kurama extracted from Naruto it's the perfect opportunity to have Naruto become the Jinchuriki of the Juubi and to give closure to the parallel with the RS.
Yep, but she said she healed a fatal wound, i mean Chiyo baa in terms of medical ninjutsu wasnt on the same level as Tsunade and Sakura are, but anyway, the jutsu as mentioned here
only managed to heal a fatal wound and Sakura can do this with her own medical ninjutsu, but the fact remains is that "is Naruto injured or wounded?" what kind of problem he has, i mean we dont even know what would probably cause Naruto to die.
I think the only thing i believe is that she wont use life transfer but rather other ninjutsu, that involves the seal.
It seems to me that what kills a Jinchuriki is extreme chakra exhaustion due to the stress they're put under when a biju is extracted --and as seen Sakura can heal someone whose chakra has been near depleted-- though, I still refuse to believe Sakura will be allowed to even react.