| 摘要 |
A variable volume bottle (12), and related system are provided for infusing a selected medical fluid (14) to a patient. The variable volume bottle comprises a relatively rigid bottle body (30) having a lower neck (32) adapted for connection to an infusion line by a cap fitting (42) having a slotted nipple (46) for controlled flow of the medical fluid from the bottle, and through the infusion line to the patient. The bottle body further includes a movable upper wall (38) which descends as the fluid is delivered to the patient, and a flow sensor unit (20) tracks displacement of the movable upper wall to provide an indication of the dispensed fluid volume. A flow rate controller (18) may be provided for constricting the slotted nipple to variably adjust the open area defined by the slot therein, and thereby variably select the rate of fluid flow to the patient. In an alternative embodiment, the cap fitting may comprise a pair of inter-fitting cap members having a pair of overlapping flow ports formed therein, wherein the cap members are movably positioned with respect to each other to adjust the open area of an outlet passage defined by the flow ports, and thereby variably select the rate of fluid flow to the patient.
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