Abstract: An anti-siphon control valve includes a housing fitted with a first port inflow, being in fluid communication with a first chamber; a second port outflow, being in fluid communication with a second chamber coaxial with the first chamber. A fluid flow path extends between the chambers. A resilient membrane is tensioned over the fluid flow path and over chamber so as to close the fluid flow path. The membrane has one face exposed to atmospheric pressure. The arrangement is such that when differential pressure across the membrane exceeds predetermined pressure threshold the membrane flexes and opens the fluid path allowing fluid flow between the first chamber and the second chamber. The scope of the invention will be pointed out in the appended claims.

Abstract: Methods and arrangements for administration of liquids to a patient by a medical pump from any size and type of syringe to a patient through a flexible tube are disclosed. Contemplated herein are methods and arrangements which permit a reduction in size of devices commonly encountered heretofore while administering liquids with high precision. While the arrangements of the present invention are of a size conducive to portability, the arrangements may also be mated with a docking station in a stationary configuration. Such a stationary configuration is preferably mounted on an IV pole.