WO2003051429A1 - Improvements in and relating to medicament injection apparatus - Google Patents

Improvements in and relating to medicament injection apparatus Download PDF

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Publication number
WO2003051429A1
WO2003051429A1 PCT/GB2002/005695 GB0205695W WO03051429A1 WO 2003051429 A1 WO2003051429 A1 WO 2003051429A1 GB 0205695 W GB0205695 W GB 0205695W WO 03051429 A1 WO03051429 A1 WO 03051429A1
Authority
WO
WIPO (PCT)
Prior art keywords
medicament
injection
completion
injection device
time elapsed
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB2002/005695
Other languages
French (fr)
Inventor
Christopher Nigel Langley
Robert Frederick Veasey
Robert Woolston
Shane Alistair Day
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DCA Design International Ltd
Original Assignee
DCA Design International Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9927769&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2003051429(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to DE60233598T priority Critical patent/DE60233598D1/en
Priority to CA2470651A priority patent/CA2470651C/en
Priority to BRPI0215190A priority patent/BRPI0215190B1/en
Priority to HRP20040563AA priority patent/HRP20040563B1/en
Priority to MXPA04005897A priority patent/MXPA04005897A/en
Priority to IL16258602A priority patent/IL162586A0/en
Priority to SI200230860T priority patent/SI1465689T1/en
Priority to HK05109258.3A priority patent/HK1077239B/en
Application filed by DCA Design International Ltd filed Critical DCA Design International Ltd
Priority to PL370742A priority patent/PL199003B1/en
Priority to AU2002366304A priority patent/AU2002366304B2/en
Priority to HU0500003A priority patent/HU228732B1/en
Priority to DK02804960T priority patent/DK1465689T3/en
Priority to EA200400820A priority patent/EA007639B1/en
Priority to KR10-2004-7009600A priority patent/KR20040096506A/en
Priority to JP2003552358A priority patent/JP4847678B2/en
Priority to EP02804960A priority patent/EP1465689B1/en
Priority to AT02804960T priority patent/ATE441445T1/en
Publication of WO2003051429A1 publication Critical patent/WO2003051429A1/en
Priority to IL162586A priority patent/IL162586A/en
Priority to ZA2004/04858A priority patent/ZA200404858B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • 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
    • A61M5/14566—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 receiving a piston rod of the pump
    • 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
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M2005/31588—Constructional features or modes of drive mechanisms for piston rods electrically driven
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/52—General characteristics of the apparatus with microprocessors or computers with memories providing a history of measured variating parameters of apparatus or patient
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
    • 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
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31525—Dosing
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31546—Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • A61M5/3157—Means providing feedback signals when administration is completed
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means

