Micro-Devices for Biomedical Applications and Method of Use of Same

• US 20130006103A1
• Filed: 07/23/2012
• Published: 01/03/2013
• Est. Priority Date: 04/01/2009
• Status: Abandoned Application

• Current Assignee: Anpac Bio-Medical Science Co., Ltd.
• Original Assignee: Anpac Bio-Medical Science Co., Ltd.
• Inventors: Yu, Chris C., Yu, He
• Application Number:
  US13/555,858
• Publication Number:
  US 20130006103A1
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: A61B 5/417 the bone marrow
• CPC Class Codes: A61M 2037/0023 Drug applicators using microneedles
• CPC Class Codes: A61M 37/0015 by using microneedles

Abstract

Among others, the present invention provides fabricated micro-devices for application in live biological systems, each comprising (a) an outer membrane, (b) a micro-mechanical, micro-chemical, micro-chemical-mechanical, micro-optical, micro-acoustical, micro-biological, micro-bio-chemical, micro-bio-chemical-mechanical, micro-electro-bio-chemical-mechanical, micro-electro-chemical-mechanical, micro-electro-bio-chemical-mechanical, micro-electro-mechanical, micro-electromagnetic-mechanical, micro-acoustic-mechanical, and micro-superconducting-mechanical properties, and (c) having a size as defined by the outer membrane ranging from 1 angstrom to 5 millimeters; and methods of using such fabricated micro-devices.

Claims

1. A fabricated micro-device for application in live biological systems, said micro-device comprising

(a) an outer membrane;

(b) at least one of the following properties selected from the group consisting of ;

micro-mechanical, micro-chemical, micro-chemical-mechanical, micro-optical, micro-acoustical, micro-biological, micro-bio-chemical, micro-bio-chemical-mechanical, micro-electro-bio-chemical-mechanical, micro-electro-chemical-mechanical, micro-electro-bio-chemical-mechanical, micro-electro-mechanical, micro-electromagnetic-mechanical, micro-acoustic-mechanical, and micro-superconducting-mechanical properties; and

(c) having a size as defined by the outer membrane ranging from 1 angstrom to 5 millimeters.

4. The fabricated micro-device in claim 1, wherein said micro-device has desired properties for preferential adsorption onto targeted biological organ and cell structure surfaces.

5. The fabricated micro-device in claim 1, wherein said micro-device has desired properties for preferential absorption onto targeted biological organ and cell structure surfaces.

6. The fabricated micro-device in claim 1, wherein said micro-device has means to differentiate cancer cells from normal cells.

8. The fabricated micro-device in claim 1, wherein said micro-device can perform at least one function selected from the group consisting of:

measure microscopic properties of organ and cell structures, diagnose organ and cell structures at a microscopic level, deliver desired chemistry to organ and cell structures at a microscopic level, deliver desired drug to organ and cell structures at a microscopic level, and manipulate selected organ and cell structure at a microscopic level, in a non-invasive manner.

9. The fabricated micro-device in claim 1, wherein said micro-device can perform at least one function selected from the group consisting of:

measure microscopic properties of organ and cell structures, diagnose organ and cell structures at a microscopic level, deliver desired chemistry to organ and cell structures at a microscopic level, deliver desired drug to organ and cell structures at a microscopic level, and manipulate selected organ and cell structure at a microscopic level, in real time.

10. The fabricated micro-device in claim 1, wherein said micro-device has the function to measure microscopic properties including at least one property selected from the group consisting of:

surface charge, resting potential, electro-chemical potential, electrical potential, surface wettability, contact angle, adhesion, temperature, density, friction, hardness, surface tension, trace chemical concentration, hydrophobic level, hydrophilic level, pH, liquid flow rate, pressure, optical properties, absorption, adsorption, and composition.

11. The fabricated micro-device in claim 1, wherein said micro-device has hardware and means for local positioning, location identification, location information communication and location positioning.

13. The fabricated micro-device in claim 1, wherein said micro-device has a pre-programmed trigger function for actions selected from the group consisting of:

chemistry delivery, mechanical force action, charge injection, light emitting, voltage application, cooling and heating onto organic structures.

14. The fabricated micro-device in claim 13, wherein said trigger function is achieved by the employment from a group of parameters selected from the group consisting of:

charge, resting potential, electrical potential, electro-chemical potential, surface current, bulk current, surface wettability, adhesion property, hydrophobic level, hydrophilic level, flow property, electrical field, magnetic field, acoustic field, temperature, light wavelength and/or intensity, frictional force and coefficient, hardness, pressure and external signal detected by the device.

