U.S. patent application number 11/300174 was filed with the patent office on 2007-06-14 for method of lifting diseased part, tissue lifting system, and indwelling tool.
This patent application is currently assigned to OLYMPUS MEDICAL SYSTEMS CORP.. Invention is credited to Takayuki Suzuki.
Application Number | 20070135802 11/300174 |
Document ID | / |
Family ID | 38140399 |
Filed Date | 2007-06-14 |
United States Patent
Application |
20070135802 |
Kind Code |
A1 |
Suzuki; Takayuki |
June 14, 2007 |
Method of lifting diseased part, tissue lifting system, and
indwelling tool
Abstract
A method includes providing an indwelling tool having a magnetic
body at the inside of a luminal organ by inserting the tool into a
working channel inserted from a natural opening of a living body to
the luminal organ, in a manner such that an axis along a length of
the magnetic body is arranged substantially parallel to a length
direction of the working channel; disposing the tool in a vicinity
of a diseased part of the luminal organ; applying a magnetic field
to the magnetic body by using a magnetic field generating device
provided at the outside of the luminal organ, so as to attract the
magnetic body and make a side face of the magnetic body along the
axis thereof push against a tissue in the vicinity of the diseased
part; and lifting a tissue around a position of the tool, which
includes the diseased part, by applying a magnetic force to the
magnetic body by using the magnetic field generating device.
Inventors: |
Suzuki; Takayuki;
(Yokohama-shi, JP) |
Correspondence
Address: |
SCULLY SCOTT MURPHY & PRESSER, PC
400 GARDEN CITY PLAZA
SUITE 300
GARDEN CITY
NY
11530
US
|
Assignee: |
OLYMPUS MEDICAL SYSTEMS
CORP.
Tokyo
JP
|
Family ID: |
38140399 |
Appl. No.: |
11/300174 |
Filed: |
December 14, 2005 |
Current U.S.
Class: |
606/1 |
Current CPC
Class: |
A61B 17/0218 20130101;
A61B 2017/00876 20130101; A61B 17/08 20130101; A61B 17/0281
20130101 |
Class at
Publication: |
606/001 |
International
Class: |
A61B 17/00 20060101
A61B017/00 |
Claims
1. A method of lifting a diseased part, comprising the steps of:
providing an indwelling tool having a magnetic body at the inside
of a luminal organ by inserting the indwelling tool into a working
channel which is inserted from a natural opening of a living body
to the luminal organ, in a manner such that an axis along a length
of the magnetic body is arranged substantially parallel to a length
direction of the working channel; disposing the indwelling tool in
a vicinity of the diseased part produced in the luminal organ;
applying a magnetic field to the magnetic body by using a magnetic
field generating device which is provided at the outside of the
luminal organ, so as to attract the magnetic body and make a side
face of the magnetic body along the axis thereof push against a
tissue in the vicinity of the diseased part; and lifting a tissue
around a position of the indwelling tool, which includes the
diseased part, by applying a magnetic force to the magnetic body by
using the magnetic field generating device.
2. The method of lifting a diseased part, in accordance with claim
1, wherein the step of providing the indwelling tool at the inside
of the luminal organ includes a step of providing the indwelling
tool via the working channel which is of an endoscope having an
observation device, the endoscope being inserted from the natural
opening of the living body to the luminal organ.
3. A tissue lifting system comprising: an indwelling tool having an
anchor fit to the inside of a luminal organ of a living body, and a
magnetic body having an elongated shape, which is divided into two
magnetized polar parts on either end along a longitudinal axis of
the magnetic body, and a magnetic force generating device which is
provided at the outside of the luminal organ and has a magnetic
body having two poles arranged on an end thereof toward the luminal
organ, wherein said two poles correspond to said either end of the
magnetic body of the indwelling tool.
4. The tissue lifting system in accordance with claim 3, wherein at
least a part of a side face of the magnetic body of the indwelling
tool is a plane which is parallel to the longitudinal axis.
5. An indwelling tool comprising: an anchor fit to the inside of a
luminal organ; and a soft magnetic body which is magnetized when
being exposed in a magnetic field, wherein the soft magnetic body
has a side face along a longitudinal axis of the soft magnetic
body, the side face being pushed against a tissue inside the
luminal organ, and a non-magnetic material is attached to either
end of the magnetic body along the longitudinal axis.
6. The indwelling tool in accordance with claim 5, wherein at least
a part of a side face of the magnetic body is provided with a plane
which is parallel to the longitudinal axis.
7. An indwelling tool comprising: an anchor fit to the inside of a
luminal organ in a living body, and a magnetic body having an
elongated shape, which is divided into two magnetized polar parts
on either sides which interpose a longitudinal axis of the magnetic
body.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a method of lifting a
diseased part used in treatment performed in a living body, an
indwelling tool used for lifting a diseased part, and a tissue
lifting system including the indwelling tool.
[0003] 2. Description of the Related Art
[0004] A diseased part produced in a body of a patient is generally
removed or cauterized. In a relevant treatment, the body of the
patient may be opened in a surgical operation, or an endoscope is
inserted from the mouth or the anus of the patient. Japanese
Unexamined Patent Application, First Publication No. 2004-105247
(see FIGS. 6 to 11) shows an example of a method of removing a
diseased part produced in a luminal organ by using an endoscope. In
the method, first, an overtube is inserted into a diseased part of
a luminal organ, and then an endoscope is inserted through the
overtube. Next, a clip attachment tool is inserted through a
channel of the endoscope, and a clip at the head of the clip
attachment tool is attached to the diseased part. The endoscope is
once pulled out from the overtube, and a magnetic anchor is
inserted from the head of the endoscope through the channel. The
endoscope is again inserted into the overtube, so as to engage the
magnetic anchor with the clip. A magnetic induction member is
disposed outside the body of the patient, so that the magnetic
anchor is attracted due to magnetic force by the magnetic induction
member. The diseased part is pulled via the clip and lifted in the
luminal organ. The lifted diseased part is removed using a cutting
and removing tool inserted into the channel of the endoscope.
SUMMARY OF THE INVENTION
[0005] According to the first aspect of the present invention, a
method of lifting a diseased part includes the steps of providing
an indwelling tool having a magnetic body at the inside of a
luminal organ by inserting the indwelling tool into a working
channel which is inserted from a natural opening of a living body
to the luminal organ, in a manner such that an axis along a length
of the magnetic body is arranged substantially parallel to a length
direction of the working channel; disposing the indwelling tool in
a vicinity of the diseased part produced in the luminal organ;
applying a magnetic field to the magnetic body by using a magnetic
field generating device which is provided at the outside of the
luminal organ, so as to attract the magnetic body and make a side
face of the magnetic body along the axis thereof push against a
tissue in the vicinity of the diseased part; and lifting a tissue
around a position of the indwelling tool, which includes the
diseased part, by applying a magnetic force to the magnetic body by
using the magnetic field generating device.
[0006] According to the second aspect of the present invention, a
tissue lifting system includes an indwelling tool having an anchor
fit to the inside of a luminal organ of a living body, and a
magnetic body having an elongated shape, which is divided into two
magnetized polar parts on either end along a longitudinal axis of
the magnetic body; and a magnetic force generating device which is
provided at the outside of the luminal organ and has a magnetic
body having two poles arranged on an end thereof toward the luminal
organ, wherein said two poles correspond to said either end of the
magnetic body of the indwelling tool.
[0007] According to the third aspect of the present invention, an
indwelling tool includes an anchor fit to the inside of a luminal
organ; and a soft magnetic body which is magnetized when being
exposed in a magnetic field, wherein the soft magnetic body has a
side face along a longitudinal axis of the soft magnetic body, the
side face being pushed against a tissue inside the luminal organ,
and a non-magnetic material is attached to either end of the
magnetic body along the longitudinal axis.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a partially sectional view showing the structure
of an indwelling tool and an indwelling device as an embodiment in
accordance with the present invention.
[0009] FIG. 2 is a sectional view along line A-A in FIG. 1.
[0010] FIG. 3 is an enlarged view of a magnetic body.
[0011] FIG. 4 is a perspective view showing magnetic forceps.
[0012] FIG. 5 is a diagram showing a state in which an endoscope is
inserted into a luminal organ.
[0013] FIG. 6 is a diagram showing a state in which an indwelling
tool is made to protrude from an insertion pipe and a magnetic body
is hung from a clip.
[0014] FIG. 7 is a diagram showing the indwelling tool is
anchored.
[0015] FIG. 8 is a diagram showing a step of inserting the magnetic
forceps from an abdominal wall side.
[0016] FIG. 9 is a diagram showing a state in which a tissue
including a diseased part is lifted.
[0017] FIG. 10 is a diagram showing a state in which the magnetic
body is attracted by the magnetic forceps.
[0018] FIG. 11 is a diagram showing the structure of an indwelling
tool.
[0019] FIG. 12 is a diagram showing a state in which the magnetic
body is attracted by the magnetic forceps.
[0020] FIG. 13 is a diagram showing the structure of an indwelling
tool.
[0021] FIG. 14 is an enlarged and partially-broken view of a head
portion of the magnetic forceps.
[0022] FIG. 15 is a diagram showing a state in which the magnetic
body is attracted by the magnetic forceps.
[0023] FIG. 16 is a diagram showing the structure of an indwelling
tool.
[0024] FIG. 17 is a diagram showing a state in which the magnetic
body is attracted by the magnetic forceps.
PREFERRED EMBODIMENTS
[0025] Preferred embodiments of the present invention will be
explained below. In the embodiments, common structural elements are
given identical reference numerals or symbols, and duplicate
explanations are omitted.
First Embodiment
[0026] FIG. 1 shows an indwelling tool and an indwelling device
used in a first embodiment. The indwelling device 1 has an
operation section 2 handled by an operator. At a base end of a main
body 3 of the operation section 2, a ring 4 for a finger of the
operator is provided. A slider 5 is attached to the main body 3 in
a manner such that the slider 5 can freely slide. The slider 5 is
forced toward an end by a compressive-type coil spring 6. A pipe 7
is connected to the slider 5, and a wire is inserted through the
pipe 7. This wire passes through a coil sheath 9 which is fixed on
the head side of the main body 3, in a manner such that the wire
can be freely advanced or withdrawn. The coil sheath 9 passes
through an insertion pipe 10 in a manner such that the coil sheath
9 can freely advance or withdraw. The insertion pipe 10 is made of
plastic such as fluororesin or polyethylene resin. At a base end of
the insertion pipe 10, a grip 11 is provided, which is held by the
operator. The insertion pipe 10 and the coil sheath 9 are each long
and flexible, and are inserted into a working channel of an
endoscope (not shown). The wire 8 extending through the coil sheath
9 is fastened to the slider 5. A connection plate 16 for an
indwelling tool 15 is welded to the head of the wire 8.
[0027] As shown in FIGS. 1 and 2, the indwelling tool 15 consists
of the connection plate 16, a tube 17, a clip (or anchor) 18 and a
magnetic body 20. The connection plate 16 is welded to the wire 8,
so that the connection plate 16 passes through the tube 17 and is
pulled out from the head of the tube 17. A hook 19 is formed at the
head of the connection plate 16, and a loop portion 21 of the clip
18 is engaged with the hook 19. The clip 18 is made of a thin and
long member, a center portion of which is twisted so as to form the
loop portion 21. In a natural state, a pair of arms 22 are open
toward the head side.
[0028] The magnetic body 20 has a main body 25 whose base end forms
a holding portion 26 having a smaller outer diameter. The outer
diameter of the main body 25 is larger than the inner diameter of
the insertion pipe 10, and substantially the same as the outer
diameter of the insertion pipe 10. The holding portion 26 is
loosely fit to the inner periphery of the insertion pipe 10 by
press fitting or the like. The (longitudinal) axis of the magnetic
body 20 is sufficiently longer than the diameter thereof. The axis
of the magnetic body 20 substantially coincides with the length
direction of a head portion of the indwelling device 1. A magnetic
body (or material) is made either of a soft magnetic body or a hard
magnetic body. In the present embodiment, the magnetic body 20 is
made of a hard magnetic material.
[0029] As shown in an enlarged view of FIG. 3, the magnetic body 20
is divided into two magnetized polar parts with respect to a plane
(as a boundary) positioned parallel to the axis of the magnetic
body 20: one is a part 20A as an N pole, and the other is a part
20B as an S pole. A boundary line L1 between the poles matches the
position of the axis of the magnetic body 20; however, the boundary
line L1 may be offset from the position of the axis of the magnetic
body 20.
[0030] As shown in FIG. 1, the holding portion 26 has a through
hole 27 arranged substantially perpendicularly to the axis of the
holding portion 26, wherein a groove 28, which includes the opening
of the through hole 27, is formed toward the base end of the
holding portion 26. A wire 29 is inserted through the through hole
27 and passes through the groove 28, and further passes inside the
loop portion 21 of the clip 18, so as to form a circular shape.
[0031] FIG. 4 shows magnetic forceps used in the present
embodiment. Magnetic forceps 30 as a magnetic force generating
device have a pipe-shaped insertion portion 31 whose head portion
is closed by a cover 31A. A pusher rod 31B is inserted into the
insertion portion 31, and a magnet 32 is fastened to the head of
the pusher rod 31B. At the base end of the insertion portion 31, an
operation section 33 is provided. The magnet 32 in the insertion
portion 31 can be approached toward or withdrawn from the cover 31A
by operating a lever 33A of the operation section 33. The insertion
portion 31 passes through a cylindrical sheath 34 made of a hard
material. Detailed explanations of the structure and the method of
using the magnetic forceps 30 are disclosed in U.S. patent
application Ser. No. 11/076,662, related to the applicant of the
present patent application, where the contents disclosed in U.S.
patent application Ser. No. 11/076,662 are incorporated in the
present embodiment.
[0032] The operation of the present embodiment will be
explained.
[0033] As shown in FIG. 5, an endoscope 41 is inserted from a
natural opening (e.g., a mouth, an anus, a nose, or an ear) of a
living body into a luminal organ W1. The inside of the luminal
organ W1 is observed using an illumination device 42 and an
observation device 43 which are provided at the head of the
endoscope 41, so as to confirm a diseased part W2 produced inside
the luminal organ W1. The indwelling device 1, to which the
indwelling tool 15 (used first) is attached, is inserted through a
working channel 44 of the endoscope 41. Here, the head of the
indwelling device 1 is inserted along the axis (i.e., the length)
of the working channel 44. Therefore, the magnetic body 20 of the
indwelling tool 15 is inserted in a manner such that the axis of
the magnetic body 20 is in parallel with the axes of the working
channel 44 and the endoscope 41.
[0034] Then, the grip 11 (shown in FIG. 1) of the indwelling device
1 is held so as to fix the insertion portion 10 and push the
operating section 2, so that the coil sheath 9 and the indwelling
tool 15 protrude from the head opening of the insertion pipe 10.
The clip 18 is directed to a tissue in the vicinity of the diseased
part W2 of the luminal organ W1, so as to secure a specific
distance between the diseased part W2 and the clip 18. As shown in
FIG. 6, the clip 18 proceeds together with the coil sheath 9 so as
to push out the magnetic body 20 from the insertion pipe 10. The
magnetic body 20 and the clip 18 are coupled with each other via
the wire 29; thus, the magnetic body 20 does not fall.
[0035] The clip 18 is directed to a tissue in the vicinity of the
diseased part W2 of the luminal organ W1, so as to secure a
specific distance between the diseased part W2 and the clip 18.
