Bloodpack
The Bloodpack is a basic topical that restores 5% of the patients' blood and heals 0.5 bloodloss damage upon use. It is the only way to restore blood to a deceased crew member. As Saline is usually readily available in medical and easy to produce, it is generally preferred to utilize Saline over Bloodpacks when available.
Bloodpacks are mostly utilized outside of medical where Saline is not available. Under most circumstances it is better to wait until someone is alive and give them saline as low blood levels do not prevent revival. Bloodpacks are the only basic topical that cannot be made using the Medical techfab and cannot be crafted.
Since Bloodpacks work on deceased lifeforms, they can be especially useful to use on a chemical slime(snake?) or a zombie corpse as they can restore blood levels and allow more reagents to be harvested from the corpses. This can be incredibly powerful as a few stacks of blood packs can yield multiple jugs of Omnizine / Zombie Blood if applied to the respective corpses.
Acquisition
Found on stations
Can be found in medical supply lockers, in Medvends and as standard issue in medical belts.
Found in kits
Can be found in Advanced First Aid Kits which are standard issue on some station and may be ordered from cargo.