The Southmedic MDI Adaptor is an Adult Metered Dose Inhaler (MDI) Adaptor for use with the new MDI with dose counters as well as traditional MDI canisters. The SMDIA-1000 can remain in line with the breathing circuit as directed by physician and/or hospital protocol. It is compatible with both plastic and metal canister stems. Arrows clearly mark the direction of flow. It is equipped with a tethered plug to seal the breathing circuit when no MDI canister is in place.