Bone treatment instruments

Abstract

To provide a bone treatment instrument capable of easily inserting a pin-like member into a bone of a patient in an accurate direction at an accurate position without depending on an operator's experience.SOLUTION: A guide member 11 guides an insertion direction of a pin-like member 10. The guide member 11 is attached to a body shaft member 12. A first index member 13 and a second index member 14 formed of resin are attached to the body shaft member 12 and index a position of the guide member 11. The first index member 13 is attached to the body shaft member 12 at a position different from the position of the guide member 11 in a longitudinal direction, and extends along a surface S1 including the guide member 11. The second index member 14 is attached to the body shaft member 12 at the same position as the position of the guide member 11 in the longitudinal direction, and extends along a surface S2 including the guide member 11, which is perpendicular to the surface S1. Metal index members 15 and 16 for indexing a position of the pin-like member 10 are arranged on tip sides of the first index member 13 and the second index member 14.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a bone treatment instrument used when performing a treatment to insert a pin-shaped member into a patient's bone. [Background technology]

[0002] In various surgeries performed on a patient's bones, such as bone fracture surgery or surgery in the bone joint region, such as bone drilling, a procedure is often performed in which a pin-shaped member, such as a pin, drill, or screw, is inserted into the patient's bone. In the procedure of inserting a pin-shaped member into a bone, an instrument is used that has a cylindrical portion or a portion with a hole through which the pin-shaped member is inserted and that guides the insertion direction of the pin-shaped member into the bone (see, for example, Patent Documents 1, 2, and 3). Using such an instrument, the surgeon inserts the pin-shaped member into the bone while checking the insertion position of the pin-shaped member into the bone under X-ray fluoroscopy. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2014 / 0276841 [Patent Document 2] US Patent Application Publication No. 2003 / 0212405 [Patent Document 3] US Patent Application Publication No. 2008 / 0021479 Summary of the Invention [Problem to be solved by the invention]

[0004] In a procedure for inserting a pin-shaped member into a patient's bone, inserting the pin-shaped member into the bone at the correct position and in the correct direction is an important factor in determining the outcome of the surgery, and is one of the most basic surgical techniques required of a surgeon. However, when inserting a pin-shaped member into a patient's bone, the surgeon must insert the pin-shaped member into the patient's bone at the correct position and in the correct direction, regardless of whether the patient is viewed from the front or the side. For this reason, inserting a pin-shaped member into the patient's bone at the correct position and in the correct direction is difficult, and surgeons often insert the pin-shaped member into the bone freehand, relying on their experience.

[0005] Patent Documents 1 to 3 disclose a method in which a bone treatment instrument is provided with a component such as an alignment bar, a guide rod, or a reference pin that is arranged to extend parallel to the pin-shaped member, and the surgeon performs a procedure to insert the pin-shaped member into the bone while referring to this component. However, with these bone treatment instruments, the surgeon can only refer to the component such as the alignment bar, the guide rod, or the reference pin when viewed from one direction, and ultimately, the surgeon is forced to perform the procedure of inserting the pin-shaped member into the bone almost freehand, relying on experience. Therefore, even while checking under X-ray fluoroscopy, the surgeon is forced to repeatedly insert the pin-shaped member into the bone through trial and error in order to insert the pin-shaped member into the bone at the correct position and direction.

[0006] If a bone treatment instrument could be realized that allows pin-shaped members to be easily inserted into a patient's bone at the correct position and direction without relying on the surgeon's experience, the number of times pin-shaped members are inserted into the bone could be reduced. This would improve surgical accuracy, shorten surgical time, and reduce exposure to X-rays, thereby improving the benefits for both patients and medical professionals. It would also promote the spread of safe and accurate surgical techniques that do not depend on the surgeon's experience, thereby improving the standard of medical care.

[0007] In view of the above circumstances, the present invention has an object to provide a bone treatment instrument that enables a pin-shaped member to be easily inserted into a patient's bone at an accurate position and in an accurate direction, regardless of the operator's experience. [Means for solving the problem]

[0008] (1) To achieve the above object, the bone treatment instrument of the present invention relates to a bone treatment instrument used when performing a treatment of inserting a pin-shaped member into a patient's bone. The bone treatment instrument of the present invention includes: a cylindrical guide member made of a metal material, through which the pin-shaped member to be inserted into the bone is inserted and which guides the insertion direction of the pin-shaped member into the bone; a main shaft member formed in an axial shape having a longitudinal direction and to which the guide member is attached so as to extend in a direction different from the longitudinal direction; and first and second index members made of any of a resin material, wood, and paper, which are attached to the main shaft member so as to extend from the main shaft member in a direction different from the longitudinal direction and which respectively indicate the position of the guide member. Furthermore, in the bone treatment instrument according to the present invention, the first indicator member is attached to the main shaft member at a position in the longitudinal direction different from the position at which the guide member is attached so as to extend along a first surface defined as a surface including the extending direction of the guide member, the first surface being defined as a surface including the extending direction of the first indicator member and the extending direction of the guide member, and the second indicator member is attached to the main shaft member at the same position in the longitudinal direction as the position at which the guide member is attached so as to extend along a second surface defined as a surface perpendicular to the first surface and including the extending direction of the guide member, in a direction different from the extending direction of the guide member, and each of the first indicator member and the second indicator member is provided with a metal indicator member at the tip end extending from the main shaft member, the metal indicator member being made of a metal material and used to indicate the position of the pin-shaped member to be inserted through the guide member and inserted into the bone.

[0009] According to this configuration, the first index member extends from the main body shaft member, to which the guide member is attached in a state in which it extends in a direction different from the longitudinal direction of the main body shaft member, at a position different from the guide member and in a direction different from the longitudinal direction of the main body shaft member, along a first plane that includes the direction in which the guide member extends to index the position of the guide member. That is, the first index member is arranged to extend along the first plane, which is the plane on which the guide member is arranged, and the first plane is defined as a plane that includes the direction in which the first index member extends and the direction in which the guide member extends. When a surgeon operating the bone treatment instrument configured as described above views the first index member along the first plane on which the first index member and guide member are arranged, the first index member and the guide member are arranged in an overlapping state in the direction along the first plane. Therefore, the surgeon can easily grasp the position and direction of the guide member pointed by the first index member in the front direction of the patient without relying on the surgeon's experience, simply by arranging the first surface, on which the first index member and the guide member are arranged, along the front direction of the patient, and by simply looking at the first index member along the first surface. Furthermore, the surgeon can easily grasp the position and direction of the pin-shaped member inserted into the guide member pointed by the first index member in the front direction of the patient without relying on the surgeon's experience, simply by looking at the first index member.

[0010] Furthermore, according to the above configuration, the guide member is attached to the main body shaft member so that it extends in a direction different from the longitudinal direction of the main body shaft member. The second index member extends from the main body shaft member at the same position in the longitudinal direction of the main body shaft member as the guide member, in a direction different from the longitudinal direction of the main body shaft member, and extends along a second plane that is perpendicular to the first plane and includes the direction in which the guide member extends, to indicate the position of the guide member. That is, the second index member is arranged to extend along the second plane that is perpendicular to the first plane on which the guide member and first index member are arranged and is the plane on which the guide member is arranged. When a surgeon operating the bone treatment instrument configured as described above views the second index member along the second plane on which the second index member and guide member are arranged, which is perpendicular to the first plane, the second index member and the guide member are arranged, the second index member and the guide member are arranged in an overlapping state in the direction along the second plane. Therefore, the surgeon can easily grasp the position and direction of the guide member pointed by the second index member in the lateral direction of the patient, without relying on the surgeon's experience, simply by arranging the first surface along the front direction of the patient and arranging the second surface on which the second index member and guide member are arranged along the lateral direction of the patient, and by simply looking at the second index member along the second surface.Furthermore, the surgeon can easily grasp the position and direction of the pin-shaped member inserted into the guide member pointed by the second index member in the lateral direction of the patient, without relying on the surgeon's experience, simply by looking at the second index member.

[0011] Therefore, with the above configuration, the surgeon positions the first surface along the front direction of the patient and the second surface along the side direction of the patient, and can view the first indicator member in the front direction of the patient and then view the second indicator member in the side direction of the patient. This alone allows the surgeon to easily grasp the exact position and direction of the pin-shaped member to be inserted through the guide member and inserted into the bone, regardless of whether the view is from the front direction or the side direction of the patient, without relying on the surgeon's experience. When the surgeon inserts the pin-shaped member into the affected bone of the patient during surgery, the surgeon first positions the tip of the tubular guide member at the position in the affected bone where the pin-shaped member will be inserted. At this time, the tip portion of the guide member is inserted into the patient's soft tissue and hidden from the outside, but the surgeon can view the first indicator member along the first surface from the front direction of the patient, and then view the second indicator member along the second surface from the side direction of the patient to confirm the position. This allows the surgeon to accurately and easily grasp the position and direction of the guide member indicated by the first and second index members, and the position and direction in which the pin-shaped member inserted into the guide member will be inserted into the affected bone.

[0012] Furthermore, according to the above configuration, the first index member is formed of any one of resin, wood, and paper, which are materials through which X-rays pass, and a metal index member formed of a metal material, which is a material that suppresses X-ray transmission, is disposed at the tip end of the first index member extending from the main shaft member. Therefore, even under X-ray fluoroscopy, the surgeon can easily confirm an image of the patient's bone and an image of the metal index member disposed at the tip end of the first index member by arranging the first surface, on which the first index member and the guide member are disposed, along the front direction of the patient and viewing an X-ray fluoroscopic image from the viewpoint of the front direction of the patient. This allows the surgeon to easily grasp, without relying on the surgeon's experience, the position and direction in which the pin-shaped member indicated by the metal index member disposed at the tip end of the first index member will be inserted into the guide member and further inserted into the bone, in the front direction of the patient.

[0013] Furthermore, according to the above configuration, the second index member is formed of any one of resin, wood, and paper, which are materials through which X-rays pass, and a metal index member formed of a metal material, which is a material that suppresses X-ray transmission, is disposed at the tip end of the second index member extending from the main shaft member. Therefore, even under X-ray fluoroscopy, the surgeon can easily confirm an image of the patient's bone and an image of the metal index member disposed at the tip end of the second index member by arranging the first surface along the front direction of the patient and the second surface, on which the second index member and guide member are disposed, along the lateral direction of the patient, and viewing an X-ray fluoroscopic image from the perspective of the patient's lateral direction. This allows the surgeon to easily grasp, without relying on the surgeon's experience, the position and direction in the lateral direction of the patient, at which the pin-shaped member indicated by the metal index member disposed at the tip end of the second index member will be inserted into the guide member and further inserted into the bone.

