Medical instrument for use in combination with an endoscope
First Claim
1. A medical instrument for use in combination with an endoscope, comprising:
- an elongated insertion section to be inserted into a body through an instrument channel of an endoscope, said insertion section having a sheath comprising an inner tube and an outer tube capable of moving back and forth in an axial direction with respect to the inner tube;
an operation section connected to a proximal end of the insertion section, connected to a proximal end of said inner tube, and having a suction device for generating a suction force; and
a sampling unit connected to a distal end of the insertion section and adapted to be driven by operating the operation section, for sampling a part of a living tissue present in the body, said sampling unit comprising a sample receiving chamber provided on a distal portion of said inner tube and having a single opening, through which a living tissue is to be drawn by the suction force applied from said inner tube, and a cutting unit for cutting a part of the living tissue drawn into said sample receiving chamber as said inner tube and said outer tube are moved relative to each other in the axial direction.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical instrument comprising an insertion section, an operation section connected to a proximal end of the insertion section, and sampling means. The insertion section has a sheath comprising an inner tube and an outer tube capable of moving back and forth in an axial direction with respect to the inner tube. The operation section is connected to a proximal end of the inner tube and has suction means for generating a suction force. The sampling means comprises a distal unit provided on a distal portion of the inner tube and having an opening through which a living tissue is to be drawn by the suction force applied from the inner tube, and cutting means for cutting a part of the living tissue drawn into the distal unit as the inner tube and the outer tube are moved relative to each other in an axial direction.
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Citations
39 Claims
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1. A medical instrument for use in combination with an endoscope, comprising:
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an elongated insertion section to be inserted into a body through an instrument channel of an endoscope, said insertion section having a sheath comprising an inner tube and an outer tube capable of moving back and forth in an axial direction with respect to the inner tube; an operation section connected to a proximal end of the insertion section, connected to a proximal end of said inner tube, and having a suction device for generating a suction force; and a sampling unit connected to a distal end of the insertion section and adapted to be driven by operating the operation section, for sampling a part of a living tissue present in the body, said sampling unit comprising a sample receiving chamber provided on a distal portion of said inner tube and having a single opening, through which a living tissue is to be drawn by the suction force applied from said inner tube, and a cutting unit for cutting a part of the living tissue drawn into said sample receiving chamber as said inner tube and said outer tube are moved relative to each other in the axial direction. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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3. wherein said suction bypass includes a suction pipe having a side hole and a distal opening open to the distal end of said storage section;
- and wherein said suction pipe comprises a pipe having a hole therein defining the side hole.
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25. A medical instrument comprising:
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an elongated insertion section to be inserted into a body through an instrument channel of an endoscope, said insertion section having a sheath comprising an inner tube and an outer tube capable of moving back and forth in an axial direction with respect to the inner tube; an operation section connected to a proximal end of the insertion section, connected to a proximal end of said inner tube, and having a suction device for generating a suction force; a sampling unit connected to a distal end of the insertion section and adapted to be driven by operating the operation section for sampling a part of a living tissue present in the body, said sampling unit comprising a sample receiving chamber provided on a distal portion of said inner tube and having an opening through which a living tissue is to be drawn by the suction force applied from said inner tube, and a cutting unit for cutting a part of the living tissue drawn into said sample receiving chamber as said inner tube and said outer tube are moved relative to each other in the axial direction; and a storage section, provided in a vicinity of a distal end of said inner tube, for storing the living tissue cut by said cutting unit; wherein said storage section has a coupling portion removably connected to said inner tube. - View Dependent Claims (26, 27, 28, 29)
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30. A medical instrument comprising:
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an elongated insertion section to be inserted into a body through an instrument channel of an endoscope, said insertion section having a sheath comprising an inner tube and an outer tube capable of moving back and forth in an axial direction with respect to the inner tube; an operation section connected to a proximal end of the insertion section, connected to a proximal end of said inner tube, and having a suction device for generating a suction force; and a sampling unit connected to a distal end of the insertion section and adapted to be driven by operating the operation section for sampling a part of a living tissue present in the body, said sampling unit comprising a sample receiving chamber provided on a distal portion of said inner tube and having an opening through which a living tissue is to be drawn by the suction force applied from said inner tube, and a cutting unit for cutting a part of the living tissue drawn into said sample receiving chamber as said inner tube and said outer tube are moved relative to each other in an axial direction; wherein said cutting unit has a cutting member comprising a fixed end portion secured to said inner tube and a cutting portion for cutting a living tissue drawn into said inner tube; and wherein; said inner tube has a suction hole, said operation section has a suction casing provided at a proximal end of said outer tube and outside said inner tube and having an airtight chamber connected to said suction device, and said cutting member opens the opening of said sample receiving chamber while remaining in said airtight chamber and closes the opening of said sample receiving chamber while remaining outside said airtight chamber. - View Dependent Claims (31)
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32. A medical instrument for use in combination with an endoscope, comprising a flexible sheath, a suction lumen provided in the flexible sheath, a suction device which generates a suction force, said suction device being connected to a proximal end of the suction lumen, a cutting unit provided at a distal end of the flexible sheath, and a storage section provided in a proximal end of the cutting unit, for storing living tissue,
wherein said storage section has a suction bypass which has a distal opening open to a distal end of said storage section and a proximal opening open to a proximal end of said storage section; -
wherein said suction bypass includes a suction pipe having a side hole and a distal opening open to the distal end of said storage section; and wherein said suction pipe is made of a coil spring.
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33. A medical instrument for use in combination with an endoscope, comprising a flexible sheath, a suction lumen provided in the flexible sheath, a suction device which generates a suction force, said suction device being connected to a proximal end of the suction lumen, a cutting unit provided at a distal end of the flexible sheath, and a storage section provided in a proximal end of the cutting unit, for storing a living tissue,
wherein said storage section has a suction bypass which has a distal opening to a distal end of said storage section and a proximal opening open to a proximal end of said storage section; - and
wherein said storage section has a helical suction groove in an inner surface thereof.
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34. A medical instrument for use in combination with an endoscope, comprising a flexible sheath, a suction lumen provided in the flexible sheath and having a suction opening in a distal portion, suction device which generates a suction force, said suction device being connected to a proximal end of the suction lumen, and a cutting unit provided at a distal end of the flexible sheath,
wherein: -
said suction lumen has a suction hole in the proximal end thereof; said flexible sheath has, in a proximal end, a suction casing located outside said suction lumen and having a plurality of airtight chambers, at least one of which is connected to said suction device; and said suction hole remains in the at least one airtight chamber which is connected to said suction device, while said cutting unit keeps opening the opening, and which remains outside said at least one airtight chamber which is connected to said suction device, while said cutting unit keeps closing at least a part of the opening. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification