Diameter-Index Safety System
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Related to Diameter-Index Safety System: American Standard Safety System
Diameter-Index Safety System (DISS)
a system of standardized connections between cylinders of medical gases and flowmeters or pressure regulators. Each gas has connections of a specific size to prevent accidental hookup of the wrong gas. Each type of gas and connector is assigned a DISS number, such as 1040 for nitrous oxide and 1240 for oxygen. See also Pin-Index Safety System.