Ovum collection needle hub

Abstract

To provide technique capable of easily recognizing the angle of a blade surface by the sense of touch of a hub and improving the operability of an ovum collecting needle.SOLUTION: There is provided an ovum-collecting needle hub (2) to which a hollow needle (3) having a blade surface (3a) is connected, the ovum-collecting needle hub (2) including: an indicator portion (22) that indicates the direction of the blade surface (3a); gripping portions (32a to 32d) that can come into contact with fingers when gripped; and non-gripping portions (28a to 28d) that are set to be closer to a needle shaft than the gripping portions, wherein the indicator portion (22) includes a fin-shaped protruding portion (22) that protrudes from an outer surface to an outer peripheral side and extends in a longitudinal direction, the fin-shaped protruding portion (22) forms an end portion farthest from the needle shaft in a cross-sectional view of any location in the longitudinal direction, and the gripping portions (32a to 32d) and the non-gripping portions (28a to 28d) are disposed in the longitudinal direction in parallel with the protruding portion (22).SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a hub for an egg collection needle used for aspirating and collecting eggs from a living body's ovarian follicles. [Background technology]

[0002] In vitro fertilization (IVF) has been performed as a part of assisted reproductive technology (ART), but the success or failure of IVF depends on how to obtain mature eggs from the follicles. Currently, the transvaginal method using an ultrasound device is widely used because the puncture distance is short, the skin is not damaged, and local anesthesia is effective.

[0003] It is known that an egg collection needle has a hollow needle with a blade surface at the tip, generally a length of more than 30 cm, and a hub that holds the hollow needle, and the outer surface of the hub has a shape with a depression in the center (see, for example, Patent Document 1).

[0004] In the egg collection procedure using an egg collection needle, the ovaries in the living body are identified with an ultrasound device, the tip of the hollow needle is inserted into the follicle, and the eggs are collected into the egg collection needle. In this procedure, fine adjustments such as changing the direction and rotating the hub are made, and the procedure is repeated as many times as necessary to collect multiple eggs. After collection is complete, the hollow needle is removed from the follicle, and the procedure ends. In this egg collection procedure using an egg collection needle, the resistance given to the egg collection needle by the living tissue is small, making it easy to operate the egg collection needle and allowing eggs to be easily collected transvaginally.

[0005] In the above-mentioned procedure, when operating the egg collection needle, the practitioner performs the procedure while watching the monitor of the ultrasound device, and it is necessary to adjust the angle of the blade surface without directly viewing the hollow needle. For this reason, the practitioner needs to recognize the state of the blade surface angle, etc. by relying on the touch of the hub to which the hollow needle is fixed. However, it cannot be said that this function is fully utilized in the hub of the conventional egg collection needle.

[0006] In addition, in conventional egg collection needles, the hub is formed into a shape that is easy to operate by resin molding, and the hub is made thick overall or partially. In this case, during resin molding, there is a risk that a small area where the hollow needle is glued and fixed inside the hub is not filled with resin, and the hollow needle is not firmly fixed to the hub. This can cause inconveniences such as positional deviation or angle deviation between the hollow needle and the hub, or make it difficult for the practitioner to transmit force to the needle during the procedure. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-023488 A Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been invented in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a technique that can solve at least one of the above problems and improve the operability of an egg collection needle. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention employs the following configuration. is an egg collection needle hub to which a hollow needle having a blade surface is connected, the egg collection needle hub having an outer diameter enlarging portion at the tip side whose distance from the needle axis increases toward the tip, and an indicator portion which indicates the orientation of the blade surface, the indicator portion including a protruding portion protruding from the outer surface toward the outer periphery, the protruding portion also protruding toward the outer periphery in the outer shape of a projection view seen from the tip side.

[0010] In this case, the egg collection needle hub has an outer shape expansion part at the tip side, the distance from the needle axis increasing toward the tip. This structure allows the practitioner to apply a strong force to the front of the hollow needle while gripping the egg collection needle hub. The indicator part includes a protruding part protruding from the outer surface to the outer periphery, and the protruding part also protrudes to the outer periphery in the outer shape of the projection view seen from the tip side. In other words, the protruding part protrudes further to the outer periphery than the maximum diameter part of the outer shape expansion part. This also allows the practitioner to rotate the egg collection needle hub around the needle axis while gripping it, thereby tactilely sensing the indicator part including the protruding part, and more reliably recognizing the direction of the blade surface. As a result, it is possible to improve the operability of the egg collection needle.

[0011] In the present invention, the hollow needle has an insertion hole at the center, A plurality of recesses are formed around the needle shaft, A depth of the recess in a direction toward the needle shaft may be greater than a distance from a bottom surface of the recess to the insertion hole in the direction toward the needle shaft.

