JP2018023632A - Indwelling needle assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indwelling needle assembly that can improve stability of a posture in needling.SOLUTION: An indwelling needle assembly includes: an inner needle having a sharp needle tip in the distal end; a hollow outer needle with the inner needle inserted therein; an outer needle hub body having an inner hole with an inner needle inserted therein and mounted with the outer needle in an opening of the distal side; an outer needle hub having a tube mounting part provided in the peripheral surface of the outer needle hub body and mounted with a tube; and an inner needle hub provided at a proximal end side of the inner needle protruding from the outer needle hub, and provided in a relatively displacing manner to the outer needle hub. The inner needle hub has the inner needle hub body where the inner needle is mounted in the distal end, and a wing part provided in the inner needle hub body and projected into the distal side from the inner needle hub body. The wing part has a plate-like gripping portion positioned at the distal side of the wing part and having a gripping surface on both sides. The gripping portion is positioned in the vicinity of the outer needle hub body. The outer needle hub body has a non-slip part in the outer circumferential surface of the outer needle hub body. The non-slip part is positioned in the vicinity of the gripping portion.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an indwelling needle assembly that is punctured and placed in a blood vessel during artificial dialysis, infusion, or blood collection.

  When a practitioner performs artificial dialysis, infusion, blood collection, or the like on a patient, a sealed indwelling needle is used. As an indwelling needle assembly, there exists a thing like patent document 1, for example. In the indwelling needle assembly of Patent Document 1, an extension tube is connected to the side of the catheter hub, and the needle hub has a wing portion. The treatment worker punctures the patient's body with the indwelling needle assembly after gripping the wings.

JP2013-233247A

  In the indwelling needle assembly of Patent Document 1, the treatment worker holds the grip portion of the wing portion between the thumb and the index finger, and punctures the tip of the indwelling needle assembly into the blood vessel of the patient. However, if only the wing is gripped, the outer needle hub moves due to the weight of the extension tube, so the posture of the indwelling needle assembly is not stable. In order to stabilize, it can be considered that the outer needle hub is grasped with a hand opposite to the hand grasping the grasping portion and punctured. In that case, the posture of the indwelling needle assembly itself is stabilized, but both hands must be used for stabilization. Therefore, the patient's skin cannot be pressed by hand, and the position and posture of the indwelling needle assembly with respect to the patient's skin are likely to be shaken. Therefore, the puncturing operation is not stable.

  Accordingly, an object of the present invention is to provide an indwelling needle assembly that can improve the stability of posture during puncturing.

  The indwelling needle assembly of the present invention has an inner needle having a sharp needle tip at a distal end, a hollow outer needle through which the inner needle is inserted, and an inner hole through which the inner needle is inserted. And an outer needle hub main body to which the outer needle is attached to the distal opening, and an outer needle hub provided on a side of the outer needle hub main body and to which a tube is attached. An inner needle hub that is provided on the proximal end side of the inner needle protruding from the needle hub and that is displaceable relative to the outer needle hub. An inner needle hub main body attached to the distal end, and a wing provided on the inner needle hub main body and extending from the inner needle hub main body to the distal side. It has a plate-like gripping part located on the distal side of the wing part and having gripping surfaces on both sides, Located in the vicinity of the outer needle hub, the outer needle hub includes a stop portion sliding on the outer peripheral surface of the outer needle hub, the non-slip unit are those located in the vicinity of the grip portion.

  According to the present invention, since the grip portion is disposed in the vicinity of the outer needle hub main body, when the grip portion is gripped, the outer needle hub main body can be stably gripped by a part of the gripped finger. In addition, by placing the anti-slip portion of the outer needle hub in the vicinity of the grip portion, the outer needle hub can be gripped by a part of the finger while the part of the gripped finger is in contact with the anti-slip portion. Can do. As a result, it is possible to suppress a part of the finger from being displaced on the outer needle hub when gripped, and it is possible to suppress blurring of the indwelling needle assembly. That is, the posture stability during puncture can be improved.

  According to the present invention, posture stability during puncture can be increased.

It is a top view which shows the indwelling needle assembly of 1st Embodiment of this invention. FIG. 2 is a cross-sectional view of the indwelling needle assembly of FIG. 1 cut along a virtual cross section including the axis thereof and parallel to the paper surface. It is the right view which looked at the indwelling needle assembly of FIG. 1 from the right side. It is sectional drawing which cut | disconnected the indwelling needle assembly of FIG. 1 and cut | disconnected by cutting line IV-IV. It is a perspective sectional view of the indwelling needle assembly of FIG. It is sectional drawing which shows the indwelling needle assembly of 2nd Embodiment of this invention.

