Fluid driven medical injectors
First Claim
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1. A medical fluid injector for use in an MRI procedure, comprising:
- an external pneumatic source;
a powerhead comprising a substantially non-ferrous and substantially non-magnetic multi-fluid drive, wherein the multi-fluid drive comprises a pneumatic drive section coupled to a liquid control section, wherein the pneumatic drive section is responsive to pressure of a working pneumatic medium to induce movement, the liquid control section comprises a working liquid responsive to the movement to control a rate of the movement, wherein the multi-fluid drive is configured to not interfere with magnetic resonance imaging, wherein the pneumatic drive section comprises a first pneumatic supply, and wherein the liquid control section is located between the pneumatic drive section and a delivery device when the delivery device is installed on the injector; and
a docking recharge station, wherein the powerhead is configured to mate with the docking recharge station, wherein the docking recharge station comprises a second pneumatic supply, and wherein the external pneumatic source is connectable with each of the first and second pneumatic supplies.
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Abstract
Some injectors of the invention may include a fluid drive responsive to pressure of a working fluid (e.g., liquid, pneumatic, or both) to impart a sequence of forces to drive a delivery device (e.g., a syringe) to deliver a medical fluid (e.g., a contrast agent, a radiopharmaceutical, a drug, or a combination thereof). Some injectors may include a multimedia tube configured to pass a working fluid (e.g., air) and a light signal (e.g., infrared). Some injectors may include a peristaltic drive responsive to pressure of a working fluid.
26 Citations
19 Claims
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1. A medical fluid injector for use in an MRI procedure, comprising:
- an external pneumatic source;
a powerhead comprising a substantially non-ferrous and substantially non-magnetic multi-fluid drive, wherein the multi-fluid drive comprises a pneumatic drive section coupled to a liquid control section, wherein the pneumatic drive section is responsive to pressure of a working pneumatic medium to induce movement, the liquid control section comprises a working liquid responsive to the movement to control a rate of the movement, wherein the multi-fluid drive is configured to not interfere with magnetic resonance imaging, wherein the pneumatic drive section comprises a first pneumatic supply, and wherein the liquid control section is located between the pneumatic drive section and a delivery device when the delivery device is installed on the injector; and
a docking recharge station, wherein the powerhead is configured to mate with the docking recharge station, wherein the docking recharge station comprises a second pneumatic supply, and wherein the external pneumatic source is connectable with each of the first and second pneumatic supplies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- an external pneumatic source;
Specification