WO2021145338A1 - Guide block separation tool - Google Patents

Guide block separation tool Download PDF

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Publication number
WO2021145338A1
WO2021145338A1 PCT/JP2021/000832 JP2021000832W WO2021145338A1 WO 2021145338 A1 WO2021145338 A1 WO 2021145338A1 JP 2021000832 W JP2021000832 W JP 2021000832W WO 2021145338 A1 WO2021145338 A1 WO 2021145338A1
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WO
WIPO (PCT)
Prior art keywords
guide block
radius
fixing plate
hole
facing surface
Prior art date
Application number
PCT/JP2021/000832
Other languages
French (fr)
Japanese (ja)
Inventor
平田　仁
秀 栗本
直朗 安村
将史 横田
優人 大谷
数磨 中村
竣介 大河内
Original Assignee
ニプロ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニプロ株式会社 filed Critical ニプロ株式会社
Priority to JP2021571206A priority Critical patent/JPWO2021145338A1/ja
Publication of WO2021145338A1 publication Critical patent/WO2021145338A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same

Definitions

  • the present invention guides a fixing screw that is placed and held on the radius fixing plate and rotated to fix the radius fixing plate to the radius, and is used when the guide block for the radius fixing plate is separated from the radius fixing plate. Regarding the release tool for blocks.
  • a splint ie, splint
  • a plaster cast or FRP cast is replaced by a partial incision in the arm near the fracture to secure the fractured part of the radius, straddling the fractured part.
  • Radial fixation plates for fixing the radius are known.
  • a thin metal plate such as titanium or an alloy thereof, which is tough, lightweight, and has high biosafety, has been used as the radius fixing plate.
  • the metal plate does not allow X-rays to pass through, and there is a problem that the state of the fractured part covered with the radius fixing plate cannot be grasped.
  • the radius fixing plate When such a resin-made radius fixing plate is fixed to the radius with fixing screws, the radius fixing plate is thin, so that each female screw provided on the radius fixing plate has a specified direction (for example, with respect to the plate surface).
  • the fixing screw cannot be inserted in the vertical direction), which may lead to damage to the female screw.
  • the insertion direction of the fixing screw to the radius fixing plate is designed in advance to match the shape of the radius, so if the fixing screw is inserted in any other direction, the female screw will not be damaged. , May interfere with the functioning as a radial fixation plate.
  • a guide block is placed in the distal region of the radius fixing plate so that the fixing screw can be inserted in the specified direction.
  • a guide block See, for example, Patent Document 1.
  • a plurality of holding claws are arranged on the outer peripheral edge of the guide block so that the holding claws can be detachably held by the radius fixing plate, while the holding claws are released and the guide block is held by the radius fixing plate. It is conceivable to remove it from.
  • an object of the present invention is to solve the above-mentioned problems, and not from the lateral direction of the guide block, but from the upper side to the lower side of the guide block, in other words, from the region incised at the time of arranging the guide block. , To provide a guide block release tool that can be easily inserted between the guide block and the radius fixing plate to easily and reliably remove the guide block from the radius fixing plate. ..
  • the guide block detaching tool for detaching the guide block held by the radius fixing plate from the radius fixing plate.
  • a coupling member that is coupled to the coupling portion of the guide block and is coupled to the guide block,
  • the guide block In a state of being coupled to the guide block by the connecting member, the guide block is pressed and contacted downward from the upper side with the guide block facing surface of the radius fixing plate to widen the distance between the guide block facing surface and the guide block.
  • a release tool for a guide block provided with an extrusion member.
  • the incision is made not from the lateral direction of the guide block but from the upper side of the guide block downward, in other words, at the time of arranging the guide block.
  • the extrusion member can press-contact the guide block facing surface of the radius fixing plate to easily and surely widen the distance between the guide block facing surface and the guide block.
  • the work of removing the guide block from the radius fixing plate can be easily and surely performed, and it is not necessary to provide a special configuration for the radius fixing plate.
  • FIG. 7B is a cross-sectional view corresponding to the cross-sectional view taken along the line CC of FIG. 7B in the detaching tool according to the modified example of the second embodiment of FIG. 7A.
  • the guide block release tool 31 is a tool for detaching the guide block 5 held by the radius fixing plate 2 from the radius fixing plate 2. Before explaining the guide block release tool 31, first, the radius fixing plate 2 and the guide block 5 will be described.
  • the radius fixing plate guide block 5 is a member that guides the fixing screw 4 when the radius fixing plate 2 is fixed to the radius 3 with the fixing screw 4.
  • the radius fixing plate 2 straddles the fractured portion 3a of the radius 3 and is fixed to the radius 3.
  • the guide block 5 is placed on the radius fixing plate 2 in an overlapping manner. After being placed in this way, it is placed on the radius 3 and pre-formed in the radius 3, for example, so that the fixing screw 4 can be inserted in the specified direction by using the screw guide hole 5d of the guide block 5.
  • the screw tightening work is performed on the radius 3 while guiding in cooperation with the prepared hole.
  • the guide block 5 is removed from the radius fixing plate 2 by using the guide block release tool 31 according to the embodiment of the present invention.
  • the fractured portion 3a of the radius 3 is divided into a radius main body 3b and a fracture piece 3c with the fractured portion 3a as a boundary.
  • the radius body 3b and the fracture fragment 3c may be completely separated or partially connected.
  • the radius fixing plate 2 is placed on the radius 3 so that the fracture piece 3c is normally connected to the radius body 3b and fixed.
  • the radius fixing plate 2 is made of a synthetic resin, for example, a thermoplastic resin or a composite material thereof, for example.
  • thermoplastic resins include PEEK (polyetheretherketone) or polyetherimide.
  • the radius fixation plate 2 is composed of a wide distal region 2a and a proximal region 2b extending from the distal region 2a to form a T-shaped plate member.
  • proximal region means the region of the radius fixation plate 2 that is closer to the heart
  • distal region is the radius fixation plate 2.
  • the distal region 2a is fixed to the fracture piece 3c with a plurality of fixing screws 4, the proximal region 2b is fixed to the radius body 3b with a plurality of fixing screws 4, and the fractured portion 3a is straddled by the radius fixing plate 2.
  • the fracture piece 3c is fixed so as to be normally connected to the radial body 3b.
  • a large number of circular screw insertion holes 2d extending in the axial direction in the thickness direction of the radius fixing plate 2 or in the direction inclined with respect to the thickness direction are formed, respectively. ing. If necessary, a fixing screw 4 is inserted into the screw insertion hole 2d, and the fixing screw 4 is screwed into both a part of the screw insertion hole 2d of the radius fixing plate 2 and the radius 3 so that the radius fixing plate 2 Is fixed to the radius 3.
  • the fixing screw 4 inserted into the screw insertion hole 2d is made of hard metal and has a head 4c and a shaft having a male screw connected to the head 4c and screwed into the radius 3. It is composed of a part 4a.
  • the guide block 5 is placed on and held on the radius fixing plate 2 and then placed on the radius 3, and then the fixing screw is used with the radius fixing plate fixing screw tool.
  • the fixing screw 4 is guided to facilitate the screw tightening work.
  • the guide block 5 can be made of synthetic resin.
  • the outer shape of the guide block 5 has the same outer shape as the radius fixing plate 2 as shown in FIGS. 2A to 3B, and covers the entire radius fixing plate 2 and makes it easier to stack.
  • the back surface of the guide block 5 (the surface in contact with the radius fixing plate 2) is, for example, the surface of the radius fixing plate 2 (that is, the surface opposite to the surface in contact with the radius 3) and the guide block 5 The shape corresponds to the contact surface).
  • the radius fixation plate guide block 5 includes at least a distal portion 5x and a proximal portion 5y.
  • the distal portion 5x has a wide shape that can be placed in the distal region 2a of the radius fixing plate 2, and has a screw guide hole 5d of the fixing screw 4 that communicates with the screw insertion hole 2d of the radius fixing plate 2. I have more than one.
  • the distal portion 5x is formed to cover all, almost, or partially cover the distal region 2a of the radius fixation plate 2 when placed on the distal region 2a of the radius fixation plate 2. There is.
  • the proximal portion 5y has an elongated shape that can be placed in the proximal region 2b of the radius fixing plate 2, and has a plurality of screw guide holes 5d of the fixing screw 4 that communicate with the screw insertion holes 2d of the radius fixing plate 2. I have one.
  • the proximal portion 5y is formed so as to cover all, almost, or partially cover the proximal region 2b of the radius fixation plate 2 when placed on the proximal region 2b of the radius fixation plate 2. There is.
  • proximal portion means the portion of the guide block 5 closer to the heart as in the radial fixation plate 2, and the “distal portion” is used. , The portion of the guide block 5 that is farther from the heart as compared to the proximal portion.
  • the thickness of the guide block 5 is made thicker than the thickness of the radius fixing plate 2 to facilitate guiding the fixing screw 4.
  • the thickness of the radius fixing plate 2 is 2.4 mm
  • the thickness of the guide block 5 is 6 mm, which is about three times that thickness.
  • the thickness of the guide block 5 may be the same as or substantially the same as the thickness of the radius fixing plate 2. Even in such a case, the fixing screw 4 can be guided by the thickness of the guide block 5 as compared with the case of only the radius fixing plate 2.
  • the distal portion 5a and the proximal portion 5b are respectively in the thickness direction of the guide block 5 or in the direction inclined with respect to the thickness direction, in other words, in the thickness direction or the thickness direction of the radius fixing plate 2.
  • a large number of circular screw guide holes 5d extending in the axial direction are formed in the inclined direction.
  • Each screw guide hole 5d is formed and arranged corresponding to each screw insertion hole 2d. Therefore, a plurality of adjacent screw guide holes 5d are formed and arranged in the distal portion 5a or the proximal portion 5b, or both the distal portion 5a and the proximal portion 5b so as to intersect each other diagonally. be able to.
  • each screw guide hole 5d includes axial guidance when tightening the fixing screw 4 to be inserted into the screw insertion hole 2d and depth regulation of the fixing screw 4, as well as a function as a base for other surgical tools. Also demonstrates.
  • the guide block 5 itself can also function as a base when used by inserting various other instruments used at the time of surgery.
  • the radius fixing plate 2 When the radius fixing plate 2 is placed on the radius 3, the radius fixing plate 2 also bends along the radius 3. At this time, the radius fixing plate 2 is set so that the proximal region 2b is flexed relative to the distal region 2a.
  • the distal portion 5x and the proximal portion 5y are arranged so as to be relatively movable, that is, relatively flexible so that the guide block 5 also bends in response to such bending of the radius fixing plate 2.
  • the distal portion 5x and the proximal portion 5y are integrally configured while being connected by a connecting portion 20 such as some means or a member.
  • the distal portion 5x and the proximal portion 5y may be connected by a thin flexible portion 21 so as to be relatively movable.
  • a groove 22 having at least half the thickness of the guide block 5 is formed with the distal portion 5x and the proximal portion 5y. It may be formed between the spaces and from one end to the other in the width direction, and a thin flexible portion 21 may be formed as the remaining portion on the back surface side.
  • the thickness of the thin flexible portion 21 is, for example, 1/3 of the thickness of the guide block 5.
  • the distal portion 5x and the proximal portion 5y can be made relatively flexible, and can follow the bending of the radius fixing plate 2.
  • the dimension of the thin flexible portion 21 in the width direction has, for example, a width of about the dimension in the width direction of the proximal portion 5y.
  • a holding claw 5c that can be locked and held on the outer peripheral edge of the radial fixing plate 2 is provided on the outer peripheral edge of the back surface of the guide block 5 (that is, the surface on the radial fixing plate side).
  • Two holding claws 5c are arranged on both side edges in the width direction intersecting the direction. If the holding claws 5c are arranged at these three places, the holding claws 5c can be held in a well-balanced and reliable manner.
  • each holding claw 5c has a locking projection 5t protruding in a J-shape or an inverted J-shape of each holding claw 5c in the thickness direction T of the guide block 5.
  • the locking projection 5t is securely locked at the boundary between the laterally convexly curved side surface 2q of the radius fixing plate 2 intersecting the thickness direction T and the bottom surface 2r that contacts or faces the radius 3. It protrudes as much as possible. However, the locking projection 5t is prevented from contacting the bottom surface 2r that contacts the radius 3 so as not to interfere with the proper position holding of the radius fixing plate 2 and the radius 3.
  • Auxiliary holding claws 5r are arranged on the remaining edge of the guide block 5, except for the connecting portion 20 between the distal portion 5x and the proximal portion 5y.