  Hereinafter, sealed indwelling needles 1 and 1A, which are examples of indwelling needle assemblies according to first and second embodiments of the present invention, will be described with reference to the drawings. In addition, the concept of the direction used in the following description is used for convenience in description, and does not limit the direction of the configuration of the invention in that direction. Moreover, the sealed indwelling needles 1 and 1A described below are only one embodiment of the present invention. Therefore, the present invention is not limited to the embodiments, and additions, deletions, and changes can be made without departing from the spirit of the invention.

[First Embodiment]
A sealed indwelling needle 1 according to the first embodiment shown in FIG. 1 is used when a needle is punctured and placed in a blood vessel or the like, and a drug solution is administered into the blood vessel by the needle or blood is collected from the blood vessel. It is done. The sealed indwelling needle 1 includes an indwelling needle main body 2, a tube 3, and a connector 4. In the following description, the distal portion is a distal portion with respect to a practitioner performing a needle puncturing operation on a patient with the sealed indwelling needle 1, and the proximal portion of the practitioner is a proximal end portion. It is called. That is, the distal side is the distal end side and the proximal side is the proximal end side.

  The indwelling needle main body 2 includes an outer needle hub 11, an outer needle 12, an inner needle 13, and an inner needle hub 14. The outer needle hub 11 is a Y-shaped member made of synthetic resin, has a main body portion 21, and has a tube attachment portion 22 on the peripheral surface of the main body portion 21. The main body portion 21, which is an example of the outer needle hub main body, is formed in a substantially cylindrical shape, and is formed in a tapered shape that tapers as the outer peripheral surface of the front end portion approaches the front end. As shown in FIG. 2, the main body portion 21 has an inner hole 21a that passes through the main body portion 21 along the axis L1. A hemostatic rubber 5 is fitted into the axial direction intermediate region of the inner hole 21a, and the inner hole 21a is divided into a distal end side space 21b and a proximal end side space 21c by the hemostatic rubber 5. The hemostatic rubber 5 is a solid substantially cylindrical member made of a synthetic rubber such as polyisoprene or a thermoplastic elastomer, and seals between the spaces 21b and 21c described above. A tube attachment portion 22 is integrally provided on the outer peripheral surface of the intermediate portion of the main body portion 21, and the tube 3 is attached to the tube attachment portion 22.

  The tube attachment portion 22 extends obliquely toward the base end side of the main body portion 21 so as to be separated from the outer peripheral surface (side surface) of the intermediate portion of the main body portion 21 toward one side in the radial direction. That is, the tube attachment portion 22 is located in the middle portion of the outer needle hub 11 and extends from the outer peripheral surface (side surface) of the main body portion 21 to the rear left side. The tube mounting portion 22 is formed in a substantially cylindrical shape and has a communication path 22a that is an inner hole thereof. The communication path 22a extends along the axis of the tube mounting portion 22, one end of which is connected to the distal end side space 21b, and the other end of the tube 3 is inserted into the other end. The tube 3 has flexibility, and a connector 4 is provided at the other end.

  The connector 4 is formed in a Y shape, and has an injection plug 23 and a connection portion 24. A syringe with a needle (not shown) is connected to the injection plug 23. The connection unit 24 can connect an infusion set and a blood collection set (not shown), and is closed by a cap member 25. Thus, in the sealed indwelling needle 1, an infusion set, a blood collection set, a syringe with a needle, and the like can be attached to the connector 4. The attached infusion set, blood collection set, syringe with needle, and the like are connected to the distal end side space 21b of the main body portion 21 through the connector 4 and the tube 3. Further, the outer needle 12 is inserted and fixed in the opening on the distal end side of the main body portion 21.

  The outer needle 12 is a substantially cylindrical thin tube made of a soft synthetic resin having flexibility, such as ethylene-tetrafluoroethylene copolymer, polyurethane, polyether nylon, or polypropylene. The proximal end portion of the outer needle 12 is inserted and fixed in the distal end side opening of the outer needle hub 11. The outer needle 12 has an insertion hole 12a that is an inner hole, and the inner needle 13 is inserted through the insertion hole 12a.

  The inner needle 13 is a generally cylindrical hollow needle made of, for example, a metal material or a hard synthetic resin, and extends straight along the axis L1. The inner needle 13 passes through the inner hole 21 a of the outer needle hub 11 so as to penetrate the hemostatic rubber 5, and a distal end portion and a proximal end portion protrude from the outer needle hub 11. The inner needle 13 has a sharp needle tip 13a formed so as to be able to puncture a blood vessel at the tip, and the inner needle 13 has a blade surface 13b that is cut obliquely with respect to the axis L1 at the needle tip 13a. Have. An inner needle hub 14 is provided at the proximal end portion of the inner needle 13.

