JP5191823B2 - Indwelling needle and puncture needle - Google Patents

Description

  The present invention relates to an indwelling needle and a puncture needle, and more particularly to an indwelling needle and a puncture needle that can detect a position at the time of puncturing using ultrasonic waves.

  For example, when a high-concentration nutrient solution is infused into a patient, an indwelling needle including a catheter (outer needle) and a puncture needle (inner needle) is punctured and inserted into a vein close to the heart, and then the outer peripheral side of the puncture needle Only the catheter provided in the vessel is placed in the blood vessel, and the infusion is performed by connecting an infusion line to which a nutrient solution, a drug solution, or the like is supplied to the catheter. When puncturing such an indwelling needle, for example, an ultrasonic wave is transmitted from an ultrasonic imaging device, the position of the blood vessel to be punctured is confirmed, the ultrasonic wave is irradiated to the punctured puncture needle, and the reflected wave thereof The treatment is performed while confirming the position of the puncture needle by the image obtained based on the above.

  The indwelling needle includes, for example, a tubular outer needle and an inner needle that is slidably inserted therein, and a concave spiral groove is formed on the outer peripheral surface of the inner needle. Then, the puncture needle is punctured into the affected area of the patient, and the ultrasonic wave is irradiated from the ultrasonic imaging device to the puncture site, so that the ultrasonic wave is reflected to the air layer in the spiral groove and the reflected wave is An image picked up by the puncture needle is obtained by receiving with an ultrasonic imaging device (see, for example, Patent Document 1).

  In addition, confirmation by ultrasonic waves is performed even with a puncture needle that punctures without using an outer needle. As such a puncture needle, for example, it is formed in a tubular shape, and a plurality of V grooves are formed in a spiral shape on the outer peripheral surface thereof. The V groove is recessed at a predetermined depth with respect to the outer peripheral surface, and when the patient is punctured with a puncture needle and inserted into the body, the ultrasonic waves emitted from the ultrasonic device are reflected by the V groove and The position is specified by being detected by the sonic device (see, for example, Patent Document 2).

Japanese Patent No. 3171525 JP-A-3-228748

  However, in the prior art according to Patent Document 1, the outer peripheral surface of the inner needle constituting the indwelling needle is formed in an uneven shape from a concave spiral groove and a portion where the spiral groove is not formed. When the inner needle is removed while leaving the needle, the uneven outer peripheral surface is caught on the inner peripheral surface of the outer needle, and therefore, it may not be possible to operate smoothly. On the other hand, in the prior art according to Patent Document 2, since the outer peripheral surface of the puncture needle is formed in a concavo-convex shape from the V-groove and the portion where the V-groove is not formed, the puncture needle is punctured to the patient. When performing or removing, there is a concern that the uneven outer peripheral surface becomes resistance when traveling through the body, and the burden on the patient due to the resistance increases.

  The present invention has been made in consideration of the above-described problems, has a good operability, can smoothly puncture a patient, and can reduce the burden on the patient and the puncture needle. The aim is to provide a needle.

To achieve the above object, the present invention provides an indwelling needle having an outer needle and an inner needle inserted into the outer needle.
The inner needle is provided on the outer peripheral surface in the vicinity of the distal end portion, and a first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface;
A detection groove is provided on the outer surface of the first recess, and has a second recess recessed toward the inner periphery with respect to the outer surface.

  According to the present invention, provided on the outer peripheral surface in the vicinity of the distal end portion of the inner needle is provided on the outer surface of the first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface, and on the outer surface of the first concave portion. A detection groove comprising a second recess recessed on the circumferential side is provided. The inner needle is inserted into the outer needle, and the detection groove is positioned inside the outer needle, so that when the indwelling needle is punctured into the patient, the detection groove of the inner needle is in the patient's body. Direct contact with the tissue can be avoided. Accordingly, there is no resistance when the patient is punctured with the indwelling needle including the inner needle, the treatment can be performed by smoothly puncturing the indwelling needle, and the burden on the patient is reduced.

  Furthermore, since the ultrasonic wave irradiated from the ultrasonic device can be reliably and suitably reflected by the second recess, the indwelling needle punctured by the patient can be confirmed with high accuracy, and the position of the indwelling needle can be determined. It is possible to perform a safe and reliable procedure while checking.

  Furthermore, when the inner needle is removed from the patient while leaving the outer needle, the inner needle detection groove is recessed with respect to the outer peripheral surface, so that it can be prevented from being caught on the inner peripheral surface of the outer needle, so The inner needle can be removed.

In the puncture needle, the present invention is provided on the outer peripheral surface in the vicinity of the distal end portion, the first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface;
A detection groove is provided on the outer surface of the first recess, and has a second recess recessed toward the inner periphery with respect to the outer surface.

  According to the present invention, the outer peripheral surface in the vicinity of the distal end portion of the puncture needle is provided on the outer surface of the first recess, the first recess recessed toward the inner periphery with respect to the outer periphery, and the inner surface with respect to the outer surface. A detection groove comprising a second recess recessed on the circumferential side is provided. When the puncture needle having the detection groove is punctured into the patient, the detection groove is recessed with respect to the outer peripheral surface, so that the body tissue of the patient is prevented from contacting the second recess, and the body tissue Is prevented from being caught on the uneven portion formed by the first and second recesses. Accordingly, there is no resistance when puncturing the patient with the puncture needle, the treatment can be performed by smoothly puncturing the puncture needle, and the burden on the patient is reduced.

  Further, since the ultrasonic wave irradiated from the ultrasonic device can be reliably and suitably reflected by the second recess, the puncture needle punctured by the patient can be confirmed with high accuracy, and the position of the puncture needle can be determined. It is possible to perform a safe and reliable procedure while checking.

  Furthermore, the puncture needle is attached to the patient by having joint surfaces at both ends along the axial direction of the first recess that are gradually enlarged in the radial direction toward the outer peripheral surface and joined to the outer peripheral surface. When the needle is punctured, the resistance when the body tissue enters the first recess can be reduced, and the puncture resistance of the puncture needle can be reduced to perform the treatment more smoothly.

  Furthermore, the detection groove is formed along the circumferential direction with a width dimension having a predetermined angle with the center line of the puncture needle as a fulcrum, extending along the axis direction of the puncture needle. The irradiation device can more reliably detect the vicinity of the tip of the puncture needle.

  Moreover, it is good to provide a 2nd recessed part in the center part in the width direction of a 1st recessed part, and to be dented in the convex shape toward the inner peripheral side of the said puncture needle with respect to the bottom face of the said 1st recessed part.

  Further, by forming the second recess with a width dimension substantially the same as the width dimension along the circumferential direction of the first recess, the second recess is widened to reliably and suitably reflect the ultrasonic wave by the ultrasonic irradiation device. Thus, the position detection accuracy of the puncture needle can be improved.

  According to the present invention, the following effects can be obtained.

  That is, provided on the outer peripheral surface in the vicinity of the distal end portion of the inner needle constituting the indwelling needle is provided on the outer surface of the first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface, By providing a detection groove comprising a second recess recessed on the inner peripheral side, when the indwelling needle is punctured into the patient, the second recess of the detection groove recessed with respect to the outer peripheral surface contacts the body tissue of the patient. This prevents the in-vivo tissue from being caught on the uneven portion formed by the first and second recesses. As a result, resistance does not occur when the patient is punctured with the indwelling needle, the treatment can be performed by smoothly puncturing the indwelling needle, and the burden on the patient during puncturing is reduced.

  Also, provided on the outer peripheral surface in the vicinity of the distal end portion of the puncture needle are a first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface, and an outer surface of the first concave portion that is recessed toward the inner peripheral side with respect to the outer surface. By providing the detection groove comprising the second recess, it is avoided that when the puncture needle is punctured into the patient, the second recess of the detection groove that is recessed with respect to the outer peripheral surface comes into contact with the body tissue of the patient. The body tissue is prevented from being caught on the uneven portion formed by the first and second recesses. As a result, resistance does not occur when puncturing the patient with the puncture needle, the treatment can be performed by smoothly puncturing the puncture needle, and the burden on the patient during puncture is reduced.

  Preferred embodiments of the indwelling needle and the puncture needle according to the present invention will be given and described in detail below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates an indwelling needle according to an embodiment of the present invention.

  As shown in FIGS. 1 and 2, the indwelling needle 10 includes a catheter (outer needle) 12, an outer needle hub 14 that holds the catheter 12, and a puncture needle (inner needle) that is inserted into the catheter 12. 16 and an inner needle hub 18 that holds the puncture needle 16, and the inner needle hub 18 is configured to fit inside the outer needle hub 14. A syringe 20 can be connected to the end of the inner needle hub 18.