Definitions

  • the present invention relates to a medicament injection apparatus.
  • the invention has application for electronically controlled injection apparatus whereby self-administration of a dose of medicament is enabled.
  • Such apparatus generally utilize a medicament cartridge in which a medicament is stored and comprise a microprocessor that controls a drive mechanism to deliver a controlled dosage of medicament through a needle arrangement.
  • the apparatus are small enough readily to be carried about by a user. As such, the apparatus is particularly suitable for use by those with diabetes.
  • the invention is also suitable for other kinds of medicament injection apparatus, for example injection apparatus in which though the dose setting and dose delivery are purely mechanical in character a timer is actuated following completion of a dose delivery stroke to indicate a time elapsed since completion of dose delivery stroke.
  • a needle unit of the medicament injection apparatus is inserted into a body of a patient.
  • the drive mechanism is then actuated to cause the selected dosage of medicament to be expelled from the medicament cartridge into the body of the patient.
  • the injection interval that is the time elapsed since a previous injection, is measured following completion of a delivery stroke rather than from dispersion of the injected medicament.
  • the time elapsed following an injection operation is calculated from the end of a predetermined period during which medicament is permitted to disperse subsequent to completion of an injection stroke.
  • the medicament injection apparatus provides a signal following completion of the injection operation. This has the advantage. that a user will not inadvertently remove the medicament injection apparatus until after the medicament has been allowed to disperse.
  • a method of operation of a medicament injection apparatus comprising a processor having a timer, a medicament cartridge containing medicament, a needle unit to allow medicament to be expelled from the medicament cartridge and a drive means to cause medicament to be expelled from the medicament cartridge
  • steps of i) operating the drive means to expel medicament from the medicament cartridge ii) upon completion of step i) starting a timer to measure a predetermined period; iii) upon completion of step ii) resetting the timer to measure the time elapsed since step ii).
  • step ii) also includes upon completion of step ii) causing a signal to be emitted.
  • the method further includes concurrent with step iii) displaying the time elapsed since step ii).
  • FIG. 1 shows schematically an arrangement in accordance with the present invention.
  • the medicament injection device 2 comprises a housing 4, a control unit or microprocessor 6, a drive means 8, a piston 10 and a needle unit 12.
  • a medicament cartridge 14, which is preferably replaceable, is located between the piston 10 and the needle unit 12.
  • the medicament cartridge 14 includes a closure at a first end adapted to be pierced by the needle unit and a moveable plunger located towards a second end of the medicament cartridge and adapted to be driven by the piston 10 towards the first end of the medicament cartridge 14.
  • the control unit or microprocessor 6 includes a timer. In use, a dosage of medicament to be injected is set. The drive means 8 is then actuated to drive the piston 10. The drive means 8 may be actuated mechanically or under the control of the control unit or microprocessor 6. Medicament from within the medicament cartridge 14 is then expelled from the medicament injection device 2.
  • the microprocessor 6 operates the drive means 8 to advance the piston 10.
  • the drive means may be operated manually to advance the piston.
  • the microprocessor monitors the operation of the drive means, hi each case, the piston is advanced to expel a dosage of medicament from within the medicament cartridge.
  • the medicament injection device 6 may also include other elements for fulfilling further functions as required and known in the art.
  • the timer associated with the control unit or microprocessor 6 is actuated on completion of movement of the piston 10 - the injection stroke. A predetermined period of time is then allowed to lapse to permit dispersion of the medicament within the patient. On completion of this first time period, the timer is reset to zero and actuated once more. The timer now records the injection interval in accordance with the present invention.
  • the medicament injection apparatus 2 may additionally incorporate a display 16.
  • the display may conveniently comprise an LCD display.
  • the display 16 may be used to indicate the duration of the injection interval.
  • the medicament injection apparatus 2 may further incorporate a signaling device 18 such as a sounder to signal to the user that the dispersion period has elapsed and that the needle unit may be removed.
  • a signaling device 18 such as a sounder to signal to the user that the dispersion period has elapsed and that the needle unit may be removed.
  • the user may take the indication of the injection interval on the display 16 as sufficient indication that the dispersion period has elapsed.
  • a user of the medicament injection device 6 will first operate the medicament injection device 6 to select a dosage of medicament to be injected by the medicament injection device 6.
  • the needle unit 12 will then be inserted into a body of the patient to allow the medicament to be injected.
  • the medicament injection device 6 is then operated to cause the piston 10 to advance.
  • the microprocessor 6 causes a signal, either visual, audible or both, to be given indicating that the needle unit 12 may be removed from the patient.
  • a sounder 18 may be used to generate the signal if an audible signal is required.
  • the microprocessor 6 resets the timer to zero and then measures the time elapsed since the signal was given.
  • the time elapsed since the signal was given may be indicated to a user on the display 16.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Confectionery (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

The present invention relates to a medicament injection apparatus, particularly suitable for use by those with diabetes in which, in use, once a desired dosage of medicament has been selected and expelled from the medicament cartridge into the body of the patient, the injected medicament is allowed to disperse locally from the injection site within the patient's body before the needle arrangement is removed from the patient's body. It is considered to be a problem that in known medicament injection devices the injection interval, that is the time elapsed since a previous injection, is measured following completion of a delivery stroke rather than from dispersion of the injected medicament. A medicament injection device is disclosed in which the time elapsed following an injection operation is calculated from the end of a predetermined period during which medicament is permitted to disperse subsequent to completion of an injection stroke.

