Angiographic injector and injection method
First Claim
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1. A method for automatically refilling a syringe for a powered angiographic injector arrangement, said method comprising:
- providing a fluid reservoir in communication with a chamber of said syringe;
completing a first injection via the powered angiographic injector arrangement;
wherein the powered angiographic injector arrangement;
senses a volume of fluid remaining in the chamber of the syringe following the first injection;
receives a user input associated with a subsequent injection, the user input comprising a safety parameter for the subsequent injection selected from the group consisting of maximum injection volume, maximum flow rate, maximum pressure, and rise time;
determines a preset volume of fluid necessary for the subsequent injection based on the user input;
compares said volume remaining in said chamber with said preset volume of fluid; and
either(a) advances a plunger within said chamber of said syringe to perform the subsequent injection if said preset volume of fluid is equal to or less than the volume of fluid remaining in said chamber, or(b) automatically retracts a plunger to a predetermined position within said chamber of said syringe to draw fluid from the fluid reservoir into the chamber is said preset volume of fluid is greater than the volume of fluid remaining in said chamber.
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Abstract
An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure monitoring, saline flushing, or aspirating functions. When an injection is to be made, the valve automatically switches so that the low pressure system is disconnected and not exposed to high pressure, while the syringe pump is connected through the manifold to the catheter.
121 Citations
18 Claims
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1. A method for automatically refilling a syringe for a powered angiographic injector arrangement, said method comprising:
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providing a fluid reservoir in communication with a chamber of said syringe; completing a first injection via the powered angiographic injector arrangement; wherein the powered angiographic injector arrangement; senses a volume of fluid remaining in the chamber of the syringe following the first injection; receives a user input associated with a subsequent injection, the user input comprising a safety parameter for the subsequent injection selected from the group consisting of maximum injection volume, maximum flow rate, maximum pressure, and rise time; determines a preset volume of fluid necessary for the subsequent injection based on the user input; compares said volume remaining in said chamber with said preset volume of fluid; and
either(a) advances a plunger within said chamber of said syringe to perform the subsequent injection if said preset volume of fluid is equal to or less than the volume of fluid remaining in said chamber, or (b) automatically retracts a plunger to a predetermined position within said chamber of said syringe to draw fluid from the fluid reservoir into the chamber is said preset volume of fluid is greater than the volume of fluid remaining in said chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for automatically refilling a syringe for a powered injector arrangement, said method comprising:
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sensing a volume of fluid in a chamber of said syringe following an injection via said powered injector arrangement; providing a fluid reservoir in communication with said chamber; wherein the powered angiographic injector arrangement; receives a user input associated with a subsequent injection via said powered injector arrangement, the user input comprising a safety parameter for the subsequent injection selected from the group consisting of maximum injection volume, maximum flow rate, maximum pressure, and rise time; determines a preset amount of fluid necessary for the subsequent injection based on the user input; compares said volume in said chamber with said preset amount of fluid; and
either(a) advances a plunger within said chamber of said syringe to perform the subsequent injection if said preset amount of fluid is equal to or less than the volume of fluid sensed in said chamber, or (b) retracts a plunger to a predetermined position within said chamber of said syringe to draw fluid from the fluid reservoir into the chamber is said preset amount of fluid is greater than the volume of fluid sensed in said chamber. - View Dependent Claims (15, 16, 17, 18)
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Specification