WO2003006090A1 - Syringe pump mechanism - Google Patents

Syringe pump mechanism Download PDF

Info

Publication number
WO2003006090A1
WO2003006090A1 PCT/GB2001/003103 GB0103103W WO03006090A1 WO 2003006090 A1 WO2003006090 A1 WO 2003006090A1 GB 0103103 W GB0103103 W GB 0103103W WO 03006090 A1 WO03006090 A1 WO 03006090A1
Authority
WO
WIPO (PCT)
Prior art keywords
syringe
syringe pump
pump mechanism
rotational
thread
Prior art date
Application number
PCT/GB2001/003103
Other languages
French (fr)
Inventor
Janet Murphy
Original Assignee
Janet Murphy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Janet Murphy filed Critical Janet Murphy
Priority to PCT/GB2001/003103 priority Critical patent/WO2003006090A1/en
Publication of WO2003006090A1 publication Critical patent/WO2003006090A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/1456—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M2005/14573—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for quick connection/disconnection with a driving system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/1458—Means for capture of the plunger flange

Definitions

  • This invention relates to a syringe pump mechanism which may be incorporated into the design of a medical infusion pump forming an apparatus to actuate disposable syringes at an electronically controlled rate by causing the syringe plunger to move relative to the filled section of the syringe thus displacing fluid in the syringe.
  • Syringe pump mechanisms must .translate motor rotational movement into linear movement of the disposable syringe plunger. In addition, they must enable the easy installation of the syringe and hold the syringe in a secure manner to prevent accidental removal whilst still providing for precision linear movement of the plunger plate of the syringe. These requirements mean that syringe pump mechanisms are complex, incorporating a mechanical clutch mechanism to disengage drive from the syringe to facilitate installation of the syringe.
  • An object of this invention is to provide a syringe pump mechanism which achieves all the necessary functions of accuracy of linear movement, security against accidental removal, and ease of location of syringe, in a design which uses few moving parts and no mechanical clutch mechanism.
  • this invention provides a syringe pump mechanism which includes a single drive screw of square-cut thread with a pitch of sufficient magnitude to allow the introduction of the disposable syringe plunger plate in between adjacent screw threads.
  • the syringe plunger plate is held securely in contact with the drive screw by the action of a closing door piece.
  • an infusion pump utilising such a mechanism would comprise of only two moving parts.
  • Figure 1 shows a side view of the complete mechanism.
  • Figure 2 shows the end-on view of the mechanism showing the drive screw (6) engaging the syringe plunger plate (8) which is held in position by the retaining door lever (2)
  • the mechanism comprises a syringe support (1) and an end block (7) between which is located a rotational broad gauge square-cut thread drive screw (6).
  • a plastic disposable syringe (3) is held in position by syringe support (1).
  • the plunger plate (8) of the disposable syringe locates into the gap between adjacent screw threads such that, as the drive screw (6) is rotated by the action of motor drive unit (4) and gear train (5), the plunger plate (8) is moved forward along the length axis of the syringe.
  • a securing door lever (2) allows for the syringe to be installed or removed when open, but retains the syringe securely when closed.
  • Figure 2 shows, end-on, the relative positions of drive screw (6), syringe plunger plate (8) and retaining door (2). No lateral movement of the syringe plunger plate (8) is possible since it is held in position by contact with the drive screw (6), the syringe pump casing (9) and the door (2).

Abstract

A syringe pump mechanism having a rotational square cut thread (6) and a securing door (2) which act together to retain the plunger (8) of a syringe. Mechanical coupling between a motor assembly (4) and the thread (6) allow rotational movement to be translated to linear movement of the syringe.

Description

SYRINGE PUMP MECHANISM
This invention relates to a syringe pump mechanism which may be incorporated into the design of a medical infusion pump forming an apparatus to actuate disposable syringes at an electronically controlled rate by causing the syringe plunger to move relative to the filled section of the syringe thus displacing fluid in the syringe.
Syringe pump mechanisms must .translate motor rotational movement into linear movement of the disposable syringe plunger. In addition, they must enable the easy installation of the syringe and hold the syringe in a secure manner to prevent accidental removal whilst still providing for precision linear movement of the plunger plate of the syringe. These requirements mean that syringe pump mechanisms are complex, incorporating a mechanical clutch mechanism to disengage drive from the syringe to facilitate installation of the syringe.
An object of this invention is to provide a syringe pump mechanism which achieves all the necessary functions of accuracy of linear movement, security against accidental removal, and ease of location of syringe, in a design which uses few moving parts and no mechanical clutch mechanism.
Accordingly, this invention provides a syringe pump mechanism which includes a single drive screw of square-cut thread with a pitch of sufficient magnitude to allow the introduction of the disposable syringe plunger plate in between adjacent screw threads. The syringe plunger plate is held securely in contact with the drive screw by the action of a closing door piece. Apart from the motor drive an infusion pump, utilising such a mechanism would comprise of only two moving parts.
A preferred embodiment of the invention will be described with reference to the accompanying drawings in which :
Figure 1 shows a side view of the complete mechanism.
Figure 2 shows the end-on view of the mechanism showing the drive screw (6) engaging the syringe plunger plate (8) which is held in position by the retaining door lever (2)
As shown in Figure 1, the mechanism comprises a syringe support (1) and an end block (7) between which is located a rotational broad gauge square-cut thread drive screw (6). A plastic disposable syringe (3) is held in position by syringe support (1). The plunger plate (8) of the disposable syringe locates into the gap between adjacent screw threads such that, as the drive screw (6) is rotated by the action of motor drive unit (4) and gear train (5), the plunger plate (8) is moved forward along the length axis of the syringe. A securing door lever (2) allows for the syringe to be installed or removed when open, but retains the syringe securely when closed.
Figure 2 shows, end-on, the relative positions of drive screw (6), syringe plunger plate (8) and retaining door (2). No lateral movement of the syringe plunger plate (8) is possible since it is held in position by contact with the drive screw (6), the syringe pump casing (9) and the door (2).

Claims

A syringe pump mechanism including a rotational broad pitch square cut screw thread and securing door so arranged that a syringe plunger can be retained between adjacent threads of the screw and the door piece.
A mechanism as claimed in Claim 1 where mechanical coupling between the rotational screw thread and a motor can cause the rotation of the thread and the linear movement of the retained syringe plunger.
A mechanism as claimed in Claim 1 or Claim 2 where the securing door may be opened away from the rotational screw thread to allow insertion of a syringe into the mechanism.
A syringe pump mechanism substantially as herein described and illustrated in the accompanying drawings.
PCT/GB2001/003103 2001-07-10 2001-07-10 Syringe pump mechanism WO2003006090A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB2001/003103 WO2003006090A1 (en) 2001-07-10 2001-07-10 Syringe pump mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2001/003103 WO2003006090A1 (en) 2001-07-10 2001-07-10 Syringe pump mechanism

Publications (1)

Publication Number Publication Date
WO2003006090A1 true WO2003006090A1 (en) 2003-01-23

Family

ID=9908343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003103 WO2003006090A1 (en) 2001-07-10 2001-07-10 Syringe pump mechanism

Country Status (1)

Country Link
WO (1) WO2003006090A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6750572B2 (en) 2002-03-01 2004-06-15 Honeywell International, Inc. Generator with improved lubrication and cooling system
WO2008024814A3 (en) * 2006-08-23 2008-04-17 Medtronic Minimed Inc Infusion medium delivery device and method with drive device for driving plunger in reservoir
US8277415B2 (en) 2006-08-23 2012-10-02 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US8512288B2 (en) 2006-08-23 2013-08-20 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US9089641B2 (en) 2007-04-30 2015-07-28 Medtronic Minimed, Inc. Automated filling systems and methods
US9522225B2 (en) 2007-04-30 2016-12-20 Medtronic Minimed, Inc. Adhesive patch systems and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505709A (en) * 1994-09-15 1996-04-09 Minimed, Inc., A Delaware Corporation Mated infusion pump and syringe
US5954697A (en) * 1998-03-02 1999-09-21 Srisathapat; Chad Threaded nut syringe plunger for use with a medication infusion pump
US6048334A (en) * 1996-10-18 2000-04-11 Medrad, Inc. Syringe, injector and injector system
WO2000047254A1 (en) * 1999-02-09 2000-08-17 Alaris Medical Systems, Inc. Directly engaged syringe driver system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505709A (en) * 1994-09-15 1996-04-09 Minimed, Inc., A Delaware Corporation Mated infusion pump and syringe
US6048334A (en) * 1996-10-18 2000-04-11 Medrad, Inc. Syringe, injector and injector system
US5954697A (en) * 1998-03-02 1999-09-21 Srisathapat; Chad Threaded nut syringe plunger for use with a medication infusion pump
WO2000047254A1 (en) * 1999-02-09 2000-08-17 Alaris Medical Systems, Inc. Directly engaged syringe driver system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6750572B2 (en) 2002-03-01 2004-06-15 Honeywell International, Inc. Generator with improved lubrication and cooling system
US9199030B2 (en) 2005-05-06 2015-12-01 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US8512288B2 (en) 2006-08-23 2013-08-20 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
CN102961792B (en) * 2006-08-23 2014-06-18 美敦力迷你迈德公司 Infusion medium delivery device and method with drive device for driving plunger in reservoir
US7905868B2 (en) 2006-08-23 2011-03-15 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
EP2407192A1 (en) * 2006-08-23 2012-01-18 Medtronic MiniMed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US8277415B2 (en) 2006-08-23 2012-10-02 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US8444607B2 (en) 2006-08-23 2013-05-21 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US7736344B2 (en) 2006-08-23 2010-06-15 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
US7744589B2 (en) 2006-08-23 2010-06-29 Medtronic Minimed, Inc. Infusion medium delivery device and method with drive device for driving plunger in reservoir
WO2008024814A3 (en) * 2006-08-23 2008-04-17 Medtronic Minimed Inc Infusion medium delivery device and method with drive device for driving plunger in reservoir
US9089641B2 (en) 2007-04-30 2015-07-28 Medtronic Minimed, Inc. Automated filling systems and methods
US9205191B2 (en) 2007-04-30 2015-12-08 Medtronic Minimed, Inc. Automated filling systems and methods
US9522225B2 (en) 2007-04-30 2016-12-20 Medtronic Minimed, Inc. Adhesive patch systems and methods
US9980879B2 (en) 2007-04-30 2018-05-29 Medtronic Minimed, Inc. Automated filling systems and methods
US10772796B2 (en) 2007-04-30 2020-09-15 Medtronic Minimed, Inc. Automated filling systems and methods

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