Patency check with pressure monitoring
First Claim
1. A power injector, comprising:
- a powerhead;
a syringe plunger drive assembly;
patency check logic configured to execute a patency check injection to assess for both blockage in a flowpath to a patient'"'"'s vein and existence of an extravasation condition where fluid is being introduced into a patient'"'"'s tissue instead of a vein, wherein said patency check logic comprises a pressure standard;
pressure monitoring logic, wherein an output from said pressure monitoring logic is provided to said patency check logic for comparison with said pressure standard, wherein said patency check logic is configured to identify an existence of a first condition, wherein said first condition is either when a monitored pressure during a patency check injection reaches or exceeds a pressure threshold, or when a monitored pressure during a patency check injection deviates from a target pressure curve by more than a certain amount; and
injection protocol logic, separate from said patency check logic, configured to execute an injection protocol after said patency check logic executes a patency check injection, wherein said injection protocol logic comprises a comparator, wherein a first input to said comparator comprises a pressure from a patency check injection when said patency check logic failed to identify an occurrence of said first condition, and wherein a second input to said comparator comprises a monitored pressure during a subsequent execution of an injection protocol.
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Accused Products
Abstract
A patency check protocol (150) for evaluating a patency check injection (156) is disclosed. The protocol (150) incorporates a pressure standard (152) (e.g., a pressure threshold; a target pressure curve). A pressure associated with the patency check injection is monitored (160) and compared against this pressure standard (164). If a first condition is identified (166) (e.g., if the pressure threshold is reached; if the monitored pressure deviates from the target pressure curve by more than a certain predetermined amount), one or more actions may be undertaken (168) (e.g., one or more notifications or alerts may be issued; the flow rate may be reduced for the patency check injection; the patency check injection may be suspended/terminated).
51 Citations
22 Claims
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1. A power injector, comprising:
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a powerhead; a syringe plunger drive assembly; patency check logic configured to execute a patency check injection to assess for both blockage in a flowpath to a patient'"'"'s vein and existence of an extravasation condition where fluid is being introduced into a patient'"'"'s tissue instead of a vein, wherein said patency check logic comprises a pressure standard; pressure monitoring logic, wherein an output from said pressure monitoring logic is provided to said patency check logic for comparison with said pressure standard, wherein said patency check logic is configured to identify an existence of a first condition, wherein said first condition is either when a monitored pressure during a patency check injection reaches or exceeds a pressure threshold, or when a monitored pressure during a patency check injection deviates from a target pressure curve by more than a certain amount; and injection protocol logic, separate from said patency check logic, configured to execute an injection protocol after said patency check logic executes a patency check injection, wherein said injection protocol logic comprises a comparator, wherein a first input to said comparator comprises a pressure from a patency check injection when said patency check logic failed to identify an occurrence of said first condition, and wherein a second input to said comparator comprises a monitored pressure during a subsequent execution of an injection protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for executing a first medical procedure, comprising the steps of:
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fluidly interconnecting a patient with a power injector; injecting a first fluid into said patient using said power injector, wherein said first fluid is an initial fluid injected into said patient by said power injector for said first medical procedure; monitoring said injecting a first fluid step for an occurrence of a first condition, wherein said first condition is either when a pressure during said injecting a first fluid step reaches or exceeds a pressure threshold, or when a pressure during said injecting a first fluid step deviates from a target pressure curve by more than a certain amount; assessing for both blockage in a flowpath to said patient and existence of an extravasation condition where fluid is being introduced into said patient'"'"'s tissue instead of a vein, said assessing step comprising comparing an output of said monitoring step for said first fluid with a first standard, wherein said comparing step is executed by power injector control logic; injecting a second fluid into said patient using said power injector, wherein said injecting a second fluid step is executed after said injecting a first fluid step; and monitoring said injecting a second fluid step, comprising comparing a pressure from said injecting a second fluid step with a pressure from said injecting a first fluid step when said monitoring step for said first fluid failed to identify an occurrence of said first condition.
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22. A power injector, comprising:
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a powerhead; a syringe plunger drive assembly; patency check logic configured to execute a patency check injection to assess for both blockage in a flowpath to a patient'"'"'s vein and existence of an extravasation condition where fluid is being introduced into a patient'"'"'s tissue instead of a vein, wherein said patency check logic comprises a pressure standard; injection protocol logic, separate from said patency check logic, configured to execute an injection protocol after said patency check logic executes a patency check injection; and pressure monitoring logic, wherein an output from said pressure monitoring logic is used by both said patency check logic and said injection protocol logic.
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Specification