JP2597963Y2 - Ultrasonic probe with puncture adapter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic probe to which a puncture adapter is detachably mounted.

[0002]

2. Description of the Related Art There is known an ultrasonic probe for insertion into a body cavity for performing ultrasonic diagnosis by being inserted into a body cavity such as the rectum or vagina. When using the ultrasonic probe to perform tissue collection or the like by puncturing while watching an ultrasonic image, a puncture adapter is attached to the probe body, a puncture needle is attached to the puncture adapter, and the desired Puncture the site. The conventional puncture adapter has been attached to the probe main body by a member such as a screw.

[0003]

Therefore, the attachment and detachment of the puncture adapter has been complicated. Therefore, a mechanism that can be attached and detached with one hand by one hand has been demanded.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a mechanism for facilitating attachment and detachment of a puncture adapter mounted on a probe main body.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a probe comprising an insertion portion having a distal end for transmitting and receiving ultrasonic waves and a grip portion connected to a base end of the insertion portion. A probe body, and a puncture adapter detachably attached to the probe body and holding a puncture needle, wherein an insertion portion of the probe body gradually increases in diameter toward the distal end. A first tapered portion, and a second tapered portion gradually increasing in diameter toward the base end portion, wherein the puncture adapter straddles the first tapered portion. A first forked portion that engages with the first forked portion, a distance to the first forked portion is made expandable and contractable, and a second forked portion that is engaged across the second tapered portion; A biasing means for generating a biasing force in a direction in which the first forked portion and the second forked portion are separated from each other.

The invention according to claim 2 is characterized in that at least one pair of engagement projections and engagement recesses is provided at an engagement portion between the tapered portion and the forked portion.

[0007]

According to the structure of the first aspect, when the puncture adapter is mounted on the probe main body, first, one forked portion is straddled over the corresponding one tapered portion. Next, the other forked portion is pulled back toward the one forked portion,
While maintaining that state, the other forked portion is straddled over the other forked portion. Then, if the pullback force is relaxed, the biasing means separates one forked portion from the other forked portion,
The other forked portion will be firmly engaged with the other tapered portion. At this time, the one forked part is also firmly engaged with the one forked part. That is, the puncture adapter can be attached to the probe main body by the two forked portions projecting from the two tapered portions. In the case of detachment, it is only necessary to extend and contract once, contrary to the above, and then remove it.

According to the second aspect of the invention, the positioning and rotation of the forked portion can be controlled by the engagement projection and the engagement recess.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the appearance of a puncture adapter (hereinafter, referred to as an adapter) 10 in the ultrasonic probe with a puncture adapter according to the present invention. The adapter 10 holds the puncture needle and is detachably attached to a probe main body (hereinafter, referred to as main body) 12 shown in FIG. 5 and the like. Note that the adapter 10 is attached to the main body 12 in a state in which the balloon is covered, but the balloon is not shown for simplification of the drawing.

Here, the shape of the main body 12 will be described first. As shown in FIG. 5, the main body 12 includes an insertion portion 14 and a grip portion 16. The insertion portion 14 includes a distal end portion 18 having a built-in ultrasonic vibrator and an insertion shaft portion 20 connected thereto.
It is larger and larger than the diameter, and is rounded as a whole. Although the cross section is substantially circular, the present invention can be applied to an elliptical shape.

The insertion shaft portion 20 has a circular cross section,
As shown in the figure, the middle part is constricted. The tapered portion 22 is formed on the distal end side, that is, the diameter of the tapered portion 22 gradually increases toward the distal end portion 18 side. In addition, the insertion shaft portion 20 has a tapered portion 24 formed on the base end side. The diameter of the tapered portion 24 gradually increases toward the base end side (the grip portion 16 side). That is, the diameter is formed as thin as possible except for the part indispensable for the function, and the pain and discomfort to the living body are reduced.

Returning to FIG. 1, FIG.
0 is a top view, (B) is a front view, and (C) is a bottom view.

FIG. 2 shows a longitudinal section (longitudinal section) of the adapter 10, and FIG. 3 shows a transverse section (section near the forked portion 36) of the adapter 10 together with the main body 12. As shown in FIG.

In FIG. 2, the adapter 10 is roughly divided into a first member 26 and a second member 28 which can be moved back and forth with respect to the first member 26.

The first member 26 includes a frame 30, a guide tube 32, and a tubular member 34. Here, the frame 30 is made of, for example, a member such as Teflon, and holds the guide tube 32 at an upper portion.
While the front part of the guide tube 32 is housed inside, the guide tube 3
The second tip opening 32a is exposed from the tip. Also,
The lower surface of the frame 30 is formed in a shape that matches the shape of the insertion portion 14 of the main body 12.

