Surgery – Instruments
Reexamination Certificate
2000-12-13
2003-02-18
Esquivel, Denise L. (Department: 3744)
Surgery
Instruments
C604S104000, C604S106000
Reexamination Certificate
active
06520954
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a manipulating section for an endoscopic treatment instrument including a hollow, first member, and a second member inserted into and movable relative to the first hollow member.
A Menghini tissue collecting needle, which is used for a biopsy of the pancreas, the liver and other organ by being inserted into and removed from a treatment instrument insertion channel in an endoscope, is known as one of endoscopic treatment instruments.
FIG. 17
shows the distal end portion of the Menghini tissue collecting needle which comprises a rod-shaped needle shaft
10
having a pointed end
11
and a tissue retaining recess
12
formed in the lateral side of an area close to the needle end
11
and into which an excised tissue specimen is retained.
A cannula or outer sheath
20
is fitted over the needle shaft
10
to be capable of moving back and forth along the longitudinal axis and it has an annular blade
21
formed on the inner circumference of the tip for cutting off the tissue retained in the recess
12
.
The Menghini tissue collecting needle is simply a combination of a needle shaft and a outer sheath and used after being passed into a rigid endoscope.
If the Menghini needle is to be used by passage through a treatment instrument insertion channel in a so-called “soft endoscope” having a flexible insertion portion, an extremely great frictional resistance is caused within the tortuous treatment instrument insertion channel, making it difficult to manipulate the needle shaft and the outer sheath so they can be moved back and forth by small amounts and independently of each other. Consequently, it has been impossible to collect a tissue specimen in a safe and rapid manner.
Japanese Patent Kokai Publication No. Hei. 9-103433 discloses another endoscopic treatment instrument having a hollow, outer sheath (
19
), a hollow piecing needle (
20
) inserted into the outer sheath, and a stylette or metal core (
21
) inserted into the piecing needle. In this instrument, a piecing section sliding section (
10
) of the outer sheath (
19
) can be fixed with respect to a piecing manipulating section (
9
) using a knob (
15
), the piecing needle (
20
) can not be fixed with respect to the manipulating section (
9
). Further, since the stylette (
21
) is fixed with respect to the piecing needle (
20
), the stylette (
21
) cannot be moved independently during endoscopic treatment.
That is, the outer sheath (
19
), the piecing needle (
20
) and the stylette (
21
) can not be moved independently of one another during endoscopic treatment.
This is very inconvenient. For example, if the outer sheath (
19
) is moved slightly forward or backward by loosing the knob (
15
) and moving the sliding section (
10
) of the outer sheath (
19
), the piecing needle (
20
) is also moved to undesirably be pieced into or removed from a mucosa layer. That is, the outer sheath (
19
) can not be moved while keeping the piecing needle (
2
) stationary.
This inconvenience is also encountered during endoscopic treatment with a high frequency instrument. A doctor wants to move an outer sheath alone while keeping a snare wire stationary during surgery for removing a polyp, but cannot do so readily with the available instrument.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a manipulating section for an endoscopic treatment instrument, which can fix a hollow member and another member inserted into the hollow member independently.
Another object of the present invention to provide a manipulating section for an endoscopic treatment instrument, which can move a hollow member and another member inserted into hollow member independently.
Yet another object of the present invention to provide a manipulating section for an endoscopic treatment, which can permit movement of one of a hollow member and another member inserted into the hollow member while keeping the other stationary.
Still another object of the present invention is to provide a manipulating section for an endoscopic tissue collecting instrument that allows for safe and rapid collection of a tissue specimen irrespective of whether it is used with a rigid or soft endoscope.
Further another object of the present invention is to provide a manipulating section for an endoscopic treatment instrument in which not only an outer sheath or hollow member but also a member disposed inside the outer sheath or hollow member to be movable in the longitudinal direction can be fixed with respect to an endoscope independently of each other.
According to a first aspect of the present invention, there is provided a manipulating section for an endoscopic treatment instrument, which has the first and second holding members. The first holding member can hold an end of a hollow, first member and can be selectively fixed or movable with respect to an endoscope during use.
According to a second aspect of the present invention, a manipulating section of an endoscopic tissue collecting instrument is designed such that it can be fixed to or disengaged from the entrance of a treatment instrument insertion channel in an endoscope. The basal end portion of a needle shaft and that of an outer sheath can be moved back and forth in unison along the longitudinal axis or fixed. Either the basal end portion of the needle shaft or that of the outer sheath is adapted to be capable of moving along the longitudinal axis or being fixed relative to the other of the basal end of the outer sheath or that of the needle shaft. Because of this design, both the operation of piercing the needle tip into the tissue and that of cutting off the tissue specimen collected in the tissue retaining recess can conveniently be performed from the side closer to the operator and, hence, the manipulating section of the invention allows for safe and quick collection of a tissue specimen irrespective of whether the endoscopic tissue collecting instrument is used with a rigid or soft endoscope.
According to a third aspect of the present invention, a manipulating section for an endoscopic treatment instrument is designed such that the basal end of an outer sheath and that of a member inserted into and passed through the outer sheath can be moved back and forth or fixed independently of each other along a frame plate adapted to be fixed to or disengaged from the entrance of a treatment instrument insertion channel in an endoscope. Not only an operation for moving the member back and forth with the outer sheath be fixed, but also an operation for moving the outer sheath with the member be fixed, and operation for fixing both the outer sheath and the member can be conducted as desired, thereby enabling endoscopic treatment in a simple and speedy manner.
A manipulating section according to the present invention is preferably applied to an endoscopic treatment instrument including a hollow, first member and a second member inserted into and movable relative to the first hollow member. The manipulating section is preferably designed to have a first plate, a first holding member holding an end of the first hollow member, the first holding member being movable along the plate, and selectively fixed with respect to the plate, and a second holding member holding an end of the second member, the second retaining being movable along the plate, and selectively fixed with respect to the plate.
The manipulating section may further has a coupling section connecting the plate to a socket of an endoscope, the socket being located at an inlet of a treatment instrument insertion channel of the endoscope.
The manipulating section may further has a second plate movable along and selectively fixed with respect to the first plate, wherein the first holding member is movable along the second plate and selectively fixed onto the second plate, and the second holding member is fixed onto the second plate.
The manipulating section may further has a second plate through which the first holding member is movable along the plate, and selectively fixed with respect to the plate.
Th
Esquivel Denise L.
Greenblum & Bernstein P.L.C.
Norman Marc
Pentax Corporation
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