Dispensing Fluid from an Infusion Pump System
First Claim
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1. A medical infusion pump system, comprising:
- a pump device including;
a pump housing that defines a space to receive a medicine cartridge, a cap device to secure with the pump housing to enclose the medicine cartridge in the pump housing when the medicine cartridge is received in the space the of the pump housing, and a pump drive system to dispense medicine from out of the pump device, the pump drive system including;
a piston rod to advance toward the medicine cartridge and force the medicine from the pump device;
a mechanism to advance the piston rod toward the medicine cartridge, the mechanism comprising a pawl and a ratchet member, the pawl positioned to engage one or more teeth of the ratchet member, wherein the pawl is adjustable between a first position and a second position to move the ratchet member in a forward direction so as to cause the piston rod to advance toward the medicine cartridge; and
a battery-powered motor having an output that rotates one or more full rotations to cause the pawl to adjust toward one of the first position or the second position; and
a removable controller device that is removably attachable to the pump device so that a mechanical connection and an electrical connection is formed between the pump device and the controller device, the controller device including;
control circuitry that communicates electrical signals to the pump drive system via the electrical connection, and a user interface display.
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Abstract
Some embodiments of an infusion pump device may include a drive system that accurately and incrementally dispenses fluid from the pump device in a controlled manner. Particular embodiments of the drive system may include a rotational motor that is coupled to a string member, which is used to adjust a pawl relative to a ratchet body. In such circumstances, the drive system can provide a reliable and compact infusion pump device that accurately dispenses the desired volume of fluid.
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Citations
16 Claims
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1. A medical infusion pump system, comprising:
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a pump device including;
a pump housing that defines a space to receive a medicine cartridge, a cap device to secure with the pump housing to enclose the medicine cartridge in the pump housing when the medicine cartridge is received in the space the of the pump housing, and a pump drive system to dispense medicine from out of the pump device, the pump drive system including;a piston rod to advance toward the medicine cartridge and force the medicine from the pump device; a mechanism to advance the piston rod toward the medicine cartridge, the mechanism comprising a pawl and a ratchet member, the pawl positioned to engage one or more teeth of the ratchet member, wherein the pawl is adjustable between a first position and a second position to move the ratchet member in a forward direction so as to cause the piston rod to advance toward the medicine cartridge; and a battery-powered motor having an output that rotates one or more full rotations to cause the pawl to adjust toward one of the first position or the second position; and a removable controller device that is removably attachable to the pump device so that a mechanical connection and an electrical connection is formed between the pump device and the controller device, the controller device including;
control circuitry that communicates electrical signals to the pump drive system via the electrical connection, and a user interface display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling a medical infusion pump system, comprising:
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receiving via a user interface of a controller device user input related to dispensing medicine, the controller device being removably attachable to a pump device to form a mechanical connection and an electrical connection between the pump device and the controller device; activating a battery-powered motor of a pump drive system housed inside the pump device to rotate one or more full rotations in response to one or more electrical signals communicated from the controller device via the electrical connection, the pump drive system further comprising;
a piston rod, and a mechanism to advance the piston rod toward the medicine housed in the pump device, the mechanism comprising a pawl and a ratchet member, the pawl positioned to engage one or more teeth of the ratchet member, wherein the pawl is adjustable between a first position and a second position to move the ratchet member in a forward direction so as to cause the piston rod to advance toward the medicine, wherein the one or more full rotations of the battery-powered motor cause the pawl to adjust toward one of the first position or the second position; andadvancing the piston rod to dispense a portion of the medicine from the pump device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification