Radioactive embolizing compositions
First Claim
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1. A composition suitable for treating a solid mass tumor in a mammal which composition comprises:
- (a) a non-crosslinked, biocompatible, non-biodegradable polymer which polymer is insoluble in blood;
(b) a biocompatible solvent which is an organic material liquid at least at body temperature of the mammal and which solubilizes said polymer with the proviso that when said solvent comprises water, the amount of water employed is sufficiently small that the dissolved polymer precipitates upon contact with the blood; and
(c) from about 0.1 to about 25 weight percent of a water insoluble radioisotope having from a radioactive content of from about 0.5 microcurie to about 100 millicuries with the proviso that when theradioisotope is either water soluble or water reactable, said isotope is used as a water insoluble salt.
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Abstract
Disclosed are novel radioactive compositions which are particularly suited for treating solid mass tumors via catheter delivery.
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Citations
23 Claims
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1. A composition suitable for treating a solid mass tumor in a mammal which composition comprises:
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(a) a non-crosslinked, biocompatible, non-biodegradable polymer which polymer is insoluble in blood; (b) a biocompatible solvent which is an organic material liquid at least at body temperature of the mammal and which solubilizes said polymer with the proviso that when said solvent comprises water, the amount of water employed is sufficiently small that the dissolved polymer precipitates upon contact with the blood; and (c) from about 0.1 to about 25 weight percent of a water insoluble radioisotope having from a radioactive content of from about 0.5 microcurie to about 100 millicuries with the proviso that when theradioisotope is either water soluble or water reactable, said isotope is used as a water insoluble salt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for embolizing a blood vessel leading to or in a solid mass tumor in a mammal and causing necrosis to a portion of said solid mass tumor which method comprises:
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(a) identifying a blood vessel in said mammal which leads to or is in the solid mass tumor; (b) injecting a sufficient amount of an embolic composition comprising; (i) a non-crosslinked, biocompatible, non-biodegradable polymer which polymer is insoluble in blood; (ii) a biocompatible solvent which is an organic material liquid at least at body temperature of the mammal and which solubilizes said polymer with the proviso that when said solvent comprises water, the amount of water employed is sufficiently small that the dissolved polymer precipitates upon contact with the blood; and (iii) from about 0.1 to about 25 weight percent of a water insoluble radioiotope having from a radioactive content of from about 0.5 microcurie to about 100 millicuries with the proviso that when the radioisotope is either water soluble or water reactable, said isotope is used as a water insoluble salt into said blood vessel under conditions wherein a precipitate is formed which embolizes the blood vessel and further wherein the radioisotope is employed in an amount effective to cause necrosis of at least a portion of said tumor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for causing necrosis to a portion of a solid mass tumor which method comprises:
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(a) identifying a solid mass tumor in a mammal; (b) injecting a sufficient amount of an embolic composition comprising; (i) a non-crosslinked, biocompatible, non-biodegradable polymer which polymer is insoluble in blood; (ii) a biocompatible solvent which is an organic material liquid at least at body temperature of the mammal and which solubilizes said polymer with the proviso that when said solvent comprises water, the amount of water employed is sufficiently small that the dissolved polymer precipitates upon contact with the blood; and (iii) from about 0.1 to about 25 weight percent of a water insoluble radioisotope having from a radioactive content of from about 0.5 microcurie to about 100 millicuries with the proviso that when the radioisotope is either water soluble or water reactable, said isotope is used as a water insoluble salt into said tumor under conditions wherein a precipitate is formed wherein the radioisotope is employed in an amount effective to cause necrosis of at least a portion of said tumor.
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Specification