JP2010000226A - Puncture assisting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a puncture assisting device having versatility applicable to various individual differences, having a large freedom degree with respect to a puncture location and accurately and simply performing a puncture. <P>SOLUTION: This puncture assisting device is provided with an annular member formed of a hard material into an annular shape, an annular tube fixed to the internal diameter section of the annular member and formed from an elastic body changeable of its shape by injection and outflow of liquid into the interior, and a fixing belt for mounting the annular member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a puncture assisting device that is used by being attached to a subject when performing biopsy by puncturing the subject with a puncture needle.

  Conventionally, when performing a biopsy to extract the tissue inside the breast with a puncture needle, the operation is advanced while confirming the position of the affected area and the puncture needle with an ultrasonic tomography apparatus. The breast is flexible and easily deforms variously under the influence of gravity. For this reason, when puncturing, it is necessary to restrain the breast so that the puncture target does not move carelessly.

As a puncture assisting device for restraining the breast, there is known a puncture assisting device which is an object having a shape that flexibly follows an object and includes a suction port for sucking gas and a puncture hole through which a puncture needle passes. (For example, refer to Patent Document 1).
JP 2002-301074 A

  However, a device that covers a breast with a bowl-shaped object such as the puncture assisting device described in Patent Document 1 has a problem that it is not versatile due to differences in size and shape based on individual differences. In the case of suction from the nipple, there is a problem that it is difficult to puncture when there is an affected part directly under the nipple. Furthermore, although there are a plurality of puncture holes, there are various puncture locations, and there is a problem that the degree of freedom of the puncture position is narrowed.

  In view of the above problems, the present invention provides a puncture assisting device that has versatility applicable to various individual differences, has a large degree of freedom with respect to a puncture position, and can perform puncture accurately and easily. It is intended.

  The above object is achieved by the invention described below.

  (1) A puncture assisting device for performing biopsy by puncturing a subject with a puncture needle, a ring-shaped member formed in a ring shape from a hard material, and fixed to an inner diameter portion of the ring-shaped member, A puncture assisting device comprising: an annular tube formed in an annular shape with an elastic body capable of changing its shape by injecting and outflowing fluid; and a fixing belt for mounting the annular member.

  (2) The puncture assisting device according to (1), wherein the fixing belt is worn around the bed or the chest of the subject.

  (3) The annular tube is formed so that the shape change in the inner diameter direction and the direction away from the subject is larger than the shape change in the direction toward the subject. (1) or (2) Puncture aids.

  (4) The annular tube is made of a material having a tensile elastic modulus in the range of 0.1 to 10 MPa, and is formed such that the shape change in the inner diameter direction is larger than the shape change in other directions. The puncture assisting device according to (1) or (2), wherein the puncture assisting device is capable of expanding up to 800%.

  (5) The puncture assisting device according to any one of (1) to (4), wherein the ring-shaped member has an attachment portion to which an ultrasonic probe can be attached.

  (6) The puncture assisting device according to (5), wherein an angle of attachment of the ultrasonic probe to the ring-shaped member can be changed.

  (7) A pressure sensor capable of measuring a pressure of at least 9 to 23 kPa is provided on the inner diameter side of the annular tube, and is used within a range of 9 to 23 kPa of pressure on the breast of the annular tube (1 The puncture assisting device according to any one of) to (6).

  (8) The puncture assisting device according to any one of (1) to (7), wherein the pressure sensor is a vinylidene fluoride film or a titanic acid film.

  According to the present invention, it is possible to obtain a puncture assisting device that has versatility applicable to various individual differences, has a high degree of freedom with respect to a puncture position, and can perform puncture accurately and simply. It becomes.

  Hereinafter, the present invention will be described in detail with reference to embodiments, but the present invention is not limited thereto.

  FIG. 1 is a front view showing a schematic configuration of a puncture assisting device 1 according to the present embodiment. The figure schematically shows a state in which the puncture assisting device 1 is attached to the subject M.

  As shown in the figure, the puncture assisting device 1 according to the present embodiment includes an outer ring-shaped member 11 slightly larger than the breast, an annular tube 12 fixed to the inner diameter portion of the ring-shaped member 11, and the ring-shaped member 11. And a fixing belt 14 that is worn around the chest of the subject. An ultrasonic probe 20 is attached to the ring-shaped member 11.

  The fixing belt 14 may be configured so as to go around the bed, and the subject lies between the bed and the puncture assisting device 1.

  The ring-shaped member 11 is made of, for example, a metal such as aluminum, stainless steel, brass, or a resin material such as PMMA (polymethyl methacrylate), PC (polycarbonate), PP (polypropylene), and is formed in a shape that does not easily deform. Yes.

  The ring-shaped member 11 is tubular, and a lateral groove portion 11y is formed on the outer peripheral side, and a longitudinal groove portion 11t connected to the lateral groove portion 11y is formed at a predetermined angular interval (in increments of 60 degrees in the drawing). The position where the ultrasonic probe 20 is attached can be changed by moving the ultrasonic probe 20 along the lateral groove 11y. Moreover, in the longitudinal groove part 11t, the attachment angle with respect to the annular member 11 of the ultrasonic probe 20 can be changed.

  The ring-shaped tube 12 is ring-shaped and is made of styrene butadiene rubber, butadiene rubber, isoprene rubber, chloroprene rubber, chloroprene acrylo rubber, nitrile butadiene rubber, butyl rubber, ethylene polypropylene rubber, urethane rubber, silicon rubber, fluorine rubber, chlorinated polyethylene, Elastic bodies such as sulfurized rubber, acrylic rubber, epichlorohydrin rubber, natural rubber having a cis 1-4 polyisoprene main structure and synthetic natural rubber natural rubber are preferably used. Further, at least one kind of all of the above rubber compositions may be mixed and used. Since the surface of a rubber product is often rich in adhesiveness, the surface thereof may be subjected to a chlorination treatment, a method of applying talc powder, or an adhesion prevention treatment by hydrogel coating.

  In the hydrogel coating method, a hydrogel polymer that is a copolymer of 2-hydroxyethyl methacrylate and methacrylic acid and / or 2-ethylhexyl acrylate and a curing agent are applied, and the hydrogel is bonded to a rubber film by a thermosetting reaction. May be.

  Alternatively, a hydrophobic monomer or a water-soluble monomer may be immersed on the annular tube, the monomer as a hydrogel raw material may be polymerized by the action of radiation on the surface, and the hydrogel may be coated on the rubber tube. Good. The monomer to be used is a mixed monomer of a hydrophobic monomer and a water-soluble monomer, and the surface can be modified by uniformly applying it to the rubber film surface and irradiating with a low energy electron beam.

  The hydrophobic monomer has a solubility in water at room temperature of 10 g / 100 g or less, and includes the following. Examples thereof include ethyl acrylate, n-propyl acrylate, n-butyl acrylate, i-butyl acrylate, 2-ethylhexyl acrylate, methylaminoethylminoethyl methacrylate, diethylaminoethyl methacrylate and the like.

  The water-soluble monomer has a solubility in water at room temperature of 10 g / 100 g or more, and includes the following. Acrylic acid, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, meta N-vinylpyrrolidone, methoxyethylene glycol methacrylate, methoxypropylene methacrylate Glycol, methoxypolyethylene glycol methacrylate, methoxyethylene glycol acrylate, methoxypropylene glycol acrylate, methoxypolyethylene glycol acrylate, polyethylene glycol dimethacrylate, and polyethylene glycol diacrylate.

  The composition ratio that can improve the adhesiveness of rubber and does not cause discomfort before forming the hydrogel film is preferably 20% to 50% by weight of water-soluble monomer and 50% to 80% by weight of hydrophobic monomer.

  If the hydrogel film can be formed with a dose as low as possible, surface treatment can be performed in a short time, which is preferable because productivity increases.However, if the dose is low, unreacted monomer that does not polymerize remains, so the amount of unreacted monomer after irradiation remains. It takes a long time to remove. For this reason, it is preferable to select a dose at which the monomer is polymerized close to 100%. This dose varies depending on the combination of water-soluble monomer and hydrophobic monomer and the composition ratio, but is preferably 30 kGy to 60 kGy.

  When using an electron beam, an electron beam from a low energy electron accelerator is preferred. As the low energy electron accelerator, an electron accelerator having an acceleration voltage of 500 kV or less and a commercially available beam current of 5 to 300 mA can be used. In addition, as a molding method of the rubber composition, extrusion, extraction, dipping, mold molding, and rolling methods may be used.

  The shape change in the inner diameter direction of the annular tube and the direction away from the subject is preferably in the range of the shape before the shape change (reference is 100%) to the volume change shape of 800%. The volume can be increased by injecting the fluid, but if it is increased to 800% or more, it is not preferable from the viewpoint of durability. Excessive expansion causes cracking or damage to the rubber, and it takes time to inject a fluid for expansion, so that operability is also deteriorated.

  Various additives can be blended in order to adjust the elastic modulus and extension degree of the annular tube. The blending ratio of the additive is determined by a combination of the degree of stretching and the initial tensile stress, but when a large change in stretching elasticity or a large change in elongation is required, the blending amount of the fibrous additive should be increased. Selected. However, if the amount is too large, a force is required to insert the fluid, and workability deteriorates.

  From the viewpoint of operability, the ring-shaped tube of the present invention preferably has a stretch elastic modulus with a tensile strength of 0.1 to 10 MPa. If the lower limit of this range is not reached, there is a risk of damage rupture, and if the upper limit of this range is exceeded, the energy for fluid flow increases and the operability becomes poor.

  Since the ring-shaped tube 12 is hollow and formed of an elastic body, the ring-shaped tube 12 is expanded by injecting a fluid such as air into the inside and restored to the original shape by the outflow of the fluid.

  The air is injected into the annular tube 12 by using the pressurizer 15 to inject the air into the annular tube 12.

  The ring-shaped member 11 and the ring-shaped tube 12 are preferably fixed firmly by bonding, fixing with a hook, fixing with a clasp, or the like.

  Moreover, although the example of the manual pressurizer was demonstrated, not only this but you may make it inject | pour air automatically with an air pump etc., the simple pressure cylinder below 1MPa etc. which fills air with a bicycle etc. It may be used.

  FIG. 2 is a cross-sectional view showing an example of the annular member 11 and the annular tube 12. This figure is a cross-sectional view taken along line AA shown in FIG. FIG. 2A shows a state when the pressure of the hollow portion of the annular tube 12 is the same as the atmospheric pressure, and FIG. 2B shows a deformed state when air is injected into the hollow portion of the annular tube 12. .

  As shown in FIG. 5A, the surface 12f on the subject side of the annular tube 12 is formed thick, and the surface 12n on the inner diameter side and the surface 12h away from the subject are formed relatively thin. In order to extend in the inner diameter direction, it may be controlled by changing the thickness, but may be controlled by curing such as crosslinking. Crosslinking control may utilize the type and amount of the polymerization initiator and radiant energy such as electron beam, ultraviolet ray, and X-ray. An electron beam can be preferably used because it is easy to install but is simple.

  When air is injected into the hollow portion 12c of the annular tube 12 by the pressurizer 15, the inner surface 12n and the surface 12h away from the subject greatly expand outward as shown in FIG. The surface 12f on the direction side toward the surface hardly changes.

  That is, the annular tube 12 of the puncture assisting device shown in FIG. 2 is formed so that the shape change in the inner diameter direction and the direction away from the subject is larger than the shape change in the direction toward the subject.

  FIG. 3 is a cross-sectional view showing another example of the annular member 11 and the annular tube 12. This figure is also a cross-sectional view taken along line AA shown in FIG. FIG. 2A shows a state when the pressure of the hollow portion of the annular tube 12 is the same as the atmospheric pressure, and FIG. 2B shows a deformed state when air is injected into the hollow portion of the annular tube 12. .

