Dispensing fluid from an infusion pump system
First Claim
Patent Images
1. An infusion pump system for the delivery of medication, comprising:
- a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine,the pushrod including rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape,the pushrod including an anti-elongation mechanism disposed on at least a plurality of the pushrod segments to maintain the leading face of one pushrod segment in abutting relationship with a trailing face of an adjacent pushrod segment when a portion of the pushrod is adjusted to the generally noncurved shape.
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Abstract
Some embodiments of a medical infusion pump system include a pump device having a flexible pushrod that can adjust from a curved configuration to a generally straight configuration. The flexible pushrod is part of a drive system of the pump device so that the flexible pushrod can be controllably and incrementally advanced toward a medicine reservoir to incrementally dispense the medicine therein. In particular embodiments, the flexible pushrod may comprise an anti-rotation mechanism, an anti-torsion mechanism, or a combination thereof.
259 Citations
20 Claims
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1. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medicine for dispensation; and a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-elongation mechanism disposed on at least a plurality of the pushrod segments to maintain the leading face of one pushrod segment in abutting relationship with a trailing face of an adjacent pushrod segment when a portion of the pushrod is adjusted to the generally noncurved shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method delivering of medication from an infusion pump system, comprising:
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receiving a supply of medicine in an interior space of a pump housing; and activating a drive system to dispense at least a portion of the medicine through a tubular member away from the pump housing, the drive system including a pushrod that is urged toward the supply of the medicine to apply a dispensing force to dispense the medicine, wherein the pushrod includes rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod further including an anti-elongation mechanism disposed on at least a plurality of the pushrod segments to maintain the leading face of one pushrod segment in abutting relationship with a trailing face of an adjacent pushrod segment when a portion of the pushrod is adjusted to the generally noncurved shape. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification