WO2004071294A1 - 線状デバイス - Google Patents
線状デバイス Download PDFInfo
- Publication number
- WO2004071294A1 WO2004071294A1 PCT/JP2004/001669 JP2004001669W WO2004071294A1 WO 2004071294 A1 WO2004071294 A1 WO 2004071294A1 JP 2004001669 W JP2004001669 W JP 2004001669W WO 2004071294 A1 WO2004071294 A1 WO 2004071294A1
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- WIPO (PCT)
- Prior art keywords
- linear
- linear device
- layer
- conductive
- layers
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
- A61B2562/0215—Silver or silver chloride containing
Definitions
- the present invention relates to a linear device. More specifically, a living body is treated, and an electrical stimulus, a thermal stimulus, an optical stimulus is applied to the treated part, or a change occurring in the treated part is electrically, electrochemically or Can be measured optically
- an enzyme sensor in which a predetermined enzyme is attached to the surface of an electrode has been used to measure the concentration of sugar, amino acid, and the like in a living body.
- Such an enzyme sensor utilizes the property that an enzyme attached to an electrode generates a molecule or an ion by specifically oxidizing or reducing sugars or amino acids, and the amount of the generated molecule or ion is measured by the electrode.
- the concentration of sugar, amino acid, etc. can be measured by detecting the current value flowing through
- an enzyme sensor is a Darcos sensor that measures the glucose concentration in the body (conventional example 1: Japanese Patent Laid-Open No. 5-6072, conventional example 2: W. Kenneth Ward, Lawrence B. Jansen, El len Anderson, Gerard Reach, Jean-Claude Klein, George S. Wilson, "A new a erometric glucose microsensor: in vitro and short-term in vivo evaluat ion", Biosensors & Bioelectronics 17, 2002, p. 181 -189).
- Conventional example 1 Japanese Patent Laid-Open No. 5-6072
- conventional example 2 W. Kenneth Ward, Lawrence B. Jansen, El len Anderson, Gerard Reach, Jean-Claude Klein, George S. Wilson, "A new a erometric glucose microsensor: in vitro and short-term in vivo evaluat ion", Biosensors & Bioelectronics 17, 2002, p. 181 -189).
- the glucose sensor of Conventional Example 1 includes a rod-shaped titanium electrode and an insulating layer formed by a glass tube on the outer periphery thereof, and a silver plate electrode formed by winding a silver plate around the outer periphery of the insulating layer.
- a titanium oxide layer is formed by oxidizing the surface of the titanium electrode, and glucose oxidase is attached to the surface of the titanium oxide layer.
- the glucose sensor of Conventional Example 1 is inserted into the human body from its tip, or if the tip is immersed in blood in the blood vessel and a voltage is applied between the titanium electrode and the silver plate electrode, both electrodes Since a current corresponding to the glucose concentration flows between them, The glucose concentration can be measured.
- the glucose sensor of Conventional Example 2 includes an insulating layer formed of a Teflon tube around a rod-shaped platinum iridium alloy electrode, and a silver wire electrode formed by winding a silver wire around the outer periphery of the insulating layer. It is provided.
- This conventional glucose sensor of Example 2 also has protein adsorbed on the surface of a white iridium alloy electrode, and glucose oxidase is bonded to the protein adsorbing surface using dartalaldehyde as a cross-linking agent. Similar to the dull course sensor in Example 1, it is possible to measure the concentration of dalcos in living tissue or blood.
- the glucose sensor of Conventional Example 1 has a diameter of about 0.8 mm
- the glucose sensor of Conventional Example 2 has a diameter of at least 0.35 mm. For this reason, the number of cells that are destroyed when the glucose sensor is stabbed into the living body increases, and if it is left on the human body, there is a problem of feeling uncomfortable or painful at the treated site. If the diameter of the glucose sensor is reduced, the number of cells that can be destroyed can be reduced, and discomfort and pain can be reduced.
- the strength of the glucose sensor itself decreases, it cannot be inserted into the living body, or when inserted into the living body. The sensor may be bent due to resistance, and it may not be possible to take the desired position. And if it is bent in the living body, the sensor may lose its function due to a short circuit or breakage, or the damage to the living body may increase, resulting in great pain to the person.
- the glucose sensor since the glucose sensor has a large diameter and a large titanium oxide electrode, there is a problem that it cannot be used for examining the amount of dulcose in a minute region, for example, measuring changes in the amount of local glucose in the brain or the like. . Disclosure of the invention
- an object of the present invention is to provide a linear device that can be miniaturized, can be inserted into a desired position of an object, and can prevent damage to the object.
- a linear device is a linear member in which a plurality of layers are formed from the base layer toward the outer layer, extending in the axial direction, and the plurality of layers include a conductive layer and an insulating layer. And be prepared It is characterized by
- the first invention if two linear members are provided side by side and a voltage is applied between the conductive layers of the two linear members, an electric current can flow through the substance between the two, and electrical stimulation Can be given.
- the current value flowing between the conductive layers of the two linear members changes depending on the material between them, the type and amount of the substance existing between the two linear members from the current value Etc. can be detected.
- a linear device according to a second invention is characterized in that, in the first invention, a tip of the linear member is pointed.
- the resistance when inserting the linear member into an object such as a living body can be reduced.
- the area of contact between the conductive layer of the linear member and the object is reduced, a current can flow locally, and a substance present in a minute region can be detected and measured.
- the linear device of the third invention is the linear device of the first or second invention, wherein the conductive layer is formed on a side surface of the base layer, and the edge layer is formed so as to cover a surface of the conductive layer,
- a special feature is that a contact portion where the conductive layer is exposed is formed at a tip portion of the linear member.
- the area of contact between the conductive layer and the object can be adjusted by adjusting the area of the contact portion.
- the linear device according to a fourth invention is characterized in that, in the third invention, a platinum layer is formed on a surface of the contact portion.
