초록 ▼

Equipment sets for the sequential administration of medical liquids wherein a primary liquid can be administered at a flow rate independent of the flow rate of a secondary liquid, and including a barrier substantially impervious to air to prevent the inadvertent administration of air when the second

Equipment sets for the sequential administration of medical liquids wherein a primary liquid can be administered at a flow rate independent of the flow rate of a secondary liquid, and including a barrier substantially impervious to air to prevent the inadvertent administration of air when the secondary liquid is depleted. The sets of this invention have a tube of reduced diameter to restrict the flow of primary liquid to a predetermined rate.

대표청구항 ▼

In a set for the sequential administration of medical liquids to a patient, said set including: a primary tube for the flow of a primary medical liquid therethrough and including a primary check valve for controlling the flow of liquid through said primary tube which preventing backflow of a liquid

In a set for the sequential administration of medical liquids to a patient, said set including: a primary tube for the flow of a primary medical liquid therethrough and including a primary check valve for controlling the flow of liquid through said primary tube which preventing backflow of a liquid therethrough, a secondary tube for the flow of a secondary medical liquid therethrough, a common tube having its distal end in fluid communication with the proximal ends of said primary and secondary tube and its proximal end open for the flow of liquid therefrom to form a primary liquid flow path comprising said primary tube and said common tube and a secondary liquid flow path comprising said secondary tube and said common tube, and a flow control means in said secondary liquid flow path for adjusting the flow rate of liquid therethrough, the improvement which comprises: primary flow control means on said primary liquid flow path comprising a first portion of said primary tube located on the distal side of said primary valve and having a constricted inner diameter for restricting the flow rate of said primary liquid through said primary flow path to a predetermined rate independent of the flow rate of said secondary liquid through said secondary liquid flow path, and an air barrier means within said secondary liquid flow path substantially impervious to air but permitting liquid flow therethrough while said set is in use and preventing the flow of air therethrough after said secondary liquid has been depleted.