INFUSION PUMP

• US 20140197824A1
• Filed: 03/17/2014
• Published: 07/17/2014
• Est. Priority Date: 06/14/2002
• Status: Active Grant

• Current Assignee: Baxter International Inc.
• Original Assignee: Baxter International Inc.
• Inventors: Gillespie, John, LaBedz, Ralph H., Platt, Michael Kenneth, Spang, Ronald H., Berrill, James Frei, Vogel, Matthew Stephen, Greaney, Michelle Kowalski
• Granted Patent: US 9,514,518 B2
• Time in Patent Office: Days
• US Class Current: 324/207.22
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• CPC Class Codes: A61M 2205/21 insensitive to tilting or inclination, e.g. spill-over prevention
• CPC Class Codes: A61M 2205/6054 Magnetic identification systems
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2205/8237 Charging means
• CPC Class Codes: A61M 2209/086 Docking stations
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: G01B 7/00 Measuring arrangements characterised by the use of electric or magnetic techniques
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004
• CPC Class Codes: G06T 3/60 Rotation of whole images or parts thereof
• CPC Class Codes: G16H 20/17 delivered via infusion or injection

Abstract

An infusion pump includes a housing having a compartment structured to receive a syringe and a drive mechanism supported by the housing. The drive mechanism is structured and arranged to contact a syringe plunger of the syringe and move the syringe plunger within a syringe barrel of the syringe. The infusion pump further includes a syringe plunger position sensor and a syringe barrel size sensor. The sensors each include a magnet positioned on the drive mechanism and a magnetic sensor array supported by the housing.

Claims

8-1. The infusion pump of claim 1, wherein the magnetic sensor array detects the orientation of magnetic field lines associated with the magnet.

12. An infusion pump operable with a syringe having a syringe barrel and a syringe plunger moveable within the syringe barrel, the infusion pump comprising:

a housing including

a compartment structured to receive the syringe and defining a wall, and

a syringe clamp moveable towards and away from the wall, the syringe contacting the syringe barrel when the syringe clamp is moved towards the wall,

a drive mechanism supported by the housing, the drive mechanism structured and arranged to contact and end of the syringe plunger so as to be able to move the syringe plunger within the syringe barrel; and

a syringe barrel size sensor including

a magnet operably coupled to the syringe clamp, and

a sensing member supported by the housing and configured to generate an output indicative of a magnetic field associated with the magnet, and

software installed on the pump and configured to use the output to determine a size of the syringe barrel received by the compartment.

13. The infusion pump of claim 12, wherein the magnet is positioned on the syringe clamp.

14. The infusion pump of claim 12, wherein the sensing member includes a plurality of electromagnetic sensors.

15. The infusion pump of claim 12, wherein the sensing member includes a linear sensor array.

16. The infusion pump of claim 12, wherein the sensing member is a single electromagnetic sensor.

17. An infusion pump method comprising:

sensing a magnetic field associated with a first magnet coupled to a syringe clamp to determine a size of a syringe barrel received in a housing of an infusion pump; and

sensing a magnetic field associated with a second magnet to determine a linear position of a syringe plunger moveable inside the syringe barrel.

18. The infusion pump method of claim 17, which includes linearly sensing the magnetic field associated with the first magnet to determine the size of the syringe barrel.

19. The infusion pump method of claim 17, which includes linearly sensing the magnetic field associated with the second magnet to determine the linear position of the syringe plunger moveable inside the syringe barrel.

20. The infusion pump method of claim 17, which includes sensing an orientation of magnetic field lines associated with (i) the first magnet and (ii) the second magnet to determine (a) the size of the syringe barrel and (b) the linear position of the syringe plunger moveable within the syringe barrel, respectively.