When the slider 5 is pulled, the wire 8 pulls the connection plate
16, and the loop portion 21 is drawn into an inner hole 17A of the
tube 17, so that the pair of arms 22 open. While the arms 22 are
open, the clip 18 is pushed onto a tissue at the indwelling
position. When the slider 5 is pulled, the loop portion 21 is drawn
into the tube 17, and the arms 22 are pushed onto an end of the
tube 17, so that the clip 18 closes and a living tissue is clipped
between the arms 22 of the clip 18. When the slider 5 is further
pulled, the bending portion of the hook 19 formed at the head of
the connection plate 16 is finally released and linearlized, so
that engagement between the connection plate 16 and the loop
portion 21 is released and the indwelling tool 15 is isolated from
the indwelling device 1. When the coil sheath 9 and the insertion
pipe 10 are withdrawn, the indwelling tool 15, which clips the
tissue, stays and indwells as shown in FIG. 7. The magnetic body 20
is present in the vicinity of the clip 18 via the wire 29. Here,
the clip 18, fit to the tube 17, keeps the closed state. Another
method of connecting the indwelling tool 15 and the wire 8, and
more detailed description for the indwelling process are disclosed
in US Patent Application Publication, No. US2002/0173805A1, related
to the Applicant of the present patent application. The contents
disclosed in US2002/0173805A1 are incorporated into the present
embodiment.
[0036] After the indwelling tool 15 is anchored, the endoscope 41
is pulled out from the luminal organ W1. As shown in FIG. 8, two
holes are formed in an abdominal wall W4, the positions of the
holes being close to the diseased part W2, and a forceps port W5 is
inserted into each hole.
[0037] The magnetic forceps 30 are inserted into the first forceps
port W5, and cutting forceps 50 are inserted into the second
forceps port W5. The lever 33A of the operation section 33 of the
magnetic forceps 30 (see FIG. 4) is pulled so as to make the magnet
32 approach the cover 31A on the head side. As shown in FIG. 9, due
to a magnetic field generated by the magnet 32 of the magnetic
forceps 30, the magnetic body 20 is magnetized and is attracted so
that the magnetic body 20 contacts an inner wall of the luminal
organ W1 in a manner such that an outer peripheral face 25A as a
side face of the main body 25 along the axis thereof faces the
magnet 32. As shown in FIG. 10, when the magnetic forceps 30 are
made to approach the luminal organ W1 from the outside thereof, the
magnetic body 20 is directed in correspondence to the magnetic pole
of the magnet 32 of the magnetic forceps 30. When the N pole of the
magnetic forceps 30 faces the luminal organ W1, the side face 25A
on the part 20B side (as the N pole) contacts the inner wall of the
luminal organ W1.
[0038] Accordingly, the indwelling tool 15 moves toward the
magnetic forceps 30. When the indwelling tool 15 is attracted to
the magnetic forceps 30 and moves, a tissue (including the diseased
part W2) in the vicinity of the indwelling tool 15 is also
attracted toward the magnetic forceps 30. As a result, in the
luminal organ W1, the tissue including the diseased part W2
protrudes toward the abdominal wall W4. In other words, the
position of the tissue including the diseased part W2 is offset
from its natural position toward the abdominal wall W4 (i.e., the
tissue is lifted to the abdominal wall W4 side). The cutting
forceps 50 are then inserted into the second forceps port W5, so as
to cut a peripheral line (see a dashed line in FIG. 9) around the
position of the indwelling tool 15 and to remove a bent portion of
the luminal organ W1. The isolated tissue is extracted from the
second forceps port W5, and the remaining parts of the luminal
organ W1 are seamed together.
[0039] In the present embodiment, the indwelling tool 15 having the
magnetic body 20 is made to indwell in the vicinity of the diseased
part W2. Therefore, when the magnetic forceps 30 are made to
approach from the outside of the luminal organ W1 so as to attract
the magnetic body 20, a tissue including the diseased part W2 can
be lifted toward the abdominal wall W4. Accordingly, it is possible
to reliably isolate the diseased part W2 from the other tissues
such as other luminal organs or other kinds of organs and to easily
remove the diseased part W2. In addition, the magnetic body 20 is
divided into two magnetized polar parts on either side of a plane
parallel to the axis of the magnetic body 20; thus, the outer
peripheral face 25A along the axis of the main body 25 contacts a
tissue, so that a wide area can contact the tissue. Therefore, less
burden is imposed on the tissue.
Second Embodiment
[0040] FIG. 11 shows a magnetic body used in the present
embodiment. A magnetic body unit 60 has a cylindrical main body 61
made of a soft magnetic material in the present embodiment, where a
soft magnetic body (may also be called the soft magnetic material)
is a magnetic body which loses its magnetic property when magnetic
effects are excluded. That is, when being laid in a magnetic field,
the soft magnetic body is magnetized, and when being extracted from
the magnetic field (i.e., the magnetic field is removed), the soft
magnetic body is substantially demagnetized. As a material for the
soft magnetic body, iron, pure iron, silicon iron, Permalloy iron,
or the like, are known.