15. The micro-device in claim 1, wherein said micro-device optionally has a dissolution capability at a targeted pH range between 30 seconds and three (3) days.

19. The fabricated micro-device in claim 1, wherein said micro-device has a size from 1 angstrom to 100 microns for selective attachment applications.

20. The fabricated micro-device in claim 1, wherein said micro-device comprises at least one material with multiple sub-devices integrated onto one unit with at least one functionality.

23. The fabricated micro-device in claim 20, wherein said micro-device has a preferred size from 0.01 micron to 5 millimeters.

24. The fabricated micro-device in claim 1, wherein said micro-device is optionally an integrated micro-device comprising of at least one function selected from the group consisting of:

detecting, measuring, calculating, analyzing, diagnosing, logic processing (decision making), transmitting, and operating/surgical hardware and functions.

27. The fabricated micro-device in claim 1, wherein said micro-device has means for cleaning comprising:

cleaners, filters, shredders, injectors and pumps.

28. The fabricated micro-device in claim 1, wherein said micro-device has means for injecting a desired chemical component to the location to be cleaned comprising:

at least one cleaner, at least one micro-filter, at least one shredder, and at least one injector.

29. The fabricated micro-device in claim 1, wherein said micro-device comprises at least a polishing unit with a polishing pad.

33. The fabricated micro-device in claim 1, wherein said micro-device is a micro-tester for continued scan and analysis of live biological system for early disease detection and prevention.

34. The fabricated micro-device in claim 33, wherein said micro-tester comprises:

(a) sensors;

(b) micro-tip for sample collection;

(c) micro-arrays for testing collected sample;

(d) data analysis unit; and

(e) signal transmitter.

35. The fabricated micro-device in claim 34, wherein said micro-tester has a preferred size from 1 micron to 100 microns for human cell tests and analysis.

36. The fabricated micro-device in claim 34, wherein said micro-tester has a preferred size from 10 microns to 5 millimeters for human organ tests and analysis.

37. The fabricated micro-device in claim 34, wherein said micro-tester has a preferred size from 2 angstroms to 50 microns for tests and analysis of bacteria, human DNA, and cells of relatively small to medium sizes.

38. The fabricated micro-device in claim 37, wherein said micro-tester is employed for early cancer detection and prevention in vivo.

3. A fabricated micro-device for application outside a biological system, said micro-device comprising (a) an outer membrane;

(b) at least one of the following properties selected from the group consisting of;

micro-mechanical, micro-chemical, micro-chemical-mechanical, micro-optical, micro-acoustical, micro-biological, micro-electro-mechanical, micro-electromagnetic-mechanical, micro-acoustic-mechanical, and micro-superconducting-mechanical properties; and

(c) having a size ranging from 1 angstrom to 5 millimeters.

39. The method of using a fabricated micro-device whereby said micro-device is used for biological cleaning functions.

40. The method of using a fabricated micro-device in claim 39, wherein use of the said micro-device is for cleaning human veins and arteries for preventing heart attacks, strokes, and any form of blood clogging.

41. The method of using a fabricated micro-device in claim 40, comprising the steps of:

(a) delivering a micro-device to the general area where cleaning is to be carried out;

(b) optionally measuring local parameters selected from a group comprising;

local temperatures, local pressures, local frictional forces, local surface charges, local resting potentials, local electrical potentials, local surface properties, local compositions and local fluid flow rates;

(c) optionally triggering cleaning function;

(d) performing cleaning (e) optionally collecting debris from cleaning by a micro-collector and transporting said debris away; and

, (f) optionally collecting debris by a micro-filter and transporting said debris away.

42. The method of using a fabricated micro-device in claim 41, wherein a type of or combinations of types of micro-devices for cleaning plaques in human veins comprising the steps of:

(a) delivering a micro-device into the veins;

(b) optionally sensing and analyzing data being collected, for instance local pressure;

(c) optionally triggering cleaning functions when the targeted blood vein location is reached;

(d) cleaning plaque and deposits from the vein wall at the targeted location;

(e) optionally, injecting desired chemistry into the blockage to be cleaned to soften the plaque being cleaned, avoid formation of large debris from breakage from plaque, and minimize possible damage to the veins;

(f) optionally dissolving said micro-device following completion of cleaning or filtered out via blood filtration;

(g) optionally filtering of said micro-device and debris via blood filtration during and following completion of cleaning; and

, (h) optionally carrying out post-cleaning treatments by said micro-device.

