Syringe pump control systems and methods
First Claim
1. A cartridge barrel for use in a medication pump comprising a cylindrical barrel wall comprising an open end and a closed end, wherein the closed end defines an orifice, the cartridge barrel further comprising a ridge defined on an interior face of the barrel wall, wherein the barrel wall is more opaque in the region extending from the ridge to the open end than in at least a portion of a remainder of the barrel wall.
3 Assignments
0 Petitions
Accused Products
Abstract
Sensors are described that may be provided in a medication pump. A magnetic sensor detects rotation of an element that is rotated by a motor, where a magnet covers a portion of the element. A light sensor may also be provided that detects if a cartridge is present in a cartridge chamber. A medication cartridge includes an opaque area at its open end for use with the light sensor. Methods of using these sensors to operate the pump area also described.
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Citations
63 Claims
- 1. A cartridge barrel for use in a medication pump comprising a cylindrical barrel wall comprising an open end and a closed end, wherein the closed end defines an orifice, the cartridge barrel further comprising a ridge defined on an interior face of the barrel wall, wherein the barrel wall is more opaque in the region extending from the ridge to the open end than in at least a portion of a remainder of the barrel wall.
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8. A medication pump comprising:
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a motor;
a first element configured to be rotated by the motor, the element having a front face;
a magnet attached to the front face of the first element, wherein a portion of the front face is not covered by the magnet; and
a magnetic field sensor spaced from an off-center location of the magnet. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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- 19. A method for detecting the rotation of a element in a medication pump, wherein the element includes a magnet attached to a front face of the element and a portion of the front face is not covered by the magnet, comprising measuring the magnetic field at a point near the front face.
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23. A medication pump comprising:
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a cartridge chamber for receiving a medication cartridge, the chamber comprising a first open end for receiving the medication cartridge and a second end defining a drive rod opening;
a motor;
a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor; and
a light sensor positioned near the second end of the cartridge chamber configured to detect whether the medication cartridge is located within the cartridge chamber near the second end of the cartridge chamber. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A medication pump system comprising:
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a medication cartridge comprising;
a cylindrical barrel wall comprising an open end and a closed end, wherein the closed end defines an orifice, and a plunger slidably received within the barrel wall; and
a medication pump comprising;
a cartridge chamber for receiving the medication cartridge, the chamber comprising a first open end for receiving the medication cartridge and a second end defining a drive rod opening, a motor, a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor, wherein the interface end is configured to attach to the plunger, and a light sensor positioned near the second end of the cartridge chamber configured to detect whether the medication cartridge is located within the cartridge chamber near the second end of the cartridge chamber. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A method of loading a medication cartridge into a first open end of a cartridge chamber of a medication pump, wherein the pump includes a drive rod extending into the cartridge chamber through a second end, comprising:
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detecting whether or not an old medication cartridge is present near the second end of the cartridge chamber;
if the old medication cartridge is not present, moving a drive rod to an initial loading position; and
prompting a user to insert a new medication cartridge into the cartridge chamber. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A medication pump comprising:
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a cartridge chamber for receiving a medication cartridge, the chamber comprising a first open end for receiving the medication cartridge and a second end defining a drive rod opening;
a motor;
a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor; and
a light sensor including an emitter and a detector, the emitter and detector positioned at opposite ends of a chord through the cartridge chamber, wherein the chord passes through a portion of the medication cartridge when the medication cartridge is in the cartridge chamber, wherein the chord does not pass through the drive rod. - View Dependent Claims (53, 54, 55, 56)
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57. A medication pump comprising:
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a motor;
a light sensor including an emitter and a detector configured to detect whether a medication cartridge is present in the pump;
a rotational sensor configured to detect whether an element attached to the motor is rotating; and
a processor operatively connected to the light sensor, rotational sensor and the motor, wherein the processor operates the motor based on input from the light sensor and rotational sensor. - View Dependent Claims (58, 59, 60, 61, 62, 63)
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Specification