Power injector with ram retraction
First Claim
1. A method of operation for a medical fluid delivery system comprising a power injector, that in turn comprises a powerhead, first and second syringes, and first and second syringe plunger drivers, the method comprising the steps of:
- executing a programmed retraction sequence, comprising the steps of;
executing a first retracting step comprising retracting said first syringe plunger driver toward a first fully retracted position, wherein said first retracting step further comprises retracting said first syringe plunger driver to a first intermediate position that is reached before said first fully retracted position during retraction of said first syringe plunger driver, wherein said first syringe plunger driver is stopped at said first intermediate position;
executing a second retracting step comprising retracting said second syringe plunger driver toward a second fully retracted position; and
executing a third retracting step comprising retracting said first syringe plunger driver from said first intermediate position to said first fully retracted position;
removing said first syringe from said powerhead after at least part of said first retracting step has been executed; and
removing said second syringe from said powerhead after at least part of said second retracting step has been executed.
6 Assignments
0 Petitions
Accused Products
Abstract
Various embodiments of syringe plunger driver or ram retraction protocols for a power injector are disclosed. In a first ram retraction protocol (184a), a first ram may be partially retracted (232), followed by a full retraction of a second ram (234), followed by a completion of the retraction of the first ram (238). In a second ram retraction protocol (184b), a first ram may be partially retracted (252), followed by a partial retraction of a second ram (254), and sometime thereafter each of the first and second rams may be completely retracted (260, 262). In a third ram retraction protocol (184c), the first and second rams are simultaneously and partially retracted (272), and sometime thereafter each of the first and second rams are completely retracted (276). In a fourth ram retraction protocol (184d), the first and second rams are simultaneously and fully retracted (292) based upon a programmed input or the like.
21 Citations
24 Claims
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1. A method of operation for a medical fluid delivery system comprising a power injector, that in turn comprises a powerhead, first and second syringes, and first and second syringe plunger drivers, the method comprising the steps of:
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executing a programmed retraction sequence, comprising the steps of; executing a first retracting step comprising retracting said first syringe plunger driver toward a first fully retracted position, wherein said first retracting step further comprises retracting said first syringe plunger driver to a first intermediate position that is reached before said first fully retracted position during retraction of said first syringe plunger driver, wherein said first syringe plunger driver is stopped at said first intermediate position; executing a second retracting step comprising retracting said second syringe plunger driver toward a second fully retracted position; and executing a third retracting step comprising retracting said first syringe plunger driver from said first intermediate position to said first fully retracted position; removing said first syringe from said powerhead after at least part of said first retracting step has been executed; and removing said second syringe from said powerhead after at least part of said second retracting step has been executed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operation for a medical fluid delivery system comprising a power injector, that in turn comprises a powerhead, first and second syringes, and first and second syringe plunger drivers, the method comprising the steps of:
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executing a programmed retraction sequence, wherein said programmed retraction sequence is automatically initiated by a programmed input to said power injector, and wherein said executing a programmed retraction sequence step comprises the steps of; executing a first retracting step comprising retracting said first syringe plunger driver toward a first fully retracted position; and executing a second retracting step comprising retracting said second syringe plunger driver toward a second fully retracted position, wherein said first and second retracting steps are simultaneously executed; removing said first syringe from said powerhead after at least part of said first retracting step has been executed; and removing said second syringe from said powerhead after at least part of said second retracting step has been executed. - View Dependent Claims (18, 19)
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20. A method of operation for a medical fluid delivery system comprising a power injector, the method comprising the steps of:
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providing a first option to enable automatic initiation of a syringe plunger driver retraction protocol; providing a second option to enable manual initiation of said syringe plunger driver retraction protocol; selecting one of said first and second options; executing an injection protocol using said power injector; executing said syringe plunger driver retraction protocol in accordance with said selecting step and after said injection protocol has been executed; and removing a first syringe from said power injector after at least part of said syringe plunger driver retraction protocol step has been executed. - View Dependent Claims (21, 22, 23, 24)
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Specification