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JPH09224940

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH09224940
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic probe which is inserted into a body cavity to conduct an ultrasonic examination, and in
particular, an ultrasonic transducer having a plurality of ultrasonic transducers arranged in a
row, The present invention relates to an ultrasonic probe which is mounted on a rotating body
having a rotational axis in the direction of rotation and rotates the rotating body to obtain an
ultrasonic tomographic image in a desired direction.
[0002]
2. Description of the Related Art As an ultrasonic probe, a multi-plane type ultrasonic probe in
which ultrasonic tomograms of various directions can be obtained by rotating an ultrasonic
transducer in which a large number of ultrasonic transducers are arrayed is provided. For
example, as shown in, for example, Japanese Patent Application Laid-Open No. 6-261901, it is
conventionally known. Therefore, an ultrasonic probe according to this prior art will be described
based on FIGS. 1 to 3. FIG.
[0003]
First, FIG. 1 shows the entire configuration of the ultrasonic probe. In the figure, 1 is an insertion
portion into a body cavity, 2 is a tip end body, and 3 is a body operation portion. The insertion
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portion 1 is a soft portion 1a from the side where the main body operation portion 3 is
continuously provided. The flexible portion 1a is provided with an angle portion 1b at the tip of
the soft portion 1a and a tip portion main body 2 at the angle portion 1b. Be done. Here, the
flexible portion 1a is bent in an arbitrary direction along the insertion path into the body cavity,
and the angled portion 1b is bent in a desired direction by a bending operation to turn the tip
portion main body 2 in an arbitrary direction. is there. Furthermore, a cable cord 4 is extended in
the main body operation unit 3, and a connector portion 5 is provided at an end portion of the
cable cord 4, and the connector portion 5 is used as an ultrasonic observation device (not
shown). It is connected detachably.
[0004]
Reference numeral 6 denotes an ultrasonic transducer, which performs an electronic scan, and is
constituted by arranging a plurality of strip-shaped ultrasonic transducers 6a in a row. When the
ultrasonic transducer 6 is activated, ultrasonic scanning can be performed in a fixed line. The
ultrasonic transducer 6 can be rotated in the horizontal direction centering on the central portion
of the transmitting and receiving surface, and when it is rotated by a predetermined angle, the
ultrasonic scanning line can be displaced in the rotational direction. Therefore, if ultrasonic
scanning is performed at every predetermined angle while rotating the ultrasonic transducer 6, it
is three-dimensionally grasped in a predetermined cylindrical (in linear scanning) or conical (in
sector scanning) range in the body. It is possible to obtain tissue fault information that can be
[0005]
The rotational drive mechanism of the ultrasonic transducer 6 is shown in FIG. 2 and FIG. First,
FIG. 2 shows a cross section of the tip end main body 1 a, 10 shows a casing of the tip end main
body 1 a, and the ultrasonic transducer 6 is provided in the casing 10. The ultrasonic transducer
6 is made of a laminate, and in the laminate, the lowermost layer is the backing material 11, and
the ultrasonic transducer 6a is laminated on the backing material 11. The acoustic matching
layer 12 is stacked on the ultrasonic transducer 6 a, and the acoustic lens 13 is stacked on the
acoustic matching layer 12. The backing material 11 of the ultrasonic transducer 6 is fixed on
the rotating body 14. The acoustic lens 13 faces the acoustic window 15 attached to the opening
10 a provided in the casing 10, and the seal member 16 is attached between the acoustic window
15 and the casing 10 and between the casing 10 and the acoustic lens 13. The space between
the acoustic lens 13 and the acoustic window 15 is sealed, and an acoustic transmission medium
such as liquid paraffin is injected therein.
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[0006]
In order to rotate the ultrasonic transducer 6, the rotating body 14 is rotatably supported on the
rotating shaft 17. The rotation shaft 17 extends in a direction orthogonal to the transmission /
reception surface of the ultrasonic transducer 6 and is fixed to the casing 10. The rotating body
14 is rotationally driven by remote control, and for this purpose, a pair of ultrasonic operating
wires 18, 18 are connected to the rotating body 14, and one ultrasonic operating wire is pulled
and the other By pushing out the sonic operating wire, the rotating body 14 is rotated. Further, in
addition to the ultrasonic operation wire 18, in order to bend the angle portion 1b, angle
operation wires 19, 19 which are also a pair are provided. The ultrasonic operation wire 18 and
the angle operation wire 19 extend from the insertion portion 1 into the main body operation
portion 3 and are provided in the casing of the main body operation portion 3 and wound around
the pulleys 20 and 21. The rotary shafts 20a and 21a of the pulleys 20 and 21 project from the
casing and are connected to the operation knobs 20b and 21b, respectively. Therefore, by
rotating the operation knobs 20b and 21b, the pair of operation wires 18 and 19 are pushed and
pulled.