  The catheter 12 includes an outer needle main body 22, and the outer needle main body 22 is formed to be transparent from, for example, a resin material, has appropriate elasticity, and is provided so as to cover the outer peripheral side of the puncture needle 16. The outer needle main body 22 reaches the vicinity of the distal end of the puncture needle 16, and when the distal end of the puncture needle 16 is inserted into the blood vessel, the outer needle main body 22 is also inserted into the same blood vessel.

  As shown in FIGS. 3 and 4, the puncture needle 16 is a hollow tube having a distal end portion that is inclined with respect to the axis, and a proximal end portion of the inner needle hub 18. It is held at the tip. The outer circumferential surface 16a of the puncture needle 16 is provided with a detection groove 24 extending along the axial direction (the directions of arrows A and B).

  As shown in FIGS. 3 to 7, the detection groove 24 is formed in a straight line with a predetermined length in the vicinity of the distal end portion of the puncture needle 16 and with a predetermined width along the circumferential direction. The detection groove 24 is provided on the outer surface of the outer surface 16a of the puncture needle 16 in a first recess 26 that is recessed by a predetermined depth in the radial inner direction (inner periphery), and on the outer surface of the first recess 26. And both end portions along the axial direction of the first concave portion 26 gradually become shallower toward the outer peripheral surface 16a, and inwardly in the radial direction. They are joined by gentle curved surfaces (joint surfaces) 30a and 30b that are concave toward each other.

  That is, the detection groove 24 is formed in a stepped shape that is recessed in two steps with respect to the outer peripheral surface 16 a of the puncture needle 16 by the first recess 26 and the second recess 28. Note that both end portions of the first concave portion 26 may be joined to the outer peripheral surface 16a with a gentle tapered surface inclined at a small angle with respect to the bottom surface of the first concave portion 26, instead of the gentle curved surfaces 30a and 30b. Good.

  The second recess 28 is recessed in a substantially hemispherical shape toward the center of the puncture needle 16 on the bottom surface of the first recess 26, and is formed at a substantially central portion along the width direction of the first recess 26. A plurality (for example, five) are provided at equal intervals along 26 axial directions (arrows A and B). In other words, the second recess 28 is formed in a concave shape toward the inner peripheral side of the puncture needle 16.

  The syringe 20 includes a cylindrical syringe body 32 and a plunger 34 inserted into the syringe body 32. A gasket 36 is attached to one end of the plunger 34, and the proximal end of the plunger 34 is a syringe body. Projecting outward from the base end of 32.

  A connection port 38 projects from the distal end portion of the syringe body 32 and is connected to the proximal end portion of the inner needle hub 18 via the connection port 38. That is, the syringe 20 communicates with the inside of the inner needle hub 18 through the connection port 38.

  The indwelling needle 10 according to the embodiment of the present invention is basically configured as described above. Next, the method of use and the function and effect thereof will be described.

  First, as shown in FIG. 8, a medical staff such as a doctor grasps the indwelling needle 10 including the puncture needle 16 and punctures it toward the blood vessel (vein) of the patient 40, and points the puncture needle 16 toward a desired site. By gradually inserting, the distal end portion advances while opening the body tissue 42. At this time, as shown in FIG. 9, the puncture needle 16 is inserted into the catheter 12, and in this state, the detection groove 24 of the puncture needle 16 is located inside the catheter 12. For this reason, the indwelling needle 10 is punctured without the detection groove 24 of the puncture needle 16 contacting the body tissue 42.

  On the other hand, at the same time when the indwelling needle 10 is punctured into the patient 40, the probe 46 of the ultrasonic echo device (ultrasonic irradiation device) 44 is pressed against the vicinity of the puncture site of the patient 40 to irradiate the echo beam (ultrasonic wave) E. The probe 46 is configured to receive the echo beam E reflected by generating the echo beam E.

  This echo beam E is irradiated from the skin surface of the patient 40 toward the inside, and is transmitted through the catheter 12 and reflected by the detection groove 24 of the puncture needle 16 toward the probe 46 as shown in FIG. Received in progress.

  The echo beam E reflected by the detection groove 24 of the puncture needle 16 is received by the probe 46, and the received data is output from the probe 46 to the control unit (not shown) of the ultrasonic echo device 44 through the lead wire 48. After being processed, it is displayed on the display 50 as an image. More specifically, the image of the puncture needle 16 displayed on the display 50 is displayed in a linear shape by the length along the axial direction (arrow A, B direction) of the detection groove 24 detected by the ultrasonic echo device 44. Then, it can be confirmed from the display 50 whether or not the distal end portion has reached the blood vessel (vein) of the patient 40.

  As a result, the vicinity of the tip of the puncture needle 16 is clearly displayed as an image on the display 50 of the ultrasonic echo device 44, and the position of the puncture needle 16 constituting the indwelling needle 10 is confirmed with high accuracy.

  Then, the doctor or the like moves the puncture needle 16 and the probe 46 while checking the display 50, and guides the puncture needle 16 to the blood vessel of the patient 40. At this time, the indwelling needle 10 is advanced while appropriately pulling the plunger 34 of the syringe 20.

  When the puncture needle 16 is correctly punctured into the blood vessel, blood is introduced into the syringe body 32 through the connection port 38 of the syringe 20 and flashback occurs.

  Thus, after it was confirmed that the puncture needle 16 was punctured into the blood vessel, the catheter 12 was left, the puncture needle 16 and the syringe 20 were removed, and a guide wire (not shown) was inserted into the blood vessel via the catheter 12. Later, the catheter 12 is removed. Next, an indwelling catheter (central venous catheter) (not shown) is placed in the blood vessel along the guide wire. Next, an infusion line (not shown) is connected to the indwelling catheter to supply nutrients, chemicals, and the like into the blood vessel.

  When the puncture needle 16 is removed while leaving the catheter 12, the puncture needle 16 is removed from the body of the patient 40 through the inside (lumen) of the catheter 12, so that the puncture needle 16 is the same as at the time of puncture. The detection groove 24 does not contact the body tissue 42. Moreover, since the detection groove 24 of the puncture needle 16 is provided so as to be recessed with respect to the outer peripheral surface 16a, it is possible to prevent the detection groove 24 from being caught on the inner peripheral surface of the catheter 12.

  As described above, in the present embodiment, the outer circumferential surface 16 a of the puncture needle 16 includes the first concave portion 26 that is recessed from the outer peripheral surface 16 a and the second concave portion 28 that is further recessed with respect to the first concave portion 26. By providing the groove 24, resistance generated when the puncture needle 16 is punctured or removed from the patient 40 can be suppressed, and a smooth puncture operation can be performed. Can be reduced.

  Further, the second concave portion 28 is further recessed with respect to the first concave portion 26 that is recessed with respect to the outer peripheral surface 16a of the puncture needle 16, so that the echo beam E irradiated from the ultrasonic echo device 44 is reliably and suitably reflected. And can be detected by the ultrasonic echo device 44. As a result, the tip of the puncture needle 16 punctured by the patient 40 can be clearly displayed as an image on the display 50 of the ultrasonic echo device 44, and the position thereof can be confirmed with high accuracy. A doctor or the like can perform a safe and reliable procedure while confirming the above.

  That is, the detection groove 24 prevents the second recess 28 that can reflect the ultrasonic waves from the ultrasonic echo device 44 and the second recess 28 from contacting the body tissue 42 when the puncture needle 16 is punctured. The first recess 26 is formed. In other words, the first recess 26 functions as an escape groove for allowing the second recess 28 to escape from the body tissue 42 in close contact with the outer peripheral surface 16 a of the puncture needle 16.

  Further, since a space is generated between the second recess 28 and the catheter 12 in the detection groove 24 at the time of puncturing, the echo beam E irradiated from the ultrasonic echo device 44 is reflected by the air in the space, and the second recess It can be detected by the ultrasonic echo device 44 together with the echo beam E reflected by 28. As a result, the detection accuracy of the puncture needle 16 can be further improved.

  Next, puncture needles 100 and 120 according to first and second modifications will be described. In addition, the same referential mark is attached | subjected to the component same as the puncture needle 16 which concerns on embodiment of this invention mentioned above, and the detailed description is abbreviate | omitted.

  As shown in FIGS. 10 to 12, the puncture needle 100 according to the first modification has a rectangular cross section in which the second recess 104 constituting the detection groove 102 extends in a direction orthogonal to the axis of the puncture needle 100. It is different from the puncture needle 16 according to the embodiment of the present invention in that it is formed. A plurality of (for example, five) second recesses 104 are provided at equal intervals along the axial direction of the detection groove 102, and are recessed in a convex shape toward the inner peripheral side of the puncture needle 100. The second recess 104 is formed with the same width dimension as the first recess 26 in the circumferential direction of the puncture needle 100.

  Thus, by forming the second recess 104 in a rectangular cross section, it is possible to secure a larger area of the second recess 104 compared to the puncture needle 16 according to the embodiment of the present invention. Further, the detection accuracy when detecting the position of the puncture needle 100 by the ultrasonic echo device 44 can be further improved, and the resistance when puncturing the puncture needle 100 is reduced, and the burden on the patient 40 can be reduced. .