  The inner needle hub 14 is formed in a substantially cylindrical shape and is configured to be relatively displaceable with respect to the outer needle hub 11. That is, the inner needle hub 14 can be relatively displaced proximally and pulled away from the outer needle hub 11, and the inner needle 13 can be pulled out of the outer needle 12 by pulling away (two points in FIG. 2). (See chain line). The inner needle hub 14 having such a function includes an inner needle hub body 31 and a wing portion 32.

  The inner needle hub main body 31 is a bottomed cylindrical member configured by closing the proximal end side opening of the substantially cylindrical portion 31a with a cap 31b. The inner needle hub main body 31 has an attachment portion 14a therein, and the proximal end portion of the inner needle 13 is inserted and fixed to the attachment portion 14a. The inner needle 13 protrudes from the distal end portion of the inner needle hub body 31 and extends along the axis L1. The inner needle hub main body 31 configured in this way is disposed on the proximal end side of the main body portion 21 so that the distal end of the inner needle hub main body 31 contacts the proximal end of the main body portion 21. 32 is integrally formed.

  The wing part 32 is a part for the operator to hold with two fingers (for example, the thumb T1 and the index finger T2) at the time of puncture and when the inner needle 13 is pulled out. The wing part 32 is formed in a plate shape thinner than the outer needle hub 11, and is formed in a substantially drop shape when viewed in the thickness direction. The wing portion 32 is integrally provided at the distal end side portion of the outer peripheral surface of the inner needle hub main body 31, and protrudes from the outer peripheral surface to the front diagonal right side. More specifically, the wing portion 32 has a connecting portion 32a and a gripping portion 32b, and is formed in a generally tear shape by these. The connecting portion 32a is formed in a substantially triangular shape in plan view, and the gripping portion 32b is formed in a substantially circular shape in plan view.

  The wing 32 is provided on the outer peripheral surface so that a part of one side of the connecting portion 32a is integrated with the outer peripheral surface of the inner needle hub main body 31, and protrudes to the front end side and the diagonal direction on the other side in the radial direction and the front diagonal right side. It has been. Further, the gripping portion 32 b is provided at the distal end of the connecting portion 32 a and is located on the distal end side of the wing portion 32. As a result, the grip portion 32 b is positioned on the distal end side with respect to the inner needle hub main body 31, and is positioned in the vicinity of the outer needle hub 11. More specifically, the grip portion 32b is disposed on the right side of the intermediate portion of the outer needle hub 11, that is, on the opposite side of the tube 3 (more specifically, the tube attachment portion 22) with the main body portion 21 interposed therebetween.

  The gripping portion 32b rises obliquely upward so as to be separated from the tube 3 when the blade surface 13b of the needle tip 13a of the inner needle 13 is directed upward in the gravity direction. That is, the gripping portion 32b rises to the upper right side when the blade surface 13b of the needle tip 13a of the inner needle 13 is directed upward in the gravity direction. Note that FIG. 2 shows the wings 32 tilted in the left-right direction for convenience of explanation, and the same applies to FIGS. 3 to 6. The grip portion 32b arranged in this manner is close to the outer needle hub 11, and a slight gap (for example, 1.5 mm or less) between the outer needle hub 11 and a gap of about 0.5 mm in this embodiment. It is arranged with a gap. By arranging in this way, it is possible to grip the grip portion 32b and attach two fingers to the middle portion of the outer needle hub 11, and when pulling down the inner needle hub 14, the outer needle hub 11 and the wing portion 32. Can be prevented from becoming a resistance.

  In the sealed indwelling needle 1 configured as described above, the sealed indwelling needle 1 can be firmly held by gripping the grip portion 32b and attaching it to the middle portion of the outer needle hub 11 with two fingers. The stability of the sealed indwelling needle 1 at the time of puncturing can be improved. The grip portion 32b has the following shape so that it can be easily gripped.

  That is, the gripping portion 32b is gripped by the two fingers, and the right diagonal rear portion is the thinnest as shown in FIG. The thickness is increased (see also FIGS. 4 and 5). That is, the grip surfaces 32c and 32d above and below the grip portion 32b (that is, in the thickness direction) are generally the lowest in the right diagonal rear side portion of the outer edge and the highest in the left diagonal front side of the outer edge as shown in FIG. It is formed in a shape. That is, a recess is formed in the gripping surfaces 32c and 32d, so that the belly of the finger can be easily placed. Further, the valley line of the recess extends from the right oblique rear side part of the outer edge to the left oblique front through the center of the grasping part 32b so that the operator places the finger on the grasping part 32b along the valley line. Can be urged.

  Further, as can be seen from FIG. 5 obtained by cutting the grip portion 32b along the valley line, the grip surfaces 32c and 32d of the grip portion 32b are formed in accordance with the shape of the finger tip side. The slope of the left diagonal front side is larger than the slope of the right diagonal rear side. Further, the gripping surfaces 32c and 32d of the gripping portion 32b are inclined toward the outer peripheral surface of the outer needle hub 11 (more specifically, a mounting portion 27 described later). That is, the outer peripheral surface of the outer needle hub 11 is located on or near the extension line of the left oblique front region of the gripping surfaces 32c and 32d (see the two-dot chain line in FIG. 4). As a result, the tip of the finger is naturally arranged on the outer peripheral surface of the outer needle hub 11 when the belly of the finger is placed on the grip portion 32b.

  Furthermore, an annular ridge 33 is formed around the center of the grip portion 32b as shown in FIGS. The ridge 33 is formed so as to protrude from each of the gripping surfaces 32c and 32d, and is prevented from slipping by being caught by a finger (more specifically, the belly of the finger) placed on the gripping portion 32b. The ridge 33 does not necessarily have an annular shape, and a plurality of linear protrusions may be formed at a predetermined interval. The effect in the present application is caused by a non-slip portion, which will be described later, hitting the tip of each finger holding the holding portion 32b during puncturing. Therefore, the anti-slip portion may be formed so as to sandwich the grip portion 32b at the time of puncture (that is, on the outer peripheral surface of the outer needle hub 11 on the one side and the other side in the circumferential direction with respect to the grip portion 32b). Further, even if an annular groove is formed around the center of the gripping portion 32b, the same effect as that of the ridge 33 can be exhibited.

  As described above, the grasping portion 32b having such a shape allows the operator to grasp his / her finger along the valley line, and by placing it in a saddle shape, the finger's belly is placed in the recess. It is easy. In addition, since the slope of the left diagonal front region of the gripping surfaces 32 c and 32 d faces the outer peripheral surface of the outer needle hub 11, it is easy to place the tip of the finger on the intermediate portion of the outer peripheral surface of the outer needle hub 11. . Further, a mounting portion 27 as shown in FIG. 1 is formed in the middle portion of the outer peripheral surface of the outer needle hub 11.

  The placement unit 27 is a part for placing the tip of the operator's finger, that is, the operator's fingertip. The placement portion 27 is located in the vicinity of the grip portion 32b of the wing portion 32, and can easily place the tip portion of a finger that grips the grip surfaces 32c and 32d. Moreover, the mounting part 27 is formed in the unevenness | corrugation, and comprises the anti-slip part which suppresses that the fingertip mounted on it slips | slides. Specifically, the mounting portion 27 is configured by three protruding ridge portions 27a to 27c, and the protruding ridge portions 27a to 27c are arranged on the outer peripheral surface of the main body portion 21 at equal intervals in the front-rear direction. Yes. Further, the ridges 27 a to 27 c are bridged from the upper side of the tube mounting portion 22 to the main body portion 21, further turn around the right half surface of the outer peripheral surface of the main body portion 21, and again below the main body portion 21, the tube mounting portion. 22 is stretched over. As described above, the ridges 27 a to 27 c are formed on the main body portion 21 so as to be bridged between the upper and lower surfaces of the main body portion 21. Further, the top portions of the ridges 27a to 27c are formed flat, and the surgeon's fingertips can be placed thereon. Furthermore, by disposing the ridges 27a to 27c at intervals, it is possible to prevent the fingertip from sliding in the front-rear direction by forming irregularities on the outer peripheral surface of the outer needle hub 11. The configuration of the mounting portion 27 is not limited to the configuration described above, and may be formed by providing a plurality of small dome-shaped protrusions on the outer peripheral surface of the outer needle hub 11, for example.

  In the sealed indwelling needle 1 configured as described above, the wing portion 32 extends from the inner needle hub body 31 to the intermediate portion of the outer needle hub 11 and is adjacent to the intermediate portion. Thereby, when gripping the grip portion 32b, the outer needle hub 11 can be stably gripped by a part of the gripped finger. Further, by placing the mounting portion 27 of the outer needle hub 11 in the vicinity of the gripping portion 32b, the outer needle hub can be used with a part of the finger while the part of the gripped finger is placed on the mounting portion 27. 11 can be gripped. As a result, when the outer needle hub 11 is gripped by being placed on the placement portion 27, it is possible to prevent a part of the finger from shifting on the outer needle hub 11, and the blurring of the sealed indwelling needle 1 can be prevented. Can be suppressed. That is, the posture stability during puncture can be improved.

  Further, the sealed indwelling needle 1 has an extending portion 31c extending proximally from the wing portion 32 of the inner needle hub main body 31 by integrally providing the wing portion 32 at the tip side portion of the inner needle hub main body 31. It has become. The extending portion 31 c has a width substantially the same as the distal end side of the inner needle hub main body 31 and extends integrally in the axial direction along the axial direction, and the length in the axial direction (that is, the extending direction) is the axial direction of the wing portion 32. It is about twice the length. In the present embodiment, the extending portion 31c extends from the placing portion 27 to a position of 40 mm, for example. Further, the length of the extending portion 31c is preferably such that the base end of the extending portion 31c is separated from the placement portion 27 by 20 mm or more and 50 mm or less. If the proximal end of the extending portion 31c is about 40 mm to 50 mm from the placement portion 27, the sealed indwelling needle 1 can be fixed by applying the proximal end of the extending portion 31c to the palm. When the base end of the extending portion 31c is less than 20 mm from the placement portion 27, it is difficult to attach the middle finger to the extending portion 31c. Therefore, the extending portion 31c preferably extends from the placement portion 27 to a position of 20 to 50 mm.

  By configuring the extending portion 31c in the inner needle hub main body 31 in this way, it is possible to apply the belly of fingers (for example, the middle finger T3 and the ring finger T4) that the operator does not hold to the lower side of the outer peripheral surface of the extending portion 31c. . By doing so, the proximal end side portion of the indwelling needle main body 2 can be supported by a finger that is not gripped, and the stability in the vertical direction of the indwelling needle main body 2 at the time of puncturing and withdrawing can be improved. In addition, since the indwelling needle body 2 can be supported by putting the base end of the extending portion 31c on the palm of the hand, even if an object or the like hits the sealed indwelling needle 1 unexpectedly, the needle of the sealed indwelling needle 1 is used. It is possible to suppress the tip 13a from blurring.

  Below, the operation | work at the time of puncturing the sealed indwelling needle 1 and extracting the inner needle 13 from the outer needle 12 is demonstrated. In the sealed indwelling needle 1, as shown in FIG. 1, the proximal end of the outer needle hub 11 is in contact with the distal end of the inner needle hub 14, and the needle tip 13 a of the inner needle 13 protrudes from the distal end of the outer needle 12. Used in. Further, in the sealed indwelling needle 1, the inner needle hub 14 is configured to be rotatable about the axis with respect to the outer needle hub 11, and the wing portion 32 is opposite to the tube mounting portion 22 with the main body portion 21 interposed therebetween. That is, the inner needle hub 14 is rotated so as to be positioned on the right side. By doing so, the blade surface 13b of the needle tip 13a faces upward in plan view. In the sealed indwelling needle 1, the wing portion 32 rises upward and obliquely at 45 degrees to the right as shown in FIG. 1 in a state where the blade surface 13 b of the needle tip 13 a faces upward in the gravity direction. The surgeon holds the wing 32 in this state.

  When gripping, the wing portion 32 is gripped by two fingers, in this embodiment, the belly of the thumb T1 and the index finger T2, and the tip ends of the thumb T1 and the index finger T2 are placed on the placement unit 27 from the upper and lower diagonal sides. Place. Thereby, the intermediate part of the outer needle hub 11 can be gripped by the tip portions of the thumb T1 and the index finger T2, and the left and right blurring of the indwelling needle main body 2 can be suppressed. Further, the middle finger T3 and the ring finger T4 are applied to the lower side of the extending portion 31c to support the inner needle hub 14. Thereby, the shake | fluctuation of the up-down direction of the indwelling needle main body 2 can be suppressed. The surgeon holds the sealed indwelling needle 1 in a state in which the vertical and horizontal blurring is suppressed as described above, that is, in a stable posture, and punctures the patient's blood vessel with the inner needle 13 in that state. In the sealed indwelling needle 1, as described above, when the blade surface 13b of the needle tip 13a is directed upward, the wing portion 32 rises upward and obliquely to 45 degrees to the right. Therefore, it is possible to prevent the lower finger that grasps the grip portion 32b during puncture, in this embodiment, the fingertip of the index finger T2 from hitting a site near the puncture site of the patient.

  After puncturing, the inner needle 13 is removed from the outer needle 12 in order to collect blood or flow the infusion into the blood vessel. When pulling out the inner needle 13, the lower end of the thumb T1 and the index finger T2 is moved away from the mounting portion 27 while supporting the lower side of the extending portion 31c by the middle finger T3 and the ring finger T4, as in puncturing. Only the wing 32 is gripped. On the upper surface of the tube attachment portion 22 in the placement portion 27, a finger opposite to the hand that holds the wing portion 32 is placed, and the outer needle hub 11 is pressed against the patient's skin by the finger. The surgeon moves the hand holding the wing part 32 to the proximal side in the pressed state (see the two-dot chain line in FIG. 2), and pulls the inner needle hub 14 away from the outer needle hub 11. By doing so, after the needle tip 13a of the inner needle 13 is retracted into the outer needle 12, it is further pulled out from the outer needle 12 and the hemostatic rubber 5, and finally from the main body portion 21. Thereby, the inner needle 13 can be separated from the outer needle hub 11.

  As described above, in the sealed indwelling needle 1, the inner needle hub body 31 extends to the proximal side from the wing portion 32. Therefore, the finger is lowered to the extending portion that is extended while holding the holding portion with two fingers. Can be supported from the side. Thereby, since the indwelling needle main body 2 can be supported at two points apart in the front-rear direction, it is possible to suppress vertical movement. That is, it is possible to improve the posture stability during puncture and needle removal.

  Further, in the sealed indwelling needle 1, the length of the extending portion 31c is about twice the length of the wing portion 32 and extends from the anti-slip portion to the position of at least 40 mm on the proximal end side. The two fingers T3 and ring finger T4 are easy to support by being applied to the extending portion 31c. By making it possible to apply a plurality of fingers in this way, posture stability during puncture and needle removal can be further improved.

  In the present embodiment, the length of the extending portion 31c is approximately twice the length of the wing portion 32, but may be three times as long. In consideration of the number of fingers that can be applied, it is preferably at least twice the length of the wing portion 32. Considering that the base end of the extending portion 31c hits the palm when grasped, the wing portion The length is preferably 3 times or less of the length of the portion 32. Accordingly, the length of the extending portion 31c is preferably 2 to 3 times that of the wing portion 32, but the length of the extending portion 31c is not necessarily limited to such a range. In addition, the extending portion 31c does not necessarily extend from the placement portion 27 to a position of 40 mm. For example, if the extending portion 31c extends to a position of 25 mm, at least the middle finger T3 can be applied to the extending portion 31c. . This alone can improve the stability in the vertical direction of the indwelling needle body 2 at the time of puncturing and when the needle is withdrawn.

  Further, in the sealed indwelling needle 1, the mounting portion 27 is formed in the middle portion of the outer peripheral surface of the outer needle hub 11, and the wing portion 32 extends to a position adjacent to the mounting portion 27. As a result, the finger can hold the wing portion 32 and the finger can be placed on the placement portion 27. That is, the hermetic indwelling needle 1 can be supported at three points of the placement part 27 in addition to the wing part 32 and the extension part 31c, and the stability of the posture at the time of puncture can be improved. In addition, since the placement portion 27 on which the finger is placed is formed to be uneven, the displacement of the fingertip can be suppressed.

  Further, in the closed indwelling needle 1, the tube mounting portion 22 protrudes from the outer peripheral surface to one side in the radial direction at the intermediate portion of the outer peripheral surface of the outer needle hub 11, and the ridges 27a to 27c are formed at the intermediate portion. ing. Therefore, since the protruding portion and the protruding portion are gathered in one place, the outer needle hub 11 can be easily formed. In the sealed indwelling needle 1, the ridges 27 a to 27 c are formed so as to extend from the upper side of the tube attachment part 22 to the lower side of the tube attachment part 22 around the right half of the outer peripheral surface of the main body part 21. Yes. Therefore, compared with the case where it forms separately from the upper and lower sides of the tube attachment part 22 and the outer peripheral surface of the main-body part 21, the number of shaping | molding locations can be reduced and shaping | molding of the outer needle hub 11 is easy. Furthermore, the outer needle hub 11 can be easily formed by forming the mounting portion 27 with the convex portions 27a to 27c.

Second Embodiment
The sealed indwelling needle 1A of the second embodiment is similar in configuration to the sealed indwelling needle 1 of the first embodiment. In the following, the configuration of the sealed indwelling needle 1A of the second embodiment will be mainly described with respect to differences from the sealed indwelling needle 1 of the first embodiment, and the same configuration will be shown and described with the same reference numerals. Is omitted.

  As shown in FIG. 7, the sealed indwelling needle 1 </ b> A includes an indwelling needle main body 2 </ b> A, a tube 3, and a connector 4. The indwelling needle main body 2 </ b> A includes a protector 40 in addition to the outer needle hub 11, the outer needle 12, the inner needle 13, and the inner needle hub 14. The protector 40 is partially housed in the outer needle hub 11 on the proximal end side from the hemostatic rubber 5. When the inner needle 13 is pulled out from the outer needle 12 and the outer needle hub 11, the protector 40 covers and protects the needle tip 13 a. It is supposed to be. The protector 40 having such a function includes a protector main body 41 and a holder 42.

  The protector body 41 is a substantially rectangular box-shaped member made of various metal materials such as stainless steel, aluminum, aluminum alloy, titanium, titanium alloy, copper, or copper-based alloy and extending in the axial direction. A passage hole for allowing the inner needle to pass is formed in the distal end plate and the proximal end plate of the box-shaped member, and flexible side plates 43 and 44 facing left and right from the distal end plate extend in the distal end direction. Is inserted through the inner needle 13. Further, an engagement portion (not shown) is formed at the distal end side portion of the inner needle 13, and the engagement portion pulls out the inner needle 13 so that the needle tip 13 a fits between the two flexible side plates 43 and 44. And engages with the protector main body 41. As a result, the protector main body 41 moves integrally with the inner needle 13 when the needle tip 13a fits between the two flexible side plates 43 and 44. The protector body 41 is housed in a substantially cylindrical holder 42.

  The holder 42 accommodates the protector main body 41 in a rearward relative displacement with respect to the holder 42. When the protector main body 41 is pulled rearward while being engaged with the engaging portion of the inner needle 13, the holder 42 is held together with the inner needle 13. It can be pushed backward in 42. The two flexible side plates 43 and 44 of the protector main body 41 are formed so as to slightly expand in the radial direction. By pushing the protector main body 41 backward in the holder 42, the two flexible side plates 43 and 44 are formed. 44 is pushed down inside. In addition, hook-shaped portions 43a and 44a are formed at the tip portions of the two flexible side plates 43 and 44, and the two flexible side plates 43 and 44 are engaged with each other by being pushed down inside. By doing so, the needle tip 13a is covered and protected by the two hook-shaped portions 43a and 44a. Therefore, by pulling out the inner needle 13 in the proximal direction, the needle tip 13a is protected by the hook-shaped portions 43a and 44a.

  The protector 40 configured as described above has a distal end side portion inserted into the proximal end side space 21 c of the main body portion 21 of the outer needle hub 11. Further, an engagement groove 21d is formed on the inner peripheral surface of the main body portion 21 on the proximal side from the mounting portion 27 over the entire circumference, and the holder 42 of the protector 40 corresponds to the engagement groove 21d. A pair of front and rear engagement pieces 42a is provided at the position to be engaged. The engagement piece 42a is disposed at the front end portion of the holder 42 so as to be separated from the front and rear, and the front end portion projects in the radial direction. When the distal end portion of the protector 40 is inserted into the proximal end space 21c, the protruding portion of the engagement piece 42a enters the engagement groove 21d and engages. By engaging in this way, the protector 40 is prevented from being detached from the main body portion 21 with a small load.

  On the other hand, the base end side portion of the protector 40, that is, the base end side portion of the holder 42 protrudes from the outer needle hub 11, and these portions are accommodated in the inner hole 14 b of the inner needle hub 14. The base end side portion of the holder 42 is formed in substantially the same shape as the inner hole 14b of the inner needle hub 14, and the base end side portion of the holder 42 is fitted in the inner hole 14b with almost no backlash. .

  Since the sealed indwelling needle 1A configured as described above includes the protector 40, the needle tip 13a can be prevented from being exposed when the inner needle 13 is withdrawn. In addition, since the base end portion of the protector 40 is fitted and inserted into the inner hole 14b of the inner needle hub 14, the base of the protector 40 is used when the inner needle 13 is pulled backward and the needle tip 13a is placed in the outer needle 12. It can be used as a guide at the end portion. Thereby, when the inner needle 13 is pulled backward and the needle tip 13a is housed in the outer needle 12, it is possible to suppress the vertical and horizontal blurring of the inner needle 13.

  Further, in the sealed indwelling needle 1A, in the region from the position where the grip portion 32b is adjacent to the position where the wing portion 32 of the inner needle hub 14 is provided in the main body portion 21 of the outer needle hub 11, that is, in the axial direction. The protector 40 is arranged in a region where the wing part 32 extends. Therefore, it is not necessary to extend the sealed indwelling needle 1A for the protector 40, and it is possible to suppress an increase in the external dimensions, particularly the length, of the sealed indwelling needle 1A.

  The sealed indwelling needle 1 </ b> A has an engagement groove 21 d on the inner peripheral surface of the main body portion 21 on the proximal side from the placement portion 27. That is, since the engaging groove 21d can be formed away from the mounting portion 27, the outer needle hub 11A can be formed at the time of forming the outer needle hub 11A as compared with the case where the mounting portion 27 and the engaging groove 21d overlap each other radially inward. Problems can be suppressed.

  In addition, the sealed indwelling needle 1A of the second embodiment has the same effects as the sealed indwelling needle 1 of the first embodiment.

