JP6328993B2 - Medical needles used under observation with an ultrasound diagnostic device - Google Patents

Description

The present invention relates to a medical needle, and more particularly to the technical field of a medical needle used under observation with an ultrasonic diagnostic apparatus such as an ultrasonic puncture needle or an indwelling needle that can be viewed under an ultrasonic image. Is.

In general, in the medical field, as a medical needle, an indwelling needle used for intravenous injection or infusion, a part of a human body or cell for definitive diagnosis of a lesion, etc., or a nerve accurately Various medical needles such as puncture needles (biopsy needles, insulated electrode injection needles, nerve block needles, central venous needles, egg collection needles, etc.) that can be searched for are used. In this case, it is necessary to accurately recognize the position of the puncture needle or indwelling needle punctured in the body. In such a case, an ultrasonic diagnostic device is used to display an ultrasonic echo from the medical needle punctured in the body as a display image. The position of the medical needle is recognized. When this is a puncture needle, an attempt has been made to accurately grasp whether or not the tissue collection part at the tip of the puncture needle has reached the lesion.
By the way, an ultrasonic diagnostic apparatus irradiates a medical needle in the body with ultrasonic waves transmitted from an ultrasonic transducer as an ultrasonic transmission element, and detects an ultrasonic echo (reflected wave) from the medical needle. It is received by the toucher, processed and displayed on the display. However, if the medical needle is made of metal such as stainless steel, the ultrasonic probe is not used if it is simply cylindrical. There is a problem that it is difficult to display the medical needle on the display because the ultrasonic echoes that can be received by the tentacle are weak.
Therefore, there is known a technique in which a concave display is provided on the outer peripheral surface of a medical needle in a circular shape or in a dotted manner so that an ultrasonic echo can be clearly displayed (Patent Document 1, 2). However, these have problems in that the outer peripheral surface of the medical needle has irregularities in the puncture direction, so that puncture resistance occurs and it is difficult to puncture, and the pain at the time of puncture is great and the patient suffers.
Therefore, it has been proposed to prevent the puncture resistance from occurring by forming irregularities on the inner peripheral surface of the needle (see Patent Document 2).

JP 2011-125632 A JP 2011-67641 A

  However, since the ultrasonic waves are reflected on the needle surface (outer peripheral surface) in forming irregularities on the inner peripheral surface of the needle, the display display is improved when the irregularities are formed in the needle tube. Will hardly work. In order to generate ultrasonic echoes to such a level that image processing is possible, the needle exposure surface must be uneven, but the medical needle has a cut surface at the tip of the needle that is the inner peripheral surface of the needle. However, since the area of the needle cut surface is small, it is difficult to recognize the image because it is possible to form only a very small unevenness, and only the pointed echo image of the needle tip part is recognized. There is a problem that the position and direction of the needle tube are not known, and as a result, it is difficult to specify the position of the needle tip. This is the problem to be solved by the present invention.

The present invention has been made in order to solve these problems in view of the above circumstances, and the invention of claim 1 is a medical needle for puncturing the body, the medical needle Under observation with an ultrasonic diagnostic apparatus, a linear groove long in the needle length direction is formed on the outer peripheral surface, the groove bottom of the groove is open, and a resin tube is inserted into the needle. It is a medical needle used in .
According to a second aspect of the present invention, the groove is formed so as to correspond to the most proximal side position of the taper cut surface of the needle tip. The groove is used under observation with the ultrasonic diagnostic apparatus according to the first aspect. it is a medical needle.
The invention according to claim 3 is characterized in that the resin tube is subjected to processing for irregularly reflecting ultrasonic waves, and the medical needle used under observation with the ultrasonic diagnostic apparatus according to claim 1 or 2 It is.
According to a fourth aspect of the present invention, the resin tube has a tip portion that extends to a portion where the taper cut surface of the needle is formed, and the tube tip portion is formed on the taper cut surface so as not to come out of the taper cut surface. The medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 3, wherein the medical needle is inclined along the line.
According to a fifth aspect of the present invention, the processing for irregularly reflecting ultrasonic waves is also applied to the tip of the resin tube. The medical use used under observation with the ultrasonic diagnostic apparatus according to the fourth aspect It is a needle.
According to a sixth aspect of the present invention, in the ultrasonic diagnostic apparatus according to any one of the first to fifth aspects, the inner peripheral surface of the needle is subjected to processing for irregularly reflecting ultrasonic waves. It is a medical needle used under observation .
The invention of claim 7, processing to diffuse the ultrasound observation ultrasonic diagnostic apparatus according to claim 6, characterized in that it also applied to the probe tip portion of the tapered cut surface is formed It is a medical needle used below .
The invention according to claim 8 is the medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 7, wherein the groove is embedded with a resin material.
The invention according to claim 9 is the medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 8, characterized in that the needle tip portion of the groove is connected.
The invention according to claim 10 is characterized in that the tip of the groove is located at the needle base position with respect to the taper cut surface, and medical treatment used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 9. It is a needle.
The invention according to claim 11 is the medical needle used under observation with the ultrasonic diagnostic apparatus according to claim 10, wherein the needle tip portion to be tapered is not provided with a groove.

