Gastrointestinal tract examining apparatus

• US 7,448,993 B2
• Filed: 09/27/2004
• Issued: 11/11/2008
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Takizawa, Hironobu, Segawa, Hidetake, Yokoi, Takeshi, Kikuchi, Akira
• Primary Examiner(s): Dvorak; Linda C. M.
• Assistant Examiner(s): Kasztejna; Matthew J
• Application Number:
  US10/951,100
• Publication Number:
  US 20050085697A1
• Time in Patent Office: 1,506 Days
• Field of Search: 600/114
• US Class Current: 600/114
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 1/273 for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes

Abstract

A gastrointestinal tract examining apparatus includes a capsular endoscope which examines the gastrointestinal tract, a flexible tube member, a flexible string member which is inserted in the tube member, and a connecting portion which is arranged to the capsular endoscope. In the gastrointestinal tract examining apparatus, the tube member is separated from the capsular endoscope by detachably connecting the string member to the connecting portion.

Claims

1. A gastrointestinal tract examining apparatus comprising:

a capsular endoscope which examines the gastrointestinal tract;

a flexible tube;

a connecting portion arranged on the capsular endoscope, and

a flexible string which is inserted in the flexible tube and releasably engages the connecting portion to connect the flexible tube to the capsular endoscope;

wherein the flexible tube is separated from the capsular endoscope by detaching the flexible string from the connecting portion, and

wherein the connecting portion is a through-hole which is arranged to the capsular endoscope, and the capsular endoscope is detachably connected to the tube by inserting the flexible string in the through-hole, and wherein the peripheral portion of the through-hole has a sharp portion which cuts the flexible string by towing the flexible string with a force of a certain level or more, or has a thin portion which will break, or which will fall down from the peripheral portion of the through-hole by towing the flexible string with force of a certain level or more.

2. The gastrointestinal tract examining apparatus according to claim 1, wherein the outer diameter of the flexible tube has a diameter which is at most half of the outer diameter of the capsular endoscope.

3. The gastrointestinal tract examining apparatus according to claim 2, wherein the outer diameter of the flexible tube is 5 mm or less.

4. The gastrointestinal tract examining apparatus according to claim 2, wherein the flexible tube has flexibility that it is not easily bent by tractive force of the flexible string inserted in the flexible tube.

5. The gastrointestinal tract examining apparatus according to claim 1, further comprising:

holding means which detachably holds the end portion of the flexible string near the proximal end of the flexible tube.

6. The gastrointestinal tract examining apparatus according to claim 1, wherein one tip of the flexible string is detachably fixed by a fixing portion arranged in the flexible tube, and another end of the flexible string is inserted from the distal end of the flexible tube to the proximal end via the connecting portion arranged to the capsular endoscope.

7. The gastrointestinal tract examining apparatus according to claim 6, wherein one tip of the flexible string is detachably fixed by the fixing portion arranged near the distal end of the flexible tube.

8. The gastrointestinal tract examining apparatus according to claim 1, wherein the outer surface of the distal end portion of the flexible tube has an R-shaped chamfering portion to the outer surface of the distal end portion of the flexible tube.

9. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible tube has, at the distal end portion thereof, a semi-spherical distal end member independent of the flexible tube.

10. The gastrointestinal tract examining apparatus according to claim 1, wherein a distal end of the flexible tube is softer than a proximal end of the flexible tube.

11. The gastrointestinal tract examining apparatus according to claim 10, wherein a predetermined length of the distal end of the flexible tube is softer Than other portions of the flexible tube.

12. The gastrointestinal tract examining apparatus according to claim 10, wherein the flexible tube has a hardness which varies along its length.

13. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible tube has a fluid injecting portion at a vicinity of a proximal end of the flexible tube for injecting one or more of liquid and air into the flexible tube.

14. The gastrointestinal tract examining apparatus according to claim 1, wherein a plurality of the through-holes are arranged at a predetermined spacing, each of a plurality of flexible strings inserted into the plurality of through-holes are inserted in the flexible tube, and at least one tip of the plurality of flexible strings extends from the proximal end of the flexible tube.

15. The gastrointestinal tract examining apparatus according to claim 14, wherein the plurality of flexible strings are individually tensioned or loosened, thereby oscillating the capsular endoscope.

16. The gastrointestinal tract examining apparatus according to claim 14, wherein the flexible tube is a multi-lumen tube having a number of lumens corresponding to at least a number of flexible strings.

17. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible tube is a multi-lumen tube having a number of lumens corresponding to at least twice a number of flexible strings.

18. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible tube is a torque tube formed by one of embedding a metallic net into resin, embedding a metallic spiral member into resin, a tube containing fluorocarbon resin and a resin tube.

19. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible string comprises a thread formed from one of a fluorocarbon resin and nylon string.

20. The gastrointestinal tract examining apparatus according to claim 1, wherein the flexible string is a thread which is soft and is easily cut such as a cotton thread, silk thread, polyester yam, and wool thread.

21. An examining method comprising the steps of:

releasably connecting a capsular endoscope to a flexible tube by a flexible string arranged in the flexible tube, wherein the entirety from a distal end to a proximal end of the flexible string is formed by a single flexible member, and the flexible string engages a connecting portion of the capsular endoscope;

swallowing the connected capsular endo scope;

performing the endoscope examination of a desired portion by towing or loosening the flexible tube after the capsular endoscope passes through the throat; and

separating the flexible tube from the capsular endoscope by pulling out the flexible string at a desired position.

22. The examining method according to claim 21, further comprising the step of:

performing the endoscope examination with the single capsular endoscope after the step of separating the tube member from the capsular endoscope.

23. An examining method comprising the steps of:

releasably connecting a capsular endoscope to a flexible tube by a flexible string arranged in the flexible tube, wherein the entirety from a distal end to a proximal end of the flexible string is formed by a single flexible member, and the flexible string engages a connecting portion of the capsular endoscope;

swallowing the connected capsular endoscope;

performing the endoscope examination of a desired portion by towing or loosening the flexible tube after the capsular endoscope passes through the throat;

transmitting a fluid to a tube from the outside of the body, and discharging the fluid near the rear end of the capsular endoscope from the distal end of the flexible tube;

performing the endoscope examination after discharging the fluid; and

separating the flexible tube from the capsular endoscope by detaching the flexible string from the connecting portion at a desired position.

24. The examining method according to claim 23, wherein the fluid contains a dye.

25. An examining method comprising the steps of:

connecting a capsular endoscope to a flexible tube by a plurality of flexible strings arranged in the flexible tube, wherein the entirety from distal ends to proximal ends of the plurality of flexible strings are formed by a single flexible member;

swallowing the capsular endoscope connected to the flexible tube;

changing the direction of the field of view of the capsular endoscope by operating one or more of the plurality of flexible strings after the capsular endoscope passes through the cardia or throat and while the capsular endoscope is connected to the flexible tube;

separating the flexible tube from the capsular endoscope by pulling the flexible strings at a desired position; and

pulling only the flexible tube to the outside of the body.

26. A gastrointestinal tract examining apparatus comprising:

a capsular endoscope which examines the gastrointestinal tract;

a flexible tube member;

a flexible string member which is inserted in the tube member; and

a connecting portion which is arranged to the capsular endoscope,

wherein the tube member is separated from the capsular endoscope by detachably connecting the string member to the connecting portion, the connecting portion is a through-hole which is arranged to the capsular endoscope, and the capsular endoscope is detachably connected to the tube member by inserting the string member in the through-hole and the peripheral portion of the through-hole has a sharp portion which cuts the string member by tensioning the string member with a force of a predetermined magnitude.

27. A gastrointestinal tract examining apparatus comprising:

a capsular endoscope which examines the gastrointestinal tract;

a flexible tube member;

a flexible string member which is inserted in the tube member; and

a connecting portion which is arranged to the capsular endoscope,

wherein the tube member is separated from the capsular endoscope by detachably connecting the string member to the connecting portion, the connecting portion is a though-hole which is arranged to the capsular endoscope, and the capsular endoscope is detachably connected to the tube member by inserting the string member in the though-hole and the peripheral portion of the though-hole has a thin portion which will one of break and release from the peripheral portion of the though-hole by tensioning the string member with a force of a predetermined magnitude.

28. A gastrointestinal tract examining apparatus comprising:

a capsular endoscope which examines the gastrointestinal tact;

a flexible tube member;

a flexible string member which is inserted in the tube member; and

a connecting portion which is arranged to the capsular endoscope,

wherein the tube member is separated from the capsular endoscope by detachably connecting the string member to the connecting portion, the connecting portion comprises a caved portion which is arranged to the capsular endoscope and a fitting member which is fit into the caved portion, and the capsular endoscope is detachably connected to the tube member by locking the string member into the caved portion with the fitting member and wherein the fitting member fit into the caved portion releases from the caved portion by tensioning the string member with a force of a predetermined magnitude.