  As shown in FIG. 6A, a core material 21 is embedded inside the surface 12f on the subject side of the annular tube 12, and the inner surface 12n and the surface 12h in the direction away from the subject are formed. Is molded from rubber only.

  When air is injected into the hollow portion 12c of the annular tube 12 by the pressurizer 15, the inner surface 12n and the surface 12h away from the subject greatly expand outward as shown in FIG. The surface 12f on the direction side toward the surface hardly changes.

  That is, the annular tube 12 of the puncture assisting device shown in FIG. 3 is formed so that the shape change in the inner diameter direction and the direction away from the subject is larger than the shape change in the direction toward the subject.

  FIG. 4 is a cross-sectional view showing another example of the annular member 11 and the annular tube 12. This figure is also a cross-sectional view taken along line AA shown in FIG. FIG. 2A shows a state when the pressure of the hollow portion of the annular tube 12 is the same as the atmospheric pressure, and FIG. 2B shows a deformed state when air is injected into the hollow portion of the annular tube 12. .

  As shown in FIG. 2A, the surface 12f on the subject side of the annular tube 12 and the surface 12h in the direction away from the subject are formed thick, and the surface 12n on the inner diameter side is formed relatively thin.

  When air is injected into the hollow portion 12c of the annular tube 12 by the pressurizer 15, only the inner surface 12n is greatly expanded outward as shown in FIG. And the surface 12h in the direction away from the subject hardly changes.

  That is, the annular tube 12 of the puncture assisting device shown in FIG. 4 is formed so that the shape change in the inner diameter direction is larger than the shape change in the direction away from the subject and the direction toward the subject.

  FIG. 5 is a sectional view showing the annular member 11 and the ultrasonic probe 20 attached to the annular member 11. This figure shows a section cut along the line CC shown in FIG. The annular tube 12 is shown in FIG.

  The ultrasonic probe 20 is supported by a probe support member 22. The probe support member 22 is integrated with a ball 21 having a diameter that fits with the inner diameter of the tubular portion of the ring-shaped member 11. Thereby, the position with respect to the ring-shaped member 11 can be changed by moving along the horizontal groove part 11y formed in the tubular part of the ring-shaped member 11. Further, in the longitudinal groove portion 11t, the probe support member 22 can be rotated in the direction of the arrow in the figure, and the attachment angle of the ultrasonic probe 20 with respect to the ring-shaped member 11 can be changed.

  The probe support member 22 has a male screw portion 22s. The probe support member 22 is fixed at a desired inclination by moving the female screw member 22n screwed into the male screw portion 22s to the ring-shaped member 11 side. Be able to.

  The probe support member 22 may be fixed at a desired angle by other methods, such as a method of tightening as a tapered shape or a method of inserting and fixing a pin.

  The use state of the puncture assisting device configured as described above will be described.

  FIG. 6 is a schematic diagram showing a use state of the puncture assisting device 1 according to the present embodiment. This figure shows a state in which the annular member 11 and the annular tube 12 are mounted around the breast B of the subject and air is injected into the annular tube 12 by a pressurizer. The annular tube 12 is the one shown in FIG.

  As shown in the figure, in the puncture assisting device 1 according to the present embodiment, the expansion deformation of the annular tube 12 is in the inner diameter direction and the direction away from the subject. Can be without. Moreover, the breast B can be shaped and fixed without discomfort by pressing the breast B in the inner diameter direction and the direction away from the subject.

  In this state, the angle of the probe support member 22 that supports the ultrasonic probe 20 with respect to the ring-shaped member 11 is adjusted and fixed. By enabling the angle adjustment of the ultrasonic probe 20, versatility applicable to various individual differences can be provided.

  It is preferable to use an ultrasonic probe 20 that can transmit and receive a frequency of 7.5 MHz to 25 MHz. In addition, it is preferable that various probe support members 22 having a size of about 6 × 4 to 3 × 2 cm are attached. As the ultrasonic diagnostic apparatus to which the ultrasonic probe 20 is connected, a device capable of harmonic signal processing, a device capable of spatial frequency compounding, a device capable of phase conjugate image processing, and the like can be used.

