JPH1033536A - Ultrasonic probe for intra-celom insertion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably hold an ultrasonic probe on an endoscope side, to provide a probe body with a prescribed extra length and to extend this extra length part in such a manner that undue bending, etc., do not act thereon. SOLUTION: A connecting cord 65 is drawn out of the scanning drive unit of the ultrasonic probe 60. This connecting code 65 is attachably and detachably connected to the base end of the probe body by coupling members 66, 67 respectively successively disposed thereto. A clip member 85 is mounted at the outer cylinder to the coupling member 66 which is a female side of both coupling members 66, 67. The clip member 85 crimps the neck part of a universal code 54 extended from the main body operation part 51 of the endoscope 50. The part on the base end side of the probe body 60a is thus fixed to the endoscope 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic probe inserted into a body cavity which is inserted into a guide device such as an endoscope and guided into a body cavity to perform ultrasonic scanning in a radial direction.

[0002]

2. Description of the Related Art A typical example of an apparatus which is inserted into a body cavity and performs ultrasonic scanning from the inner wall of the body cavity is an ultrasonic endoscope or a treatment instrument insertion channel of the endoscope. There is a guided endoscopically inserted ultrasound probe to be guided. As the ultrasonic probe to be inserted endoscopically, those having the configuration shown in FIGS. 7 and 8 are widely used.

In FIG. 7, reference numeral 1 denotes an endoscope. The endoscope 1 comprises a main body operation section 2 and an insertion section 3 inserted into a body cavity. As is well known, an illumination unit 4 for illuminating the inside of the body cavity and an observation unit 5 for observing the inside of the body cavity under irradiation of illumination light from the illumination unit 4 are provided on the distal end main body 3a of the insertion unit 3. Is provided. Further, a treatment instrument insertion channel 6 for guiding a treatment instrument such as forceps is provided to perform an appropriate treatment when an affected part is found in a body cavity. The treatment instrument insertion channel 6 has an entrance 6a located near a portion connected to the insertion section 3 of the main body operation section 2 and the like, and an exit 6b has an observation field of view of the observation section 5 provided on the distal end main body 3a of the insertion section 3. It is formed at a position that goes inside.

[0004] Reference numeral 10 denotes an ultrasonic probe. The ultrasonic probe 10 has a scanning drive unit 10b attached to and detached from a proximal end of a flexible small-diameter probe main body 10a that can be inserted into the treatment instrument insertion channel 6. It is connected as much as possible. As is clear from FIG. 8, the probe main body 10a has the tube 11 whose tip is closed, and the ultrasonic vibrator 12
Is provided at a tip portion thereof, and a flexible shaft 13 constituting rotation transmission means is connected to a base 12 a of the ultrasonic transducer 12. The flexible shaft 13 is made of a close-coiled coil so as to be able to bend and to transmit the rotational force efficiently. The flexible shaft 13 extends so as to pass through the inside of the probe body 10a, and a connecting pipe 14 is fixed to a base end thereof. A mounting tube 15 is formed at the base end of the tube 11 through which the flexible shaft 13 is inserted.

The scanning drive unit 10b has a hollow rotary shaft 17 rotatably provided inside a casing 16 by a bearing 18. One end of the rotary shaft 17 faces an opening 16a of the casing 16. The rotating shaft 17 is the motor 1
The rotation angle of the rotating shaft 17 is detected by a rotary encoder 20. Rotating shaft 17
Is connected pipe 1 connected to flexible shaft 13
5 is detachably connected, and a mounting tube 15 provided on the tube 11 of the probe body 10a is fixed to a connecting tube portion 16b provided on a casing 16 of the scanning drive unit 10b.
When the motor 19 is operated in this state, the rotation shaft 17 rotates, and the rotation is transmitted to the flexible shaft 13 via the connection pipe 14. As a result, since the flexible shaft 13 rotates around the axis in the tube 11, the ultrasonic vibrator 12 provided at the tip of the flexible shaft 13 is rotationally driven.

