An intelligent pump apparatus for delivering fluid to a patient, the apparatus comprising: a fluid infusion pump device coupled to a fluid source, the fluid infusion pump configured to variably control a rate of flow of administration of intravenous fluid; a controller comprising a processing unit; a monitor to obtain a the physiological parameter from the patient, the monitor coupled to the controller; the controller communicatively coupled to the fluid infusion pump device, the controller having the processing unit configured to: receive, from the monitor an input information relating to an initial change in the physiological parameter of the patient in response to the administration of the first fluid bolus to the patient, the physiological parameter being predictive of fluid responsiveness; and determine based at least in part upon the input information a predicted change in a physiologic parameter being cardiac output of the patient in response to administration of a second fluid bolus to the patient; and providing a pump control signal to the fluid infusion pump device to adjust administration of fluid to the patient based upon the predicted change; characterized in that the controller is further configured to determine the predicted change based at least in part upon information relating to an expected change in the physiologic parameter in a patient population in response to infusion of a fluid bolus in patients included in the patient population; and wherein the controller is further configured to receive information relating to a medical condition of the patient and determine the patient population based at least in part upon the medical condition. a fluid infusion pump device coupled to a fluid source, the fluid infusion pump configured to variably control a rate of flow of administration of intravenous fluid; a controller comprising a processing unit; a monitor to obtain a the physiological parameter from the patient, the monitor coupled to the controller; the controller communicatively coupled to the fluid infusion pump device, the controller having the processing unit configured to: receive, from the monitor an input information relating to an initial change in the physiological parameter of the patient in response to the administration of the first fluid bolus to the patient, the physiological parameter being predictive of fluid responsiveness; and determine based at least in part upon the input information a predicted change in a physiologic parameter being cardiac output of the patient in response to administration of a second fluid bolus to the patient; and providing a pump control signal to the fluid infusion pump device to adjust administration of fluid to the patient based upon the predicted change; characterized in that the controller is further configured to determine the predicted change based at least in part upon information relating to an expected change in the physiologic parameter in a patient population in response to infusion of a fluid bolus in patients included in the patient population; and wherein the controller is further configured to receive information relating to a medical condition of the patient and determine the patient population based at least in part upon the medical condition. receive, from the monitor an input information relating to an initial change in the physiological parameter of the patient in response to the administration of the first fluid bolus to the patient, the physiological parameter being predictive of fluid responsiveness; and determine based at least in part upon the input information a predicted change in a physiologic parameter being cardiac output of the patient in response to administration of a second fluid bolus to the patient; and providing a pump control signal to the fluid infusion pump device to adjust administration of fluid to the patient based upon the predicted change; characterized in that the controller is further configured to determine the predicted change based at least in part upon information relating to an expected change in the physiologic parameter in a patient population in response to infusion of a fluid bolus in patients included in the patient population; and wherein the controller is further configured to receive information relating to a medical condition of the patient and determine the patient population based at least in part upon the medical condition.