Tubex unit

Tubex unit,

trademark for a unit consisting of a cartridge with an attached needle that screws onto a plunger. The cartridge may be empty or prefilled with a standard dose of a medication. As the plunger is depressed, forcing the diaphragm into the cartridge, medication is forced out through the needle. The cartridge needle unit is disposable. The plunger requires no special care and is reusable.