Infusion device
First Claim
1. An infusion device adapted for coupling to a syringe having an elongated tubular wall extending along a tube axis with a fluid dispensing outlet port at one end and having an internal plunger adapted for motion along said tube axis, comprising:
- A. means for supporting said syringe wall whereby said tube axis is substantially parallel to a reference axis associated with said device,B. means for selectively driving said plunger over a predetermined range of motion along said tube axis, including;
i. driver member for engaging said plunger,ii. stepper motor having an output shaft, said motor being responsive to an applied pulse to rotate said shaft a predetermined angular increment in a first direction,iii. coupling means for coupling said output shaft to said driver member whereby said driver member translates a predetermined linear increment along said reference axis in response to each of said incremental rotations of said shaft, andiv. control means including a battery power supply and an associated electrical circuit means operative in a pump mode for generating a succession of said pulses, and for applying said succession of pulses to said motor, said circuit means being characterized by relatively high current drain from said power supply during said pulses and relatively low current drain from said power supply between said pulses, wherein said coupling means includes;
i. a first roller and second roller,ii. an endless belt disposed about said first and second rollers,iii. motor coupler means for coupling rotory motion of said output shaft to said first roller, whereby said first roller rotates a predetermined angular increment and said belt translates a predetermined linear increment in response to each of said incremental rotations of said shaft,iv. drive coupling means for selectively coupling said belt to said driver member.
9 Assignments
0 Petitions
Accused Products
Abstract
An infusion device for a syringe includes a ratcheted stepper motor driven intermittently under the control of a control circuit to advance a syringe plunger driver. Different speeds are determined by the detected size of the syringe in the device. A clutch assembly disengageably connects the plunger driver to a drive belt driven by the stepper motor.
A connector for a tubing set has a syringe-connect portion located in a recess of the connector, and cooperates with a force sensor in the device to detect occlusions. The connector has annular projecting portions with parallel, spaced apart actuating surfaces for engagement of the force sensor in either of two positions of the connector in the device. The connector is adapted to indicate to a sensor in which position it is located.
262 Citations
17 Claims
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1. An infusion device adapted for coupling to a syringe having an elongated tubular wall extending along a tube axis with a fluid dispensing outlet port at one end and having an internal plunger adapted for motion along said tube axis, comprising:
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A. means for supporting said syringe wall whereby said tube axis is substantially parallel to a reference axis associated with said device, B. means for selectively driving said plunger over a predetermined range of motion along said tube axis, including; i. driver member for engaging said plunger, ii. stepper motor having an output shaft, said motor being responsive to an applied pulse to rotate said shaft a predetermined angular increment in a first direction, iii. coupling means for coupling said output shaft to said driver member whereby said driver member translates a predetermined linear increment along said reference axis in response to each of said incremental rotations of said shaft, and iv. control means including a battery power supply and an associated electrical circuit means operative in a pump mode for generating a succession of said pulses, and for applying said succession of pulses to said motor, said circuit means being characterized by relatively high current drain from said power supply during said pulses and relatively low current drain from said power supply between said pulses, wherein said coupling means includes; i. a first roller and second roller, ii. an endless belt disposed about said first and second rollers, iii. motor coupler means for coupling rotory motion of said output shaft to said first roller, whereby said first roller rotates a predetermined angular increment and said belt translates a predetermined linear increment in response to each of said incremental rotations of said shaft, iv. drive coupling means for selectively coupling said belt to said driver member. - View Dependent Claims (2, 3, 4, 15, 16)
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5. An infusion device adapted for coupling to a syringe having an elongated tubular wall extending along a tube axis with a fluid dispensing outlet port at one end and having an internal plunger adapted for motion along said tube axis, comprising:
