Abstract: Medication Delivery System and Method Examples of the present application include an infusion device for controlling a medication delivery apparatus to deliver a pharmaceutical preparation to a patient, the infusion device comprising a processor and a memory storing instructions executable by the processor. The instructions include instructions to: determine, a number of infusion steps (h) that are to be performed within a time window, the time window comprising a first time window and a second time window, wherein a first number of infusion steps (h1) are to be performed within the first time window and a second number of infusion steps (h2) are to be performed within the second time window. To determine, for an infusion step of the first number of infusion steps (h1), a first infusion volume, using a cumulative delivery volume function. To determine, for an infusion step of the second number of infusion steps (h2), a second infusion volume, using a dose function.

Abstract: Examples of the present application disclose a medication delivery apparatus comprising a first plunger, a second plunger and a container configured to receive the second plunger and at least a portion of the first plunger. The container and the second plunger define a dilution chamber that is configured to receive a diluent. The container defines a dilution chamber opening. The first plunger, the container and the second plunger define an active agent chamber that is configured to receive a pharmaceutical preparation. The second plunger comprises a one-way valve configured to control a flow of pharmaceutical preparation from the active agent chamber to the dilution chamber. The one-way valve is configured to move from a closed position to an open position upon application of a force exceeding a valve threshold force to an inlet side of the valve. The valve threshold force is less than a sum of a break loose force of the second plunger and a break loose force of the first plunger.