[0012] This allows the depth of the recess in the direction toward the center of the egg collection needle hub to be sufficiently deep, and prevents minute spaces from being generated in the portion inside the egg collection needle hub where the hollow needle is to be bonded and fixed during resin molding of the egg collection needle hub. Note that, for example, the recess may be formed by providing a lattice-like structure on the outer surface of the hub, which is made up of a plurality of ribs extending in the longitudinal direction and a plurality of flanges extending in the circumferential direction.

[0013] In the present invention, a plurality of the recesses may be formed in the longitudinal direction, which makes it possible to prevent minute spaces from being generated in the portion where the hollow needle is to be adhesively fixed, over a larger area in the longitudinal direction of the egg collection needle hub.

[0014] In addition, in the present invention, A pair of ribs protruding outward from the outside are formed in directions 180 degrees apart from each other, The present invention may be characterized in that end ribs are formed on the outer peripheral ends of the pair of ribs, extending perpendicularly to each of the ribs.

[0015] According to this, multiple ribs extending in the longitudinal direction are formed around the needle axis of the egg collection needle hub, and for a pair of ribs formed in directions that differ by 180 degrees, end ribs are formed at the outer peripheral ends thereof that extend perpendicularly to each rib. According to this, in the egg collection needle hub formed with multiple ribs, a surface that can be gripped by the practitioner can be provided on the outer surface of the rib, making it possible to easily grip the egg collection needle hub. As a result, it is possible to further improve the operability of the egg collection needle.

[0016] In this case, the outer peripheral surface of the end rib may be curved in an arc shape having a central axis parallel to the needle shaft. This makes it easier for the practitioner to grip the egg collection needle hub and rotate the egg collection needle hub around the needle shaft. As a result, it is possible to further improve the operability of the egg collection needle.

[0017] The present invention also provides an egg collection needle hub to which a hollow needle is connected, the hub having an enlarged outer diameter portion at the tip end, the distance from the needle axis increasing toward the tip end, an insertion hole through which the hollow needle is inserted, This egg collection needle hub is characterized in that a plurality of recesses are formed around the needle axis and / or in the longitudinal direction, and the depth of each of the recesses in the direction toward the needle axis is greater than the distance from the bottom surface of each recess to the insertion hole in the direction toward the needle axis.

[0018] This allows the depth of the recess toward the center of the egg collection needle hub to be sufficiently deep, which prevents minute spaces from being generated in the area where the hollow needle is to be bonded and fixed during molding of the egg collection needle hub, and reduces the possibility of problems such as misalignment or angle deviation between the hollow needle and the hub occurring during the practitioner's procedure.

[0019] The present invention also provides an egg collection needle hub to which a hollow needle having a blade surface is connected, the egg collection needle hub comprising: an indicator portion that indicates the orientation of the blade surface; a gripping portion that can come into contact with a finger when gripping; and a non-grip portion that is set at a shorter distance from the needle shaft than the gripping portion, the indicator portion including a fin-shaped protruding portion that protrudes from the outer surface toward the outer periphery and extends in the longitudinal direction, the fin-shaped protruding portion forming an end portion furthest from the needle shaft in a cross-sectional view at any point in the longitudinal direction, and the gripping portion and non-grip portion being arranged in parallel to the protruding portion in the longitudinal direction.

[0020] That is, in the present invention, the egg collection needle hub includes an indicator portion that indicates the direction of the blade surface of the hollow needle, a grip portion that can be contacted with a finger when gripping, and a non-grip portion that is set to be closer to the needle shaft than the grip portion. More specifically, the indicator portion of the egg collection needle hub includes a fin-shaped protruding portion that protrudes from the outer surface of the hub to the outer periphery and extends in the longitudinal direction. This protruding portion forms the end portion furthest from the needle shaft in a cross-sectional view at any location in the longitudinal direction. That is, in a cross-sectional view at any location, the protruding portion is the portion that protrudes most outward. The grip portion and the non-grip portion are also arranged in the longitudinal direction parallel to the protruding portion.

[0021] According to this, the practitioner can feel the indicator part consisting of the protruding part by touching it by rotating the egg collection needle hub around the needle axis while gripping it, and can more reliably recognize the direction of the blade surface of the hollow needle. As a result, it is possible to improve the operability of the egg collection needle. In addition, in the present invention, a gripping part that can be touched by the fingers when gripping and a non-gripping part are arranged in the longitudinal direction in parallel with the protruding part. Therefore, when the practitioner grips the egg collection needle hub, the tactile sensation of the protruding part can be more clearly felt, and the indicator part can be more clearly sensed by touch.

[0022] The present invention is also a method for manufacturing an egg collection needle hub, which has a recess on its outer surface at the tip end with a depth that is at least one-quarter of the diameter of the hub when viewed in cross section perpendicular to the axis, and a cylindrical portion at the base end, in which the egg collection needle hub is molded using a first molding die which is a set of molding dies that mold the outer shape of the egg collection needle hub and has a mold with a shape complementary to the recess and that can be moved in a direction perpendicular to the axial direction, which is the longitudinal direction of the egg collection needle hub, and a second molding die that can be moved in the longitudinal direction of the egg collection needle hub and molds the inner shape of the base end of the egg collection needle hub.

