Lung damage now occurs pressure-based, not oxyloss-based.

code/modules/mob/living/carbon/human/life.dm

@@ -489,7 +489,7 @@
 							domutcheck(src,null)
 							emote("gasp")
 						updatehealth()
-							
+
 				if(damage && organs.len)
 					var/datum/organ/external/O = pick(organs)
 					if(istype(O)) O.add_autopsy_data("Radiation Poisoning", damage)
@@ -499,6 +499,7 @@
 		if(istype(loc, /obj/machinery/atmospherics/unary/cryo_cell)) return
 
 		var/lung_ruptured = is_lung_ruptured()
+
 		if(lung_ruptured && prob(2))
 			spawn emote("me", 1, "coughs up blood!")
 			src.drip(10)
@@ -565,6 +566,12 @@
 					var/obj/location_as_object = loc
 					location_as_object.handle_internal_lifeform(src, 0)
 
+
+		if(!lung_ruptured && breath)
+			if(breath.total_moles < BREATH_VOLUME / 5 || breath.total_moles > BREATH_VOLUME * 5)
+				if(prob(5))
+					rupture_lung()
+
 		handle_breath(breath)
 
 		if(breath)
@@ -713,9 +720,6 @@
 					apply_damage(HEAT_GAS_DAMAGE_LEVEL_3, BURN, "head", used_weapon = "Excessive Heat")
 					fire_alert = max(fire_alert, 2)
 
-		if(oxyloss >= 50 && prob(oxyloss / 5))
-			rupture_lung()
-
 		//Temporary fixes to the alerts.
 
 		return 1