diff --git a/addons/medical_ai/functions/fnc_healingLogic.sqf b/addons/medical_ai/functions/fnc_healingLogic.sqf
index f3942ef632..6d10fc5e3b 100644
--- a/addons/medical_ai/functions/fnc_healingLogic.sqf
+++ b/addons/medical_ai/functions/fnc_healingLogic.sqf
@@ -70,7 +70,7 @@ switch (true) do {
         _treatmentArgs = [_healer, _target];
         _treatmentTime = 15;
     };
-    case (_isMedic && {GET_BLOOD_VOLUME(_target) < BLOOD_VOLUME_CLASS_2_HEMORRHAGE}
+    case (_isMedic && {GET_BLOOD_VOLUME(_target) < MINIMUM_BLOOD_FOR_STABLE_VITALS}
     && {([_healer, "@iv"] call FUNC(itemCheck)) # 0}): {
         // Check if patient's blood volume + remaining IV volume is enough to allow the patient to wake up
         private _totalIvVolume = 0; //in ml
@@ -79,7 +79,7 @@ switch (true) do {
             _totalIvVolume = _totalIvVolume + _volumeRemaining;
         } forEach (_target getVariable [QEGVAR(medical,ivBags), []]);
 
-        if (GET_BLOOD_VOLUME(_target) + (_totalIvVolume / 1000) > BLOOD_VOLUME_CLASS_2_HEMORRHAGE) exitWith {
+        if (GET_BLOOD_VOLUME(_target) + (_totalIvVolume / 1000) > MINIMUM_BLOOD_FOR_STABLE_VITALS) exitWith {
             _treatmentEvent = "#waitForBlood";
         };
         _treatmentEvent = QEGVAR(medical_treatment,ivBagLocal);
diff --git a/addons/medical_engine/XEH_preInit.sqf b/addons/medical_engine/XEH_preInit.sqf
index da2ab02141..379b30da4b 100644
--- a/addons/medical_engine/XEH_preInit.sqf
+++ b/addons/medical_engine/XEH_preInit.sqf
@@ -9,6 +9,8 @@ PREP_RECOMPILE_END;
 #include "initSettings.sqf"
 
 // Define "Constants" variables (both are macros defined in script_macros_medical.hpp, look there for actual variable names)
+if (isNil QUOTE(SPONTANEOUS_WAKE_UP_INTERVAL)) then {SPONTANEOUS_WAKE_UP_INTERVAL = SPONTANEOUS_WAKE_UP_INTERVAL_DEFAULT};
+if (isNil QUOTE(MINIMUM_BLOOD_FOR_STABLE_VITALS)) then {MINIMUM_BLOOD_FOR_STABLE_VITALS = MINIMUM_BLOOD_FOR_STABLE_VITALS_DEFAULT};
 if (isNil QUOTE(HEAD_DAMAGE_THRESHOLD)) then {HEAD_DAMAGE_THRESHOLD = HEAD_DAMAGE_THRESHOLD_DEFAULT};
 if (isNil QUOTE(ORGAN_DAMAGE_THRESHOLD)) then {ORGAN_DAMAGE_THRESHOLD = ORGAN_DAMAGE_THRESHOLD_DEFAULT};
 if (isNil QUOTE(HEART_HIT_CHANCE)) then {HEART_HIT_CHANCE = HEART_HIT_CHANCE_DEFAULT};
diff --git a/addons/medical_engine/script_macros_medical.hpp b/addons/medical_engine/script_macros_medical.hpp
index 2924d83b13..1f1f2c5aba 100644
--- a/addons/medical_engine/script_macros_medical.hpp
+++ b/addons/medical_engine/script_macros_medical.hpp
@@ -54,6 +54,10 @@
 #define BLOOD_VOLUME_CLASS_4_HEMORRHAGE 3.600 // lost more than 40% blood, Class IV Hemorrhage
 #define BLOOD_VOLUME_FATAL 3.0 // Lost more than 50% blood, Unrecoverable
 
+// Minimum blood volume, in liters, for a patient to have the chance to wake up
+#define MINIMUM_BLOOD_FOR_STABLE_VITALS EGVAR(medical,const_stableVitalsBloodThreshold)
+#define MINIMUM_BLOOD_FOR_STABLE_VITALS_DEFAULT BLOOD_VOLUME_CLASS_2_HEMORRHAGE
+
 // IV Change per second calculation:
 // 250 ml should take 60 seconds to fill. 250 ml / 60 s ~ 4.1667 ml/s.
 #define IV_CHANGE_PER_SECOND 4.1667 // in milliliters per second
@@ -72,7 +76,7 @@
 #define DAMAGE_BLUE_THRESHOLD 0.8
 #define DAMAGE_TOTAL_COLORS 10
 
-// --- pain
+// Pain above which a unit can go unconscious upon receiving damage
 #define PAIN_UNCONSCIOUS EGVAR(medical,painUnconsciousThreshold)
 
 // Pain fade out time (time it takes until pain is guaranteed to be completly gone)
@@ -84,7 +88,8 @@
 #define PAIN_SUPPRESSION_FADE_TIME 1800
 
 // Chance to wake up when vitals are stable (checked once every SPONTANEOUS_WAKE_UP_INTERVAL seconds)
-#define SPONTANEOUS_WAKE_UP_INTERVAL 15
+#define SPONTANEOUS_WAKE_UP_INTERVAL EGVAR(medical,const_wakeUpCheckInterval)
+#define SPONTANEOUS_WAKE_UP_INTERVAL_DEFAULT 15
 
 // Minimum leg damage required for limping
 #define LIMPING_DAMAGE_THRESHOLD EGVAR(medical,const_limpingDamageThreshold)
diff --git a/addons/medical_status/functions/fnc_hasStableVitals.sqf b/addons/medical_status/functions/fnc_hasStableVitals.sqf
index 90e2caac93..1c98b89e74 100644
--- a/addons/medical_status/functions/fnc_hasStableVitals.sqf
+++ b/addons/medical_status/functions/fnc_hasStableVitals.sqf
@@ -17,7 +17,7 @@
 
 params ["_unit"];
 
-if (GET_BLOOD_VOLUME(_unit) < BLOOD_VOLUME_CLASS_2_HEMORRHAGE) exitWith { false };
+if (GET_BLOOD_VOLUME(_unit) < MINIMUM_BLOOD_FOR_STABLE_VITALS) exitWith { false };
 if IN_CRDC_ARRST(_unit) exitWith { false };
 
 private _cardiacOutput = [_unit] call FUNC(getCardiacOutput);