Methods and apparatus for drug delivery involving phase changing formulations
First Claim
1. A method of anesthetizing a human body surface comprising the steps of:
- applying a formulation to a human body surface, said formulation comprising;
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
controlling the delivery of said local anesthetic into said human body surface by controlling the evaporation time of said evaporable solvent and conversion of said formulation into said peelable coherent, solid phase, wherein said local anesthetic is delivered into said human body surface at a determined and calculated rate sufficient to anesthetize said human body surface during evaporation of said evaporable solvent, said local anesthetic delivery continuing until and is completed upon the substantial evaporation of said evaporable solvent and conversion of said formulation into said coherent solid phase.
10 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to an apparatus and method of drug delivery on a human body surface. The formulation comprises a drug, a conversion agent capable of converting the formulation from a less solid phase to a coherent, soft, solid phase, and a vehicle medium or carrier for the drug and conversion agent. The drug formulation is applied to this human body surface in its less than solid phase and is subsequently converted to a soft solid phase while the drug is being delivered through the human body surface. After delivery of the drug is complete, the soft solid formulation can be removed or peeled from the body surface as a coherent solid formulation. The drug formulation provides control over drug delivery rates and allows the formulation to be removed without leaving a messy, residual formulation on the body surface.
105 Citations
85 Claims
-
1. A method of anesthetizing a human body surface comprising the steps of:
-
applying a formulation to a human body surface, said formulation comprising;
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
controlling the delivery of said local anesthetic into said human body surface by controlling the evaporation time of said evaporable solvent and conversion of said formulation into said peelable coherent, solid phase, wherein said local anesthetic is delivered into said human body surface at a determined and calculated rate sufficient to anesthetize said human body surface during evaporation of said evaporable solvent, said local anesthetic delivery continuing until and is completed upon the substantial evaporation of said evaporable solvent and conversion of said formulation into said coherent solid phase. - 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, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
-
-
46. The method of 1, wherein said transformation is triggered by placing a patch capable of generating heat onto said formulation on said human body surface.
-
47. The method of 46, the heat of said patch is generated by an exothermic reaction.
-
48. A method of 1, wherein said transformation significantly reduces the rate of drug delivery.
-
49. A method of 1, wherein said transformation substantially terminates drug delivery upon completion of said conversion.
-
50. A method of 1, wherein said transformation prevents over dosing.
-
51. A method of anesthetizing a human body surface comprising the steps of:
-
applying a formulation to a human body surface, said formulation comprising;
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
delivering of said local anesthetic into said human body surface at sufficient rates that the anesthetizing of said human body surface is achieved during the evaporation of said evaporable solvent;
said evaporable solvent and said formulation having such a property that the complete evaporation of said evaporable solvent from said formulation substantially stops the delivery of said local anesthetic into said human body surface.- View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
-
-
66. A method of anesthetizing a human body surface comprising applying a formulation to a human body surface, said formulation comprising:
-
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase; and
a vehicle medium comprising an evaporable solvent;
said formulation converting to said coherent, solid phase after said formulation is applied to said human body surface by evaporation of said evaporable solvent from said formulation;
said formulation delivering said local anesthetic into said human body surface during the evaporation of said evaporable solvent and having sufficient delivery rate of said local anesthetic into said human body surface such that the anesthetizing of said human body surface is achieved during the evaporation of said evaporable solvent.- View Dependent Claims (67, 68, 69, 70, 71)
-
-
72. A method of anesthetizing a human body surface comprising the steps of applying a formulation to a human body surface, said formulation comprising:
-
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by the evaporation of said evaporable solvent from said formulation; and
delivering said local anesthetic into said human body surface at sufficient rates such that the anesthetizing of said human body surface is achieved during the evaporation of said evaporable solvent. - View Dependent Claims (73, 74, 81)
-
-
75. A method of anesthetizing a human body surface comprising applying a formulation to a human body surface, said formulation comprising:
-
a local anesthetic;
a conversion agent to facilitate a transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
said formulation converting to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
said formulation delivering said local anesthetic into said human body surface at sufficient rates that the anesthetizing of said human body surface is achieved during the evaporation of said evaporable solvent and is substantially completed upon the conversion of said formulation into said coherent, solid phase.- View Dependent Claims (82)
-
-
76. A paste formulation for delivering local anesthetic into a human body surface comprising:
-
a local anesthetic;
a conversion agent to facilitate the transformation of said formulation from an initial paste phase to a peelable coherent, solid phase; and
an evaporable solvent;
the presence of said solvent being necessary in order for said formulation to deliver said local anesthetic into normal human skin at sufficient rates capable of anesthetizing a normal human within sixty minutes.- View Dependent Claims (77, 78, 83)
-
-
79. A method of anesthetizing a human body surface comprising the steps of:
-
applying a formulation to a human body surface, said formulation comprising;
a local anesthetic;
a conversion agent to facilitate the transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising an evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
delivering said local anesthetic into said human body surfaced at such rates so that the anesthetizing of said human body surface and conversion of said formulation into said solid phase take place within a short time from each other;
said solvent having a property that the complete evaporation of it from the formulation substantially stops the delivering of said local anesthetic into said human body surface.- View Dependent Claims (84)
-
-
80. A method of anesthetizing a human body surface comprising the steps of:
-
applying a formulation to a human body surface, said formulation comprising;
a local anesthetic;
a conversion agent to facilitate the transformation of said formulation from an initial liquid phase to a peelable coherent, solid phase;
a vehicle medium comprising and evaporable solvent;
converting said formulation to said coherent, solid phase after said formulation is applied to said human body surface by evaporating said evaporable solvent from said formulation; and
delivery of said local anesthetic into said human body surface by evaporating said evaporable solvent and conversing of said formulation into said peelable coherent, solid phase, wherein said local anesthetic is delivered into said human body surface in the liquid phase sufficient to anesthetize said human body surface during evaporation of said evaporable solvent, said local anesthetic delivery continuing until substantial evaporation of said evaporable solvent. - View Dependent Claims (85)
-
Specification