Patent EP0275213A2 successfully refreshed from Google Patents.
EP0275213A2
Expired / Lapsed
EP
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Medication infusion system
Assignee: Minimed Technologies Ltd
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Filing: 1988-01-15
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Granted: —
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Expires: 2008-01-15
Abstract
Abstract A disposable cassette (12) for use with a main infusion pump unit (10) which contains both a disposable pump (20) and a battery (22), thereby requiring the simultaneous replacement of both the pump (20) and the battery (22). A controller (16) contained in the main pump unit (10) controls a prime mover (14) which drives the pump (20) and also includes a timer (78) which prevents the cassette (12) from being used for longer than a predetermined time, which is substantially less than the life of the battery (22). An interlock system prevents a cassette (12) from being reinstalled following a single use.
Inventors
- 👤 Alfred E. Mann
- 👤 Joseph H. Schulman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1413; A61B; A61B90/00; A61B90/08; A61B2090/0814; A61M5/142; A61M5/14244; A61M5/50; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
115 words
A medication infusion system for infusing fluid into a living body, comprising: a fluid pump (20) having an inlet (26) to which the fluid is supplied from a source, and an outlet (28) from which the fluid is pumped, a prime mover (14) for diving the fluid pump (20), and a battery (22) for powering the system, characterised in that an electronic controller (16) controls the operation of the prime mover (14) to cause the fluid pump to pump precisely metered amounts of fluid at preselected times, the battery (22) powers the prime mover (14) and/or the electronic controller (14) and the battery (22) is attached to and is disposable with the fluid pump (20).
Claim 2
Dependent Claim
115 words
A medication infusion system for infusing fluid into a living body, comprising: a fluid pump (20) having an inlet (26) to which the fluid is supplied from a source, and an outlet (28) from which the fluid is pumped, a prime mover (14) for diving the fluid pump (20), and a battery (22) for powering the system, characterised in that an electronic controller (16) controls the operation of the prime mover (14) to cause the fluid pump to pump precisely metered amounts of fluid at preselected times, the battery (22) powers the prime mover (14) and/or the electronic controller (14) and the battery (22) is attached to and is disposable with the fluid pump (20).
Claim 3
Dependent Claim
69 words
A system as claimed in Claim 1 characterised by a main pump housing (18) containing the prime mover (14) and the electronic controller (16) in an assembly defining a main pump unit (10); and a cassette housing (24) containing the disposable fluid pump (22) and battery (22) in an integral package defining a disposable cassette (12), the disposable cassette (12) being removably attachable to the main pump unit (10).
Claim 4
Dependent Claim
53 words
A system as claimed in Claim 2 characterised by connecting means comprising electrical battery terminals (56,58) located on the disposable cassette (12) and electrical contacts (60,62) located on the main pump housing (10) arranged to contact the battery terminals (56,58) when the disposable cassette (12) is attached to the main pump unit (10).
Claim 5
Dependent Claim
30 words
A system as claimed in Claim 2 or Claim 3 characterised by means for preventing reuse of the disposable cassette (12) after initial detachment from the main pump unit (10).
Claim 6
Dependent Claim
160 words
A system as claimed in Claim 4 characterised in that the preventing means comprises: a spring loaded switch (82) having a pin (84) biased to extend out of the main pump housing (18); a notch (16) in a lower corner of the cassette housing (12); a sloped link (88) which extends at an angle across the notch and which permits the disposable cassette (12) to be inserted past the pin (84), the angled surface of the sloped link (88) sliding the pin (84) back into the switch (82); and a bumper (90) protruding from the main pump housing (11) and being arranged to fit within the notch (86) when the disposable cassette (12) is attached to the main pump unit (10) after the pin (84) is slid back into the switch (82), the bumper (90) either breaking off the sloped link (88), or bending it back so as to deform it permanently, thereby preventing reinsertion of the disposable cassette (12).
Claim 7
Dependent Claim
32 words
A system as claimed in Claim 5 characterised in that the switch (82) is arranged to detect the presence of the disposable cassette (12) and to cause the system to be reset.
Claim 8
Independent Claim
39 words
A system as claimed in any of Claims 5 to 7 characterised in that the preventing means includes means (92-100) for discharging the battery (22) upon attempted reuse of the disposable cassette (12) in order to disable the system.
Claim 9
Independent Claim
104 words
A system as claimed in any preceding claim characterised by means for limiting the use of the system in response to the occurrence of specific circumstances, the limiting means comprising, for example means for limiting the time the system will operate after the installation of a new disposable cassette (12) without the replacement of the that cassette, thereby shutting the system down if the disposable cassette (12) is not replaced within a preset maximum time period, or means for preventing further use of the system if the fluid pump (20) has not operated to pump the fluid for a predetermined maximum period of time.
Claim 10
Independent Claim
136 words
A system as claimed in any preceding claim characterised in that the electronic controller (16) comprises: a CPU (66) for controlling the application of power to the prime mover (14) to cause the fluid to be pumped by the fluid pump (20); a programmer (68) for setting the various parameters of operation of the system which parameters are supplied to the CPU (66); a display (70) for providing a visual indication of information entered through the programmer (68) and for providing information on the operation of the system; a memory (74) for storing information which may be accessed by the CPU (66); and a long life power source (77) for sustaining the memory (74) and the CPU (66) during times when a new disposable cassette (12) is being installed and no main power source is present.
Claim 11
Dependent Claim
25 words
A system as claimed in Claim 9 characterised in that the long life power source (77) is a battery, or a low-leakage long life capacitor.
Claim 12
Independent Claim
81 words
A system as claimed in any of Claims 2 to 10 characterised by means for monitoring the battery (22) in the disposable cassette (12) and means responsive to the monitoring means arranged to provide an alarm if the level of the battery (22) falls below a first predetermined level, and optionally arranged to cause the system to cease pumping fluid if the level of the battery (22) falls below a second predetermined level which is lower than the first predetermined level.
References Cited (Backward Citations)
No citation records indexed.
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