Syringe pump having a pressure sensor assembly

• US 10,391,241 B2
• Filed: 02/20/2015
• Issued: 08/27/2019
• Est. Priority Date: 01/22/2010
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Desch, Martin D., Gray, Larry B., Bodwell, Jesse T., van der Merwe, Dirk A.
• Primary Examiner(s): Gilbert, Andrew M
• Application Number:
  US14/627,287
• Publication Number:
  US 20150157791A1
• Time in Patent Office: 1,649 Days
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2005/16872 Upstream occlusion sensors
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/332 Force measuring means
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3553 remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3569 sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/3576 with non implanted data transmission devices, e.g. using external transmitter or receiver
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 2205/6063 Optical identification systems
• CPC Class Codes: A61M 2205/8206 : battery-operated
• CPC Class Codes: A61M 2209/02 : Equipment for testing the apparatus
• CPC Class Codes: A61M 2209/082 : Mounting brackets, arm supports for equipment
• CPC Class Codes: A61M 2209/086 : Docking stations
• CPC Class Codes: A61M 5/1408 : in parallel, e.g. manifolds, sequencing valves access sites A61M39/02; tube connectors A61M39/10
• CPC Class Codes: A61M 5/1413 : Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/1415 : Stands, brackets or the like for supporting infusion accessories
• CPC Class Codes: A61M 5/14232 : Roller pumps
• CPC Class Codes: A61M 5/1452 : pressurised by means of pistons
• 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 5/1458 : Means for capture of the plunger flange
• CPC Class Codes: A61M 5/16827 : controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16831 : Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/16854 : by monitoring line pressure
• CPC Class Codes: A61M 5/16859 : Evaluation of pressure response, e.g. to an applied pulse
• CPC Class Codes: A61M 5/172 : electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: G01L 7/16 : in the form of pistons
• CPC Class Codes: G01L 9/00 : Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements G01L11/004 takes precedence; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00
• CPC Class Codes: G01L 9/0089 : Transmitting or indicating the displacement of pistons by electrical, electromechanical, magnetic or electromagnetic means G01L9/0008 takes precedence
• CPC Class Codes: G06F 3/0488 : using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G16H 10/65 : stored on portable record carriers, e.g. on smartcards, RFID tags or CD
• CPC Class Codes: G16H 20/10 : relating to drugs or medications, e.g. for ensuring correct administration to patients
• CPC Class Codes: G16H 20/17 : delivered via infusion or injection
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: G16H 40/67 : for remote operation
• CPC Class Codes: G16H 70/40 : relating to drugs, e.g. their side effects or intended usage

Abstract

A syringe pump is disclosed that includes a body, a syringe seat, a syringe actuator, a memory, and one or more processors. The syringe seat is coupled to the body. The syringe actuator is configured to actuate a syringe secured within the syringe seat. The memory is configured to store a plurality of instructions. The one or more processors, in accordance with the plurality of instructions, is/are configured to: prime the syringe pump in a prime phase; determine if an occlusion exists during the prime phase using a first test; stop the prime phase; initiate fluid delivery into a patient; enter into a start-up phase; determine if an occlusion exists using a second test during the start-up phase; transition from the start-up phase into a steady-state phase; and determine if an occlusion exists during the steady-state phase using a third test.

Claims

1. A pressure sensor assembly, comprising:

a plunger comprising;

a sensing surface, the sensing surface having an elongated portion along a first axis and a width along a second axis, the first and second axes are orthogonal relative to each other, wherein the width is about constant along a substantial portion of elongated portion, wherein the elongated portion of the sensing surface defines first and second ends, wherein the first and second ends are curved;

a first extension disposed adjacent to or on the first end of the sensing surface and extending along a third axis orthogonal to the first and second axes away from sensing surface; and

a second extension disposed adjacent to or on the second end of the sensing surface and extending along a fourth axis orthogonal to the first and second axes away from sensing surface, wherein the third and fourth axes are parallel to each other;

a guide configured to guide the movement of the plunger along the third and fourth axes;

a first pressure sensor disposed adjacent to an end of the first extension opposite to the sensing surface, the first pressure sensor is configured to sense movement of the plunger within the guide; and

a second pressure sensor disposed adjacent to an end of the second extension opposite to the sensing surface, the second pressure sensor is configured to sense movement of the plunger within the guide.

2. The pressure sensor assembly according to claim 1, further comprising a seal at least partially disposed over at least a portion of the sensing surface.

3. The pressure sensor assembly according to claim 1, further comprising a brace operatively coupled to the first and second extensions.