Medical fluid injector system
First Claim
1. A medical fluid injector system comprising:
- a syringe plunger driver comprising a drive source and a drive ram, wherein said drive source is operable to advance said drive ram in a fluid discharge direction to cause a discharge of a medical fluid from a syringe when incorporated by said medical fluid injector system; and
drive ram motion control logic configured to derive a drive ram velocity increase from a target pressure by deriving at least one drive ram velocity increase value, wherein said target pressure is associated with advancement of said drive ram in said fluid discharge direction, and wherein said target pressure is a single value throughout a first time range;
wherein said drive ram motion control logic is configured to incrementally increase a drive ram velocity in view of said at least one drive ram velocity increase value during execution of a current phase of an injection protocol until an occurrence of a first condition, after which said drive ram motion control logic is configured to maintain said drive ram velocity at a value associated with satisfaction of said first condition for a continued execution of said current phase of said injection protocol;
wherein said first condition is satisfied by said medical fluid injector system reaching said target pressure during said current phase of said injection protocol without necessarily reaching a target flow rate for said current phase, and wherein said first condition is also satisfied by said medical fluid injector system reaching said target flow rate without necessarily reaching said target pressure.
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Accused Products
Abstract
A medical fluid injector system (450) is disclosed that may utilize one or more of flow rate determination logic (130), injection volume determination logic (132), display control logic (134), drive ram motion control logic (136), and pressure monitoring logic (138). The flow rate determination logic (130), injection volume determination logic (132), and display control logic (134) each may utilize a concentration input (172, 192, 202) to calculate flow rates, injection volumes, and generate multi-color graphics, respectively, for a simultaneous injection configuration. The drive ram motion control logic (136) may utilize both a target pressure and a monitored pressure to derive a velocity for advancing a drive ram. The pressure monitoring logic (138) may provide a monitored pressure value for the drive ram control logic (136), where this monitored pressure value may be derived from the input power being used to advance a drive ram and the drive ram velocity.
10 Citations
22 Claims
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1. A medical fluid injector system comprising:
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a syringe plunger driver comprising a drive source and a drive ram, wherein said drive source is operable to advance said drive ram in a fluid discharge direction to cause a discharge of a medical fluid from a syringe when incorporated by said medical fluid injector system; and drive ram motion control logic configured to derive a drive ram velocity increase from a target pressure by deriving at least one drive ram velocity increase value, wherein said target pressure is associated with advancement of said drive ram in said fluid discharge direction, and wherein said target pressure is a single value throughout a first time range; wherein said drive ram motion control logic is configured to incrementally increase a drive ram velocity in view of said at least one drive ram velocity increase value during execution of a current phase of an injection protocol until an occurrence of a first condition, after which said drive ram motion control logic is configured to maintain said drive ram velocity at a value associated with satisfaction of said first condition for a continued execution of said current phase of said injection protocol; wherein said first condition is satisfied by said medical fluid injector system reaching said target pressure during said current phase of said injection protocol without necessarily reaching a target flow rate for said current phase, and wherein said first condition is also satisfied by said medical fluid injector system reaching said target flow rate without necessarily reaching said target pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification