Organs can now be made viable again with an application of mitocholide

code/modules/reagents/oldchem/reagents/reagents_med.dm

@@ -87,6 +87,11 @@
 	..()
 	return
 
+/datum/reagent/mitocholide/reaction_obj(var/obj/O, var/volume)
+	if(istype(O, /obj/item/organ))
+		var/obj/item/organ/Org = O
+		Org.rejuvenate()
+
 /datum/reagent/cryoxadone
 	name = "Cryoxadone"
 	id = "cryoxadone"

code/modules/surgery/organs/organ.dm

@@ -57,7 +57,7 @@ var/list/organ_cache = list()
 /obj/item/organ/proc/set_dna(var/datum/dna/new_dna)
 	if(new_dna)
 		dna = new_dna.Clone()
-		blood_DNA.Cut()
+		blood_DNA = list()
 		blood_DNA[dna.unique_enzymes] = dna.b_type
 
 /obj/item/organ/proc/die()
@@ -86,11 +86,11 @@ var/list/organ_cache = list()
 		return
 
 	if(!owner)
-		if(reagents && prob(40))
-			reagents.remove_any(0.1)
-			for(var/datum/reagent/R in reagents.reagent_list)
-				R.reaction_turf(get_turf(src), 0.1)
-
+		if(reagents)
+			var/datum/reagent/blood/B = locate(/datum/reagent/blood) in reagents.reagent_list
+			if(B && prob(40))
+				reagents.remove_reagent("blood",0.1)
+				blood_splatter(src,B,1)
 		// Maybe scale it down a bit, have it REALLY kick in once past the basic infection threshold
 		// Another mercy for surgeons preparing transplant organs
 		germ_level++
@@ -173,6 +173,9 @@ var/list/organ_cache = list()
 /obj/item/organ/proc/rejuvenate()
 	damage = 0
 	germ_level = 0
+	status &= ~ORGAN_DEAD
+	if(!owner)
+		processing_objects |= src
 
 /obj/item/organ/proc/is_damaged()
 	return damage > 0
@@ -268,8 +271,8 @@ var/list/organ_cache = list()
 	loc = get_turf(owner)
 	processing_objects |= src
 	var/datum/reagent/blood/organ_blood
-	if(reagents) organ_blood = reagents.get_reagent_from_id(owner.get_blood_name())
-	if((!organ_blood || !organ_blood.data["blood_DNA"]) && (owner && !(owner.species.flags & NO_BLOOD)))
+	if(reagents) organ_blood = locate(/datum/reagent/blood) in reagents.reagent_list
+	if(!organ_blood || !organ_blood.data["blood_DNA"])
 		owner.vessel.trans_to(src, 5, 1, 1)
 
 	if(owner && vital && is_primary_organ()) // I'd do another check for species or whatever so that you couldn't "kill" an IPC by removing a human head from them, but it doesn't matter since they'll come right back from the dead