[0007]
As shown in FIG. 2, the ultrasonic operating wire 18 is inserted into a connecting pipe 22 which
is inserted through the base end side partition wall 10b of the casing 10, and the connecting pipe
22 is a flexible coil made of an adhesive coil or the like. The sleeve 23 is connected, and at a
portion in the angle portion 1b and the flexible portion 1a, the sleeve 23 is inserted into the
flexible sleeve 22 formed of the close-contact coil to form a control cable as a whole. In addition,
the angle control wire 19 is fixed to the most advanced angle ring forming the angle portion 1b
or the casing 10 of the tip portion main body 1a, and is positioned at a predetermined position in
the circumferential direction in the angle portion 1b. The control cable is formed by connecting
the angled portion 1b and the flexible portion 1a through the connecting pipe and through the
flexible sleeve which is also formed of the close-contact coil or the like. Further, a cable is
connected to each of the ultrasonic transducers 6a constituting the ultrasonic transducer 6, and
the cable is bundled by using an electrically insulating tape or the like in the angle portion 1b
and the flexible portion 1a. , And the cable bundle 24 is inserted.
[0008]
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In the insertion portion 1, at least the cable bundle 24, the ultrasonic operation wire 18 and the
angle operation wire 19 are inserted, and all of them are in any direction in the insertion portion
1. It is a flexible structure that bends, and no special position restriction is performed in the
insertion portion 1. Therefore, when the insertion portion 1 is inserted into a body cavity, etc.,
the mutual members are entangled or rubbed, and the respective members come in sliding
contact with the inner surface of the insertion portion 1. For this purpose, for example, a powder
of molybdenum disulfide is enclosed as an antifriction material in the insertion portion 1 in order
to prevent the tape or the like that bundles the cable bundle 24 from being worn or damaged by
friction. It has become so. Molybdenum disulfide powder is necessary in the insertion part 1, but
since the tip end main body 2 is made of a hard member, not only such an antifriction material is
not necessary, but also the casing of the tip end main body 2 If it enters into 10, it may be caught
in the sealing material 16 with the rotation of the rotating body 14 and may intrude into a
portion between the acoustic lens 13 and the acoustic window 15. When such a situation occurs,
the acoustic transmission medium made of liquid paraffin or the like injected to this site is
contaminated, and may be discolored or degraded. In addition, there are wear debris and other
foreign matter of the close-contact coil that constitutes the flexible sleeve in the insertion portion
1, and it is not preferable that these foreign matters also get into the tip end main body 2.
[0009]
In order to prevent the acoustic transmission medium from being contaminated by the
molybdenum disulfide powder or the like, it is necessary to define a space between the insert 1 in
which it is enclosed and the tip body 2. The members that extend from the distal end portion
body 2 to the insertion portion 1 are the ultrasonic operation wire 18 and the cable bundle 24.
Therefore, it is conceivable to make the partition wall provided between the distal end portion
main body 2 and the insertion portion 1 airtight and insert the connection pipe 22 and the cable
bundle 24 through which the ultrasonic operation wire 18 is inserted. . By this, the molybdenum
disulfide powder hardly infiltrates the tip portion 2 side.
[0010]
However, even if a partition wall is provided and sealed, it is not always possible to completely
prevent the molybdenum disulfide powder from entering the tip end main body 2. That is, since
the ultrasonic operation wire 18 is movably inserted into the connection pipe 22, a gap is
generated therebetween. Moreover, in the insertion portion 1, since the ultrasonic operation wire
18 is inserted into the flexible sleeve 23 formed of the close-contact coil, the molybdenum
disulfide powder intrudes into the flexible sleeve 23 from the gap of the close-contact coil, At the
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time of the pushing and pulling operation of the sonic operating wire 18, the molybdenum
disulfide powder thus intruded is fed forward and passes through the connecting pipe 22 into
the tip end main body 2. It is possible to make the flexible sleeve 23 airtight by attaching the
flexible tube to the flexible sleeve 23 or the like, but if doing so, the outer diameter of the flexible
sleeve 23 becomes large, and the inclusion of the insertion portion 1 In addition to the increase
in the filling rate, the flexibility is also reduced.