[0014] Therefore, with the above configuration, the surgeon positions the first surface along the front direction of the patient and the second surface along the lateral direction of the patient, and can view an image of the metal index member arranged on the tip side of the first index member in an X-ray fluoroscopic image taken in the front direction of the patient, and then can view an image of the metal index member arranged on the tip side of the second index member in an X-ray fluoroscopic image taken in the lateral direction of the patient. With this alone, the surgeon can easily grasp the exact position and direction of the pin-shaped member to be inserted into the guide member and inserted into the bone, regardless of whether the image is viewed from the front direction or the lateral direction of the patient, without relying on the surgeon's experience.

[0015] As described above, the surgeon grasps the exact position and direction of the pin-shaped member to be inserted through the guide member and inserted into the bone, when viewed from either the front or side of the patient, and then inserts the pin-shaped member into the bone. At this time, the pin-shaped member is first inserted into the guide member. Then, the pin-shaped member is inserted into the bone while being guided in its insertion direction by the guide member. At this time, the surgeon can accurately grasp the insertion position and insertion direction of the pin-shaped member into the bone, without relying on experience, by using the first index member and the metal index member disposed thereon and the second index member and the metal index member disposed thereon, when viewed from either the front or side of the patient. Then, the surgeon can easily insert the pin-shaped member into the bone accurately along the grasped insertion position and insertion direction. Therefore, with the bone treatment instrument configured as described above, the surgeon can easily insert the pin-shaped member into the patient's bone at the exact position and direction, regardless of experience.

[0016] Therefore, with the above-described configuration, it is possible to provide a bone treatment instrument that allows the pin-shaped member to be easily inserted into the patient's bone at the correct position and direction, regardless of the operator's experience.

[0017] (2) A plurality of the metal indicator members may be arranged on the tip side of the first indicator member, and the plurality of metal indicator members arranged on the first indicator member may be arranged in a dispersed manner along the direction in which the first indicator member extends.

[0018] With this configuration, when the surgeon positions the first surface in the direction of the patient's front and views an X-ray fluoroscopic image from the perspective of the patient's front, he or she can confirm an image of the patient's bone and images of the metal index members arranged in a dispersed manner at the tip end of the first index member. This allows the surgeon to grasp, in the direction of the patient's front, the position and direction in which the pin-shaped members will be inserted into the guide member and further inserted into the bone, as images of the metal index members arranged in a dispersed manner as shown by dashed lines. This allows the surgeon to more clearly and easily grasp the position and direction in which the pin-shaped members will be inserted into the bone. This also allows the surgeon to perform the procedure with greater peace of mind.

[0019] (3) A plurality of the metal indicator members may be arranged on the tip side of the second indicator member, and the plurality of metal indicator members arranged on the second indicator member may be arranged in a dispersed manner along the direction in which the second indicator member extends.

[0020] With this configuration, when the surgeon positions the first surface along the front direction of the patient and the second surface along the lateral direction of the patient, and views an X-ray fluoroscopic image from the perspective of the patient's side, he or she can confirm an image of the patient's bone and images of the metal index members arranged in a dispersed manner at the tip end of the second index member. This allows the surgeon to grasp, in the lateral direction of the patient, the position and direction in which the pin-shaped member will be inserted into the guide member and further inserted into the bone, as images of the metal index members arranged in a dispersed manner like broken lines. This allows the surgeon to more clearly and easily grasp the position and direction in which the pin-shaped member will be inserted into the bone. This also allows the surgeon to perform the procedure with greater peace of mind.

[0021] (4) The main body shaft member may be inserted and attached in a state in which the guide member extends in a direction different from the longitudinal direction.

[0022] According to this configuration, the guide member can be easily attached to the main body shaft member in a state in which it extends in a direction different from the longitudinal direction of the main body shaft member, using a simple structure in which the guide member is inserted into the main body shaft member.

[0023] (5) The second indicator member may be attached to the main shaft member in a cantilevered manner extending from the main shaft member.

[0024] With this configuration, the second indicator member is attached to the main shaft member in a cantilevered state, and the second indicator member is attached to the main shaft member with its end connected to the main shaft member. Therefore, with the simple structure of connecting the end of the second indicator member to the main shaft member, the second indicator member can be easily attached to the main shaft member in a state where it extends from the main shaft member in a direction different from the longitudinal direction of the main shaft member.

[0025] (6) The first indicator member may be attached to the main body shaft member so as to extend from the main body shaft member in a direction parallel to a direction in which the guide member extends from the main body shaft member.

[0026] According to this configuration, the first index member and the guide member are provided to extend parallel to each other from the main body shaft portion. Therefore, when the surgeon inserts the guide member into the patient's soft tissue from the patient's lateral side toward the patient's affected bone and positions the first surface on which the first index member and the guide member are disposed along the patient's frontal direction, the surgeon can position the first index member along a direction parallel to the patient's lateral side. That is, the first index member can be positioned on the patient's front side so as to extend along a direction perpendicular to the patient's frontal direction. Therefore, when the surgeon determines the position and direction of the guide member pointed by the first index member in the patient's frontal direction, the surgeon can easily manipulate the first index member on the patient's front side along a direction substantially parallel to the patient's body. This further improves operability when determining the position and direction of the guide member in the patient's frontal direction while viewing the first index member along the first surface.

[0027] (7) The main body shaft member may be provided so that the second index members can be attached at a plurality of locations in the circumferential direction of the main body shaft member.

[0028] With this configuration, the second index member can be attached to the main body shaft member at any of a plurality of locations around the circumference of the main body shaft member. Therefore, the angle of intersection between the guide member extending from the main body shaft member and the second index member can be appropriately changed to facilitate confirmation using the second index member, depending on the relationship between the patient's bone and the position and direction in which the pin-shaped member will be inserted into the patient's bone. This makes it even easier to determine the position and direction in which the pin-shaped member will be inserted into the patient's bone.

[0029] (8) The main shaft member may have a flange portion that extends in a direction perpendicular to the longitudinal direction, and the flange portion may have an insertion hole through which the guide member is inserted and a plurality of mounting holes into which the end portions of the second indicator member are fitted to mount the second indicator member.

[0030] According to this configuration, the flange portion of the main body shaft member is provided with a guide member insertion hole and multiple mounting holes for mounting the second index member. This increases the degree of freedom in setting the mountable position of the second index member relative to the main body shaft member, and increases the degree of freedom in setting the intersecting angle between the guide member extending from the main body shaft member and the second index member. This allows for more flexible setting of the intersecting angle between the guide member and the second index member depending on the physique of each patient, making it easier to determine the position and direction in which the pin-shaped member will be inserted into the patient's bone. [Effects of the Invention]

[0031] According to the present invention, it is possible to provide a bone treatment instrument that enables a pin-shaped member to be easily inserted into a patient's bone at an accurate position and in an accurate direction, regardless of the operator's experience. [Brief explanation of the drawings]

[0032] [Figure 1] 1 is a perspective view showing a bone treatment instrument according to an embodiment of the present invention. [Figure 2]FIG. 2 is an exploded perspective view of the bone treatment instrument. [Figure 3] FIG. 2 is a plan view of the bone treatment instrument. [Figure 4] FIG. 2 is a front view of the bone treatment instrument. [Figure 5] 10 is a diagram schematically showing a state in which a pin-shaped member is inserted into a bone when the bone treatment instrument is used; FIG. [Figure 6] FIG. 2 is a view showing a part of a bone treatment instrument, including a cross section taken along a plane including a guide member and a second index member of the bone treatment instrument. [Figure 7] Figures 7(A) and 7(B) are perspective views of a bone treatment instrument, where Figure 7(A) is a diagram for explaining a first surface defined in the bone treatment instrument, and Figure 7(B) is a diagram for explaining a second surface defined in the bone treatment instrument. [Figure 8] 10A and 10B are diagrams schematically showing a state in which the bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone. [Figure 9] 10A and 10B are diagrams schematically showing a state in which the bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone. [Figure 10] 10A and 10B are diagrams schematically showing a state in which the bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone. [Figure 11] 10A and 10B are diagrams schematically showing a state in which the bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone. [Figure 12] FIG. 10 is a diagram schematically illustrating a state in which a bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone, and shows a fluoroscopic image seen on the monitor of a fluoroscopic device. [Figure 13] FIG. 10 is a diagram schematically illustrating a state in which a bone treatment instrument is used in a treatment for inserting a pin-shaped member into a bone, and shows a fluoroscopic image seen on the monitor of a fluoroscopic device. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0034] [Outline of bone treatment instruments] FIG. 1 is a perspective view showing a bone treatment instrument 1 according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of the bone treatment instrument 1. FIG. 3 is a plan view of the bone treatment instrument 1. FIG. 4 is a front view of the bone treatment instrument 1. The bone treatment instrument 1 shown in FIGS. 1 to 4 can be widely used in various surgeries performed on a patient's bones, such as fracture surgery or surgery in the bone joint region, such as bone drilling. The bone treatment instrument 1 is used when inserting a pin-shaped member into a patient's bone in various surgeries performed on a patient's bones.

[0035] Furthermore, the bone treatment instrument 1 is suitably used, for example, when inserting a pin-shaped member into a patient's femur in surgery for a proximal femoral fracture or in regenerative medical surgery for osteonecrosis of the femoral head. Fig. 5 is a diagram schematically showing a state in which the bone treatment instrument 1 is used to insert the pin-shaped member 10 into a bone 100 constituting the femur (hereinafter, the bone 100 will also be referred to as the femur 100). Note that Fig. 5 only shows the proximal portion of the femur 100 and the bone treatment instrument 1, and other elements are omitted. That is, Fig. 5 does not show the patient's soft tissue, portions of the femur 100 other than the proximal portion, or the surgeon operating the bone treatment instrument 1.

