Chemo-mechanical expansion delivery system
First Claim
1. Apparatus for controlled delivery of a biologically active compound to a biological environment comprising:
- a container comprised of a single member or two mated members, the container defining first and second compartments and comprising pores in at least a portion of the container defining the first compartment,the first compartment containing a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment,the second compartment containing an effective amount of a biologically active compound and including at least one passageway communicating with the biological environment,whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged into the biological environment through the passageway.
6 Assignments
0 Petitions
Accused Products
Abstract
System for delivery of a biologically active substance into an environment. The container is comprised of a single member or two mated members and defines first and second compartments. The container includes pores in at least a portion of the container defining the first compartment. The first compartment contains a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment. The second compartment contains an effective amount of a biologically active compound and may include at least one passageway communicating with the biological environment. Drug delivery is initiated and continues only when the appropriate environmental condition or trigger is met, whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged into the biological environment.
66 Citations
21 Claims
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1. Apparatus for controlled delivery of a biologically active compound to a biological environment comprising:
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a container comprised of a single member or two mated members, the container defining first and second compartments and comprising pores in at least a portion of the container defining the first compartment, the first compartment containing a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment, the second compartment containing an effective amount of a biologically active compound and including at least one passageway communicating with the biological environment, whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged into the biological environment through the passageway. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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2. Apparatus for controlled delivery of a biologically active compound to a biological environment comprising:
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a container comprising pores in at least a portion of the container; a first compartment within the container containing a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment; a second compartment containing an effective amount of a biologically active compound and including at least one passageway communicating with the biological environment, the second compartment disposed within the first compartment; whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged into the biological environment through the passageway.
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3. Apparatus for controlled delivery of a biologically active compound to a biological environment comprising:
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a container comprising pores in at least a portion of the container; a first compartment within the container containing a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment; a second compartment containing an effective amount of a biologically active compound in communication with the biological environment through the pores, the first compartment disposed within the second compartment; whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged through the pores of the container into the biological environment through the passageway.
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4. Apparatus for controlled delivery of a biologically active compound to a biological environment comprising:
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a container comprised of a single member or two mated and comprising pores in at least a portion of the container, the container defining a space housing; upper and lower compartments containing a polymer gel network which undergoes a volume expansion in response to an environmental condition which varies in the biological environment, the upper and lower compartment in communication with the biological environment through the container pores; and an inner compartment containing an effective amount of a biologically active compound and including at least one passageway communicating with the biological environment, whereupon volume expansion of the polymer gel network causes the biologically active compound to be discharged into the biological environment through the passageway.
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Specification