Since the groove is formed on the surface of the medical needle and the image recognition based on the ultrasonic echo can be satisfactorily performed by the invention of claim 1, the groove is a straight line long in the needle length direction. The shape of the medical needle in the puncture direction is not uneven and is maintained in the same shape. As a result, the puncture resistance is increased and the puncture does not become difficult, and the pain during puncture is alleviated. Since the image is recognized as a long one, the position of the puncture needle is surely specified with excellent visibility. Moreover, the ultrasonic echo reflected from the inner peripheral surface of the medical needle can be observed through the groove, so that the medical needle can be reliably recognized. In addition, since the chemical solution does not leak from the groove because the chemical solution passes through the resin tube, it contributes to shielding the ultrasonic echo generated from inside the needle through the opened groove bottom, The ultrasonic echo is equivalent to that of the closed groove bottom, and there is little occurrence of white shadows, and the ultrasonic echo has a thick and firm needle outline.
According to the invention of claim 2, when the needle tip is punctured, the groove is punctured at the end of the taper cut surface. Therefore, smooth puncture can be performed.
By setting it as invention of Claim 3 , the process for irregularly reflecting the ultrasonic wave formed in a resin tube will reflect an ultrasonic echo more, and a reliable visual recognition can be performed.
According to the invention of claim 4 , since the resin tube reaches the taper cut surface of the needle tip, the reflection of the ultrasonic echo by the resin tube at the needle tip portion comes out without being disturbed by the needle material. Although it is excellent in visibility, the resin tube does not come out of the tapered surface, and the puncture property is not impaired.
According to the invention of claim 5 , the processing for irregularly reflecting the ultrasonic waves is applied to the tip of the resin tube that is not obstructed by the needle material, thereby exhibiting better visibility. can do.
According to the invention of claim 6 , the processing for irregularly reflecting the ultrasonic waves is applied to the tapered cut surface, the reflection of the ultrasonic echoes is excellent, and the visibility can be improved.
By making it the invention of claim 7 , the processing for irregularly reflecting the ultrasonic waves is applied to the needle tip portion which is not obstructed by the needle material, and exhibits better visibility. be able to.
According to the invention of claim 8 , the groove is formed in the medical needle and the visibility of the ultrasonic echo can be improved, but the groove is embedded with a resin material, and the puncture property is excellent. At the same time, the irregular reflection of ultrasonic waves is promoted by the resin material.
According to the ninth aspect of the present invention, since a groove having an open groove bottom is formed and the needle tip portion of the groove is connected, there is no occurrence of a remaining portion when puncturing, and reliable puncturing is achieved. It will be possible.
According to the invention of claim 10 , since the groove is formed after the puncture along the taper cut surface, the puncture is ensured and the puncture resistance is reduced.
According to the eleventh aspect of the present invention, since the groove is formed after the puncture along the taper cut surface is made, the puncture is sure and the puncture resistance is reduced.

(A)-(D) are the principal part enlarged plan views of the puncture needle of 1st-4th embodiment, and the principal part front view expanded further. (A)-(D) are the principal part enlarged plan views of 5th-8th embodiment, the principal part front view which expanded further, (E) is the principal part enlarged plan view of 9th Embodiment. . (A)-(C) are the principal part enlarged plan views of 10th-12th embodiment. (A), (B) is the principal part expanded sectional side surface of 13th, 14th embodiment. (A) is an enlarged sectional side view and an enlarged sectional front view of the principal part of the fifteenth embodiment, (B) is an enlarged sectional side view of the essential part of the sixteenth embodiment, and (C) and (D) are the It is an expanded sectional front view of 17th and 18th embodiment. (A) is the principal part expanded sectional side surface and enlarged sectional front view of 19th Embodiment, (B) is the principal part expanded sectional side surface of 20th Embodiment. (A) is an experimental example and (B) is a drawing substitute photograph of an ultrasonic echo showing a comparative example.

Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a puncture needle used under observation with an ultrasonic diagnostic apparatus, and the puncture needle 1 is formed with linear grooves 2 and 3 that are long in the needle length direction on the outer peripheral surface. As an example of such a groove, the groove bottom 2a of the groove 2 is closed as shown in FIG. 1, and the groove bottom of the groove 3 is opened as shown in FIG. As shown in FIG. 3, there are illustrated those having both the grooves 2 and 3 that are closed and those that are closed as shown in FIG. 3.
Incidentally, the grooves 2 and 3 are not limited to one, and two or more plural grooves can be formed in the circumferential direction of the puncture needle 1.

  As shown in FIG. 1, the groove bottom 2a is closed as in the first embodiment shown in FIG. 1A, and the groove 2 is shaped like a square, as in the second embodiment shown in FIG. Various shapes such as a V-shaped one and an arc-shaped one as in the third embodiment shown in FIG. Further, in the fourth embodiment shown in FIG. 1 (D), the groove 2 is formed slightly from the needle base side position, avoiding the taper cut surface 1a of the needle tip. By doing so, the groove 2 is punctured after puncturing with the taper cut surface 1a, and there is an advantage that normal puncture with the taper cut surface 1a can be performed.

Further, as the groove 3 with the groove bottom opened, in FIG. 2, the groove side surface 3a is parallel as in the fifth embodiment shown in FIG. 2A, and the sixth embodiment shown in FIG. Various shapes such as those in which the groove side surface 3b has a V-groove shape as in the form of can be used.
In the fifth and sixth embodiments, the taper cut surface 1a at the tip of the opened groove portion needle reaches the inner periphery of the needle hole. Thus, as in the seventh embodiment shown in FIG. 2 (C), the groove bottom 3c is formed up to the middle position of the needle base side position 1b of the taper cut surface 1a, as shown in FIGS. 2 (D) and 2 (E). As shown in the eighth and ninth embodiments, the groove 3 can be formed slightly from the needle base side position, avoiding the taper cut surface 1a of the needle tip. It is possible to avoid the occurrence of the uncut portion due to the tip.
Incidentally, the grooves 2 and 3 may be long enough to reach the proximal end of the puncture needle 1, but may be half lengths (for example, 1/2, 1/3, 2/3, etc. of the needle length). Further, a plurality of grooves 3 may be formed at intervals as in the ninth embodiment of FIG. 2E (describes the case of the grooves 3).

  Further, a groove in which both grooves 2 and 3 are formed as in the tenth embodiment of FIG. 3 (A), in this case the groove as in the eleventh embodiment shown in FIG. 3 (B). 2 and 3 are alternately formed, and the groove widths of the grooves 2 and 3 are made different as in the twelfth embodiment shown in FIG. 3 (C). Although it is wide, it can of course be reversed.

Further, as in the thirteenth and fourteenth embodiments shown in FIGS. 4 (A) and 4 (B), the inner peripheral surface of the puncture needle is subjected to processing for irregularly reflecting ultrasonic waves. In particular, the V-shaped concave groove 1c is formed in a ring shape around the inner circumference, so that the ultrasonic echo diffusely reflected by the concave groove 1c provided in the needle is observed through the groove 3. As a result, visibility is improved. In this case, the concave groove 1c can be formed corresponding to the groove 3 as in the thirteenth embodiment, but the inner periphery of the tapered cut surface 1a as in the fourteenth embodiment. In this case, the visibility of the needle tip portion where the tapered cut surface 1a is formed can be improved. In this case, the concave groove 1c has a tapered cut surface 1a. It is preferable that the concave cut 1c does not have a jagged shape on the tapered cut surface 1a when the percut surface 1a punctures, thereby preventing puncture resistance.
When the concave groove 1c is formed, the concave groove 1c may reach the needle base position, but may also reach the middle position as shown in FIG. Further, the processing for irregularly reflecting ultrasonic waves on the inner peripheral surface of the puncture needle may be a groove (one or more may be more than one) long in the needle length direction, or a lattice-shaped groove. The shape is not particularly limited.

Furthermore, since the groove 3 has a problem that the chemical solution leaks if the groove bottom is left open, it cannot be used when injecting the chemical solution. Therefore, the fifteenth embodiment shown in FIG. Of course, the resin tube 4 may be inserted into the needle tube as shown in FIG. The resin tube 4 needs to use a material that is not harmful to the human body, and a resin material such as polytetrafluoroethylene is exemplified. In this case, as in the sixteenth embodiment shown in FIG. 4 (B), the tip portion 4a of the resin tube 4 can reach the needle tip portion where the tapered cut surface 1a is formed, In this case, the tip portion 4a of the resin tube 4 is preferably tapered so as not to come out of the taper cut surface 1a.
Further, when the resin tube 4 is inserted, as in the seventeenth embodiment shown in FIG. 5C, the resin material 4b (the resin material 4b may be integral with or separate from the resin tube 4). ) May be used to close the groove 3, and when the main purpose is to close the groove 3, the resin material 5 may be used to form the groove 3 as in the eighteenth embodiment shown in FIG. You may make it block. In this case, in addition to the visual recognition of the ultrasonic echo due to the provision of the groove 3, the presence of the resin material 4b, 5 on the surface of the needle tube promotes the irregular reflection of the ultrasonic wave at this portion, and further visibility. Improvement can be achieved.