  • the reason for excluding the connecting portion 20 is to ensure the flexibility of the connecting portion 20.
  • the auxiliary holding claw 5r also has a locking projection 5t like the holding claw 5c.
  • the opposite edges of the proximal portion 5y along the longitudinal direction are used to ensure the holding in the proximal portion 5y. Arrange so as to face each other.
  • the arrangement of the distal portion 5x of the auxiliary holding claw 5r as shown in FIG. 2B, along the width direction orthogonal to the longitudinal direction of the distal portion 5x in order to more reliably hold the auxiliary holding claw 5r. (Ie, the edge between the pair of holding claws 5c of the distal portion 5x).
  • the arrangement of the holding claw 5c at the edge of the guide block 5 or the arrangement of the holding claw 5c and the auxiliary holding claw 5r is as shown in FIG. 2B with respect to the central axis in the longitudinal direction of the guide block 5 when viewed from the back surface side. If they are arranged symmetrically, the holding force can be exerted in a well-balanced manner with respect to the radial fixation plate 2.
  • a detachable groove 5q for removal formed by, for example, a rectangular notch is formed at one position on the edge of the proximal portion 5y.
  • the detachment groove 5q is formed so that the boundary between the radius fixing plate 2 and the guide block 5 is exposed. Therefore, for example, a raspatorium or a spatula is inserted into the detachment groove 5q from the lateral direction of the guide block 5 and inserted into the boundary between the radius fixing plate 2 and the guide block 5, and the radius fixing plate 2 and the guide block 5 are inserted.
  • each holding claw 5c and each auxiliary holding claw 5r near the detachment groove 5q can be started to be released. Then, insert a raspatorium or spatula laterally into the boundary between the remaining portion of the radius fixing plate 2 and the guide block 5, or remove the guide block 5 from the radius fixing plate 2 by hand or the like. The holding force of the holding claw 5c and the auxiliary holding claw 5r is released, and the guide block 5 can be detached from the radius fixing plate 2 and removed.
  • this method as described above, when it is necessary to insert the raspatorium or the like between the guide block 5 and the radius fixing plate 2 from the lateral direction of the guide block 5 and to minimize the incision area of the arm. Had the problem that it could not be used.
  • the guide block release tool 31 will be described.
  • the guide block release tools 31A and 31B according to the first and second embodiments will be described.
  • the guide block release tool 31A is composed of a single release member including at least a rod-shaped coupling member 33 and a rod-shaped extrusion member 34. ing.
  • the coupling member 33 is coupled to the coupling portion 32 of the guide block 5 to bond the guide block 5 and the release tool 31A.
  • the connecting portion 32 is composed of a female screw portion 5j formed in a through hole 5i for a release tool formed at at least one place in the distal portion 5x or the proximal portion 5y of the guide block 5.
  • the through hole 5i is a groove of the distal portion 5x in a direction in which the axial direction intersects the surface of the radius fixing plate 2, that is, the guide block facing surface 2i (for example, a direction substantially orthogonal to each other). It is formed in the vicinity of 22 and in the vicinity of the groove 22 in the proximal portion 5y, respectively.
  • the through hole 5i of the proximal portion 5y is positioned away from the detachment groove 5q described later, and the detachable portions are arranged apart from each other.
  • the surface of the radius fixing plate 2 facing the tip opening of the through hole 5i, that is, the guide block facing surface 2i is not a hole but a surface, and the surface can be pressed by the extrusion member 34 described later.
  • the connecting member 33 is composed of a male screw portion 33a screwed into the female screw portion 5j.
  • the coupling member 33 is fixed to the tip of the rod-shaped tool body 36.
  • the tool body 36 is configured to be rotatable by being grasped by a hand.
  • the extrusion member 34 is composed of a cylindrical extrusion portion 34a fixed to the tip of the coupling member 33 along the axial direction of the tool body portion 36, and is capable of penetrating through the through hole 5i.
  • the male screw portion 33a of the coupling member 33 is screwed into the female screw portion 5j of the through hole 5i of the guide block 5, for example, about 2 to 3 threads, and the coupling member 33 is screwed into the guide block 5
  • the extruded portion 34a penetrates and protrudes from the through hole 5i.
  • the tip surface of the extruded portion 34a presses and contacts the guide block facing surface 2i of the radius fixing plate 2, and the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened.
  • the male screw portion 33a is further screwed into the female screw portion 5j, the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is further widened.
  • the diameter of the cylindrical body is smaller than the diameter of the male screw portion 33a so that the through hole 5i can be freely penetrated.
  • the tip surface of the extruded portion 34a can be pressed and contacted with the guide block facing surface 2i of the radius fixing plate 2 as a flat surface, but the present invention is not limited to this, and a curved convex surface or a hemispherical convex surface may be used.
  • the guide block 5 penetrates from the upper side to the lower side, in other words, from the region incised at the time of arranging the guide block 5.
  • the tip of the extrusion portion 34a of the release tool 31A is inserted into the hole 5i, and the entire release tool 31A is rotated so that the male screw portion 33a is screwed to the female screw portion 5j of the guide block 5.
  • the release tool 31A is further rotated, for example, 2 to 3 times, and as shown in FIG. 6B, the tip of the extrusion portion 34a arrives at the tip of the through hole 5i and comes into contact with the guide block facing surface 2i. do.
  • the release tool 31A is further rotated 3 to 4 times, for example, and as shown in FIGS. 6C and 6D, the tip of the extruded portion 34a protrudes from the tip of the through hole 5i to guide the radius fixing plate 2.
  • the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened, and the holding by the holding claw 5c or the auxiliary holding claw 5r begins to be released.
  • the portion to be pressed for the detachment operation that is, the point of action, is located between the guide block facing surface 2i and the bottom surface 5k of the guide block 5, making it easier to detach.
  • the portion pressed by the release tool 31A becomes the starting point at which the guide block 5 begins to separate from the radius fixing plate 2.
  • a raspatorium or a spatula is inserted laterally at the boundary between the radius fixing plate 2 and the distal portion 5x of the guide block 5.
  • the holding force of each holding claw 5c and the auxiliary holding claw 5r near the detachment groove 5q can be released.
  • the proximal portion 5y may be detached by using a raspatorium, a spatula, or the like without using the detaching tool 31A.
  • the guide block 5 may be smoothly and surely detached from the radius fixing plate 2 by using the detaching tool 31A in the proximal portion 5y as well as the distal portion 5x.
  • the proximal portion 5y may be detached first.
  • the release tool 31A is formed on the extruded portion 34a that freely penetrates the through hole 5i at the tip portion and the outer surface near the tip portion, and has a female screw portion 5j, for example, at least. It is composed of a single rod-shaped detaching member having about 2 to 3 threads and a male screw portion 33a that can be screwed. According to such a configuration, in a state where the male screw portion 33a is connected to the guide block 5, the guide block 5 is not from the lateral direction but from the upper side to the lower side of the guide block 5, in other words, when the guide block 5 is arranged.
  • the extrusion portion 34a can press-contact the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5.
  • the work of removing the guide block 5 from the radius fixing plate 2 can be easily and surely performed, and it is not necessary to provide the radius fixing plate 2 with a special configuration.
  • the guide block release tool 31B includes at least a tubular connecting member 33 and a linear extruded member 34 instead of a single member. In preparation, it is composed of two members.
  • the coupling member 33 is coupled to the coupling portion 32 of the guide block 5 to bond the guide block 5 and the release tool 31B.
  • the connecting portion 32 is formed in the through hole 5i for the detaching tool, which is formed at at least one place in the distal portion 5x or the proximal portion 5y of the guide block 5, as in the first embodiment. It can be composed of a female screw portion 5j.
  • the coupling member 33 is, for example, a tubular member 33b having a through hole 33d, and a male threaded portion 33c screwed into the female threaded portion 5j is formed on the outer surface of a small-diameter tip portion of the tubular member 33b.
  • a male screw portion 33c is formed in a region on the rear side of the small-diameter tip portion of the tubular member 33b, and a male screw portion is formed in a region on the tip portion side.
  • the cylindrical portion having a small diameter smaller than the diameter of the male screw portion 33c is left as the guide portion 33f with respect to the through hole 5i of the guide block 5.
  • the guide portion 33f makes it possible to smoothly insert the tubular member 33b into the through hole 5i.
  • the present invention is not limited to this, and the male screw portion 33c may be formed in all the regions of the tip portion.
  • the tubular member 33b is configured to be rotatable by being grasped by a hand.
  • the tubular member 33b has a small diameter tubular portion having a through hole 33d up to the tip end portion and the vicinity of the tip end portion of the tubular member 33b, and the central portion has a large diameter and thin thickness tubular portion.
  • the rear end portion is a large-diameter and thin-thick cylinder portion having the following sliding hole 33e to reduce the weight.
  • the tubular member 33b is not limited to this, and as shown in FIGS. 7D and 7E, the tip portion and the vicinity of the tip portion have the same configuration, and the central portion has a large diameter and a large thickness.
  • a large-diameter and thin-thick cylinder portion having a sliding hole 33e only at the rear end portion may be used.
  • the extrusion member 34 is composed of a linear extrusion portion 34b in which the through hole 33d in the tubular member 33b is movable.
  • a columnar pressing portion 34e is fixed to the rear end of the extruded portion 34b, and the pressing portion 34e is slidably fitted in the sliding hole 33e of the rear end portion of the tubular member 33b.
  • the pressing portion 34e When the pressing portion 34e is manually pushed into the sliding hole 33e toward the tip side in the axial direction with respect to the tubular member 33b, the pressing portion 34e penetrates the through hole 33d of the tubular member 33b and is extruded from the male screw portion 33c at the tip portion.
  • the tip of 34b protrudes and presses and contacts the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the guide block 5.
  • the pressing portion 34e is manually pulled toward the rear end side in the axial direction in the sliding hole 33e with respect to the tubular member 33b, the tip of the extruded portion 34b is pulled into the male screw portion 33c at the tip of the tubular member 33b. Is done.
  • the tip surface of the extruded portion 34b can be pressed and contacted with the guide block facing surface 2i of the radius fixing plate 2 as a flat surface, but the present invention is not limited to this, and a curved convex surface or a hemispherical convex surface may be used.
  • the pressing portion 34e has the following configuration, for example, so as not to inadvertently pop out from the inside of the sliding hole 33e. That is, the ball plunger 37 that pushes the ball outward by the spring is arranged on the pressing portion 34e in the direction orthogonal to the axis. As a result, a constant frictional force is generated between the sliding hole 33e and the inner peripheral surface of the sliding hole 33e, and a constant resistance force acts between the pressing portion 34e and the inner peripheral surface of the sliding hole 33e. ..
  • the guide block is located from the upper side to the lower side of the guide block 5, in other words, from the region incised at the time of arranging the guide block 5.
  • the release tool 31B is inserted into the through hole 5i of 5 from the male threaded portion 33c at the tip of the tubular member 33b or from the extruded portion 34b slightly protruding from the male threaded portion 33c to rotate the tubular member 33b.
  • the male screw portion 33c is screwed to the female screw portion 5j of the guide block 5.
  • the tubular member 33b is further continuously rotated, and as shown in FIG. 8C, the male screw portion 33c is screwed to the female screw portion 5j, and no further rotation is possible.
  • the pressing portion 34e is pushed into the sliding hole 33e toward the tip side in the axial direction with respect to the tubular member 33b, so that the extruded portion 34b is pushed out from the through hole 33d of the tubular member 33b. It is extruded so that the tip of the extruded portion 34b is brought into contact with the guide block facing surface 2i.
  • the extruded portion 34b is pushed out by further pushing the pressing portion 34e against the tubular member 33b toward the tip side in the axial direction in the sliding hole 33e, and as shown in FIGS. 8F and 8G, the extruded portion 34b of the extruded portion 34b.
  • the tip is pressed into contact with the guide block facing surface 2i of the radius fixing plate 2.
  • the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened to start releasing the holding by the holding claw 5c or the auxiliary holding claw 5r.
  • the portion to be pressed for the detachment operation that is, the point of action, is located between the guide block facing surface 2i and the bottom surface 5k of the guide block 5, making it easier to detach.
  • the portion pressed by the release tool 31B becomes the starting point at which the guide block 5 begins to separate from the radius fixing plate 2.
  • a raspatorium or a spatula is inserted laterally at the boundary between the radius fixing plate 2 and the distal portion 5x of the guide block 5.
  • the holding force of each holding claw 5c and the auxiliary holding claw 5r near the detachment groove 5q can be released.
  • the proximal portion 5y may be detached by using a raspatorium, a spatula, or the like without using the release tool 31B.