The frame 30 has a forked portion 36 which straddles and engages with the tapered portion 22 described above. As shown in FIG. 3, the forked portion 36 has a substantially semicircular cross-sectional shape. Inside the forked portion 36, in the present embodiment, three projections 38 are formed. Engage with a concave portion 40 formed in 22. In addition, as shown in FIG. 4, the protrusion 39 may be formed on the main body 12 side, and the concave portion 41 may be formed on one forked portion 36 side.

On the other hand, as shown in FIG.
8 is a hollow member 42, a cap 44, a forked portion 46
And is composed of Here, the hollow member 42 penetrates the tubular member 34 containing the guide tube 32 so as to be able to advance and retreat. Further, the cylindrical member 3 is provided inside the hollow member 42.
A spring 48 wound around the cylindrical member 34 is disposed, and a base wall 42A of the hollow member and the spring receiver 3 of the tubular member 34 are provided.
4A, an elastic biasing force is generated so as to widen the space between the two. The spring receiver 34A is provided by the stopper 50.
As a result, the extension movement of the spring is regulated to a certain limit.

The bifurcated portion 46 engages over the tapered portion 24 and has three projections 52. These projections 52 engage with three concave portions 54 formed in the tapered portion 22.

Next, a method of attaching the adapter 10 to the main body 12 will be described with reference to FIGS.

First, in FIG. 5, the main body 12 is held with one hand and the adapter 10 is held with the other hand. Next, in FIG. 6, while making the forked portion 46 straddle the tapered portion 24,
Push into the proximal end. Then, the spring 4 shown in FIG.
8, the first member 26 slides toward the second member 28 side. That is, the interval between the forked portion 46 and the forked portion 36 is reduced, and the forked portion 36 can be straddled by the tapered portion 22.

FIG. 7 shows a state immediately after that, in which the protrusions and the recesses are engaged with each other to position the forked portion 46 and at the same time restrict the rotation of the forked portion 46. In this state, the retracted spring 42 is released.

Then, as shown in FIG. 8, the first member 26 advances in the distal direction, and as a result, the forked portion 36 is engaged with the tapered portion 22. That is, the diameter of the tapered portion 22 gradually increases, and since the inner diameter of the forked portion 36 hardly changes, the two portions can be fitted by the urging force of the spring 42. In this case, the projection 38 is engaged with the concave portion 40, and the positioning and rotation are restricted.

That is, by forcing the two forked portions of the adapter 10 between the tapered portion 22 having a larger diameter in the distal direction and the tapered portion 24 having a larger diameter in the proximal direction, the adapter 10 Can be easily and reliably attached to the main body 12. Then, in the mounted state, since the urging force of the spring is always applied, the reliable mounted state can be maintained.

When the adapter is detached, the adapter can be easily detached by pushing the second member 28 back toward the base end.

[0026]

[Effects of the Invention] As described above, according to the present invention,
The puncture adapter can be easily and reliably attached to the probe main body.

[Brief description of the drawings]

FIG. 1 is an external view of a puncture adapter according to the present invention.

FIG. 2 is a sectional view of a puncture adapter.

FIG. 3 is a sectional view of a forked portion.

FIG. 4 is a sectional view of a forked portion.

FIG. 5 is an explanatory diagram showing how to attach a puncture adapter to a probe main body.

FIG. 6 is an explanatory diagram showing how to attach an adapter to a main body.

FIG. 7 is an explanatory view showing how to attach an adapter to a main body.

FIG. 8 is an explanatory view showing how to attach an adapter to a main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Puncture adapter 12 Probe body 22, 24 Tapered part 36 Bifurcated part 38, 52 Projection 40, 54 Concavity 46 Bifurcated part

Claims (2)

(57) [Scope of request for utility model registration] 1. A probe main body comprising an insertion portion having a distal end for transmitting and receiving an ultrasonic wave and a grip portion connected to a base end of the insertion portion, and a probe body detachably attached to the probe main body. A puncture adapter for holding a puncture needle, wherein the insertion portion of the probe main body has a first tapered portion gradually increasing in diameter toward the distal end portion, and a distal end portion toward the proximal end portion. The second gradually increased in diameter
A piercing adapter, wherein the puncture adapter has a first bifurcated portion that straddles and engages with the first tapered portion, and a distance to the first bifurcated portion is expandable and contractable. A second forked portion that straddles and engages with the second tapered portion; and an urging means for generating an urging force in a direction in which the first forked portion and the second forked portion are separated from each other. An ultrasonic probe with a puncture adapter, comprising: 2. The ultrasonic probe with a puncture adapter according to claim 1, wherein at least a pair of engagement projections and engagement recesses are provided at an engagement portion between the tapered portion and the forked portion. Tentacles.