blood choke

In this situation it is vital to distinguish between air and blood chokes.

Compared to strangulation with the hands, properly applied blood chokes require little physical strength.

Hadakajime - Air or Blood Choke?

Most chokeholds featured in combat sports and martial arts are blood chokes, although some air chokes or combinations occur as well.

In Judo terminology, "blood chokes" are referred to as "strangleholds" or "strangles" while "air chokes" are called "chokeholds" or "chokes".

Blood chokes can be applied to efficiently cause loss of consciousness, i.e. a choke-out, while air chokes do not usually cause loss of consciousness without prolonged application (though air chokes are used to cause discomfort).

Blood chokes, carotid restraint or sleeper holds, are a form of strangulation that compress one or both carotid arteries and/or the jugular veins without compressing the airway, hence causing cerebral ischemia and a temporary hypoxic condition in the brain.