  • the guide block 5 may be smoothly and surely detached from the radius fixing plate 2 by using the detaching tool 31B in the proximal portion 5y as well as the distal portion 5x.
  • the proximal portion 5y may be detached first.
  • the release tool 31B is composed of a tubular member 33b having a male screw portion 33c at the tip portion and a linear extruded portion 34b in which the through hole 33d in the tubular member 33b is movable. is doing.
  • the guide block 5 in a state where the male screw portion 33c is connected to the guide block 5, the guide block 5 is not from the lateral direction but from the upper side to the lower side of the guide block 5, in other words, when the guide block 5 is arranged.
  • the extrusion portion 34b can press-contact the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5.
  • the work of removing the guide block 5 from the radius fixing plate 2 can be easily and surely performed, and it is not necessary to provide the radius fixing plate 2 with a special configuration.
  • the guide block release tool has a radius fixing plate guide block that guides a fixing screw that is placed and held on the radius fixing plate and rotated to fix the radius fixing plate to the radius. It can be easily and surely detached from the fixed plate.

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Abstract

A guide block separation tool 31A, 31B is for separating a guide block 5 held by a radius fixing plate 2 from the radius fixing plate and is provided with: a connection member 33 that is connected to a connection portion 32 of the guide block and thereby connected to the guide block; and a pushing member 34 that is brought into contact with and pressed against a guide block facing surface 2i of the radius fixing plate downwardly from above the guide block while the connection member is connected to the guide block, thereby expanding the distance between the guide block facing surface and the guide block.

Description

ガイドブロック用離脱具Detachment tool for guide block
　本発明は、橈骨固定プレート上に載置保持して橈骨固定プレートを橈骨に固定するために回転させる固定ネジを案内する、橈骨固定プレート用ガイドブロックを橈骨固定プレートから離脱させるときに使用するガイドブロック用離脱具に関する。 The present invention guides a fixing screw that is placed and held on the radius fixing plate and rotated to fix the radius fixing plate to the radius, and is used when the guide block for the radius fixing plate is separated from the radius fixing plate. Regarding the release tool for blocks.
　橈骨が骨折したとき、橈骨の骨折部分を固定するため、副木（すなわち副子）又は石膏製若しくはＦＲＰ製のギブスに代わって、骨折付近の腕を部分的に切開し、骨折部分を跨いで橈骨を固定する橈骨固定プレートが知られている。 When the radius is fractured, a splint (ie, splint) or a plaster cast or FRP cast is replaced by a partial incision in the arm near the fracture to secure the fractured part of the radius, straddling the fractured part. Radial fixation plates for fixing the radius are known.
　橈骨固定プレートを橈骨に固定するとき、橈骨に対して複数本の固定ネジを橈骨にネジ締めして固定している。 When fixing the radius fixing plate to the radius, multiple fixing screws are screwed to the radius to fix it.
　橈骨固定プレートは、従来は、強靱かつ軽量でかつ生体安全性の高いチタンもしくはその合金などの薄い金属製の板が使用されている。 Conventionally, a thin metal plate such as titanium or an alloy thereof, which is tough, lightweight, and has high biosafety, has been used as the radius fixing plate.
　しかしながら、金属製の板では、Ｘ線が透過せず、橈骨固定プレートで覆われた骨折部分の状態を把握できないといった問題がある。 However, the metal plate does not allow X-rays to pass through, and there is a problem that the state of the fractured part covered with the radius fixing plate cannot be grasped.
　そこで、近年、金属製に代わり、薄い樹脂製の橈骨固定プレートが開発されている。 Therefore, in recent years, a thin resin radial fixation plate has been developed instead of metal.
　このような樹脂製の橈骨固定プレートを橈骨に固定ネジで固定するとき、橈骨固定プレートが薄いため、橈骨固定プレートに設けられた各雌ネジに対して、規定された方向(例えばプレート表面に対して垂直な方向)で固定ネジを刺入できずに、雌ネジの破損につながる可能性がある。また、橈骨固定プレートに対する固定ネジの刺入方向は、橈骨の形態に合うように事前に設計されているので、それ以外の方向に固定ネジが刺入されると、雌ネジの破損が無くとも、橈骨固定プレートとしての機能発揮に支障を来す可能性がある。 When such a resin-made radius fixing plate is fixed to the radius with fixing screws, the radius fixing plate is thin, so that each female screw provided on the radius fixing plate has a specified direction (for example, with respect to the plate surface). The fixing screw cannot be inserted in the vertical direction), which may lead to damage to the female screw. In addition, the insertion direction of the fixing screw to the radius fixing plate is designed in advance to match the shape of the radius, so if the fixing screw is inserted in any other direction, the female screw will not be damaged. , May interfere with the functioning as a radial fixation plate.
　このような雌ネジの破損を防止するとともに橈骨固定プレートとしての機能発揮のため、橈骨固定プレートの遠位領域にガイドブロックを載置して、固定ネジを、規定された方向に刺入できるようにガイドブロックで案内させるものが考案されている（例えば、特許文献１参照。）。 In order to prevent such damage to the female screw and to exert its function as a radius fixing plate, a guide block is placed in the distal region of the radius fixing plate so that the fixing screw can be inserted in the specified direction. Have been devised to guide the user with a guide block (see, for example, Patent Document 1).
米国特許8523919号U.S. Pat. No. 8523919
　ところで、橈骨固定プレートの遠位領域にガイドブロックを載置するとき、位置ずれしないように、橈骨固定プレートに対してガイドブロックを雄ネジでネジ止めしていた。 By the way, when the guide block was placed in the distal region of the radius fixing plate, the guide block was screwed to the radius fixing plate with a male screw so that the position would not shift.
　しかしながら、そのような構成では、橈骨固定プレートを橈骨に固定したのち、橈骨固定プレートからガイドブロックを取り外すとき、雄ネジを緩める必要があり、取り外し作業が煩雑であった。また、雄ネジによる固定のため、橈骨固定プレートに雄ネジ専用の雌ネジ部が特別に必要となり、橈骨固定プレートの強度低下の要因となっていた。 However, in such a configuration, after fixing the radius fixing plate to the radius, when removing the guide block from the radius fixing plate, it is necessary to loosen the male screw, and the removal work is complicated. In addition, since it is fixed with a male screw, a female screw portion dedicated to the male screw is specially required for the radius fixing plate, which has been a factor of reducing the strength of the radius fixing plate.
　そこで、雄ネジの代わりに、ガイドブロックの外周縁に保持爪を複数個配置し、保持爪で橈骨固定プレートに取り外し可能に保持させる一方、保持爪の保持を解除してガイドブロックを橈骨固定プレートから取り外すことが考えられる。 Therefore, instead of the male screw, a plurality of holding claws are arranged on the outer peripheral edge of the guide block so that the holding claws can be detachably held by the radius fixing plate, while the holding claws are released and the guide block is held by the radius fixing plate. It is conceivable to remove it from.
　このとき、ガイドブロックを橈骨固定プレートに保持したのち、ガイドブロックを橈骨固定プレートから取り外すとき、ガイドブロックと橈骨固定プレートとの間にラスパトリウムなどの工具をガイドブロックの横方向から挿入して、橈骨固定プレートからガイドブロックを離脱させることが必要となる。 At this time, after holding the guide block on the radius fixing plate, when removing the guide block from the radius fixing plate, a tool such as raspatorium is inserted between the guide block and the radius fixing plate from the lateral direction of the guide block. It is necessary to remove the guide block from the radial fixation plate.
　しかしながら、ラスパトリウムなどは、ガイドブロックと橈骨固定プレートとの間にガイドブロックの横方向から挿入する必要があり、腕の切開領域を最小化したい場合には、問題があった。 However, it is necessary to insert raspatorium between the guide block and the radial fixation plate from the lateral direction of the guide block, and there is a problem when it is desired to minimize the incision area of the arm.
　従って、本発明の目的は、前記課題を解決するものであって、ガイドブロックの横方向からではなく、ガイドブロックの上側から下向きに、言い換えれば、ガイドブロックの配置時点で切開されている領域から、ガイドブロックと橈骨固定プレートとの間に容易に差し込むことができて橈骨固定プレートからのガイドブロックの取り外し作業が簡単にかつ確実に行うことができる、ガイドブロック用離脱具を提供することにある。 Therefore, an object of the present invention is to solve the above-mentioned problems, and not from the lateral direction of the guide block, but from the upper side to the lower side of the guide block, in other words, from the region incised at the time of arranging the guide block. , To provide a guide block release tool that can be easily inserted between the guide block and the radius fixing plate to easily and reliably remove the guide block from the radius fixing plate. ..
　前記目的を達成するために、本発明の１つの態様によれば、橈骨固定プレートに保持されたガイドブロックを前記橈骨固定プレートから離脱させるガイドブロック用離脱具であって、
　前記ガイドブロックの結合部に結合して前記ガイドブロックと結合する結合部材と、
　前記結合部材で前記ガイドブロックに結合した状態で、前記ガイドブロックの上側から下向きに前記橈骨固定プレートのガイドブロック対向面に押圧接触して、前記ガイドブロック対向面と前記ガイドブロックとの間隔を広げる押出部材とを備える、ガイドブロック用離脱具を提供する。 In order to achieve the above object, according to one aspect of the present invention, the guide block detaching tool for detaching the guide block held by the radius fixing plate from the radius fixing plate.
A coupling member that is coupled to the coupling portion of the guide block and is coupled to the guide block,
In a state of being coupled to the guide block by the connecting member, the guide block is pressed and contacted downward from the upper side with the guide block facing surface of the radius fixing plate to widen the distance between the guide block facing surface and the guide block. Provided is a release tool for a guide block provided with an extrusion member.
　本発明の前記態様によれば、結合部材で離脱具をガイドブロックに結合した状態で、ガイドブロックの横方向からではなく、ガイドブロックの上側から下向きに、言い換えれば、ガイドブロックの配置時点で切開されている領域から、押出部材により、橈骨固定プレートのガイドブロック対向面に押圧接触して、ガイドブロック対向面とガイドブロックとの間隔を容易にかつ確実に広げることができる。この結果、橈骨固定プレートからのガイドブロックの取り外し作業が簡単にかつ確実に行うことができ、橈骨固定プレートに特別な構成を設ける必要がない。 According to the above aspect of the present invention, in the state where the release tool is connected to the guide block by the connecting member, the incision is made not from the lateral direction of the guide block but from the upper side of the guide block downward, in other words, at the time of arranging the guide block. From the region, the extrusion member can press-contact the guide block facing surface of the radius fixing plate to easily and surely widen the distance between the guide block facing surface and the guide block. As a result, the work of removing the guide block from the radius fixing plate can be easily and surely performed, and it is not necessary to provide a special configuration for the radius fixing plate.
　本発明のこれらと他の目的と特徴は、添付された図面についての実施形態に関連した次の記述から明らかになる。この図面においては、
橈骨固定プレート用ガイドブロックを使用しつつ固定ネジで橈骨固定プレートを橈骨に固定したのち、本発明の実施形態にかかるガイドブロック用離脱具を使用して、橈骨固定プレート用ガイドブロックを橈骨固定プレートから離脱させた状態を示す一部透過斜視図 橈骨固定プレートに載置するガイドブロックの平面図 図２Ａのガイドブロックの底面図 橈骨上で、図２Ａのガイドブロックを樹脂製の橈骨固定プレートに載置保持した状態の連結部近傍の斜め上側から見た斜視図 橈骨上で、図２Ａのガイドブロックを樹脂製の橈骨固定プレートに載置保持した状態の連結部近傍の斜め下側から見た斜視図 図２Ａのガイドブロックの２つの係止突起の説明図 第１実施形態にかかるガイドブロック用離脱具の斜視図 図５Ａの離脱具の右側面図 図５ＢのＣ－Ｃ線断面図 図５Ａの離脱具の先端部の拡大正面図 図５Ａの離脱具の使用状態の説明図 図５Ａの離脱具の使用状態の説明図 図５Ａの離脱具の使用状態の説明図 図５Ａの離脱具の使用状態の説明図 第２実施形態にかかるガイドブロック用離脱具の斜視図 図７Ａの離脱具の右側面図 図７ＢのＣ－Ｃ線断面図 図７Ａの第２実施形態の変形例にかかる離脱具において、図７ＢのＣ－Ｃ線断面図に相当する断面図 図７Ｄの第２実施形態の変形例にかかる離脱具の一部透過説明図 図７Ａ及び図７Ｄの離脱具の先端部の拡大正面図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 図７Ａ及び図７Ｄの離脱具の使用状態の説明図 These and other objects and features of the present invention will become apparent from the following statements relating to embodiments for the accompanying drawings. In this drawing
After fixing the radius fixing plate to the radius with a fixing screw while using the guide block for the radius fixing plate, the guide block for the radius fixing plate is fixed to the radius fixing plate by using the guide block release tool according to the embodiment of the present invention. Partially transparent perspective view showing the state of being separated from Top view of the guide block to be placed on the radial fixation plate Bottom view of the guide block of FIG. 2A A perspective view of the guide block of FIG. 2A placed and held on a resin-made radius fixing plate on the radius from an obliquely upper side in the vicinity of the connecting portion. A perspective view of the guide block of FIG. 2A placed and held on a resin-made radius fixing plate on the radius from an obliquely lower side in the vicinity of the connecting portion. Explanatory drawing of two locking projections of the guide block of FIG. 2A Perspective view of the guide block release tool according to the first embodiment Right side view of the release tool of FIG. 5A Cross-sectional view taken along the line CC of FIG. 5B Enlarged front view of the tip of the release tool of FIG. 5A Explanatory drawing of the use state of the detaching tool of FIG. 5A Explanatory drawing of the use state of the detaching tool of FIG. 5A Explanatory drawing of the use state of the detaching tool of FIG. 5A Explanatory drawing of the use state of the detaching tool of FIG. 5A Perspective view of the guide block release tool according to the second embodiment. Right side view of the release tool of FIG. 7A Cross-sectional view taken along the line CC of FIG. 7B FIG. 7B is a cross-sectional view corresponding to the cross-sectional view taken along the line CC of FIG. 7B in the detaching tool according to the modified example of the second embodiment of FIG. 7A. Partial transmission explanatory view of the detaching tool according to the modified example of the second embodiment of FIG. 7D. Enlarged front view of the tip of the release tool of FIGS. 7A and 7D. Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D Explanatory drawing of the use state of the release tool of FIGS. 7A and 7D
　以下、図面を参照して本発明における実施形態を詳細に説明する。
　本発明の記述を続ける前に、添付図面において同じ部品については同じ参照符号を付している。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Prior to continuing the description of the present invention, the same parts are designated by the same reference numerals in the accompanying drawings.
　本発明の実施形態にかかるガイドブロック用離脱具３１は、橈骨固定プレート２に保持されたガイドブロック５を橈骨固定プレート２から離脱させる工具である。このガイドブロック用離脱具３１を説明する前に、まず、橈骨固定プレート２とガイドブロック５となどについて説明する。 The guide block release tool 31 according to the embodiment of the present invention is a tool for detaching the guide block 5 held by the radius fixing plate 2 from the radius fixing plate 2. Before explaining the guide block release tool 31, first, the radius fixing plate 2 and the guide block 5 will be described.
　橈骨固定プレート用ガイドブロック５は、図１～図４に示すように、橈骨固定プレート２を橈骨３に固定ネジ４で固定するとき、固定ネジ４を案内する部材である。 As shown in FIGS. 1 to 4, the radius fixing plate guide block 5 is a member that guides the fixing screw 4 when the radius fixing plate 2 is fixed to the radius 3 with the fixing screw 4.
　まず、橈骨固定プレート２と固定ネジ４とを説明したのち、ガイドブロック５について説明する。 First, the radius fixing plate 2 and the fixing screw 4 will be described, and then the guide block 5 will be described.
　図１に示すように、橈骨固定プレート２は、橈骨３の骨折部分３ａをまたいで橈骨３に固定する。このとき、図示しない橈骨固定プレート固定ネジ用工具で固定ネジ４を回転させる、ネジ締め作業を行いやすくするため、なガイドブロック５を橈骨固定プレート２に重ねて載置している。このように載置したのち、橈骨３上に配置し、ガイドブロック５のネジ案内穴５ｄを利用して固定ネジ４を、規定された方向に刺入できるように、例えば、橈骨３に予め形成された下穴と協働で案内しつつネジ締め作業を橈骨３に対して行っている。橈骨固定プレート２を橈骨３に固定したのちは、ガイドブロック５は橈骨固定プレート２から、本発明の一実施形態にかるガイドブロック用離脱具３１を使用して取り外される。 As shown in FIG. 1, the radius fixing plate 2 straddles the fractured portion 3a of the radius 3 and is fixed to the radius 3. At this time, in order to facilitate the screw tightening work in which the fixing screw 4 is rotated by a tool for fixing the radius fixing plate (not shown), the guide block 5 is placed on the radius fixing plate 2 in an overlapping manner. After being placed in this way, it is placed on the radius 3 and pre-formed in the radius 3, for example, so that the fixing screw 4 can be inserted in the specified direction by using the screw guide hole 5d of the guide block 5. The screw tightening work is performed on the radius 3 while guiding in cooperation with the prepared hole. After fixing the radius fixing plate 2 to the radius 3, the guide block 5 is removed from the radius fixing plate 2 by using the guide block release tool 31 according to the embodiment of the present invention.
　橈骨３の骨折部分３ａは、図１に示すように、ここでは、骨折部分３ａを境にして、橈骨本体３ｂと骨折片３ｃとに区分されている。橈骨本体３ｂと骨折片３ｃとに完全に分離されている場合もあるし、部分的につながっている場合もある。 As shown in FIG. 1, the fractured portion 3a of the radius 3 is divided into a radius main body 3b and a fracture piece 3c with the fractured portion 3a as a boundary. The radius body 3b and the fracture fragment 3c may be completely separated or partially connected.
　橈骨固定プレート２は、橈骨本体３ｂに対して骨折片３ｃが正常につながっている状態で固定されるように、橈骨３上に載置されている。 The radius fixing plate 2 is placed on the radius 3 so that the fracture piece 3c is normally connected to the radius body 3b and fixed.
　橈骨固定プレート２は、一例として合成樹脂、例えば熱可塑性樹脂又はその複合材で構成されている。熱可塑性樹脂の例としては、ＰＥＥＫ（ポリエーテルエーテルケトン）又はポリエーテルイミドがある。 The radius fixing plate 2 is made of a synthetic resin, for example, a thermoplastic resin or a composite material thereof, for example. Examples of thermoplastic resins include PEEK (polyetheretherketone) or polyetherimide.
　一例として、橈骨固定プレート２は、幅広の遠位領域２ａと、遠位領域２ａから延びた近位領域２ｂとでＴ字状板部材を構成している。ここで、本明細書において、「近位領域」とは、橈骨固定プレート２のうち、心臓に対してより近い方の領域を意味し、「遠位領域」とは、橈骨固定プレート２のうち、近位領域と比較して、心臓に対してより遠い方の領域を意味する。 As an example, the radius fixation plate 2 is composed of a wide distal region 2a and a proximal region 2b extending from the distal region 2a to form a T-shaped plate member. Here, in the present specification, the "proximal region" means the region of the radius fixation plate 2 that is closer to the heart, and the "distal region" is the radius fixation plate 2. , Means the region farther from the heart compared to the proximal region.
　遠位領域２ａは、骨折片３ｃに複数の固定ネジ４で固定され、近位領域２ｂは、橈骨本体３ｂに複数の固定ネジ４で固定されて、骨折部分３ａを橈骨固定プレート２がまたぐとともに橈骨本体３ｂに対して骨折片３ｃが正常につながっている状態となるように固定されている。 The distal region 2a is fixed to the fracture piece 3c with a plurality of fixing screws 4, the proximal region 2b is fixed to the radius body 3b with a plurality of fixing screws 4, and the fractured portion 3a is straddled by the radius fixing plate 2. The fracture piece 3c is fixed so as to be normally connected to the radial body 3b.
　遠位領域２ａと近位領域２ｂとには、それぞれ、橈骨固定プレート２の厚み方向、又は、厚み方向に対して傾斜した方向に軸方向が延在する円形のネジ挿入穴２ｄが多数形成されている。必要に応じて、ネジ挿入穴２ｄには固定ネジ４が挿入され、固定ネジ４が橈骨固定プレート２のネジ挿入穴２ｄの一部と橈骨３との両方にネジ込まれて、橈骨固定プレート２を橈骨３に固定する。 In the distal region 2a and the proximal region 2b, a large number of circular screw insertion holes 2d extending in the axial direction in the thickness direction of the radius fixing plate 2 or in the direction inclined with respect to the thickness direction are formed, respectively. ing. If necessary, a fixing screw 4 is inserted into the screw insertion hole 2d, and the fixing screw 4 is screwed into both a part of the screw insertion hole 2d of the radius fixing plate 2 and the radius 3 so that the radius fixing plate 2 Is fixed to the radius 3.
　図１に示すように、ネジ挿入穴２ｄに挿入される固定ネジ４は、硬質金属製であって、頭部４ｃと、頭部４ｃに接続されて橈骨３にネジ込まれる雄ネジを有する軸部４ａとで構成されている。 As shown in FIG. 1, the fixing screw 4 inserted into the screw insertion hole 2d is made of hard metal and has a head 4c and a shaft having a male screw connected to the head 4c and screwed into the radius 3. It is composed of a part 4a.
　図２Ａ～図３Ｂに示すように、ガイドブロック５は、橈骨固定プレート２に重ねて載置されて保持されたのち、橈骨３に載置し、その後、橈骨固定プレート固定ネジ用工具で固定ネジ４を回転させてネジ締め作業を行うとき、固定ネジ４を案内して、ネジ締め作業を行いやすくしている。 As shown in FIGS. 2A to 3B, the guide block 5 is placed on and held on the radius fixing plate 2 and then placed on the radius 3, and then the fixing screw is used with the radius fixing plate fixing screw tool. When the screw tightening work is performed by rotating 4, the fixing screw 4 is guided to facilitate the screw tightening work.
　ガイドブロック５は、合成樹脂で構成することができる。 The guide block 5 can be made of synthetic resin.
　ガイドブロック５の外形は、一例として、図２Ａ～図３Ｂに示すように、橈骨固定プレート２と同じ外形として、橈骨固定プレート２の全体を覆うとともに重ねやすくしている。ガイドブロック５の裏面（橈骨固定プレート２に接触する面）は、一例として、橈骨固定プレート２の表面（すなわち、橈骨３に接触する面とは反対側の面であり、かつ、ガイドブロック５に接触する面）に対応した形状としている。 As an example, the outer shape of the guide block 5 has the same outer shape as the radius fixing plate 2 as shown in FIGS. 2A to 3B, and covers the entire radius fixing plate 2 and makes it easier to stack. The back surface of the guide block 5 (the surface in contact with the radius fixing plate 2) is, for example, the surface of the radius fixing plate 2 (that is, the surface opposite to the surface in contact with the radius 3) and the guide block 5 The shape corresponds to the contact surface).
　橈骨固定プレート用ガイドブロック５は、少なくとも、遠位部５ｘと、近位部５ｙとを備えている。 The radius fixation plate guide block 5 includes at least a distal portion 5x and a proximal portion 5y.
　遠位部５ｘは、橈骨固定プレート２の遠位領域２ａに載置可能な幅広の形状であって、かつ橈骨固定プレート２のネジ挿入穴２ｄに連通する固定ネジ４のネジ案内穴５ｄを、複数個、有している。遠位部５ｘは、橈骨固定プレート２の遠位領域２ａに載置するとき、橈骨固定プレート２の遠位領域２ａをすべて覆うか、ほとんど覆うか、又は、部分的に覆うように形成している。 The distal portion 5x has a wide shape that can be placed in the distal region 2a of the radius fixing plate 2, and has a screw guide hole 5d of the fixing screw 4 that communicates with the screw insertion hole 2d of the radius fixing plate 2. I have more than one. The distal portion 5x is formed to cover all, almost, or partially cover the distal region 2a of the radius fixation plate 2 when placed on the distal region 2a of the radius fixation plate 2. There is.
　近位部５ｙは、橈骨固定プレート２の近位領域２ｂに載置可能な細長い形状であって、かつ橈骨固定プレート２のネジ挿入穴２ｄに連通する固定ネジ４のネジ案内穴５ｄを、複数個、有している。近位部５ｙは、橈骨固定プレート２の近位領域２ｂに載置するとき、橈骨固定プレート２の近位領域２ｂをすべて覆うか、ほとんど覆うか、又は、部分的に覆うように形成している。 The proximal portion 5y has an elongated shape that can be placed in the proximal region 2b of the radius fixing plate 2, and has a plurality of screw guide holes 5d of the fixing screw 4 that communicate with the screw insertion holes 2d of the radius fixing plate 2. I have one. The proximal portion 5y is formed so as to cover all, almost, or partially cover the proximal region 2b of the radius fixation plate 2 when placed on the proximal region 2b of the radius fixation plate 2. There is.
