Puncture needle

Abstract

The invention provides a puncture needle capable of ensuring echo visibility of the puncture needle and further grasping puncture length. The puncture needle is provided with a rod-shaped main body part, a first ultrasonic wave reflecting structure formed on the main body part, and a second ultrasonic wave reflecting structure formed on the main body part and arranged closer to the base end side of the main body part in the axial direction than the first ultrasonic wave reflecting structure, wherein the second ultrasonic wave reflecting structure and the first ultrasonic wave reflecting structure are arranged separately in the axial direction.

Description

Technical Field

[0001] The present disclosure relates to a puncture needle. Background Art

[0002] Japanese Patent Application Publication No. 2010-190413 (Patent Document 1) discloses an ultrasonic endoscope puncture needle having a plurality of recesses formed on the outer peripheral surface near the front end of a needle tube puncturing a living body tissue, for increasing the reflection intensity of an ultrasonic echo. In the ultrasonic endoscope puncture needle, each recess has an ultrasonic reflection surface formed from the surface of the needle tube toward the inside and obliquely backward, and the wall thickness of the needle tube is cut off so that the space in the direction perpendicular to the ultrasonic reflection surface is not blocked by the wall of the needle tube. In the ultrasonic endoscope puncture needle, the ultrasonic echo of the front end portion of the needle tube puncturing the living body tissue can be effectively increased, and a clear ultrasonic echo image of the needle tube can be obtained.

[0003] Japanese Patent Publication No. 2011-125632 (Patent Document 2) discloses an ultrasonic guided puncture needle for detecting a position while performing puncture using the reflection of ultrasonic waves, and an indwelling needle having the ultrasonic guided puncture needle. The puncture needle has a groove portion on the outer peripheral surface for reflecting ultrasonic waves. The groove portion includes: a first groove portion, which is provided at a portion on the back side of the blade surface of the outer peripheral surface; and a second groove portion, which is provided at a portion near the front end portion of the outer peripheral surface where the blade surface is formed. The first groove portion extends in the circumferential direction and faces the blade surface at both ends, and a plurality of groove portions are provided along the axial direction of the puncture needle. In the puncture needle, ultrasonic waves can be reflected more effectively, thereby reliably and accurately confirming the position in the body.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2010-190413

[0005] Patent Document 2: Japanese Patent Application Publication No. 2011-125632

[0006] When performing surgical operations such as puncture with a puncture needle under echo, it is important to accurately grasp the position of the needle tip in order to improve the accuracy of the puncture. In addition, if the puncture length (the depth of puncture with the puncture needle) can be grasped, it is possible to prevent the surrounding tissue from being accidentally damaged.

[0007] However, in the prior art, even if the position of the puncture needle can be confirmed by echo, it is difficult to grasp the puncture length by echo. Summary of the invention

[0008] The present disclosure has been made in view of this actual situation, and an object of the present disclosure is to provide a puncture needle that can ensure the echo visibility of the puncture needle and further grasp the puncture length.

[0009] In order to achieve the above-mentioned purpose, the puncture needle of the present disclosure comprises:

[0010] A rod-shaped main body;

[0011] A first ultrasonic wave reflecting structure formed on the main body; and

[0012] a second ultrasonic wave reflecting structure formed in the main body and arranged closer to the proximal end side of the main body in the axial direction than the first ultrasonic wave reflecting structure;

[0013] The second ultrasonic wave reflecting structure and the first ultrasonic wave reflecting structure are arranged to be separated from each other in the axial direction.

[0014] The puncture needle of the present disclosure may be further configured as follows:

[0015] The main body has a rod-shaped body and a needle tip disposed at the front end of the body.

[0016] The first ultrasonic wave reflecting structure is arranged at the needle tip.

[0017] The second ultrasonic wave reflecting structure is arranged on the trunk portion.

[0018] The puncture needle of the present disclosure may be further configured as follows:

[0019] The first ultrasonic wave reflecting structure is arranged at a distal end portion of the needle tip portion.

[0020] The puncture needle of the present disclosure may be further configured as follows:

[0021] The second ultrasonic wave reflecting structure is a spiral groove formed on the outer peripheral surface of the body portion.

[0022] The puncture needle of the present disclosure may be further configured as follows:

[0023] The needle tip is in a cone shape.

[0024] The puncture needle of the present disclosure may be further configured as follows:

[0025] The trunk is formed into a cylindrical shape,

[0026] The needle tip portion has an opening portion that connects the inner space of the body portion to the outer space.

[0027] The present disclosure can provide a puncture needle that can ensure the echo visibility of the puncture needle and further grasp the puncture length. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a perspective view of the puncture needle according to the first embodiment.

