The Ohio quick-connect system, like the DISS, is a gas station outlet system used in the hospital setting for the supply of medical gases. Ohio quick-connectors have a unique arrangement of a two-pin and groove connection for each type of gas to prevent erroneous connection. Disconnection is by twisting a ring around the male connector which operates a spring-release mechanism. The system also contains a valve at the outlet/ wall supply side which shuts off gas supply upon disconnection.
Like the DISS connectors, the Ohio quick-connect system is color-coded for the medical gas supplied.
Ohio quick-connect female connectors showing the different two-pin arrangements for various medical gases and vacuum.
In the UK the pin index safety system is used. The underlying principle is the same.