[0041] The length along the axis of the main body 61 is
sufficiently larger than the diameter of the main body 61. A first
part 62 made of a non-magnetic material is fastened to an end 61A
along the length of the main body 61. The first part 62 has the
same outer diameter as that of the main body 61, and an end of the
first part 62 has a spherical shape. To another end 61B of the main
body 61 along the length thereof, a second part 63 made of a
non-magnetic material is fastened. The second part 63 has the same
outer diameter as that of the main body 61, and an end of the
second part 63 forms the holding portion 26 having a smaller
diameter. In the holding portion 26, the through hole 27 and the
groove 28 are formed, through which the wire 29 passes. The first
part 62 and the second part 63 may be made of rubber, resin, or the
like.
[0042] The magnetic body unit 60, the wire 29, the clip 18, the
tube 17, and the connection plate 16 form an indwelling tool 65
attached to the indwelling device 1. The outer diameter of the main
body 61 is substantially the same as that of the insertion pipe 10.
The holding portion 26 of the second part 63 can be loosely fit to
the insertion pipe 10. When the indwelling tool 65 is attached to
the indwelling device 1, the axis of the main body 61 coincides
with the axis of the head portion of the indwelling device 1.
[0043] The operation of the present embodiment will be explained
below.
[0044] The indwelling device 1 to which the indwelling tool 65 is
attached is inserted through the working channel 44 of the
endoscope 41 to the vicinity of the diseased part W2. In this
process, the axis of the magnetic body unit 60 is arranged
substantially parallel to the axis (i.e., the length) of the
working channel 44 and the axis of the endoscope 41. When the wire
8 is withdrawn and the clip 18 of the indwelling tool 65 is
anchored to a peripheral part of the diseased part W2, the magnetic
forceps 30 are made to approach from the outside of the luminal
organ W1, so that the main body 61 of the magnetic body unit 60 is
magnetized due to the magnetic field produced by the magnetic
forceps 30 and is attracted toward the magnetic forceps 30.
[0045] As shown by dashed lines in FIG. 12, when the magnetic body
unit 60 is arranged in a manner such that the second part 63
contacts an inner wall of the luminal organ W1 and the magnetic
body unit 60 is erected on this contact point, the magnetic body
unit 60 falls with respect to a fulcrum on the second part 63 side.
The second part 63 is made of a non-magnetic material. Therefore,
regarding the distance from the main body 61 of the magnetic body
unit 60 to the magnet 32 of the magnetic forceps 30, a distance L3,
measured when the magnetic body unit 60 is laid, that is, when an
outer peripheral face 61C, which is a side face of the main body
61, faces the magnet 32, is less than a distance L2, measured when
the magnetic body unit 60 is erected, that is, the axis of the
magnetic forceps 30 is substantially in parallel to the axis of the
magnetic body unit 60, thereby generating a strong attraction.
Therefore, the magnetic body unit 60 is more stable when the outer
peripheral face 61C of the main body 61 along the axis thereof
faces the magnetic forceps 30. In accordance with this position,
the outer peripheral face 61C of the main body 61 pushes against an
inner wall of the luminal organ W1, so that a portion around a
center point where the indwelling tool 65 is anchored is lifted.
When the magnetic body unit 60 is erected on the first part 62
side, the magnetic body unit 60 falls with respect to a fulcrum on
the first part 62 side, so that the outer peripheral face 61C of
the main body 61 faces the magnet 32. The following steps in the
operation are the same as those of the first embodiment.
[0046] In the present embodiment, both ends (i.e., the first part
62 and the second part 63) of the magnetic body unit 60 are each
made of a non-magnetic material; thus, when the magnetic forceps 30
are made to approach, an inner wall of the luminal organ W1 can
always be pushed by the outer peripheral face 61C of the main body
61. Here, the magnetic body unit 60 must be a long form so as to be
inserted through the working channel 44. Therefore, in comparison
with the area of either end of the magnetic body unit 60, the area
of the outer peripheral face 61C is considerably larger.