[0029] Figure 2 It is a side view of the needle tip portion of the puncture needle according to the first embodiment.

[0030] Figure 3 It is a diagram for explaining the ultrasonic wave reflection state in the first ultrasonic wave reflecting structure (first structure).

[0031] Figure 4 This is an explanatory diagram of the first structure in the case of being composed of transverse grooves.

[0032] Figure 5 This is an explanatory diagram of the first structure in the case of being composed of intersecting grooves.

[0033] Figure 6 This is an explanatory diagram of the first structure in the case of being composed of a circular recess.

[0034] Figure 7 This is an explanatory diagram of the first structure in the case of being composed of triangular recessed portions.

[0035] Figure 8 It is a diagram for explaining the ultrasonic wave reflection mode in the second ultrasonic wave reflecting structure (reflecting structure portion).

[0036] Fig. 9 This is an explanatory diagram of a reflective structure composed of spiral grooves.

[0037] Fig.10 This is an explanatory diagram of a reflective structure in the case where the reflective structure is composed of an annular groove.

[0038] Fig.11 This is an explanatory diagram of a reflective structure composed of a plurality of annular grooves.

[0039] Fig.12 This is an explanatory diagram of a reflective structure composed of a dotted circular groove.

[0040] Fig.13 This is an explanatory diagram of a reflective structure composed of an annular oblique groove.

[0041] Fig.14 This is an explanatory diagram of a reflective structure composed of arc-arranged grooves.

[0042] Fig.15 This is a side view of the needle tip portion of the puncture needle according to the second embodiment as viewed from the blade side.

[0043] Fig.16 This is a side view of the needle tip portion of the puncture needle according to the second embodiment as viewed from the side opposite to the blade surface.

[0044] Fig.17 This is an explanatory diagram of a case where a first structure consisting of a V-shaped groove is formed on the exposed inner surface.

[0045] Fig.18 This is an explanatory diagram of a case where a first structure consisting of a circular recess is formed on the exposed inner surface.

[0046] Fig.19 This is an explanatory diagram of a case where a first structure consisting of a groove formed from a first blade surface portion through the exposed inner surface to a second blade surface portion is formed on the exposed inner surface.

[0047] Fig. 20 This is an explanatory diagram of a case where a first structure consisting of triangular recessed portions is formed on the exposed inner surface.

[0048] Fig.21 This is an explanatory diagram of a case where a first structure consisting of a groove along a spiral shape is formed on the outer surface of the needle tip portion.

[0049] Fig. 22 This is an explanatory diagram of another case where the first structure consisting of a groove along a spiral shape is formed on the outer surface of the needle tip portion.

[0050] Fig.23 This is an explanatory diagram of a case where a plurality of grooves along the circumferential direction of the body portion are arranged at equal intervals in the axial direction to constitute the first structure 4 .

[0051] Fig.24 It is a side view of the puncture needle of the third embodiment. DETAILED DESCRIPTION

[0052] A puncture needle according to an embodiment of the present disclosure will be described based on the drawings.

[0053] (First Embodiment)

[0054] Figure 1 The puncture needle 100 of this embodiment is shown in FIG. Figure 1 This is a perspective view of the side surface of the main body 1 viewed from the distal end side of the puncture needle 100 in an inclined direction with respect to the axis G of the main body 1 .

[0055] The puncture needle 100 comprises: a rod-shaped main body 1; a first ultrasonic reflection structure 4 formed on the main body 1; and a second ultrasonic reflection structure 5 formed on the main body 1 and arranged at a position closer to the base end side of the main body 1 in the axial direction (along the axis G of the main body 1) than the first ultrasonic reflection structure 4.

[0056] The second ultrasonic wave reflecting structure 5 is disposed axially apart from the first ultrasonic wave reflecting structure 4. The first ultrasonic wave reflecting structure 4 and the second ultrasonic wave reflecting structure 5 will be described later.

[0057] The main body 1 has: a rod-shaped trunk 2; and a needle tip 3, which is arranged at the front end of the trunk 2. In the present embodiment, the axis of the trunk 2 overlaps with the axis G of the main body 1, and the axial direction of the trunk 2 is the same as the axial direction of the main body 1. Similarly, the circumferential direction of the main body 1 (the circumferential direction centered on the axial direction) is the same as the circumferential direction of the trunk 2. In the present embodiment, the needle tip 3 is the front end of the trunk 2. In the following, there is a case where the axial direction of the main body 1 and the direction identical thereto are simply referred to as the axial direction. In addition, there is a case where the circumferential direction of the main body 1 and the direction identical thereto are simply referred to as the circumferential direction.

