JPH10146343A - Puncture adapter and ultrasonic probe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a puncture adapter whose operation is simple and by which always optimal fixing force is obtained by arranging a key-shaped part in a tip part of a needle guide to hold a puncture needle along an ultrasonic probe, arranging a longitudinally movable lug part in a rear end part of the needle guide, and energizing this lug part by a spring. SOLUTION: A puncture adapter 1a to introduce a puncture needle into a body cavity has an almost cylindrical needle guide 3a inside which the puncture needle is inserted. A key-shaped part 5a being a backward inclined projection is arranged in a tip part of the needle guide 3a, and two pins 23a projecting forward from its front end part are arranged in a longitudinally movable lug part 21a arranged in a rear end part. When this puncture adapter 1a is installed in an ultrasonic probe in a body cavity, the key-shaped part 5a is hooked on a key hole of the ultrasonic probe in a body cavity, and after the pins 23a are inserted into a pin hole by compression of a herical spring 29a, when force to pull the lug part 21a is weakened, the lug part 21a is pressed against a step difference part by elongating force of the helical spring 39a, and installation is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intracavity ultrasonic probe and a puncture adapter attached to the probe and for introducing a puncture needle into the body cavity.

[0002]

2. Description of the Related Art An intracavity ultrasonic probe is used to perform ultrasonic diagnosis from within a body cavity of a subject. The ultrasonic probe in the body cavity has an ultrasonic vibrator inside a rod-shaped shaft portion having a rounded tip, and the ultrasonic vibrator is electrically or mechanically scanned to obtain a tomographic image of the subject. Is what you get. After performing image diagnosis with this intracavity ultrasonic probe, a tissue sample of the region of interest is collected,
A puncture may be performed to aspirate a liquid remaining in the tissue or inject a drug solution.

[0003] An adapter for attaching a puncture needle used in this puncture operation to an ultrasonic probe in a body cavity is called a puncture adapter.

Next, an example of the structure of a conventional puncture adapter will be described with reference to FIG. As shown in FIG. 9, the intracavity ultrasonic probe 101 has a shaft portion 10 as an insertion portion thereof.
3, a keyhole 105 is provided which is inclined forward from the side of the tip end,
Dimples 109, which are circular depressions, are provided on opposite side surfaces of the grip portion 107 following the rear end of the shaft portion 103.

On the other hand, the puncture adapter 121 has:
A substantially cylindrical needle guide 123 into which a puncture needle is inserted has a key-shaped projection fitted into the keyhole 105 of the shaft portion at the distal end thereof, and a saddle straddling the grip portion is provided at the rear end of the needle guide 123. 127 were provided. One end of this saddle 127 is provided with a fixed circular projection 129 fitted to one dimple 109, and the other end is provided with a circular projection movable forward and backward with respect to the other dimple by a fixing screw 131. 133
Was provided.

When attaching the puncture adapter to the ultrasonic probe in the body cavity, first, the key at the tip is hooked into the key hole 105 of the probe shaft, and the circular projection 129 fixed to the saddle 127 is gripped by the grip 107. The fixing screw 1 provided on the saddle 127 in accordance with one of the dimples 109
When the screw 31 is screwed in, the opposing protrusion is fitted into the dimple of the probe grip and fixed.

[0007]

However, in the above conventional puncture adapter, the fixing force of the puncture adapter varies due to the inconvenience of screwing the fixing screw when mounting the probe on the probe and the variation of the screwing force of the operator. If the fixing force is too small, the puncture adapter may be loosened during use, and if the fixing force is too strong, it may be difficult to remove the adapter after use, or the probe may be severely damaged.

In view of the above problems, it is an object of the present invention to provide a puncture adapter which is easy to operate and always obtains an optimum fixing force irrespective of the tightening condition of an operator, and an intracorporeal ultrasonic probe which is compatible with the puncture adapter. It is to provide.

[0009]

In order to achieve the above object, the present invention has the following arrangement. That is, the invention according to claim 1 is attached to the side face of the shaft portion of an ultrasonic probe including a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion continuous to a rear end portion of the shaft portion. A puncture adapter for holding a puncture needle along the ultrasonic probe, wherein the puncture needle has a substantially cylindrical needle guide through which a puncture needle is inserted, and a key-shaped portion provided at the distal end of the needle guide. A handle portion having two protrusions and provided at the rear end of the needle guide so as to be movable back and forth, and a spring for biasing the knob portion forward or backward with respect to the needle guide. Make a summary.

According to a second aspect of the present invention, in the puncture adapter according to the first aspect, the spring is provided on the outer peripheral portion of the needle guide as a helical spring, and the rear end of the needle guide is provided with the spring. A large diameter part that locks the rear end is formed,
The knob is provided with at least one pin protruding forward, and has a small-diameter hole having an opening at a front end of the knob, and a large-diameter hole having an opening at a rear end following the hole. The large diameter hole of the needle guide is inserted into the large diameter hole, and the front end of the spring urges the knob forward by its extension force, The gist is to be fixed to the ultrasonic probe.

According to a third aspect of the present invention, in the puncture adapter according to the first aspect, the spring is provided on an outer peripheral portion of the needle guide as a helical spring, and a front end portion of the spring is provided near a rear portion of the needle guide. The large diameter part which locks is formed,
The knob is provided with at least one pin projecting rearward, and has a small-diameter hole having an opening at a rear end of the knob and a large-diameter hole having an opening at a front end following the hole. The spring and the large-diameter portion of the needle guide are inserted into the large-diameter hole, and the rear end of the spring biases the knob portion rearward by the extension force thereof. The gist is to be fixed to the ultrasonic probe.

According to a fourth aspect of the present invention, there is provided an ultrasonic probe having a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion connected to a rear end portion of the shaft portion. 4. A keyhole is provided on a side surface of a front end portion of the puncture adapter, and at least one pin hole is provided on a rear end portion of the shaft portion, wherein the key-shaped portion of the puncture adapter according to claim 1 is fitted in the keyhole. 5. The projection of the puncture adapter according to claim 1 or claim 2 or claim 3
An ultrasonic probe having a feature that a pin of the puncture adapter described above fits into the pin hole.

According to a fifth aspect of the present invention, there is provided an ultrasonic probe having a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion connected to a rear end portion of the shaft portion. A puncture adapter that is attached to the puncture needle and holds the puncture needle along the ultrasonic probe; a substantially cylindrical needle guide into which the puncture needle is inserted; and a key-shaped portion provided at the distal end of the needle guide. A taper-shaped saddle-shaped portion movably provided in the rear end of the needle guide forward and backward, and a spring for urging the saddle-shaped portion forward or rearward with respect to the needle guide. Make a summary.

According to a sixth aspect of the present invention, in the puncture adapter according to the fifth aspect, the spring is provided on the outer peripheral portion of the needle guide as a helical spring, and the rear end of the needle guide is provided with the spring. A large diameter part that locks the rear end is formed,
The knob is provided with a small-diameter hole having an opening at the front end thereof, and a large-diameter hole having an opening at the rear end following the hole. The large-diameter hole includes the spring and the needle guide. The large-diameter portion of the spring is inserted, and the front end portion of the spring is fixed to the ultrasonic probe by urging the knob portion forward by its extension force.

According to a seventh aspect of the present invention, in the puncture adapter according to the fifth aspect, the spring is provided on an outer peripheral portion of the needle guide as a helical spring, and a front end portion of the spring is provided near a rear portion of the needle guide. The large diameter part which locks is formed,
The knob is provided with a small-diameter hole having an opening at the rear end and a large-diameter hole having an opening at the front end following this hole, and the large-diameter hole is provided with the spring and the needle guide. The gist of the present invention is that the large-diameter portion is inserted, and the rear end of the spring urges the knob portion rearward by its extension force to be fixed to the ultrasonic probe.

According to an eighth aspect of the present invention, there is provided an ultrasonic probe including a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion connected to a rear end portion of the shaft portion. The center portion of the puncture adapter is formed into a taper shape which is thinner than both end portions and coincides with the taper shape of the saddle-shaped portion of the puncture adapter according to any one of claims 5 to 7. The gist of the puncture adapter according to any one of the claims is that a keyhole into which the key-shaped part is fitted is provided on the side surface of the front end of the shaft part.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view (a) and a sectional view (b) showing a first embodiment of a puncture adapter according to the present invention, and FIG. 2 shows a state in which the puncture adapter is attached to an ultrasonic probe in a body cavity. FIG.

Referring to FIG. 1, a puncture adapter 1a according to the first embodiment has a substantially cylindrical needle guide 3a through which a puncture needle (not shown) is inserted, and a front and rear needle guide 3a. A movable knob portion 21a and a needle guide 3a;
Spring 39a provided on the outer periphery of the E-ring 3
7a.

At the tip of the needle guide 3a, there is provided a key-shaped portion 5a which is a projection inclined backward. Needle guide 3
A large diameter portion 7a for locking the rear end of the helical spring 39a is provided at the rear end of the large diameter portion 7a.
An insertion port 11a for a puncture needle (not shown) is open in a funnel shape.

The knob 21a is provided with two pins 23a protruding forward from the front end thereof.
1a, a small-diameter hole 25a having an opening at the front end and a large-diameter hole 27a having an opening at the rear end following the small-diameter hole 25a are provided. The large-diameter hole 27a is a helical coil compressed from its natural length. The spring 39a and the large diameter portion 7a of the needle guide 3a are slidably inserted.

The needle guide 3a is provided with a groove 9a which goes around the outer periphery thereof.
is engaged, and the extension of the helical spring 39a locks the knob 21a so as not to be pushed forward from the position of the E-ring 37a.

FIG. 2 shows this puncture adapter 1a, for example.
The state attached to the ultrasonic probe 41a in a body cavity is shown. The intracavity ultrasonic probe 41a has a rod-shaped shaft portion 43 having a built-in ultrasonic vibrator (not shown) at its distal end.
a and a grip portion 45 following the rear end of the shaft portion 43a.
a and an intra-body ultrasonic probe 41a pulled out of the rear end of the grip portion 45a and connected to an ultrasonic diagnostic apparatus (not shown).
And a cord 61a for connecting the.

A keyhole 47a is provided on the side surface (upper surface) near the distal end of the shaft portion 43a of the intracavity ultrasonic probe 41a to be fitted with the key-shaped portion 5a of the puncture adapter 1a. In addition, a step 51a is provided near the boundary between the shaft 43a and the grip 45a of the intracavity ultrasonic probe 41a, and the step 51a has two pin holes 49a.

Next, a method of attaching the puncture adapter 1a to the ultrasonic probe 41a in the body cavity will be described. First, the key-shaped portion 5a of the needle guide 3a is inserted into the body cavity ultrasonic probe 41a.
When the knob 21a is pulled rightward, the helical spring 39a is compressed, and the knob 21a slides rightward (rearward).

For this reason, the distance between the key-shaped portion 5a and the pin 23a is increased, and the pin 23a is connected to the intracavity ultrasonic probe 41a.
In this state, when the pulling force of the knob 21a is gradually reduced and the hand is released, the knob 21a is pulled by the extension force of the helical spring 39a, and the step 51a is formed.
To complete the installation.

In this state, the key-shaped portion 5a and the keyhole 47a are fitted together and the two pins 23a and the pinholes 49a are fitted and supported at three points in a three-dimensional space. In addition, since the source of the fixing force is the extension force of the helical spring 39a, a constant fixing force is always obtained.

Next, a method for removing the puncture adapter 1a from the intracavity ultrasonic probe 41a will be described. When the knob 21a is pulled rightward, the helical spring 39a is compressed, and the knob 21a slides rightward (rearward).
For this reason, the distance between the key-shaped part 5a and the pin 23a increases,
The pin 23a is inserted into the pin hole 49 of the intracavity ultrasonic probe 41a.
a, and then the key-shaped part 5a can be removed from the keyhole 47a.
Can be separated from each other.

FIG. 3 shows a second embodiment of the puncture adapter according to the present invention.
FIGS. 4A and 4B are a front view and a cross-sectional view, respectively, showing an embodiment of the present invention. FIG. 4 is a side view showing a state in which the puncture adapter is attached to an intracorporeal ultrasonic probe.

According to FIG. 3, a puncture adapter 1b of the second embodiment has a substantially cylindrical needle guide 3b through which a puncture needle (not shown) is inserted, and is movable back and forth toward the rear of the needle guide 3b. Knob 21b provided on the needle guide 3
b, a helical spring 39b provided on the outer peripheral portion and an E-ring 37b.

At the tip of the needle guide 3b, a key-shaped portion 5b, which is a projection inclined forward, is provided. Needle guide 3
A large diameter portion 7b for locking the front end of the helical spring 39b is provided slightly forward from the rear end of the needle guide 3b.
At the rear end of b, a puncture needle insertion port 11b (not shown) is opened in a funnel shape.

The knob 21b is provided with two pins 23b protruding rearward from the rear end thereof, a small-diameter hole 25b having an opening at the rear end of the knob 21b, and a front end connected to the small-diameter hole 25b. Large-diameter hole 27b having an opening at the bottom
The helical spring 39b compressed from its natural length and the large diameter portion 7b of the needle guide 3b are slidably inserted into the large diameter hole 27b.

At the rear end of the needle guide 3b, there is provided a groove 9b surrounding the outer periphery thereof. An E-ring 37b is fitted into the groove 9b, and the extension force of the helical spring 39b is applied to the knob. 21b is locked so as not to be pushed backward from the position of the E-ring 37b.

FIG. 4 shows this puncture adapter 1b, for example,
The state attached to the ultrasonic probe 41b in a body cavity is shown. The intracavity ultrasonic probe 41b has a rod-shaped shaft portion 43 having a built-in ultrasonic vibrator (not shown) at its distal end.
b and a grip portion 45 following the rear end of the shaft portion 43b.
b and the intracavity ultrasonic probe 41b pulled out from the rear end of the grip portion 45b and inserted into an ultrasonic diagnostic apparatus (not shown).
And a cord 61b for connecting the.

A keyhole 47b is provided on the side surface (upper surface) near the tip of the shaft portion 43b of the intracavity ultrasonic probe 41b so as to fit with the key-shaped portion 5b of the puncture adapter 1b. Further, a notch 53b is provided near the boundary between the shaft 43b and the grip 45b of the intracavity ultrasonic probe 41b, and the notch 53b has
Two pin holes 49b are provided.

Next, a method of attaching the puncture adapter 1b to the ultrasonic probe 41b in the body cavity will be described. First, the key-shaped portion 5b of the needle guide 3b is connected to the intracorporeal ultrasonic probe 41b.
When the knob 21b is pressed and shrunk leftward, the helical spring 39b is compressed, and the knob 21b slides leftward (forward).

Therefore, the distance between the key-shaped portion 5b and the pin 23b is reduced, and the pin 23b is connected to the ultrasonic probe 41b in the body cavity.
In this state, when the force for compressing and retracting the knob portion 21b is gradually reduced and the hand is released, the knob portion 21b is pressed against the right side of the notch portion 53b by the extension force of the helical spring 39b. The installation is completed.

In this state, the key-shaped part 5b and the keyhole 47b are fitted together and the two pins 23b and the pinhole 49b are fitted together, and are supported at three points in a three-dimensional space, and are sufficiently stable. In addition, since the source of the fixing force is the extension force of the helical spring 39b, a constant fixing force is always obtained.

Next, a method for removing the puncture adapter 1b from the intracavity ultrasonic probe 41b will be described. When the knob 21b is pressed and contracted to the left, the helical spring 39b is compressed, and the knob 21b slides leftward (forward). For this reason, the distance between the key part 5b and the pin 23b is reduced, and the pin 23b can be removed from the pin hole 49b of the intracavity ultrasonic probe 41b.
7b, the two can be separated.

FIG. 5 shows a third embodiment of the puncture adapter according to the present invention.
FIGS. 6A and 6B are a front view and a cross-sectional view, respectively, showing an embodiment of the present invention. FIG. 6 is a side view showing a state in which this puncture adapter is attached to an ultrasonic probe in a body cavity.

According to FIG. 5, a puncture adapter 1c according to the third embodiment has a substantially cylindrical needle guide 3c through which a puncture needle (not shown) is inserted, and a front and rear portion at the rear end of the needle guide 3c. A movable knob portion 21c and a needle guide 3c;
Helical spring 39c provided on the outer peripheral portion of the
7c.

At the distal end of the needle guide 3c, there is provided a key-shaped portion 5c which is a projection inclined backward. Needle guide 3
A large diameter portion 7c for locking the rear end of the helical spring 39c is provided at the rear end of the large diameter portion 7c.
An insertion port 11c for a puncture needle (not shown) is open in a funnel shape.

The knob 21c is composed of a substantially cylindrical knob main body and a saddle-shaped portion 29c connected to the lower part of the knob main body.
Consists of The knob main body 21c is provided with a small-diameter hole 25c having an opening at the front end thereof and a large-diameter hole 27c having an opening at the rear end following the small-diameter hole 25c.
The helical spring 39c compressed from its natural length and the large diameter portion 7c of the needle guide 3c are slidably inserted into the large diameter hole 27c.

The saddle-shaped portion 29c has a substantially frustoconical cylindrical shape having a cut-out portion 31c, which is partially parallel to the axis and is slightly wider than the thinnest portion of the shaft portion described later. Is tapered 33c with a larger radius than the rear
It has become.

The needle guide 3c is provided with a groove 9c which goes around the outer periphery thereof.
c is fitted, and the extension of the helical spring 39c locks the knob 21c so as not to be pushed forward from the position of the E-ring 37c.

FIG. 6 shows this puncture adapter 1c, for example.
The state attached to the intracavity ultrasonic probe 41c is shown. The intracavity ultrasonic probe 41c has a rod-shaped shaft portion 43 having a built-in ultrasonic vibrator (not shown) at the distal end.
c and a grip portion 45 following the rear end of the shaft portion 43c.
c and the intracavity ultrasonic probe 41c pulled out from the rear end of the grip portion 45c and inserted into an ultrasonic diagnostic apparatus (not shown).
And a cord 61c for connecting

A keyhole 47c is provided on the side surface (upper surface) near the distal end of the shaft portion 43c of the intracavity ultrasonic probe 41c to be fitted with the key-shaped portion 5c of the puncture adapter 1c. Further, the shaft portion 43c of the intracavity ultrasonic probe 41c has a tapered shape in which the center portion is the thinnest at the center and gradually becomes thicker toward both ends, and the tapered shape is the saddle-shaped portion of the puncture adapter 1c. It is formed so as to match the tapered shape 33c of 29c.

Next, a method of attaching the puncture adapter 1c to the ultrasonic probe 41c in the body cavity will be described. First, the key-shaped portion 5c of the needle guide 3c is inserted into the body cavity ultrasonic probe 41c.
When the knob 21c is pulled rightward, the helical spring 39c is compressed, and the knob 21c slides rightward (rearward).

Therefore, the distance between the key-shaped portion 5c and the saddle-shaped portion 29c is increased, and the thinnest portion of the shaft portion 43c can be inserted into the saddle-shaped portion 29c through the cut-out portion 31c of the saddle-shaped portion 29c. In this state, when the pulling force of the knob portion 21c is gradually weakened and the hand is released, the saddle-shaped portion 29c is pressed toward the front of the shaft portion 43c by the extension force of the helical spring 39c, and the mounting is completed.

This state is sufficiently stable because the fitting of the key-shaped portion 5c and the keyhole 47c and the tapered shape 33c of the saddle-shaped portion 29c and the tapered shape of the shaft portion 43c coincide with each other. Since the source of the fixing force is the extension force of the helical spring 39c, a constant fixing force is always obtained.

Next, a method for removing the puncture adapter 1c from the intracavity ultrasonic probe 41c will be described. When the knob 21c is pulled rightward, the helical spring 39c is compressed, and the knob 21c slides rightward (rearward).
For this reason, the distance between the key portion 5c and the saddle portion 29c is increased, and the thinnest portion of the shaft portion 43c can be removed from the saddle portion 29c. Then, when the key portion 5c is removed from the key hole 47c, both are removed. Can be separated.

According to the third embodiment, the puncture adapter 1c is connected to the keyhole 47 provided at the tip of the shaft 43c.
c and the tapered shape 55c that gradually becomes thicker from the center to the tip of the shaft portion 43c, so that the needle guide 3c of the puncture adapter becomes shorter, so that a puncture needle having the same length as the conventional one can be used. The effective length, which is the length of the puncture needle projecting from the tip of the puncture adapter, can be increased. Therefore, it is possible to perform a puncture operation on a deeper part of the subject than before.

FIG. 7 shows a fourth embodiment of the puncture adapter according to the present invention.
8A and 8B are a front view and a cross-sectional view, respectively, showing an embodiment of the present invention. FIG. 8 is a side view showing a state in which the puncture adapter is attached to an intracorporeal ultrasonic probe.

According to FIG. 7, a puncture adapter 1d according to the fourth embodiment has a substantially cylindrical needle guide 3d through which a puncture needle (not shown) is inserted, and a front and rear portion at the rear end of the needle guide 3d. A movable knob portion 21d and a needle guide 3d
Helical spring 39d provided on the outer periphery of the
7d.

At the tip of the needle guide 3d, a key-shaped portion 5d, which is a projection inclined forward, is provided. Needle guide 3
A large diameter portion 7d for locking the rear end of the helical spring 39d is provided slightly forward from the rear end of the large diameter portion 7d.
At the rear end, an insertion port 11d for a puncture needle (not shown) is opened in a funnel shape.

The knob 21d is composed of a substantially cylindrical knob main body and a saddle-shaped portion 29d provided continuously below the knob main body.
Consists of Further, the knob body 21d is provided with a small-diameter hole 25d having an opening at the rear end and a large-diameter hole 27d having an opening at the front end following the small-diameter hole 25d,
The helical spring 39d compressed from its natural length and the large diameter portion 7d of the needle guide 3d are slidably inserted into the large diameter hole 27d.

The saddle-shaped portion 29d has a substantially frustoconical cylindrical shape having a cut-out portion 31d slightly wider than a thinnest portion of a shaft portion, which will be described later, part of which is parallel to the axis. Is increased to a tapered shape 33d.

The rear end of the needle guide 3d is provided with a groove 9d which goes around the outer periphery thereof. An E-ring 37d is fitted in the groove 9d, and the extension force of the helical spring 39d is applied to the knob. 21d is locked so as not to be pushed backward from the position of the E-ring 37d.

FIG. 8 shows this puncture adapter 1d, for example,
The state attached to the ultrasonic probe 41d in a body cavity is shown. The intracavity ultrasonic probe 41d has a rod-shaped shaft portion 43 having a built-in ultrasonic vibrator (not shown) at its distal end.
d and a grip portion 45 following the rear end of the shaft portion 43d.
d, and pulled out from the rear end of the grip portion 45d, and inserted into an ultrasonic diagnostic apparatus (not shown).
And a cord 61d for connecting the.

A keyhole 47d is provided on the side surface (upper surface) near the distal end of the shaft portion 43d of the intracavity ultrasonic probe 41d to be fitted with the key-shaped portion 5d of the puncture adapter 1d. Also, the shaft portion 43d of the intracavity ultrasonic probe 41d has a tapered shape 55d whose center portion is the thinnest and gradually becomes thicker toward both ends thereof.
The tapered shape 55d is formed so as to match the tapered shape 33d of the saddle-shaped portion 29d of the puncture adapter 1d.

Next, a method of attaching the puncture adapter 1d to the ultrasonic probe 41d in the body cavity will be described. First, the key-shaped part 5d of the needle guide 3d is inserted into the body cavity ultrasonic probe 41d.
When the knob 21d is pressed and shrunk leftward, the helical spring 39d is compressed, and the knob 21d slides leftward (forward).

For this reason, the distance between the key-shaped portion 5d and the saddle-shaped portion 29d is reduced, and the thinnest portion of the shaft portion 43d can be inserted into the saddle-shaped portion 29d through the notch 31d of the saddle-shaped portion 29d. In this state, when the pressing force of the knob portion 21d is gradually weakened and released, the saddle portion 29d is pressed against the rear of the shaft portion 43d by the extension force of the helical spring 39d, and the mounting is completed.

This state is sufficiently stable because the fitting of the key-shaped portion 5d and the keyhole 47d and the tapered shape 33d of the saddle-shaped portion 29d and the tapered shape 55d of the shaft portion 43d coincide with each other. Since the source of the fixing force is the extension force of the helical spring 39d, a constant fixing force can always be obtained.

Next, a method of removing the puncture adapter 1d from the intracavity ultrasonic probe 41d will be described. When the knob 21d is pressed and contracted to the left, the helical spring 39d is compressed, and the knob 21d slides leftward (forward). Therefore, the distance between the key-shaped portion 5d and the saddle-shaped portion 29d is reduced, and the thinnest portion of the shaft portion 43d is connected to the saddle-shaped portion 29d.
d, and then the key-shaped part 5d can be removed from the keyhole 47d.
Can be separated from each other.

Although the preferred embodiments have been described above, they do not limit the present invention. For example, in the embodiments, the structure in which the puncture adapter is attached to the intracavity ultrasonic probe has been described. However, it is obvious that the present invention can be applied to other ultrasonic probes.

[0065]

As described above, according to the present invention, when attaching the puncture adapter to the ultrasonic probe, the trouble of screwing the fixing screw is eliminated, and the puncture adapter can be attached by a simple operation.

Further, according to the present invention, it is possible to provide a puncture adapter in which the fixing force of the puncture adapter does not vary due to the screwing force of the operator, and the optimum fixing force by the spring can always be obtained. effective.

Further, according to the present invention, since the needle guide can be shortened, the effective length of the puncture needle becomes longer, and it is possible to perform a deeper puncture using a puncture needle having the same length as the conventional one. effective.

[Brief description of the drawings]

FIG. 1 is a front view (a) and a cross-sectional view (b) showing a puncture adapter according to a first embodiment of the present invention.

FIG. 2 is a side view showing a state in which a puncture adapter according to a second embodiment is attached to an ultrasonic probe.

FIG. 3 is a front view (a) and a cross-sectional view (b) showing a second embodiment of the puncture adapter according to the present invention.

FIG. 4 is a side view showing a state in which the puncture adapter according to the second embodiment is attached to an ultrasonic probe.

FIG. 5 is a front view (a) and a sectional view (b) showing a third embodiment of a puncture adapter according to the present invention.

FIG. 6 is a side view showing a state where the puncture adapter according to the third embodiment is attached to an ultrasonic probe.

FIG. 7 is a front view (a) and a sectional view (b) showing a puncture adapter according to a fourth embodiment of the present invention.

FIG. 8 is a side view showing a state where a puncture adapter according to a fourth embodiment is attached to an ultrasonic probe.

9A and 9B are a side view and a cross-sectional view of a main part of a conventional puncture adapter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Puncture adapter, 3 ... Needle guide, 5 ... Key-shaped part, 7 ... Large diameter part, 9 ... Groove part, 11 ... Puncture needle insertion port, 21 ... Knob part, 23 ... Pin, 25 ... Small diameter hole, 27 ... Large Diameter hole, 29 ...
Saddle-shaped part, 31 ... cut-out part, 33 ... tapered shape, 37
... E-ring, 39 ... helical spring, 41 ... ultrasonic probe in body cavity, 43 ... shaft part, 45 ... grip part, 47 ...
Key hole, 49: Pin hole, 51: Step portion, 53: Notch portion, 55: Tapered shape, 61: Connection cord.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masateru Nagakura 1385-1, Shimoishigami, Otawara-shi, Tochigi Toshiba Medical Engineering Co., Ltd. Medical Manufacturing Co., Ltd.

Claims (8)

[Claims] 1. An ultrasonic probe having a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion connected to a rear end portion of the shaft portion is attached to the side surface of the shaft portion, and a puncture needle is provided. A puncture adapter held along the ultrasonic probe, comprising: a substantially cylindrical needle guide into which a puncture needle is inserted; a key-shaped portion provided at the tip of the needle guide; and at least one protrusion. A puncture, comprising: a knob that is provided at the rear end of the needle guide so as to be movable back and forth; and a spring that biases the knob forward or backward with respect to the needle guide. adapter. 2. The spring is provided on the outer periphery of the needle guide as a helical spring, and a large-diameter portion is formed at a rear end of the needle guide to lock a rear end of the spring. The portion is provided with at least one pin protruding forward, and has a small-diameter hole having an opening at the front end of the knob, and a large-diameter hole having an opening at the rear end following the hole. The spring and the large-diameter portion of the needle guide are inserted into the large-diameter hole, and the front end of the spring urges the knob portion forward by its extension force, thereby generating ultrasonic waves. The puncture adapter according to claim 1, wherein the puncture adapter is fixed to a probe. 3. The spring is provided on the outer peripheral portion of the needle guide as a helical spring, and a large-diameter portion for locking a front end of the spring is formed near a rear portion of the needle guide. At least one pin projecting rearward thereof, and a small-diameter hole having an opening at the rear end of the knob portion, and a large-diameter hole having an opening at the front end following the hole. The spring and the large-diameter portion of the needle guide are inserted into the large-diameter hole, and the rear end of the spring urges the knob portion rearward by its extension force, so that the ultrasonic probe is The puncture adapter according to claim 1, wherein the puncture adapter is fixed. 4. An ultrasonic probe comprising: a shaft portion having a built-in ultrasonic vibrator at a front end portion; and a grip portion continuous to a rear end portion of the shaft portion, wherein a keyhole is provided on a front end side surface of the shaft portion. 4. The puncture adapter according to claim 1, wherein at least one pin hole is provided at a rear end of the shaft portion, and the key-shaped portion of the puncture adapter according to claim 1 is fitted into the key hole. 4. The ultrasonic probe according to claim 2, wherein the protrusion of the puncture adapter or the pin of the puncture adapter according to claim 2 or 3 is fitted in the pin hole. 5. An ultrasonic probe having a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion connected to a rear end portion of the shaft portion is attached to a side surface of the shaft portion of the ultrasonic probe, and a puncture needle is provided. A puncture adapter which is held along the ultrasonic probe, wherein the needle guide has a substantially cylindrical shape into which a puncture needle is inserted; a key-shaped portion provided at a distal end portion of the needle guide; A puncture adapter comprising: a tapered saddle-shaped portion movably provided at the rear end in a front-rear direction; and a spring for urging the saddle-shaped portion forward or rearward with respect to the needle guide. . 6. The spring is provided on the outer periphery of the needle guide as a helical spring, and a large-diameter portion is formed at a rear end of the needle guide to lock a rear end of the spring. The hole is provided with a small-diameter hole having an opening at the front end thereof and a large-diameter hole having an opening at the rear end following the hole. The large-diameter hole has a large diameter of the spring and the needle guide. The puncture adapter according to claim 5, wherein a diameter portion is inserted, and the front end of the spring is fixed to the ultrasonic probe by urging the knob portion forward by its extension force. 7. The spring is provided on the outer peripheral portion of the needle guide as a helical spring, and a large-diameter portion for locking a front end portion of the spring is formed near a rear portion of the needle guide. A small-diameter hole having an opening at the rear end thereof and a large-diameter hole having an opening at the front end following this hole are provided. The large-diameter hole includes the large-diameter portion of the spring and the needle guide. The puncture adapter according to claim 5, wherein the puncture adapter is inserted into the puncture adapter, and the rear end of the spring urges the knob portion rearward by the extension force thereof to be fixed to the ultrasonic probe. 8. An ultrasonic probe having a shaft portion having a built-in ultrasonic vibrator at a front end portion and a grip portion continuous to a rear end portion of the shaft portion, wherein a central portion of the shaft portion has both ends. The puncture according to any one of claims 5 to 7, wherein the puncture adapter is formed into a taper shape that is thinner and matches the taper shape of the saddle-shaped portion of the puncture adapter according to any one of claims 5 to 7. An ultrasonic probe comprising: a keyhole into which a key-shaped part of an adapter fits, provided on a side surface of a front end of the shaft part.