  After the target 27 which is a lesion detected by the ultrasonic diagnostic apparatus is determined, puncture is performed by the puncture needle 26 and tissue is collected.

Further, in this example, the pressure sensor 25 is disposed at a position in contact with the subject on the inner diameter side of the annular tube 12, and the pressure between the highest value and the lowest value of the subject's blood pressure is determined based on the output from the pressure sensor 25. Inflated and deformed. By doing in this way, it can be set as the preferable puncture assistance instrument which does not give a discomfort to a test subject. As the pressure sensor 25, for example, a titanic acid film or a vinylidene fluoride film that converts pressure into a current value can be used. Examples of titanate-based materials include barium titanate (BaTiO ₃ ), strontium titanate (SrTiO ₃ ), and a composite of lead titanate and zirconium titanate (so-called PZT). The vinylidene fluoride-based film contains 65 mol% or more of vinylidene fluoride homopolymer, vinylidene fluoride / 3 ethylene fluoride copolymer, vinylidene fluoride / 3 ethylene fluoride / alkyl ethylene fluoride, etc. It is a film of a copolymer with olefin monomers other than 2 to 4 types of vinylidene fluoride. The film means a thin film having a thickness of 1 μm to 10 mm, and the size and area are not particularly limited. The pressure sensor is a sensor for detecting an appropriate pressure for breast fixation, and the pressure that does not cause discomfort is preferably 9 to 23 kPa. If it is smaller than this value, fixing is not secure, which is not preferable. On the other hand, if it exceeds 23 kPa, unpleasant feeling of breast tightening is given to many subjects, which is not preferable.

  A preferable pressure sensor for the present invention is a polyvinylidene fluoride film type. As a manufacturing method of the pressure sensor of the present invention, first, a patterned plating resist is formed on a metal plate. This plating resist can be formed, for example, by laminating an ultraviolet-sensitive dry film resist on a metal plate, selectively exposing it using a negative film or the like, and then developing it. The material of the metal plate may be any material as long as it is suitable for this manufacturing method. In particular, the metal plate is resistant to the chemical used, and can be finally removed by etching. is required. Examples of the material of such a metal plate include copper and nickel.

  Resist metal is formed by electrolytic plating using the metal plate as a lead for electrolytic plating. By this electrolytic plating, a resist metal is formed in a portion on the metal plate where the plating resist is not formed. The resist metal material may be any material as long as it is suitable for this manufacturing method. In particular, it should be resistant to the chemical used when the metal plate is finally removed by etching. is there. Examples of the resist metal material include nickel, tin, silver, and palladium.

  Next, a wiring plate is formed by electrolytic plating using the metal plate as a lead for electrolytic plating. By this electrolytic plating, a wiring circuit is formed in a portion on the metal plate where the plating resist is not formed. As the material of the wiring circuit, since the wiring circuit finally exists inside the piezoelectric film, it is preferable to select a resist metal that can be etched with a chemical solution that does not erode or corrode the wiring circuit. Examples of the material for the wiring circuit include copper, nickel, tin, silver, and palladium. Copper is particularly preferred because it provides a low resistance and stable wiring circuit.

  Next, the plating resist is removed to obtain a metal plate on which a wiring circuit is formed. Two metal plates obtained in this way are prepared, the wiring circuit surfaces of the metal plates are arranged opposite to the front and back surfaces of the piezoelectric resin film, and the wiring circuit is embedded in the film. Crimp the metal plate so that

  As a method of crimping the metal plate, a method using a flat plate press or a roll laminator can be used. You may pressurize using a vacuum laminator, heating under reduced pressure. A method using both vacuum and heating can embed the wiring circuit in the film without a gap.

  Next, using a metal plate exposed on the front and back as an electrode, a high voltage is applied to polarize (poll) a piezoelectric resin film to develop the piezoelectricity. At this time, you may heat the whole in the range of 80-140 degreeC. The metal plate is removed by etching.