[0011]
The present invention has been made in view of the above points, and the object of the present
invention is to ensure that foreign substances such as molybdenum disulfide powder can be
prevented from intruding from the insertion portion into the tip end main body. It is.
[0012]
SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present
invention provides a connection in which an ultrasonic operating wire is connected from the
inside of a flexible sleeve consisting of an adhesive coil to the tip of this flexible sleeve in the
insertion section. The connection pipe is inserted into the pipe, and the connection pipe is
disposed to penetrate the partition wall between the insertion portion and the tip end body, and
the connection pipe is positioned in the connection pipe of the ultrasonic operation wire. It is
characterized in that the seal member which slides on the inner surface is fixedly provided.
[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When inserting a member
extending from the tip end body into the insertion portion into the partition wall, the outer wall
portions of the members are made airtight by filling the partition wall with a sealing material or
the like. Easy to do.
However, since the ultrasonic operating wire is inserted into the connecting pipe and moves in
the axial direction in the connecting pipe, it can not be prevented that a gap is formed with the
inner surface of the connecting pipe.
Here, since the connection pipe is formed of a hard member, a seal member is fixedly provided
on the ultrasonic operation wire, and the seal member is closely fitted into the connection pipe
made of the hard member, Seal. This can prevent foreign matter such as molybdenum disulfide
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powder from intruding into the tip end main body from the inside of the connecting pipe.
[0014]
As also shown in FIG. 2, the rotating body is disposed in the vicinity of the inner wall of the
casing, and it is necessary to wind the ultrasonically operating wire extended in the axial
direction of the insertion portion around this rotating body. The connecting pipe is in a straight
state from the insertion portion to the portion introduced into the tip end body, but is bent in the
tip end body. The sealing member can not pass through this bent portion. Therefore, the length
of the straight portion of the connecting pipe is made longer than the moving stroke of the
ultrasonic operating wire so that it does not deviate from the connecting pipe and does not enter
the bent portion when pushing and pulling the ultrasonic operating wire. Here, even if the
ultrasonic observation field of view is kept 360 °, it suffices to rotate the ultrasonic transducer
by 180 ° at the maximum. For this reason, the movement stroke of the ultrasonic operating wire
is determined from the diameter of the winding portion of the ultrasonic operating wire in the
rotating body. Therefore, the straight portion of the connecting pipe does not greatly protrude
into the angle portion which is a flexible tube structure if it has a necessary minimum length in
consideration of the movement stroke.
[0015]
Since the seal member slides in the connecting pipe, it is necessary to minimize the load on the
push operation of the ultrasonic operation wire. For this purpose, it is preferable to form the seal
member with a member having good slidability, such as, for example, a fluorine resin. In addition,
the inner surface of the connecting pipe is also processed so as to have good slidability, for
example, coating of a member with good sliding. Thus, the ultrasonic operation wire can be
smoothly moved in a state where the insertion portion and the tip portion main body are sealed
in the connection pipe, and pressing of the ultrasonic operation wire performed by operating the
operation knob The pulling operation can be performed with a light load.
[0016]
As a matter of course, to improve the sealability between the seal member and the inner surface
of the connecting pipe, since the ultrasonic operation wire is inserted into the seal member, the
insertion portion of the ultrasonic operation wire of the seal member is also airtight. It must be
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secured and secured to ensure that the ultrasonic manipulation wire and the seal member do not
separate. For this purpose, for example, the front and rear end surfaces of the seal member are
brazed. Since the ultrasonic manipulation wire is usually formed by twisting a very thin metal
wire, the weir penetrates into the ultrasonic operation wire, and the weir is stably held for
ultrasonic manipulation The seal between the wire and the wire is removed, and the weir serves
as a control wall to hold the seal material so as not to be displaced back and forth.
[0017]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present
invention will be described below with reference to FIGS. In the following description, members
which are the same as or equivalent to those of the prior art will be described using the same
reference numerals. Further, the configuration on the main body operation unit side is not
particularly different from that of the prior art, so the illustration and description thereof will be
omitted.
[0018]
FIG. 4 shows a cross section of the distal end portion main body 2 and the insertion portion 1 in
the vicinity of the distal end portion main body 2, and FIG. 5 shows a cross section of a portion
XX in FIG. Furthermore, the cross section of the principal part of a connection pipe is shown in
FIG. The cable bundle 30 and the ultrasonic operation wire 31 extend through the proximal end
partition wall 10b of the casing 10 in the distal end main body 2 into the insertion portion 1, and
the cable bundle 30 itself is a proximal end. The ultrasonic operation wire 31 is inserted into the
side partition wall 10b, and is inserted into the connection pipe 32 inserted into the proximal end
partition wall 10b. A flexible sleeve 33 made of a close-contact coil is connected to an end of the
connection pipe 32, and the ultrasonic operation wire 31 is extended in the flexible sleeve 33.
The above points are not particularly different from those of the prior art described above.
[0019]
34 is a sealing material, and the sealing material 34 is filled in a connection ring 35 for
connecting the distal end portion main body 2 and the insertion portion 1, and the cable bundle
30 and the connection pipe in the proximal end partition wall 10b It seals 32 insertion parts.
Thereby, the airtightness between the tip end main body 2 and the insertion portion 1 is secured
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at least at the portion of the cable bundle 30. Further, the insertion portion of the proximal end
side partition wall 10b in the connection pipe 32 is also kept airtight.
[0020]
However, the seal member 34 can not maintain the airtightness of the insertion portion of the
ultrasonic operation wire 31 into the connection pipe 32. Therefore, the sliding seal member 36
is fitted and fixed to the ultrasonic operation wire 31, and the sliding seal member 36 is closely
fitted in the connection pipe 32 and slidably disposed, so that the connection pipe 32 is I try to
seal the inside. Since the sliding seal member 36 slides in the connecting pipe 32, the sliding seal
member 36 is formed of a member having a good sliding property such as, for example, fluorine
resin, and the inner surface of the connecting pipe 32 is also coated with a good lubricity. .
[0021]
As apparent from FIG. 4, the connecting pipe 32 is a straight portion 32 a having a
predetermined length from the base end side partition wall 10 b toward the insertion portion 1,
and from a position beyond the base end side partition wall 10 b Is a bent portion 32b bent
downward. Accordingly, since the sliding seal member 36 has a predetermined length in the axial
direction, the range in which it can be slidingly displaced is only this linear portion 32a, and it is
possible that the sliding seal member 36 is slid to the bent portion 32b. If the dynamic seal
member 36 enters, there is a risk of locking. Of course, since the connecting pipe 32 is a rigid
pipe, it can not be extended into the angle portion 1 b constituting the insertion portion 1.
[0022]
When performing ultrasonic scanning with the ultrasonic transducer 6, in order to be able to
scan in any direction of 360 °, the rotating body 14 may be rotated by 180 °. Therefore, the
push and pull stroke of the ultrasonic operation wire 31 is limited to the stroke necessary for
rotating the rotary body 14 by 180 °. For this purpose, for example, by providing a stopper on
the operation knob 20b, the rotation angle of the operation knob 20b may be restricted or the
movement stroke of the ultrasonic operation wire 31 may be directly restricted. Furthermore,
although the straight portion 32a of the connecting pipe 32 is made longer than the push and
pull stroke of the ultrasonic operation wire 31, it is made not to have a length more than
necessary. In addition, at the position where the ultrasonic transducer 6 is rotated by 90 ° from
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the origin position, the portion on which the sliding seal member 36 of both ultrasonic operation
wires 31 is mounted is arranged at the intermediate position of the straight portion 32 a of the
connecting pipe 32. Set
[0023]
The present embodiment is configured as described above, in which the insertion portion 1 is
inserted from the tip end main body 2 into the body cavity of the patient, and the tip end main
body 2 is to be subjected to a predetermined examination / diagnosis. Lead up. In this state, by
operating the ultrasonic transducer 6, information on a tissue slice in the body is obtained and
displayed on a monitor as an ultrasonic image. Then, in order to change the scanning direction of
the ultrasonic transducer 6, the operation knob 20b is rotated by a finger or the like. As a result,
one of the ultrasonic operating wires 31, 31 wound around the pulley 20 is drawn out from the
pulley 20, and the other is taken in by the pulley 20. Thus, these ultrasonic operating wires 31,
31 are pushed and pulled. The force is transmitted to the rotating body 14 provided in the tip
end main body 2, and the rotating body 14 rotates by a predetermined angle, and the direction of
the ultrasonic transducer 6 changes.
[0024]
Although molybdenum disulfide powder is filled in the insertion portion 1 as an antifriction
material, this powder, and further, wear powder and other foreign matter such as the flexible
sleeve 33, etc. enter into the tip portion main body 2, ultrasonic wave When the transducer 6
rotates, it enters between the acoustic lens 13 and the acoustic window 15 through the seal
member 16 to contaminate the acoustic transmission medium injected at this site. The inside of
the casing 10 in the distal end portion main body 2 is a space closed by the proximal end side
partition wall 10b, and the cable bundle 30 and the connection of two provided through the
proximal end side partition wall 10b Since the pipe 32 is sealed by the sealing member 34, there
is no possibility that the powder may enter the casing 10 through the relevant portion. Further,
the ultrasonic operation wire 31 is inserted into the connection pipe 32. Since the sliding seal
member 36 is fixedly provided to the ultrasonic operation wire 31, the inside of the connection
pipe 32 is provided. There is no risk that foreign matter such as powder penetrates into the
casing 10 through it. Therefore, the inside of the casing 10 of the tip end main body 2 is always
kept clean, and there is no fear that the acoustic transmission medium injected between the
acoustic lens 13 and the acoustic window 15 will be contaminated, etc. Demonstrate the
characteristics.
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[0025]
When the scanning direction of the ultrasonic transducer 6 is changed, the ultrasonic operating
wire 31 is pushed and pulled, but at this time, the seal member 34 slides inside the connecting
pipe 32 formed of a rigid pipe. However, since the sliding surface consisting of the outer surface
of the seal member 34 and the inner surface of the connecting pipe 32 is formed to be slippery,
the push operation of the ultrasonic operation wire 31 is smoothly performed, and the resistance
to the operation is almost It does not increase. In addition, since the seal member 34 is located
within the straight portion 32 a of the connecting pipe 32 in the entire stroke of the movement
of the ultrasonic operation wire 31, there is no possibility that the seal member 34 is locked or
the like. Further, in order to enable smooth sliding of the seal member 34, the seal member 34
must be firmly fixed to the ultrasonic operation wire 31. Therefore, as is apparent from FIG. 6,
the seal member 34 is formed by brazing the portions on both end surfaces of the seal member
34 and by preventing the ridge 37 from protruding from the outer periphery of the seal member
34. Is fixed in a state of being held by the wedges 37 at both ends. Moreover, since the ultrasonic
operating wire 31 is usually formed by twisting a thin metal wire, the weir 37 penetrates into the
inside of the ultrasonic operating wire 31, so the weir 37 is super It does not come off from the
sonic operating wire 31 and there is no gap between them.
[0026]
As described above, according to the present invention, the seal member slidingly fitted on the
inner surface of the connection pipe is fixedly provided on a portion of the ultrasonic operation
wire located inside the connection pipe. Because foreign matter such as molybdenum disulfide
powder as a lubricant is sealed in the insertion portion, it penetrates into the tip end main body
through the inside of the connection pipe, and a predetermined portion of the tip end main body
is The acoustic transmission medium being injected is not contaminated by these foreign matters,
and so on.
[0027]
Brief description of the drawings
[0028]
1 is an explanatory view showing the entire configuration of a multi-plane type ultrasonic probe
according to the prior art.
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[0029]
2 is a cross-sectional view of the tip portion of the insertion portion in the ultrasonic probe of
FIG.
[0030]
3 is a cross-sectional view of the main body operation portion of the ultrasonic probe of FIG.
[0031]
4 is a cross-sectional view of the distal end portion of the ultrasonic probe and the distal end
portion of the insertion portion showing an embodiment of the present invention.
[0032]
5 is a cross-sectional view taken along the line X-X of FIG.
[0033]
6 is a cross-sectional view showing the insertion state of the operation wire into the connection
pipe.
[0034]
Explanation of sign
[0035]
DESCRIPTION OF SYMBOLS 1 insertion part 2 tip part main part 6 ultrasonic transducer 6a
ultrasonic transducer 10 casing 10b proximal end section wall 13 acoustic lens 14 rotating body
15 acoustic window 16 sealing member 30 cable bundle 31 ultrasonic operation wire 32
connection pipe 32a straight part 32b bent portion 34 seal member 36 sliding seal member 37
鑞
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