Suicide/Carbon monoxide poisoning

From Wikibooks, open books for an open world
Jump to navigation Jump to search
Carbon monoxide poisoning
Suicide method ratings
Reliability (10) 8
Peacefulness (10) 7
Availability (5) 3
Preparation and administration (5) 1
Undetectability (5) 1
Speed of effect (5) 5
Safety to others (5) 1
Storage (5)  4
Total score (50) 30

The use of carbon monoxide poisoning for a suicide method is known as the Hibachi method in holiday and ASM these days. Jack Kevorkian used a cylinder of compressed carbon monoxide (9% CO in Nitrogen) to help people end their lives. A few deep breaths of the carbon monoxide-nitrogen mixture made the person lose consciousness and die quickly. To ensure a high enough monoxide concentration, a meter capable of reading monoxide concentration levels can be used to test the gas concentration. A TPI model 770 gauge costs ~$200. Cylinders of compressed carbon monoxide are available from scientific gas supply companies. Older cars (i.e. cars built before 1997, and especially those without catalytic converters) tend to produce the highest levels of exhaust carbon monoxide.

There are a number of ways in which the use of car exhaust can fail to work as a suicide method. Metal connections and clamps and heat resistant tubing need to be used, since plastic tape and regular tubing can be melted by the hot exhaust gas. A test should be conducted, using a CO meter, to verify that the concentration quickly exceeds 500ppm. For best results, a car with a catalytic converter should be started cold and allowed to idle, since catalytic converters do not function when cold. A car with an exhaust hose fed into the window will also tend to attract attention, so it is important to keep the car out of sight of potential meddlers during this process.

A failed carbon monoxide poisoning suicide attempt can cause health problems, including brain, heart, endocrine and cellular damage.[1]


There are two detailed FAQs available for this method, which are listed below.

  • Hibachi FAQ 1, written by signal11fault.[2]
  • Hibachi FAQ 2, written by Aficoman.[3]