Further, when the resin tube 4 is further inserted, as in the nineteenth and twentieth embodiments shown in FIGS. 6A and 6B, the inner peripheral surface (even the outer peripheral surface) of the resin tube 4 is used. Of course, processing for irregularly reflecting ultrasonic waves can be performed, and in this case, the V-groove 4c can be formed. In this case, in addition to visual recognition of the ultrasonic echo by providing the groove 3 In addition to the improvement in the visibility of the ultrasonic echo that the diffused reflection due to the presence of the resin tube 4 provided in the puncture needle 1 leaks out of the groove 3, it is irregularly reflected due to the presence of the concave groove 4c. Improvement of the visibility of the ultrasonic echo due to the leakage of the object from the groove 3 can be achieved, so that the ultrasonic echo that is long in the needle length direction can be superimposed and the visibility can be improved.
In this case, the distal end portion 4a of the resin tube 4 may be tapered so as not to protrude from the tapered cut surface 1a, and the concave groove 4c may be formed up to the distal end portion 4a.
Incidentally, since the processing for ultrasonic echo recognition on the inner peripheral surface of the resin tube 4 only has to diffusely reflect the ultrasonic waves, the processing is not limited to the concave grooves, and may be, for example, a textured shape.

Next, an image processed as an ultrasonic echo together with a comparative example using a puncture needle in which the present invention is actually implemented will be described.
As the puncture needle, an outer diameter of 21G (21 gauge: outer diameter 0.82 mm) was prepared, but as a puncture needle specifically prepared, as a comparative example, a commercially available seamless needle was prepared, As an experimental example, according to the third embodiment shown in FIG. 1 (C), an arc-shaped groove having a groove width of 0.093 mm and a groove depth of 0.041 mm closed is formed. A puncture needle was prepared. Further, FIG. 7 shows a photograph in which agar is prepared as a substitute for the human body and image processing is performed by ultrasonic echoes in a state where a puncture needle corresponding to the agar is punctured. 7A is an ultrasonic echo photograph of the puncture needle of the experimental example, and FIG. 7B is an ultrasonic echo photograph of the puncture needle of the comparative example.
From these photographs, the comparative example (FIG. 7B) has a white shadow only on the needle tip portion, and the needle tube portion cannot be visually recognized, but the experimental example (FIG. 7A). ) Can be visually recognized as a linear white shadow not only at the needle tip but also at the needle tube, so that the directionality of the needle can be confirmed well and is sufficiently practical as an ultrasonic puncture needle. It is recognized that there is.

  In addition, this invention is not limited to the thing of the said embodiment, It can implement as long as it is a medical needle normally known, such as an indwelling needle used for intravenous injection or infusion.

  The present invention relates to a medical needle, and in particular, can be used as an ultrasonic medical needle that is visible under an ultrasonic image.

1 Puncture Needle 1a Tapered Cut Surface 1c Groove 2 Groove 3 Groove 4 Resin Tube 4c Groove

Claims (11)

A medical needle for puncturing into a body, wherein the medical needle has a linear groove that is long in the needle length direction on the outer peripheral surface, the groove bottom of the groove opens, and a resin tube is inserted into the needle. A medical needle used under observation with an ultrasonic diagnostic apparatus . 2. The medical needle used under observation with an ultrasonic diagnostic apparatus according to claim 1, wherein the groove is formed corresponding to the most proximal position of the taper cut surface of the needle tip. The medical needle used under observation with an ultrasonic diagnostic apparatus according to claim 1 or 2, wherein the resin tube is processed to diffusely reflect ultrasonic waves. The resin tube is formed with a tip extending to the portion where the taper cut surface of the needle is formed, and the tube tip is inclined along the taper cut surface so as not to come out of the taper cut surface. The medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 3. The medical needle used under observation with an ultrasonic diagnostic apparatus according to claim 4, wherein the processing for irregularly reflecting ultrasonic waves is also applied to the tip of the resin tube. The medical use used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 5, wherein an inner peripheral surface of the needle is processed to diffusely reflect ultrasonic waves. needle. The medical needle used under observation with an ultrasonic diagnostic apparatus according to claim 6, wherein the processing for irregularly reflecting ultrasonic waves is also applied to a needle tip portion on which a tapered cut surface is formed. . The medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 7, wherein the groove is embedded with a resin material. The medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 8, wherein the needle tip portion of the groove is connected. The medical needle used under observation with the ultrasonic diagnostic apparatus according to any one of claims 1 to 9, wherein the tip of the groove is located at a needle base position with respect to the taper cut surface. The medical needle used under observation with the ultrasonic diagnostic apparatus according to claim 10, wherein the needle tip portion to be taper-cut has no groove.