　ここで、本明細書において、「近位部」とは、橈骨固定プレート２と同様に、ガイドブロック５のうち、心臓に対してより近い方の部分を意味し、「遠位部」とは、ガイドブロック５のうち、近位部と比較して、心臓に対してより遠い方の部分を意味する。 Here, in the present specification, the "proximal portion" means the portion of the guide block 5 closer to the heart as in the radial fixation plate 2, and the "distal portion" is used. , The portion of the guide block 5 that is farther from the heart as compared to the proximal portion.
　ガイドブロック５の厚さは、一例として、橈骨固定プレート２の厚さよりも厚くして、固定ネジ４を案内しやすくしている。このような場合、一例として、橈骨固定プレート２の厚さは２．４ｍｍに対して、ガイドブロック５の厚さはその約３倍の６ｍｍとする。ただし、別の例として、ガイドブロック５の厚さは橈骨固定プレート２の厚さと同じ又はほぼ同じとしてもよい。そのような場合でも、橈骨固定プレート２だけの場合よりも、ガイドブロック５の厚さの分だけ、固定ネジ４を案内することができる。 As an example, the thickness of the guide block 5 is made thicker than the thickness of the radius fixing plate 2 to facilitate guiding the fixing screw 4. In such a case, as an example, the thickness of the radius fixing plate 2 is 2.4 mm, and the thickness of the guide block 5 is 6 mm, which is about three times that thickness. However, as another example, the thickness of the guide block 5 may be the same as or substantially the same as the thickness of the radius fixing plate 2. Even in such a case, the fixing screw 4 can be guided by the thickness of the guide block 5 as compared with the case of only the radius fixing plate 2.
　遠位部５ａと近位部５ｂとには、それぞれ、ガイドブロック５の厚み方向、又は、厚み方向に対して傾斜した方向に、言い換えれば、橈骨固定プレート２の厚み方向、又は、厚み方向に対して傾斜した方向に、軸方向が延在する円形のネジ案内穴５ｄが多数形成されている。各ネジ案内穴５ｄは、各ネジ挿入穴２ｄに対応して形成配置されている。よって、遠位部５ａ、又は近位部５ｂ、又は遠位部５ａと近位部５ｂとの両方に、隣接した複数のネジ案内穴５ｄを、互いに斜めに交差するような方向に形成配置することができる。 The distal portion 5a and the proximal portion 5b are respectively in the thickness direction of the guide block 5 or in the direction inclined with respect to the thickness direction, in other words, in the thickness direction or the thickness direction of the radius fixing plate 2. On the other hand, a large number of circular screw guide holes 5d extending in the axial direction are formed in the inclined direction. Each screw guide hole 5d is formed and arranged corresponding to each screw insertion hole 2d. Therefore, a plurality of adjacent screw guide holes 5d are formed and arranged in the distal portion 5a or the proximal portion 5b, or both the distal portion 5a and the proximal portion 5b so as to intersect each other diagonally. be able to.
　各ネジ案内穴５ｄの機能としては、ネジ挿入穴２ｄに挿入する固定ネジ４をネジ締めするときの軸方向の案内及び固定ネジ４の深度規制に加えて、他の手術工具の土台としての機能も発揮する。 The functions of each screw guide hole 5d include axial guidance when tightening the fixing screw 4 to be inserted into the screw insertion hole 2d and depth regulation of the fixing screw 4, as well as a function as a base for other surgical tools. Also demonstrates.
　ガイドブロック５自体としては、固定ネジ４に対する、このような機能の他、手術時に使用する他の種々の器具を差し込むなどして使用するときの土台として機能させることもできる。 In addition to such a function for the fixing screw 4, the guide block 5 itself can also function as a base when used by inserting various other instruments used at the time of surgery.
　橈骨固定プレート２を橈骨３に配置するとき、橈骨３に沿って橈骨固定プレート２も撓む。このとき、橈骨固定プレート２は遠位領域２ａに対して近位領域２ｂが相対的に撓むようにしている。このような橈骨固定プレート２の撓みに対応してガイドブロック５も撓むように、遠位部５ｘと近位部５ｙとは、相対的に移動可能に、すなわち、相対的に撓み可能に配置されている。そのような配置の例としては、何らかの手段又は部材のような連結部２０で、遠位部５ｘと近位部５ｙとが連結されつつ一体的に構成されている。 When the radius fixing plate 2 is placed on the radius 3, the radius fixing plate 2 also bends along the radius 3. At this time, the radius fixing plate 2 is set so that the proximal region 2b is flexed relative to the distal region 2a. The distal portion 5x and the proximal portion 5y are arranged so as to be relatively movable, that is, relatively flexible so that the guide block 5 also bends in response to such bending of the radius fixing plate 2. There is. As an example of such an arrangement, the distal portion 5x and the proximal portion 5y are integrally configured while being connected by a connecting portion 20 such as some means or a member.
　連結部２０の一例として、図２Ａ～図３Ｂに示すように、遠位部５ｘと近位部５ｙとは、相対的に移動可能に薄肉の可撓部２１で連結するようにしてもよい。この場合には、ガイドブロック５の表面側（すなわち、橈骨接触面とは反対側の面）から、ガイドブロック５の厚さの少なくとも半分以上の溝２２を遠位部５ｘと近位部５ｙとの間でかつ幅方向の端から端まで形成して、裏面側に残りの部分として薄肉の可撓部２１を形成すればよい。薄肉の可撓部２１の厚さは、例えば、ガイドブロック５の厚さの１／３とする。この可撓部２１により、遠位部５ｘと近位部５ｙとは、相対的に撓み可能とすることができ、橈骨固定プレート２の撓みに追随することができる。なお、薄肉の可撓部２１の幅方向の寸法は、例えば、近位部５ｙの幅方向の寸法程度の幅を有している。 As an example of the connecting portion 20, as shown in FIGS. 2A to 3B, the distal portion 5x and the proximal portion 5y may be connected by a thin flexible portion 21 so as to be relatively movable. In this case, from the surface side of the guide block 5 (that is, the surface opposite to the radial contact surface), a groove 22 having at least half the thickness of the guide block 5 is formed with the distal portion 5x and the proximal portion 5y. It may be formed between the spaces and from one end to the other in the width direction, and a thin flexible portion 21 may be formed as the remaining portion on the back surface side. The thickness of the thin flexible portion 21 is, for example, 1/3 of the thickness of the guide block 5. With this flexible portion 21, the distal portion 5x and the proximal portion 5y can be made relatively flexible, and can follow the bending of the radius fixing plate 2. The dimension of the thin flexible portion 21 in the width direction has, for example, a width of about the dimension in the width direction of the proximal portion 5y.
　また、ガイドブロック５の裏面（すなわち、橈骨固定プレート側の面）の外周縁には、図２Ｂ～図３Ｂに示すように、橈骨固定プレート２の外周縁に係止保持可能な保持爪５ｃを少なくとも３個有している。すなわち、図２Ｂの右端である、近位部５ｙの長手方向の端縁に１個の保持爪５ｃを配置し、図２Ｂの左側である、遠位部５ｘの長手方向の端縁でかつ長手方向と交差する幅方向の両側の端縁に２個の保持爪５ｃを配置している。この３か所に保持爪５ｃを配置すれば、バランス良くかつ確実に保持することができる。 Further, as shown in FIGS. 2B to 3B, a holding claw 5c that can be locked and held on the outer peripheral edge of the radial fixing plate 2 is provided on the outer peripheral edge of the back surface of the guide block 5 (that is, the surface on the radial fixing plate side). I have at least three. That is, one holding claw 5c is arranged at the longitudinal end edge of the proximal portion 5y, which is the right end of FIG. 2B, and is the longitudinal end edge and longitudinal of the distal portion 5x, which is the left end of FIG. 2B. Two holding claws 5c are arranged on both side edges in the width direction intersecting the direction. If the holding claws 5c are arranged at these three places, the holding claws 5c can be held in a well-balanced and reliable manner.
　各保持爪５ｃは、図４に示すように、ガイドブロック５の厚さ方向Ｔにおいて各保持爪５ｃのＪ字状又は逆Ｊ字状に突出した係止突起５ｔを有している。係止突起５ｔは、橈骨固定プレート２の、厚さ方向Ｔと交差する横方向の外向き凸に湾曲した側面２ｑと、橈骨３に接触又は対向する底面２ｒとの境界部分に確実に係止できるように突出している。ただし、係止突起５ｔは、橈骨３に接触する底面２ｒには接触しないようにして、橈骨固定プレート２と橈骨３との適切な位置保持を妨げないようにしている。 As shown in FIG. 4, each holding claw 5c has a locking projection 5t protruding in a J-shape or an inverted J-shape of each holding claw 5c in the thickness direction T of the guide block 5. The locking projection 5t is securely locked at the boundary between the laterally convexly curved side surface 2q of the radius fixing plate 2 intersecting the thickness direction T and the bottom surface 2r that contacts or faces the radius 3. It protrudes as much as possible. However, the locking projection 5t is prevented from contacting the bottom surface 2r that contacts the radius 3 so as not to interfere with the proper position holding of the radius fixing plate 2 and the radius 3.
　ガイドブロック５の残りの端縁には、遠位部５ｘと近位部５ｙとの連結部２０を除き、補助保持爪５ｒを配置している。連結部２０を除く理由は、連結部２０での可撓性を確保するためである。補助保持爪５ｒも、保持爪５ｃと同様に、係止突起５ｔを有することが好ましい。補助保持爪５ｒの近位部５ｙの配置の例としては、近位部５ｙでの保持をより確実にするため、図２Ｂに示すように、近位部５ｙの長手方向沿いの対向する端縁に、対向するように配置する。補助保持爪５ｒの遠位部５ｘの配置の例としては、遠位部５ｘでの保持をより確実にするため、図２Ｂに示すように、遠位部５ｘの長手方向と直交する幅方向沿いの端縁（すなわち、遠位部５ｘの一対の保持爪５ｃ間の端縁）に複数個配置する。 Auxiliary holding claws 5r are arranged on the remaining edge of the guide block 5, except for the connecting portion 20 between the distal portion 5x and the proximal portion 5y. The reason for excluding the connecting portion 20 is to ensure the flexibility of the connecting portion 20. It is preferable that the auxiliary holding claw 5r also has a locking projection 5t like the holding claw 5c. As an example of the arrangement of the proximal portion 5y of the auxiliary holding claw 5r, as shown in FIG. 2B, the opposite edges of the proximal portion 5y along the longitudinal direction are used to ensure the holding in the proximal portion 5y. Arrange so as to face each other. As an example of the arrangement of the distal portion 5x of the auxiliary holding claw 5r, as shown in FIG. 2B, along the width direction orthogonal to the longitudinal direction of the distal portion 5x in order to more reliably hold the auxiliary holding claw 5r. (Ie, the edge between the pair of holding claws 5c of the distal portion 5x).
　ガイドブロック５の端縁における保持爪５ｃの配置、又は、保持爪５ｃと補助保持爪５ｒの配置は、図２Ｂのように裏面側から見て、ガイドブロック５の長手方向の中心軸に対して左右対称に配置すれば、橈骨固定プレート２に対して、バランス良く保持力を発揮することができる。 The arrangement of the holding claw 5c at the edge of the guide block 5 or the arrangement of the holding claw 5c and the auxiliary holding claw 5r is as shown in FIG. 2B with respect to the central axis in the longitudinal direction of the guide block 5 when viewed from the back surface side. If they are arranged symmetrically, the holding force can be exerted in a well-balanced manner with respect to the radial fixation plate 2.
　このように、橈骨固定プレート２にガイドブロック５を保持させる手段として、ガイドブロック５側からネジを差し込んで橈骨固定プレート２の雌ネジ部にネジ締めする場合には、保持用のネジ締め作業をやり直したり、ネジ締め作業自体に失敗すると、樹脂製の橈骨固定プレート２の雌ネジ部が破損してしまい、橈骨固定プレート２を橈骨３から取り外して破棄しなければならず、煩雑であり、手術時間が長引くなどの課題がある。これに対して、保持爪５ｃ又は保持爪５ｃと補助保持爪５ｒとを使用すれば、爪の保持力を解除すれば、何度でもやり直すことができ、かつ、樹脂製の橈骨固定プレート２を破損させることもない。 In this way, as a means for holding the guide block 5 on the radius fixing plate 2, when a screw is inserted from the guide block 5 side and screwed to the female screw portion of the radius fixing plate 2, the holding screw tightening operation is performed. If it is redone or the screw tightening work itself fails, the female screw portion of the resin-made radius fixing plate 2 will be damaged, and the radius fixing plate 2 must be removed from the radius 3 and discarded, which is complicated and requires surgery. There are issues such as prolonged time. On the other hand, if the holding claw 5c or the holding claw 5c and the auxiliary holding claw 5r are used, it can be redone as many times as necessary by releasing the holding force of the claw, and the resin-made radius fixing plate 2 can be used. It will not be damaged.
