From Lexicanum

Autsanguination was a procedure that was performed by certain Techpriests of the Adeptus Mechanicus.

Overview

This action involves a Techpriest who exsanguinate themselves in order to replace their blood with a more effective medium. Typically, this is topped up from a portable alembic that is carried around externally. The sanguinous medium is then used to plug holes in the body and rebuild torn flesh with remarkable efficiency.

External Link

• Explorator Warband