Therapeutic delivery systems related applications
First Claim
Patent Images
1. An apparatus for making therapeutic containing liposomes filled with a gaseous precursor, comprising:
- a) a vessel;
b) means for introducing an aqueous solution comprising a lipid and a therapeutic compound into said vessel;
c) means for introducing a gaseous precursor into said vessel;
d) means for instilling said gaseous precursor into said aqueous solution in said vessel; and
e) cooling means for cooling said aqueous solution below the gel to liquid crystalline phase transition temperature of said lipid in said aqueous solution and for maintaining said gaseous precursor in said vessel at a temperature below its liquid to gas phrase transition temperature during said instillation of said gaseous precursor into said aqueous solution, thereby producing a foam containing gaseous precursor-filled liposomes within said vessel.
15 Assignments
0 Petitions
Accused Products
Abstract
Therapeutic delivery systems comprising gaseous precursor-filled microspheres comprising a therapeutic are described. Methods for employing such microspheres in therapeutic delivery applications are also provided. Therapeutic delivery systems comprising gaseous precursor-filled liposomes having encapsulated therein a contrast agent or drug are preferred. Methods of and apparatus for preparing such liposomes and methods for employing such liposomes in therapeutic delivery applications are also disclosed.
-
Citations
36 Claims
-
1. An apparatus for making therapeutic containing liposomes filled with a gaseous precursor, comprising:
-
a) a vessel; b) means for introducing an aqueous solution comprising a lipid and a therapeutic compound into said vessel; c) means for introducing a gaseous precursor into said vessel; d) means for instilling said gaseous precursor into said aqueous solution in said vessel; and e) cooling means for cooling said aqueous solution below the gel to liquid crystalline phase transition temperature of said lipid in said aqueous solution and for maintaining said gaseous precursor in said vessel at a temperature below its liquid to gas phrase transition temperature during said instillation of said gaseous precursor into said aqueous solution, thereby producing a foam containing gaseous precursor-filled liposomes within said vessel. - 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, 24, 25, 26, 27)
-
-
28. An apparatus for making therapeutic containing gas-filled liposomes, comprising:
-
a) a vessel; b) means for introducing an aqueous solution comprising a lipid and a therapeutic compound into said vessel; c) means for introducing a gaseous precursor into said vessel; d) means for instilling said gaseous precursor into said aqueous solution in said vessel, thereby producing a foam containing gaseous precursor-filled liposomes within said vessel; and e) means for extracting said foam from said vessel, said means for extracting said foam from said vessel having means for adjusting the vertical location at which said foam is extracted from said vessel so as to regulate the size of said liposomes extracted. - View Dependent Claims (29, 30, 31, 32)
-
-
33. An apparatus for making therapeutic containing gas-filled liposomes, comprising:
-
a) a vessel; b) means for introducing an aqueous solution comprising a lipid and a therapeutic compound into said vessel; c) means for introducing a gaseous precursor into said vessel; d) means for instilling said gaseous precursor into said aqueous solution in said vessel, thereby producing a foam containing gaseous precursor-filled liposomes within said vessel; and e) means for sizing said liposomes, said sizing means including a syringe having (i) a barrel portion for receiving said liposomes, (ii) a needle portion, (iii) a filter disposed between said barrel and said needle, and (iv) a plunger for extruding said liposomes through said filter. - View Dependent Claims (34)
-
-
35. An apparatus for making therapeutic containing gas-filled liposomes, comprising:
-
a) means for instilling a gaseous precursor into an aqueous solution comprising a lipid and a therapeutic compound, thereby forming a foam containing gaseous precursor-filled liposomes; b) means for sizing said liposomes, said sizing means including a syringe having (i) a barrel portion, said barrel portion of said syringe forming a vessel in which said liposomes are formed, (ii) a needle portion, (iii) a filter disposed between said barrel and said needle, and (iv) a plunger for extruding said liposomes through said filter, whereby said liposomes are sized as they are injected into a patient; c) means for introducing said gaseous precursor into said barrel portion of said syringe; and d) means for introducing said aqueous solution into said barrel portion of said syringe.
-
-
36. An apparatus for making gaseous precursor filled liposomes coated with a therapeutic, comprising:
-
a) a vessel; b) means for sequentially introducing an aqueous solution comprising a lipid into said vessel and then introducing a therapeutic compound into said vessel; c) means for introducing a gaseous precursor into said vessel prior to said introduction of said therapeutic compound; and d) means for instilling said gaseous precursor into said aqueous solution in said vessel prior to said introduction of said therapeutic compound, thereby forming gaseous precursor filled liposomes; whereby said therapeutic compound introducing means introduces said therapeutic compound into said vessel after said formation of said gaseous precursor filled liposomes so that said therapeutic compound coats said gaseous precursor filled liposomes.
-
Specification