　また、図２Ａ～図３Ｂに示すように、近位部５ｙの端縁の１ケ所に、例えば長方形の切欠で形成された取外用の離脱溝５ｑを形成している。離脱溝５ｑには、橈骨固定プレート２とガイドブロック５との境目が露出されるように形成されている。よって、この離脱溝５ｑ内に、例えばラスパトリウム又はヘラなどをガイドブロック５の横方向から挿入し、橈骨固定プレート２とガイドブロック５との境目に差し込んで、橈骨固定プレート２とガイドブロック５とを離すようにねじれば、離脱溝５ｑ近くの各保持爪５ｃ及び各補助保持爪５ｒの保持力を解除し始めることができる。そして、残りの部分の橈骨固定プレート２とガイドブロック５との境目にもラスパトリウム又はヘラなどを横方向から挿入するか、手などでガイドブロック５を橈骨固定プレート２から取り外すことで、さらに他の保持爪５ｃ及び補助保持爪５ｒの保持力を解除して、橈骨固定プレート２からガイドブロック５を離脱させて取り外すことができる。ただし、この方法では、前記したように、ラスパトリウムなどは、ガイドブロック５と橈骨固定プレート２との間にガイドブロック５の横方向から挿入する必要があり、腕の切開領域を最小化したい場合には、使用できないという問題があった。 Further, as shown in FIGS. 2A to 3B, a detachable groove 5q for removal formed by, for example, a rectangular notch is formed at one position on the edge of the proximal portion 5y. The detachment groove 5q is formed so that the boundary between the radius fixing plate 2 and the guide block 5 is exposed. Therefore, for example, a raspatorium or a spatula is inserted into the detachment groove 5q from the lateral direction of the guide block 5 and inserted into the boundary between the radius fixing plate 2 and the guide block 5, and the radius fixing plate 2 and the guide block 5 are inserted. By twisting so as to separate the two, the holding force of each holding claw 5c and each auxiliary holding claw 5r near the detachment groove 5q can be started to be released. Then, insert a raspatorium or spatula laterally into the boundary between the remaining portion of the radius fixing plate 2 and the guide block 5, or remove the guide block 5 from the radius fixing plate 2 by hand or the like. The holding force of the holding claw 5c and the auxiliary holding claw 5r is released, and the guide block 5 can be detached from the radius fixing plate 2 and removed. However, in this method, as described above, when it is necessary to insert the raspatorium or the like between the guide block 5 and the radius fixing plate 2 from the lateral direction of the guide block 5 and to minimize the incision area of the arm. Had the problem that it could not be used.
　そこで、ガイドブロック５の横方向からではなく、ガイドブロック５の上側から下向きに、言い換えれば、ガイドブロック５の配置時点で切開されている領域から、ガイドブロック５と橈骨固定プレート２との間に容易に差し込むことができて橈骨固定プレート２からのガイドブロック５の取り外し作業が簡単にかつ確実に行うことができるために発明されたのが、以下の、本発明の実施形態にかかるガイドブロック用離脱具３１である。 Therefore, not from the lateral direction of the guide block 5, but from the upper side to the lower side of the guide block 5, in other words, from the region incised at the time of arranging the guide block 5, between the guide block 5 and the radius fixing plate 2. The following guide block according to the embodiment of the present invention was invented because it can be easily inserted and the guide block 5 can be easily and surely removed from the radius fixing plate 2. The release tool 31.
　以下、ガイドブロック用離脱具３１について説明する。ここでは、ガイドブロック用離脱具３１として、第１及び第２実施形態にかかるガイドブロック用離脱具３１Ａ，３１Ｂを説明する。 Hereinafter, the guide block release tool 31 will be described. Here, as the guide block release tool 31, the guide block release tools 31A and 31B according to the first and second embodiments will be described.
　第１実施形態にかかるガイドブロック用離脱具３１Ａは、図５Ａ～図５Ｄに示すように、棒状の結合部材３３と、棒状の押出部材３４とを少なくとも備えている単一の離脱部材で構成されている。 As shown in FIGS. 5A to 5D, the guide block release tool 31A according to the first embodiment is composed of a single release member including at least a rod-shaped coupling member 33 and a rod-shaped extrusion member 34. ing.
　結合部材３３は、ガイドブロック５の結合部３２に結合して、ガイドブロック５と離脱具３１Ａとを結合する。 The coupling member 33 is coupled to the coupling portion 32 of the guide block 5 to bond the guide block 5 and the release tool 31A.
　結合部３２は、一例として、ガイドブロック５の遠位部５ｘ又は近位部５ｙにおいて、少なくとも１ケ所に形成された、離脱具用の貫通穴５ｉに形成された雌ネジ部５ｊで構成することができる。具体的な一例としては、図２Ａでは、貫通穴５ｉは、軸方向が橈骨固定プレート２の表面すなわちガイドブロック対向面２ｉと交差する方向（例えば大略直交する方向）に、遠位部５ｘの溝２２の近傍と、近位部５ｙの溝２２の近傍とに、それぞれ形成されている。近位部５ｙの貫通穴５ｉは、後述する離脱溝５ｑとは離れた位置として、離脱可能な箇所を互いに離して配置するのが好ましい。貫通穴５ｉの先端開口と対向する橈骨固定プレート２の表面すなわちガイドブロック対向面２ｉは、穴ではなく、面で構成されて、後述する押出部材３４で当該面を押圧可能としている。 As an example, the connecting portion 32 is composed of a female screw portion 5j formed in a through hole 5i for a release tool formed at at least one place in the distal portion 5x or the proximal portion 5y of the guide block 5. Can be done. As a specific example, in FIG. 2A, the through hole 5i is a groove of the distal portion 5x in a direction in which the axial direction intersects the surface of the radius fixing plate 2, that is, the guide block facing surface 2i (for example, a direction substantially orthogonal to each other). It is formed in the vicinity of 22 and in the vicinity of the groove 22 in the proximal portion 5y, respectively. It is preferable that the through hole 5i of the proximal portion 5y is positioned away from the detachment groove 5q described later, and the detachable portions are arranged apart from each other. The surface of the radius fixing plate 2 facing the tip opening of the through hole 5i, that is, the guide block facing surface 2i is not a hole but a surface, and the surface can be pressed by the extrusion member 34 described later.
　結合部材３３は、一例として、この雌ネジ部５ｊにネジ込まれる雄ネジ部３３ａで構成している。結合部材３３は、棒状の工具本体部３６の先端に、固定されている。工具本体部３６は、手でつかんで回転可能に構成されている。 As an example, the connecting member 33 is composed of a male screw portion 33a screwed into the female screw portion 5j. The coupling member 33 is fixed to the tip of the rod-shaped tool body 36. The tool body 36 is configured to be rotatable by being grasped by a hand.
　押出部材３４は、一例として、工具本体部３６の軸方向沿いに結合部材３３の先端に固定されている円柱体の押出部３４ａで構成し、貫通穴５ｉを貫通可能としている。ガイドブロック５の上側から下向きに、結合部材３３の雄ネジ部３３ａがガイドブロック５の貫通穴５ｉの雌ネジ部５ｊに、例えば２～３山程度、ネジ込まれて結合部材３３がガイドブロック５に結合した状態で、雄ネジ部３３ａがさらに雌ネジ部５ｊにネジ込まれると、貫通穴５ｉから押出部３４ａが貫通して突出するようにしている。この結果、押出部３４ａの先端面が橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触して、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔を広げることになる。雄ネジ部３３ａがさらに雌ネジ部５ｊにネジ込まれると、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔をさらに広げることになる。 As an example, the extrusion member 34 is composed of a cylindrical extrusion portion 34a fixed to the tip of the coupling member 33 along the axial direction of the tool body portion 36, and is capable of penetrating through the through hole 5i. From the upper side to the lower side of the guide block 5, the male screw portion 33a of the coupling member 33 is screwed into the female screw portion 5j of the through hole 5i of the guide block 5, for example, about 2 to 3 threads, and the coupling member 33 is screwed into the guide block 5 When the male screw portion 33a is further screwed into the female screw portion 5j in the state of being coupled to the through hole 5i, the extruded portion 34a penetrates and protrudes from the through hole 5i. As a result, the tip surface of the extruded portion 34a presses and contacts the guide block facing surface 2i of the radius fixing plate 2, and the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened. When the male screw portion 33a is further screwed into the female screw portion 5j, the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is further widened.
　ここで、押出部３４ａは、円柱体の直径は雄ネジ部３３ａの直径より小さく、貫通穴５ｉを自在に貫通できるようにしている。押出部３４ａの先端面は、平面として橈骨固定プレート２のガイドブロック対向面２ｉに面で押圧接触可能としているが、これに限らず、湾曲凸面又は半球凸面でもよい。 Here, in the extruded portion 34a, the diameter of the cylindrical body is smaller than the diameter of the male screw portion 33a so that the through hole 5i can be freely penetrated. The tip surface of the extruded portion 34a can be pressed and contacted with the guide block facing surface 2i of the radius fixing plate 2 as a flat surface, but the present invention is not limited to this, and a curved convex surface or a hemispherical convex surface may be used.
　前記した構成にかかる離脱具３１Ａによれば、図６Ａに示すように、ガイドブロック５の上側から下向きに、言い換えれば、ガイドブロック５の配置時点で切開されている領域から、ガイドブロック５の貫通穴５ｉ内に離脱具３１Ａの押出部３４ａの先端を挿入して、離脱具３１Ａ全体を回転させて、雄ネジ部３３ａが、ガイドブロック５の雌ネジ部５ｊにネジ結合させる。 According to the release tool 31A according to the above configuration, as shown in FIG. 6A, the guide block 5 penetrates from the upper side to the lower side, in other words, from the region incised at the time of arranging the guide block 5. The tip of the extrusion portion 34a of the release tool 31A is inserted into the hole 5i, and the entire release tool 31A is rotated so that the male screw portion 33a is screwed to the female screw portion 5j of the guide block 5.
　その後、さらに離脱具３１Ａを、例えば２～３回、回転させ続けて、図６Ｂに示すように、押出部３４ａの先端が、貫通穴５ｉの先端に到着して、ガイドブロック対向面２ｉに接触する。 After that, the release tool 31A is further rotated, for example, 2 to 3 times, and as shown in FIG. 6B, the tip of the extrusion portion 34a arrives at the tip of the through hole 5i and comes into contact with the guide block facing surface 2i. do.
　その後、さらに離脱具３１Ａを、例えば３～４回、回転させ続けて、図６Ｃ及び図６Ｄに示すように、押出部３４ａの先端が、貫通穴５ｉの先端から突出し、橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触して、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔を押し広げて、保持爪５ｃ又は補助保持爪５ｒによる保持を解除し始める。このように、離脱動作のために押圧する箇所、すなわち、作用点が、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間にあることになり、より離脱させやすくしている。 After that, the release tool 31A is further rotated 3 to 4 times, for example, and as shown in FIGS. 6C and 6D, the tip of the extruded portion 34a protrudes from the tip of the through hole 5i to guide the radius fixing plate 2. By pressing and contacting the block facing surface 2i, the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened, and the holding by the holding claw 5c or the auxiliary holding claw 5r begins to be released. In this way, the portion to be pressed for the detachment operation, that is, the point of action, is located between the guide block facing surface 2i and the bottom surface 5k of the guide block 5, making it easier to detach.