[0006] A signal cable 21 is connected to the ultrasonic vibrator 12, and the signal cable 21 passes through the flexible shaft 13 and is detachably connected to an electrode provided on the rotary shaft 17 at a connection pipe 14. Have been. The signal cable 21 is connected to an ultrasonic observation device (not shown). Since the signal cable 21 rotates together with the ultrasonic transducer 12, the signal cable 21 is provided on the rotating signal cable 21 and the rotating shaft 17. The electrode 22 and the cord 22 connected to the ultrasonic observation apparatus and fixedly held are connected to a rotary connector 23 using a fluid contact, a slip ring or the like.
Connected by

The scanning drive unit 10b of the ultrasonic probe 10 fixes the connecting portion 16c provided integrally with the casing 16 so as to be fitted into the entrance 6a of the treatment instrument insertion channel 6. Then, in a state where the connecting portion 16c is inserted into the entrance 6a, the scanning drive unit 10b is fixed by the hook 24 so that the scanning drive unit 10b does not accidentally deviate.
Further, the probe body 10a is guided into the treatment instrument insertion channel 6 through an insertion hole provided in the connecting portion 16c.

[0008] The ultrasonic probe 1 configured as described above.
Reference numeral 0 denotes a state in which the insertion section 3 of the endoscope 1 is inserted to a predetermined position in the body cavity, and is inserted into the treatment instrument insertion channel 6 so that the distal end portion of the probe main body 10a is connected to the outlet of the treatment instrument insertion channel 6. By projecting a predetermined length from the portion 6b and operating the motor 19, the rotational force is transmitted to the ultrasonic vibrator 12 via the rotating shaft 17, the connecting pipe 14, and the flexible shaft 13 sequentially, and The sonic transducer 12 is driven to rotate. Since the rotation angle of the ultrasonic transducer 12 is detected by the encoder 20, the ultrasonic transducer 1
Each time the 2 rotates a predetermined angle, an ultrasonic pulse is transmitted from the ultrasonic transducer 12 toward the body, and a reflected echo signal from a tomographic portion of the body tissue is received. Then, the reflected echo signal is transmitted to the ultrasonic observation apparatus, and the ultrasonic observation apparatus performs predetermined signal processing. Therefore, if this operation is repeated until the ultrasonic transducer 12 makes one rotation,
One ultrasonic radial tomographic image can be obtained. This tomographic image is displayed as an image on a monitor screen.

Here, the scanning drive unit 10b of the ultrasonic probe 10 has a built-in motor 19 and encoder 20, so that it is quite heavy. The scanning drive unit 10b is connected to the entrance 6a of the treatment instrument insertion channel 6.
Therefore, the entire weight of the ultrasonic probe 10 is applied to the main body operation unit 2 of the endoscope 1. Since the surgeon or the like operates the main body operation unit 2 of the endoscope 1 with one hand, the weight of the main body operation unit 2 increases the burden on the operator's hand. Above all,
Inspection or the like using the endoscope 1 and the ultrasonic probe 10 may require a considerably long time, and the burden on the operator's hand becomes extremely large.

The entrance 6a of the treatment instrument insertion channel 6
From the scanning drive unit 10b fixed to the probe body 1
0a is extended, and the entrance 6a of the treatment instrument insertion channel 6 is extended.
, The probe body 10a must be forcibly bent. Since the flexible shaft 13 is inserted into the probe main body 10a, there is a possibility that the rotation transmission efficiency of the flexible shaft 13 is reduced or rotation unevenness is caused by such excessive bending.

On the other hand, the connecting portion 16c is connected to the scanning drive unit 1
If it is provided at the position of the extension of the rotary shaft 17 at 0b, the probe main body 10a can be guided into the treatment instrument insertion channel 6 without bending. To do this,
The probe main body 1 is set in accordance with the positional relationship between the distal end main body 3a in the body cavity of the insertion section 3 of the endoscope 1 and the site to be inspected.
It is necessary to adjust the protruding length of the treatment tool insertion channel 6 from the outlet 6b. The adjustment of the protruding length is performed by providing an extra length of the probe main body 10a at a portion from the entrance 6a to the scanning drive unit 10b, and pushing and pulling the extra length portion. However, if the probe main body 10a is directly guided from the scanning drive unit 10b into the treatment tool insertion channel 6, it is impossible to have an extra length for pushing and pulling the probe main body 10a.

In view of the above points, there is also known a configuration in which the scanning drive unit is not fixed to the entrance 6a of the treatment instrument insertion channel 6, as shown in FIGS. That is, this type of ultrasonic probe 30 includes a probe main body 30a and a scanning drive unit 30b, and the probe main body 30a extends from the entrance 6a of the treatment instrument insertion channel 6 of the endoscope 1 to the ultrasonic observation device 31. It is something that exists. The scanning drive unit 30
b is rotatably supported by a support portion 32 provided on a side surface of the ultrasonic observation apparatus 31, and the probe main body 30a is detachably connected to the scanning drive unit 30b.

As shown in FIG. 10, the scanning drive unit 30b includes a rotating shaft 34 and a motor 35 for rotating the rotating shaft 34 in the casing 33.
And an encoder 36 for detecting the rotation angle of the rotation shaft 34, and a rotary connector 37 is also built in. The configuration is substantially the same as that of the above-described scanning drive unit 10b. Although not shown, the probe main body 30a is provided with an ultrasonic vibrator at its distal end, and the base end of a flexible shaft that rotationally drives the ultrasonic vibrator is connected to the rotating shaft. However, the probe main body 30a is not fixed to the entrance 6b of the treatment instrument insertion channel 6 in the endoscope 1, but is directly connected and fixed to the casing 33 of the scanning drive unit 30b.

Since the scanning drive unit 30b is supported on the ultrasonic observation device 31 side, the weight of the scan drive unit 30b is not applied to the main body operation unit 2 of the endoscope 1, so that the ultrasonic drive unit 30b is used when performing an ultrasonic inspection. The weight of the main body operation unit 2 is reduced, and the burden on the operator is reduced. In addition, the probe main body 30a can have an extra length for adjusting the protruding length of the insertion portion 3 from the distal end main body 3a, and the probe main body 30a is forcibly bent from the entrance 6a of the treatment instrument insertion channel 6. It can be routed to the scanning drive unit 30b without any need.

[0015]

When the scanning drive unit is provided on the ultrasonic observation apparatus side, although the above-mentioned advantages are obtained, the portion of the probe main body inserted into the treatment instrument insertion channel cannot be stably held. There is a disadvantage.
Therefore, for example, when the surgeon moves the main body operation unit of the endoscope in a desired direction in a state where the probe main body of the ultrasonic probe is inserted into the treatment instrument insertion channel, the probe main body is inserted into the treatment instrument insertion channel. A force acts in the direction of pulling in or in the direction of pushing out from the treatment instrument insertion channel. The treatment instrument insertion channel has a considerable length, and the diameter difference between the outer diameter of the probe body and the inner diameter of the treatment instrument insertion channel is small. When the operator moves the endoscope largely due to movement or the like, the probe main body moves within the treatment instrument insertion channel. In particular, in order to orient the distal end main body of the insertion section in a desired direction, an angle section that is operated to bend is connected to the distal end main body, and when the main body operating section moves while the angle section is being bent, the probe main body is moved. When the probe body is pulled out from the treatment instrument insertion channel to such an extent that the tip portion of the probe body passes through the angle portion, when the probe body is retracted and passes through the curved angle portion, it is attached to the tip portion of the probe body. Since an excessive force is applied to the provided ultrasonic vibrator, it cannot be said that there is no risk of damaging the ultrasonic vibrator or the like.

The present invention has been made in view of the above points, and an object of the present invention is to stably hold an ultrasonic probe on an endoscope side and to provide a probe body with a predetermined extra length. Then, the extra length can be extended so that excessive bending or the like does not act.

[0017]

In order to achieve the above-mentioned object, the present invention provides an ultrasonic vibrator provided at the tip of a flexible probe main body, and a main body operating section connected to the insertion section. Is inserted into an insertion passage provided in the guide device, and scans the ultrasonic vibrator in the rotational direction by the rotation transmitting means inserted into the probe main body, and a portion on the base end side of the probe main body, In order to have a predetermined extra length from the entrance of the insertion passage and to fix it, a detachable probe main body fixing means is provided at a position near the entrance of the insertion passage. is there.

When the operator moves the main body operation unit while holding the main body operation unit of the guide device, the portion of the probe main body that is inserted into the insertion passage is not pulled in or pushed out. Thus, the probe is fixed by the probe body fixing means. The fixing position by the probe main body fixing means is not at the entrance of the insertion passage but near the insertion passage. The cord can be fixed to any part of the main body operation section or the insertion section. When the cord extends from the main body operation section, it can be fixed to the base of the cord. Furthermore, since the main body operation unit is gripped by the operator and moved in an appropriate direction, the main body operation unit may be fixed to the operator's hand holding the main body operation unit.

A scanning drive unit having built-in rotary drive means is connected to the probe body. Although it is possible to provide a probe main body fixing means in this scanning drive unit and fix it to the main body operation unit or the like, from the viewpoint of reducing the burden when an operator grips the main body operation unit, the scanning drive unit is attached to the main body. It is better not to fix directly to the operation unit. A connecting cord having a configuration substantially similar to that of the probe main body may be provided extending from the scanning drive unit, and the connecting cord may be detachably connected to the probe main body by a coupling member. According to this structure, the probe main body fixing means can be connected to the coupling member, which is preferable from the viewpoint of reducing the weight of the main body operation unit.

The probe main body fixing means connected to the coupling member needs to be easily attached to and detached from the fixed portion. For this purpose, a clip-type fixing means, a band-type fixing means, or the like can be used. In the case of the clip, a small-diameter member, for example, a small-diameter portion in the vicinity of the main body operation portion, that is, a root portion of a cord extending from the main body operation portion, or a connection portion between the main body operation portion and the insertion portion is provided. It can be fixed by sandwiching it. From the probe main body fixing member to the entrance of the insertion passage, there is provided an extra length for adjusting the protruding length of the tip of the probe main body from the insertion portion, and further, the probe main body is fixed so as not to cause excessive bending as much as possible. The use of a clip can be fixed in an extremely stable state. On the other hand, for the band-type fixing means, for example, a hook-and-loop fastener tape can be used. When the hook-and-loop fastener is used, the member to be fixed may have any shape as long as it can be surrounded by the hook-and-loop fastener. Therefore, it can be fixed also to a large diameter portion in the main body operation section. In addition, it is also possible to fix not to the guide device itself but to a wrist or the like of a hand of the operator who holds the main body operation unit.

[0021]

Embodiments of the present invention will be described below. FIGS. 1 to 4 show an embodiment of an ultrasonic probe, FIG. 5 shows a modification of the probe main body fixing means in this embodiment, and FIG. 6 shows another example of the probe main body fixing means. Shown respectively. Although an endoscope is shown as a guide device for the probe body of the ultrasonic probe, the guide device is not limited to this.

In FIG. 1, reference numeral 50 denotes an endoscope. The endoscope 50 includes an insertion portion 5 inserted into a body cavity of a main body operation portion 51.
2 is extended, and has substantially the same structure as the endoscope 1 described in the related art. Therefore, although not shown, a treatment instrument insertion channel 53 extending from the main body operation section 51 to the entire length of the insertion section 52 is provided, and a lighting section and an observation section are provided at the distal end main body of the insertion section 52, An outlet of the treatment instrument insertion channel 53 is formed. The proximal end of the treatment instrument insertion channel 53 is provided with an inlet 53a provided in the vicinity of a portion of the main body operation unit 51 that is connected to the insertion unit 52. Further, a light guide is used to transmit the illumination light to the illumination unit, and the light guide is transmitted from the insertion unit 52 through the main body operation unit 51,
Universal cord 54 extended from main body operation unit 51
Extending within. And the universal code 54
Is detachably connected to a light source device (not shown).

The ultrasonic probe 60 has a probe body 60a.
And a scanning drive unit 60b. As shown in FIG. 2, the probe main body 60a has a tube 61 made of a flexible tube material whose end is closed, and an ultrasonic vibrator 62 is provided at the end of the tube 61. The base 62a provided with the ultrasonic vibrator 62 includes:
A flexible shaft 63 composed of a close contact coil and the like constituting a rotation transmitting means is connected. On the other hand, the scanning drive unit 60b is attached to an ultrasonic observation device or the like, for example, as shown in FIG. And
A connecting cord 65 is drawn out of a casing 64 of the scanning drive unit 60b.
It is detachably connected to the base end of the probe main body 60a.
For this purpose, coupling members 66 and 67 are provided at the ends of the connection cord 65 and the probe main body 60a, respectively.

The casing 64 of the scanning drive unit 60b
A rotation shaft 69 is provided therein. The rotating shaft 69 is driven to rotate by a motor 70.
The rotation angle of 9 is detected by the rotary encoder 71. Further, a rotary connector 72 is provided at a position on the extension of the rotating shaft 69. The connection cord 65 is obtained by inserting a second flexible shaft 73 having the same structure as the flexible shaft 63 into a flexible sleeve 74, and the second flexible shaft 73 has a rotating shaft 69.
And is provided integrally with the sleeve 74.
Is fixed to the casing 64.

Next, the connecting cord 65 and the probe body 60
The configuration of the connecting portion a will be described with reference to FIG. The coupling member 66 is provided on the connection cord 65 side, and the coupling member 67 is provided on the probe main body 60a side. The coupling member 66 is a female member, and has a bearing 76 in an outer cylinder 75 fixedly provided at the tip of a sleeve 74.
The rotary cylinder 77 is provided via the. And the second
The flexible shaft 73 is fixedly provided to the rotary cylinder 77. On the other hand, the coupling member 67 is a male member, and the coupling member 67 has an inner cylinder 7.
8, a rotatable member 79 is rotatably supported via a bearing 80. The inner cylinder 78 is connected to the tube 61 of the probe body 60a, and the rotating member 79 is connected to the flexible shaft 63 provided in the tube 61. The male and female coupling members 66 and 67 may be reversed.

Therefore, the outer cylinder 7 of the coupling member 66
The code 65 and the probe main body 60b can be attached and detached by fitting the inner tube 78 of the coupling member 67 into the fitting member 5 so as to have a predetermined fitting length, and inserting the rotating member 79 into the rotating cylinder 77. , The flexible shaft 63 rotates integrally with the second flexible shaft 73. For this purpose, although not shown, the fitting portion between the rotary cylinder 77 and the rotary member 79 is connected to each other using a spline, a key, or the like so as to be relatively non-rotatable. Here, the two coupling members 66 and 67 are for relaying signals as well as transmitting rotation. For this purpose, an insulating sleeve 81 is mounted inside the rotating member 79,
The electrode pins 82 are inserted through the insulating sleeve 81. Further, an insulating ring 83 is fixedly provided inside the rotary cylinder 77, and inside the insulating ring 83,
A contact member 84 into which the electrode pin 82 is inserted is provided. In addition, the rotating member 79 and the rotating cylinder 77 themselves also function as the other electrode, so that the outer cylinder 75 and the inner cylinder 78 fitted into the outer cylinder 75 are both formed of members having electrical insulation.

A clip member 85 as a probe main body fixing means is attached to the outer cylinder 75 of the coupling member 66 on the female side. This clip member 85
As shown in FIG. 4, the clip part 86, 87 has a pair of clip parts 86, 87, and the clip parts 86, 87 have arc-shaped operating parts 86a, 87a.
In the base portions of the operating portions 86a, 87a of the members 6, 87, the connecting pins 88 are inserted, and the tip portions are normally urged by a torsion coil spring 89 to a closed state in which the tip portions are joined to each other. The clip portions 86 and 87 are provided with extending portions 86b and 87b. The extending portion 86b is fixed to the coupling member 66 by surrounding the outer tube 75. Further, the extending portion 87b serves as an opening / closing operation portion, and the extending portion 87b is bent in a direction opposite to the other extending portion 86b. Therefore, the extending portion 87 can be formed with a finger or the like.
is pushed toward the extending portion 86b, the operating portions 86a, 87
a is opened, the other member is inserted, and the extension 87
When the pushing force to the b is released, the counterpart member is actuated by the operating portion 8.
6a and 87a.

With the above-described configuration, the surgeon grasps the main body operation section 51 of the endoscope 50 and inserts the insertion section 52
Is inserted from, for example, the oral cavity or the like to a site in the body cavity where an inspection is to be performed, and a required inspection is performed. As a result of the inspection, if it is necessary to collect cells or perform another treatment, forceps or other treatment tools are inserted from the treatment tool insertion channel 53 to perform an appropriate treatment. When a change in the color tone of the inner wall of the body cavity or the like is found, information on the state of the body tissue at the site is obtained, and confirmation is made as to whether there is a tumor or the like. That is, an ultrasonic inspection is performed using the ultrasonic probe 60. The probe main body 60a of the ultrasonic probe 60 is inserted into the treatment instrument insertion channel 53, and if necessary, a liquid such as deaerated water as an ultrasonic transmission medium is supplied into the body cavity in advance. The supply of the liquid can also be performed via the treatment instrument insertion channel 53.

After preparing for the ultrasonic examination, the probe main body 60a of the ultrasonic probe 60 is inserted from the entrance 53a of the treatment instrument insertion channel 53. Here, at the stage before the start of insertion, the coupling member 67 provided on the probe main body 60a is connected to the coupling member 66 provided on the distal end of the connection cord 65 extended from the scanning drive unit 60b. Then, the probe main body 60a is protruded by a predetermined length from the outlet of the treatment instrument insertion channel 53, and the distal end portion is positioned at an optimal position for performing an ultrasonic inspection. At this time, the probe main body 60a may be pushed and pulled without moving the insertion portion 52. The operation of the probe main body 60a is performed under observation of the endoscope 50, whereby the position of the ultrasonic transducer 62 is accurately controlled.

The probe body 60a is connected to the coupling member 67 in a state where the tip of the probe body 60a is arranged at a predetermined position or before the probe body 60a is inserted into the treatment instrument insertion channel 53. Clip member 8
5, the opening / closing operation section composed of the extending section 87 of the clip piece 87 of FIG. 5 is grasped by hand, the space between the operation sections 86a and 87a is widened, and the universal cord 54 extended from the main body operation section 51 of the endoscope 50. At the base of the two operating parts 86
a, 87a. As a result, the base end portion of the probe main body 60a is fixed to the endoscope 50. Here, the entire length of the probe main body 60a is longer than at least the entire length of the treatment instrument insertion channel 53. Accordingly, the treatment instrument insertion channel 5 is provided in the probe body 60a.
3 has a predetermined extra length from the inlet 53a to the portion fixed to the base of the universal cord 54 by the clip member 85.

The motor 7 provided in the scanning drive unit 60b
When 0 is operated, the rotating shaft 69 is driven to rotate. Since the second flexible shaft 73 is connected to the rotating shaft 69, the second flexible shaft 73
Rotates following this. The rotary cylinder 77 connected to the tip of the second flexible shaft 73 faces the coupling member 66 provided on the scanning drive unit 60b, and the coupling member 66 is a coupling member 67 provided on the probe main body 60a. And the rotating cylinder 77
Is rotationally connected to the rotating member 79 to which the flexible shaft 63 is connected, so that the rotation of the second flexible shaft 66 is transmitted to the flexible shaft 63 via the rotating cylinder 77 and the rotating member 79. . Since the base 62a provided with the ultrasonic vibrator 62 is connected to the tip of the flexible shaft 63, the ultrasonic vibrator 62 is driven to rotate.

Since the rotation angle of the ultrasonic transducer 62 is detected by the rotary encoder 71,
When a trigger pulse is transmitted every time the ultrasonic transducer 62 rotates a predetermined angle based on the detection signal from the ultrasonic transducer 62, the ultrasonic pulse is transmitted from the ultrasonic transducer 62 toward the body, and the reflected echo is received. Then, by performing predetermined signal processing by the ultrasonic observation device, radial ultrasonic scanning is performed. As a result of the radial ultrasonic scanning, information on the state of the tissue in the body is displayed as a radial ultrasonic image on a monitor screen.

In the above operation, the operator always operates the endoscope 5
Although the main body operation unit 51 of the first embodiment needs to be gripped with one hand, the ultrasonic wave inspection is performed while the load of the probe main body 60a and the coupling members 66 and 67 substantially acts on the main body operation unit 51. The load of the heaviest scanning drive unit 60b of the probe is
Does not work at all. Therefore, the weight increase of the main body operation unit 51 during the ultrasonic examination is substantially negligible, and the burden on the operator is reduced.

The probe body 60a has an extra length from the entrance 53a of the treatment instrument insertion channel 53 to a portion fixed by the clip member 85, but this extra length becomes a gentle curved state and is sharply bent. Since the flexible shaft 63 inserted in the tube 61 of the probe main body 60a rotates smoothly, the resistance at the time of rotation of the flexible shaft 63 decreases, and the flexible shaft 63 rotates efficiently. There will be no uneven rotation.

At the time of the ultrasonic examination, for example, the operator may move or change his / her posture, and the positional relationship between the ultrasonic observation device and the endoscope 50 held by the operator may change each time. become. The scanning drive unit 60b is fixed to the ultrasonic observation device.
b, the distal end of the connection cord 65 is fixed to the endoscope 50 by the clip member 85, and the probe main body 60a is located on the forward side fixed by the clip member 85. Even if the positional relationship changes, only the connection cord 65 moves, and the probe main body 60a located in the treatment instrument insertion channel 53 does not move, and is kept in a stable state.

In order to obtain information on a tomographic state in the body by ultrasonic scanning after the ultrasonic scanning has been performed after the distal end of the probe main body 60a is arranged at a predetermined position, the probe main body 60a needs It is necessary to change the position of the portion where the ultrasonic transducer 62 is provided at the tip. When the insertion section 52 is pushed or pulled to change the position of the ultrasonic inspection, it is difficult to move the tip of the insertion section 52 to the target position due to swallowing reflex of the patient or the like. Since there is a predetermined extra length from the entrance 53 of the treatment instrument insertion channel 53 to the part fixed by the clip member 85, if the extra length is pushed and pulled, the position of the ultrasonic transducer 62 can be adjusted. Thus, the ultrasonic transducer 62 can be accurately arranged at the position to be inspected without being affected by the swallowing reflex of the patient.

Further, if an ultrasonic transmission medium such as degassed water supplied into a body cavity flows out of a site to be inspected during the ultrasonic inspection, it must be replenished. It is necessary to pull out the probe main body 60a and open the treatment instrument insertion channel 53 at first.
Since the probe main body 60a is not fixed to the entrance 53a of the treatment instrument insertion channel 53, the probe main body 60a can be easily and quickly extracted from the treatment instrument insertion channel 53. In addition, since the base end of the probe main body 60a is fixed in the vicinity of the main body operation unit 51 of the endoscope 50, the extracted probe main body 60a does not completely separate from the endoscope 50, so that the ultrasonic transmission medium After replenishment and the like, the probe main body 60a is again connected to the treatment instrument insertion channel 5.
3 can be smoothly and quickly performed.

Here, the clip member 85 is used to fix the base end of the probe main body 60a to the endoscope 50, and the clip member 85 is fixed to the universal cord 54 in FIG. However, in addition to the universal cord 54, it can be fixed to, for example, a portion on the base end side of the insertion portion 52. When the clip member 85 is fixed to the insertion portion 52, clip portions 86 and 8 constituting the clip member 85 are provided to prevent the outer surface thereof from being damaged.
It is preferable that a cushioning member such as a rubber sheet is adhered to the inner surfaces of the operating portions 86a and 87a. As shown in FIG. 5, a flange 90 is provided on the extending portion 86b of the clip piece 86, and a plug member 91 inserted into the entrance 53a of the treatment instrument insertion channel 53 is attached to the flange 90. If a through-hole 91a through which the probe main body 60a can be inserted is formed in the member 91, the probe main body 60a can be fixed to the inlet 53a as required.

Further, as the probe body fixing means,
The configuration shown in FIG. 6 can also be adopted. That is, one end of the hook-and-loop fastener tape 92 is fixed to the outer cylinder 75 of the coupling member 66, and this hook-and-loop fastener tape 92 has a predetermined length from a fixing portion to the outer cylinder 75, and the other end is a free end. I do. With such a configuration, the hook-and-loop fastener tape 92 can be fixed by being wound around the main body operation part 51 as well as the universal cord 54 and the insertion part 52. It can also be fixed by winding it around the hand. Accordingly, by fixing the probe main body 60a at an appropriate position, the probe main body 60a can have a predetermined extra length, and the extra length portion can form a smooth curve so that the base end portion can be fixed.

[0040]

As described above, according to the present invention, the probe body fixing means is provided with the base end portion of the probe body having a predetermined extra length from the entrance of the insertion passage of the guide device. Because it was detachably fixed at the position near the entrance of the insertion passage, the ultrasound probe is stably held on the endoscope side, and the probe body has a predetermined extra length, The extra length can be extended so that excessive bending or the like does not act.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is an external view of a main part in a state where an ultrasonic probe for insertion into a body cavity is mounted on an endoscope as a guide device.

FIG. 2 is an overall configuration diagram showing the entire configuration of the ultrasonic probe with a part thereof cut away.

FIG. 3 is a cross-sectional view of a coupling member that connects a connection cord and a probe main body.

FIG. 4 is a sectional view of a clip member.

FIG. 5 is an external view showing a modified example of a clip member.

FIG. 6 is an external view showing another embodiment of the probe main body fixing means.

FIG. 7 is an explanatory diagram of a configuration of a conventional ultrasonic probe for insertion into a body cavity.

FIG. 8 is a front view showing a part of the ultrasonic probe of FIG.

FIG. 9 is an external view showing a state in which an ultrasonic probe for insertion into a body cavity according to another conventional technique is mounted on an endoscope as a guide device.

FIG. 10 is a front view showing a cross section of a main part of the scanning drive unit of the ultrasonic probe of FIG. 9;

[Explanation of symbols]

 Reference Signs List 50 endoscope 51 main body operation section 52 insertion section 53 treatment tool insertion channel 53a entrance 54 universal cord 60 ultrasonic probe 60a probe main body 60b scanning drive unit 62 ultrasonic transducer 63 flexible shaft 65 connection cord 66, 67 coupling member 85 Clip member 86, 87 Clip piece 88 Connecting pin 89 Torsion coil spring 92 Surface fastener tape

Claims (4)

[Claims] An ultrasonic vibrator is provided at the tip of a probe main body which is inserted into an insertion passage provided in a guide device having a flexible body and a main body operation section connected to an insertion section. The ultrasonic transducer is caused to scan in the rotational direction by the rotation transmitting means inserted through the probe main body, wherein a portion on the proximal end side of the probe main body has a predetermined extra length from the entrance of the insertion passage. An ultrasonic probe for insertion into a body cavity, wherein a detachable probe main body fixing means is provided at a position near an entrance of the insertion passage for fixing. 2. A coupling member is connected to a base end portion of the probe main body, and the coupling member transmits a rotation from a scanning drive unit provided with a rotation drive unit to a coupling member provided at a distal end of a connection cord. 2. An ultrasonic probe inserted into a body cavity according to claim 1, wherein the probe main body fixing means is connected to one of the coupling members. 3. An ultrasonic probe inserted into a body cavity according to claim 2, wherein said probe main body fixing means is constituted by a clip means connected to said coupling member. 4. An ultrasonic probe inserted into a body cavity according to claim 2, wherein said probe main body fixing means is constituted by a band-shaped member having a locking portion.