High accuracy clamp assembly

A clamp assembly including:

• a housing configured to couple to an infusion set, the housing comprising:
• two opposing side walls spaced apart from each other, each side wall having an opposing guide groove longitudinally positioned in an interior surface;
• a guide wall disposed between the side walls;
• an elastomeric segment disposed between the two opposing side walls, the guide wall and each end of the housing, the elastomeric segment being a hollow tube and having a lower compression set performance than the compression set performance of first and second intravenous (IV) tubes of the infusion set;
• a first tubing port disposed on a first end of the elastomeric segment and configured to couple with the first IV tube of the infusion set;
• and
• a second tubing port disposed on a second end of the elastomeric segment and configured to couple with the second IV tube of the infusion set;
• and
• a flow regulating member having portions disposed in the guide grooves, the flow regulating member configured to move along a longitudinal axis of the housing over a movement range as the portions slide in the guide grooves,
• wherein the flow regulating member is configured to remain in a set position during use of the infusion set based on the compression set performance of the elastomeric segment until the flow regulating member is moved by a user.