[0023] According to this, a recess is formed on the tip side by the first mold, and an egg collection needle hub can be manufactured in which the generation of a microspace in the part where the needle is to be fixed by adhesive is suppressed. In addition, the cylindrical part is formed on the base end side by the second mold, so that the thick-walled area is reduced, and the phenomenon of molding with air bubbles trapped inside is unlikely to occur. Therefore, it is possible to reduce the possibility of inconveniences such as positional deviation or angle deviation occurring between the hollow needle and the hub during the procedure by the practitioner.

[0024] In the present invention, the above-mentioned means for solving the problems are combined as much as possible. can be used. Effect of the Invention

[0025] According to the present invention, it is possible to improve the operability of the egg collection needle. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of an egg collection needle in Example 1 of the present invention. [Diagram 2] FIG. 2 is a perspective view of an egg collection needle hub in the first embodiment of the present invention. [Diagram 3] FIG. 2 is a four-view diagram of the egg collection needle hub in the first embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of the egg collection needle hub in Example 1 of the present invention. [Diagram 5] FIG. 2 is a four-view diagram of the egg collection needle hub in the first embodiment of the present invention. [Figure 6] FIG. 11 is a three-view diagram of an egg collection needle hub in Example 2 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] EXAMPLES Hereinafter, examples of the present invention will be described. The examples shown below are examples of the mode of carrying out the present invention, and the technical scope of the present invention is not limited to the following aspects.

[0028] <Example 1> FIG. 1 shows an egg collection needle 1 to which the present invention is applied. The egg collection needle 1 is an instrument for collecting eggs from follicles. The egg collection needle 1 includes a hollow needle 3 having a blade surface 3a at the tip, an egg collection needle hub 2 (hereinafter, simply referred to as a hub) through which the hollow needle 3 penetrates and is fixed, a tube member 4 for an aspiration line connected to the base end of the hollow needle 3, and a test tube cap 5 fixed to the tube member 4 with the base end of the tube member 4 penetrating. The base end of the tube member 4 penetrating the test tube cap 5 is flared to have a tapered shape with an expanded diameter. In addition to the tube member 4, a suction pipe member 6 is penetrating and fixed to the test tube cap 5. An aspirator connection part 7 is connected to the end of the suction pipe member 6 opposite to the test tube cap 5. This aspirator connection part 7 is a port that can be connected to the tip part of a syringe, which is a suction device.

[0029] The hollow needle 3 has an inner cavity penetrating from the tip to the base end, and a blade surface 3a for inserting into an ovarian follicle is formed at the tip. In this embodiment, the blade surface 3a is a flat surface formed by cutting the hollow needle 3 obliquely, but the shape of the blade surface 3a may be any shape. The hub 2 is adhesively fixed to the base end of the hollow needle 3 as described above. The hub 2 has a substantially cylindrical shape, and is provided at the center as viewed from the axial direction with a needle shaft hole 20a (described later) as an insertion hole through which the hollow needle 3 penetrates or is inserted. The hollow needle extends from the base end of the hub to the base end side, but the base end of the hub can also be a connector.

[0030] In this embodiment, the base end of the hollow needle 3 penetrates the needle shaft hole 20a of the hub 2 and protrudes from the base end of the hub 2. The hollow needle 3 and the tube member 4 are joined in a state in which the protruding base end of the hollow needle 3 is press-fitted into the tube member 4. A protector 8 for protecting the hollow needle 3 is detachably attached to a small-diameter, approximately cylindrical tip protrusion 20 provided at the tip of the hub 2.

[0031] Next, a method of using the egg collection needle 1 in this embodiment will be described. When using the egg collection needle 1, the test tube cap 5 is attached to a test tube (not shown). Then, the hollow needle 3 is inserted into a living body, the ovaries are confirmed by an ultrasound device, and the tip of the hollow needle 3 is inserted into an ovarian follicle. Then, by pulling the plunger of a syringe (not shown) connected to the aspirator connection part 7, the egg is aspirated into the hollow needle 3, passed through the tube member 4, and collected in a test tube. This procedure is repeated the required number of times to collect multiple eggs. Then, after collection is completed, the hollow needle 3 is removed from the follicle, and the procedure is completed. Note that the subject connected to the aspirator connection part 7 is The suction device is not limited to a syringe, but may be an aspirator using an electric pump.

[0032] Next, the hub 2 will be described with reference to Figs. 2 and 3. Fig. 2 is a perspective view of the hub 2. Fig. 3 is a four-sided view of the hub 2. In Fig. 3, Fig. 3(a) is a top view of the hub 2, Fig. 3(b) is a front view, Fig. 3(c) is a side view seen from the tip side, and Fig. 3(d) is a side view seen from the base side. The basic side surface 21 as the outer surface of the hub 2 has a roughly cylindrical shape as described above. Here, the basic side surface 21 as the outer surface indicates the side of the basic shape of the hub 2 excluding additional protrusions such as a protrusion (described later) and a flange (described later). More specifically, the basic side surface 21 forms a gradually decreasing diameter portion from the base end side, which is the opposite side of the tip protrusion 20, toward the center, and forms an outer shape expanding portion where the basic side surface 21 gradually expands in diameter from the center toward the tip side. That is, strictly speaking, the hub 2 has a drum-like shape with a smaller diameter at the center compared to both ends.

[0033] This shape is for making it easier for the practitioner to grasp the hub 2 and push and pull it back and forth when inserting or removing the hollow needle 3 into or from a follicle. In this embodiment, the basic side surface 21 is defined as described above, but in cases where the basic side surface 21 is not geometrically apparent, such as the tip side of the hub 2 in Fig. 3, the basic side surface 21 may be defined by assuming that the basic side surface 21 measured at the base end side of the hub 2 is disposed symmetrically from the tip side. Alternatively, the amount of protrusion of the flanges 32d to 32f from the basic side surface 21 at the base end side of the hub 2 may be defined by a virtual line connecting points drawn from the outermost circumference of the flanges 32a to 32d.

[0034] 2 and 3, a fin-shaped protrusion 22 is provided on the upper side of the basic side surface 21, extending in the longitudinal direction over the entire area from the tip side to the base side of the basic side surface 21. The protrusion amount H of the protrusion 22 toward the outer periphery is a value in the range of 0.5 mm to 2 mm with respect to the basic side surface 21, as shown in FIG. 3. The protrusion amount H of the protrusion 22 does not need to be in the range of 0.5 mm to 2 mm over the entire area in the longitudinal direction of the hub 2. For example, in this embodiment, the protrusion amount from the outermost periphery of the flanges 32a to 32f may be 0.5 mm or less. The circumferential position of the protrusion 22 on the hub 2 is the same as the blade surface 3a of the hollow needle 3. This can be said in other words that the angular positions of the protrusion 22 and the blade surface 3a around the needle axis are the same.

[0035] That is, the practitioner grasps the hub 2 and confirms the position of the protrusion 22 by touching it with his / her fingertips, and is thereby able to recognize the position of the blade surface 3a of the hollow needle 3 without directly looking at the hollow needle 3. The protrusion 22 constitutes an indicator in this embodiment. The outer shape of FIG. 3(c) corresponds to the outer shape of the projection as viewed from the tip side in this embodiment. FIG. 3(c) shows that the protrusion 22 protrudes to the outer periphery in the outer shape of the projection as viewed from the tip side. The protrusion amount of the protrusion may be (1) the distance from the radial base end to the tip of the protrusion in the outer shape of the projection as viewed from the tip side of the egg collection needle hub. Or (2) the distance between the part corresponding to the radial base end of the protrusion and the tip of the protrusion on the side (basic side) of the basic shape excluding additional protrusions from the outer surface of the egg collection needle hub. Or (3) the distance between the part corresponding to the radial base end of the protrusion and the tip of the protrusion on the side shape including additional protrusions (ribs, flanges, etc.) on the outer surface of the egg collection needle hub.

[0036] The protrusion may have a radial distance from the base end to the tip of the protrusion of 0.5 mm or more in a cross-sectional view of any location in the longitudinal direction of the egg collection needle hub. For example, in the standard (3), the protrusion amount from the apex of the flange 32 may be less than 0.5 mm, while the protrusion amount from the tip or base end of the flange 32 in the needle axial direction may be 0.5 mm or more. When the protrusion includes a portion with a protrusion amount of 0.5 mm or more, it is possible to make it easier for the practitioner to recognize the angle of the egg collection needle hub by touch when gripping the egg collection needle hub, compared to when the protrusion does not include a portion. In addition, if the protrusion amount of the protrusion is too large, it is considered that the protrusion is likely to come into contact with the patient's skin during operations such as rotation. Therefore, it is preferable that the protrusion amount of the protrusion is less than 2.0 mm, and it is more preferable that the protrusion amount of the protrusion is 2.0 mm or less in the entire area.

[0037] A plurality of annular flanges 32a to 32f extending in the circumferential direction are formed on the base side surface 21 so as to be arranged at approximately equal intervals in the longitudinal direction. In this embodiment, the amount of protrusion of the flanges 32a to 32f from the base side surface 21 is about 0.3 mm, but is not particularly limited.

[0038] In addition, upper left recesses 28a-28d and upper right recesses 29a-29d, each having a substantially rectangular opening, are provided on the basic side surface 21 so as to sandwich the protruding portion 22 in the circumferential direction and to be aligned in the longitudinal direction. The base end of the upper left recess 28a and the upper right recess 29a and the tip and base end of the upper left recesses 28b-28d and the upper right recesses 29b-29d are defined by flanges 32a-32d. The recesses are formed in the circumferential direction and the longitudinal direction from the longitudinal middle to the tip of the basic side surface 21, and are formed in a portion that is easily gripped by the practitioner during the pushing operation or the rotating operation.

[0039] In this embodiment, the upper left recesses 28a-28d and the upper right recesses 29a-29d constitute non-gripping parts that are unlikely to come into contact with the fingers of the practitioner when gripping the hub 2. In contrast, the flanges 32a-32d and the basic side surface 21, which are parts that can come into contact with the fingers of the practitioner, form gripping parts. In the embodiment of FIG. 3(b), the non-gripping parts are set to be 2-4 mm shorter from the needle axis than the adjacent flanges (gripping parts). It is preferable that the non-gripping parts are set to be 1.5 mm or more shorter from the needle axis than the gripping parts. In addition, when the length of the non-gripping parts in the needle axis direction is 1, it is preferable that the depth of the non-gripping parts from the outer surface of the adjacent gripping parts is 0.3 or more.

[0040] The gripping portion and the non-gripping portion are the parts that the practitioner senses by touch in comparison with the protruding portion, and therefore, it is desirable that they are arranged at least in a range of ±90° from the protruding portion as viewed from the longitudinal direction of the egg collection needle. More preferably, they are arranged adjacent to the protruding portion. Furthermore, it is desirable that the gripping portion and the non-gripping portion are arranged in the longitudinal direction of the egg collection needle hub so as to be lined up near the protruding portion. Although it is not essential that the gripping portion and the non-gripping portion are arranged in the longitudinal direction in parallel with the protruding portion, it is preferable that they are provided because, when the practitioner grasps the egg collection needle hub, the entire area of ​​the fingers are unlikely to come into contact, which enhances the tactile sensation when touching the protruding portion and makes it easier to sense the indicator portion by touch more clearly.

[0041] 4 is a cross-sectional view taken along the line AA in FIG. A hollow needle fixing part 35 having a substantially cylindrical shape is formed so as to surround the hole 20a. A fin-shaped protrusion 22 is provided from the hollow needle fixing part 35 toward the upper side in FIG. 4. A lower rib 25a is formed toward the lower side in FIG. 4 on the opposite side of the protrusion 22 in the hollow needle fixing part 35. A left rib 23a and a right rib 24a are formed in the left-right direction in FIG. 4 on the hollow needle fixing part 35. A left vertical rib 26a and a right vertical rib 27a are formed perpendicular to the left rib 23a and the right rib 24a at the outer peripheral ends of the left rib 23a and the right rib 24a, respectively. In this way, a plurality of ribs are formed around the needle axis in the cross section of the hub 2, protruding toward the outer peripheral side and extending in the longitudinal direction. Among them, the protrusion 22 can be said to be the rib with the largest protruding amount.

[0042] The outer peripheral surfaces of the left vertical rib 26a and the right vertical rib 27a have an arc shape and form part of the basic side surface 21. The left vertical rib 26a and the right vertical rib 27a correspond to the end ribs in this embodiment. The cross-sectional view taken along the line AA in FIG. 4 shows the hub in this embodiment. 4 corresponds to a cross-sectional view of the protrusion 22. In addition, in FIG. 4, the protrusion 22 can be said to form the end portion farthest from the needle shaft. The amount of protrusion H from the outer periphery of the cross section A-1 is shown in FIG. Not only in the cross-sectional view at A, but also in any cross-sectional view (transverse cross-sectional view) at any position in the longitudinal direction of the hub 2 , projection 22 forms the end furthest from the needle shaft.

[0043] The lower rib 25a, the left rib 23a, the right rib 24a, the left vertical rib 26a, and the right vertical rib 27a are separated at their base end by a flange 32a (not shown in FIG. 4). Although not shown in FIG. 4, the lower rib 25b, the left rib 23b, the right rib 24b, the left vertical rib 26b, and the right vertical rib 27b are formed on the extension lines of the lower rib 25a, the left rib 23a, the right rib 24a, the left vertical rib 26a, and the right vertical rib 27a toward the base end. The lower rib 25c, the left rib 23c, the right rib 24c, the left vertical rib 26c, and the right vertical rib 27c are formed on the extension lines of the lower rib 25a, the left rib 23a, the right rib 24a, the left vertical rib 26a, and the right vertical rib 27a toward the base end. Furthermore, a lower rib 25d, a left rib 23d, a right rib 24d, a left vertical rib 26d, and a right vertical rib 27d are formed, which are separated by flanges 32c and 32d. The flanges are not limited to annular protrusions, and may be fan-shaped. Also, the flanges may be eliminated to make the outer surface flush so that it is smooth.

[0044] As can be seen from Fig. 4, the upper left recess 28a is defined in the circumferential direction by the protrusion 22, the left rib 23a, and the left vertical rib 26a. The radial side surface of the hollow needle fixing portion 35 forms the radial bottom surface of the upper left recess 28a. Similarly, the upper right recess 29a is defined in the circumferential direction by the protrusion 22, the right rib 24a, and the right vertical rib 27a. The radial side surface of the hollow needle fixing portion 35 forms the radial bottom surface of the upper right recess 29a.

[0045] The above-mentioned configuration features are the same for the left lower recess 30a and the right lower recess 31a, but a repeated explanation will be omitted here. The same is also true for each recess formed on the base end side of the hub 2.

[0046] Next, the radial depth of each recess will be described using the upper left recess 28a as an example. The radial depth of the upper left recess 28a is determined by the distance D1 between the base side surface 21 and the outer circumferential surface (side surface) of the hollow needle fixing part 35. The depth D1 of the upper left recess 28a is determined by the distance D1 between the base side surface 21 and the outer circumferential surface (side surface) of the hollow needle fixing part 35. It is set to be larger than the distance D2 of the inner peripheral surface. This allows the radial depth of the upper left recess 28a to be sufficiently deep. In other words, when the outer diameter of the basic side surface 21 of the hub 2 is set to a value equivalent to that of the conventional one, the distance D2 between the outer peripheral surface and the inner peripheral surface of the hollow needle fixing part 35 can be sufficiently short. As a result, during resin molding of the hub 2, it is possible to suppress the occurrence of sink marks in the resin and areas not filled with resin, particularly around the needle shaft hole 20a, and it is possible to improve the shape accuracy of the needle shaft hole 20a. As a result, it is possible to more reliably adhesively fix the hollow needle 3 to the hub 2.

[0047] Fig. 5, like Fig. 3, shows four-sided views of the hub 2. The top view of Fig. 5(a) shows the positions of the left ribs 23a-23d and the right ribs 24a-24d, while the front view of Fig. 5(b) shows the positions of the left vertical ribs 26a-26d and the lower ribs 25a-25d.

[0048] According to this embodiment, a fin-shaped protrusion 22 is provided on the hub 2, and the circumferential position of the protrusion 22 on the hub 2 is set to the same position as the blade surface 3a of the hollow needle 3. This makes it possible for the practitioner to grasp the hub 2 and confirm the position of the protrusion 22 by touch with his / her fingertips, thereby recognizing the position of the blade surface 3a without directly looking at the hollow needle 3.

[0049] In addition, by providing the upper left recesses 28a-28d, the upper right recesses 29a-29d, the lower left recesses 30a-30d, and the lower right recesses 31a-31d and making their radial depths sufficiently deep, the thickness of the resin of the hollow needle fixing part 35 can be reduced, and in particular, the occurrence of sink marks in the resin around the needle shaft hole 20a or areas not filled with resin, resulting in the formation of minute spaces, can be suppressed. As a result, the hollow needle 3 can be reliably bonded and fixed to the hub 2, improving the quality of the egg collection needle 1. It becomes possible to do so.

[0050] As shown in FIG. 3(d) and FIG. 5(d), the hub 2 has a plurality of hollow portions 28e to 31e extending in the longitudinal direction from the base end of the hub 2 toward the tip end when viewed from the base end side.

[0051] These hollow portions are formed to extend in the longitudinal direction from the base end of the hub 2 toward the tip end side without overlapping with the areas where the upper left recesses 28a-28d, the upper right recesses 29a-29d, the lower left recesses 30a-30d, and the lower right recesses 31a-31d are formed. In the example of Fig. 3(d) and Fig. 5(d), upper left hollow portion 28e, upper right hollow portion 29e, lower left hollow portion 30e, and lower right hollow portion 31e are formed, which are separated by the protrusion 22 and the left hollow rib 23e, the right hollow rib 24e, and the lower hollow rib 25e, which are formed by extending the left ribs 23a-23d, the right ribs 24a-24d, and the lower ribs 25a-25d toward the base end side, respectively.

[0052] The hub 2 in this embodiment is formed by resin molding using a first mold, which is a set of molds that can move in the vertical direction of the hub 2 and mold the outer shape of the hub 2 with recesses formed from the vertical direction, and a second mold that can move in the front-rear direction of the hub 2 and molds the upper left hollow 28e, upper right hollow 29e, lower left hollow 30e, and lower right hollow 31e of the hub 2, which are spaces between the insertion hole and the hub outer shape. The outer shape of the tip side of the hub 2 formed by the first mold includes the basic side surface 21, flanges 32a to 32f, protrusion 22, upper left recesses 28a to 28d, upper right recesses 29a to 29d, lower left recesses 30a to 30d, and lower right recesses 31a to 31d. The recesses form a thin wall part on the tip side of the hub 2. The base end side of the hub 2 has a hollow portion formed therein by the second mold, and a cylindrical thin-walled portion is formed with an inner diameter larger than the insertion hole and an inner surface that defines the hollow portion. Therefore, the hub 2 has few areas that are thick overall, and it is difficult for the hub to be molded with air bubbles trapped inside. This reduces the possibility of inconveniences such as misalignment or angle misalignment between the hollow needle and the hub during the practitioner's procedure.