  Next, the resist metal is removed by etching to obtain a film-like pressure sensor. Since the wiring circuit has resistance to a chemical used when the resist metal is removed by etching, the wiring circuit is not eroded or corroded. Therefore, the wiring circuit is exposed by removing the resist metal. The wiring circuit can be formed in any shape, but is preferably arranged in a matrix in order to detect a minute pressure in the surface. For example, the linear patterns arranged in parallel on the front and back of the piezoelectric resin film are formed so as to intersect each other. More preferably, the intersecting portions are orthogonal. When pressure is applied to a point where the front and back patterns intersect with each other across a piezoelectric resin film, the piezoelectric film sandwiched between the two patterns generates a potential difference.

  In the above embodiment, the example of the puncture assisting device having the two annular members 11 has been described, but it is needless to say that the number of the annular members 11 may be one.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these.

Preparation of ring-shaped tube 70 g of natural rubber latex (rubber solid content 60%) was sampled, and 8 ml of 1% aqueous ammonia and 1 ml of 10% aqueous potassium hydroxide solution were added while stirring at a speed of 40 revolutions per minute. 1 part by mass of n-butyl acrylate was added to the latex and stirred for 3 hours. This was transferred to the mold shown in FIG. 2 (a), the mold was heated to 60 ° C., and γ rays from cobalt 60 were irradiated and grafted for 2 hours at a dose rate of 10 kGy / hour, followed by dry molding. The rubber tube molded body was immersed in a mixed monomer of 2-hydroxyethyl methacrylate 2 / n-butyl acrylate 8 at a mass ratio, immediately taken out, and irradiated with an electron beam at 60 kGy by a low energy accelerator. The elastic elasticity of the annular tube was 1 MPa. As a result of changing the tensile elastic modulus of the annular tube by changing the electron beam irradiation, performing air inflow and deaeration tests, and testing with a tensile elasticity tester, it was confirmed that the range of 0.1 MPa to 10 MPa was preferable.

Production of Pressure Sensor A dry film resist was roll-laminated on a 150 μm thick rolled copper plate having a roughened surface, exposed and developed using a predetermined negative film, and a plating resist necessary for forming a wiring circuit was formed. Next, using a rolled copper plate as an electrolytic plating lead, nickel was formed by electrolytic plating, and further electrolytic copper plating was performed to form 100 linear wiring circuits arranged in parallel at a pitch of 0.1 mm. The wiring circuit had a nickel thickness of 3 μm, a copper thickness of 10 μm, a width of an intersection portion of 45 μm, and a width of a connection portion between adjacent intersection portions of 20 μm.

  Next, a film of polyvinylidene fluoride / 3 fluorinated ethylene copolymer (75:25) having a thickness of 50 μm was prepared, and the two rolled copper plates with wiring circuits obtained above were connected to the wiring circuits on both sides of the film. Were placed so that the crossing portions of the wiring circuits were orthogonal to each other, and pressure bonding was performed at 135 ° C. and 3 MPa using a hot press. The obtained laminate was placed in a constant temperature bath at 62 ° C., and a rolled copper plate was used as an electrode, and a 230 V DC voltage was applied to both ends for 10 minutes to polarize the polyvinylidene fluoride film. Next, the rolled copper plates on both sides were removed by etching using an ammonia-based etchant, and nickel was removed by etching using a nickel release agent. When pressed with a force of about 9.3 kPa and 23 kPa, both pressures could be detected by processing the output signals obtained from each intersection.

  A ceramic type pressure sensor was made as another type of pressure sensor.

  As the piezoelectric ceramic powder, PNN (lead nickel niobate), PT (lead titanate), and PZ (lead zirconate) powders were used, and the molar ratio was 0.48PNN: 0.38PT: 0.14PZ. . This was mixed using PVB (polyvinyl butyral) to form a slurry, which was then applied to obtain a piezoelectric ceramic sheet having a thickness of about 60 μm.

  On this piezoelectric ceramic sheet, a platinum paste containing 18% by volume of the PNN-PT-PZ powder was applied by screen printing to an electrode having a film thickness of about 5 μm. The molded article was obtained by pressure bonding at 40 GPa pressure and holding in an electric furnace at 1150 ° C. in an atmosphere in the atmosphere, followed by baking heat treatment for about 3 hours. A 300 V DC voltage was applied to both electrodes of the obtained sensor sheet for 10 minutes for polarization treatment to impart piezoelectricity to obtain a sensor. The correlation between the output signal and pressure was taken and it was confirmed that the signal could be detected. In the test, it was confirmed that both were used to show equivalent performance.

Appropriate annular tube pressure test of the breast In order to determine the appropriate pressure of the breast with the above-mentioned pressure sensor, 20 subjects who were 35 to 45 years old were tested for a pressure tolerance test. A breast puncture assisting device was assembled and the pressure was changed to 29 kPa by air injection. The pressure sensor was installed so as to detect between the annular member 11 and the annular tube 12.

  The pressure tolerance test results are shown below.

(Test results)
Test pressure range Permissible number of people 0-20 kPa 20 people 0-21 kPa 19 people 0-23 kPa 18 people 0-25 kPa 5 people 0-27 kPa 3 people 0-29 kPa 1 person From the above results, it is almost acceptable if the breast pressure is up to 23 kPa I understand that I can do it.

  As described above, according to the present invention, there is versatility applicable to various individual differences, a large degree of freedom with respect to the puncture position, and puncture can be performed accurately and easily without causing discomfort to the subject. A puncture assisting device that can be implemented can be realized.

It is a front view which shows schematic structure of the puncture auxiliary device which concerns on this Embodiment. It is sectional drawing which shows an example of a ring-shaped member and a ring-shaped tube. It is sectional drawing which shows the other example of a ring-shaped member and a ring-shaped tube. It is sectional drawing which shows the other example of a ring-shaped member and a ring-shaped tube. It is sectional drawing which shows the ultrasonic probe attached to the annular member and the annular member. It is a schematic diagram which shows the use condition of the puncture assistance apparatus which concerns on this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Puncture auxiliary | assistance apparatus 11 Ring-shaped member 12 Ring-shaped tube 14 Fixed belt 15 Pressurizer 20 Ultrasonic probe 21 Ball 22 Probe support member 22s Male thread part 22n Female thread member 25 Pressure sensor 26 Puncture needle 27 Target B Breast M Subject

Claims (8)

A puncture assisting device for performing a biopsy by puncturing a subject with a puncture needle,
A ring-shaped member formed into a ring shape from a hard material, a ring-shaped tube fixed to the inner diameter portion of the ring-shaped member, and formed into a ring shape by an elastic body that can change its shape by injecting and outflowing fluid into the inside; A puncture assisting device, comprising: a fixing belt for mounting the ring-shaped member. The puncture assisting device according to claim 1, wherein the fixing belt is worn around the bed or the chest of the subject. The puncture assisting device according to claim 1 or 2, wherein the annular tube is formed such that a change in shape in an inner diameter direction and a direction away from the subject is larger than a change in shape in a direction toward the subject. The annular tube is made of a material having a tensile elastic modulus in the range of 0.1 to 10 MPa, and is formed such that the shape change in the inner diameter direction is larger than the shape change in the other direction, and 100 to 800% due to inflow / outflow of fluid. The puncture assisting device according to claim 1, wherein the puncture assisting device can be expanded. The puncture assisting device according to any one of claims 1 to 4, wherein the ring-shaped member has an attachment portion to which an ultrasonic probe can be attached. The puncture assisting device according to claim 5, wherein an angle of attachment of the ultrasonic probe to the ring-shaped member can be changed. A pressure sensor capable of measuring a pressure of at least 9 to 23 kPa is provided on the inner diameter side of the annular tube, and the pressure to the breast of the annular tube is used within a range of 9 to 23 kPa. The puncture assisting device according to any one of the above. The puncture assisting device according to any one of claims 1 to 7, wherein the pressure sensor is a vinylidene fluoride film or a titanic acid film.

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