Drug delivery methods with tracer
First Claim
1. A method of administering a therapy to an anatomy or delivering a drug to a subject, comprising:
- advancing a convection-enhanced delivery (CED) device having a first fluid lumen and a second fluid lumen into tissue to position an outlet port of the first fluid lumen and an outlet port of the second fluid lumen at a target site within the tissue;
delivering a tracer under positive pressure through the first fluid lumen and into the target tissue to produce a distribution of the tracer within the tissue; and
delivering a fluid containing the drug under positive pressure through the second fluid lumen and into the previously-delivered tracer such that the drug displaces the tracer radially outward to expand the distribution of the tracer; and
visualizing using an imaging technique the radially outward displacement of the tracer resulting from delivery of the fluid containing the drug into the distribution.
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Accused Products
Abstract
Systems and methods for delivering a drug with a tracer or contrast agent are disclosed herein, as are systems and methods that generally involve CED devices with various features for reducing or preventing backflow. In some embodiments, CED devices include a tissue-receiving space disposed proximal to a distal fluid outlet. Tissue can be compressed into or pinched/pinned by the tissue-receiving space as the device is inserted into a target region of a patient, thereby forming a seal that reduces or prevents proximal backflow of fluid ejected from the outlet beyond the tissue-receiving space. In some embodiments, CED devices include a bullet-shaped nose proximal to a distal fluid outlet. The bullet-shaped nose forms a good seal with surrounding tissue and helps reduce or prevent backflow of infused fluid.
212 Citations
32 Claims
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1. A method of administering a therapy to an anatomy or delivering a drug to a subject, comprising:
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advancing a convection-enhanced delivery (CED) device having a first fluid lumen and a second fluid lumen into tissue to position an outlet port of the first fluid lumen and an outlet port of the second fluid lumen at a target site within the tissue; delivering a tracer under positive pressure through the first fluid lumen and into the target tissue to produce a distribution of the tracer within the tissue; and delivering a fluid containing the drug under positive pressure through the second fluid lumen and into the previously-delivered tracer such that the drug displaces the tracer radially outward to expand the distribution of the tracer; and visualizing using an imaging technique the radially outward displacement of the tracer resulting from delivery of the fluid containing the drug into the distribution. - 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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23. A method of administering a therapy to an anatomy or delivering a drug to a subject, comprising:
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advancing a convection-enhanced delivery (CED) device having at least one fluid lumen into tissue to position an outlet port of the at least one fluid lumen at a target site within the tissue; delivering a tracer under positive pressure through the at least one fluid lumen and into the target tissue; and thereafter, delivering a fluid containing the drug under positive pressure through the at least one fluid lumen and into the previously-delivered tracer such that the drug displaces the tracer radially outward to expand the distribution of the tracer; and visualizing using an imaging technique the radially outward displacement of the tracer resulting from delivery of the fluid containing the drug into the distribution. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification