WO2011004776A1 - Dispositif d'aiguille de biopsie, support et aiguille de biopsie - Google Patents

Dispositif d'aiguille de biopsie, support et aiguille de biopsie Download PDF

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Publication number
WO2011004776A1
WO2011004776A1 PCT/JP2010/061354 JP2010061354W WO2011004776A1 WO 2011004776 A1 WO2011004776 A1 WO 2011004776A1 JP 2010061354 W JP2010061354 W JP 2010061354W WO 2011004776 A1 WO2011004776 A1 WO 2011004776A1
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WO
WIPO (PCT)
Prior art keywords
needle
inner needle
tissue
groove
biopsy
Prior art date
Application number
PCT/JP2010/061354
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English (en)
Japanese (ja)
Inventor
健吾 本田
Original Assignee
株式会社プラスチック・ホンダ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社プラスチック・ホンダ filed Critical 株式会社プラスチック・ホンダ
Priority to JP2010532762A priority Critical patent/JPWO2011004776A1/ja
Publication of WO2011004776A1 publication Critical patent/WO2011004776A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms

Definitions

  • the present invention relates to a biopsy needle device including a holder that holds a biopsy needle composed of an inner needle and an outer needle, and a holder and a biopsy needle, and more particularly, a biopsy needle device for collecting a part of a human tissue, and
  • the present invention relates to a holder and a biopsy needle.
  • Patent Documents 1 and 2 as a biopsy needle device for collecting a part of a human tissue, one having an inner needle and an outer needle into which the inner needle is inserted is known. It has been. A groove-shaped notch extending in the axial direction is formed at one position on the tip side surface of the inner needle.
  • the inner needle and the outer needle into which the inner needle is inserted are inserted into the tissue, and then only the inner needle is further inserted into the tissue to be collected.
  • the outer needle is further inserted along the inner needle, and a part of the tissue that has entered the notch portion of the inner needle is cut off at the distal end edge portion of the outer needle. Then, the inner needle and the outer needle are pulled out from the tissue, and a part of the tissue cut out from the notch portion of the inner needle is collected.
  • cancer screening first, whether or not cancer is present is examined with the collected tissue, and if cancer is present, further examination is performed with the collected tissue to select a drug effective for the cancer.
  • a drug effective for the cancer There is a need.
  • conventional biopsy needles when the outer needle is inserted along the inner needle, a part of the tissue that has entered the notch is pushed by the distal edge of the outer needle and is displaced toward the distal end of the inner needle. In many cases, the tissue protrudes from the notch, and a small amount of tissue is actually collected. For this reason, a test is performed to check whether cancer is present in the tissue collected at the first time, and if cancer is present, a second test is performed to select an effective drug for cancer in the tissue. It is carried out.
  • tissue sampling twice is a burden on the patient, and the patient knows that he / she is suffering from cancer, which causes the patient to feel uneasy. Furthermore, since tissue sampling is performed twice, the site where the tissue is inserted may be shifted, which is not preferable for examination.
  • an inner needle with two cutouts has been proposed for the purpose of collecting two tissues of the same site in a single tissue collection. However, two cutouts should be formed.
  • the mechanical strength of the inner needle is lowered, there is a problem that it becomes very difficult to use.
  • a small amount of tissue can be collected with such a biopsy needle. Furthermore, in recent years, it is necessary to further examine the collected tissue in order to determine the patient's DNA, and a biopsy needle capable of collecting a larger amount of tissue is desired.
  • the present invention has an object to provide a biopsy needle device, a holder, and a biopsy needle that can collect a plurality of tissues at the same site and can collect a larger amount of tissues.
  • the biopsy needle device is formed in a pointed shape in a biopsy needle device that punctures a tissue, takes a part of the tissue, and extracts a part of the tissue pulled out from the tissue
  • An inner needle having a distal end portion and a chord winding groove formed rearward from the distal end portion, an outer needle into which the inner needle is inserted, the inner needle can be moved straight in the axial direction
  • a support member that is rotatably supported on the support member, and a holder that holds the inner needle and the outer needle supported by the support member, and after inserting the inner needle and the outer needle into the tissue, Only the inner needle is moved straight and rotated, and further inserted, and then the outer needle is further inserted along the inner needle, and a part of the tissue is inserted into the groove portion between the inner needle and the outer needle.
  • the tip portion of the inner needle is formed in a pointed shape, when entering the tissue, it can smoothly enter without damaging the tissue. Furthermore, since the chord winding groove is formed on the outer circumference of the inner needle, the inner needle can enter the tissue while automatically rotating. That is, the axial force received from the tissue when the inner needle enters the tissue is divided into the circumferential force at the edge of the chord winding groove, so that the inner needle is automatically Rotate to. Therefore, a plurality of tissues at the same site can be taken into the string winding groove, and a larger amount of tissue can be taken in a large amount continuously.
  • chord winding groove is formed on the outer periphery of the inner needle, when the outer needle is inserted along the inner needle, the tissue taken into the chord winding groove contacts the groove wall. Since it does not shift in the direction of the distal end of the inner needle, the tissue taken in a large amount into the chord winding groove can be collected as it is.
  • a circumferential groove is formed at the rear end portion of the inner needle, and a notch for sandwiching the circumferential groove is formed in the support member, and the inner needle is freely rotatable at the notch.
  • the inner needle is supported so as not to come out from the notch. Accordingly, the inner needle can be smoothly advanced and rotated when the inner needle is inserted into the tissue, and the inner needle can be smoothly retracted when the inner needle is extracted from the tissue. Further, the inner needle can be easily attached to and detached from the holder simply by removing the support member.
  • the groove is characterized in that a blade is formed at the edge and a barb is formed inside the edge.
  • a holder for holding an outer needle comprising a support member that supports the inner needle so that the inner needle can move straight in the axial direction and can rotate about the axis. Further, the support member is formed with a notch for sandwiching a circumferential groove formed at a rear end portion of the inner needle, so that the inner needle can be freely rotated by the notch, and The inner needle is supported so as not to come out from the notch.
  • the biopsy needle according to the present invention includes an inner needle and an outer needle into which the inner needle is inserted into the tissue, and then only the inner needle is further inserted, and then the outer needle is moved along the inner needle.
  • a biopsy needle that takes in a part of the tissue between the inner needle and the outer needle by further piercing and collects a part of the tissue taken out by pulling out the inner needle and the outer needle from the tissue
  • the inner needle has a tip portion formed in a pointed shape and a chord winding groove portion formed rearward from the tip portion.
  • the tip portion of the inner needle is formed in a pointed shape, when entering the tissue, it can smoothly enter without damaging the tissue. Furthermore, since the chord winding groove is formed on the outer circumference of the inner needle, the inner needle can enter the tissue while automatically rotating. That is, the axial force received from the tissue when the inner needle enters the tissue is divided into the circumferential force at the edge of the chord winding groove, so that the inner needle is automatically Rotate to. Accordingly, a large amount of tissue can be continuously taken into the string winding groove. In addition, since the chord winding groove is formed on the outer periphery of the inner needle, when the outer needle is inserted along the inner needle, the tissue taken into the chord winding groove contacts the groove wall. Since it does not shift in the direction of the distal end of the inner needle, the tissue taken in a large amount into the chord winding groove can be collected as it is.
  • the groove is characterized in that a blade is formed at the edge and a barb is formed inside the edge.
  • the biopsy needle device As described above, by using the biopsy needle device, the holder, and the biopsy needle according to the present invention, a plurality of tissues at the same site can be collected, and a larger amount of tissue can be collected, thereby further reducing the burden on the patient.
  • (A) is a plan view showing the holder of the biopsy needle device of the embodiment of the present invention
  • (B) is a plan view showing a state in which the holder cover is removed
  • (C) is an AA view of (A). It is a line sectional side view.
  • (A) is a top view which shows the support member which supports the inner needle and inner needle of the biopsy needle device of embodiment of this invention
  • (B) is a perspective view of a support member.
  • (A), (B) is the top view and side view which show the biopsy needle pulling nail which draws in the inner needle and the outer needle of the biopsy needle device of embodiment of this invention. It is a figure which shows the moving piece of the holder of FIG.
  • FIGS. 1 are views showing a biopsy needle main body of the holder of FIG. 1, wherein FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along line BB in FIG. It is a figure which shows the spring bottom member of the holder of FIG. 1, (A) is a top view, (B) is a front view, (C) is a right view.
  • FIGS. 1 are views showing a biopsy needle main body of the holder of FIG. 1, wherein FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along line BB in FIG. It is a figure which shows the spring bottom member of the holder of FIG. 1, (A) is a top view, (B) is a front view, (C) is a right view.
  • FIG. 2A and 2B are a plan view and a cross-sectional view taken along line AA of a biopsy needle attached to the holder of FIG. (A)-(D) It is a figure for demonstrating the use condition of the biopsy needle apparatus of embodiment of this invention.
  • (A)-(C) are the figures for demonstrating the use condition of a biopsy needle.
  • FIG. 1A is a plan view showing a holder of a biopsy needle device according to an embodiment of the present invention
  • FIG. 1B is a plan view showing a state in which a holder cover is removed
  • FIG. FIG. FIG. 2A is a plan view showing an inner needle and a support member that supports the inner needle of the biopsy needle device according to the embodiment of the present invention
  • FIG. 2B is a perspective view of the support member.
  • 3A and 3B are a plan view and a side view showing a biopsy needle pulling claw for drawing the inner needle and the outer needle of the biopsy needle device according to the embodiment of the present invention.
  • the biopsy needle device includes a holder 10 shown in FIG. 1 and a biopsy needle 1 composed of an inner needle 2 shown in FIG. 2 and an outer needle 3 shown in FIG.
  • the holder 10 includes a movable piece 100, a biopsy needle main body 200, a biopsy needle pulling claw 300, and a spring bottom member 400.
  • the movable piece 100 is slidably attached to the biopsy needle main body 200 and is pulled by the biopsy needle pulling claw 300.
  • the spring bottom member 400 adjusts the restoring force of the coil spring 12 that presses the outer needle.
  • the inner needle 2 has a tip portion 21 formed in a pointed shape, and two string-wound groove portions formed on the outer periphery from the tip portion 21 toward the rear. 22, a rear end portion 26 having a pointed shape, and a circumferential groove 27 formed with a predetermined distance from the rear end portion 26. Details of the distal end portion 21 and the groove portion 22 of the inner needle 2 will be described later.
  • the support member 500 includes a front wall 501, a rear wall 502, a top plate 503 that connects these walls 501 and 502, and a top plate 503. And a knob 504 protruding upward from both sides.
  • the front wall 501 is formed with a notch 501a that is cut from the lower end to substantially the center so that the circumferential groove 27 of the inner needle 2 is sandwiched (FIG. 2A). Then, with the circumferential groove 27 sandwiched in the notch 501a, the rear end portion 26 formed in the shape of a point of the inner needle 2 comes into contact with the inner surface of the rear wall 502 (FIG. 2 ( A)).
  • the biopsy needle pulling claw 300 includes an operation unit 301 and an operation rod 302, and the front wall 501 and the rear wall 502 of the support member 500 are fitted into the operation unit 301.
  • a prismatic slot 304 is formed, and a hook portion 303 is formed at the tip of the operation rod 302.
  • a through hole 306 through which the rear end portion 26 of the inner needle 2 is inserted is formed in the front wall 305 that defines the slot 304.
  • the circumferential groove 27 of the inner needle 2 is sandwiched in the notch 501a of the front wall 501, and the rear end portion 26 of the inner needle 2 is brought into contact with the inner surface of the rear wall 502.
  • the inner needle 2 is supported by the notch 501a of the support member 500 so as to be rotatable and not coming out of the notch 501a. Therefore, when the user presses the operation portion 301 of the biopsy needle pulling claw 300 to the left, the inner needle 2 moves straight to the left and rotates around the axis by the action described later. Further, by pulling the operation part 301 of the biopsy needle pulling claw 300 in the right direction, the inner needle 2 advances straight in the right direction.
  • the movable piece 100 includes a cylindrical portion 101 and a flat portion 102 as shown in FIGS.
  • a rib 103 that supports one end of the coil spring 12 is formed on the inner peripheral surface of the cylindrical portion 101.
  • a longitudinal groove 104 into which the hook portion 303 of the biopsy needle pulling claw 300 is inserted is formed on the back surface of the flat portion 102 in the length direction of the flat portion 102.
  • a plurality of side grooves 105 a, 105 b, 106 a, 106 b, 107 a, 107 b are formed on both sides of the vertical groove 104 in the length direction.
  • An attachment portion 108 for detachably attaching a hub integrated with the outer needle 3 is formed at the tip of the movable piece 100 (left end in FIG. 4).
  • the biopsy needle main body 200 is formed on both sides of the substrate 201 on which the movable piece 100 is placed and the substrate 201, and an operator inserts a finger when operating the biopsy needle. And a finger hole portion 202 to be used.
  • a longitudinal groove 203 into which the operation rod 302 of the biopsy needle pulling claw 300 is inserted is formed in the substrate 201 in the length direction of the substrate 201.
  • a U-shaped slit 204 is formed in the substrate 201, and a tongue portion 205 surrounded by the slit 204 is formed like a cantilever spring and can be deformed up and down.
  • Claws 206a and 206b are formed on both sides of the tongue 205, and a slope 207 is formed between the claws. By pushing the slope 207, the claws 206a and 206b are lowered in the direction indicated by the arrow in FIG.
  • the spring bottom member 400 includes a shaft portion 401 that passes through the center of the coil spring 12, a spring bottom plate 402 that is connected to the shaft portion 401 and abuts one end of the coil spring 12, and a spring that is connected to the spring bottom plate 402. It comprises a locking member 403 for positioning the bottom plate 402.
  • a through hole 401 a through which the inner needle 2 passes is formed at the center of the shaft portion 401.
  • the locking member 403 is provided on both sides of the shaft portion 401, and protrusions 403 a and 403 b for positioning the spring bottom member 400 are formed on each locking member 403. Both end portions of the spring bottom plate 402 are slidably assembled to the biopsy needle main body 200.
  • Each locking member 403 is formed with locking holes 405a and 405b for locking each end of the V-shaped spring 404 shown in FIG.
  • the V-shaped spring 404 has an effect of increasing the elastic force of each locking member 403 by acting to expand each locking member 403. Further, a pushing portion 406 is formed at the rear end of each locking member 403.
  • the upper part and the side part of the biopsy needle main body 200 are covered with a cover 210 as shown in FIGS.
  • Windows 211 are formed on both sides of the cover 210, and both ends of the locking member 403 and the spring bottom plate 402 are exposed from the window 211.
  • Windows 212 are formed on both sides of the front side of the cover 210 (left side in FIG. 1), and a release button 410 projects from each window 212.
  • Claws 213 a and 213 b projecting inward are formed on the inner surface of the cover 210 next to the release button 410.
  • the release button 410 is formed with a flange 410a so that it does not fall off the window 212.
  • the release button 410 is always urged outward by a leaf spring (not shown).
  • the biopsy needle 1 includes an inner needle 2 and an outer needle 3 into which the inner needle 2 is inserted, as shown in FIGS.
  • the inner needle 2 has a tip portion 21 formed in a pointed shape, two string-like groove portions 22 formed on the outer periphery rearward from the tip portion 21, and a pointed shape.
  • a rear end portion 26 and a circumferential groove 27 formed at a predetermined distance from the rear end portion 26 are formed.
  • the tip 21 is formed in a conical shape having an acute apex angle.
  • the groove portion 22 has a substantially U-shaped cross section and is formed in a spiral shape extending in the axial direction.
  • the groove 22 has a blade 23 formed at the edge and a turn 24 formed inside the edge.
  • a relief 25 is formed between the groove portion 22 and the groove portion 22 on the outer periphery of the inner needle 2.
  • the outer needle 3 has a cylindrical shape having an inner diameter slightly larger than the outer diameter of the inner needle 2, and the tip portion 31 is formed in a truncated cone shape having an acute apex angle. Since the rear end portion 26 and the circumferential groove 27 have been described above, description thereof will be omitted.
  • the operation method of the biopsy needle device in such a configuration will be described.
  • the rear end portion 26 of the inner needle 2 is inserted from the through hole of the mounting portion 108 of the movable piece 100, and further inserted into the slot 304 from the through hole 306 of the biopsy needle pulling claw 300.
  • the knob 504 of the support member 500 is picked to fit the front wall 501 and the rear wall 502 into the slot 304.
  • the groove width of the circumferential groove 27 of the inner needle 2 is formed to be larger than the thickness of the front wall 305 of the biopsy needle pulling claw 300 and the front wall 501 of the support member 500, and the circumference of the inner needle 2 is further increased.
  • the inner needle 2 Since the groove 27 is sandwiched by the notch 501a of the front wall 501, the inner needle 2 is supported so as to be rotatable without friction at the notch 501a and not to be removed from the notch 501a. Subsequently, the outer needle 3 is put so as to cover the distal end portion 21 of the inner needle 2, and the hub integrated with the outer needle 3 is half-rotated by the attaching portion 108 and locked.
  • this biopsy needle device can be set in two stages: a long stroke that can collect a large amount of tissue and a short stroke that can collect a small amount of tissue.
  • the long stroke will be described.
  • FIG. 8A from the state where the coil spring 12 is fully extended, as shown in FIG. 8B, the operation portion 301 is pulled to set the inner and outer needles 2 and 3.
  • the inner needle 2 supported by the operation portion 301 is also retracted, and at the same time, the hook portion 303 pulls the rear end 109 of the movable piece 100 to retract the outer needle 3.
  • the movable piece 100 is moved until the claws 206a and 206b of the biopsy needle main body 200 are engaged with the side grooves 105a and 105b of the movable piece 100, respectively. Thereby, the coil spring 12 is compressed.
  • the inner and outer needles 2 and 3 are inserted into the tissue 5, and only the inner needle 2 is inserted into the tissue 6 to be collected.
  • the inner needle 2 is further inserted into the tissue 6.
  • the inner needle 2 can smoothly enter the tissue 6 without damaging the tissue 6.
  • the inner needle 2 is inserted into the tissue 6 to be collected for a predetermined distance.
  • the chord winding groove 22 is formed on the outer periphery of the inner needle 2, the inner needle 2 can enter the tissue 6 while automatically rotating.
  • the axial force F received from the tissue 6 when the inner needle 2 enters the tissue 6 is orthogonal to the edge at the edge of the chord winding groove 22. Since the force F1 is divided into the force F2 along the edge, and the force F1 is further divided into the axial force F3 and the circumferential force F4, the inner needle 2 is automatically moved by this component force F4. Rotate. Therefore, a large amount of the tissue 61 indicated by the mesh line can be continuously taken in the groove portion 22 shown in FIG. Further, since the edge 23 of the groove 22 is formed with the blade 23, the inner needle 2 can cut into the tissue 6 and smoothly enter the tissue 6.
  • a barb 24 is formed inside the edge of the groove 22, the movement of the tissue 61 taken into the groove 22 is hindered by the barb 24 and prevents the tissue 61 from jumping out of the groove 22. be able to.
  • a relief 25 is formed between the groove portion 22 on the outer periphery of the inner needle 2, the inner periphery of the outer needle 3 is inserted when the outer needle 3 is inserted into the tissue 6 along the inner needle 2. And the frictional resistance between the inner needle 2 and the outer periphery of the inner needle 2 can be reduced.
  • tissue 61 which extracted the inner needle 2 and the outer needle 3 together from the holder 10, and took in in the groove part 22 is extract
  • the inner needle 2 including the outer needle 3 with respect to the holder 10 can be easily attached / detached by removing the support member 500 from the slot 304 of the biopsy needle pulling claw 300 and unlocking the hub integrated with the outer needle 3. Can do. Therefore, the used biopsy needle 1 is discarded and the holder 10 can be reused.
  • the short stroke will be described.
  • the pushing portion 406 of the spring bottom member 400 is moved forward.
  • the locking member 403 moves in the same manner, and the protrusions 403a and 403b engage with the claws 213a and 213b, respectively, to be locked and the coil spring 12 is raised (compressed).
  • the biopsy needle pulling claw 300 is pulled to set the inner and outer needles 2 and 3, but when the stroke is short, the claws 206a and 206b of the biopsy needle main body 200 are moved to the side grooves 106a and 206a of the movable piece 100.
  • the inner and outer needles 2 and 3 are set when they are respectively engaged with 106b.
  • the degree of compression of the coil spring 12 is the same as that during the long stroke, and thus the restoring force of the coil spring 12 is the same as that during the long stroke. Further, the coil spring 12 is in a state of being almost compressed in that state, and is set so that the biopsy needle pulling claw 300 cannot be pulled any more.
  • the inner and outer needles 2 and 3 are inserted into the tissue 5, and only the inner needle 2 is inserted into the tissue 6 to be collected.
  • the operation unit 301 is pressed, the inner needle 2 is further inserted into the tissue 6.
  • the operation rod 302 pushes the inclined surface 207 and the claws 206a and 206b are lowered.
  • the movable piece 100 is unlocked and is instantaneously moved to the original position by the restoring force of the coil spring 12.
  • the outer needle 3 is also moved. A portion of the tissue that protrudes into the groove 22 is cut off.
  • the effect of the inner needle 2 at this time is the same as in the case of a long stroke.
  • the release button 410 When the release button 410 is pushed to the main body side, the locking member 403 is pushed, the protrusions 403a and 403b move inward and come off from the claws 213a and 213b, and the spring bottom member 400 returns to the initial position.
  • the angle ⁇ between the straight line parallel to the rotation axis of the inner needle 2 and the edge of the groove 22 shown in FIG. 7A is preferably in the range of 15 to 60 °.
  • the angle ⁇ is more preferably in the range of 25 to 50 °.
  • the inner needle 2 automatically rotates due to the force received from the tissue when the inner needle 2 enters the tissue. As a result, there is an advantage that a large amount of tissue can be continuously taken into the groove 22. When the angle ⁇ is 50 ° or less, this effect becomes more remarkable.
  • the outer diameter ⁇ of the inner needle 2 is preferably in the range of 0.4 to 3.0 mm.
  • the outer diameter ⁇ is 0.4 mm or more, there is an advantage that a large number of inner needles can be produced by a normal technique.
  • a patient's burden can be reduced as the outer diameter (phi) is 3.0 mm or less.
  • the ratio (L / ⁇ ) between the width L of the groove portion 22 and the outer diameter ⁇ of the inner needle 2 is within a range of 0.5 or more.
  • the ratio (L / ⁇ ) is more preferably in the range of 0.8 or more.
  • the distance from the rotation axis of the inner needle 2 to the deepest part of the groove 22 is defined as the groove bottom height, and the distance obtained by subtracting the groove bottom height from the outer radius ( ⁇ / 2) of the inner needle 2.
  • the ratio (D / ( ⁇ / 2)) between the groove depth D and the outer radius ( ⁇ / 2) is preferably in the range of 0.20 to 0.45.
  • the ratio (D / ( ⁇ / 2)) is more preferably in the range of 0.25 to 0.35.
  • the inner needle 2 is supported so as to be rotatable at the notch 501a of the support member 500 and not to be removed from the notch 501a. It may be a structure. Further, the inner surface of the rear wall 502 of the support member 500 is formed flat, and the rear end portion 26 of the inner needle 2 that contacts the inner surface of the rear wall 502 of the support member 500 is formed in a pointed shape. The shape of the support member 500 and the rear end portion 26 of the inner needle 2 is not particularly limited as long as the resistance during rotation is small and the inner needle 2 can rotate.
  • a pointed protrusion may be provided on the inner surface of the rear wall 502 of the support member 500, and the rear end portion of the inner needle 2 contacting the pointed protrusion may be formed flat.
  • the holder 10 is configured to pierce the biopsy needle 1 in two stages, but may be configured to pierce the biopsy needle 1 in one stage or three or more stages.
  • two grooves 22 are formed, one groove may be used.
  • a test for determining the DNA of the patient can be performed.
  • the edge 23 of the groove portion 22 may not be formed with the blade 23.
  • the relief 25 may not be formed between the groove 22 on the outer periphery of the inner needle 2 and the groove 22.
  • the outer needle 3 when the outer needle 3 is inserted into the tissue 6 along the inner needle 2, it is preferably performed automatically as described above, but may be performed manually.
  • the axial force F received from the tissue 6 when the inner needle 2 enters the tissue 6 is orthogonal to the edge at the edge of the chord winding groove 22.
  • Force F1 and force F2 along the edge, and force F1 is further divided into axial force F3 and circumferential force F4.
  • the method of rotating the inner needle 2 is not limited to this method.
  • a groove similar to the groove portion 22 is provided on the side of the inner needle 2 on the rear end portion 26 side of the portion where the groove portion 22 is formed, and the protrusion is fixed independently of the groove and engages with the groove. Provide a part.
  • the groove may be provided continuously with the groove 22 or may be provided separately from the groove 22.
  • the inner needle 2 may be rotated by using a power source.
  • the present invention has industrial applicability not only as a biopsy needle for collecting tissue but also as a sampling inspection needle for foods and the like.

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Abstract

L'invention porte sur un dispositif d'aiguille de biopsie, un support et une aiguille de biopsie qui peut collecter de multiples tissus à partir de la même partie et peut collecter une quantité accrue de tissus. L'invention porte sur un dispositif d'aiguille de biopsie qui comporte un élément support (500) pour supporter une aiguille interne (2) de telle sorte que l'aiguille interne (2) peut avancer de façon rectiligne dans la direction de l'axe et peut tourner autour de l'axe. La pointe (21) de l'aiguille interne a une forme pointue acérée et il en résulte que l'aiguille interne peut entrer doucement dans le tissu sans endommager le tissu. Egalement, une section de rainure en forme d'hélice (22) est formée dans la périphérie externe de l'aiguille interne, et il en résulte que l'aiguille interne peut entrer dans le tissu tout en tournant automatiquement. Grâce à ceci, l'aiguille interne peut capturer de multiples tissus de la même partie dans la rainure et peut capturer en continu une quantité accrue de tissus. Egalement, les tissus capturés dans la rainure sont en contact avec la paroi de rainure et ne sont pas déplacés dans la direction vers la pointe de l'aiguille interne, et il en résulte que la quantité accrue de tissus capturés dans la rainure en forme d'hélice peut être collectée dans l'état.
PCT/JP2010/061354 2009-07-04 2010-07-03 Dispositif d'aiguille de biopsie, support et aiguille de biopsie WO2011004776A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010532762A JPWO2011004776A1 (ja) 2009-07-04 2010-07-03 生検針装置、ホルダ及び生検針

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2009159373 2009-07-04
JP2009-159373 2009-07-04
JP2009159374 2009-07-04
JP2009-159374 2009-07-04

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WO2011004776A1 true WO2011004776A1 (fr) 2011-01-13

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Cited By (6)

* Cited by examiner, † Cited by third party
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JP2017500085A (ja) * 2013-11-20 2017-01-05 コヴィディエン リミテッド パートナーシップ 生検ツールを標的場所にナビゲートし、生検ツールを使用して組織サンプルを採取するためのデバイス、システム、および方法
CN108354657A (zh) * 2018-02-26 2018-08-03 温州市中心医院 骨穿刺活检针
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US10806435B2 (en) 2012-08-03 2020-10-20 Bibbinstruments Ab Endoscopic biopsy instrument and method for taking a biopsy sample with helical cutting edge provided at the tip of a guidewire
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CN111658019A (zh) * 2020-06-30 2020-09-15 南京康友医疗科技有限公司 活检针及其取样方法

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