diff --git a/code/game/objects/items/devices/defib.dm b/code/game/objects/items/devices/defib.dm
index 525bbeac7e..1e549c23c0 100644
--- a/code/game/objects/items/devices/defib.dm
+++ b/code/game/objects/items/devices/defib.dm
@@ -509,8 +509,8 @@
 		return // Still no brain.
 
 	// If the brain'd `defib_timer` var gets below this number, brain damage will happen at a linear rate.
-	// This is measures in `Life()` ticks. E.g. 10 minute defib timer = 300 `Life()` ticks.				// Original math was VERY off. Life() tick occurs every ~2 seconds, not every 2 world.time ticks.
-	var/brain_damage_timer = ((config.defib_timer MINUTES) / 20) - ((config.defib_braindamage_timer MINUTES) / 20)
+	// This is measures in `Life()` ticks. E.g. 10 minute defib timer = 6000 world.time units = 3000 `Life()` ticks.
+	var/brain_damage_timer = ((config.defib_timer MINUTES) / 2) - ((config.defib_braindamage_timer MINUTES) / 2)
 
 	if(brain.defib_timer > brain_damage_timer)
 		return // They got revived before brain damage got a chance to set in.
diff --git a/code/modules/organs/internal/brain.dm b/code/modules/organs/internal/brain.dm
index 386cfdaef5..30c539bbde 100644
--- a/code/modules/organs/internal/brain.dm
+++ b/code/modules/organs/internal/brain.dm
@@ -33,7 +33,7 @@ GLOBAL_LIST_BOILERPLATE(all_brain_organs, /obj/item/organ/internal/brain)
 	if(!owner || owner.stat == DEAD)
 		defib_timer = max(--defib_timer, 0)
 	else
-		defib_timer = min(++defib_timer, (config.defib_timer MINUTES) / 20)		// Time vars measure things in ticks. Life tick happens every ~2 seconds, therefore dividing by 20
+		defib_timer = min(++defib_timer, (config.defib_timer MINUTES) / 2)
 
 /obj/item/organ/internal/brain/proc/can_assist()
 	return can_assist
@@ -81,7 +81,7 @@ GLOBAL_LIST_BOILERPLATE(all_brain_organs, /obj/item/organ/internal/brain)
 /obj/item/organ/internal/brain/New()
 	..()
 	health = config.default_brain_health
-	defib_timer = (config.defib_timer MINUTES) / 20				// Time vars measure things in ticks. Life tick happens every ~2 seconds, therefore dividing by 20
+	defib_timer = (config.defib_timer MINUTES) / 2
 	spawn(5)
 		if(brainmob)
 			butcherable = FALSE
diff --git a/code/modules/surgery/additions_ch.dm b/code/modules/surgery/additions_ch.dm
index ecddfed994..b2c603a341 100644
--- a/code/modules/surgery/additions_ch.dm
+++ b/code/modules/surgery/additions_ch.dm
@@ -146,38 +146,4 @@
 	"<span class='danger'>Your hand slips, failing to finish the surgery, and damaging [target] with \the [tool].</span>")
 	affected.createwound(CUT, 15)
 	affected.createwound(BRUISE, 10)
-	..()
-
-/datum/surgery_step/internal/brain_revive
-	blood_level = 0
-	allowed_tools = list(/obj/item/weapon/surgical/bioregen=100)
-	min_duration = 120
-	max_duration = 150
-
-/datum/surgery_step/internal/brain_revive/can_use(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
-	var/obj/item/organ/internal/brain/brain = target.internal_organs_by_name[O_BRAIN]
-	return ..() && target_zone == BP_HEAD && istype(brain) && (brain.status & ORGAN_DEAD || brain.defib_timer == 0)
-
-/datum/surgery_step/internal/brain_revive/begin_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
-	user.visible_message("<span class='notice'>[user] begins to use \the [tool] to reverse the decay on and revatilize [target]'s brain.</span>", \
-		"<span class='notice'>You begin to use \the [tool] to reverse the decay on and revatilize [target]'s brain.</span>")
-	..()
-
-/datum/surgery_step/internal/brain_revive/end_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
-	user.visible_message("<span class='notice'>[user] finishes reversing the decay on and revatalizing [target]'s brain.</span>", \
-		"<span class='notice'>You finish reversing the decay on and revatalizing [target]'s brain.</span>")
-	var/obj/item/organ/internal/brain/brain = target.internal_organs_by_name[O_BRAIN]
-	brain.damage = max(0,brain.damage - 10)
-	brain.status &= ~ORGAN_DEAD
-	brain.handle_organ_mod_special()
-	brain.defib_timer = (config.defib_timer MINUTES) / 20
-	START_PROCESSING(SSobj, brain)
-	..()
-
-/datum/surgery_step/internal/brain_revive/fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
-	user.visible_message("<span class='danger'>[user]'s hand slips, failing to finish the surgery, and damaging [target] with \the [tool].</span>", \
-		"<span class='danger'>Your hand slips, failing to finish the surgery, and damaging [target] with \the [tool].</span>")
-	var/obj/item/organ/external/affected = target.get_organ(target_zone)
-	affected.createwound(CUT, 15)
-	affected.createwound(BRUISE, 10)
 	..()
\ No newline at end of file