Hemogen pack

Hemogen packs are a type of food added by the Biotech DLC. It acts as a form of blood that can be used for blood transfusions, or consumed those with the Hemogenic gene to restore their Hemogen need.

Acquisition

Hemogen packs can be extracted from non-hemogenic humans with the Extract Hemogen Pack operation. This takes 500 ticks (8.33 secs) of work and increases their blood loss by 45%; if blood loss exceeds 100%, then the pawn will die. Unlike most other operations, it does not consume medicine or anesthetise the subject. It does still provide Medical experience however.

This operation is considered a violation for faction relations, when done on a guest or ally. Extracting hemogen from a prisoner from a hostile faction lowers reputation by 1.

Prisoners can be designated to have extraction operations automatically queued up when their blood loss reaches 0% via the Hemogen farm interaction option.

Summary

Hemogen is a packaged form of blood that can be extracted and implanted to alter a human pawn's blood loss.

Any pawn can consume one for a measily 0.1 nutrition. Those without either a Hemogen need, the Cannibal trait, or a pro-Cannibalism ideoligion get a −5 Injested hemogen pack moodlet. This moodlet lasts 5 days and stacks up to 5 times. Consuming a pack in this way will not restore any blood loss

When consumed by Hemogenic pawns, each pack also satisfies the Hemogen need by +20. This is worth 2 days of blood for pawns with the Hemogen drain gene, including Sanguophages, and 10 days for those who just have Hemogenic.

Pawns will automatically consume hemogen packs to reach their target hemogen level if the toggle on their hemogen gizmo is enabled. See Hemogen for details.

Hemogen packs do not rot, only deteriorate by being left outdoors or in otherwise rough conditions.

Hemogen packs are also used in the construction and fueling of the following deathrest buildings:

Product	Ingredients	Type [ExpandCollapse]
Glucosoid pump	150 + 6 + 5	Building - Biotech (Buildings)
Hemogen amplifier	200 + 4 + 5	Building - Biotech (Buildings)
Hemopump	100 + 4 + 5	Building - Biotech (Buildings)
Psychofluid pump	50 + 100 + 6 + 5	Building - Biotech (Buildings)

Blood transfusion

Use hemogen packs to reduce the effects of blood loss. Each hemogen pack used recovers 35% blood loss. The operation will also restore hemogen to hemogenic individuals.
— Operation description

Hemogen packs can be used to perform the "blood transfusion" operation, which restores a pawn's blood loss. The operation consumes 1 hemogen pack, takes 800 ticks (13.33 secs) of work, and restores 35% blood loss. This surgery does not require medicine or a minimum Medical skill, does not anesthetise the subject, and always succeeds.

Note that the 35% blood loss recovered is less than the 45% lost from creating the pack in the first place.

Analysis

Hemogen packs are not made for emergency transfusion. By the time the pack is brought and installed, a doctor could have used 1-2 doses of medicine to stop most of the bleeding. In addition, tending can be done on the field, while operations must be done on a bed. Transfusions are mostly helpful to cure extreme blood loss, allowing pawns to become conscious faster.

Hemogen farms have a niche in increasing Medical experience. Make the operation as slow as possible, such as turning off the lights, to gain more XP. You may want to manually order operations instead of using the "Hemogen Farm" setting, so you can control which pawn is trained.

Compared to bloodfeeding, hemogen packs give the same Hemogen and blood loss, but do not upset pawns or cause pain. Hemogen packs do not vary in blood size, so give more blood when extracted from children.^{[this means that you extract the same amount of hemogen from an adult as from a child]} Extracting packs takes a bit more work, however. The Bloodfeeder gene costs −1 metabolic efficiency, but this isn't a choice with Sanguophages, only with a player-created xenotype. Also note that conceited noble pawns dislike hemogen packs, but don't mind bloodfeeding.

Extraction strategies

As:

A hemogen pack gives 20 hemogen
Extracting a hemogen pack causes 45% blood loss
Blood loss recovers at 33% per day

You can safely extract safely extract 1 pack every 1.36 days, or making 14.67 hemogen a day, capable of supporting 1.47 sanguophages pawns or 7.33 hemogenic pawns. Note that this is with optimum timing and therefore represents a theoretical maximum gain - actual extractions may not occur so promptly.

Prisoners make ideal sources of hemogen - the risk of death and statistical impact from blood loss is not important and the extraction can be completely automated. Long term prisoners can cause problems however. Pawns with the dead calm gene, such as genies, are ideal as they can feed and cloth themselves but will never harm other prisoners or attempt a prison break. Their mood becomes largely unimportant at that point, and they can be fed using a nutrient paste dispenser in their prison for maximum nutritional and colonist work efficiency. You may also choose to give them genes that improve their metabolic efficiency, to further cut costs.

If a dead calm pawn is not available, you can also remove a prisoners legs by installing and removing peg legs. They will need to be manually fed by a colonist but they can never escape.

Gallery

One pack
Partial stack
Full stack

Version history

Biotech DLC Release - Added
1.4.3530 - Added a toggle to the hemogen gizmo which allows configuration of whether or not a pawn can ingest hemogen packs to satisfy the desired hemogen level.
1.4.3541 - Extracting hemogen no longer requires medicine (previously: 2x herbal or better) and does not anesthetize the target. Medical experience also reduced.
1.4.3555 - Reduced the work needed for the extract hemogen operation to 500 from 1500. Fix: Bloodfeeders sometimes do not ingest all taken hemogen packs, depending on food need level. Added a toggle to the hemogen gizmo which allows configuration of whether or not a pawn can ingest hemogen packs to desired hemogen level - Note this is essentially a duplicate of the change from 1.4.3530, it is currently unclear whether this is an error, whether there is a difference, or whether the change was reverted and re-added latter.
1.4.3563 - Fix: Sanguophages can take too many hemogen packs for maintaining hemogen levels in some circumstances.
1.4.3580 - Fix: Hemogen packs give "ate vegetarian" mood.

Food

Meals: Chocolate • Fine meal (Carnivore, Vegetarian) • Kibble • Lavish meal (Carnivore, Vegetarian) • Nutrient paste meal • Packaged survival meal • Pemmican • Simple meal • Baby food
Raw food - Animal: Meat (Human, Insect, Twisted) • Insect jelly • Milk • Hemogen pack
Raw food - Eggs: Cassowary egg (fert.) • Chicken egg (fert., unfert.) • Cobra egg (fert.) • Duck egg (fert., unfert.) • Emu egg (fert.) • Goose egg (fert., unfert.) • Iguana egg (fert.) • Ostrich egg (fert.) • Tortoise egg (fert.) • Turkey egg (fert.)
Raw food - Vegetarian: Agave fruit • Berries • Corn • Hay • Potatoes • Raw fungus • Rice • Toxipotatoes