[0053] <Example 2> In Example 1, an example was described in which the amount of protrusion of the protrusion 22 is approximately uniform over the entire longitudinal area of ​​the hub 2. In Example 2, an example is described in which the amount of protrusion of the protrusion varies depending on the location in the longitudinal direction of the hub 2.

[0054] FIG. 6 is a three-view diagram of the hub 2a in this embodiment. FIG. 6(a) is a top view of the hub 2a, FIG. 6(b) is a front view of the hub 2a, and FIG. 6(c) is a side view of the hub 2a seen from the tip side. In this embodiment, a protrusion 33 constituting an indicator part is provided instead of the protrusion 22 in the first embodiment. The protrusion 33 protrudes largely outward only at the tip side of the hub 2a, and the fin-shaped protrusion is formed at a position closer to the tip side. The protrusion 33 protrudes most at the top of the upper left recess 28a and the upper right recess 29a on the tip side of the hub 2a, and the protrusion amount H from the basic side surface 21 to the outer periphery at this location is in the range of 0.5 mm to 2 mm.

[0055] The amount of protrusion decreases toward the base end in the longitudinal direction of hub 2a, and the amount of protrusion from basic side surface 21 is substantially zero above upper left recess 28c and upper right recess 29c. In the region where upper left recess 28a and upper right recess 29a are formed on the tip side of hub 2a, even in this embodiment, multiple ribs that protrude to the outer periphery and extend in the longitudinal direction are formed around the needle shaft, and among the multiple ribs, protrusion 33 has the largest protrusion amount.

[0056] In addition, the outer shape of FIG. 6(c) corresponds to the outer shape of a projection as seen from the tip side in this embodiment. In FIG. 6(c), the protrusion 33 is located on the outer circumferential side in the outer shape of the projection as seen from the tip side. In this embodiment, in a cross-sectional view of the region where the upper left recess 28a and the upper right recess 29a of the hub 2a are formed, the protrusion 33 forms the end portion farthest from the needle shaft.

[0057] As mentioned above, in the actual egg collection procedure, the hollow needle 3 is often pushed forward and inserted into the follicle. Therefore, if the protrusion 33 at a portion of the tip side of the hub 2 is made to protrude a large amount, the practitioner can adequately recognize the direction of the blade surface 3a of the hollow needle 3 by touch when necessary, and egg cells can be collected sufficiently efficiently.

[0058] In the above embodiment, one protrusion is provided, but two protrusions may be provided in parallel, and the axial position between them may coincide with the direction of the blade surface. The axial position of the protrusion may be opposite to the direction of the blade surface. The protrusion has a higher indicator function for the practitioner when located at the tip side of the hub, but may be formed only at the base end side of the hub to reduce unevenness at the tip side. The shape of the protrusion is not limited to a protrusion extending in the axial direction, and may be, for example, a protrusion that protrudes in the axial direction and partially protrudes in the outer shape. In addition, a protruding protrusion such as a flange or rib is not essential to form a recess, and the periphery of a recess having a predetermined depth may be made flush and smooth. The predetermined depth may be a depth in the direction toward the needle axis that is greater than the distance from the bottom surface of the recess to the insertion hole in the direction toward the needle axis, or a depth that is equal to or greater than one-fourth the diameter of the hub in the cross section in the axial direction. The recess may be formed on the base end side of the hub. In the above embodiment, an example has been described in which the shape of the hub is generally cylindrical, but the shape of the hub is not limited to a generally cylindrical shape. It may be a generally polygonal prism shape or a generally elliptical prism shape. In addition, in cases where the basic side surface does not appear in the outer shape of the hub, for example, when the outer shape of the hub is formed only by a rib and a flange, the basic side surface may be defined by a virtual line connecting the outermost circumference of the rib or flange. In this case, the protrusion amount of the protrusion is defined as the distance from the outermost circumference of the rib or flange.

[0059] The present invention also provides an egg collection needle hub to which a hollow needle having a blade surface is connected, The tip side has an outer diameter expanding portion whose distance from the needle axis increases toward the tip, A plurality of ribs are formed around the needle shaft, protruding outward and extending in the longitudinal direction. An indicator portion that indicates the orientation of the blade surface, The indicator portion may be a rib that protrudes the most out of the plurality of ribs.

