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1. A disposable infusion device comprising:
a base arranged to adhere to a patient's skin; a cannula arranged to extend from the base to beneath the patient's skin to deliver a liquid medicament to the patient; and a source arranged to provide the cannula with a liquid medicament, the source including a pump that pumps the liquid medicament to the cannula, the pump comprising a compressible tube, wherein the source further comprises a tube compressor that compresses a length of the compressible tube to pump the liquid medicament to the cannula, wherein the tube compressor comprises a strap fixed to an end of the compressible tube and extending along the compressible tube, wherein the tube compressor further includes an actuator that pulls the strap against the compressible tube to compress the compressible tube, the device further including a volume adjuster that adjusts the volume of liquid medicament pumped to the cannula with each actuation of the actuator, and wherein the tube compressor further includes a disk having a circumferential surface that supports the compressible tube, wherein the actuator is arranged to pull the strap and compress the compressible tube against the disk circumference, wherein the volume adjuster comprises a groove within the circumferential surface of the disk, the groove having a depth that increases along the disk circumference, the groove being arranged to receive the compressible tube, and the disk being rotatable to vary the length of the groove receiving the compressible tube to adjust the volume of liquid medicament pumped to the cannula with each actuation of the actuator.
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