It did look bad for him, I'll grant you that. I found a couple promos that only complicate the question of Quinlan's fate:
In this promo, at the 10 second mark, it looks like Quinlan's body is on an examination table:
https://youtu.be/KuWu89T5WIU
In this one, exactly at the 1:00 mark, you see a strigoi leaping through the air, only to have his throat slashed by what appears to be a perfectly healthy Quinlan. I don't remember this scene from any prior episode, so it looks like he actually survives:
https://youtu.be/wenmEoWKdiI
This is just a hunch based purely on my own opinion, but I don't understand why they would spend so much time on his back story only to kill him off in the same episode.
Then again, I know squat about writing for television.