Editing Kidney

{{infobox main|
| name = Kidney
| image = Health item natural.png|Kidney
| type = Medical Items
| type2 = Body Parts
| description = A biological human kidney. Filters and removes waste products from the blood.
| mass base = 1
| hp = 50
| flammability = 1.0
| marketvalue  = 900
| thingCategories = BodyPartsNatural
}}
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).

==Acquisition==
{{see also|Human resources#Organ harvesting{{!}}Human resources}}
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 unless the pawn is also [[Genes#Deathless|Deathless]].{{BiotechIcon}}

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:
: {{--|5}} for "Someone's organ harvested" (any organ); {{--|6}} if colonist harvested
: {{--|6}} for "Someone organ-murdered" (if fatal)
: {{--|5}} for "Witnessed ally's death" (if fatal and on colonist / guest)
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.

Kidneys can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.

== Summary ==
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.

[[Carcinoma]], one form of tumor cancer, weakens blood filtration. Kidneys can also be damaged from physical injuries or chemically damaged from [[drugs|psychite]] [[tolerance]].

=== Installation ===
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.

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.

If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.

==Analysis==
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. 

[[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.

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.

===Compared to detoxifier kidney===
[[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.

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.

===Trade===
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.

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.

== Version history ==
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
* ? (Possibly 1.4) - Market value increased from {{Icon small|silver||250}} [[silver]] to {{Icon small|silver||900}} [[silver]]. 

{{nav|body parts|wide}}
[[Category:Medical Item]] [[Category:Body Part]] [[Category:Organ]]