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A. means for supporting said syringe wall whereby said tube axis is substantially parallel to a reference axis associated with said device, B. means for selectively driving said plunger over a predetermined range of motion along said tube axis, including; i. driver member for engaging said plunger, ii. stepper motor having an output shaft, said motor being responsive to an applied pulse to rotate said shaft a predetermined angular increment in a first direction, iii. coupling means for coupling said output shaft to said driver member whereby said driver member translates a predetermined linear increment along said reference axis in response to each of said incremental rotations of said shaft, and iv. control means including a battery power supply and an associated electrical circuit means operative in a pump mode for generating a succession of said pulses, and for applying said succession of pulses to said motor, said circuit means being characterized by relatively high current drain from said power supply during said pulses and relatively low current drain from said power supply between said pulses, further comprising a sensor positioned on said support means and including means for generating a force signal representative of force applied thereto in the direction of said reference axis, and wherein said control means includes circuitry responsive to said force signal for generating an alarm signal when said force signal is representative of a force above a predetermined threshold value. - View Dependent Claims (6, 7, 8)
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9. An infusion device adapted for coupling to a syringe having an elongated tubular wall extending along a tube axis with a fluid dispensing outlet port at one end and having an internal plunger adapted for motion along said tube axis, comprising:
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A. means for supporting said syringe wall whereby said tube axis is substantially parallel to a reference axis associated with said device, B. means for selectively driving said plunger over a predetermined range of motion along said tube axis, including; i. driver member for engaging said plunger, ii. stepper motor having an output shaft, said motor being responsive to an applied pulse to rotate said shaft a predetermined angular increment in a first direction, iii. coupling means for coupling said output shaft to said driver member whereby said driver member translates a predetermined linear increment along said reference axis in response to each of said incremental rotations of said shaft, and iv. control means including a battery power supply and an associated electrical circuit means operative in a pump mode for generating a succession of said pulses, and for applying said succession of pulses to said motor, said circuit means being characterized by relatively high current drain from said power supply during said pulses and relatively low current drain from said power supply between said pulses, further comprising; size means positioned on said support means for generating a syringe size signal representative of the size of said syringe, and wherein said control means includes circuitry responsive to said syringe size signal to control the pulse repetition rate of said succession of pulses in a predetermined manner. - View Dependent Claims (10, 11, 12, 13, 14)
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17. An infusion device adapted for coupling to a syringe having an elongated tubular wall extending along a tube axis with a fluid dispensing outlet port at one end and having an internal plunger adapted for motion along said tube axis, comprising:
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A. means for supporting said syringe wall whereby said tube axis is substantially parallel to a reference axis associated with said device, B. means for selectively driving said plunger over a predetermined range of motion along said tube axis, including; i. driver member for engaging said plunger, ii. stepper motor having an output shaft, said motor being responsive to an applied pulse to rotate said shaft a predetermined angular increment in a first direction, iii. coupling means for coupling said output shaft to said driver member whereby said driver member translates a predetermined linear increment along said reference axis in response to each of said incremental rotations of said shaft, and iv. control means including a battery power supply and an associated electrical circuit means operative in a pump mode for generating a succession of said pulses, and for applying said succession of pulses to said motor, said circuit means being characterized by relatively high current drain from said power supply during said pulses and relatively low current drain from said power supply between said pulses, wherein said syringe includes a laterally extending flange at the upstream end of said tubular wall, wherein the distance between said syringe outlet port and said upstream end is a predetermined value associated with the size of said syringe, said device further comprising; A. an elongated flexible tube defining a central bore therethrough, and B. a rigid connector member affixed to said tube and defining a linear central bore extending therethrough, said bores defining a continuous passageway, extending from an input port of said connector member, and said connector member and including means for coupling said input port to said outlet port of said syringe, and wherein said connector member includes at least two support portions spaced apart along the axis of said connector member central bore and an interface portion connecting said support portions, and wherein the outer surfaces of said support portions are substantially identical in shape, said shape being adapted to interfit with said support member, whereby either of said support portions may be supported by said support means, and wherein said means for supporting said syringe further includes a first support member adapted to support one of said support portions and a second support member including a set of slots adapted for receiving said flange, each of said slots being a distance along said reference axis from said first support member associated with the size of said syringe.
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Specification