　これにより、離脱具３１Ａで押圧する箇所が、橈骨固定プレート２からガイドブロック５が離脱し始める起点となる。このような動作を、例えば遠位部５ｘで行うと、残りの部分は、例えば、ラスパトリウム又はヘラなどを橈骨固定プレート２とガイドブロック５の遠位部５ｘとの境目に横方向から差し込んで、橈骨固定プレート２とガイドブロック５の遠位部５ｘとを離すようにねじれば、離脱溝５ｑ近くの各保持爪５ｃ及び補助保持爪５ｒの保持力を解除することができる。その後、近位部５ｙについては、離脱具３１Ａを使用せずに、ラスパトリウム又はヘラなどを使用して離脱させてもよい。又は、近位部５ｙについても、遠位部５ｘと同様に離脱具３１Ａを使用することにより、橈骨固定プレート２からガイドブロック５を円滑にかつ確実に離脱させるようにしてもよい。前記説明では、遠位部５ｘで最初に離脱させる場合を説明したが、逆に、近位部５ｙで最初に離脱させるようにしてもよい。 As a result, the portion pressed by the release tool 31A becomes the starting point at which the guide block 5 begins to separate from the radius fixing plate 2. When such an operation is performed, for example, in the distal portion 5x, for the remaining portion, for example, a raspatorium or a spatula is inserted laterally at the boundary between the radius fixing plate 2 and the distal portion 5x of the guide block 5. By twisting the radius fixing plate 2 and the distal portion 5x of the guide block 5 so as to separate them, the holding force of each holding claw 5c and the auxiliary holding claw 5r near the detachment groove 5q can be released. After that, the proximal portion 5y may be detached by using a raspatorium, a spatula, or the like without using the detaching tool 31A. Alternatively, the guide block 5 may be smoothly and surely detached from the radius fixing plate 2 by using the detaching tool 31A in the proximal portion 5y as well as the distal portion 5x. In the above description, the case where the distal portion 5x is first detached has been described, but conversely, the proximal portion 5y may be detached first.
　従って、前記第１実施形態によれば、離脱具３１Ａは、先端部に貫通穴５ｉを自在に貫通する押出部３４ａと、先端部近傍の外面に形成されて、雌ネジ部５ｊと、例えば少なくとも２～３山程度、ネジ結合可能な雄ネジ部３３ａとを有する単一の棒状の離脱部材で構成している。このような構成によれば、雄ネジ部３３ａでガイドブロック５に結合した状態で、ガイドブロック５の横方向からではなく、ガイドブロック５の上側から下向きに、言い換えれば、ガイドブロック５の配置時点で切開されている領域から、押出部３４ａにより、橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触して、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔を広げることができる。この結果、橈骨固定プレート２からのガイドブロック５の取り外し作業が簡単にかつ確実に行うことができ、橈骨固定プレート２に特別な構成を設ける必要がない。 Therefore, according to the first embodiment, the release tool 31A is formed on the extruded portion 34a that freely penetrates the through hole 5i at the tip portion and the outer surface near the tip portion, and has a female screw portion 5j, for example, at least. It is composed of a single rod-shaped detaching member having about 2 to 3 threads and a male screw portion 33a that can be screwed. According to such a configuration, in a state where the male screw portion 33a is connected to the guide block 5, the guide block 5 is not from the lateral direction but from the upper side to the lower side of the guide block 5, in other words, when the guide block 5 is arranged. From the region cut in, the extrusion portion 34a can press-contact the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5. As a result, the work of removing the guide block 5 from the radius fixing plate 2 can be easily and surely performed, and it is not necessary to provide the radius fixing plate 2 with a special configuration.
　一方、第２実施形態にかかるガイドブロック用離脱具３１Ｂは、図７Ａ～図７Ｆに示すように、単一の部材ではなく、筒状の結合部材３３と、線状の押出部材３４とを少なくとも備えて、２つの部材で構成されている。 On the other hand, as shown in FIGS. 7A to 7F, the guide block release tool 31B according to the second embodiment includes at least a tubular connecting member 33 and a linear extruded member 34 instead of a single member. In preparation, it is composed of two members.
　結合部材３３は、ガイドブロック５の結合部３２に結合して、ガイドブロック５と離脱具３１Ｂとを結合する。 The coupling member 33 is coupled to the coupling portion 32 of the guide block 5 to bond the guide block 5 and the release tool 31B.
　結合部３２は、一例として、第１実施形態と同様に、ガイドブロック５の遠位部５ｘ又は近位部５ｙにおいて、少なくとも１ケ所に形成された、離脱具用の貫通穴５ｉに形成された雌ネジ部５ｊで構成することができる。 As an example, the connecting portion 32 is formed in the through hole 5i for the detaching tool, which is formed at at least one place in the distal portion 5x or the proximal portion 5y of the guide block 5, as in the first embodiment. It can be composed of a female screw portion 5j.
　結合部材３３は、一例として、貫通穴３３ｄを有する筒部材３３ｂであり、雌ネジ部５ｊにネジ込まれる雄ネジ部３３ｃが、筒部材３３ｂの小径の先端部の外面に形成されている。一例としては、図７Ｆに拡大して示すように、筒部材３３ｂの小径の先端部のうちの後部側の領域に雄ネジ部３３ｃが形成され、先端部側の領域には雄ネジ部を形成せずに雄ネジ部３３ｃの直径よりも小さい小径の円筒部のままとして、ガイドブロック５の貫通穴５ｉに対する案内部３３ｆとしている。案内部３３ｆにより、筒部材３３ｂを貫通穴５ｉに円滑に挿入可能としている。しかしながら、これに限らず、先端部の全ての領域に雄ネジ部３３ｃが形成されていてもよい。筒部材３３ｂは、手でつかんで回転可能に構成されている。 The coupling member 33 is, for example, a tubular member 33b having a through hole 33d, and a male threaded portion 33c screwed into the female threaded portion 5j is formed on the outer surface of a small-diameter tip portion of the tubular member 33b. As an example, as shown enlarged in FIG. 7F, a male screw portion 33c is formed in a region on the rear side of the small-diameter tip portion of the tubular member 33b, and a male screw portion is formed in a region on the tip portion side. Instead, the cylindrical portion having a small diameter smaller than the diameter of the male screw portion 33c is left as the guide portion 33f with respect to the through hole 5i of the guide block 5. The guide portion 33f makes it possible to smoothly insert the tubular member 33b into the through hole 5i. However, the present invention is not limited to this, and the male screw portion 33c may be formed in all the regions of the tip portion. The tubular member 33b is configured to be rotatable by being grasped by a hand.
　筒部材３３ｂは、図７Ｃに示すように、筒部材３３ｂの先端部及び先端部近傍までは、貫通穴３３ｄを有する小径の筒部とし、中央部を大径でかつ薄い厚さの筒部とし、後端部は下記の摺動穴３３ｅを有する大径でかつ薄い厚さの筒部として、軽量化を図っている。しかしながら、筒部材３３ｂは、これに限るものではなく、図７Ｄ及び図７Ｅに示すように、先端部及び先端部近傍は同様な構成とし、中央部は大径で大きい厚さの筒部とし、後端部にのみ摺動穴３３ｅを有する大径でかつ薄い厚さの筒部としてもよい。 As shown in FIG. 7C, the tubular member 33b has a small diameter tubular portion having a through hole 33d up to the tip end portion and the vicinity of the tip end portion of the tubular member 33b, and the central portion has a large diameter and thin thickness tubular portion. The rear end portion is a large-diameter and thin-thick cylinder portion having the following sliding hole 33e to reduce the weight. However, the tubular member 33b is not limited to this, and as shown in FIGS. 7D and 7E, the tip portion and the vicinity of the tip portion have the same configuration, and the central portion has a large diameter and a large thickness. A large-diameter and thin-thick cylinder portion having a sliding hole 33e only at the rear end portion may be used.
　押出部材３４は、一例として、筒部材３３ｂ内の貫通孔３３ｄを移動自在な線状の押出部３４ｂで構成している。押出部３４ｂの後端には、円柱状の押圧部３４ｅが固定され、押圧部３４ｅが、筒部材３３ｂの後端部の摺動穴３３ｅ内で軸方向に摺動可能にはめ込まれている。筒部材３３ｂに対して押圧部３４ｅを摺動穴３３ｅ内で軸方向の先端側に手で押し込むと、筒部材３３ｂの貫通孔３３ｄを貫通して、先端部の雄ネジ部３３ｃから、押出部３４ｂの先端が突出し、橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触して、ガイドブロック対向面２ｉとガイドブロック５との間隔を広げる。一方、筒部材３３ｂに対して押圧部３４ｅを摺動穴３３ｅ内で軸方向の後端側に手で引くと、筒部材３３ｂの先端部の雄ネジ部３３ｃ内に押出部３４ｂの先端が引き込まれる。押出部３４ｂの先端面は、平面として橈骨固定プレート２のガイドブロック対向面２ｉに面で押圧接触可能としているが、これに限らず、湾曲凸面又は半球凸面でもよい。 As an example, the extrusion member 34 is composed of a linear extrusion portion 34b in which the through hole 33d in the tubular member 33b is movable. A columnar pressing portion 34e is fixed to the rear end of the extruded portion 34b, and the pressing portion 34e is slidably fitted in the sliding hole 33e of the rear end portion of the tubular member 33b. When the pressing portion 34e is manually pushed into the sliding hole 33e toward the tip side in the axial direction with respect to the tubular member 33b, the pressing portion 34e penetrates the through hole 33d of the tubular member 33b and is extruded from the male screw portion 33c at the tip portion. The tip of 34b protrudes and presses and contacts the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the guide block 5. On the other hand, when the pressing portion 34e is manually pulled toward the rear end side in the axial direction in the sliding hole 33e with respect to the tubular member 33b, the tip of the extruded portion 34b is pulled into the male screw portion 33c at the tip of the tubular member 33b. Is done. The tip surface of the extruded portion 34b can be pressed and contacted with the guide block facing surface 2i of the radius fixing plate 2 as a flat surface, but the present invention is not limited to this, and a curved convex surface or a hemispherical convex surface may be used.
　押圧部３４ｅは、摺動穴３３ｅ内から不用意に飛び出さないように、例えば、以下のような構成を有している。すなわち、バネでボールを外向きに押し付けるボールプランジャ３７を押圧部３４ｅに軸直交方向に配置している。これにより、摺動穴３３ｅの内周面との間に一定の摩擦力を発生させて、押圧部３４ｅと摺動穴３３ｅの内周面との間に一定の抵抗力が働くようにしている。 The pressing portion 34e has the following configuration, for example, so as not to inadvertently pop out from the inside of the sliding hole 33e. That is, the ball plunger 37 that pushes the ball outward by the spring is arranged on the pressing portion 34e in the direction orthogonal to the axis. As a result, a constant frictional force is generated between the sliding hole 33e and the inner peripheral surface of the sliding hole 33e, and a constant resistance force acts between the pressing portion 34e and the inner peripheral surface of the sliding hole 33e. ..
　前記した構成にかかる離脱具３１Ｂによれば、図８Ａ及び図８Ｂに示すように、ガイドブロック５の上側から下向きに、言い換えれば、ガイドブロック５の配置時点で切開されている領域から、ガイドブロック５の貫通穴５ｉ内に筒部材３３ｂの先端部の雄ネジ部３３ｃから、又は雄ネジ部３３ｃから少し突出した押出部３４ｂから、離脱具３１Ｂを挿入して、筒部材３３ｂを回転させて、雄ネジ部３３ｃをガイドブロック５の雌ネジ部５ｊにネジ結合させる。 According to the release tool 31B according to the above-described configuration, as shown in FIGS. 8A and 8B, the guide block is located from the upper side to the lower side of the guide block 5, in other words, from the region incised at the time of arranging the guide block 5. The release tool 31B is inserted into the through hole 5i of 5 from the male threaded portion 33c at the tip of the tubular member 33b or from the extruded portion 34b slightly protruding from the male threaded portion 33c to rotate the tubular member 33b. The male screw portion 33c is screwed to the female screw portion 5j of the guide block 5.
　その後、さらに筒部材３３ｂを回転させ続けて、図８Ｃに示すように、雄ネジ部３３ｃが雌ネジ部５ｊにネジ結合して、それ以上回転できなくなる。その後、図８Ｄ及び図８Ｅに示すように、筒部材３３ｂに対して押圧部３４ｅを摺動穴３３ｅ内で軸方向の先端側に押し込むことにより、筒部材３３ｂの貫通穴３３ｄから押出部３４ｂを押し出して、押出部３４ｂの先端をガイドブロック対向面２ｉに接触させる。 After that, the tubular member 33b is further continuously rotated, and as shown in FIG. 8C, the male screw portion 33c is screwed to the female screw portion 5j, and no further rotation is possible. After that, as shown in FIGS. 8D and 8E, the pressing portion 34e is pushed into the sliding hole 33e toward the tip side in the axial direction with respect to the tubular member 33b, so that the extruded portion 34b is pushed out from the through hole 33d of the tubular member 33b. It is extruded so that the tip of the extruded portion 34b is brought into contact with the guide block facing surface 2i.