[Other embodiments]
In the sealed indwelling needles 1 and 1A according to the first and second embodiments, the mounting portion 27 is configured by the protruding strip portions 27a to 27c which are the friction coefficient increasing portions, but only such protrusions are used. Alternatively, it may be formed of silicon or rubber so as to stick to the skin (for example, like a suction cup) or may be formed by performing a satin finish. Further, the placing portion 27 is not necessarily a friction coefficient increasing portion, and may be the outer peripheral surface of the outer needle hub 11 as it is, or may be a portion formed flat.

Further, in the sealed indwelling needles 1 and 1A of the first and second embodiments, the wing portion 32 is formed in a substantially drop shape, but it is not always necessary to have such a shape. For example, the connecting portion 32a may be formed in a rod shape, and the gripping portion 32b may be formed in a generally elliptical shape, a generally rectangular shape, or a generally triangular shape in plan view.
Further, the tip of the inner needle may be conical so that the blade surface is not formed.

DESCRIPTION OF SYMBOLS 1, 1A Sealing type indwelling needle 11 Outer needle hub 12 Outer needle 12a Insertion hole 13 Inner needle 13a Needle tip 14 Inner needle hub 27 Placement part 31 Inner needle hub main body 31c Extending part 32 Gripping part 32c, 32d Gripping surface 40 Protector

Claims (12)

An inner needle having a sharp needle tip at the distal end;
A hollow outer needle through which the inner needle is inserted;
An outer needle hub body having an inner hole through which the inner needle is inserted and having the outer needle attached to a distal opening, and a tube provided on a peripheral surface of the outer needle hub body and to which a tube is attached An outer needle hub having a mounting portion;
An inner needle hub provided on the proximal end side of the inner needle protruding from the outer needle hub, and provided so as to be relatively displaceable with respect to the outer needle hub;
The inner needle hub includes an inner needle hub body to which the inner needle is attached to a distal end portion, and a wing portion provided on the inner needle hub body and protruding from the inner needle hub body to the distal side. And
The wing portion has a plate-like gripping portion located on the distal side of the wing portion and having gripping surfaces on both sides,
The grip portion is located in the vicinity of the outer needle hub body,
The outer needle hub body has a non-slip portion on the outer peripheral surface of the outer needle hub body,
The indwelling needle assembly, wherein the anti-slip portion is located in the vicinity of the grip portion. The inner needle has a blade surface at the needle tip,
The grip portion rises diagonally upward and away from the tube mounting portion when the blade surface is directed upward in the direction of gravity.
The indwelling needle assembly according to claim 1, wherein the anti-slip portion is formed at least at a position sandwiching the grip portion when the blade surface is directed upward in the gravity direction. The tube mounting portion is provided in an intermediate portion of the outer needle hub body,
The indwelling needle assembly according to claim 1 or 2, wherein the non-slip portion is formed at an intermediate portion of the outer needle hub body. The indwelling needle assembly according to claim 3, wherein the non-slip portion is also formed on an upper surface of the tube attachment portion. The indwelling needle assembly according to any one of claims 1 to 4, wherein the anti-slip portion is formed so as to protrude from an outer peripheral surface of the outer needle hub main body.   The indwelling needle assembly according to any one of claims 1 to 5, wherein the inner needle hub body has an extending portion that extends to a proximal side from the wing portion.   The indwelling needle assembly according to claim 6, wherein the extending portion extends from the anti-slip portion to a position of at least 25 mm on the proximal end side. The indwelling needle assembly according to claim 7, wherein the extending portion extends from the anti-slip portion to a position of at least 40 mm on the proximal end side.   The length of the extending part in the extending direction is formed so as to be 2 to 3 times the length of the holding part in the extending direction. Indwelling needle assembly.   The indwelling needle assembly according to claim 3, wherein the grip portion is formed so as to become thicker as it approaches the anti-slip portion, and the grip surface is inclined toward the anti-slip portion. A protector that is inserted into each of the outer needle hub and the inner needle hub and protects the needle tip of the inner needle when pulled out from the outer needle hub together with the inner needle;
The protector has a passage hole for allowing the inner needle to pass through, and the passage hole is disposed between the anti-slip portion and a connection portion between the main body of the inner needle hub and the wing portion. The indwelling needle assembly according to any one of claims 1 to 10. A protector that is inserted into the outer needle hub and protects the needle tip of the inner needle when pulled out from the outer needle hub together with the inner needle;
The outer needle hub has an engagement groove on the inner peripheral surface of the outer needle hub and proximal to the anti-slip portion,
The indwelling needle assembly according to any one of claims 1 to 11, wherein the protector includes an engagement piece that engages with the engagement groove in a state of being inserted into the outer needle hub.