Remotely controlled substance delivery device

• US 7,942,867 B2
• Filed: 01/18/2006
• Issued: 05/17/2011
• Est. Priority Date: 11/09/2005
• Status: Active Grant

• Current Assignee: Gearbox LLC (Intellectual Ventures LLC)
• Original Assignee: The Invention Science Fund I, L.L.C. (Intellectual Ventures LLC)
• Inventors: Wood, Victoria Y. H., Ishikawa, Muriel Y., Hood, Leroy E., Tegreene, Clarence T., Langer, Robert, Wood, Lowell L. Jr., Jung, Edward K. Y.
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): FLICK, JASON E
• Application Number:
  US11/335,785
• Publication Number:
  US 20070106269A1
• Time in Patent Office: 1,945 Days
• Field of Search: 604/890.1
• US Class Current: 604/890.1
• CPC Class Codes: A61K 9/0009 involving or responsive to electricity, magnetism or acoustic waves; Galenical aspects of sonophoresis, iontophoresis, electroporation or electroosmosis microelectromechanical systems A61K9/0097
• CPC Class Codes: A61M 2005/14513 with secondary fluid driving or regulating the infusion
• CPC Class Codes: A61M 2205/0266 Shape memory materials
• CPC Class Codes: A61M 2205/0288 Electro-rheological or magneto-rheological materials
• CPC Class Codes: A61M 2205/3523 using telemetric means
• CPC Class Codes: A61M 2205/3569 sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/36 related to heating or cooling
• CPC Class Codes: A61M 31/002 Devices for releasing a drug at a continuous and controlled rate for a prolonged period of time artificial gland structures or devices A61F2/022; intra-uterine contraceptive devices A61F6/14; tampons for introducing into the vagina A61F13/20, A61L15/00; suppositories or bougies for intra-vaginal or intra-uterine application A61K9/02; physical forms of medicinal preparations for sustained or differential drug release A61K9/20, A61K9/50
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00

Abstract

Embodiments of a system including a remotely controlled substance delivery device and associated controller are described. Methods of use and control of the device are also disclosed. According to some embodiments, a delivery device or related device may be placed in an environment in order to pump a material into the environment or into an additional fluid handling structure within the device. Exemplary environments include a body of an organism, a body of water, or an enclosed volume of a fluid. The concentration of a substance in the fluid to be delivered may be modified by a remote control signal. In selected embodiments, a magnetic field, an electric field, or electromagnetic control signal may be used.

Claims

1. A delivery device comprising:

a delivery reservoir configured to contain a delivery fluid, the delivery reservoir having at least one outlet through which the delivery fluid may exit the delivery reservoir;

a delivery fluid contained within the delivery reservoir;

a primary material contained within the delivery reservoir and having a controllable effective concentration in the delivery fluid; and

at least one electromagnetically responsive control element located in the delivery reservoir or in a wall of the delivery reservoir and adapted for modifying the distribution of the primary material between a first active form carried in the delivery fluid and a second form within the delivery reservoir in response to an incident electromagnetic control signal, the effective concentration being the concentration of the first active form in the delivery fluid, whereby delivery fluid exiting the delivery reservoir carries the primary material in the first active form at the effective concentration.

2. The delivery device of claim 1, wherein the at least one electromagnetically responsive control element is configured to selectively respond to an electromagnetic field having a specific frequency and orientation.

3. The delivery device of claim 1, wherein the at least one electromagnetically responsive control element is a shape-changing structure that changes in at least one dimension in response to an electromagnetic control signal.

4. The delivery device of claim 3, wherein the change in at least one dimension includes an expansion or contraction in at least one dimension, and wherein the expansion or contraction exposes molecular structures to the delivery fluid that modify the solubility of the primary material in the delivery fluid.

5. The delivery device of claim 4, wherein the molecular structures modify the pH of at least a portion of the delivery fluid;

the molecular structures modify the polarity of at least a portion of the delivery fluid;

or the molecular structures are interaction sites for the primary material, whereby primary material bound by the interaction sites is removed from the delivery fluid.

6. The delivery device of claim 1, including a power receiving structure.

7. The delivery device of claim 6, wherein the power receiving structure includes an antenna or a resonant structure.

8. The delivery device of claim 7, wherein the power receiving structure is a resonant structure selected from a resonant circuit, a molecular bond, or a mechanically resonant structure.

9. The delivery device of claim 1, including at least one interaction region capable of interacting with the primary material by one or more of binding, reacting, interacting, or forming a complex with the primary material.

10. The delivery device of claim 9, wherein the at least one interaction region is responsive to the electromagnetic control signal by a change in at least one characteristic, the change in the at least one characteristic modifying the interaction between the at least one interaction region and the primary material.

11. The delivery device of claim 10, wherein the at least one characteristic includes at least one solubility, reactivity, temperature, conformation, orientation, alignment, binding affinity, chemical potential, surface energy, porosity, osmolality, pH, distribution within the delivery reservoir, or density.

12. The delivery device of claim 9, wherein at least a portion of the delivery reservoir containing the at least one interaction region is responsive to the incident electromagnetic control signal by a change in the surface area of the portion of the delivery reservoir produced by one or more of stretching or expansion of the portion of the delivery reservoir or unfolding of the portion of the delivery reservoir, the change in surface area modifying the likelihood of interaction of the primary material with the at least one interaction region.

13. The delivery device of claim 1, wherein the first active form is carried in solution, suspension, emulsion, or colloidal dispersion in the delivery fluid.

14. The delivery device of claim 1, wherein the second form is one of a chemically inactive form of the primary material carried in the delivery fluid or a chemically active form of the primary material contained in a carrier structure carried in the delivery fluid.

15. The delivery device of claim 1, wherein the second form is an inactive form of the primary material carried in solution, suspension, emulsion, or colloidal dispersion in the delivery fluid.

16. The delivery device of claim 1, wherein the second form is insoluble in the delivery fluid or precipitated out of the delivery fluid.

17. The delivery device of claim 1, wherein the at least one electromagnetically responsive control element is an electromagnetic field responsive molecule in the delivery fluid, wherein the electromagnetic field responsive molecule undergoes a change in conformation from a first conformation state to a second conformation state in response to the electromagnetic control signal, wherein the first conformation state has a first solubility in the delivery fluid and the second conformation state has a second solubility in the delivery fluid, and wherein the electromagnetic field responsive molecule forms at least a portion of one of the primary material in the delivery fluid or a secondary material that influences the solubility of the primary material in the delivery fluid.

18. The delivery device of claim 1, wherein the at least one electromagnetically responsive control element includes at least one permanently magnetizable material, ferromagnetic material, ferrimagnetic material, ferrous material, ferric material, dielectric material, ferroelectric material, piezoelectric material, diamagnetic material, paramagnetic material, metallic material, or antiferromagnetic material, shape memory material, shape memory polymer, a shape memory metal, bimetallic structure, polymer, ceramic, metal, hydrogel, ferrogel, or combination of a polymer and a magnetically or electrically active component.

19. The delivery device of claim 1, wherein the at least one electromagnetically responsive control element includes one of an electromagnetic field responsive heating element or an electromagnetic field responsive cooling element.

20. The delivery device of claim 1, wherein the primary material has a different immunogenicity, different reactivity, or different stability when it is in the first active form than in the second form.

21. The delivery device of claim 1, wherein the primary material includes at least one pharmaceutical material;

neutraceutical material;

biologically active material;

nutrient;

hormone;

growth factor;

medication;

therapeutic compound;

enzyme;

genetic material;

vaccine;

vitamin;

neurotransmitter;

cytokine;

cell-signaling material;

pro- or anti-apoptotic agent;

imaging agent;

labeling agent;

diagnostic compound;

nanomaterial;

inhibitor;

blocker;

component or precursor of a biologically active material;

component or precursor of a nutrient, hormone, growth factor, medication, therapeutic compound, enzyme, genetic material, vaccine, vitamin, neurotransmitter, cytokine, cell-signaling material, pro- or anti-apoptotic agent, imaging agent, labeling agent, diagnostic compound, nanomaterial, inhibitor, or blocker;

fertilizer;

nutrient;

remediation agent;

antibiotic;

microbicide;

herbicide;

fungicide;

transfection agent;

nanomaterial;

disinfectant;

metal salt;

buffer;

acid;

base;

chelating agent;

emulsifying agent;

surfactant;

tissue-specific marker;

targeting molecule;

or tissue-specific endothelial protein.

22. The delivery device of claim 1, including at least one of an electromagnetic control signal generator or an RFID.

23. The delivery device of claim 1, including a body structure adapted for positioning in an environment selected from a body of an organism, body of water, contained fluid volume, industrial fluid volume, agricultural fluid volume, swimming pool, aquarium, drinking water supply, potable water supply, or HVAC system cooling water supply.

24. The delivery device of claim 1, including at least one sensor for detecting at least one parameter from the delivery reservoir or at least one parameter from at least a portion of an environment surrounding the delivery device.

25. A delivery device comprising:

a fluid-containing structure having at least one outlet through which a fluid may exit the fluid-containing structure to a downstream location;

a delivery fluid contained within the fluid-containing structure;

a primary material contained within the fluid-containing structure and having a controllable effective concentration in the delivery fluid;

at least one electromagnetically responsive control element located in the fluid-containing structure or in a wall of the fluid-containing structure and adapted for modifying the distribution of the primary material between a first active form carried in the delivery fluid and a second form within the fluid containing structure in response to an incident electromagnetic control signal, the effective concentration being the concentration of the first active form in the delivery fluid, whereby delivery fluid exiting the delivery reservoir carries the primary material in the first active form at the effective concentration; and

a pump configured for pumping delivery fluid carrying the first active form of the primary material at the effective concentration from the fluid-containing structure to the downstream location.

26. The delivery device of claim 25, wherein the pump includes an osmotic pump, mechanical pump, displacement pump, centrifugal pump, or peristaltic pump.

27. The delivery device of claim 25, wherein the downstream location includes at least one of the environment, a downstream environmental interface, or a downstream fluid handling structure.

28. The delivery device of claim 27, including a downstream fluid handling structure including at least one channel, chamber, mixer, splitter, or filter.

29. A method of delivering a fluid, comprising:

receiving an electromagnetic control signal from a remote controller; and

responsive to the electromagnetic control signal, activating an electromagnetically responsive control element in a delivery reservoir or in the wall of a delivery reservoir to modify an effective concentration of a primary material in a delivery fluid within the delivery reservoir by modifying an affinity of at least one interaction site in the delivery reservoir for the primary material.

30. The method of claim 29, including ejecting the delivery fluid from the delivery reservoir.

31. The method of claim 30, including ejecting the delivery fluid into an environment, a downstream environmental interface, or a downstream fluid-handling structure.

32. The method of claim 31, including ejecting the delivery fluid into an environment including the body of an organism, a body of water, or a contained fluid volume.

33. The method of claim 31, including ejecting the delivery fluid into a downstream fluid-handling structure including at least one of a channel, a chamber, a mixer, or a separator.

34. The method of claim 29, wherein activating the electromagnetically responsive control element includes receiving the electromagnetic control signal with an electromagnetically responsive material.

35. The method of claim 34, wherein the electromagnetically responsive material includes a permanently magnetizable material, a ferromagnetic material, a ferrimagnetic material, a ferrous material, a ferric material, a dielectric or ferroelectric or piezoelectric material, a diamagnetic material, a paramagnetic material, and an antiferromagnetic material.

36. A delivery device comprising:

a delivery reservoir configured to contain a delivery fluid, the delivery reservoir having at least one outlet through which the delivery fluid may exit the delivery reservoir;

a delivery fluid contained within the delivery reservoir;

a primary material contained within the delivery reservoir and having a controllable effective concentration in the delivery fluid; and

at least one electromagnetically responsive control element adapted for modifying the distribution of the primary material between a first active form carried in the delivery fluid and a second form within the delivery reservoir in response to an incident electromagnetic control signal, the effective concentration being the concentration of the first active form in the delivery fluid, whereby delivery fluid exiting the delivery reservoir carries the primary material in the first active form at the effective concentration, and wherein the at least one electromagnetically responsive control element is selected from the group consisting of an electromagnetic field responsive molecule in the delivery fluid, a shape-changing structure that changes in at least one dimension in response to an electromagnetic control signal, an electromagnetic field responsive heating element, and an electromagnetic field responsive cooling element.