Encapsulated medical device and method of examining, curing, and treating internal region of body cavity using encapsulated medical device

• US 7,651,471 B2
• Filed: 06/13/2006
• Issued: 01/26/2010
• Est. Priority Date: 09/27/2001
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Takizawa, Hironobu, Segawa, Hidetake, Yokoi, Takeshi, Adachi, Hideyuki
• Primary Examiner(s): Hindenburg; Max
• Assistant Examiner(s): SZMAL, BRIAN SCOTT
• Application Number:
  US11/451,914
• Publication Number:
  US 20060229592A1
• Time in Patent Office: 1,323 Days
• Field of Search: 600/549, 600/561, 600/593, 600/309, 600/437, 600/562, 600/114, 600/117, 604/28, 604/65, 604/516, 604/909, 607/92, 606/32, 606/108, 606/174, 128/903, 128/899, 417/474, 623/66.1
• US Class Current: 600/593
• CPC Class Codes: A61B 1/00156 using self propulsion
• CPC Class Codes: A61B 1/00158 using magnetic field
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 5/42 Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems A61B1/00, A61B5/4857, A61B5/486, A61B5/4866, A61B5/4869 take precedence
• CPC Class Codes: A61B 5/7232 involving compression of the physiological signal, e.g. to extend the signal recording period

Abstract

An encapsulated medical device is passed through the lumen of a body cavity in order to examine, cure, or treat an internal region of the body cavity under the control of the extracorporeal device. A capsule body has a linkage hole bored in the extended portion thereof so that when the capsule body comes into close contact with the internal surface of a body cavity to block the lumen thereof, the linkage hole will realize a fluid passage which allows a fluid such as a gas or humor to flow into the forward and backward parts of the lumen.

Claims

1. An encapsulated medical device comprising:

a capsule body capable of passing through the lumen of a body cavity to permit examination or treatment; and

a fluid passage, one of provided in and on the capsule body, for when the capsule body passes through the lumen of the body cavity, if the capsule body comes into close contact with the internal surface of the body cavity to block the lumen of the body cavity, linking forward and backward portions of the lumen of the body cavity;

wherein the capsule body includes at least one medical-purpose examining means including at least one of an optical sensor, a PH sensor, a temperature sensor, a pressure sensor or an ultrasonic probe; and

wherein the fluid passage is formed directly in the capsule body or in an armor member that is freely detachably attached to the periphery of the capsule body.

2. The encapsulated medical device according to claim 1, wherein an extended portion is provided of which cross section cut at right angle to the longitudinal axis is non-circular and enlarged in the direction of one axis of the capsule body of cross section that is substantially circular, and the fluid passage is provided to the extended portion.

3. The encapsulated medical device according to claim 1, wherein a plurality of fluid passages are formed in one direction with respect to the longitudinal axis of the capsule body.

4. The encapsulated medical device according to claim 1, wherein the capsule body includes at least one observing means.

5. The encapsulated medical device according to claim 1, wherein a plurality of fluid passages are formed substantially symmetrically to one another with respect to the longitudinal axis of the capsule body.

6. The encapsulated medical device according to claim 1, wherein the capsule body has a plurality of hard members linked by a flexible string-like member.

7. The encapsulated medical device according to claim 1, wherein the capsule body has a battery that supplies power and a switch to control power supply from the battery incorporated therein.

8. The encapsulated medical device according to claim 1, wherein the capsule body includes at least one opening means for a treating or examining means such as a medicine administration port or a humor infusion port.

9. The encapsulated medical device according to claim 1, wherein the capsule body includes at least one treating means such as an injection needle.

10. The encapsulated medical device according to claim 1, wherein the fluid passage is a spiral groove.

11. The encapsulated medical device according to claim 1, wherein the capsule body has at least a magnet incorporated therein.

12. The encapsulated medical device according to claim 1, wherein the capsule body has at least a magnet incorporated therein, and the fluid passage is a spiral groove.

13. The encapsulated medical device according to claim 1, wherein the fluid passage is a linkage hole formed between the capsule body and the armor member or in the armor member.

14. The encapsulated medical device according to claim 1, wherein the fluid passage is a linkage groove formed in the armor member.

15. The encapsulated medical device according to claim 1, wherein a plurality of projections are formed on the armor member, and the fluid passage is realized with a plurality of concave parts formed among the plurality of projections.

16. The encapsulated medical device according to claim 1, wherein the armor member is a hard tubular member, and the fluid passage is formed with the internal surface of the tubular member and the notches formed in the periphery of the capsule body.

17. The encapsulated medical device according to claim 1, wherein the armor member is a transparent member formed to enclose the entire periphery of the capsule body, and the fluid passage is formed in the transparent member or between the internal surface of the transparent member and the outer periphery of the capsule body.

18. The encapsulated medical device according to claim 1, wherein the armor member is a mesh cover attached to the outer periphery of the capsule body and the fluid passage is realized with small holes of the mesh of the mesh cover.

19. The encapsulated medical device according to claim 18, wherein the mesh cover does not cover at least the observation range of the observing means.

20. The encapsulated medical device according to claim 1, wherein the armor member is a sack-like elastic balloon capable of expanding along the outer periphery of the capsule body, and the fluid passage is formed between the internal surface of the elastic balloon and the outer periphery of the capsule body.

21. The encapsulated medical device according to claim 1, wherein the fluid passage is a linkage hole or linkage groove formed in the capsule body.

22. The encapsulated medical device according to claim 1, wherein a plurality of projections are formed on the capsule body, and the fluid passage is realized with a plurality of concave parts formed among the plurality of projections.

23. The encapsulated medical device according to claim 1, wherein the fluid passage is a spiral groove formed in the armor member.

24. The encapsulated medical device according to claim 1, wherein the armor member is an elastic member.

25. The encapsulated medical device according to claim 4, wherein:

the capsule body has the center axis thereof which passes the center of the minor axis of a cross section thereof cut at right angle to the longitudinal axis thereof, deviated from the optical axis of the observing means; and

the fluid passage is formed in a space extending on the opposite side of the optical axis of the observing means with respect to the center of the minor axis of the cross section cut at right angle to the longitudinal axis.

26. The encapsulated medical device according to claim 4, wherein the capsule body includes a plurality of observing means which permit observations in different directions.

27. A method of examining or treating an internal region of the lumen of a body cavity using an encapsulated medical device, the method comprising:

step of introducing a capsule body into a body cavity;

step of examining or treating an internal region of the lumen of the body cavity when the capsule body passes through the lumen of the body cavity;

step of having a fluid flow through a fluid passage formed in or on the capsule body or an armor member mounted to the capsule body to link forward and backward portions of the lumen of the body cavity if the capsule body comes into close contact with the internal surface of the lumen of the body cavity to block the lumen of the body cavity during the examination or treatment of the internal region of the lumen of the body cavity, and

step of introducing a string-like tool to recover the capsule body from the lumen of the body cavity if the capsule body comes into close contact with the internal surface of the lumen of the body cavity to block the lumen of the body cavity during the examination or treatment of the internal region of the lumen of the body cavity;

wherein the lumen of the body cavity is that of a small or large intestine.

28. The method of claim 27, further comprising:

step of forming a fluid passage to link the forward and backward parts of the lumen of the body cavity.