Accordingly, in comparison with a case in which either end of the
magnetic body unit 60 closely contacts a tissue, a wider contact
area can be secured when the outer peripheral face 61C contacts a
tissue, so that the position of the magnetic body unit 60 can be
stable in attraction using the magnetic forceps 30. In addition,
less burden is imposed on the tissue pushed by the magnetic body
unit 60, and the direction of the magnetic body unit 60 can
coincide with that of the magnet 32.
Third Embodiment
[0047] FIG. 13 shows a magnetic body used in the present
embodiment. A magnetic body 70 has a cylindrical shape and is made
of a permanent magnet. The magnetic body 70 has a cylindrical main
body 71 having a spherical head, and a holding portion 72 having a
lesser diameter, formed on the base side of the main body 71. The
axis along the length of the magnetic body 70 is sufficiently
longer than the diameter of the main body 71. The main body 71 is
divided into two magnetized polar parts with respect to a line
perpendicular to the axis of the main body 71, the line being
positioned near the center along the length of the main body 71:
one is a part 70A as an N pole on the head side, and the other is a
part 70B as an S pole on the base side.
[0048] The magnetic body 70, the wire 29, the clip 18, the tube 17,
and the connection plate 16 form an indwelling tool 75 which is
attached to the indwelling device 1. The outer diameter of the
magnetic body 70 is substantially the same as that of the insertion
pipe 10. The holding portion 72 can be loosely fit to the insertion
pipe 10. When the indwelling tool 75 is attached to the indwelling
device 1, the axis of the magnetic body 70 coincides with the axis
of the head portion of the indwelling device 1.
[0049] FIG. 14 shows magnetic forceps 80 as a magnetic field
generating device used in the present embodiment. In the magnetic
forceps 80, a magnet 82 is contained in an insertion portion 81 in
a manner such that the magnet 82 can freely be advanced or
withdrawn. The magnet 82 is divided into two magnetized polar parts
which are arranged parallel along the length of the insertion
portion 81: one is a part 82A as an N pole and the other is a part
82B as an S pole.
[0050] The operation of the present embodiment will be explained
below.
[0051] The indwelling device 1 to which the indwelling tool 75 is
attached is inserted through the working channel 44 of the
endoscope 41 to the vicinity of the diseased part W2. In this
process, the axis of the magnetic body 70 is arranged substantially
parallel to the axis (i.e., the length) of the working channel 44
and the axis of the endoscope 41. When the clip 18 of the
indwelling tool 75 is anchored to a peripheral part of the diseased
part W2, the magnetic forceps 80 are made to approach from the
outside of the luminal organ W1.
[0052] Accordingly, the N pole of the magnet 82 of the magnetic
forceps 80 is attracted to the part 70B (i.e., the S pole) of the
magnetic body 70, and the S pole of the magnet 82 of the magnetic
forceps 80 is attracted to the part 70A (i.e., the N pole) of the
magnetic body 70. As shown in FIG. 15, in the magnetic body 70, a
side face of the main body 71 along the axis of the magnetic body
70, that is, an outer peripheral face 71C contacts an inner plane
of the luminal organ W1. The following steps are the same as those
of the first embodiment.
[0053] In the present embodiment, the magnetic body 70 is divided
into two magnetized polar parts which are arranged along the length
of the magnetic body 70; thus, the outer peripheral face 71C of the
main body 71 of the magnetic body 70 can be reliably attracted
using the magnet 82. The magnetic body 70 must be a long shape so
as to be inserted through the working channel 44; thus, the area of
the outer peripheral face 71C is considerably larger than the area
of either end of the magnetic body 70 along the length thereof.
Therefore, in comparison with a case in which either end of the
magnetic body 70 closely contacts a tissue, a wider contact area
can be secured when the outer peripheral face 71C contacts a
tissue. Accordingly, the position of the magnetic body 70 can be
stable in attraction using the magnetic forceps 80. In addition,
less burden is imposed on the tissue pushed by the magnetic body
70, and the direction of the magnetic body 70 can coincide with
that of the magnet 82.
