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Jerkmate
https://patents.google.com/patent/US5188738
US5188738A - Alternating current supplied electrically conductive method and system for treatment...
A new alternating current process and system for treatment of blood and/or other body fluids and/or synthetic fluids from a donor to a recipient or storage...
alternating currentelectrically conductivesuppliedmethodsystem
https://www.electronicsforu.com/technology-trends/learn-electronics/difference-between-ac-and-dc
Explained Alternating Current (AC) and Direct Current (DC)
Feb 24, 2026 - Ac current changes its direction during flow, while DC current does not change its direction during flow and remains constant.
alternating currentexplainedacdirectdc
https://xkcd.com/2642/
xkcd: Meta-Alternating Current
alternating currentxkcdmeta