Composition for improving efficiency of drug delivery
First Claim
1. A method of administering a pharmaceutical agent to a tissue by direct convective interstitial infusion, the method comprising:
- placing at least one direct convective interstitial infusion catheter in contact with the tissue;
pressuring said pharmaceutical agent in a liquefied form having a viscosity being X times larger than a viscosity of saline through said at least one direct convective interstitial infusion catheter, wherein said pressuring is characterized by a flow rate selected to induce interstitial convection of said liquefied form, wherein said X is from about 1.04 to about 1.7.
2 Assignments
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Accused Products
Abstract
Method and composition suitable for administering by direct convective interstitial infusion are disclosed. The method comprises: placing at least one direct convective interstitial infusion catheter in contact with the tissue, and pressuring the composition through the catheter. The composition is in a liquefied form having a viscosity above a predetermined value. The predetermined value is selected so as to improve infusion of the compositions into interstitial volumes of the tissue, while minimizing backflow of the compositions along an outer wall of the catheter or leakage into low resistance paths. It is demonstrated that high viscosity results in higher treatment efficiency.
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Citations
44 Claims
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1. A method of administering a pharmaceutical agent to a tissue by direct convective interstitial infusion, the method comprising:
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placing at least one direct convective interstitial infusion catheter in contact with the tissue; pressuring said pharmaceutical agent in a liquefied form having a viscosity being X times larger than a viscosity of saline through said at least one direct convective interstitial infusion catheter, wherein said pressuring is characterized by a flow rate selected to induce interstitial convection of said liquefied form, wherein said X is from about 1.04 to about 1.7. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 41, 42, 43)
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24. A method of administering a pharmaceutical composition to a tissue by direct convective interstitial infusion, the pharmaceutical composition being in a liquid form, the method comprising:
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placing at least one direct convective interstitial infusion catheter in contact with the tissue; increasing a viscosity of the pharmaceutical composition to a viscosity value being X times larger than a viscosity of saline, wherein said X is from about 1.04 to about 1.7; and pressuring the pharmaceutical composition through said at least one direct convective interstitial infusion catheter, wherein said pressuring is characterized by a flow rate selected to induce interstitial convection of said liquid form. - View Dependent Claims (25)
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26. A direct convective interstitial infusion method, comprising:
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providing a pharmaceutical composition which comprises a therapeutic agent and an MRI contrast agent, the pharmaceutical composition being in liquid form and having a viscosity being X times larger than a viscosity of saline, wherein said X is from about 1.04 to about 1.7; pressuring said pharmaceutical composition through at least one direct convective interstitial infusion catheter into an interstitial volume of a tissue, wherein said pressuring is characterized by a flow rate selected to induce interstitial convection of said liquid form; imaging a region containing the tissue by MRI thereby providing at least one image of said region; and using said at least one image for monitoring the convection of said therapeutic agent within the tissue, wherein said monitoring the convection comprises detecting backflow of said pharmaceutical composition along said at least one direct convective interstitial infusion catheter. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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44. A method of administering a pharmaceutical agent to a tissue by direct convective interstitial infusion, the method comprising:
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placing at least one direct convective interstitial infusion catheter in contact with the tissue; pressuring said pharmaceutical agent in a liquefied form having a viscosity which is equal to a viscosity of human serum albumin at a concentration of about 0.2% through said at least one direct convective interstitial infusion catheter, wherein said pressuring is characterized by a flow rate selected to induce interstitial convection of said liquefied form.
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Specification