[0060] In this case, the egg collection needle hub has multiple ribs that protrude outward and extend in the longitudinal direction around the needle shaft. The indicator part is the rib that protrudes the most among the multiple ribs. This also allows the practitioner to feel the indicator part consisting of the protruding part by touch by rotating the egg collection needle hub around the needle shaft while gripping it, and to more reliably recognize the direction of the blade surface. As a result, the operability of the egg collection needle can be improved.

[0061] In the present invention, the amount of protrusion from the outer surface to the outer periphery may include a portion that is 0.5 mm or more. This makes it easier for a practitioner to recognize the angle of the egg collection needle hub by touch when gripping the egg collection needle hub. The amount of protrusion may be (1) the distance from the base end to the tip of the protrusion in the radial direction in the outer shape of the egg collection needle hub when viewed from the tip side. Alternatively, (2) the distance between the part corresponding to the base end of the protrusion in the radial direction and the tip of the protrusion on the side (basic side) of the basic shape excluding additional protrusions from the outer surface of the egg collection needle hub. Alternatively, (3) the distance between the part corresponding to the base end of the protrusion in the radial direction and the tip of the protrusion on the side shape including additional protrusions (ribs, flanges, etc.) on the outer surface of the egg collection needle hub. [Explanation of symbols]

[0062] 1. Egg collection needle 2···Egg collection needle hub 3...Hollow needle 3a...Blade surface 4. Tube member 5. Test tube cap 6. Suction pipe member 7. Aspirator connection part 20....Tip convex part 20a···Needle shaft hole 21...Basic aspects 22, 33...Protrusion 23a~23d... Left rib 23e Left hollow rib 24a~24d...Right rib 24e...Right hollow rib 25a~25d Lower rib 25e Lower hollow rib 26a~26d...Left vertical rib 27a~27d...Right vertical rib 28a~28d: Upper left recess 28e...upper left hollow part 29a~29d: Upper right concave 29e...Upper right hollow part 30a~30d: Lower left recess 30e...Bottom left hollow part 31a~31d: Lower right recess 31e...Bottom right hollow part 32a~32f...Flanges

Claims

1. An egg collection needle hub to which a hollow needle having a blade surface is connected, The tip side has an outer diameter expanding portion whose distance from the needle axis increases toward the tip, An indicator portion that indicates the orientation of the blade surface, an egg collection needle hub, wherein the indicator portion includes a protruding portion protruding from an outer surface toward the outer periphery, the protruding portion also protruding toward the outer periphery in a projected outline viewed from the tip side.

2. The hollow needle has a through hole at the center, A plurality of recesses are formed around the needle shaft, The egg collection needle hub according to claim 1 , wherein a depth of the recess in a direction toward the needle axis is greater than a distance from a bottom surface of the recess to the insertion hole in a direction toward the needle axis.

3. The egg collection needle hub according to claim 2 , wherein a plurality of the recesses are formed in the longitudinal direction.

4. A pair of ribs protruding outward from the outer periphery and formed in directions 180 degrees apart from each other, 4. The egg collection needle hub according to claim 1, wherein an end rib is formed on the outer peripheral end of each of the pair of ribs, the end rib extending perpendicularly to each of the ribs.

5. An egg collection needle hub to which a hollow needle is connected, The tip side has an outer diameter expanding portion whose distance from the needle axis increases toward the tip, The hollow needle has an insertion hole through which the hollow needle is inserted, A plurality of recesses are formed around the needle shaft and / or in the longitudinal direction, an egg collection needle hub, wherein a depth of the recess in a direction toward the needle axis is greater than a distance from a bottom surface of the recess to the insertion hole in a direction toward the needle axis.

6. An egg collection needle hub to which a hollow needle having a blade surface is connected, An indicator portion that indicates the orientation of the blade surface; A gripping portion that can be touched by a finger when gripping the needle, and a non-gripping portion that is set to be closer to the needle axis than the gripping portion; Equipped with The indicator portion includes a fin-shaped protrusion that protrudes from an outer surface toward the outer periphery and extends in a longitudinal direction, The fin-shaped protrusion forms an end portion farthest from the needle shaft in a cross-sectional view at any point in the longitudinal direction, the gripping portion and the non-gripping portion are arranged in parallel with the protruding portion in the longitudinal direction.

7. A method for manufacturing an egg collection needle hub having a recess on the outer surface at the tip end side, the recess having a depth of at least one-fourth of the diameter of the hub in a cross-sectional view perpendicular to the axis, and a cylindrical portion on the base end side, A first mold is a set of molds that can move in a direction perpendicular to the axial direction, which is the longitudinal direction of the egg collection needle hub, and has a shape complementary to the recess, and molds the outer shape of the egg collection needle hub; a second molding die that is movable in the longitudinal direction of the egg collection needle hub and that molds the inner shape of the base end of the egg collection needle hub.

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