  As shown in FIGS. 13 to 15, the puncture needle 120 according to the second modification has a detection groove 126 formed of first and second recesses 122 and 124 along a circumferential direction orthogonal to the axis of the puncture needle 120. The puncture needle 100 is different from the puncture needle 100 according to the first modification in that it is formed in a wide shape and the bottom surface of the second recess 124 is formed in a circular arc shape that is substantially parallel to the outer peripheral surface of the puncture needle 120. ing.

  The detection groove 126 is formed on the outer peripheral surface of the puncture needle 120 within a range of a predetermined angle θ centered on the axis of the puncture needle 120. For example, the angle θ may be set to 120 °, and more preferably 180 °. That is, the first concave portion 122 and the second concave portion 124 constituting the detection groove 126 are formed with the same width dimension in the circumferential direction of the puncture needle 120.

  Thus, by providing the detection groove 126 in a wide shape along the circumferential direction of the puncture needle 120, it is possible to ensure a large area of the detection groove 126 compared to the puncture needle 16 according to the embodiment of the present invention. Therefore, the detection accuracy when detecting the position of the puncture needle 120 by the ultrasonic echo device 44 can be further improved, and the resistance when puncturing the puncture needle 120 is reduced and the burden on the patient 40 is reduced. Can be reduced.

  Next, a puncture device 150 having the puncture needle 16 and capable of injecting a drug solution or the like into the patient 40 will be described with reference to FIGS. 16 and 17. In addition, the same referential mark is attached | subjected to the component same as the indwelling needle 10 which concerns on this Embodiment mentioned above, and the detailed description is abbreviate | omitted.

  The puncture device 150 includes a puncture needle 16, a needle hub 152 that holds the puncture needle 16, and a syringe 154. The puncture needle 16 is a hollow tube, and its distal end is formed obliquely with respect to the axis, and the proximal end is held at the distal end of the needle hub 152. And the detection groove 24 extended along an axial direction (arrow A, B direction) is provided in the outer peripheral surface of the puncture needle 16. FIG. Since the detection groove 24 has the same configuration as that provided on the puncture needle 16 that constitutes the indwelling needle 10 described above, a detailed description thereof will be omitted.

  The syringe 154 is connected to the needle hub 152 via a connection port 158 provided at the distal end portion of the syringe body 156 and communicates with the inside of the needle hub 152.

  When the puncture device 150 is punctured into the blood vessel (vein) of the patient 40, the puncture needle 16 is punctured and gradually inserted toward the blood vessel so that the distal end of the puncture instrument 150 opens the body tissue 42. As a result, the outer peripheral surface 16a of the puncture needle 16 advances while being in close contact with the body tissue 42. At this time, as shown in FIG. 17, the in-vivo tissue 42 is suppressed from entering the detection groove 24 that is recessed with respect to the outer peripheral surface 16 a of the puncture needle 16, and the in-vivo tissue 42 forms the detection groove 24. Contact with the bottom surfaces of the first and second recesses 26 and 28 is avoided. As a result, the body tissue 42 is prevented from being caught by the second recess 28 of the detection groove 24. In addition, since the joint portion between the outer peripheral surface 16a of the puncture needle 16 and the detection groove 24 is also formed by gentle curved surfaces 30a and 30b, even when the body tissue 42 slightly enters the first recess 26, the joint portion is not formed. It is prevented from being caught. That is, resistance when puncturing the puncture needle 16 into the body of the patient 40 is reduced, and the puncture operation can be performed smoothly.

  Further, when the puncture needle 16 is punctured, an echo beam E irradiated from an ultrasonic echo device (not shown) is reflected on the second recess 28 of the detection groove 24, and the echo beam E reflected on the second recess 28 is an ultrasonic echo. Detected by the device. As a result, the tip position of the puncture needle 16 punctured by the patient 40 can be reliably detected.

  After confirming that the puncture needle 16 has been punctured into the blood vessel, the plunger 34 of the syringe 154 is pressed toward the puncture needle 16 (in the direction of arrow A) to puncture the drug solution or the like filled therein. Supply to the blood vessel through the needle 16.

  When the puncture needle 16 is removed from the puncture site, the detection groove 24 is provided in a concave shape with respect to the outer peripheral surface 16 a of the puncture needle 16, so that the body tissue 42 enters the detection groove 24. Is suppressed, and the puncture needle 16 can be smoothly removed without being caught by the body tissue 42. That is, the burden on the patient 40 when removing the puncture needle 16 is reduced. Thus, in the indwelling needle 10 described above, the patient 40 can be punctured without using the catheter 12 with the puncture needle 16 that punctures the patient 40 while being inserted into the catheter 12.

  In the above-described embodiment, the case where the puncture device 150 includes the puncture needle 16 has been described. However, the present invention is not limited to this. For example, the puncture instrument 150 may include the puncture needles 100 and 120 described above. Good.

  Of course, the indwelling needle and the puncture needle according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

FIG. 1 is an overall configuration diagram showing an indwelling needle according to the present embodiment. FIG. 2 is an overall longitudinal sectional view of the indwelling needle shown in FIG. FIG. 3 is an enlarged cross-sectional view showing the vicinity of the tip of the indwelling needle of FIG. FIG. 4 is an enlarged perspective view showing the distal end portion of the puncture needle constituting the indwelling needle of FIG. FIG. 5 is an enlarged plan view showing the vicinity of the detection groove in the puncture needle of FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a schematic diagram showing a state in which a patient is punctured with an indwelling needle and a puncture needle constituting the indwelling needle is detected by an ultrasonic echo device. FIG. 9 is an enlarged view showing a state where the ultrasonic wave from the ultrasonic echo device is irradiated and reflected on the indwelling needle of FIG. FIG. 10 is an enlarged perspective view showing the vicinity of the distal end portion of the puncture needle according to the first modification. FIG. 11 is an enlarged plan view showing the vicinity of the detection groove in the puncture needle of FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. FIG. 13 is an enlarged perspective view showing the vicinity of the distal end portion of the puncture needle according to the second modification. FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. FIG. 16 is an overall configuration diagram showing a puncture device using a puncture needle. FIG. 17 is an enlarged cross-sectional view showing the vicinity of the distal end portion of the puncture needle of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Indwelling needle 12 ... Catheter 16, 100, 120 ... Puncture needle 20, 154 ... Syringe 24, 102, 126 ... Detection groove | channel 26, 122 ... 1st recessed part 28, 104, 124 ... 2nd recessed part 30a, 30b ... Curved surface 42 Body tissue 44 Ultrasonic echo device 46 Probe 150 Puncture 152 Needle hub

Claims (7)

In an indwelling needle having an outer needle and an inner needle inserted into the outer needle,
The inner needle is provided on the outer peripheral surface in the vicinity of the distal end portion, and a first concave portion that is recessed toward the inner peripheral side with respect to the outer peripheral surface;
A detection groove provided on the outer surface of the first recess and having a second recess recessed toward the inner periphery with respect to the outer surface ;
The first recess has a long axis extending along the axial direction of the inner needle and a short axis formed along the circumferential direction of the inner needle,
It said second recess is indwelling needle characterized by Rukoto plurality arranged along the longitudinal direction of the first recess. The indwelling needle according to claim 1,
The indwelling needle is characterized in that the detection groove is located inside the outer needle while the inner needle is inserted into the outer needle. In a puncture needle that punctures a living tissue,
A first recess provided on the outer peripheral surface in the vicinity of the tip, and recessed toward the inner peripheral side with respect to the outer peripheral surface;
A detection groove provided on the outer surface of the first recess and having a second recess recessed toward the inner periphery with respect to the outer surface ;
The first recess has a long axis extending along the axial direction of the puncture needle and a short axis formed along the circumferential direction of the puncture needle,
The second recess, the puncture needle to a plurality provided wherein isosamples along the long axis direction of the first recess. The puncture needle according to claim 3,
A puncture needle characterized in that at both end portions along the axial direction of the first recess, there are joint surfaces that gradually increase in diameter in the radial direction toward the outer peripheral surface and are joined to the outer peripheral surface. The puncture needle according to claim 3 or 4,
The detection groove extends along the axial direction of the puncture needle, and is formed along the circumferential direction with a width of a predetermined angle with the center line of the puncture needle as a fulcrum. Puncture needle. The puncture needle according to any one of claims 3 to 5,
The second recess is provided at a central portion in the width direction of the first recess, and is formed to be concave in a convex shape toward the inner peripheral side of the puncture needle with respect to the bottom surface of the first recess. A puncture needle. The puncture needle according to any one of claims 3 to 5,
The puncture needle, wherein the second recess is formed with a width dimension substantially the same as the width dimension along the circumferential direction of the first recess.

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