| 摘要 |
A system for the preparation of parenteral nutrient solutions from two or more substrates such as amino acids and carbohydrates in a virtually aseptic environment. A closed system is formed with the substrate supply containers, incorporating conduit extending from each supply container and connected to the inlet of a multiple transfer valve, a dosing syringe secured to the inlet/outlet connection of the transfer valve and a flexible mixing container secured to the outlet of the transfer valve. Each conduit includes a tube clamp such that each conduit is individually communicable with the transfer valve. With the suction stroke of the syringe plunger, fluid is drawn from one of the supply containers into the syringe. As the solution is ejected from the syringe it exits the outlet of the transfer valve and enters the mixing container. After a predetermined amount of the first substrate is added to the mixing container in this manner the tube clamp for the corresponding conduit is closed and the tube clamp on conduit extending to a second substrate supply container is opened, whereupon the process is repeated until the proper ratio of the substrates in the mixing container is achieved.
|
