US 4,498,843 AGranted

Insulin infusion pump

OwnerPhilip H. Schneider, William J. Weber +1inventors

InventorsPhilip H. Schneider, William J. Weber, Thomas A. Massaro

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Abstract

There is disclosed a microprocessor-controlled peristaltic pump for use in a portable continuous insulin infusion device. The peristaltic pump is configured with a removable cover comprising a part of the pump housing surrounding a pump rotor, and holding a delivery tube between the cover and the rotor. The removable cover combines with a reservoir and the delivery tube to constitute a pre-filled disposable package facilitating installation and removal of the insulin in the device. A microprocessor controls the number of times the rotor turns during a cycle. This operation allows the microprocessor to automatically compensate for different diameter delivery tubes, as well as to allow the physician to vary the on/off time of the pump to administer different dosages.

Claims12

Dependent claims

A microprocessor controlled peristaltic pump comprising:

a pump having a rotatable pump rotor, and a pump switch means coupled to the pump rotor which alternately opens and closes as the pump rotor rotates;
a motor coupled to and driving the pump rotor;
a reservoir having a cylinder, and a piston which moves into the cylinder as the reservoir is depleted;
a delivery tube connecting the reservoir to the pump, running through the pump, over the rotor, and thence to a delivery site;
a reservoir switch means coupled to the piston which alternately opens and closes as the reservoir is depleted;
and
a microprocessor electrically connected to the pump switch means, the reservoir switch means, and the motor such that the microprocessor programmably controls the number of revolutions the pump rotor makes per unit of time in response to signals received from the pump switch and the reservoir switch.

4 more elements

Dependencies are inferred from the claim text.