Remote-controllable, micro-scale device for use in in vivo medical diagnosis and/or treatment

• US 6,240,312 B1
• Filed: 10/23/1998
• Issued: 05/29/2001
• Est. Priority Date: 10/23/1997
• Status: Expired due to Fees

• Current Assignee: City College of New York
• Original Assignee: City College of New York
• Inventors: Wang, Quan-Zhen, Alfano, Scott, Ho, Ping Pei, Alfano, Robert R.
• Primary Examiner(s): Lateef, Marvin M.
• Assistant Examiner(s): SHAW, SHAWNA JEANNINE
• Application Number:
  US09/178,275
• Time in Patent Office: 949 Days
• Field of Search: 600/407, 600/473, 600/476, 600/585, 128/903, 348/65, 348/77
• US Class Current: 600/476
• CPC Class Codes: A61B 1/00016 using wireless means
• CPC Class Codes: A61B 1/00027 characterised by power supply
• CPC Class Codes: A61B 1/00156 using self propulsion
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 2034/303 specifically adapted for manipulations within body lumens, e.g. within lumen of gut, spine, or blood vessels
• CPC Class Codes: A61B 2562/028 Microscale sensors, e.g. electromechanical sensors [MEMS]
• CPC Class Codes: A61B 34/35 for telesurgery
• CPC Class Codes: A61B 34/72 Micromanipulators
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

Remote-controllable, micro-scale, robotic device for use in diagnosing and/or treating abnormalities inside a human body in vivo. The device has a length from 0.1 mm to 10 mm and can be introduced into the body either from natural body openings or by injection into the blood stream. Once inside the body, the device can be guided to different locations in the body by an outside operator using radio controls and computer software. 2-dimensional image information and spectroscopic information (e.g., fluorescence, absorption, elastic scattering, Raman, etc.) gathered by the device inside the body are transmitted by video and radio signals to a computer located externally relative to the body. The transmitted information is processed, analyzed and displayed by the external computer for use by the outside operator. The outside operator can then make a diagnosis and, if applicable, instruct the device to render a treatment on the examined area. Such treatments include the ablation of tissue using lasers or the like and the binding of ruptured tissues together using chemical glue, UV cured epoxy materials or photochemical or photo-ionization techniques using near-infrared light to weld tissue from absorption at water bands.

Claims

1. A wireless, remote-controllable, micro-scale device adapted for use inside a patient'"'"'s body, said wireless, remote-controllable, micro-scale device comprising:

(a) a transport capsule;

(b) means for moving said transport capsule inside a patient'"'"'s body;

(c) imaging means, on board said transport capsule, for collecting image information on the appearance of the inside of the patient'"'"'s body;

(d) examining means, on board said transport capsule, for collecting spectroscopic information regarding the presence of abnormal biological materials inside the patient'"'"'s body; and

(e) communication means, on board said transport capsule, for transmitting the information collected by said imaging means and said examining means to a location outside the patient'"'"'s body.

2. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said moving means comprises at least one of an air propeller, a liquid propeller, a gas assisted propeller, snail motion means, snake motion means, micro tractor treads, and multiple wheels.

3. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said transport capsule has a length of about 20 mm.

4. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said transport capsule has a length of less than about 20 mm.

5. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said examining means comprises a light source for irradiating an area of the patient'"'"'s body and means for detecting light from the irradiated area at one or more wavelengths.

6. The wireless, remote-controllable, micro-scale device as claimed in claim 5 wherein said light source is selected from the group comprising a semiconductor laser with/without harmonic generator, an LED, and a flash lamp with wavelength selection filters covering from 250 nm to 1400 nm.

7. The wireless, remote-controllable, micro-scale device as claimed in claim 5 wherein said detecting means comprises at least one of a CCD system, a photo-multiplier tube and a photo avalanche diode using a small scale multiple color selector.

8. The wireless, remote-controllable, micro-scale device as claimed in claim 7 wherein said small scale multiple color selector comprises at least one of a grating, a prism, a wide band filter set and one or more narrow band filter sets.

9. The wireless, remote-controllable, micro-scale device as claimed in claim 1 further comprising means on board said transport capsule for treating the patient'"'"'s body.

10. The wireless, remote-controllable, micro-scale device as claimed in claim 9 wherein said treatment means comprises a laser for ablating and/or welding tissue.

11. The wireless, remote-controllable, micro-scale device as claimed in claim 10 wherein said laser is mounted on a cable extending away from the transport capsule.

12. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said moving means comprises a movable member for providing said transport capsule with motility and a power source for moving said movable member.

13. The wireless, remote-controllable, micro-scale device as claimed in claim 12 wherein said power source is a battery.

14. The wireless, remote-controllable, micro-scale device as claimed in claim 13 wherein said battery is at least one of a standard high efficiency micro-battery and a high density chemical battery.

