If one uses the thumb and forefingers of both hands placed over the carotid triangle and squeezing, fainting can occur. However, when one’s hands are released (as will happen with fainting) there will be an immediate return of consciousness. In order for death to occur, the pressure needs be applied (preferably quickly) and maintained.
With a pneumatic device (the BP manometer), the pads can be positioned over the previously marked ‘L’ and ‘R’ locations on the neck. The velcro band is then firmly wrapped around the neck. A second velcro band can be added to ensure there is no dislodgement. The positioning is firm, but comfortable.
To bring about death, quickly pump-up the pads until the manometer pressure gauge reads ~ 150 mm/Hg. Dizziness, visual distortion and loss of consciousness will occur. If the pressure is released (before loss of consciousness) normal function will quickly return (with no ill effect).
If a person breathes rapidly and deeply for several minutes before applying baroreceptor pressure, this can serve to significantly accentuate the reduction in cerebral oxygen supply. This is because hyperventilation lowers the level of carbon dioxide in the blood which, in turn, results in a constriction of the blood vessels in the brain, limiting the availability of oxygen.