Description

Improvements in and relating to medicament injection apparatus.
The present invention relates to a medicament injection apparatus. In particular, but not exclusively, the invention has application for electronically controlled injection apparatus whereby self-administration of a dose of medicament is enabled.
Such apparatus generally utilize a medicament cartridge in which a medicament is stored and comprise a microprocessor that controls a drive mechanism to deliver a controlled dosage of medicament through a needle arrangement. The apparatus are small enough readily to be carried about by a user. As such, the apparatus is particularly suitable for use by those with diabetes.
The invention is also suitable for other kinds of medicament injection apparatus, for example injection apparatus in which though the dose setting and dose delivery are purely mechanical in character a timer is actuated following completion of a dose delivery stroke to indicate a time elapsed since completion of dose delivery stroke.
In each case, in use, once a desired dosage of medicament has been selected a needle unit of the medicament injection apparatus is inserted into a body of a patient. The drive mechanism is then actuated to cause the selected dosage of medicament to be expelled from the medicament cartridge into the body of the patient.
However, it is necessary once the injection has been made to allow the injected medicament to disperse locally from the injection site within the patient's body before removing the needle arrangement from the patient's body.
It is considered to be a problem, that in known medicament injection devices the injection interval, that is the time elapsed since a previous injection, is measured following completion of a delivery stroke rather than from dispersion of the injected medicament.
According to a first aspect of the present invention in a medicament injection device the time elapsed following an injection operation is calculated from the end of a predetermined period during which medicament is permitted to disperse subsequent to completion of an injection stroke.
This has as an advantage that the injection interval is measured from the end of the dispersion period.
Preferably, the medicament injection apparatus provides a signal following completion of the injection operation. This has the advantage. that a user will not inadvertently remove the medicament injection apparatus until after the medicament has been allowed to disperse.
According to a second aspect of the present invention, a method of operation of a medicament injection apparatus comprising a processor having a timer, a medicament cartridge containing medicament, a needle unit to allow medicament to be expelled from the medicament cartridge and a drive means to cause medicament to be expelled from the medicament cartridge comprising the steps of i) operating the drive means to expel medicament from the medicament cartridge; ii) upon completion of step i) starting a timer to measure a predetermined period; iii) upon completion of step ii) resetting the timer to measure the time elapsed since step ii).
Preferably, step ii) also includes upon completion of step ii) causing a signal to be emitted.
Preferably, the method further includes concurrent with step iii) displaying the time elapsed since step ii).
The invention will now be described, by way of example only, with reference to the accompanying drawings in which; Figure 1 shows schematically an arrangement in accordance with the present invention. Referring to the Figure, a schematic arrangement of a medicament injection device according to the present invention is disclosed. The medicament injection device 2 comprises a housing 4, a control unit or microprocessor 6, a drive means 8, a piston 10 and a needle unit 12. A medicament cartridge 14, which is preferably replaceable, is located between the piston 10 and the needle unit 12. The medicament cartridge 14 includes a closure at a first end adapted to be pierced by the needle unit and a moveable plunger located towards a second end of the medicament cartridge and adapted to be driven by the piston 10 towards the first end of the medicament cartridge 14.
The control unit or microprocessor 6 includes a timer. In use, a dosage of medicament to be injected is set. The drive means 8 is then actuated to drive the piston 10. The drive means 8 may be actuated mechanically or under the control of the control unit or microprocessor 6. Medicament from within the medicament cartridge 14 is then expelled from the medicament injection device 2.
In the illustrated embodiment, the microprocessor 6 operates the drive means 8 to advance the piston 10. However, in an alternative embodiment, the drive means may be operated manually to advance the piston. In this latter case, the microprocessor monitors the operation of the drive means, hi each case, the piston is advanced to expel a dosage of medicament from within the medicament cartridge.
The medicament injection device 6 may also include other elements for fulfilling further functions as required and known in the art.
The timer associated with the control unit or microprocessor 6 is actuated on completion of movement of the piston 10 - the injection stroke. A predetermined period of time is then allowed to lapse to permit dispersion of the medicament within the patient. On completion of this first time period, the timer is reset to zero and actuated once more. The timer now records the injection interval in accordance with the present invention. The medicament injection apparatus 2 may additionally incorporate a display 16. The display may conveniently comprise an LCD display. The display 16 may be used to indicate the duration of the injection interval.
The medicament injection apparatus 2 may further incorporate a signaling device 18 such as a sounder to signal to the user that the dispersion period has elapsed and that the needle unit may be removed. Alternatively, the user may take the indication of the injection interval on the display 16 as sufficient indication that the dispersion period has elapsed.
A user of the medicament injection device 6 will first operate the medicament injection device 6 to select a dosage of medicament to be injected by the medicament injection device 6. The needle unit 12 will then be inserted into a body of the patient to allow the medicament to be injected. The medicament injection device 6 is then operated to cause the piston 10 to advance.
The user must then allow a short period to elapse to allow the medicament to disperse. If the needle unit 12 is removed too quickly the medicament will escape through the needle wound resulting in an incorrect dosage of medicament having been administered. Thus, when a predetermined time has elapsed following the injection stroke the microprocessor 6 causes a signal, either visual, audible or both, to be given indicating that the needle unit 12 may be removed from the patient. A sounder 18 may be used to generate the signal if an audible signal is required.
At the same time as the signal is given, the microprocessor 6 resets the timer to zero and then measures the time elapsed since the signal was given. The time elapsed since the signal was given may be indicated to a user on the display 16.