[0058] The main body 1 can be formed of, for example, metal alloys such as stainless steel, titanium alloy, cobalt-chromium alloy, fluororesin such as polytetrafluoroethylene, and resin such as nylon. The main body 1 can be solid or cylindrical with a space continuously formed along the axis G inside the main body 1.

[0059] The trunk portion 2 is, for example, rod-shaped or cylindrical. The trunk portion 2 may be solid or hollow (eg, tubular). In the present embodiment, the following description will be given by taking the case where the trunk portion 2 is hollow as an example.

[0060] The needle tip 3 is arranged at the front end of the body 2 as described above. The needle tip 3 is, for example, a cone shape. An example of a cone shape is a circular cone shape, a polygonal pyramid shape including a plurality of flat portions on the side surface. An example of a polygonal pyramid shape is a triangular pyramid shape, a quadrangular pyramid shape, and a pyramid shape with five or more sides. Figure 1 In the figure, the needle tip portion 3 is illustrated as a triangular pyramid. That is, the needle tip portion 3 in this embodiment has three flat portions 31 on its side surface. In the axial direction of the main body 1, the body portion 2 closest to the front end side than the base end on the base end side among the base end portions of each flat portion 31 is the needle tip portion 3.

[0061] The needle tip portion 3 in a polygonal pyramid shape such as a triangular pyramid shape can be formed, for example, by cutting or grinding the tip of a rod-shaped raw material that becomes the main body 1 to form a flat portion that becomes a polygonal pyramid flat surface portion 31. The corner portion of the side surface of the needle tip portion 3, that is, the boundary portion between the adjacent flat surfaces 31, 31 in the shape of a polygonal pyramid (in this embodiment, a triangular pyramid) becomes a blade portion 3A extending from the vertex T (the tip of the puncture needle 100) toward the side surface portion of the main body 1.

[0062] The first ultrasonic wave reflecting structure 4 (hereinafter referred to as the first structure 4) is a structure that reflects ultrasonic waves W (see Figure 3 ) A three-dimensional ultrasonic wave reflecting structure that changes the direction and intensity of reflection. The reflection of the ultrasonic wave W in the first structure 4 will be described later.

[0063] The first structure 4 is disposed at the needle tip portion 3. The first structure 4 is preferably disposed at the front end portion of the needle tip portion 3 as described below.

[0064] The first structure 4 is preferably disposed in a predetermined area on the surface of at least one flat surface portion 31 of the needle tip portion 3. This improves the echo visibility of the needle tip portion 3. The improved echo visibility of the needle tip portion 3 improves the accuracy of puncture during surgical operation.

[0065] The first structure 4 may be disposed on the entire planar portion 31 or on a portion of the entire planar portion 31. The needle tip portion 3 includes the planar portion 31 on which the first structure 4 is disposed and the planar portion 31 on which the first structure 4 is not disposed, so that the circumferential orientation (relative to the body surface, i.e., the orientation of the probe of the echo device) of the main body 1 (puncture needle 100) can be grasped under echo (with the aid of image diagnosis of the echo device).

[0066] like Figure 2 As shown, when the needle tip portion 3 is observed from the side of the main body 1 (in a top view along the radial direction of the main body 1), the plane portion 31 includes: a triangular area located on the front end side; and an elliptical or radial area located closer to the base end side than the triangular area and partially missing. Figure 1 , Figure 2 Points located at the boundary between the triangular region and the partially missing elliptical or radial region in the outer peripheral shape of the plane portion 31 are shown as boundary points P and P.

[0067] In particular, it is preferred to configure the first structure 4 at the front end portion (i.e., the front end portion of the needle tip portion 3) in the plane portion 31. As a result, the echo visibility of the front end portion of the needle tip portion 3 is improved. The echo visibility of the front end portion of the needle tip portion 3 is improved, so that the accuracy of puncture in the surgical operation is further improved. Specifically, the first structure 4 is preferably configured at a position closer to the front end side than the line connecting the boundary points P and P. In addition, the first structure 4 may also extend from a position closer to the front end side than the line connecting the boundary points P and P to a position closer to the base end side than the line connecting the boundary points P and P.

[0068] In addition, the first structure 4 is preferably formed to avoid the vicinity of the blade 3A in the flat surface portion 31. This can maintain the sharpness of the blade 3A of the puncture needle 100 during puncture, thereby ensuring good puncture performance.

[0069] The first structure 4 has a three-dimensional shape, such as Figure 3 As shown, the region where the planar portion 31 without the first structure 4 is formed can reflect a reflected wave W2 with a certain intensity in a direction different from the direction in which the reflected wave W1 of the ultrasonic wave W incident from the probe (not shown) of the echo device is reflected with maximum intensity.

[0070] As an example, the first structure 4 can reflect the reflected wave W2 in the direction along the incident direction of the ultrasonic wave W with a stronger intensity than the reflected wave of the incident ultrasonic wave W, that is, the reflected wave W3 reflected from the area along the incident direction of the ultrasonic wave W where the planar portion 31 of the first structure 4 is not formed.

[0071] That is, by configuring the first structure 4 on the plane portion 31, Figure 3 As shown, when a surgical operation such as puncture is performed while observing through echo from the base end side (the surface side of the body through which the puncture needle 100 is punctured) of the puncture needle 100 (main body 1) (i.e., under echo), the echo visibility of the needle tip 3 is improved, thereby enabling the position of the needle tip to be accurately grasped through the echo, thereby improving the accuracy of puncture in the surgical operation.

[0072] The first structure 4 may have a three-dimensional shape such as a concave-convex shape as a change in the ultrasonic wave W (see Figure 3 ) The direction and intensity of reflection. The concavoconvex shape is, for example, a shape formed by combining depressions, recesses, grooves, etc. A specific example of the first structure 4 is a groove shape (for example, see Figure 4 ). The method or processing method for forming the first structure 4 is not limited, and laser processing, cutting, rolling, punching, etc. can be used. When the first structure 4 is set to a groove shape, for example, the groove width can be set to 30 μm or more and 100 μm or less (as an example, 65 μm).

[0073] Figure 4 , a case where a plurality of (in this embodiment, three) transverse grooves 41 formed in a direction perpendicular to the axis G are formed on the plane portion 31 as the first structure 4. The transverse grooves 41 are arranged, for example, at equal intervals along the axial direction. The length of each transverse groove 41 in a direction intersecting the axis G is longer than the length of the transverse groove 41 located at the base end side on the front end side. By forming the transverse grooves 41 in a direction perpendicular to the axis G, when a surgical operation such as puncture is performed while observing from the base end side of the puncture needle 100 by echo, the ultrasonic wave irradiated with the echo from the body surface side of the living body punctured by the puncture needle 100 is reflected to the body surface side with a strong intensity, so that the echo visibility is improved, thereby being able to accurately grasp the position of the needle tip by the echo.

[0074] Another modification of the first structure 4 is a cross groove shape (see Figure 5 ), multiple small concave shapes (such as dimples, notches, see Figure 6 , Figure 7 ), rough surface formed by sand blasting, etc.

[0075] like Figure 5 As shown, the first structure 4 can also be formed by a plurality of intersecting grooves 42 that intersect each other. Figure 5In the example shown, each intersecting groove 42 intersects with respect to the axial direction. Each intersecting groove 42 may intersect with one or more other intersecting grooves 42 to form a lattice shape.

[0076] like Figure 6 As shown, a plurality of recessed depressions, that is, circular recessed portions 43, may be provided to form the first structure 4. Figure 6 In the illustrated example, the first structure 4 is formed by arranging the circular recesses 43 in a triangular staggered grid pattern.

[0077] like Figure 7 As shown in FIG. 1 , as an example of a notch-shaped depression, a plurality of triangular recesses 44 may be arranged to form the first structure 4. Figure 7 In the illustrated example, the first structure 4 is formed by arranging the triangular recesses 44 in a triangular staggered lattice pattern.

[0078] like Figure 1 As shown, the second ultrasonic wave reflecting structure 5 (hereinafter referred to as the second structure 5) is a structure for reflecting the ultrasonic wave W (refer to Figure 8 ) A three-dimensional ultrasonic wave reflecting structure that changes the direction and intensity of reflection. The reflection of the ultrasonic wave W in the second structure 5 will be described later.

[0079] The second structure 5 can be arranged on the trunk 2. The second structure 5 is formed on the radially outer surface (outer peripheral surface) of the trunk 2, that is, the outer surface 20. The second structure 5 is preferably arranged to be separated from the first structure 4 by a predetermined distance in the axial direction. As a result, the positional relationship between the first structure 4 and the second structure 5 can be easily grasped under the echo, the echo visibility of the puncture needle 100 can be ensured, and the puncture length can be grasped. The distance between the first structure 4 and the second structure 5 is preferably greater than the distance that allows the first structure 4 and the second structure 5 to be observed separately on the echo (for example, greater than 0.6 mm).

