Apparatus for removing a foreign matter having individually operable trapping and flexing wires, a central channel for illumination, suction and injection and a laterally disposed bore for feeding fluids

• US 4,198,960 A
• Filed: 01/31/1978
• Issued: 04/22/1980
• Est. Priority Date: 01/31/1977
• Status: Expired due to Term

• Current Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Original Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Inventors: Utsugi, Mikio
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Tayon, Jeffrey W.
• Application Number:
  US05/873,779
• Time in Patent Office: 812 Days
• Field of Search: 128/4-8, 128/319, 128/320, 128/328, 128/340, 128/345, 128/242-244, 128/303.11, 128/303.15, 128/303.16, 128/356, 128/346
• US Class Current: 600/104
• CPC Class Codes: A61B 1/0125 Endoscope within endoscope
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

An apparatus for removing a foreign matter from the human body cavity includes a sheath to be inserted into the body cavity, a foreign matter trapping section and a device for selecting the flexing length of the flexing portion of the sheath. The sheath is made of a flexible material, and the foreign matter trapping section comprises a ring member disposed at the front end of the sheath and trapping wires extending through the lateral side wall of the sheath with their corresponding ends connected to the ring member in circumferentially spaced relation and their other ends individually movable longitudinally of the sheath. By individually operating the trapping wires a foreign matter within the body cavity can be positively caught by or held within a cage defined by the trapping wires. The flexing length selection device can properly adjust the flexing length of the flexing portion of the sheath to be inserted into the body cavity.

Claims

1. Apparatus for removing foreign matter from a body cavity comprising:

an elongated sheath made of flexible material and having bores extending through a lateral wall thereof;

a hollow cylindrical central channel extending through the sheath;

a connecting member disposed at a distal end of the sheath and provided at a center thereof with an opening larger than the diameter of the central channel of the sheath; and

a plurality of elastic, flexible trapping wires passing through respective ones of said bores so as to be individually movable lengthwise of the sheath, said trapping wires having ends at the distal end of the sheath connected to the connecting member in a circumferentially spaced relation to each other.

2. The apparatus according to claim 1, wherein a plurality of flexing wires for bending the sheath extend through in the sheath, said flexing wires having corresponding ends thereof connected to the distal end of the sheath in a circumferentially spaced relation.

3. The apparatus according to claim 2, wherein said flexing wires extend through the lateral wall of the sheath.

4. The apparatus according to claim 3, wherein a plurality of rod members more rigid than the flexing wires extend through the lateral wall of the sheath and are movable along the sheath for defining a length of a flexing portion of the sheath between the distal end of the sheath and forward ends of the rod members.

5. The apparatus according to claim 4, wherein said rod members extend through the lateral wall of the sheath in a circumferentially spaced relation.

6. The apparatus according to claim 5, wherein said central channel receives an optical system for observation and illumination.

7. The apparatus according to claim 5, wherein said optical system comprises an objective compound lens, a bundle of image guide fibers optically connected thereto and a bundle of light guide fibers surrounding the bundle of the image guide fibers.

8. The apparatus according to claim 7, wherein said optical system is removable from the central channel in the sheath.

9. The apparatus according to claim 5, wherein said channel comprises a fluid feeding channel.

10. The apparatus according to claim 5, wherein said channel comprises a sucking-in channel.

11. The apparatus according to claim 1, wherein said connecting member comprises a ring member.