Thrombolytic agents and methods of treatment for thrombosis
First Claim
1. A method of treating thrombosis in animals comprising the steps of:
- introducing a solution consisting essentially of a mixture of dextrose and albumin wherein said destrose comprises from about 3.75% to about 40% by weight of said solution to said animal by intravenous injection near a thrombus site and thereafter applying ultrasound to said site, said dextrose and albumin mixture comprising a plurality of microbubbles with a diameter of from about 0.1 to 10 microns,said microbubbles having a protein coated shell and an internal atmosphere comprising a gas which is insoluble in blood.
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Abstract
The foregoing invention relates to a new microbubble preparation and thrombolytic therapy which relies on microbubbles and ultrasound for its lytic activity. The pharmaceutical composition of the invention comprises a liquid solution of microbubbles with an internal atmosphere enhanced with the perfluorocarbon gas which cavitate in the presence of an ultrasound field following intravenous injection or infusion of said composition into said host. For thrombolysis the area of a thrombus is exposed to an ultrasound field in the presence of the microbubbles and significant lysis is experienced. The method and pharmaceutical composition of the invention exhibit thrombolytic properties similar to those of other thrombolytic agents such as urokinase and are less toxic and are clot specific in that they do not introduce a systemic lytic state to a said animal.
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Citations
17 Claims
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1. A method of treating thrombosis in animals comprising the steps of:
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introducing a solution consisting essentially of a mixture of dextrose and albumin wherein said destrose comprises from about 3.75% to about 40% by weight of said solution to said animal by intravenous injection near a thrombus site and thereafter applying ultrasound to said site, said dextrose and albumin mixture comprising a plurality of microbubbles with a diameter of from about 0.1 to 10 microns, said microbubbles having a protein coated shell and an internal atmosphere comprising a gas which is insoluble in blood. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for treating thrombosis in animals comprising:
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(a) obtaining a pharmaceutical composition which consists essentially of; (i) an aqueous albumin-dextrose solution containing between about a two fold and about an eight fold dilution of about a 5% by weight solution of dextrose and between about 2% to about 10% by weight human serum albumin; and (ii) microbubbles, having a protein coated shell and a gaseous content of which contain an amount of perfluorocarbon gas effective for achieving a stable concentration of about 5×
108 microspheres per ml;(b) introducing said pharmaceutical composition to said thrombus; and (c) exposing said microbubbles and said thrombus to an ultrasound field for a time sufficient to lyse said thrombus. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification