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| hp = 50
 
| hp = 50
 
| flammability = 1.0
 
| flammability = 1.0
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| marketvalue  = 900
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| marketvalue  = 250
 
| thingCategories = BodyPartsNatural
 
| thingCategories = BodyPartsNatural
 
}}
 
}}
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The kidneys are two bean-shaped organs found on the left and right sides of the body. They filter the blood in order to make urine, to release and retain water, and to remove waste and nitrogen (the excretory system).
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The kidneys are two bean-shaped organs found on the left and right sides of the body. They filter the blood in order to make urine, to release and retain water, and to remove waste and nitrogen (the excretory system). Each kidney accounts for 50% of a person's [[blood filtration]]. It is possible to survive with only one. Carcinoma, one form of tumor cancer, weakens blood filtration.
  
 
==Acquisition==
 
==Acquisition==
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{{see also|Human resources#Organ harvesting{{!}}Human resources}}
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{{see also|Human resources}}
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The kidney item can be harvested from live [[human]]s through [[surgery]]. The kidney must be perfectly healthy in order to obtain the item. This bill requires 1 of any type of medicine to perform. [[Doctoring#Success_chance|Success chance]] is dependent on a number of factors, including bed [[quality]], [[Room stats|room cleanliness]], and doctor skill - specifically the doctor's [[Medical Surgery Success Chance]]. Kidneys can be directly harvested, but installing a [[detoxifier kidney]] {{BiotechIcon}} will also net an organic kidney. Removing both kidneys will kill the pawn.
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While most [[animals]] have kidneys, the kidney item can only be acquired by harvesting them from [[human]] [[pawns]] through the [[surgery]] bill. This bill requires 1 of any type of medicine to perform. [[Doctoring#Success_chance|Success chance]] is dependent on a number of factors, including bed [[quality]], [[Room stats|room cleanliness]], and doctor skill - specifically the doctor's [[Medical Surgery Success Chance]].  
  
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Removing a kidney from a guest or prisoner will decrease faction [[goodwill]] by 80 points, down to the cap of -100. Removing any organ from anyone depresses the "donor" with -30 [[mood]] penalty for 7 days and 7 hours. Other colony members can give potentially tremendous [[mood]] penalties, which all stack:
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Up to two kidneys can be taken from a healthy patient but any damage, infection, carcinoma or other issue affecting a kidney will prevent harvesting. If both kidneys are taken, the patient will die.
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: {{--|5}} for "Someone's organ harvested" (any organ); {{--|6}} if colonist harvested
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: {{--|6}} for "Someone organ-murdered" (if fatal)
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Removing a kidney from a guest or prisoner decreases [[faction]] goodwill by 20 points down to a max of -100, and creates a -5 [[mood]] to your pawns for 8 days due to "someone's organ harvested", stacking up to 5 times, with a 0.75x multiplier. Surgery on your own people gives "colonist's organ harvested" which is statistically identical to the previous mood penalty, however both types of mood penalties stack. The original owner of the organ receives a -30 mood penalty for 8 days. Lastly if the pawn is killed by taking the organ, the members of the colony gets an additional a -6 for 5 days.
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: {{--|5}} for "Witnessed ally's death" (if fatal and on colonist / guest)
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Pawns with the [[Bloodlust]] or [[Psychopath]] traits, or those with an [[Ideoligion]] with [[Ideoligion#Organ use|Organ Use: Acceptable]]{{IdeologyIcon}} are not affected by the harvesting of other people. Other Ideologion precepts may change moodlets for harvest and organ use.
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Pawns with the Bloodlust and Psychopath [[trait]] are not affected by the harvesting of other people.
  
 
Kidneys can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.
 
Kidneys can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.
  
 
== Summary ==
 
== Summary ==
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A human requires 1 kidney to live. Each kidney accounts for 50% of a person's [[Blood Filtration]]. Blood Filtration itself affects [[Consciousness]] and [[Immunity Gain Speed]]; a completely removed kidney reduces Consciousness by 5% and Immunity Gain Speed by 25%. The Consciousness penalty reduces a variety of pawn capabilities.
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{{stub|section=1}}
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Summary stuff goes here
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[[Carcinoma]], one form of tumor cancer, weakens blood filtration. Kidneys can also be damaged from physical injuries or chemically damaged from [[drugs|psychite]] [[tolerance]].
 
  
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=== Installation ===
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===Installation===
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Installing the part requires {{ticks|2500}} of work, 2x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 5.
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{{stub|section=1}}
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Installing the part requires {{ticks|2500}} of work, ?x medicine of ?? quality or better, and a [[Skills#Medical|Medical skill]] of 5.
  
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Removing the part requires {{ticks|2000}} of work, 1x medicine of [[Herbal medicine|herbal]] quality or better, and has no [[Skills#Medical|Medical skill]] requirements.
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Removing the part requires ? of work, ?x medicine of ?? quality or better, and a [[Skills#Medical|Medical skill]] of ?.
  
 
If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.
 
If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.
  
 
==Analysis==
 
==Analysis==
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Immunity Gain Speed is helpful to survive [[infection]]s and other diseases; if it is 58% or lower, such as from two damaged kidneys, then even the [[Flu]] will be invariably fatal. Thus, it is recommended to replace damaged, destroyed or missing kidneys on valuable colonists as soon as possible.  
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While kidneys can be harvested from prisoners, guests and your own colonists, generally it is preferable to harvest from prisoners that you don't intend to recruit or sell into slavery. Their faction is generally already hostile, their mood is not as important as a colonists and the significant loss in [[Blood Filtration]] is less important. It is also recommended to pick either colonist harvesting or prisoner/guest harvesting as they two debuffs stack and only the like debuffs have the stack multiplier i.e. harvesting one colonist and one prisoner will have a larger net debuff than harvesting from two colonists or two prisoners.
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There are two primary reasons to harvest an organ - trade and transplantation.
  
