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    Apparatus for infusing fluid
    6.
    发明专利
    Apparatus for infusing fluid 未知

    公开(公告)号：AU2020200590A1

    公开(公告)日：2020-02-13

    申请号：AU2020200590

    申请日：2020-01-28

    Applicant: DEKA PRODUCTS LP

    Inventor： KAMEN DEAN ,  KERWIN JOHN M ,  MURPHY COLIN H ,  GRAY LARRY B ,  PARKER JONATHAN ,  BAIER MICHAEL J ,  LANGENFELD CHRISTOPHER C ,  BIASI JOHN J ,  VAN DER MERWE DIRK A ,  BLUMBERG JR DAVID ,  PLACE MICHAEL S ,  SLATE MICHAEL J ,  PAWLOWSKI DANIEL F ,  SABIN ERIK N ,  NORRIS MICHAEL G ,  THERRIEN ALEXANDER R

    IPC: A61M5/142 ,  A61M5/168

    Abstract: A pump for pumping fluid, the pump comprising a tube platen; a plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger; a bias member configured to urge the plunger toward the tube platen; an inlet 5 valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position; an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position; an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve, wherein the actuator mechanism is configured to mechanically engage and disengage from 10 the plunger, wherein when the actuator mechanism is disengaged from the plunger, the actuator mechanism is configured to mechanically discharge the bias member such that the plunger is a sole force driving the plunger toward the tube platen, wherein the actuator mechanism is configured to engage the plunger to lift the plunger away from the tube platen to thereby mechanically charge the bias member; a pressure sensor disposed adjacent to at 15 least one of the inlet valve, the outlet valve, and the plunger; a position sensor configured to estimate a position of the plunger; and a processor coupled to the position sensor to receive the estimated position of the plunger therefrom. The processor is configured to detect an anomaly based in part on the estimated plunger position when: the inlet valve is in the occluding position, the outlet valve is in the occluding position, the actuator mechanism is 20 mechanically disengaged from the plunger thereby making the bias member the sole source of actuation force of the plunger toward the tube platen, and the bias member urges the plunger toward the tube platen. The processor is further coupled to the pressure sensor to receive a pressure signal from the pressure sensor, the processor is configured to, using the pressure signal, to determine a downstream occlusion exists if a subtraction of a filtered 25 value of a sequential series of sequential trough-to-trough pressure values of a plurality of cycles from a trough-to-trough value is greater than a predetermined threshold.

    Apparatus for infusing fluid
    7.
    发明专利
    Apparatus for infusing fluid 未知

    公开(公告)号：AU2018202508B2

    公开(公告)日：2018-05-24

    申请号：AU2018202508

    申请日：2018-04-10

    Applicant: DEKA PRODUCTS LP

    Inventor： KAMEN DEAN ,  KERWIN JOHN M ,  MURPHY COLIN H ,  GRAY LARRY B ,  PARKER JONATHAN ,  BAIER MICHAEL J ,  LANGENFELD CHRISTOPHER C ,  BIASI JOHN J ,  VAN DER MERWE DIRK A ,  BLUMBERG JR DAVID ,  PLACE MICHAEL S ,  SLATE MICHAEL J ,  PAWLOWSKI DANIEL F ,  SABIN ERIK N ,  NORRIS MICHAEL G ,  THERRIEN ALEXANDER R

    IPC: A61M5/142 ,  A61M5/168

    Abstract: A pump for pumping fluid, the pump comprising a tube platen; a plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger; a bias member configured to urge the plunger toward the tube platen; an inlet 5 valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position; an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position; an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve, wherein the actuator mechanism is configured to mechanically engage and disengage from 10 the plunger, wherein when the actuator mechanism is disengaged from the plunger, the actuator mechanism is configured to mechanically discharge the bias member such that the plunger is a sole force driving the plunger toward the tube platen, wherein the actuator mechanism is configured to engage the plunger to lift the plunger away from the tube platen to thereby mechanically charge the bias member; a pressure sensor disposed adjacent to at 15 least one of the inlet valve, the outlet valve, and the plunger; a position sensor configured to estimate a position of the plunger; and a processor coupled to the position sensor to receive the estimated position of the plunger therefrom. The processor is configured to detect an anomaly based in part on the estimated plunger position when: the inlet valve is in the occluding position, the outlet valve is in the occluding position, the actuator mechanism is 20 mechanically disengaged from the plunger thereby making the bias member the sole source of actuation force of the plunger toward the tube platen, and the bias member urges the plunger toward the tube platen. The processor is further coupled to the pressure sensor to receive a pressure signal from the pressure sensor, the processor is configured to, using the pressure signal, to determine a downstream occlusion exists if a subtraction of a filtered 25 value of a sequential series of sequential trough-to-trough pressure values of a plurality of cycles from a trough-to-trough value is greater than a predetermined threshold. C0) C r 0)0 a)V

    Syringe pump system
    9.
    发明专利
    Syringe pump system 未知

    公开(公告)号：NZ709295A

    公开(公告)日：2017-12-22

    申请号：NZ70929513

    申请日：2013-12-20

    Applicant: DEKA PRODUCTS LP

    Inventor： BAIER MICHAEL J ,  VAN DER MERWE DIRK A ,  PAWLOWSKI DANIEL F ,  NORRIS MICHAEL G ,  THERRIEN ALEXANDER R ,  KAMEN DEAN ,  KERWIN JOHN M ,  GRAY LARRY B ,  BODWELL JESSE T ,  FICHERA STEPHAN L ,  THURBER JONATHAN R ,  DESCH MARTIN D ,  SABIN ERIK N ,  COLLINS DAVID E ,  FARLOW JARED N ,  ZOBRO JONATHAN ,  FRIEDRICH THOMAS A ,  HEINZMANN RICHARD KURT ,  BLUMBERG JR DAVID ,  SLOSS JAMES L ,  LIM SIMON W ,  JANWAY JEFFREY M

    IPC: A61M1/10 ,  A61J7/00 ,  A61M5/145

    Abstract: A method for discharging fluid from a syringe and for mitigating occlusion conditions includes actuating the plunger of a syringe into a barrel. The method monitors fluid pressure within the barrel of the syringe and determines that an occlusion exists when the fluid pressure exceeds a predetermined threshold. The method actuates the plunger out of the barrel by a predetermined amount in response to the detected occlusion and actuates the plunger of the syringe into the barrel until a measured fluid pressure within the barrel of the syringe exceeds another predetermined threshold. A syringe pump for administering an agent to a patient comprises a housing; a lead screw; a linear cam; a half-nut assembly having first and second half-nut arms each having a first end and a second end, wherein the second ends of the first and second half-nut arms are configured to engage with the lead screw, the first and second half-nut arms are pivotally coupled together, the first ends of the first and second half-nut arms are configured to engage with the linear cam such that actuation of the linear cam toward the half-nut assembly causes the first ends of the first and second half-nut arms to pivotally approach each other, and the second ends of the first and second half-nut arms each includes threads configured to engage the lead screw when the first ends of the first and second half-nut arms approach each other caused by actuation of the linear cam; and a plunger head assembly coupled to said half-nut assembly and operative to drive a plunger of a syringe into a barrel of said syringe.

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