Fourth Embodiment
[0054] FIG. 16 shows a magnetic body used in the present
embodiment. A magnetic body 90 has a long main body 91 and a
holding portion 92 extending from a base portion of the main body
91. The main body 91 has a plane 93 (i.e., a side face) parallel to
the axis along the length of the main body, which is produced by
cutting a part of a cylindrical shape. The head of the main body 91
has a spherical shape. The main body 91 is made of a permanent
magnet and is divided into N and S polar parts which are arranged
parallel to the plane 93. In FIG. 16, a part 91A on the plane 93
side is the N polar part, and a part 91B on the opposite side is
the S polar part which includes no cut or removed part.
[0055] The magnetic body 90, the wire 29, the clip 18, the tube 17,
and the connection plate 16 form an indwelling tool 95 which is
attached to the indwelling device 1. The outer diameter of the main
body 91 of the magnetic body 90 is substantially the same as that
of the insertion pipe 10. The holding portion 92 can be loosely fit
to the insertion pipe 10. When the indwelling tool 95 is attached
to the indwelling device 1, the axis of the magnetic body 90
coincides with the axis of the head portion of the indwelling
device 1.
[0056] The operation of the present embodiment will be explained
below.
[0057] The indwelling device 1 to which the indwelling tool 95 is
attached is inserted through the working channel 44 of the
endoscope 41 to the vicinity of the diseased part W2. In this
process, the axis of the magnetic body 90 is arranged substantially
parallel to the axis of the working channel 44 and the axis of the
endoscope 41. When the clip 18 of the indwelling tool 95 is
anchored to a peripheral part of the diseased part W2, the magnetic
forceps 30 are made to approach from the outside of the luminal
organ W1.
[0058] As shown in FIG. 17, the magnetic body 90 is attracted in a
manner such that the plane 93 (i.e., the S pole) faces the N pole
of the magnet 32 of the magnetic forceps 30. As shown by imaginary
lines, if the magnetic body has a circular section, the center part
of the magnetic body, which is closer to the magnet 32 (refer to a
distance L4), is attracted by a stronger magnetic force; however,
the further the position from the center part, the more rapidly the
distance to the magnet 32 (see a distance L5) increases and the
attraction force decreases. In contrast, in the magnetic body 90, a
wide area of the plane 93 closely contacts a tissue at a distance
L6 which is shorter than the distance L5, so that a stable and
large magnetic force is applied to the magnet 32. Therefore, in
comparison with a case in which the magnetic body 90 has a circular
section, a tissue (including the diseased part W2) around the
indwelling tool 95 can be attracted toward the magnetic forceps 30
by a stronger attraction force and be lifted toward the abdominal
wall W4. The following steps are the same as those of the first
embodiment.
[0059] In the present embodiment, the plane 93 is provided in the
magnetic body 90 having a long and cylindrical shape, which can be
inserted into the working channel 44. Therefore, when the plane 93
is made to face the magnetic forceps 30, the plane 93 can closely
contact the inside of the luminal organ W1. In this process, a
wider area is attracted toward the magnet 32 in comparison with an
end of the magnetic body 90; thus, the position of the magnetic
body 90 can be stable. In addition, an area which contacts the
tissue can be increased, thereby reducing a burden imposed on the
tissue.
[0060] The present invention can be widely applied without being
limited to the disclosed embodiments.
[0061] For example, the magnetic body may have a polygonal section
formed perpendicularly to the axis thereof. The working channel 44
may be a channel attached to an outer periphery of the endoscope
41. A plurality of indwelling tools may be disposed around the
diseased part W2 so that a magnetic body of each indwelling tool is
attracted so as to lift a tissue including the diseased part
W2.
[0062] The working channel 44 may not be integrally provided
together with the endoscope 41. For example, while observation is
performed using an observation device (e.g., a capsule endoscope)
which can be swallowed, a working channel having no observation
function may be introduced into a living body, so as to perform
treatment as described above (the working channel may have an
observation function; however, one having no observation function
can be thinner, and a burden imposed on the patient can be much
more reduced).
* * * * *