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[[Immunoenhancer]]s{{RoyaltyIcon}} can be implanted into pawns with natural kidneys. Each immunoenhancer will grant {{+|8%}} [[immunity gain speed]] to a pawn, which helps recovery from disease.
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===Transplantation===
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Kidneys can be damaged by disease, drugs, or combat. The damage to a single kidney reduces Blood Filtration by up to 50%. This has two primary effects - the first is a 5% reduction in [[Consciousness]] which in turn affects almost every task a pawn can perform - making them slightly worse in basically every way.
  
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Harvesting from your own pawns is not recommended, so take from your prisoners or guests. For most pawns, the mood penalty of organ harvest is worth replacing the organ, but this may not apply to more disposable pawns.
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The second, perhaps more urgent, effect is a 25% reduction in [[Immunity Gain Speed]]. This significantly reduces the survivability of infections and common diseases such as the [[Flu]]. If a pawn has an immunity gain speed of 58% or lower, such as from two damaged kidneys, or a damaged kidney and [[Liver]], then the flu will be invariably fatal.  
  
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===Compared to detoxifier kidney===
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Lastly, while unlikely, if the remaining kidney is destroyed the pawn will instantly die.  
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[[Detoxifier kidney]]s{{BiotechIcon}} are a kidney replacement which can be crafted at a Fabrication bench once the [[Research#Toxin_filtration|Toxin filtration]] research project has been completed. Each detoxifier kidney requires {{Required Resources|detoxifier kidney}}. Installing a detoxifier kidney replaces the pawn's natural kidney. If the kidney is in perfect condition, it is harvested from the pawn with no negative consequences. Immunoenhancers{{RoyaltyIcon}}cannot be installed in a detoxifier kidney.
 
  
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Detoxifier kidneys have a part efficiency of {{good|110%}}, grant {{+|50%}} [[toxic resistance]],  and are immune to [[chemical damage]] from drugs. Each detoxifier kidney increases [[blood filtration]] by {{+|5%}}, which in turn increases [[immunity gain speed]] by {{+|2.5%}}. Toxic resistance from detoxifier kidneys will stack to a maximum of {{+|100%}} with 2 installed parts.
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Thus, it is recommended to replace damaged, destroyed or missing kidneys on valuable colonists as soon as possible. For most pawns. the mood penalty is worth replacing the organ but this may not apply to more disposable pawns.
  
 
===Trade===
 
===Trade===
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Each kidney is worth {{icon Small|silver||{{Q|Kidney|Market Value Base}}}} silver. While lungs are worth more than kidneys, you can harvest both a kidney and a lung without killing a pawn. If the mood penalties don't concern you (or don't exist due to [[Ideoligion]]{{IdeologyIcon}}), you can harvest 1 kidney, 1 lung, and 1 heart/liver before a pawn dies. This can extract a lot of value, almost certainly more than selling the pawn to a slaver.
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Each kidney is worth 250 silver, and only has a mass of 1. The abundant supply of [[raiders]] means that, if the mood penalty can be withstood, a significant amount of value can be extracted from them without having to keep prisoners and wait for a Slave Trader or Royal Tribute Collector {{RoyaltyIcon}}.
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The [[Heart]], [[Lung]]s, and [[Liver]] are also options for harvesting. If willing to organ-murder the donor, the optimum is removing:
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* 1x Lung worth {{icon|silver|{{Q|Lung|Market Value Base}}}}
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* 1x Kidney worth {{icon|silver|{{Q|Kidney|Market Value Base}}}}
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* 1x Heart worth {{icon|silver|{{Q|Heart|Market Value Base}}}}
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For a total of {{icon|silver|{{#expr:{{Q|Heart|Market Value Base}} + {{Q|Kidney|Market Value Base}} + {{Q|Lung|Market Value Base}}}}}}.
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If the Heart is damaged, the liver can also be supplemented for the same value. If that is also unavailable, the second lung and then the second kidney are the optimal options.
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Removing the heart, liver, second lung or second kidney are all fatal and prevent further harvesting.  
  
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You can also harvest a kidney and lung, then donate the prisoner to a [[royal tribute collector]]{{RoyaltyIcon}} for the same amount of [[honor]] as a healthy pawn.
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If unwilling to organ murder the donor, the best option is harvesting the
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* 1x Lung worth {{icon|silver|{{Q|Lung|Market Value Base}}}}
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* 1x Kidney worth {{icon|silver|{{Q|Kidney|Market Value Base}}}}
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For a total of {{icon|silver|{{#expr:{{Q|Kidney|Market Value Base}} + {{Q|Lung|Market Value Base}}}}}}.
  
 
== Version history ==
 
== Version history ==
 
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
 
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
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* ? (Possibly 1.4) - Market value increased from {{Icon small|silver||250}} [[silver]] to {{Icon small|silver||900}} [[silver]].
 
  
 
{{nav|body parts|wide}}
 
{{nav|body parts|wide}}
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[[Category:Medical Item]] [[Category:Body Part]] [[Category:Organ]]
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[[Category: Medical Item]]
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[[Category: Body Part]]

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