　その後、さらに、筒部材３３ｂに対して押圧部３４ｅを摺動穴３３ｅ内で軸方向の先端側に押し込むことにより押出部３４ｂを押し出して、図８Ｆ及び図８Ｇに示すように、押出部３４ｂの先端が橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触させる。この結果、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔を押し広げて、保持爪５ｃ又は補助保持爪５ｒによる保持を解除し始める。このように、離脱動作のために押圧する箇所、すなわち、作用点が、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間にあることになり、より離脱させやすくしている。 After that, the extruded portion 34b is pushed out by further pushing the pressing portion 34e against the tubular member 33b toward the tip side in the axial direction in the sliding hole 33e, and as shown in FIGS. 8F and 8G, the extruded portion 34b of the extruded portion 34b. The tip is pressed into contact with the guide block facing surface 2i of the radius fixing plate 2. As a result, the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5 is widened to start releasing the holding by the holding claw 5c or the auxiliary holding claw 5r. In this way, the portion to be pressed for the detachment operation, that is, the point of action, is located between the guide block facing surface 2i and the bottom surface 5k of the guide block 5, making it easier to detach.
　これにより、離脱具３１Ｂで押圧する箇所が、橈骨固定プレート２からガイドブロック５が離脱し始める起点となる。このような動作を、例えば遠位部５ｘで行うと、残りの部分は、例えば、ラスパトリウム又はヘラなどを橈骨固定プレート２とガイドブロック５の遠位部５ｘとの境目に横方向から差し込んで、橈骨固定プレート２とガイドブロック５の遠位部５ｘとを離すようにねじれば、離脱溝５ｑ近くの各保持爪５ｃ及び補助保持爪５ｒの保持力を解除することができる。その後、近位部５ｙについては、離脱具３１Ｂを使用せずに、ラスパトリウム又はヘラなどを使用して離脱させてもよい。又は、近位部５ｙについても、遠位部５ｘと同様に離脱具３１Ｂを使用することにより、橈骨固定プレート２からガイドブロック５を円滑にかつ確実に離脱させるようにしてもよい。前記説明では、遠位部５ｘで最初に離脱させる場合を説明したが、逆に、近位部５ｙで最初に離脱させるようにしてもよい。 As a result, the portion pressed by the release tool 31B becomes the starting point at which the guide block 5 begins to separate from the radius fixing plate 2. When such an operation is performed, for example, in the distal portion 5x, for the remaining portion, for example, a raspatorium or a spatula is inserted laterally at the boundary between the radius fixing plate 2 and the distal portion 5x of the guide block 5. By twisting the radius fixing plate 2 and the distal portion 5x of the guide block 5 so as to separate them, the holding force of each holding claw 5c and the auxiliary holding claw 5r near the detachment groove 5q can be released. After that, the proximal portion 5y may be detached by using a raspatorium, a spatula, or the like without using the release tool 31B. Alternatively, the guide block 5 may be smoothly and surely detached from the radius fixing plate 2 by using the detaching tool 31B in the proximal portion 5y as well as the distal portion 5x. In the above description, the case where the distal portion 5x is first detached has been described, but conversely, the proximal portion 5y may be detached first.
　従って、前記第２実施形態によれば、離脱具３１Ｂは、先端部に雄ネジ部３３ｃを有する筒部材３３ｂと、筒部材３３ｂ内の貫通孔３３ｄを移動自在な線状の押出部３４ｂで構成している。このような構成によれば、雄ネジ部３３ｃでガイドブロック５に結合した状態で、ガイドブロック５の横方向からではなく、ガイドブロック５の上側から下向きに、言い換えれば、ガイドブロック５の配置時点で切開されている領域から、押出部３４ｂにより、橈骨固定プレート２のガイドブロック対向面２ｉに押圧接触して、ガイドブロック対向面２ｉとガイドブロック５の底面５ｋとの間隔を広げることができる。この結果、橈骨固定プレート２からのガイドブロック５の取り外し作業が簡単にかつ確実に行うことができ、橈骨固定プレート２に特別な構成を設ける必要がない。 Therefore, according to the second embodiment, the release tool 31B is composed of a tubular member 33b having a male screw portion 33c at the tip portion and a linear extruded portion 34b in which the through hole 33d in the tubular member 33b is movable. is doing. According to such a configuration, in a state where the male screw portion 33c is connected to the guide block 5, the guide block 5 is not from the lateral direction but from the upper side to the lower side of the guide block 5, in other words, when the guide block 5 is arranged. From the region cut in, the extrusion portion 34b can press-contact the guide block facing surface 2i of the radius fixing plate 2 to widen the distance between the guide block facing surface 2i and the bottom surface 5k of the guide block 5. As a result, the work of removing the guide block 5 from the radius fixing plate 2 can be easily and surely performed, and it is not necessary to provide the radius fixing plate 2 with a special configuration.
　なお、前記様々な実施形態又は変形例のうちの任意の実施形態又は変形例を適宜組み合わせることにより、それぞれの有する効果を奏するようにすることができる。また、実施形態同士の組み合わせ又は実施例同士の組み合わせ又は実施形態と実施例との組み合わせが可能であると共に、異なる実施形態又は実施例の中の特徴同士の組み合わせも可能である。
　本発明は、添付図面を参照しながら好ましい実施形態に関連して充分に記載されているが、この技術の熟練した人々にとっては種々の変形や修正は明白である。そのような変形や修正は、添付した請求の範囲による本発明の範囲から外れない限りにおいて、その中に含まれると理解されるべきである。 By appropriately combining any of the various embodiments or modifications, the effects of each can be achieved. Further, it is possible to combine embodiments or examples, or to combine embodiments and examples, and it is also possible to combine features in different embodiments or examples.
Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various modifications and modifications are obvious to those skilled in the art. It should be understood that such modifications and modifications are included within the scope of the invention as long as it does not deviate from the scope of the invention according to the appended claims.
　本発明の前記態様にかかるガイドブロック用離脱具は、橈骨固定プレート上に載置保持して橈骨固定プレートを橈骨に固定するために回転させる固定ネジを案内する、橈骨固定プレート用ガイドブロックを橈骨固定プレートから容易にかつ確実に離脱させることができる。 The guide block release tool according to the above aspect of the present invention has a radius fixing plate guide block that guides a fixing screw that is placed and held on the radius fixing plate and rotated to fix the radius fixing plate to the radius. It can be easily and surely detached from the fixed plate.
２　橈骨固定プレート
２ａ　遠位領域
２ｂ　近位領域
２ｄ　ネジ挿入穴
２ｉ　ガイドブロック対向面
２ｑ　側面
２ｒ　底面
３　橈骨
３ａ　骨折部分
３ｂ　橈骨本体
３ｃ　骨折片
４　固定ネジ
４ａ　軸部
４ｃ　頭部
５　ガイドブロック
５ａ　遠位部
５ｂ　近位部
５ｃ　保持爪
５ｄ　ネジ案内穴
５ｉ　貫通穴
５ｊ　雌ネジ部
５ｋ　底面
５ｑ　離脱溝
５ｒ　補助保持爪
５ｔ　係止突起
５ｘ　遠位部
５ｙ　近位部
２０　連結部
２１　薄肉の可撓部
２２　溝
３１、３１Ａ、３１Ｂ　ガイドブロック用離脱具
３２　結合部
３３　結合部材
３３ａ，３３ｃ　雄ネジ部
３３ｂ　筒部材
３３ｄ　貫通穴
３３ｅ　摺動穴
３３ｆ　案内部
３４　押出部材
３４ａ，３４ｂ　押出部
３４ｅ　押圧部
３６　工具本体部
３７　ボールプランジャ 2 Radius fixation plate 2a Distal region 2b Proximal region 2d Screw insertion hole 2i Guide block facing surface 2q Side surface 2r Bottom surface 3 Radius 3a Fracture part 3b Radius body 3c Fracture piece 4 Fixing screw 4a Shaft part 4c Head 5 Guide block 5a Far Position 5b Proximal 5c Holding claw 5d Screw guide hole 5i Through hole 5j Female thread 5k Bottom 5q Detachment groove 5r Auxiliary holding claw 5t Locking protrusion 5x Distal 5y Proximal 20 Connecting part 21 Thin flexible part 22 Grooves 31, 31A, 31B Detachment tool for guide block 32 Coupling part 33 Coupling member 33a, 33c Male screw part 33b Cylindrical member 33d Through hole 33e Sliding hole 33f Guide part 34 Extruding member 34a, 34b Extruding part 34e Pressing part 36 Tool Body 37 ball plunger

Claims (3)

  1. 　橈骨固定プレートに保持されたガイドブロックを前記橈骨固定プレートから離脱させるガイドブロック用離脱具であって、
    　前記ガイドブロックの結合部に結合して前記ガイドブロックと結合する結合部材と、
    　前記結合部材で前記ガイドブロックに結合した状態で、前記ガイドブロックの上側から下向きに前記橈骨固定プレートのガイドブロック対向面に押圧接触して、前記ガイドブロック対向面と前記ガイドブロックとの間隔を広げる押出部材とを備える、ガイドブロック用離脱具。     A guide block release tool for detaching the guide block held by the radius fixation plate from the radius fixation plate.
    A coupling member that is coupled to the coupling portion of the guide block and is coupled to the guide block,
    In a state of being coupled to the guide block by the connecting member, the guide block is pressed and contacted downward from the upper side with the guide block facing surface of the radius fixing plate to widen the distance between the guide block facing surface and the guide block. A release tool for a guide block provided with an extrusion member.
  2. 　前記結合部材と前記押出部材とは、単一の離脱部材で構成され、
    　前記ガイドブロックの前記結合部は、前記ガイドブロックの貫通穴に形成された雌ネジ部であり、
    　前記離脱部材は、先端部に押出部と、先端部近傍の外面に形成されて、前記雌ネジ部とネジ結合可能な雄ネジ部とを有する棒状部材であり、
    　前記離脱部材が回転して前記雄ネジ部が前記ガイドブロックの前記雌ネジ部にネジ結合して前記結合部材として機能したのち、前記押出部が前記貫通穴を貫通して突出し、前記橈骨固定プレートの前記ガイドブロック対向面に押圧接触して、前記ガイドブロック対向面と前記ガイドブロックとの間隔を広げて前記押出部材として機能する、
    　請求項１に記載のガイドブロック用離脱具。     The coupling member and the extrusion member are composed of a single release member.
    The joint portion of the guide block is a female screw portion formed in a through hole of the guide block.
    The detaching member is a rod-shaped member having an extruded portion at the tip portion and a male screw portion formed on an outer surface near the tip portion and capable of being screwed with the female screw portion.
    After the detaching member rotates and the male screw portion is screwed to the female screw portion of the guide block to function as the connecting member, the extruded portion protrudes through the through hole to form the radial fixing plate. By pressing and contacting the facing surface of the guide block, the distance between the facing surface of the guide block and the guide block is widened to function as the extrusion member.
    The release tool for a guide block according to claim 1.
  3. 　前記ガイドブロックの前記結合部は、前記ガイドブロックの貫通穴に形成された雌ネジ部であり、
    　前記結合部材は、筒部材であり、前記筒部材は、先端の外面に形成されて前記雌ネジ部とネジ結合する雄ネジ部を有し、
    　前記押出部材は、前記筒部材内の貫通孔を移動自在な線状の押し出し部材であり、前記筒部材の前記貫通孔を貫通して前記筒部材の先端から突出し、前記橈骨固定プレートの前記ガイドブロック対向面に押圧接触して、前記ガイドブロック対向面と前記ガイドブロックとの間隔を広げる、
    　請求項１に記載のガイドブロック用離脱具。     The joint portion of the guide block is a female screw portion formed in a through hole of the guide block.
    The connecting member is a tubular member, and the tubular member has a male threaded portion formed on the outer surface of the tip and screwed to the female threaded portion.
    The extruded member is a linear extruded member that can move through a through hole in the tubular member, penetrates the through hole of the tubular member, protrudes from the tip of the tubular member, and guides the radial fixing plate. Pressing and contacting the facing surface of the block increases the distance between the facing surface of the guide block and the guide block.
    The release tool for a guide block according to claim 1.
PCT/JP2021/000832 2020-01-15 2021-01-13 Guide block separation tool WO2021145338A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160220286A1 (en) * 2015-02-04 2016-08-04 Flower Orthopedics Corporation Bone Plate and Guide Block and Attachment Mechanism Thereof
US20190380755A1 (en) * 2018-06-18 2019-12-19 Revelation Plating, Llc Flexible guide for application of bone plates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160220286A1 (en) * 2015-02-04 2016-08-04 Flower Orthopedics Corporation Bone Plate and Guide Block and Attachment Mechanism Thereof
US20190380755A1 (en) * 2018-06-18 2019-12-19 Revelation Plating, Llc Flexible guide for application of bone plates

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