15. The wireless, remote-controllable, micro-scale device as claimed in claim 1 wherein said moving means comprises a movable member for providing said transport capsule with motility and means for powering the movement of said movable member, said powering means being energizable by an external source.

16. A system for use in internally examining a patient, said system comprising:

(a) a computer, said computer comprising means for receiving wireless signals; and

(b) the wireless, remote-controllable, micro-scale device as claimed in claim 1.

17. A method of examining a patient comprising the steps of:

(a) providing the wireless, remote-controllable, micro-scale device of claim 1;

(b) introducing the wireless, remote-controllable, micro-scale device into the patient; and

(c) transmitting the image and/or examination information collected by said collecting means to a receiver located outside of the patient'"'"'s body.

18. The method as claimed in claim 17 wherein said moving means of said wireless, remote-controllable, micro-scale device comprises at least one of an air propeller, a liquid propeller, a gas assisted propeller, snail motion means, snake motion means, micro tractor treads and multiple wheels and wherein said device further comprises means for treating the patient.

19. The method as claimed in claim 17 wherein said wireless, micro-scale device is introduced into the patient orally.

20. The method as claimed in claim 17 wherein said wireless, micro-scale device is introduced into the patient intravenously.

21. The wireless, remote-controllable, micro-scale device

(a) as claimed in claim 1 wherein said transport capsule is 0.1 mm to 20 mm in length.

22. The wireless, remote-controllable, micro-scale device as claimed in claim 21 wherein said examining means comprises a light source, the light source being selected from the group comprising semiconductor lasers, flash lamps, and LED'"'"'s.

23. The wireless, remote-controllable micro-scale device as claimed in claim 22 wherein said examining means also comprises a photodetector, the photodetector being selected from the group comprising photo diodes, avalanche photodiode, and photomultiplier tube (PMT).

24. The wireless, remote-controllable micro-scale device as claimed in claim 23 wherein said examining means further comprises changeable optical filters or transmission gratings.

25. The wireless, remote-controllable, micro-scale device as claimed in claim 24 wherein the device diagnoses diseases in vivo of stomach, GI track, prostate, blood vessels, heart, GYN track, and ducts of breast.

26. The wireless remote-controllable, micro-scale device as claimed in claim 25 wherein optical filters are moved into position to select wavelengths using microelectromechanical gears.

27. A wireless, remote-controllable, micro-scale device adapted for use inside a patient'"'"'s body, said wireless, remote-controllable, micro-scale device comprising:

(a) a transport capsule;

(b) means for moving said transport capsule inside a patient'"'"'s body;

(c) imaging meas, on board said transport capsule, for collecting image information on the appearance of the inside of the patient'"'"'s body;

(d) examining means, on board said transport capsule for collecting information regarding the presence of abnormal biological materials inside the patient'"'"'s body wherein said examining means comprises a light source for irradiating an area of the patient'"'"'s body and means for detecting light from the irradiated area at one or more wavelengths and wherein said examining means measures native fluorescence information from the irradiated area; and

(e) communication means, on board said transport capsule, for transmitting the information collected by said imaging means and said examining means to a location outside the patient'"'"'s body.

28. A wireless, remote-controllable, micro-scale device adapted for use inside a patient'"'"'s body, said wireless, remote-controllable, micro-scale device comprising:

(a) a transport capsule;

(b) means for moving said transport capsule inside a patient'"'"'s body;

(c) imaging meas, on board said transport capsule, for collecting image information on the appearance of the inside of the patient'"'"'s body;

(d) examining means, on board said transport capsule, for collecting information regarding the presence of abnormal biological materials inside the patient'"'"'s body wherein said examining means comprises a light source for irradiating an area of the patient'"'"'s body and means for detecting light from the irradiated area at one or more wavelengths and wherein said examining means measures native Raman information from the irradiated area; and

(e) communication means, on board said transport capsule, for transmitting the information collected by said imaging means and said examining means to a location outside the patient'"'"'s body.

29. A system for use in internally examining a patient, said system comprising:

(a) a computer;

(b) a micro-scale device comprising

(i) a transport capsule, said transport capsule being 0.1 mm to 20 mm in length;

(ii) means for moving said transport capsule inside a patient'"'"'s body;

(iii) imaging means, on board said transport capsule, for collecting image information on the appearance of the inside of the patient'"'"'s body;

(iv) examining means, on board said transport capsule, for collecting spectroscopic information regarding the presence of abnormal biological materials inside the patient'"'"'s body; and

(c) a wire cable electrically connecting said micro-scale device to said computer.

30. The system as claimed in claim 29 wherein said micro-scale device further comprises means for moving said transport capsule inside a patient'"'"'s body.