[0080] The axial extension length of the second structure 5 (the distance from the front end to the base end in the axial direction of the second structure 5) can also be longer than the separation distance L2 between the first structure 4 and the second structure 5. As a result, the echo visibility of the second structure 5 is improved. The echo visibility of the second structure 5 is improved, so that the position of the trunk 2 can be accurately grasped, and the accuracy of puncture in the surgical operation is further improved. In addition, under the echo, there is a case where the recognition of the first structure 4 and the second structure 5 is improved.

[0081] The second structure 5 may include a plurality of ultrasonic wave reflecting structures (hereinafter referred to as reflecting structure parts 50) separated in the axial direction. Figure 1, the second structure 5 includes: a first reflection structure portion 50a (an example of a reflection structure portion), which is a reflection structure portion 50 disposed on the front end side; and a second reflection structure portion 50b, which is a reflection structure portion 50 disposed at a position closer to the base end side than the first reflection structure portion 50a and adjacent to the first reflection structure portion 50a. Although not shown, the second structure 5 may also include other reflection structure portions 50 in addition to the first reflection structure portion 50a and the second reflection structure portion 50b. That is, the second structure 5 may include more than three reflection structure portions 50.

[0082] The reflective structure 50 adjacent to the first structure 4 in the axial direction is preferably arranged to be separated from the first structure 4 by a predetermined distance in the axial direction. Thus, under the echo, the positional relationship between the first structure 4 and the reflective structure 50 can be easily grasped, the echo visibility of the puncture needle 100 can be ensured, and the puncture length can be appropriately grasped. Thus, the accuracy of puncture in the surgical operation is improved.

[0083] The axial extension length L1 of the reflective structure 50 may also be longer than the separation distance L2 between the first structure 4 and the reflective structure 50. Thus, the echo visibility of the reflective structure 50 is improved. In addition, under the echo, there is a case where the recognition of the first structure 4 and the reflective structure 50 is improved. Thus, the accuracy of puncture in the surgical operation is improved. The extension length L1 is preferably 5 mm or more and 10 mm or less, for example, but is not limited thereto.

[0084] The axially adjacent reflective structures 50 are preferably arranged to be separated from the adjacent reflective structures 50 by a predetermined distance. Thus, under the echo, the positional relationship between the adjacent reflective structures 50 can be easily grasped, the echo visibility of the puncture needle 100 can be ensured, and the puncture length can be appropriately grasped. Thus, the accuracy of puncture in the surgical operation is improved.

[0085] The axial extension length L1 of the reflective structure 50 may be longer than the separation distance L3 between adjacent reflective structures 50. This may improve the echo visibility of each reflective structure 50 and the recognition from the adjacent reflective structure 50. This improves the accuracy of puncture in surgical operation.

[0086] The reflective structure 50 may be formed in a ring shape along the circumference of the outer surface 20 of the trunk 2, or may be formed in a portion along the circumference. When the reflective structure 50 is formed in a ring shape along the circumference of the outer surface 20 of the trunk 2, it is preferred that the circumferential orientation of the main body 1 (puncture needle 100) can be visually confirmed by the echo device even if the circumferential orientation of the main body 1 (puncture needle 100) is in any orientation. When the reflective structure 50 is formed in a portion along the circumferential orientation of the outer surface 20 of the trunk 2, it is possible to grasp the circumferential orientation of the main body 1 (puncture needle 100). This improves the accuracy of puncture during surgical operations.

[0087] The reflective structure 50 has a three-dimensional shape, such as Figure 8 As shown, the outer surface 20 of the trunk 2 where the second structure 5 is not formed can reflect a reflected wave W6 with a certain degree of intensity in a direction different from the direction in which the reflected wave W4 of the ultrasonic wave W incident from the probe of the echo device (not shown) is reflected with maximum intensity.

[0088] As an example, the reflecting structure portion 50 is capable of reflecting a reflected wave W6 in a direction along the incident direction of the ultrasonic wave W with an intensity stronger than the reflected wave of the incident ultrasonic wave W, that is, the reflected wave W5 reflected in a direction along the incident direction of the ultrasonic wave W from the outer surface 20 of the trunk 2 where the first structure 4 is not formed.

[0089] That is, by configuring the second structure 5 (reflection structure 50) on the outer surface 20 of the trunk 2, as shown in FIG. Figure 8 As shown, when a surgical operation such as puncture is performed while observing through echo from the base end side (the surface side of the body through which the puncture needle 100 is punctured) of the puncture needle 100 (main body 1) (i.e., under echo), the echo visibility is improved, thereby enabling the position of the trunk 2 to be accurately grasped through the echo, thereby improving the accuracy of puncture in the surgical operation.

[0090] In addition, Figure 8 Although the first reflective structure 50a is illustrated as an example of the reflective structure 50, the same is true for the second reflective structure 50b. That is, by understanding the positional relationship between each reflective structure 50 (second structure 5) and the first structure 4, the puncture length can be understood.

[0091] The reflective structure 50 may have a three-dimensional shape such as a concave-convex shape as a shape to change the ultrasonic wave W (see Figure 8) The direction and intensity of reflection. The concavo-convex shape is, for example, a shape formed by combining a concave, a depression, a groove, etc. The method or processing method for forming the reflective structure 50 is not limited, and laser processing, cutting, rolling, stamping, etc. can be used. From the perspective of processability, the second structure 5 is preferably in a groove shape. The groove-shaped pattern of the reflective structure 50 can take various shapes. In the case where the reflective structure 50 is set to a groove shape, for example, the groove width can be set to be greater than 20μm and less than 100μm (as an example, 40μm).

[0092] Fig. 9 The figure shows a case where a spiral groove 51 extending along the circumference of the trunk 2 and in the axial direction is formed as the reflective structure 50. The spiral groove 51 is formed to go around the outer surface 20 of the trunk 2 for more than two times along the circumferential direction. When the spiral groove 51 is formed on the trunk 2 as the reflective structure 50, the surface portion where the groove is not formed along the spiral groove 51 is formed on the outer surface 20 of the trunk 2, so that when an external force crossing the axial direction is applied to the trunk 2, the trunk 2 may not be easily bent. When the reflective structure 50 is set as the spiral groove 51, for example, the pitch can be set to be greater than 20 μm and less than 1,000 μm (as an example, 100 μm).

[0093] As other modified examples in the case where the reflective structure 50 has a groove shape, the following modified examples can be exemplified.

[0094] For example, an annular groove 52 that goes around the circumference of the trunk portion 2 (one circle, see Fig.10 ) and the case where a plurality of annular grooves 52 are arranged adjacent to each other in the axial direction (refer to Fig.11 ).exist Fig.10 In the case of , each annular groove 52 is a different reflective structure 50. Fig.11 In the case of , a reflective structure 50 is formed by a plurality of annular grooves 52 .

[0095] In addition, there can be cited a dotted circular groove 53 formed along the circumferential direction and having at least one interruption in the annular shape (see Fig.12 ) and the case where a plurality of the dotted circular grooves 53 are arranged adjacent to each other in the axial direction (not shown). Fig.12 In the case of , each dotted circular groove 53 is a different reflective structure 50 .

[0096] In addition, an annular oblique groove 54 (see Fig.13 ) and the case where a plurality of the annular oblique grooves 54 are arranged adjacent to each other in the axial direction (not shown). Fig.13 In this case, each annular oblique groove 54 is a different reflective structure part 50.

[0097] For example, in the case of two circular arc arranged grooves 55 formed by arranging a plurality of circular arc shaped small grooves 55a in parallel in the circumferential direction adjacent to each other in the axial direction (see Fig.14 ) etc. Fig.14 In the case of , two arc-arranged grooves 55 constitute a reflective structure 50 .

[0098] In addition to the groove shape, the reflective structure 50 may be formed by a plurality of small recessed shapes, a rough surface formed by sandblasting, or the like, similarly to the first structure 4 .

[0099] (Second Embodiment)

[0100] In the first embodiment, the case where the needle tip 3 is in a cone shape is described. The second embodiment is different in that the needle tip 3 has a blade face 6 formed with a blade face 60 intersecting the axis G, and the other parts are the same. The following description will focus on the points different from the first embodiment, and the description of the parts common to the first embodiment will be appropriately omitted.

[0101] Fig.15 , Fig.16 4 shows the needle tip portion 3 of the puncture needle 100 of the present embodiment in a side view (diametrical view). Fig.15 This is a side view of the needle tip portion 3 as viewed from the blade surface 60 side of the blade surface portion 6 .

[0102] Fig.16 This is a side view of the needle tip 3 viewed from the side opposite to the blade surface 60 of the blade surface 6. In this embodiment, the trunk 2 on the distal side of the base end of the blade surface 60 in the axial direction of the main body 1 is the needle tip 3.

[0103] like Fig.15 As shown, the blade face 6 has a first blade face 61, a second blade face 62, and a third blade face 63 as the blade face 60. The third blade face 63 is a face arranged on the base end side of the first blade face 61 or the second blade face 62. In the present embodiment, it is arranged on the base end side of the first blade face 61 and the second blade face 62. Fig.15 In the embodiment, the puncture needle 100 is exemplified as a so-called lancet type. An opening 69 is formed on the blade surface 60 to connect the internal space of the body 2 with the external space. In the puncture needle 100 of this embodiment, a part of the inner surface 29, which is the surface inside the cylinder of the body 2, is exposed to the outside through the opening 69. Hereinafter, the surface of the inner surface 29 closer to the front end side than the base end of the opening 69 in the axial direction of the main body 1 is referred to as an exposed inner surface 29a.

[0104] The first blade surface 61 and the second blade surface 62 are surfaces arranged at a position closer to the front end side than the third blade surface 63. The first blade surface 61 is arranged on the right side when the front end side is observed from the third blade surface 63, and the second blade surface 62 is arranged on the left side when the front end side is observed from the third blade surface 63. The first blade surface 61 and the second blade surface 62 are in the same position in the direction along the axis G. The first blade surface 61 and the second blade surface 62 are respectively inclined toward the outside of the tube relative to the third blade surface 63. That is, the first blade surface 61 is inclined to the right. In addition, the second blade surface 62 is inclined to the left. The ends of the first blade surface 61 and the second blade surface 62 on the radial outside of the main body 1 become the blade 6A extending from the vertex T toward the side portion of the main body 1.

[0105] The first structure 4 can be arranged, for example, on the blade surface 60, the exposed inner surface 29a, or the outer surface 30 of the needle tip 3 in the trunk 2 (the portion of the outer surface 20 located at the needle tip 3). More specifically, the first structure 4 can be arranged on only one, only two, or all of the blade surface 60, the exposed inner surface 29a, or the outer surface 30. The first structure 4 does not need to be formed on the entire surface of the blade surface 60, the exposed inner surface 29a, or the outer surface 30, but only on a portion. The first structure 4 is preferably arranged at the front end of the needle tip 3, as in the first embodiment. Thereby, the echo visibility of the front end of the needle tip 3 is improved. It is further preferred as follows Fig.15 In this way, in the side view of the needle tip 3 observed from the blade surface 60 side of the blade face 6, the first structure 4 is arranged at a position closer to the front end side than the center Q of the opening 69 in the axial direction. As a result, the echo visibility of the front end of the needle tip 3 is improved. The echo visibility of the front end of the needle tip 3 is improved, so that the accuracy of puncture in the surgical operation is further improved. In addition, the first structure 4 can also extend from a position closer to the front end side than the center Q to a position closer to the base end side than the center Q.

[0106] The first structure 4 can be formed in a groove shape, a dimple shape, or a rough surface formed by sandblasting, similarly to the case of the first embodiment.

[0107] Fig.17 The figure shows a plurality of V-shaped portions (in Fig.17 (three in the figure) The case where the V-shaped grooves 71 constitute the first structure 4. The plurality of V-shaped grooves 71 are arranged at equal intervals in the axial direction, for example.

[0108] Fig.18 2 shows a case where a plurality of dimple-shaped depressions, that is, circular recesses 72 are formed on the exposed inner surface 29a to constitute the first structure 4. The circular recesses 72 may be arranged in a triangular staggered lattice pattern, for example.

[0109] Fig.192 shows a case where a plurality of grooves 73 are formed along the circumferential direction of the trunk 2 from the inner end of the first blade surface 61 (the radial inner end of the trunk 2) through the exposed inner surface 29a to the inner end of the second blade surface 62 to constitute the first structure 4. The plurality of grooves 73 are arranged, for example, at equal intervals along the axial direction. In this example, the first structure 4 is arranged at a position closer to the front end side than the center Q. In addition, the groove 73 as the first structure 4 is formed to avoid the vicinity of the blade 6A. As a result, the sharpness of the blade 6A during puncture in the puncture needle 100 can be maintained, ensuring good puncture performance.

[0110] Fig. 20 2 shows a case where a triangular recess 74 of an isosceles triangle having one vertex at the front end and a base along the circumferential direction is formed on the exposed inner surface 29a as the first structure 4. In this example, the first structure 4 is arranged at a position closer to the front end than the center Q.

[0111] Figure 21 to Figure 23 2 shows a case where the first structure 4 is formed on the outer surface 30 . Fig.21 , Fig. 22 FIG. 4 shows a case where the first structure 4 is formed by forming spiral grooves 75 and 76 extending in the axial direction on the outer surface 30 along the circumferential direction of the trunk portion 2. FIG. 4 shows a case where the first structure 4 is formed by forming spiral grooves 75 and 76 extending in the axial direction on the outer surface 30. Fig. 22 The slot 76 shown is Fig.21 The grooves 75 shown have a large pitch (large intervals along the axial direction). Fig.23 2 shows a case where a plurality of grooves 77 are arranged along the circumference of the trunk portion 2 at equal intervals in the axial direction to constitute the first structure 4. Fig.23 In the example shown, the groove 77 is formed to avoid the vicinity of the blade 6A. The grooves 75, 76, and 77 can have a groove width of, for example, 20 μm to 100 μm (40 μm as an example). In addition, when a plurality of grooves 75, 76, and 77 are formed, the pitch can be set to 50 μm to 300 μm (100 μm as an example).

[0112] (Third Embodiment)

[0113] In the first embodiment, the needle tip 3 is a cone shape, particularly a triangular pyramid shape. The third embodiment is different in that the needle tip 3 is a cone shape, and the other parts are the same. Hereinafter, the description will be centered on the points different from the first embodiment, and the description of the parts common to the first embodiment will be appropriately omitted.

[0114] Fig.24 A side view of the puncture needle 100 of this embodiment is shown in FIG. Fig.24As shown, the needle tip 3 of the puncture needle 100 of this embodiment is conical. A first structure 4 is formed at the front end of the needle tip 3. The first structure 4 can be formed by, for example, arranging annular grooves 49 adjacent to each other in the axial direction.

[0115] exist Fig.24 In the illustrated example, the second structure 5 has a plurality of reflective structure portions 50 formed of one annular groove 52 arranged at equal intervals in the axial direction.

[0116] As described above, it is possible to provide a puncture needle that can ensure the echo visibility of the puncture needle and can grasp the puncture length.

[0117] In addition, the structure disclosed in the above-mentioned embodiment (including other embodiments, the same below) can be applied in combination with the structure disclosed in other embodiments as long as no contradiction occurs. In addition, the embodiments disclosed in this specification are illustrative, and the embodiments of the present disclosure are not limited to this and can be appropriately changed within the scope of the purpose of the present disclosure.

[0118] Industrial Applicability

[0119] The present disclosure can be applied to a puncture needle.

[0120] Description of Reference Numerals

[0121] 1…main body; 100…puncture needle; 2…trunk; 20…outer surface (outer peripheral surface); 29…inner surface; 29a…exposed inner surface; 3…needle tip; 30…outer surface; 31…flat surface; 3A…blade; 4…first structure (first ultrasonic wave reflection structure); 41…transverse groove; 42…cross groove; 49…annular groove; 5…second structure (second ultrasonic wave reflection structure); 50…reflection structure; 50a…first reflection structure; 50b…second reflection structure; 51…spiral groove; 52…annular groove; 53…dashed circular groove; 54…annular oblique groove; 54a…oblique groove; 55…arc-arranged grooves; 55a…groove; 6…blade face; 60…blade face; 61…first blade face; 62…second blade face; 63…third blade face; 69…opening; 6A…blade; 71…V-groove; 72…circular recess; 73…groove; 74…triangular recess; 75…groove; 76…groove; 77…groove; G…axis; L1…extension length; L2…separation distance; L3…separation distance; P…boundary point; Q…center; T…vertex; W…ultrasonic wave; W1…reflected wave; W2…reflected wave; W3…reflected wave; W4…reflected wave; W5…reflected wave; W6…reflected wave.

Claims

1. A puncture needle, characterized in that: have: A rod-shaped main body; A first ultrasonic wave reflecting structure formed on the main body; and a second ultrasonic wave reflecting structure formed in the main body and arranged closer to the proximal end side of the main body in the axial direction than the first ultrasonic wave reflecting structure; The second ultrasonic wave reflecting structure and the first ultrasonic wave reflecting structure are arranged to be separated from each other in the axial direction.

2. The puncture needle according to claim 1, characterized in that: The main body has a rod-shaped body and a needle tip disposed at the front end of the body. The first ultrasonic wave reflecting structure is arranged at the needle tip. The second ultrasonic wave reflecting structure is arranged on the trunk portion.

3. The puncture needle according to claim 2, characterized in that: The first ultrasonic wave reflecting structure is arranged at a distal end portion of the needle tip portion.

4. The puncture needle according to claim 2 or 3, characterized in that: The second ultrasonic wave reflecting structure is a spiral groove formed on the outer peripheral surface of the body portion.

5. The puncture needle according to any one of claims 2 to 4, characterized in that: The needle tip is in a cone shape.

6. The puncture needle according to any one of claims 2 to 5, characterized in that: The trunk is formed into a cylindrical shape, The needle tip portion has an opening portion that connects the inner space of the body portion to the outer space.

Images