Claims

1 A medicament injection device in which time elapsed following an injection operation is calculated from the end of a predetermined period during which medicament is permitted to disperse subsequent to completion of an injection stroke.
2 A medicament injection device according to claim 1, in which the medicament injection device signals the end of the injection operation.
3 A medicament injection device according to claim 1 or claim 2, the medicament injection device comprising a drive means and a timer associated with control means, in which the timer measures the predetermined period from completion of operation of the drive means and the control unit resets the timer upon completion of the predetermined period to measure the time elapsed following the injection operation.
4 A medicament injection device according to claim 3, in which the medicament injection device further includes a display to indicate the time elapsed following the injection operation.
5 A medicament injection device according to claim 3 or claim 4, in which the medicament injection device further includes means to indicate the end of the predetermined period from completion of operation of the drive means.
6 A method of operation of a medicament injection device according to any previous claim comprising the steps of i) operating the drive means to expel medicament from the medicament cartridge; ii) upon completion of step i) starting a timer to measure a predetermined period; iii) upon completion of step ii) resetting the timer to measure the time elapsed since step ii).
7 A method according to claim 6, in which step ii) also includes upon completion of step ii) causing a signal to be emitted. 8 A method according to claim 6 or claim 7, in which concurrent with step iii) the time elapsed since step ii) is displayed.
PCT/GB2002/005695 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus Ceased WO2003051429A1 (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
AT02804960T ATE441445T1 (en) 2001-12-18 2002-12-16 MEDICAL SYRINGE WITH TIMER
AU2002366304A AU2002366304B2 (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus
BRPI0215190A BRPI0215190B1 (en) 2001-12-18 2002-12-16 medicine injection device and method of operation
HRP20040563AA HRP20040563B1 (en) 2001-12-18 2002-12-16 IMPROVEMENTS APPLICABLE TO THE MEDICINAL INJECTION DEVICE AND IN THE APPARATUS
MXPA04005897A MXPA04005897A (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus.
IL16258602A IL162586A0 (en) 2001-12-18 2002-12-16 Improvements in and relating to a medicament injection apparatus
SI200230860T SI1465689T1 (en) 2001-12-18 2002-12-16 Medical injection device with timer
DK02804960T DK1465689T3 (en) 2001-12-18 2002-12-16 Medical injection device with timer
CA2470651A CA2470651C (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus
PL370742A PL199003B1 (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus
HU0500003A HU228732B1 (en) 2001-12-18 2002-12-16 Medicament injection device with timer
DE60233598T DE60233598D1 (en) 2001-12-18 2002-12-16 Medical syringe with timer
HK05109258.3A HK1077239B (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus
EA200400820A EA007639B1 (en) 2001-12-18 2002-12-16 Injection apparatus
KR10-2004-7009600A KR20040096506A (en) 2001-12-18 2002-12-16 Improvements in and relating to medicament injection apparatus
JP2003552358A JP4847678B2 (en) 2001-12-18 2002-12-16 Improvements related to drug injection devices
EP02804960A EP1465689B1 (en) 2001-12-18 2002-12-16 Medical injection device with timer
IL162586A IL162586A (en) 2001-12-18 2004-06-17 Medicament injection apparatus
ZA2004/04858A ZA200404858B (en) 2001-12-18 2004-06-18 Improvements in and relating to medicament injection apparatus

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GBGB0130139.9A GB0130139D0 (en) 2001-12-18 2001-12-18 Improvements in and relating to a medicament injection apparatus

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JP4847678B2 (en) 2011-12-28
HU228732B1 (en) 2013-05-28
IL162586A (en) 2011-06-30
HRP20040563A2 (en) 2004-12-31
CN101579547A (en) 2009-11-18
SI1465689T1 (en) 2010-01-29
EA200400820A1 (en) 2004-12-30
HK1077239A1 (en) 2006-02-10
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PL199003B1 (en) 2008-08-29
BRPI0215190B1 (en) 2016-01-12
AU2002366304B2 (en) 2009-08-06
DE60233598D1 (en) 2009-10-15
JP2005511252A (en) 2005-04-28
CN1607966A (en) 2005-04-20
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ES2332359T3 (en) 2010-02-03
ZA200404858B (en) 2005-10-26
BR0215190A (en) 2004-11-16
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KR20090115899A (en) 2009-11-09
US20030114801A1 (en) 2003-06-19
MXPA04005897A (en) 2005-03-31
CN100542620C (en) 2009-09-23
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AU2002366304A1 (en) 2003-06-30
IL162586A0 (en) 2005-11-20
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GB0130139D0 (en) 2002-02-06

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