[0036] For example, when the bone treatment instrument 1 is used in regenerative medicine surgery for osteonecrosis of the femoral head, the bone treatment instrument 1 is used to insert the pin-shaped member 10 into the patient's femur 100 and insert it into the femur 100. By using the bone treatment instrument 1, the pin-shaped member 10 is inserted into the patient's femur 100 at a precise position and direction, as will be described later. In regenerative medicine surgery for osteonecrosis of the femoral head, once the pin-shaped member 10 is inserted into the femur 100, a procedure is then performed in which, for example, a portion of the femur 100 is harvested as autogenous bone, and a bone composition containing the autogenous bone is then provided to the crushed portion of the femoral head. In regenerative medicine surgery for osteonecrosis of the femoral head, the pin-shaped member 10 inserted into the femur 100 is used as a guide pin to guide the operation of surgical instruments (not shown) used to perform the procedures of harvesting autogenous bone and providing the bone composition to the crushed portion. After the procedure of harvesting the autologous bone and the procedure of providing the bone composition to the crushed portion are completed, the pin-shaped member 10 is removed from the femur 100 .

[0037] The pin-shaped member 10 inserted into the femur 100 using the bone treatment instrument 1 in a regenerative medical surgery for osteonecrosis of the femoral head is inserted from the lateral side of the femur 100 toward the medial side, and is temporarily fixed in the femur 100. The pin-shaped member 10 is formed, for example, from a metal material. The pin-shaped member 10 illustrated in this embodiment is formed into a round shaft with a conically pointed tip, and is configured as a needle-like pin. The thickness of the pin-shaped member 10 is set to, for example, 0.5 mm or more to prevent the pin-shaped member 10 from bending and becoming unable to be inserted into the femur 100 when attempting to insert it into the femur 100. Furthermore, if the pin-shaped member 10 is too thick, it takes time for the hole created by the pin-shaped member 10 to naturally repair itself, so the thickness of the pin-shaped member 10 is set to, for example, 4 mm or less. In this embodiment, the pin-shaped member 10 inserted into the femur 100 by using the bone treatment instrument 1 is in the form of a needle-like pin, but this is not the only option, and the bone treatment instrument 1 may be used for pin-shaped members of various shapes. For example, the bone treatment instrument 1 may be used when a pin-shaped member in the form of a drill, a screw, or the like is inserted into a bone.

[0038] [Details of bone treatment instruments] The following provides a more detailed explanation of the bone treatment instrument 1. As shown in Figures 1 to 5, the bone treatment instrument 1 is configured to include a guide member 11, a main body shaft member 12, a first index member 13, a second index member 14, a plurality of first metal index members (metal index members) 15, and a plurality of second metal index members (metal index members) 16.

[0039] The guide member 11, the first index member 13, and the second index member 14 are configured to be detachably attached to the main body shaft member 12. A plurality of first metal index members 15 are disposed on the first index member 13, and in this embodiment, are disposed inside the first index member 13. A plurality of second metal index members 16 are disposed on the second index member, and in this embodiment, are disposed inside the second index member 14.

[0040] The main body shaft member 12, the first index member 13, and the second index member 14 are made of any of resin, wood, and paper, which are materials through which X-rays pass. In this embodiment, the main body shaft member 12, the first index member 13, and the second index member 14 are made of, for example, a resin material, more specifically, a synthetic resin. When the main body shaft member 12, the first index member 13, and the second index member 14 are made of paper, the paper material may be, for example, reinforced cardboard or hard paper. The guide member 11, the plurality of first metal index members 15, and the plurality of second metal index members 16 are made of a metal material, such as stainless steel, which is a material that suppresses the transmission of X-rays.

[0041] [Guide parts] Fig. 6 is a diagram showing a portion of the bone treatment instrument 1, and is a diagram including a cross section of a plane including the guide member 11 and the second index member 14 of the bone treatment instrument 1. The guide member 11 shown in Figs. 1 to 6 is provided as a tubular member through which the pin-shaped member 10 to be inserted into the femur 100 of a patient is inserted, and which guides the insertion direction of the pin-shaped member 10 into the femur 100. As described above, the guide member 11 is formed of, for example, stainless steel, a metal material that suppresses the transmission of X-rays. Furthermore, the guide member 11 is provided as a tubular member that extends linearly, and in this embodiment, is formed as an elongated hollow cylindrical member.

[0042] 1, 2, and 6, guide member 11 is configured to be inserted into an insertion hole 24 provided in main body shaft member 12 while extending in a direction different from the longitudinal direction of main body shaft member 12 (described later), and to be attached to main body shaft member 12 while extending cantilevered from main body shaft member 12. Guide member 11 is provided with an expanded-diameter portion 11a, which is a cylindrical portion with an expanded diameter, at one linear end. A male thread is formed on the outer periphery of expanded-diameter portion 11a, and when guide member 11 is inserted into insertion hole 24 of main body shaft member 12 and attached to main body shaft member 12, the male thread of expanded-diameter portion 11a is configured to thread into a female thread formed partially on the inner periphery of insertion hole 24. In other words, guide member 11 is configured to be attached to main body shaft member 12 when inserted into insertion hole 24 of main body shaft member 12, by threading the male thread of expanded-diameter portion 11a into the female thread of insertion hole 24 of main body shaft member 12.

[0043] Furthermore, a knob 11b is provided at the end of guide member 11 where enlarged diameter portion 11a is provided. Knob 11b is provided as an operating portion that is gripped and rotated by the surgeon when screwing and attaching guide member 11 to main body shaft member 12. Knob 11b is provided as a stepped portion that is flange-shaped and has a larger diameter than enlarged diameter portion 11a at the end of guide member 11, and is configured to abut against the edge of insertion hole 24 of main body shaft member 12 when guide member 11 is screwed and attached to a female thread portion partially provided in insertion hole 24 of main body shaft member 12, thereby positioning guide member 11 with respect to main body shaft member 12.

[0044] 5 and 6, guide member 11, which is formed in a hollow cylindrical shape and extends linearly with a circular cross section, is provided with a pin insertion hole 11c that penetrates in the longitudinal direction thereof. Pin insertion hole 11c is provided as a hole through which pin-shaped member 10 is inserted, and is configured to penetrate guide member 11 along the longitudinal direction of guide member 11 with a circular cross section. Therefore, pin insertion hole 11c is open at the base end side of guide member 11, which is one end side attached to main body shaft member 12. Pin insertion hole 11c is also open at the tip side of guide member 11, which is the opposite side to the base end side.

[0045] Furthermore, the cross-sectional shape of the pin insertion hole 11c corresponds to the cross-sectional shape of the pin-shaped member 10. That is, the shape of the inner peripheral surface of the guide member 11 corresponds to the shape of the outer peripheral surface of the pin-shaped member 10. More specifically, the inner diameter of the inner peripheral surface of the guide member 11 is set to be approximately 0.1 mm to 0.5 mm larger than the outer diameter of the pin-shaped member 10, with a clearance provided. With this shape, the guide member 11 is configured so that the pin-shaped member 10 can be smoothly inserted therethrough and rattle between the pin-shaped member 10 is suppressed.

[0046] 1, 2, and 6, guide member 11 is provided with a plurality of protrusions formed as portions that are pointed toward the distal end at distal end portion 11d, which is the distal end portion extending cantilevered from main body shaft member 12 when attached to main body shaft member 12. The plurality of protrusions are provided in a line along the circumferential direction of the opening of pin insertion hole 11c at distal end portion 11d of guide member 11. Each protrusion at distal end portion 11d is formed, for example, in a V-shape that gradually becomes thinner toward the distal end, and has a cutting edge portion at its tip. When distal end portion 11d of guide member 11 is positioned in contact with femur 100, the cutting edges of the plurality of protrusions engage with femur 100 so as to bite into it.

[0047] [Main shaft member] 1 to 6 is formed in a shaft shape having a linearly extending longitudinal direction X1, and is configured so that guide member 11 is inserted and attached to main body shaft member 12 in a state where it intersects with the longitudinal direction X1. Main body shaft member 12 is also configured so that first index member 13 and second index member 14 (described later) are also attached to main body shaft member 12 in a state where they extend in a direction different from the longitudinal direction X1 of main body shaft member 12. The longitudinal direction X1 of main body shaft member 12 is indicated by double-headed arrows X1 in FIGS. 1, 2, and 4. Main body shaft member 12 is formed, as described above, from, for example, a synthetic resin, a resin material that is transparent to X-rays.

[0048] 1 to 6, main body shaft member 12 is provided with first and second shaft portions 21 and 22 extending side by side in series along longitudinal direction X1, and a flange portion 23 disposed between first and second shaft portions 21 and 22. First shaft portion 21, second shaft portion 22, and flange portion 23 are integrally formed, and are provided side by side in series along longitudinal direction X1 of main body shaft member 12 in the order of first shaft portion 21, flange portion 23, and second shaft portion 22.

[0049] The first shaft portion 21 is provided as a portion extending in an elongated cylindrical shape along the longitudinal direction X1. Referring to FIGS. 1 to 5, the first shaft portion 21 is provided with an attachment hole 21a at an end opposite to an end portion integrally formed with the flange portion 23 and the second shaft portion 22, to which a first index member 13 (described later) is attached. The attachment hole 21a is provided as a hole with a circular cross section opening toward the side of the first shaft portion 21 on the outer peripheral surface of the end portion of the first shaft portion 21 opposite to the end portion integrally formed with the flange portion 23 and the second shaft portion 22. The attachment hole 21a is provided as a hole extending in a direction perpendicular to the longitudinal direction X1 of the main shaft member 12. The first index member 13 is attached to the first shaft portion 21 by fitting an end portion of the first index member 13 into the attachment hole 21a.

[0050] Second shank 22 is provided as an elongated cylindrical portion extending along longitudinal direction X1, and is provided in series with first shank 21 along longitudinal direction X1. Second shank 22 is provided as a handle portion to be grasped by a surgeon who is an operator who operates bone treatment instrument 1. The diameter of the circular cross section of second shank 22 is set to be larger than the diameter of the circular cross section of first shank 21, and second shank 22 is formed to be thicker than first shank 21, and is set to a dimension that makes it easy for a surgeon to grasp.

[0051] 1 to 6, flange portion 23 is provided between first shaft portion 21 and second shaft portion 22, and is provided as a portion that extends so as to protrude along a direction perpendicular to longitudinal direction X1 of main body shaft member 12. Flange portion 23 is provided as a generally disc-shaped portion, and the generally disc-shaped outer periphery is provided with arc-shaped outer periphery portion 23a extending over an angular range of 180° or more and flat outer periphery portion 23b extending in a short straight line. Flange portion 23 is provided with insertion hole 24 through which guide member 11 is inserted, and multiple mounting holes 25a, 25b and multiple mounting holes 26a, 26b for mounting second index member 14, which will be described later.

[0052] The insertion hole 24 of the flange portion 23 is provided as a hole through which the guide member 11 is inserted while extending in a direction different from the longitudinal direction X1 of the main body shaft member 12. The insertion hole 24 has a circular cross section and is configured to penetrate the flange portion 23 in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12. Therefore, the insertion hole 24 is open on both sides of the outer circumferential surface of the flange portion 23 in the direction perpendicular to the longitudinal direction X1. Also, referring to FIG. 6 , the insertion hole 24 is provided with an expanded diameter hole portion 24a, the diameter of which is expanded in a stepped manner, at one end side extending through the flange portion 23. An internal thread portion is formed on the inner periphery of the expanded diameter hole portion 24a, and the internal thread portion of the expanded diameter hole portion 24a is configured to threadably mate with the external thread portion on the outer periphery of the expanded diameter portion 11a of the guide member 11. The guide member 11 is attached to the main shaft member 12 by inserting it into the insertion hole 24 of the flange portion 23 and threading the male thread portion of the enlarged diameter portion 11a of the guide member 11 into the female thread portion on the inner circumference of the enlarged diameter hole portion 24a of the insertion hole 24.

[0053] The multiple mounting holes 25a, 25b in the flange portion 23 are provided as holes into which the end portions of the second index member 14 described below are fitted to attach the second index member 14. The multiple mounting holes 25a, 25b are configured as holes into which the second index member 14 is attached when treatment is performed using the bone treatment instrument 1 on the femur 100 on one side in the lateral direction of the patient (left-right direction of the patient). For example, the multiple mounting holes 25a, 25b are configured as holes into which the second index member 14 is attached when treatment is performed using the bone treatment instrument 1 on the left femur 100, which is one side in the lateral direction of the patient.

[0054] Each of the multiple mounting holes 25a, 25b is provided as a hole with a circular cross section that opens in the arc-shaped outer peripheral portion 23a of the flange portion 23. The multiple mounting holes 25a, 25b are arranged to open in a row along the outer peripheral portion 23a of the flange portion 23 that extends in the circumferential direction of the main body shaft member 12. Each of the mounting holes 25a, 25b is provided as a hole that extends in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12. When the second index member 14 is attached to the multiple mounting holes 25a, 25b, the second index member 14 is attached to one of the multiple mounting holes 25a and 25b selected by the surgeon. The surgeon selects one of the multiple mounting holes 25a or 25b in accordance with the relationship between the patient's femur 100 and the position and direction in which the pin-shaped member 10 is inserted into the patient's femur 100, from the perspective of making it easier to confirm using the second index member 14, and attaches the second index member 14 to the selected mounting hole 25a or 25b. The second index member 14 is attached to the main body shaft member 12 at the flange portion 23 by fitting and fitting the end of the second index member 14 into the mounting hole 25a or 25b.

[0055] As described above, main body shaft member 12 is provided with a plurality of mounting holes 25a, 25b that open in a row along outer peripheral portion 23a of flange portion 23, and is configured so that second index member 14 can be attached to any of the plurality of mounting holes 25a, 25b. Therefore, main body shaft member 12 is configured so that second index member 14 can be attached at a plurality of locations in the circumferential direction of main body shaft member 12.

[0056] Similar to the multiple mounting holes 25a, 25b, the multiple mounting holes 26a, 26b in the flange portion 23 are provided as holes into which the end portions of the second index member 14 are fitted to attach the second index member 14. The multiple mounting holes 25a, 25b are configured as holes into which the second index member 14 is attached when treatment is performed using the bone treatment instrument 1 on the femur 100 on the other side in the lateral direction of the patient (left-right direction of the patient). For example, the multiple mounting holes 26a, 26b are configured as holes into which the second index member 14 is attached when treatment is performed using the bone treatment instrument 1 on the right femur 100, which is the other side in the lateral direction of the patient.

[0057] The multiple mounting holes 26a, 26b are arranged in flange portion 23 at positions that are symmetrical with respect to the multiple mounting holes 25a, 25b, centered on the position of insertion hole 24, when the flange portion 23 is viewed along the longitudinal direction X1 of the main body shaft member 12. Each of the multiple mounting holes 26a, 26b is provided as a hole that opens with a circular cross section in the arc-shaped outer peripheral portion 23a of the flange portion 23. The multiple mounting holes 26a, 26b are arranged so that they open in a row along the outer peripheral portion 23a of the flange portion 23 that extends along the circumferential direction of the main body shaft member 12. Each of the mounting holes 26a, 26b is provided as a hole that extends in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12. When attaching the second index member 14 to the multiple mounting holes 26a, 26b, the second index member 14 is attached to one of the multiple mounting holes 26a or 26b selected by the surgeon. The surgeon selects one of the multiple mounting holes 26a or 26b in accordance with the relationship between the patient's femur 100 and the position and direction in which the pin-shaped member 10 is inserted into the patient's femur 100, from the perspective of making it easier to confirm using the second index member 14, and attaches the second index member 14 to the selected mounting hole 26a or 26b. The second index member 14 is attached to the main body shaft member 12 at the flange portion 23 by fitting and fitting the end of the second index member 14 into the mounting hole 26a or 26b.

[0058] As described above, main body shaft member 12 is provided with a plurality of mounting holes 26a, 26b that open in a row along outer peripheral portion 23a of flange portion 23, and is configured so that second index member 14 can be attached to any of the plurality of mounting holes 26a, 26b. Therefore, main body shaft member 12 is configured so that second index member 14 can be attached at a plurality of locations in the circumferential direction of main body shaft member 12.

[0059] [First index member] 7(A) and 7(B) are perspective views of the bone treatment instrument 1, where FIG. 7(A) is a diagram illustrating a first plane S1 defined in the bone treatment instrument 1, and FIG. 7(B) is a diagram illustrating a second plane S2 defined in the bone treatment instrument 1. The first index member 13 shown in FIGS. 1 to 7 is attached to the main body shaft member 12 so as to extend cantilevered from the main body shaft member 12 in a direction different from the longitudinal direction X1 of the main body shaft member 12, and is provided as a member for indicating the position of the guide member 11. The first index member 13 is also provided as a member for indicating the position of the guide member 11 when an operator operating the bone treatment instrument 1 views the bone treatment instrument 1 from the front direction of the patient, as described above. The first index member 13 is formed, for example, from a synthetic resin, i.e., a resin material that is transparent to X-rays.

[0060] First index member 13 is a rod-shaped member that extends linearly with a circular cross section. One end of first index member 13 is fitted into mounting hole 21a provided in first shaft portion 21 of main body shaft member 12, thereby being attached to main body shaft member 12. First index member 13 is attached to main body shaft member 12 by fitting its end into mounting hole 21a of main body shaft member 12, such that first index member 13 extends cantilevered from main body shaft member 12 in a direction different from longitudinal direction X1 of main body shaft member 12. In main body shaft member 12, mounting hole 21a to which first index member 13 is attached and insertion hole 24 through which guide member 11 is inserted are arranged to extend parallel to each other in a direction perpendicular to longitudinal direction X1 of main body shaft member 12. Therefore, the first indicator member 13 is configured so that its end is fitted into the mounting hole 21a of the main body shaft member 12 and attached to the main body shaft member 12 in a state in which it extends cantilevered from the main body shaft member 12 along a direction parallel to the direction in which the guide member 11 extends from the main body shaft member 12.

[0061] As described above, first index member 13 is attached to main body shaft member 12 so as to extend from main body shaft member 12 in a direction parallel to the extension direction of guide member 11 from main body shaft member 12. Furthermore, first index member 13 is attached to main body shaft member 12 at the position of attachment hole 21a at the end of first shaft portion 21, which is a different position in the longitudinal direction X1 of main body shaft member 12 from the position of insertion hole 24 of flange portion 23, where guide member 11 is attached to main body shaft member 12. Therefore, first index member 13 is attached to main body shaft member 12 at a different position in the longitudinal direction X1 of main body shaft member 12 from the position where guide member 11 is attached to main body shaft member 12, so as to extend along first plane S1, which is defined as a plane including the extension direction of guide member 11. Furthermore, first plane S1 is defined as a plane including the extension direction of first index member 13 and the extension direction of guide member 11. In this embodiment, first plane S1, which is defined as a plane including the extending direction of first index member 13 and the extending direction of guide member 11, also includes longitudinal direction X1 of main body shaft member 12. First index member 13 is provided so as to extend on first plane S1 on the same side of main body shaft member 12 as the side on which guide member 11 extends from main body shaft member 12. First plane S1, which is defined as a plane including the extending direction of first index member 13 and the extending direction of guide member 11, is schematically shown by a two-dot chain line S1 in Figures 3 and 4, and is schematically shown as a surface region S1 indicated by two-dot chain hatching in Figure 7(A).

[0062] 3, first index member 13 has a hollow cylindrical portion at its tip end, extending cantilevered from main body shaft member 12 when attached to main body shaft member 12. Therefore, first index member 13 has metal index member accommodating region 13a, which is a hollow region extending as a cylindrical space along the longitudinal direction of first index member 13, at its tip end extending from main body shaft member 12. Metal index member accommodating region 13a configures a region for accommodating a plurality of first metal index members 15, which will be described later. Furthermore, a plurality of first metal index members 15 are dispersedly disposed in metal index member accommodating region 13a, which is provided at the tip end of first index member 13. Furthermore, a cover member 13b is fitted and fixed to cover the end of metal index member accommodating region 13a at the tip end of first index member 13.

[0063] 1 to 3 and 5, a mark 13c is engraved on the end of first index member 13 that is attached to the main body shaft member 12. Mark 13c is engraved on first index member 13, for example, as a circular mark. Then, with reference to FIGS. 1, 2 and 4, a mark 21b is engraved on first shaft portion 21 of main body shaft member 12 near mounting hole 21a. Mark 21b is depicted as a mark with a shape corresponding to mark 13c provided on first index member 13, and is engraved on first shaft portion 21 as a circular mark. When attaching first index member 13 to the main body shaft member 12, the surgeon operating the bone treatment instrument 1 can refer to and correspond mark 13c of first index member 13, which has the same circular shape, with mark 21b near mounting hole 21a of first shaft portion 21. This allows the surgeon to align the mark 13c with the mark 21b, and easily fit and attach the first index member 13 into the attachment hole 21a of the first shaft portion 21 without any hesitation.

[0064] [Second index member] 1 to 7 is attached to the main body shaft member 12 in a state in which it extends in a cantilevered manner from the main body shaft member 12 in a direction different from the longitudinal direction X1 of the main body shaft member 12, and is provided as a member that indicates the position of the guide member 11. Furthermore, the second index member 14 is provided as a member that indicates the position of the guide member 11 when the surgeon operating the bone treatment instrument 1 views the bone treatment instrument 1 from the side of the patient. As described above, the second index member 14 is formed, for example, from a synthetic resin, a resin material that allows X-rays to pass through.

[0065] Second index member 14 is provided as a rod-shaped member that extends linearly with a circular cross section. Second index member 14 is configured to be attached to main body shaft member 12 by fitting one end of the rod-shaped member into one of multiple mounting holes 25a, 25b or multiple mounting holes 26a, 26b provided in flange portion 23 of main body shaft member 12. Second index member 14 is attached to main body shaft member 12 by fitting its end into mounting holes 25a, 25b or mounting holes 26a, 26b of main body shaft member 12, so that second index member 14 extends in a cantilevered manner from main body shaft member 12 in a direction different from longitudinal direction X1 of main body shaft member 12.

[0066] 2, 3, and 6, the second index member 14 is provided with an attachment protrusion 14c at its end that is attached to the main body shaft member 12. The attachment protrusion 14c is provided as a cylindrical protrusion with a reduced diameter at one longitudinal end of the second index member 14. The attachment protrusion 14c is configured to fit into the attachment holes 25a, 25b or 26a, 26b of the main body shaft member 12. The second index member 14 is attached to the main body shaft member 12 by fitting the attachment protrusion 14c at its end into the attachment holes 25a, 25b or 26a, 26b of the flange portion 23 of the main body shaft member 12. In other words, the second index member 14 is attached to the main body shaft member 12 by fitting and connecting its end to the main body shaft member 12, so that it extends cantilevered from the main body shaft member 12.

[0067] The positions of the mounting holes 25a, 25b, 26a, and 26b in the longitudinal direction X1 of the main body shaft member 12 are all the same as the position of the insertion hole 24 in the longitudinal direction X1 of the main body shaft member 12. The mounting holes 25a, 25b, 26a, and 26a are all provided in the flange portion 23 of the main body shaft member 12 to extend in a direction intersecting the extension direction of the insertion hole 24. Furthermore, the mounting holes 25a, 25b, 26a, and 26a in the main body shaft member 12 are all provided to extend in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12, just like the insertion hole 24 which extends in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12. Therefore, the second indicator member 14 is attached by having its end fitted into the mounting hole 25a, 25b, 26a, or 26b, so that it is attached to the main body shaft member 12 at the same position in the longitudinal direction X1 of the main body shaft member 12 as the guide member 11 is attached, along a direction different from the direction in which the guide member 11 extends, and in a direction perpendicular to the longitudinal direction X1 of the main body shaft member 12, just like the guide member 11.

[0068] As described above, second index member 14 is attached to main body shaft member 12 at the same position in longitudinal direction X1 of main body shaft member 12 as guide member 11 is attached, but so as to extend in a direction different from the extension direction of guide member 11. Furthermore, second index member 14 is attached to main body shaft member 12 so as to extend perpendicular to longitudinal direction X1 of main body shaft member 12, similar to guide member 11, which extends perpendicular to longitudinal direction X1 of main body shaft member 12 along first plane S1, which is a plane including the extension directions of first index member 13 and guide member 11. Therefore, first index member 13 is attached to main body shaft member 12 at the same position in longitudinal direction X1 of main body shaft member 12 as guide member 11 is attached, but so as to extend in a direction different from the extension direction of guide member 11, along second plane S2, which is defined as a plane perpendicular to first plane S1 and including the extension direction of guide member 11. In addition, the second surface S2, which is defined as a surface perpendicular to the first surface S1 and including the direction in which the guide member 11 extends, is schematically shown by a two-dot chain line S2 in Figure 4, and is schematically shown as a surface area S2 indicated by two-dot chain line hatching in Figure 7(B).

[0069] 3, second index member 14, when attached to main body shaft member 12, has a hollow cylindrical portion at its tip end extending cantilevered from main body shaft member 12. Therefore, second index member 14 has metal index member accommodating region 14a, which is a hollow region extending as a cylindrical space along the longitudinal direction of second index member 14, at its tip end extending from main body shaft member 12. Metal index member accommodating region 14a configures a region for accommodating a plurality of second metal index members 16, which will be described later. Furthermore, a plurality of second metal index members 16 are dispersedly disposed in metal index member accommodating region 14a, which is provided at the tip end of second index member 14. A cover member 14b is fitted and fixed to cover the end of metal index member accommodating region 14a at the tip end of second index member 14.

[0070] 1 to 3 and 5, a mark 14d is engraved on the second index member 14 at the end side that is attached to the main body shaft member 12. The mark 14d is engraved on the second index member 14, for example, as a mark depicting a square shape. Then, with reference to FIGS. 1 and 2, a mark 23c is engraved on the outer circumferential portion 23a of the flange portion 23, in which the attachment holes 25a, 25b, 26a, and 26b are provided in the main body shaft member 12. The mark 23c is depicted as a mark having a shape that corresponds to the mark 14d provided on the second index member 14, and is engraved on the second index member 14 as a mark depicting a square shape. When attaching the second index member 14 to the main body shaft member 12, the surgeon operating the bone treatment instrument 1 can refer to the mark 14d on the second index member 14, which also has a square shape, and the mark 23c on the flange portion 23 to match them. This allows the surgeon to match the mark 14d with the mark 23c, and easily fit and attach the second index member 14 into the attachment hole 25a, 25b, 26a or 26b provided in the flange portion 23 without any hesitation.

[0071] [Metal index parts] 1 and 3 are disposed on the first index member 13 and the second index member 14, respectively, and are provided as the metal index members of this embodiment for indicating the position of the pin-shaped member 10 to be inserted through the guide member 11 and inserted into the femur 100. As described above, the first metal index member 15 and the second metal index member 16 are formed of, for example, stainless steel, a metal material that suppresses the transmission of X-rays.

[0072] The first metal index member 15 is provided as a metal index member disposed on the first index member 13, and is disposed on the tip side of the first index member 13 extending in a cantilevered manner from the main body shaft member 12. The first metal index member 15 is provided as a metal index member for indicating the position of the pin-shaped member 10 that is inserted through the guide member 11 and inserted into the femur 100 under X-ray fluoroscopy. The first metal index member 15 is also provided as a metal index member for indicating the position of the guide member 11 when the surgeon operating the bone treatment instrument 1 views an X-ray fluoroscopic image viewed from the front direction of the patient.

[0073] In this embodiment, the first metal index member 15 is provided as a cylindrical metal member, and a plurality of first metal index members 15 are provided in the bone treatment instrument 1, and are arranged on the tip side of the first index member 13 extending in a cantilevered manner from the main body shaft member 12. The plurality of first metal index members 15 arranged on the first index member 13 are arranged in a dispersed manner along the extension direction of the first index member 13. Furthermore, in this embodiment, the plurality of first metal index members 15 are arranged in a dispersed manner at equal intervals on the tip side of the first index member 13.

[0074] 3, the plurality of first metal indicator members 15 are arranged in a dispersed manner along the extension direction of the first indicator member 13 in a cylindrical metal indicator member accommodating region 13a provided inside the tip side of the first indicator member 13. The diameter of the cylindrical first metal indicator member 15 is set to be slightly smaller than or equal to the diameter of the circular cross section of the metal indicator member accommodating region 13a, which is a cylindrical hollow region in the first indicator member 13. The first metal indicator member 15 is arranged on the tip side of the first indicator member 13 by being inserted into and accommodated in the metal indicator member accommodating region 13a of the first indicator member 13.

[0075] In addition, a plurality of spacer members 27 are dispersedly disposed within the metal index member accommodating region 13a of the first index member 13 together with a plurality of first metal index members 15. The spacer members 27 are formed of synthetic resin, which is a resin material that transmits X-rays, and are formed as cylindrical members. The diameter of the cylindrical spacer members 27 is set to be slightly smaller than or equal to the diameter of the circular cross section of the metal index member accommodating region 13a, which is a cylindrical hollow region of the first index member 13. The spacer member 27 is inserted into and accommodated within the metal index member accommodating region 13a of the first index member 13, and is disposed on the tip side of the first index member 13.

[0076] As described above, the metal indicator member accommodating region 13a of the first index member 13 is provided with the plurality of spacer members 27 together with the plurality of first metal indicator members 15. The plurality of first metal indicator members 15 and the plurality of spacer members 27 are arranged in the metal indicator member accommodating region 13a of the first index member 13 in a state where the first metal indicator members 15 and the spacer members 27 are lined up in order. That is, in the metal indicator member accommodating region 13a on the tip side of the first index member 13, the first metal indicator members 15 and the spacer members 27 are arranged alternately along the extension direction of the first index member 13. In this way, on the tip side of the first index member 13, the plurality of first metal indicator members 15 and the plurality of spacer members 27 are arranged alternately and dispersed along the extension direction of the first index member 13. Furthermore, a cover member 13b that covers the metal index member accommodating area 13a is attached to the tip end of the first index member 13, so that the multiple first metal index members 15 and the multiple spacer members 27 are held within the first index member 13 without falling out of the metal index member accommodating area 13a of the first index member 13.

[0077] The second metal index member 16 is provided as a metal index member disposed on the second index member 14, and is disposed on the tip side of the second index member 14 extending in a cantilevered manner from the main body shaft member 12. The second metal index member 16 is provided as a metal index member for indicating the position of the pin-shaped member 10 that is inserted through the guide member 11 and inserted into the femur 100 under X-ray fluoroscopy. The second metal index member 16 is also provided as a metal index member for indicating the position of the guide member 11 when the surgeon operating the bone treatment instrument 1 views an X-ray fluoroscopic image viewed from the lateral direction of the patient.

[0078] In this embodiment, the second metal index member 16 is provided as a cylindrical metal member, and a plurality of second metal index members 16 are provided in the bone treatment instrument 1, and are arranged on the tip side of the second index member 14 extending in a cantilevered manner from the main body shaft member 12. The plurality of second metal index members 16 arranged on the second index member 14 are arranged in a dispersed manner along the extension direction of the second index member 14. Furthermore, in this embodiment, the plurality of second metal index members 16 are arranged in a dispersed manner at equal intervals on the tip side of the second index member 14.

[0079] 3, the plurality of second metal indicator members 16 are arranged in a dispersed manner along the extension direction of the second indicator member 14 in a cylindrical metal indicator member accommodating region 14a provided inside the tip side of the second indicator member 14. The diameter of the cylindrical second metal indicator member 16 is set to be slightly smaller than or equal to the diameter of the circular cross section of the metal indicator member accommodating region 14a, which is a cylindrical hollow region in the second indicator member 14. The second metal indicator member 16 is arranged on the tip side of the second indicator member 14 by being inserted into and accommodated in the metal indicator member accommodating region 14a of the second indicator member 14.

[0080] In addition, a plurality of spacer members 28 are dispersedly disposed within the metal index member accommodating region 14a of the second index member 14 together with a plurality of second metal index members 16. The spacer members 28 are formed of synthetic resin, which is a resin material that transmits X-rays, and are formed as cylindrical members. The diameter of the cylindrical spacer members 28 is set to be slightly smaller than or equal to the diameter of the circular cross section of the metal index member accommodating region 14a, which is a cylindrical hollow region of the second index member 14. The spacer member 28 is inserted into and accommodated within the metal index member accommodating region 14a of the second index member 14, and is disposed on the tip side of the second index member 14.

[0081] As described above, the metal index member accommodating region 14a of the second index member 14 is provided with the plurality of second metal index members 16 and the plurality of spacer members 28. The plurality of second metal index members 16 and the plurality of spacer members 28 are arranged in the metal index member accommodating region 14a of the second index member 14 in a state where the second metal index members 16 and the spacer members 28 are lined up in order. That is, in the metal index member accommodating region 14a on the tip side of the second index member 14, the second metal index members 16 and the spacer members 28 are arranged alternately along the direction in which the second index member 14 extends. In this way, on the tip side of the second index member 14, the plurality of second metal index members 16 and the plurality of spacer members 28 are arranged alternately, and thereby are arranged dispersedly along the direction in which the second index member 14 extends. Furthermore, a cover member 14b that covers the metal index member accommodating area 14a is attached to the tip end of the second index member 14, so that the multiple second metal index members 16 and the multiple spacer members 28 are held within the second index member 14 without falling out of the metal index member accommodating area 14a of the second index member 14.

[0082] [Operation of the bone treatment instrument when inserting a pin-shaped member into the femur] Next, an operation of the bone treatment instrument 1 when the pin-shaped member 10 is inserted into the femur 100 of a patient using the bone treatment instrument 1 will be described. In this embodiment, the operation of the bone treatment instrument 1 when the pin-shaped member 10 is inserted into the femur 100 on the left side of the patient will be described as an example. In addition, in this embodiment, the explanation will be given on the assumption that preparations for reaching the bone treatment instrument 1 to the lateral part 100a of the femur 100 have been completed by, for example, incising the soft tissue on the lateral side of the femur 100 of the patient as a preparation before the bone treatment instrument 1 is used. Furthermore, in this embodiment, the explanation will be given on the assumption that a transmission device configured as an X-ray device is arranged to image the hip joint of a patient placed on an operating table from the front side in the front direction of the patient (upper side with respect to the patient lying supine) and from the left side in the lateral direction of the patient (left-right direction of the patient).

[0083] When the bone treatment instrument 1 is used, first, the guide member 11, the first index member 13, and the second index member 14 are attached to the main body shaft member 12. That is, the guide member 11 is attached to the main body shaft member 12 by being inserted through the insertion hole 24 and screwed into it, the first index member 13 is attached to the main body shaft member 12 by being fitted into the mounting hole 21a, and the second index member 14 is attached to the main body shaft member 12 by being fitted into one of the mounting holes 25a, 25b, 26a, and 26b. In this embodiment, an example is shown in which the second index member 14 is attached to the main body shaft member 12 by being fitted into the mounting hole 25a.

[0084] 8 to 11 are diagrams schematically showing a state in which the bone treatment instrument 1 is used in a procedure in which the pin-shaped member 10 is inserted into the femur 100. FIG. 8 schematically shows a state in which the bone treatment instrument 1 is used, viewed obliquely from the front side in the patient's front direction. FIG. 9 schematically shows a state in which the bone treatment instrument 1 is used, viewed obliquely from the left side in the patient's lateral direction. FIG. 10 schematically shows a state in which the bone treatment instrument 1 is used, viewed from the front side in the patient's front direction. FIG. 11 schematically shows a state in which the bone treatment instrument 1 is used, viewed from the left side in the patient's lateral direction. Note that FIGS. 8 and 9 only show the proximal portion of the femur 100 and the bone treatment instrument 1, and other elements are omitted from the illustration. 8 and 9 do not show the patient's soft tissue, parts of the femur 100 other than the proximal part, and the surgeon operating the bone treatment instrument 1. Also, in Figures 10 and 11, only a part of the patient's femur and the bone treatment instrument 1 are shown, and other elements are not shown.

[0085] 8 to 11, the surgeon, who has attached the guide member 11, the first index member 13, and the second index member 14 to the main body shaft member 12, abuts the tip end 11d of the guide member 11 against a position on the lateral portion 100a of the femur 100 where the pin-shaped member 10 will be inserted. Note that FIGS. 8 to 11 show a state in which the tip end 11d of the guide member 11 is positioned below the greater trochanter 100b of the lateral portion 100a of the femur 100 (lower in the patient's up-down direction). After abutting the tip end 11d of the guide member 11 against the position on the lateral portion 100a of the femur 100 where the pin-shaped member 10 will be inserted, the surgeon positions the first index member 13 forward in the patient's frontal direction, and positions the first surface S1, on which the first index member 13 and the guide member 11 are positioned, along the patient's frontal direction. Furthermore, with the first surface S1 positioned along the front direction of the patient, the second index member 14 is positioned on the left side in the lateral direction of the patient, and the second surface S2 on which the second index member 14 and the guide member 11 are arranged is positioned along the lateral direction of the patient.

[0086] As described above, the surgeon operates the bone treatment instrument 1 so that the first surface S1 is positioned along the front direction of the patient and the second surface S2 is positioned along the lateral direction of the patient. Referring to Fig. 10, the surgeon adjusts the position and direction of the guide member 11 while checking the position and direction of the guide member 11 in the front direction of the patient by viewing the first index member 13 from outside the patient's soft tissue 101 along the first surface S1 on which the first index member 13 and the guide member 11 are arranged. Referring to Fig. 11, the surgeon adjusts the position and direction of the guide member 11 while checking the position and direction of the guide member 11 in the lateral direction of the patient by viewing the second index member 14 from outside the patient's soft tissue 101 along the second surface S2 on which the second index member 14 is arranged and which is perpendicular to the longitudinal direction X1 of the main shaft member 12. In this way, the surgeon adjusts the position and direction in which the pin-shaped member 10 inserted into the guide member 11 is inserted into the femur 100 while checking the position and direction in both the front and side directions of the patient.

[0087] 10 on the monitor of the transmission device, the surgeon adjusts the position and direction while checking the position and direction at which the pin-shaped member 10 indexed by the first metal index member 15 arranged on the first index member 13 is inserted into the guide member 11 and further inserted into the femur 100. Furthermore, by viewing a fluoroscopic image on the monitor of the transmission device from the same viewpoint as that shown in Fig. 11, the surgeon adjusts the position and direction while checking the position and direction at which the pin-shaped member 10 indexed by the second metal index member 16 arranged on the second index member 14 is inserted into the guide member 11 and further inserted into the femur 100.

[0088] 12 and 13 are diagrams schematically illustrating a state in which the bone treatment instrument 1 is used in a procedure in which the pin-shaped member 10 is inserted into the femur 100, and are diagrams illustrating a fluoroscopic image that can be seen on the monitor 200 of the transmission device. Note that FIG. 12 shows a fluoroscopic image taken from the front side in the front direction of the patient, showing a state in which the bone treatment instrument 1 is being used, and the result of photographing the state shown in FIG. 10 with the transmission device is displayed as the fluoroscopic image shown in FIG. 12. Also, FIG. 13 shows a fluoroscopic image taken from the left side in the lateral direction of the patient, showing a state in which the bone treatment instrument 1 is being used, and the result of photographing the state shown in FIG. 11 with the transmission device is displayed as the fluoroscopic image shown in FIG. 13. Note that in FIGS. 12 and 13 and the following description, images projected on the monitor 200 as images of each component of the bone treatment instrument 1 and the femur 100 will be illustrated and explained by denoting the corresponding component of the bone treatment instrument 1 and the femur 100 with a symbol "M" added before the symbol.

[0089] In a fluoroscopic image taken with the fluoroscopic device, images of the main body shaft member 12, the first index member 13, and the second index member 14, which are made of a resin material through which X-rays pass, are not displayed, but images of the guide member 11, the first metal index member 15, and the second metal index member 16, which are made of a metal material that suppresses the transmission of X-rays, are displayed. Therefore, referring to Fig. 12, in a fluoroscopic image taken from the front side in the front direction of the patient, an image M100 of the femur 100, an image M11 of the guide member 11, and an image M15 of the first metal index member 15, which indicates the insertion position and insertion direction of the pin-shaped member 10 that will be inserted into the guide member 11 and further inserted into the femur 100, are displayed. Note that the first metal index members 15 are arranged in a dispersed manner in the first index member 13. Therefore, in a fluoroscopic image taken from the front direction of the patient, multiple images M15 of the first metal index members 15 are displayed in a dispersed manner, as indicated by dashed lines. 13, a fluoroscopic image taken from the left side in the lateral direction of the patient displays an image M100 of the femur 100, an image M11 of the guide member 11, and an image M16 of the second metal index member 16 that indicates the insertion position and insertion direction of the pin-shaped member 10 that is inserted into the guide member 11 and further inserted into the femur 100. The second metal index members 16 are arranged in a dispersed manner in the second index member 14. Therefore, in the fluoroscopic image taken from the lateral direction of the patient, the images M16 of the second metal index members 16 are displayed in a dispersed manner as indicated by the dashed lines.

[0090] The surgeon positions the first surface S1 along the front direction of the patient and the second surface S2 along the lateral direction of the patient, and then checks the fluoroscopic image displayed on the monitor 200 of the fluoroscopic device. First, referring to Fig. 12, the surgeon looks at the fluoroscopic image captured from the front direction of the patient to check the position and direction of the image M11 of the guide member 11 and the positions and directions of the images M15 of the multiple first metal indicator members 15. The image M11 of the guide member 11 and the images M15 of the multiple first metal indicator members 15 indicate, from the viewpoint in the front direction of the patient, the position and direction of the guide member 11 relative to the femur 100 and the position and direction in which the pin-shaped member 10 inserted through the guide member 11 is inserted into the femur 100. The surgeon looks at the fluoroscopic image of the patient from the front and checks the position and direction of image M11 and the position and direction of the multiple images M15 lined up, and operates the bone treatment instrument 1 so that the positions and directions of images M11 and M15 overlap with the insertion position and insertion direction of the targeted pin-shaped member 10, thereby adjusting the position and direction at which the pin-shaped member 10 inserted into the guide member 11 is inserted into the femur 100.

[0091] 13, the surgeon views a fluoroscopic image taken from the side of the patient to confirm the position and direction of the image M11 of the guide member 11 and the position and direction in which the images M16 of the multiple second metal indicator members 16 are arranged. The image M11 of the guide member 11 and the images M16 of the multiple second metal indicator members 16 indicate, from the perspective of the side of the patient, the position and direction of the guide member 11 relative to the femur 100 and the position and direction in which the pin-shaped members 10 inserted through the guide member 11 are inserted into the femur 100. The surgeon looks at the lateral X-ray image of the patient and checks the position and direction of image M11 and the position and direction of the multiple images M16 lined up, and operates the bone treatment instrument 1 so that the positions and directions of images M11 and M16 overlap with the insertion position and insertion direction of the targeted pin-shaped member 10, thereby adjusting the position and direction at which the pin-shaped member 10 inserted into the guide member 11 is inserted into the femur 100.

[0092] As described above, by viewing the X-ray image from the front and the X-ray image from the side of the patient, the surgeon can check the position and direction in which the pin-shaped member 10 inserted into the guide member 11 will be inserted into the femur 100 in both the front and side directions of the patient, and adjust the position and direction in which the pin-shaped member 10 will be inserted.

[0093] When the adjustment of the position and direction in which the pin-shaped member 10 is inserted into the femur 100 is completed, the surgeon inserts the pin-shaped member 10 into the guide member 11 while maintaining the position and orientation of the bone treatment instrument 1 relative to the femur 100, and inserts the pin-shaped member 10 into the femur 100. At this time, the surgeon inserts the pin-shaped member 10 into the femur 100 while checking that the image of the pin-shaped member 10 overlaps in order with the multiple images M15, which are images of the multiple first metal indicator members 15, in a fluoroscopic image taken from the front of the patient. Furthermore, the surgeon inserts the pin-shaped member 10 into the femur 100 while checking that the image of the pin-shaped member 10 overlaps in order with some of the multiple images M16, which are images of the multiple second metal indicator members 16, in a fluoroscopic image taken from the side of the patient. In this way, the pin-shaped member 10 is inserted into the femur 100 at the insertion position and insertion direction confirmed and adjusted as described above.

[0094] When the insertion of the pin-shaped member 10 into the femur 100 is complete, the bone treatment instrument 1 is removed from the pin-shaped member 10 while the pin-shaped member 10 remains inserted into the femur 100. That is, the bone treatment instrument 1 is moved away from the patient so that the pin-shaped member 10 is extracted from the guide member 11, and the bone treatment instrument 1 is removed from the pin-shaped member 10. This completes the procedure of inserting the pin-shaped member 10 into the patient's femur 100. After the procedure of inserting the pin-shaped member 10 into the femur 100 is completed, the next surgical procedure is subsequently performed on the patient.

[0095] [Actions and Effects of This Embodiment] As described above, according to the present embodiment, first index member 13 extends from main body shaft member 12, with guide member 11 attached to it in a direction different from longitudinal direction X1 of main body shaft member 12, in a position different from guide member 11 and in a direction different from longitudinal direction X1 of main body shaft member 12, along first plane S1 that includes the direction in which guide member 11 extends, to index the position of guide member 11. That is, first index member 13 is disposed so as to extend along first plane S1, which is the plane on which guide member 11 is disposed, and first plane S1 is defined as a plane that includes the directions in which first index member 13 and guide member 11 extend. When a surgeon operating bone treatment instrument 1 views first index member 13 along first plane S1 on which first index member 13 and guide member 11 are disposed, first index member 13 and guide member 11 are disposed, and the first index member 13 and guide member 11 are disposed in an overlapping state in the direction along first plane S1. Therefore, the surgeon can easily grasp the position and direction of the guide member 11 pointed by the first index member 13 in the front direction of the patient without relying on the surgeon's experience, simply by arranging the first surface S1, on which the first index member 13 and the guide member 11 are arranged, along the front direction of the patient, and looking at the first index member 13 along the first surface S1. Furthermore, the surgeon can easily grasp the position and direction of the pin-shaped member 10 inserted into the guide member 11 pointed by the first index member 13 in the front direction of the patient without relying on the surgeon's experience, simply by looking at the first index member 13.

[0096] Furthermore, according to this embodiment, second index member 14 extends from main body shaft member 12, which is attached with guide member 11 extending in a direction different from longitudinal direction X1 of main body shaft member 12, at the same position as guide member 11 in longitudinal direction X1 of main body shaft member 12, in a direction different from longitudinal direction X1 of main body shaft member 12, and extends along second plane S2 that is perpendicular to first plane S1 and includes the direction in which guide member 11 extends, to index the position of guide member 11. In other words, second index member 14 is arranged to extend along second plane S2, which is perpendicular to first plane S1 on which guide member 11 and first index member 13 are arranged and is the plane on which guide member 11 is arranged. When a surgeon operating the bone treatment instrument 1 views the second index member 14 along a second surface S2, which is perpendicular to the first surface S1 and on which the second index member 14 and the guide member 11 are disposed, the second index member 14 and the guide member 11 are disposed in an overlapping state in the direction along the second surface S2. Therefore, the surgeon can easily grasp the position and direction of the guide member 11, which is pointed by the second index member 14, in the lateral direction of the patient, simply by arranging the first surface S1 along the front direction of the patient and the second surface S2, on which the second index member 14 and the guide member 11 are disposed, along the lateral direction of the patient, without relying on the surgeon's experience, by simply viewing the second index member 14. Furthermore, the surgeon can easily grasp the position and direction of the pin-shaped member 10 inserted into the guide member 11, which is pointed by the second index member 14, in the lateral direction of the patient, without relying on the surgeon's experience, simply by looking at the second index member 14.

[0097] Therefore, according to this embodiment, the surgeon positions the first surface S1 along the front direction of the patient and the second surface S2 along the lateral direction of the patient, and can view the first index member 13 in the front direction of the patient, and then view the second index member 14 in the lateral direction of the patient. This alone allows the surgeon to easily grasp, without relying on the surgeon's experience, the exact position and direction of the pin-shaped member 10 that will be inserted through the guide member 11 and inserted into the bone 100, when viewed from either the front direction or the lateral direction of the patient. Note that, when the surgeon performs a procedure in which the pin-shaped member 10 is inserted into the affected bone 100 of the patient during surgery, first, the tip of the tubular guide member is positioned at the position in the affected bone 100 where the pin-shaped member 10 will be inserted. At this time, the tip side portion of the guide member 11 is inserted into the patient's soft tissue 101 and is hidden from the outside, but the surgeon can see the first index member 13 along the first surface S1 from the front direction of the patient, and then see the second index member 14 along the second surface S2 from the side direction of the patient to confirm it. This allows the surgeon to accurately and easily grasp the position and direction of the guide member 11 pointed by the first index member 13 and the second index member 14, and the position and direction in which the pin-shaped member 10 inserted through the guide member 11 is inserted into the bone 100 of the affected area.

[0098] Furthermore, according to this embodiment, the first index member 13 is formed of a resin material that is a material through which X-rays pass, and a first metal index member 15 formed of a metal material that suppresses X-ray transmission is disposed on the tip side of the first index member 13 extending from the main body shaft member 12. Therefore, even under X-ray fluoroscopy, the surgeon can easily confirm the image M100 of the patient's bone 100 and the image M15 of the first metal index member 15 disposed on the tip side of the first index member 13 by arranging the first surface S1, on which the first index member 13 and the guide member 11 are disposed, along the front direction of the patient and viewing an X-ray fluoroscopic image from the viewpoint of the front direction of the patient. This allows the surgeon to easily grasp, without relying on the surgeon's experience, the position and direction in which the pin-shaped member 10 indexed by the first metal index member 15 disposed on the tip side of the first index member 13 will be inserted into the guide member 11 and further pierced into the bone 100 in the front direction of the patient.

[0099] Furthermore, according to this embodiment, the second index member 14 is formed of a resin material that is a material through which X-rays pass, and a second metal index member 16 formed of a metal material that suppresses X-ray transmission is disposed on the tip side of the second index member 14 extending from the main body shaft member 12. Therefore, even under X-ray fluoroscopy, the surgeon can easily confirm an image M100 of the patient's bone 100 and an image M16 of the second metal index member 16 disposed on the tip side of the second index member 14 by arranging the first surface S1 along the front direction of the patient and arranging the second surface S2, on which the second index member 14 and the guide member 11 are disposed, along the lateral direction of the patient, and viewing an X-ray fluoroscopic image from the perspective of the patient's lateral direction. This allows the surgeon to easily grasp, without relying on the surgeon's experience, the position and direction in the lateral direction of the patient where the pin-shaped member 10 indexed by the second metal index member 16 disposed on the tip side of the second index member 14 will be inserted into the guide member 11 and further inserted into the bone 100.

[0100] Therefore, according to this embodiment, the surgeon positions the first surface S1 along the front direction of the patient and positions the second surface S2 along the lateral direction of the patient, and can see an image M15 of the first metal index member 15 arranged on the tip side of the first index member 13 in an X-ray fluoroscopic image taken in the front direction of the patient, and then can see an image M16 of the second metal index member 16 arranged on the tip side of the second index member 14 in an X-ray fluoroscopic image taken in the lateral direction of the patient. With this alone, the surgeon can easily grasp the exact position and direction of the pin-shaped member 10 to be inserted through the guide member 11 and inserted into the bone 100, regardless of whether the image is taken in the front direction or the lateral direction of the patient, without relying on the surgeon's experience.

