Patent EP0179587A2 successfully refreshed from Google Patents.
EP0179587A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Power system for infusion pumps
Assignee: Baxter International Inc
•
Filing: 1985-10-04
•
Granted: —
•
Expires: 2005-10-04
Abstract
Abstract A safety system for battery-operated, microprocessor- controlled infusion pumps using separate primary and reserve batteries. When the primary battery nears exhaustion, the reserve battery is switched in and an interval timer is started, but the pump operation is not interfered with. At the expiration of the timer interval, the pump is switched to a KVO mode to keep it in minimal operation as long as possible. When the reserve battery also nears exhaustion, the microprocessor is signalled to perform an orderly shutdown routine while battery power is still available. Audible alarms may be provided to apprise nursing person- hel of the various phases in the system's operation.
Inventors
- 👤 Robert Russell Weyant
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 02:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16831
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A nafety system for an infusion pump which can be powered by first and second batteries, comprising : a) a variable speed infusion pump; b) switch means for selectively connecting said first and second batteries to power said pump, and for controlling the speed of said pump; c) voltage sensing means for actuating said switch means when the voltage of the power supplied to said pump drops below a predetermined pump threshold level; and d) timing means responsive to an actuation of said switch means for producing a further actuation of said switch means following a predetermined time interval.
Claim 2
Dependent Claim
99 words
A nafety system for an infusion pump which can be powered by first and second batteries, comprising : a) a variable speed infusion pump; b) switch means for selectively connecting said first and second batteries to power said pump, and for controlling the speed of said pump; c) voltage sensing means for actuating said switch means when the voltage of the power supplied to said pump drops below a predetermined pump threshold level; and d) timing means responsive to an actuation of said switch means for producing a further actuation of said switch means following a predetermined time interval.
Claim 3
Dependent Claim
104 words
A system according to claim 1, in which : e) said pump is normally powered in a primary mode by said first battery at normal operating speed; f) when the voltage of the pump power in said primary mode drops below said threshold, said switch means i) switch said pump to a reserve mode in which said pump is powered by at least said second battery; ii) maintain said pump at normal operating speed; and iii) start said timing means; and g) when said predetermined time interval has elapsed, said switch means reduce the speed of said pump to a "keep vein open" level.
Claim 4
Dependent Claim
32 words
A system according to claim 2, in which, when the voltage of the pump power in said reserve mode drops below a predetermined threshold level, said switch means shut down said pump.
Claim 5
Independent Claim
50 words
A system according to any and of claims 1 to 3, further comprising alarm means operatively connected to said switch means ior indicating an alarm condition whenever said pump is powered by said second battery, said alarm means being arranged to continue functioning substantially beyond the shutdown of said pump.
Claim 6
Dependent Claim
25 words
A system according to claim 4, in which said alarm means produces alarm signals of increasingly attention-demanding nature upon each actuation of said switch means.
Claim 7
Independent Claim
26 words
A system according to any one of claims 2 to 5, in which said pump may be powered by both said batteries during the reserve mode.
Claim 8
Independent Claim
27 words
A system according to any one of claims 1 to 6, further comprising protection means for preventing said first battery from drawing current from said second battery.
Claim 9
Independent Claim
104 words
A method of providing operational safety for a variable-speed, battery-operated infusion pump, comprising the steps of : a) operating said pump at normal operating speed in a prinary mode wherein said pump ic powered by a primary battery, as long as the primary battery voltage remains above a predetermined threshold level; b) operating said pump at normal operating speed in a reserve mode wherein said pump is powered at least by a reserve battery for a predetermined time interval after said primary battery voltage drops below said threshold; c) operating said pump at "keep vein open" speed in said reserve mode following said interval.
Claim 10
Independent Claim
104 words
A method of providing operational safety for a variable-speed, battery-operated infusion pump, comprising the steps of : a) operating said pump at normal operating speed in a prinary mode wherein said pump ic powered by a primary battery, as long as the primary battery voltage remains above a predetermined threshold level; b) operating said pump at normal operating speed in a reserve mode wherein said pump is powered at least by a reserve battery for a predetermined time interval after said primary battery voltage drops below said threshold; c) operating said pump at "keep vein open" speed in said reserve mode following said interval.
Claim 11
Dependent Claim
31 words
A method according to claim 8, further comprising the step of shutting down said pump when the voltage of said pump power in said reserve mode drops below a predetermined threshold.
Claim 12
Dependent Claim
27 words
A method according to claim 8 or claim 9, in which said pump is powered by both the primary and the reserve battery in said reserve mode.
Claim 13
Dependent Claim
24 words
A method according to claim 10, further comprising the step of preventing current from being drawn by said primary battery from said reserve battery.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.