43. The method of using a fabricated micro-device in claim 40, wherein said cleaning is carried out by at least one of the following means:

mechanical polishing, mechanical rubbing, chemical-mechanical polishing, chemical dissolution, chemical passivation, chemical treatments, biological treatments, polishing with chemical dissolution, and laser oblation.

44. The method of using a fabricated micro-device for delivering multiple doses of drug comprising:

(a) transportation of micro-device to the desired location in vivo;

(b) delivering the first drug to the target; and

(c) delivering a second dose of the drug to the same target within a desired time interval from the delivery time of the initial delivery.

45. The method of using a fabricated micro-device in claim 44, wherein the multiple doses are comprised of different drugs.

46. The method of using a fabricated micro-device in claim 44, wherein the drugs are of different chemistries and delivering of a first drug will enhance the attachment selectivity to the second drug.

47. The method of using a fabricated micro-device, wherein one type or a combination of at least two types of micro-devices perform activities selected from the group consisting of:

drug delivery, cutting, removing, polishing, transporting, jointing, diagnosing, sensing, selective protection, targeted removing, measuring, and assisting medical treatment functions at cell structure level or micro-organ (up to 500 micron scale) level for medical purposes including cancer and treatment of blood related diseases.

48. The method of using a fabricated micro-device in claim 47, using one or more micro-devices for cancer treatment comprising the steps of:

(a) selectively attaching micro-devices with drug delivery functions onto cancer cells;

(b) triggering injection function in the micro-devices; and

, (c) injecting drug into cancer cells.

49. The method of using a fabricated micro-device in claim 47, said method comprising the steps of:

(a) selectively attaching micro-devices with high optical reflectivity onto healthy cells;

(b) carrying out laser treatment to destroy unhealthy cells; and

, (c) removing unhealthy cells in the treatment due to exposure to the laser.

50. The method of using a fabricated micro-device in claim 47, said method for diagnosing, sensing, and measuring functions comprising the steps of:

(a) delivering one or more micro-devices to a targeted measuring site;

(b) said micro-device having properties selected from the group comprising of;

signal sensing unit, memory unit, logic processing unit, signal transmitter, and micro-surgery;

(c) performing measurement on the targeted site;

(d) recording data in memory unit;

(e) optionally triggering operations using the logic processing function;

(f) optionally, carrying out surgery using the said micro-device;

(g) retrieving the micro-device or micro-devices; and

, (h) analyzing the recorded data.

51. The method of using a fabricated micro-device in claim 47, for diagnosing, sensing, and measuring functions comprising the steps of:

(a) delivering one or more micro-devices to a targeted measuring site, (b) said micro-device having properties selected from the group comprising of;

signal sensing unit, memory unit, signal transmitter, logic unit for on-site decision making and micro-surgery;

(c) performing measurements on the targeted site;

(d) recording data in memory unit;

(e) analyzing the data performed by said micro-device;

(f) deciding the course and type of micro-operations based on data analysis and pre-programmed logic decisions by said micro-device; and

(g) performing micro-operations on the measured site.

52. The method of using a fabricated micro-device in claim 47, said method for cancer cell detection comprising the steps of:

(a) selecting at least one micro-device(s) having at least one electrical property measurement unit;

(b) delivering said micro-device to a measurement site;

(c) measuring at least one or combination of properties selected from the following group comprising;

surface charge, charge density, resting potential, electrical potential, electro-chemical potential, surface current, bulk current, and current density is measured at the measurement site.

53. The method of using a fabricated micro-device in claim 52, selecting a micro-device for sensing comprising at least one voltage comparator.

54. The method of using a fabricated micro-device in claim 53, whereby the said voltage comparator has a preferred voltage measurement sensitivity better than 5 mV.

55. The method of using a fabricated micro-device in claim 47, said method is used for cancer cell detection comprising the steps of:

(a) delivering micro-device(s) to the site of measurement; and

, (b) measuring at least one or combination of the following parameters at the measurement site selected from the group comprising of;

surface charge, resting potential, electro-chemical potential, electrical potential, surface current, bulk current, surface wettability, contact angle, adhesion properties, temperature, density, friction, hardness, surface tension, trace chemical concentration, pH, liquid flow rate, pressure, optical properties, absorption, adsorption, and composition.