- the fourth invention it is possible to prevent an object such as a living body from coming into contact with an iichiologically stable platinum layer and to prevent the conductive layer from coming into direct contact with the object. Then, since it is possible to prevent the organism and the like from being affected by the conductive layer, various materials can be used as the material of the conductive layer.
- a linear device according to a fifth invention is the linear device according to the first, second, third, or fourth invention, wherein the plurality of layers are provided between the plurality of conductive layers formed of a conductive material and the plurality of conductive layers. And a yarn edge layer.
- the fifth invention if a voltage is applied between the conductive layers at the other end of the linear member, a potential difference is generated between the conductive layers at one end of the linear member. For this reason, the other end of the linear member Can be inserted into or embedded in an object such as a human body, an electrical stimulus can be applied to the site, and the resistance value of a substance near one end can be measured. Moreover, since the member is linear, that is, elongated, and the space occupied by the linear member can be reduced when the member is inserted into the object, the sensor can be inserted and embedded in a human body or the like. When used, it can prevent people from feeling uncomfortable or painful.
- a linear device is characterized in that, in the first, second, third, fourth, or fifth invention, a material of one of the plurality of layers is a superelastic alloy.
- torque transmission is improved, and therefore, when a linear member is inserted into a living body or the like, the member can be prevented from being deformed or bent and damaged. Therefore, the linear member can be reliably treated at a desired position, and damage to the treated living body or the like can be prevented.
- a linear device according to a seventh invention is characterized in that, in the first, second, third, fourth, or fifth invention, a material of one of the plurality of layers is a superelastic resin.
- the linear member since the torque transmission property is improved, when the linear member is inserted into a living body or the like, it is possible to prevent the member from being deformed or bent and damaged. Therefore, the linear member can be reliably treated at a desired position, and damage to the treated living body or the like can be prevented.
- the spring-like device is characterized in that, in the first, second, third, fourth, fifth, sixth, or seventh invention, a material of one of the plurality of layers is a shape memory material. .
- a material of one of the plurality of layers is a shape memory material.
- the material of one layer is a shape memory material, it can be deformed into a predetermined shape when a predetermined temperature is reached. For this reason, for example, if a material that has a predetermined shape at the same temperature as the portion to be treated is used as the material of the linear member, it can be deformed to the predetermined shape at the place where the member has been treated. Moreover, it can be reliably maintained in its shape. Therefore, the tip of the member can be placed at a predetermined position on the object, so that electrical stimulation can be given to the object at an accurate position, and the resistance value of the substance at the predetermined position can be measured accurately. can do.
- a linear device of a ninth invention is characterized in that, in the first, second, third, fourth, fifth, sixth, seventh, or eighth invention, the width of the linear member is 1 to 200 xm.
- the linear member is very thin, the periphery of the portion where the member is treated The effect of the member on the tissues and substances of the body can be reduced, and even when it is placed in the living body, it is possible to prevent a person from feeling uncomfortable or painful.
- the linear device according to a tenth aspect of the present invention is the linear device according to the first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth aspect, wherein the linear member is disposed at the center and along the axial direction.
- a central axis part, and the central axis part is the base layer.
- the central shaft portion is formed at the center of the linear member, the strength of the linear member can be increased. Therefore, since it is possible to prevent the member from being deformed or damaged when the linear member is treated, the linear member can be reliably disposed at a desired position, and the measure is taken. Can be prevented from being damaged.
- a concentric layer is formed along the radial direction around the central axis.
- a linear device is the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth or tenth invention, wherein one end portion of the linear member includes the plurality of conductive layers. Among them, a detection substance that reacts with a predetermined substance to form a reaction substance is provided on the surface of one conductive layer.
- the predetermined substance when a voltage is applied between one conductive layer provided with the detection substance and the other conductive layer, the predetermined substance is present in the vicinity of the portion where one end of the linear member is treated. If present, the substance reacts with the detection substance to produce a reactive substance, or the oxygen isobaric force S decreases as the reactive substance is produced. Then, the amount of current flowing between one conductive layer and the other conductive layer and the potential difference change according to the generation amount and generation rate of the reactant, the decrease amount of oxygen, and the decrease rate. For this reason, the presence / absence of a predetermined substance and its amount / concentration can be detected by measuring changes in the amount of electric current or potential difference between one conductive layer and another conductive layer.
- a linear device is the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or tenth or eleventh aspect of the present invention.
- the axial direction of the linear member Are provided with an active region in which conductive portions and insulating portions are alternately arranged from one end thereof, and the conductive portion and the insulating portion of the active region are connected to the outer surface of the conductive layer and the yarn color edge, respectively.
- the special feature is that it consists of the outer surface of the layer.
- the conductive portion and the insulating portion are formed on the side surface of the member, the conductive portion and the insulating portion having a desired width can be formed regardless of the thickness of the conductive layer. Is possible. In other words, the width of the conductive portion and the edge portion can be freely adjusted to be wider or narrower than the thickness of the conductive layer or the insulating layer, so that an optimum working region can be formed for the purpose of use. .
- the linear device of the first invention is the linear device according to the first invention, wherein a tip protection member is provided at one end of the linear member so as to cover the end surface, and the material of the tip protection member is
- the tip of the linear member is covered with the protective member.
- the tip portion can be prevented from being damaged when inserted into the object.
- the tip of the tip protection member has a substantially conical shape, that is, a shape that narrows toward the tip, the resistance when inserted into the object can be reduced, and the object or linear shape can be reduced. It is possible to prevent the member from being damaged.
- it since it is made of an insulating material, it is possible to prevent the current from flowing to the tip of the linear member when a current is passed through the conductive layer of the linear member. In other words, it is possible to prevent a current from flowing between the conductive layers to which a voltage is applied via the tip of the linear member. For this reason, even if the shape of the tip of the linear member varies due to, for example, manufacturing errors or manufacturing lot differences, it is possible to prevent the sensitivity and accuracy of each linear member from varying.
- FIG. 1 is a schematic explanatory view of a linear device 1 of the present embodiment, where (A) is a side view and (B) is an enlarged view of a processing region 10.
- FIG. 2A is a schematic side view of the linear device 1A in which the processing region 10 is not formed
- FIG. 2B is a view taken along the line B-BH in FIG.
- FIG. 3 is a schematic explanatory view of a linear device 1 B according to another embodiment, in which (A) is a side view and (B) is an enlarged view of a processing region 10.
- FIG. 4 is a schematic explanatory diagram of an apparatus for forming a layer on the outer peripheral surface of the rod-shaped material 100 that becomes the central shaft portion 2 of the linear device 1 of the present embodiment.
- Fig. 5 is an explanatory diagram of another mechanism for rotating the rod-shaped material 100 around its axis.
- (A) is a mechanism for rotating one central shaft portion 2
- (B) is a mechanism for (A).
- B—B arrow view (c) is a mechanism for rotating a plurality of rod-shaped materials loo.
- FIG. 6 is a schematic explanatory diagram of an apparatus for forming a layer on the outer peripheral surface of the rod-shaped material 100 using the holding unit 60 that holds a plurality of rod-shaped materials 100.
- FIG. 7 (A) is a view taken along line VI-VI of Fig. 6, (B) is a view taken along line B-B of (A), and (C) is a rod-shaped material 100 around its axis.
- FIG. 10 is an explanatory diagram of another mechanism that rotates the motor.
- FIG. 8 is a schematic explanatory view of a linear device 1 C according to another embodiment, in which (A) is a side view, (B) is a cross-sectional view taken along line BB in (A), (C ) Is a cross-sectional view taken along the line CC in (A).
- FIG. 1 is a schematic explanatory view of a linear device 1 of the present embodiment, where (A) is a side view and (B) is an enlarged view of a processing region 10.
- 2A is a schematic side view of the linear device 1A in which the processing region 10 is not formed
- FIG. 2B is a view taken along the line BB in FIG.
- the linear device 1 of the present embodiment is a linear, elongate member extending along the axial direction (left-right direction in FIG. 1), which is an insulative material and a conductive material.
- a plurality of layers made of a conductive material is formed, and is a linear member as defined in the claims.
- reference numeral 2 denotes a central shaft portion that is a rod-shaped member extending along the axial direction of the linear device 1.
- the central shaft portion 2 has a conductive material and a circular cross section.
- a plurality of thin layers are provided from the central shaft portion 2 to the outer layer, that is, along the radial direction of the central shaft portion 2.
- the plurality of thin layers are composed of insulating layers 4A to 4D of insulating material and conductive layers 3B to 3D of conductive material. Insulating layers 4A to 4D and conductive layers 3B to 3D are formed so as to alternately overlap. That is, a plurality of layers are formed such that the insulating layer 4A to 4D are electrically insulated between the central shaft portion 2 and the conductive layer 3B and between the adjacent conductive layers 3B to 3D. It is formed.
- the conductive layers 3 B to 3 D and the insulating layers 4 A to 4 D are formed by a thin film method such as a vapor deposition method or a sputtering method, but are not limited to these methods, and any method is used. Also good.
- a thin film method such as a vapor deposition method or a sputtering method, but are not limited to these methods, and any method is used. Also good.
- platinum is used as the material for the conductive layer 3
- a layer of another substance is formed as a base, and then the conductive layer 3 made of white gold is formed on the surface of the layer. If formed, the fixability of platinum can be improved. For this reason, the voltage at the other end of the linear device 1 is between the central shaft portion 2 and the conductive layer 3 B or between the adjacent conductive layers 3 B to 3 D (hereinafter referred to as the conductive layer together).
- a potential difference is generated between the conductive layers at one end of the linear device 1.
- an electrode is connected to the central shaft portion 2 and the conductive layers 3B to 3D on the axial end face (for example, the right end face in FIG. 2 (A)).
- a potential difference is generated between the conductive layers exposed at one end face on the other end face in the axial direction (for example, the left end face in FIG. 2A, hereinafter referred to as one end face).
- a substance near one end surface for example, a living body such as a human body, is electrically connected to nerves or tissues. Stimulation can be given, and by measuring the current value flowing between the conductive layers at the other end of the linear device 1, the resistance value of the substance in the vicinity of the one end can be measured.
- the diameter D of the linear device 1 of the present embodiment is 1 to 200 m and can be made very thin compared to the conventional force ⁇ electrode or glucose sensor. When the device 1 is treated, the influence on surrounding tissues and materials can be reduced.
- the space occupied by the linear device 1 can be reduced, and cells that are damaged when inserted into a living body such as a human body are inserted. Can be reduced. Therefore, it is possible to reduce the damage to the object to which the linear device 1 is treated, and it is possible to suppress a sense of incongruity and pain even if it is applied to a living body such as a human body.
- the region (hereinafter referred to as the contact region) is determined by the area where the central shaft portion 2 and the conductive layer 3 are exposed on the surface of the linear device 1 and the thickness of the insulating layer 4, but the linear device of this embodiment 1 has a very small diameter D, and since the conductive layers 3B to 3D and the insulating layers 4A to 4D are thin layers, the contact area is very small.
- electrical stimulation can be applied only to very fine areas, or very local resistance values can be measured.
- the linear device 1 according to the present embodiment is inserted into the brain of a living body, specific cells or nerves existing in a minute region in the brain can be prevented. Therefore, the detailed function of each organ in the brain can be elucidated by confirming the reaction of the living body due to the stimulation.
- the linear device 1 of this embodiment when the linear device 1 of this embodiment is used, when some nerves are disconnected due to spinal cord injury or the like, electric stimulation is applied to the disconnected nerves without stimulating other normal nerves. As a result, it is possible to suppress a decrease in function of the disconnected nerve without causing pain to the patient. If electrical stimulation is given, the growth of nerve cells is promoted, so that regeneration of disconnected nerves can be promoted.
- abnormal brain waves in the case of abnormal brain waves (during seizures), it is possible to calm and control abnormal brain waves by stimulating only specific areas in the brain, and to stimulate the visual cells and visual nerves electrically.
- visual acuity the recovery (improvement) of visual function (visual acuity) is possible, and it can be restored to normal operation by stimulating specific nerves and muscles of the heart in the case of cardiac abnormalities such as arrhythmia 'heart failure' cardiac arrest.
- cardiac abnormalities such as arrhythmia 'heart failure' cardiac arrest.
- it if it is inserted into a blood vessel, it can be used for clot degradation by electrical stimulation.
- the linear device 1 of the present embodiment can be used as a stimulation device that transmits information converted into an electrical signal to the nerves of each sensory organ.
- a stimulation device that transmits information converted into an electrical signal to the nerves of each sensory organ.
- sound or images can be captured.
- the information captured by the sensor and converted into electrical signals must be accurately transmitted to the nerves of each sensory organ without damaging the nerves.
- the linear device 1 of this embodiment is used as such a stimulation device, the area to which the stimulus is applied can be made very fine, so that the nerve to which the signal is transmitted is hardly damaged. It is possible to accurately transmit signals to.
- the predetermined substance is provided at one end surface of the linear device 1.
- the predetermined substance is provided at one end surface of the linear device 1. The presence / absence and the amount / concentration can be detected.
- the glucose oxidase is attached to the conductive layer 3 B as a detection substance, and glucose exists in the vicinity of one end of the linear device 1, the glucose and glucose oxidase react to react with glucose. Hydrogen peroxide is generated according to the amount.
- a voltage is applied between the central shaft portion 2 and the conductive layer 3 B, hydrogen peroxide is reduced in the conductive layer 3 B. Therefore, depending on the amount of hydrogen peroxide, the central shaft The amount of current flowing between the part 2 and the conductive layer 3 B changes. In other words, since the electric current flowing between the central shaft portion 2 and the conductive layer 3B changes according to the amount of glucose present in the vicinity of one end of the linear device 1, the presence / absence of glucose and its amount ⁇ The concentration can be detected.
- the detection substance is not limited to an enzyme such as glucose oxidase as described above, for example, antigen, antibody, polypeptide, receptor, acceptor, nucleic acid, sugar, cell, microorganism, permselective membrane, Non-specific adsorption preventing membranes, chelating agents, crown ethers, cyclodextrins and the like may be used without any particular limitation.
- an enzyme such as glucose oxidase as described above, for example, antigen, antibody, polypeptide, receptor, acceptor, nucleic acid, sugar, cell, microorganism, permselective membrane, Non-specific adsorption preventing membranes, chelating agents, crown ethers, cyclodextrins and the like may be used without any particular limitation.
- the physical quantity detected between the central shaft portion 2 and the conductive layers 3B to 3D is not limited to the current, and the potential difference between the central shaft portion 2 and the conductive layers 3B to 3D varies. May be detected, and the most suitable one may be selected according to the substance to be detected and its reactant. Furthermore, it is possible to measure a plurality of substances at the same time by changing the detection substance to be attached to each of the conductive layers 3 B to 3 D.
- an electroluminescent material such as polysilane, a carbazole derivative, or a metal complex
- a voltage is applied between the conductive layers, light of a predetermined wavelength is emitted from the EL material at one end of the linear device 1, so that the light can be a substance near one end, for example, a living body such as a human body.
- optical stimulation can be given to nerves and tissues.
- an EL material that emits light having a near-ultraviolet or ultraviolet wavelength such as polysilane
- cells that adversely affect the living body such as cancer cells and tumors
- the electroconductive layer 3 is coated with a photocatalytic material such as titanium oxide together with the EL material, cancer cells and the like can be effectively killed.
- the EL material is an infrared light emitting material, the object can be heated in addition to the optical stimulus.
- the electrical resistance of, for example, titanium-nickel alloy, platinum, silicon carbide, carbon, or the like so as to connect between the central shaft portion 2 and the conductive layer 3B or between the adjacent conductive layers 3B to 3D.
- a heating element may be coated. In this case, if a voltage is applied between the conductive layers, the electrical resistance heating element generates heat, so that a substance near one end can be thermally stimulated, and cancer cells, etc. are affected by surrounding cells. It can be killed by calo heat without giving it.
- the pharmacologically active substance is attached to the surface of the conductive layers 3 B to 3 D of the linear device 1 of the present embodiment so as to be released by performing an electrical, thermal, or optical operation. Then, it is possible to insert an electrode into a specific microregion such as a cancer cell and to administer the drug pinpoint.
- polymethacrylic acid shrinks when the pH is acidic at around 3, but has a property of spreading when the pH is 6. If the drug is encased in this polymethacrylic acid film and adhered to the surface of the conductive layers 3 B to 3 D, an electric current is passed between the conductive layers to generate electrolytic base, and the pH in the vicinity of the conductive layers 3 B to 3 D is increased. When is changed to 6, the polymethacrylic acid film can be expanded. Then, since the drug encapsulated in the membrane can be released, the drug can be administered at a desired timing and position by adjusting the timing of current flow between the conductive layers.
- each layer is formed on the axis. For this reason, even when the linear device 1 is rotated and inserted into the object Since the contact state between the contact area of the linear device 1 and the object can be prevented from being affected by the rotation angle around the central axis of the linear device 1, an electrical stimulus or resistance can be applied. It is possible to improve the accuracy of the position where the measurement is performed.
- a concentric layer that is, an axial target layer
- the linear shape The contact state between the device 1 and the object can be the same. Therefore, regardless of the rotation angle around the central axis of the linear device 1, it is possible to apply an electrical stimulus to an accurate position, measure the resistance value of the accurate position, etc. When performing stimulation or measurement multiple times, the reproducibility of measurement can be improved.
- the linear device 1 since the linear device 1 has the central shaft portion 2 at the center, the strength of the linear device 1 can be increased. For this reason, when the linear device 1 is pierced into an object, it can be prevented from buckling or breaking even if an axial force is applied to the linear device 1.
- the tip of the linear device 1 can be reliably arranged at a desired position.
- the linear device 1 when a superelastic alloy is used, the elasticity of the linear device 1 becomes very high, so that the followability to deformation of the object is enhanced. Because of this, the linear device on the object
- the material of the central shaft portion 2 is not limited to a conductive material, and an insulating material may be used.
- an insulating material may be used.
- the elasticity of the linear device 1 becomes very high as in the case of a superelastic alloy, so that the followability to deformation of the object is high. Become. For this reason, it is used for objects that bend or deform greatly. However, the possibility that the linear device 1 is damaged due to the deformation of the object can be reduced.
- light-transmitting glass or resin such as an optical fiber
- light can be emitted from the tip of the linear device 1 by passing light through the central shaft portion 2, so that the linear device 1 can give an optical stimulus to the treated part, or the characteristics of that part. Can be optically inspected.
- the object can be irradiated with laser light through the central shaft 2 formed by an optical fiber or the like, so if used for the treatment of minimally invasive lasers such as cancer and relaxation plate hernia, surrounding cells This is preferable because the laser can be reliably irradiated at a desired position without affecting the above.
- minimally invasive lasers such as cancer and relaxation plate hernia
- surrounding cells This is preferable because the laser can be reliably irradiated at a desired position without affecting the above.
- two or more linear devices 1 are used, light is radiated from one, and the reflected light from the living body is captured by the other linear devices 1, local changes due to changes in the intensity of the reflected light, etc. Changes in temperature and in-vivo pressure can also be captured.
- the local shaft 1 Changes in temperature and in-vivo pressure can be captured.
- the surface of the conductive layers 3 B to 3 D is covered with an EL material, light having a predetermined wavelength can be generated from the EL material by applying a voltage between the conductive layers. Then, if there is a fluorescent substance or the like that is excited by the light emitted from the EL material in the object, the light can be detected at the central axis 2, so the presence or absence of the substance, The amount can be grasped.
- the linear device 1 when the linear device 1 is inserted into the object, if the laser beam is incident from the other end of the central shaft portion 2 and the laser beam is emitted from one end surface, the linear device is generated by the laser beam. Since the part into which 1 is inserted can be baked to form a hole, if the linear device 1 is inserted into the hole, the linear device 1 can be easily rotated without rotating it around its axis. 1 can be inserted into the object. In this case, since the linear device 1 is inserted into the portion where the hole is formed by being burned by the laser, when the linear device 1 is inserted, a force is applied from the object to the linear device 1. Is not Therefore, it is possible to more reliably prevent the linear device 1 from being damaged.
- a superelastic alloy may be used as the material of the conductive layer 3 connected only by the central shaft portion 2. In this case, when the linear device 1 is pushed around the object while rotating around the central axis. In addition, the linear device 1 can be more reliably prevented from being bent and damaged, and the linear device 1 can be reliably inserted into a living body or the like.
- a super elastic alloy may be used for the conductive layer 3 and another material may be used for the central shaft portion 2.
- the linear device 1 can be reliably inserted into a living body or the like. The effect is obtained.
- the superelastic alloys used as the material of the central shaft part 2 and the conductive layer 3 are, for example, titanium-nickel alloy (T i_N i), indium-thallium alloy (I nT 1), copper-zinc alloy (Cu -Zn), copper-zinc-X alloy (Cu-Zn-X (Si, Sn, A1, Ga)), copper-aluminum-nickel alloy (Cu-Al-Ni), copper-gold-zinc alloy (Cu_Au—Zn), copper-tin alloy (Cu—Sn), nickel-aluminum alloy (N i -Al), iron-platinum alloy (Fe-Pt), indium-cadmium alloy (I n-Cd ), Manganese-Copper Alloy (Mn_Cu), Silver-Cadmium Alloy (Ag-Cd), Gold-Cadmium Alloy (Au-Cd), Iron-Palladium Alloy (Fe-Pd), Iron-Nickel-Connorto
- the linear device 1 of this embodiment is to be treated in a living body such as a human body
- an alloy that does not contain copper, nickel, or cadmium harmful to the living body is preferable. Titanium-nickel alloys can be used in living bodies because the amount of nickel that dissolves in vivo is less than that of stainless steel used for fracture treatment.
- the material of the conductive layer 3 in this embodiment is not limited to the superelastic alloy, but Au (gold) or silver (A g), copper (C u), platinum (P t), platinum-iridium (P t—I r) alloys, etc., palladium (P d), nickel (N i), titanium (T i), Carbon (C), polypyrrole, polythiophene, polyaniline, polyacetylene, etc. may be used, and there is no particular limitation.
- the linear device 1 can be more reliably prevented from being bent and broken, and the linear device 1 can be reliably inserted into a living body or the like.
- a superelastic resin may be used for the insulating layer 4 and a material other than the superelastic alloy may be used for the central shaft portion 2 and the conductive layer 3, and in this case, the linear device 1 is inserted into a living body or the like. The effect that it can be done is obtained.
- the superelastic resin used as the material of the insulating layer 4 is, for example, polyisoprene, styrene / butadiene copolymer, polyethylene, fluororesin, polyethylene + nylon, polyethylene + perprene, polyacrylate, polymethacrylate.
- polysiloxane, silicone resin, polychlorinated vinyl, chlorinated polyethylene, polyethylene, polyethylene + polyvinyl chloride, polyethylene + fluororesin, polyuretan, polyimide, polyamide, polysilane, etc. are suitable.
- the superelastic resin used as the material of the insulating layer 4 is unlikely to cause a rejection reaction in the living body.
- Suitable fluororesins, polysiloxanes and the like are suitable.
- the material of the insulating layer 4 of the present embodiment is not limited to the superelastic resin, and PET, polyethylenediamine, polyurethane, nylon, polyvinyl chloride, polysiloxane, glass (S i 0 2), polypropylene, polythiophene, Polyester, polyethylene, urea resin, polysilane, polyaniline, metal oxide, etc. may be used, and there is no particular limitation.
- the above superelastic alloys used as the material of the conductive layer 3 are used as semiconductors. Therefore, if a highly conductive material is used as the material of the conductive layer 3, a superelastic alloy that can be used as a semiconductor can be used as the material of the insulating layer 4.
- a superelastic alloy that can be used as a semiconductor can be used as the material of the insulating layer 4.
- a so-called sashimi memory material may be used as the above-described superelastic alloy or superelastic resin. In this case, the linear device
- a shape memory material that has a predetermined shape at a temperature approximately equal to the temperature of the object to be treated 1 is used as the material of the central shaft part 2, the conductive layer 3, and the insulation layer 4, the inside of the object In this case, the shape of the linear device 1 can be reliably deformed into a predetermined shape.
- the linear device 1 is inserted into the object, for example, when it is stored and transported, it is kept in a shabby shape, but when inserted into the object, it is inserted in a predetermined shape, for example, in a straight state.
- the linear device 1 can be easily inserted. Then, it is possible to prevent the linear device 1 from being bent and damaged during insertion. Therefore, the linear device 1 can be reliably disposed at a desired position, and the object to be treated can be prevented from being damaged. Further, since the linear device 1 is always maintained in a predetermined shape in the object, it is possible to prevent the position of the tip portion of the linear device 1 from being shifted.
- the deformation temperature of the shape memory material may be changed depending on the position of the linear device 1 in the axial direction. For example, if only the tip of the linear device 1 has a predetermined shape at a temperature higher than the temperature of the object and the electric resistance heating element as described above is provided at the tip, the conductive layer 3 is energized. By doing so, only the tip of the linear device 1 can be heated by the electric resistance heating element, so that only the tip can be deformed into a desired shape. Then, if the tip of the linear device 1 spirals or bends at a predetermined temperature, when power is applied, that is, when a stimulus is applied by the linear device 1 In addition, it is possible to more reliably prevent the linear device 1 from coming off or moving from the object.
- electrical stimulation can be applied more locally and precisely, or a substance near one end can be detected more accurately. Can do.
- conductive portions 13 ⁇ / b> A to 13 ⁇ / b> D and insulating portions 14 ⁇ / b> A to 14 ⁇ / b> D are alternately formed on the outer peripheral surface of the linear device 1 along the axial direction.
- the conductive portions 13A to 13D in the processing region 10 are the central shaft portion 2 and the conductive layers 3A to 3D.
- the insulating portions 14A to 14D are formed by the outer surfaces of the insulating layers 4A to 4D. That is, the processing region 10 is formed by exposing the outer surfaces of a plurality of layers formed on the outer peripheral surface of the central shaft portion 2.
- the conductive portions 13A to 13D and the insulating portions 14A to 14D are formed on the side surface of one end of the linear device 1, the thickness of the conductive layers 3A to 3D and the thickness of the insulating layers 4A to 4D Regardless, the conductive portions 13A to 13D and the insulating portions 14A to 14D having a desired width, that is, a desired exposed area can be formed.
- the width of the conductive parts 13A to 13D and the insulating parts 14A to 14D can be freely adjusted to be wider or narrower than the thickness of the conductive layers 3A to 3D and the thickness of the insulating layers 4A to 4D. Therefore, the optimum working region 10 can be formed according to the purpose of use of the linear device 1.
- the conductive portions 13A to 13D and the insulating portions 14A to 14D in the processing region 10 are, for example, conductive layers 3A to 3 £) at one end of the linear device 1A in FIG. ⁇ 4D is removed by photolithography, etc., or the conductive parts 13A to 13D etc. are formed in the part where the conductive parts 13A to 13D and the insulating parts 14A to 14D are formed from the beginning. It is formed by a method such as masking so that the material of the outer layer, that is, the layer on the surface side, is not attached to the electric layer 3 A to 3 D, etc., but the processing region 10 is formed. The method to do is not particularly limited to the above method, and any method may be used.
- the processing region 10 when the processing region 10 is formed, if the tip protection member 11 is provided at one end of the linear device 1, that is, the tip that is to be inserted into the subject, the treatment device 10 is inserted into the subject. In this case, it can be prevented that one end of the linear device 1 is damaged and the processing region 10 is damaged.
- the tip of the tip protection member 11 is formed into a substantially conical shape, that is, a shape that narrows toward the tip, the resistance during insertion can be reduced. Damage to the object and the linear device 1 due to resistance during insertion can be reduced.
- the tip protection member 11 is made of an insulative material, one end of the linear device 1 that increases the current density when a current is passed through the conductive layer 3, that is, the linear device. Current can be prevented from flowing through the tip of 1. Then the line Even if the shape of the tip of the device 1 varies due to, for example, a manufacturing error or a difference in the manufacturing inlet, it is possible to prevent the sensitivity and accuracy of each H-shaped device 1 from varying.
- a connecting region 20 having a configuration substantially similar to that of the processing region 10 may be formed at the other end portion of the linear device 1.
- the area of the power connection part 23A-23D and the insulation part 24A-24D in the connection region 20 should be wider than the thickness of the conductive layers 3A-3D and the thickness of the insulation layers 4A-4D. Therefore, it is possible to easily connect electrodes such as a power source to the conductive layers 3A to 3D of the linear device 1, and to reliably prevent a short circuit between the conductive layers in the connection region 20 This is preferable.
- the linear device 1 described above has a circular cross-sectional shape as the central shaft portion 2, but the cross-sectional shape of the central shaft portion 2 is not limited to a circular shape, for example, a square or a triangle. There may be no particular limitation on the shape.
- the linear device 1 may be one in which a conductive layer 3 and an insulating layer 4 are laminated on the surface of an elongated plate 2B serving as a base layer instead of the central shaft portion 2.
- the linear device 1 C may include a conductive layer 3 and an insulating layer 4 on the surface of the central shaft portion 2 serving as a base layer.
- a conductive layer 3 is formed on the outer peripheral surface of the central shaft portion 2, and an insulating layer 4 is formed so as to cover the conductive layer 3.
- a contact portion TF where the conductive layer 3 is exposed is provided at the tip.
- the linear device 1 C is pointed so that the distal end thereof becomes thinner from the proximal end toward the distal end. For this reason, it is possible to reduce resistance when inserted into a living body and the like, and since the area of the contact portion TF is reduced, electrical stimulation can be applied locally, and substances present in minute regions can be applied. Detection and measurement can be performed. If the area of the contact part TF is adjusted, the contact area between the conductive layer 3 and the object can be adjusted. Therefore, it is possible to adjust the area for applying electrical stimulation and the measurement area. Furthermore, as shown in FIG.
- the conductive layer 3 can be prevented from coming into direct contact with a measurement object such as a living body. Can do. Then, since the living body and the like can be prevented from being affected by the conductive layer 3, various materials can be used as the material of the conductive layer 3.
- the layer formed on the surface of the contact portion TF is not limited to platinum, and may be any stable substance that does not affect the living body such as gold or titanium, and is not particularly limited.
- the conductive layer 3 may be formed of platinum PT.
- a conductive layer made of platinum is formed on the surface of the layer after forming a layer of another substance on the surface of the central shaft portion 2 as a base. If layer 3 is formed, the fixability of platinum can be improved.
- the linear device 1 of the present embodiment is to be treated in a living body such as a human body, all regions where the linear device 1 comes into contact with the living body except for the tip and the processing region 10 are ⁇
- a thin film such as a fluororesin, polyurethane, polysiloxane, silicone resin, phospholipid-like polymer, etc. in which the living body does not show rejection. Then, since the linear device 1 is not in direct contact with a living body or the like, it is possible to prevent the living body from showing a rejection reaction when the linear device 1 is placed on the living body.
- the tip and the processing region 10 can be covered with the thin film.
- the thin film does not function as an insulating layer, it functions as a functional film that suppresses the adhesion of proteins and the like that obstruct the conduction part to the surface of the linear device 1. Is preferred.
- FIG. 4 is a schematic explanatory view of an apparatus for forming a layer on the outer peripheral surface of the rod-shaped material 100 that becomes the central shaft portion 2 of the linear device 1 of the present embodiment.
- Fig. 5 is an explanatory diagram of another mechanism for rotating the rod-shaped material 100 around its axis.
- (A) is a mechanism for rotating a single rod-shaped material 100
- (B) is B- It is a B line arrow view
- (C) is a mechanism which rotates the several rod-shaped raw material 100.
- the symbol SP indicates the vacuum chamber of the sputtering device that performs spattering
- the symbol T indicates the target.
- the code TB has a central shaft 2 A table to be placed is shown.
- the vacuum chamber SP is connected to a vacuum pump for evacuating the inside.
- reference numeral 100 indicates a rod-shaped material that becomes the central shaft portion 2 of the linear device 1 of the present embodiment.
- One end of the rod-shaped material 100 is gripped by a gripping member 52, which is a known chuck or the like having three claws, for example.
- the gripping member 52 is provided at its rear end with a rotating shaft 52a that is coaxial with the rod-shaped material 100 when the gripping member 52 grips the rod-shaped material 100.
- the rotating shaft 52a is connected to a motor (not shown) via a speed reducer or the like.
- the other end of the rod-shaped material 100 is rotatably held by a bearing 51 provided on the table TB.
- the gripping member 52 rotates around the rotation shaft 52a via the rotation shaft 52a. Therefore, the rod-shaped material 100 can be rotated around the shaft together with the gripping member 52. it can.
- the target material can be sequentially attached to the outer peripheral surface of the rod-shaped material 100.
- the outer peripheral surface of the rod-shaped material 100 is sequentially arranged on the target T side, a layer of the target material having no breaks or boundaries can be formed on the outer peripheral surface of the rod-shaped material 100.
- a different material can be attached to the surface of the layer simply by replacing the target T. That is, a plurality of layers can be formed on the outer peripheral surface of the rod-shaped material 100 simply by exchanging the target T, so that the linear device 1 of the present embodiment can be formed.
- the structure which rotates the rod-shaped raw material 100 is not restricted to said structure, What kind of structure may be sufficient.
- FIGS. 5 (A) and 5 (B) may be used.
- reference numeral 53 denotes a pair of rollers 53 and 53 having rotating shafts parallel to each other.
- the pair of rollers 53 and 53 are disposed such that the distance D between the outer peripheral surfaces is narrower than the shaft diameter of the rod-shaped material 100. Therefore, one end of a rod-shaped material is arranged in the gap A formed between the pair of rollers 5 3 and 5 3, and the pair of rollers 5 3 and 5 3 Can be rotated in the opposite direction to the roller 53 by rotating them in the same direction.
- the bearing 51 holds the other end of the rod-shaped material 100 in a state where one end of the rod-shaped material 100 is arranged in the gap A formed between the pair of rollers 5 3, 5 3.
- the shaft is disposed at a position parallel to the rotation axis of the roller 53, but it is preferable to have a mechanism for holding the rod-shaped material 100 so as not to move in the axial direction. .
- a layer may be formed on the surface of the plurality of rod-shaped materials 100 held by the material holder 60.
- reference numerals 61 and 62 indicate shaft support portions of the material holder 60 that hold the end portions of the plurality of rod-shaped materials 100.
- One shaft support portion 61 supports one end of the rod-shaped material 100 so as to be rotatable about its axis and not to move in the axial direction.
- the other shaft support portion 62 is for rotatably supporting the other end of the rod-shaped material 100.
- the shaft holding part 62 supports the rod-shaped material 100 with the other end protruding outward from the shaft holding part 62. The reason will be continued.
- a pair of connecting members 63, 63 is provided between the pair of shaft support portions 61, 62, and the pair of shaft support portions 61, 62 are provided with the rod-shaped material 100 attached. They are connected so that they are not separated.
- the table TB is provided with support members Ta and Tb for supporting the pair of shaft support portions 61 and 62 of the material holder 60.
- a conveyor mechanism 65 having an endless belt is provided below the position where the end of the rod-shaped material 100 protruding from the shaft holding portion 62 is disposed.
- the conveyor mechanism 65 is configured such that when the pair of shaft support portions 61 and 62 of the material holder 60 are attached to the pair of support members Ta and Tb, the upper surface of the endless belt is the rod-shaped material 100. It is arranged so as to be ig on the lower surface of the end of the.
- the pair of shaft support portions 61, 62 of the material holder 60 is connected to the pair of support members Ta, If the conveyor mechanism 65 is driven with Tb attached, the rod-shaped material 100 can be rotated in the direction opposite to the moving direction of the endless belt (FIG. 7). Therefore, if the target material is irradiated from the target T while rotating the rod-shaped material 100, the target material can be sequentially attached to the outer peripheral surface of the rod-shaped material 100.
- the rod-shaped material 100 can be handled with a plurality of rod-shaped materials 100 attached to the material holder 60, the rod-shaped material 100 can be handled easily and can be prevented from being damaged or lost.
- the method of rotating the end of the rod-shaped material 100 is not limited to the conveyor mechanism as described above, and any method may be used.
- a plate-like member 6 6 that contacts the upper surface of the end of the rod-like material 100 is provided, and this plate-like member 6 6 is reciprocated left and right to move the rod-like material 100. It is also possible to use a mechanism that rotates them alternately clockwise and counterclockwise (Fig. 7 (C)).
- the central shaft part 2 is made of a superelastic alloy (N i- ⁇ i ⁇ ) with a diameter of 0.08 or less.
- the platinum conductive layer 3 is formed by the sputtering method, and the polyimide insulating layer is formed by the electrodeposition coating method. Repeat the formation of 4 three times alternately. As a result, a concentric wire-like linear device 1 in which three conductive layers 3 and three color edge layers 4 are alternately laminated is formed.
- this concentric wire-like linear device 1 When one end of this concentric wire-like linear device 1 is alternately immersed in chloroform and aqua regia for a desired range, the polyimide insulating layer 4 is dissolved by black mouth form, and the platinum conductive layer 3 is aqua regia. Thus, a treatment region 10 having three conductive portions 13 is formed at one end of the linear device 1.
- silver plating is performed on the conductive portion 13 at one place by an electrolytic plating method, followed by electrolytic oxidation in a hydrochloric acid solution to form a silver chloride film.
- a reference electrode was formed by coating.
- the other conductive parts 13 are immersed in a phosphate buffer solution (PH7.4) containing a pyrrole derivative, glucose oxidase (GOD) and lithium perchlorate, and after sufficient deaeration, they are kept under ice temperature.
- a measurement electrode was formed by controlled potential electropolymerization at 1.2 V (vs. Ag / AgCl).
- a tip protection member 11 was formed of silicon rubber on one end face of the linear device 1, and the entire linear device 1 was covered with polyurethane.
- One end of the linear device 1 manufactured in this way is embedded between the rat's shoulder ribs, and the other end of the conductive layer 3 constituting the measurement electrode, the reference electrode and the counter electrode is respectively connected to the electrochemical analyzer. And 1.2 V (vs. Ag / AgCl) was applied to the measurement electrode. Then, a current corresponding to the glucose concentration in the rat's body was detected.
- the linear device of the present invention is collected from an instrument that applies an electrical stimulus, a thermal stimulus, or an optical stimulus to a living body or the like, or a substance in the living body or a living body. Used for measuring instruments that check the components contained in the measured substances and inspection devices that measure the electrical, electrochemical, or optical properties of the changes that occur in the living body. can do.
Abstract
Description
Claims
Priority Applications (3)
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EP04711459A EP1604609A4 (en) | 2003-02-17 | 2004-02-16 | LINEAR DEVICE |
JP2005505024A JP3894943B2 (ja) | 2003-02-17 | 2004-02-16 | 線状デバイス |
US10/544,243 US20070088208A1 (en) | 2003-02-17 | 2004-02-16 | Linear device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-038609 | 2003-02-17 | ||
JP2003038609 | 2003-02-17 |
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WO2004071294A1 true WO2004071294A1 (ja) | 2004-08-26 |
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PCT/JP2004/001669 WO2004071294A1 (ja) | 2003-02-17 | 2004-02-16 | 線状デバイス |
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US (1) | US20070088208A1 (ja) |
EP (1) | EP1604609A4 (ja) |
JP (1) | JP3894943B2 (ja) |
WO (1) | WO2004071294A1 (ja) |
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JP2020525172A (ja) * | 2017-06-30 | 2020-08-27 | ウニヴェルズィテート ベルン | 電極を備えたインターベンションデバイス |
CN111263654A (zh) * | 2017-06-30 | 2020-06-09 | 伯尔尼大学 | 带有电极的介入装置 |
JP7121886B2 (ja) | 2017-06-30 | 2022-08-19 | ウニヴェルズィテート ベルン | 電極を備えたインターベンションデバイス |
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JP3894943B2 (ja) | 2007-03-22 |
JPWO2004071294A1 (ja) | 2006-06-01 |
US20070088208A1 (en) | 2007-04-19 |
EP1604609A1 (en) | 2005-12-14 |
EP1604609A4 (en) | 2008-09-03 |
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