"Good," he says, and smiles his nasty smile again. "I want something to tie you up with. I suggest you help me find it."
Lalita does a very quick, very thorough job of making sure Kelvok will not be going much of anywhere or doing much of anything in the near future, and then he takes both disruptors and leaves. Back to the room where they were keeping Isabella, with a short detour through sickbay.
He does ask: "Can you move? Can you talk?"
"I can speak," she says with the kind of excess care that suggests that she runs the risk of worsening an injury in so doing. "Possibly I could roll onto my back. I cannot walk."
"You're not going to get much help from a Cardassian sickbay," he says, "and you know what the Prometheus is like on that score. But as usual, I've got a trick up my - lack of a sleeve." (He's still naked.) "My blood has restorative properties, and I happen to know it works on both your parent species, not that I have any idea how. If I give you some, it should help. Okay?"
It doesn't take very long to draw enough blood; it takes a little longer to get it into Isabella. Some amount of pain is unavoidable, with her injuries, but he tries to minimize it. (The long raw streak of a burn along his side is already healing, and it itches more than it hurts; he ignores both.)
Her face doesn't even twitch with discomfort.
"I have to straighten out your broken bones so they'll heal right," he says softly.
By the time he moves away, some of her bruises have already vanished. The burn in his side is long gone, without even leaving a scar.