[0101] As described above, the surgeon grasps the exact position and direction of the pin-shaped member 10, which will be inserted through the guide member 11 and inserted into the bone 100, when viewed from either the front or side of the patient. Then, the surgeon inserts the pin-shaped member 10 into the bone 100. First, the pin-shaped member 10 is inserted through the guide member 11. The pin-shaped member 10 is then inserted into the bone 100 while being guided in its insertion direction by the guide member 11. At this time, the surgeon can accurately grasp, without experience, the insertion position and insertion direction of the pin-shaped member 10 into the bone 100, when viewed from either the front or side of the patient, by using the first index member 13 and the first metal index member 15 disposed thereon and the second index member 14 and the second metal index member 16 disposed thereon. Then, the surgeon can easily insert the pin-shaped member 10 into the bone 100 accurately along the grasped insertion position and insertion direction. Therefore, using the bone treatment instrument 1, an operator can easily insert the pin-shaped member 10 into the patient's bone 100 at the correct position and direction, regardless of the operator's experience.

[0102] Therefore, according to this embodiment, it is possible to provide a bone treatment instrument 1 that can easily insert the pin-shaped member 10 into the patient's bone 100 at the correct position and direction regardless of the operator's experience.

[0103] Furthermore, according to this embodiment, when the surgeon positions the first surface S1 along the front direction of the patient and views an X-ray fluoroscopic image from the viewpoint of the front direction of the patient, the surgeon can confirm an image M100 of the patient's bone 100 and images M15 of the first metal index members 15 arranged in a dispersed manner at the tip end side of the first index member 13. This allows the surgeon to grasp, in the front direction of the patient, the position and direction in which the pin-shaped member 10 is inserted into the guide member 11 and further inserted into the bone 100, as the images M15 of the first metal index members 15 arranged in a dispersed manner as shown by the dashed lines. This allows the surgeon to more clearly and easily grasp the position and direction in which the pin-shaped member 10 is inserted into the bone 100. This also allows the surgeon to perform the procedure with greater peace of mind.

[0104] Furthermore, according to this embodiment, when the surgeon positions the first surface S1 along the front direction of the patient and the second surface S2 along the lateral direction of the patient, and views an X-ray fluoroscopic image from the perspective of the patient's lateral direction, the surgeon can confirm an image M100 of the patient's bone 100 and images M16 of the second metal index members 16 arranged in a dispersed manner at the tip end side of the second index member 14. This allows the surgeon to grasp, in the lateral direction of the patient, the position and direction in which the pin-shaped member 10 is inserted into the guide member 11 and further inserted into the bone 100, as the images M16 of the second metal index members 16 arranged in a dispersed manner as shown by the broken lines. This allows the surgeon to more clearly and easily grasp the position and direction in which the pin-shaped member 10 is inserted into the bone 100. This also allows the surgeon to perform the procedure with greater peace of mind.

[0105] Furthermore, according to this embodiment, the guide member 11 can be easily attached to the main body shaft member 12 in a state in which it extends in a direction different from the longitudinal direction of the main body shaft member 12 using a simple structure in which the guide member 11 is inserted into the main body shaft member 12.

[0106] Furthermore, according to this embodiment, second index member 14 is attached to main shaft member 12 in a cantilevered state, and therefore second index member 14 is attached to main shaft member 12 with an end of second index member 14 connected to main shaft member 12. Therefore, with the simple structure of connecting the end of second index member 14 to main shaft member 12, second index member 14 can be easily attached to main shaft member 12 in a state where it extends from main shaft member 12 in a direction different from the longitudinal direction of main shaft member 12.

[0107] Furthermore, according to this embodiment, the first index member 13 and the guide member 11 are provided to extend parallel to each other from the main body shaft member 12. Therefore, when the surgeon inserts the guide member 11 into the patient's soft tissue 101 from the patient's lateral side toward the patient's affected bone 100 and positions the first surface S1, on which the first index member 13 and the guide member 11 are disposed, along the patient's frontal direction, the surgeon can position the first index member 13 along a direction parallel to the patient's lateral side. That is, the first index member 13 can be positioned on the patient's front side so as to extend along a direction perpendicular to the patient's frontal direction. Therefore, when the surgeon determines the position and direction of the guide member 11 pointed by the first index member 13 in the patient's frontal direction, the surgeon can easily manipulate the first index member 13 on the patient's front side along a direction substantially parallel to the patient's body. This further improves operability when determining the position and direction of the guide member 11 in the patient's frontal direction while viewing the first index member 13 along the first surface S1.

[0108] Furthermore, according to this embodiment, second index member 14 can be attached to main body shaft member 12 at any of a plurality of locations selected in the circumferential direction of main body shaft member 12. Therefore, the angle of intersection between guide member 11 extending from main body shaft member 12 and second index member 14 can be appropriately changed depending on the relationship between the patient's bone 100 and the position and direction at which pin-shaped member 10 is inserted into the patient's bone 100, making it easier to confirm using second index member 14. This makes it even easier to grasp the position and direction at which pin-shaped member 10 is inserted into the patient's bone 100.

[0109] Furthermore, according to this embodiment, the flange portion 23 of the main body shaft member 12 is provided with the insertion hole 24 of the guide member 11 and the multiple mounting holes 25a, 25b or multiple mounting holes 26a, 26b for mounting the second index member 14. This increases the degree of freedom in setting the mountable position of the second index member 14 relative to the main body shaft member 12, and also increases the degree of freedom in setting the intersecting angle between the guide member 11 extending from the main body shaft member 12 and the second index member 14. This allows for more flexible setting of the intersecting angle between the guide member 11 and the second index member 14 according to the physique of each patient, making it easier to determine the position and direction in which the pin-shaped member 10 is inserted into the patient's bone 100.

[0110] [Variations] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. For example, the following modifications may be made.

[0111] (1) In the above-described embodiment, the bone into which the pin-shaped member is inserted using the bone treatment instrument is the femur, but this is not necessarily the case. That is, the bone treatment instrument may be implemented in a form used in a procedure in which a pin-shaped member is inserted into a bone other than the femur.

[0112] (2) In the above embodiment, the pin-shaped member inserted into the bone by the bone treatment instrument is a needle-shaped pin, but this is not the only option. The pin-shaped member inserted into the bone by the bone treatment instrument may be in various forms other than a needle-shaped pin, such as a drill or a screw.

[0113] (3) In the above embodiment, the guide member is inserted into the main shaft member and attached to the main shaft member, but this is not necessarily the case. That is, the guide member may be attached to the main shaft member in a manner other than insertion. For example, the main shaft member may be provided with a groove for fitting the guide member so that the guide member extends in a direction different from the longitudinal direction of the main shaft member, and the guide member may be fitted into the groove to attach the guide member to the main shaft member.

[0114] (4) In the above embodiment, a configuration in which multiple metal indicator members are arranged on the tip side of each of the first and second indicator members has been described as an example, but this is not necessarily the case. A configuration in which only one metal indicator member is arranged on the tip side of the first indicator member may also be implemented, and a configuration in which only one metal indicator member is arranged on the tip side of the second indicator member may also be implemented.

[0115] (5) In the above embodiment, the metal indicator member is disposed inside the first and second indicator members. However, this is not necessarily the case. The metal indicator member may be attached to the surfaces of the first and second indicator members. For example, the metal indicator member may be disposed on the first and second indicator members by being fitted into recesses formed on the surfaces of the first and second indicator members. Alternatively, the metal indicator member may be made of a thin foil-like metal material and attached to the surfaces of the first and second indicator members by being attached with an adhesive. [Industrial Applicability]

[0116] The present invention can be widely applied as a bone treatment instrument used when performing a treatment of inserting a pin-shaped member into a patient's bone. [Explanation of symbols]

[0117] 1 Bone treatment instruments 10 Pin-shaped member 11 Guide member 12 Main body shaft member 13 First index member 14 Second index member 15 First metal indicator member (metal indicator member) 16 Second metal indicator member (metal indicator member) 100 Femur (bone)

Claims

1. A bone treatment instrument used when performing a treatment of inserting a pin-shaped member into a patient's bone, a cylindrical guide member made of a metal material, through which the pin-shaped member to be inserted into the bone is inserted, and which guides the direction in which the pin-shaped member is inserted into the bone; a main shaft member formed in a shaft shape having a longitudinal direction, to which the guide member is attached in a state of extending in a direction different from the longitudinal direction; a first index member and a second index member, each made of a resin material, wood, or paper, attached to the main body shaft member so as to extend from the main body shaft member in a direction different from the longitudinal direction, and each indexing the position of the guide member; Equipped with the first indicator member is attached to the main shaft member at a position different from a position at which the guide member is attached in the longitudinal direction, so as to extend along a first plane defined as a plane including a direction in which the guide member extends; the first surface is defined as a surface including a direction in which the first indicator member extends and a direction in which the guide member extends, the second indicator member is attached to the main shaft member at the same position in the longitudinal direction as the guide member is attached, so as to extend in a direction different from the direction in which the guide member extends along a second plane that is perpendicular to the first plane and includes the direction in which the guide member extends, a first index member and a second index member each having a metal index member formed of a metal material at a tip end thereof extending from the main shaft member, the metal index member being inserted through the guide member and used to indicate the position of the pin-shaped member to be inserted into the bone.

2. The bone treatment instrument according to claim 1, a plurality of metal index members are arranged on the tip side of the first index member, and the plurality of metal index members arranged on the first index member are arranged in a dispersed manner along the direction in which the first index member extends.

3. The bone treatment instrument according to claim 1 or 2, A bone treatment instrument characterized in that a plurality of the metal indicator members are arranged on the tip side of the second indicator member, and the plurality of metal indicator members arranged on the second indicator member are arranged in a dispersed manner along the direction in which the second indicator member extends.

4. The bone treatment instrument according to any one of claims 1 to 3, The bone treatment instrument, wherein the main body shaft member is inserted and attached in a state in which the guide member extends in a direction different from the longitudinal direction.

5. The bone treatment instrument according to any one of claims 1 to 4, The bone treatment instrument, wherein the second indicator member is attached to the main shaft member in a state where it extends in a cantilevered manner from the main shaft member.

6. The bone treatment instrument according to any one of claims 1 to 5, the first indicator member is attached to the main body shaft member so as to extend from the main body shaft member along a direction parallel to a direction in which the guide member extends from the main body shaft member.

7. The bone treatment instrument according to any one of claims 1 to 6, The bone treatment instrument, wherein the main body shaft member is provided with the second index members attached at a plurality of positions in the circumferential direction of the main body shaft member.

8. The bone treatment instrument according to claim 7, a flange portion provided on the main body shaft member so as to extend in a direction perpendicular to the longitudinal direction, the flange portion having an insertion hole through which the guide member is inserted and a plurality of mounting holes into which ends of the second indicator member are fitted to mount the second indicator member.

Images