JP2018102551A - Syringe and treatment set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe which can rapidly and surely inject fluid to a defective part on an object and a treatment set having the syringe.SOLUTION: A treatment set used for a backbone rear-side fixing operation method includes a syringe 1 and a guide wire 2 used with the syringe 1. The syringe 1 includes: an outer cylinder 3 in which a bone prosthetic material F is stored; a thin and long discharge pipe 4 provided at a tip of the outer cylinder 3; a gasket 5 that fluid-tightly slides in the outer cylinder 3; and a plunger 6 which is connected to the gasket 5 and movably operates the gasket 5 in the outer cylinder 3. The plunger 6 includes a long plunger body 61 which includes a through hole 60 formed along an axial direction. The syringe 1 is used with the guide wire 2 inserted through the through hole 60 and the discharge pipe 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a syringe and a treatment set.

  For example, posterior spinal fusion is performed as a treatment for spinal degeneration / spondylolisthesis, spinal stenosis, disc herniation, compression fracture, and the like.

  In this posterior spinal fusion, screws are screwed into individual vertebrae, and these screws are connected to correction rods straddling the upper and lower vertebrae. As a result, the upper and lower vertebrae are fixed while their separation distance is maintained at an appropriate size. As a result, the stability of the spine is ensured with the nerve compression removed.

  In such posterior spinal fusion, if the vertebra (bone) has sufficient strength, the screw is screwed into the vertebra either directly or after drilling the pilot hole, but still between the vertebra and the screw. Sufficient bonding strength can be obtained.

  However, if the cortical bone that forms the surface of the vertebra is thin or the trabecular bone of the cancellous bone is thin, the vertebra does not have sufficient strength. Even if screwed, sufficient fixation strength may not be obtained between the vertebra and the screw. Therefore, there is a problem that the distance between the upper and lower vertebrae cannot be maintained at an appropriate size, and the posterior spinal fixation cannot be performed in the first place.

  In order to solve these problems, a method has been proposed in which a bone prosthetic material (artificial bone) is inserted into a prepared hole formed in a vertebra, and then a screw is screwed into the vertebra through the bone prosthetic material. (For example, refer to Patent Document 1). It is important to perform such work quickly in order to reduce the burden on the patient.

JP 2000-84062 A

  An object of the present invention is to provide, for example, a syringe capable of quickly and reliably injecting a bone filling material (fluid) into a prepared hole (defect) formed in a vertebra (object), and a treatment set having such a syringe. It is in.

Such an object is achieved by the present invention described in the following (1) to (14).
(1) an outer cylinder capable of storing fluid;
A discharge port protruding from the tip of the outer cylinder and discharging the fluid;
A gasket slidably provided in the outer cylinder;
A syringe comprising a through-hole formed along an axial direction and having a plunger for moving the gasket within the outer cylinder.

  Thereby, it becomes possible to use it with the elongate member which guides a syringe, and fluid can be rapidly and reliably inject | poured into the defect | deletion part of an object.

  (2) The syringe according to (1), wherein a central axis of the through hole and a central axis of the discharge port substantially coincide with each other.

  Thereby, when using with a long member, a long member can be easily and rapidly inserted by a through-hole and a discharge port.

  (3) The syringe according to (1) or (2), wherein a central axis of the discharge port and a central axis of the outer cylinder substantially coincide with each other.

  Thereby, when using with a long member, a long member can be easily and rapidly inserted by a through-hole and a discharge port.

(4) The plunger includes a long plunger body,
Any of (1) to (3) above, wherein X / Y is 3 or more and 200 or less, where X [mm ² ] is the cross-sectional area of the plunger body and Y [mm ² ] is the cross-sectional area of the through hole. The syringe according to crab.

  Thereby, when using with a long member, preventing the mechanical strength of a plunger main body falling, the through-hole of sufficient size to penetrate a long member is securable.

  (5) The outer cylinder includes any one of the above (1) to (4), which includes a cylindrical main body and a lid body that is screwed onto the tip of the main body and to which the discharge port is connected. The syringe described.

  By attaching the lid to the main body by screwing, it is difficult to detach from the main body even when the pressure applied to the fluid in the outer cylinder is large. For this reason, a fluid can be reliably inject | poured into a defect | deletion part.

(6) The syringe according to any one of (1) to (5), wherein the syringe is used in a state where a long member is inserted through the through hole and the discharge port.
Thereby, a syringe can be advanced using a long member.

  (7) When the elongate member is inserted into the through hole and the discharge port, the gasket is pierced by the elongate member, and in this state, the gasket adheres to the outer surface of the elongate member. The syringe according to (6).

  Thereby, even if the plunger is operated to move the gasket toward the distal end, the fluid in the outer cylinder is prevented from entering the through hole.

(8) The above (6), wherein Y / Z is 1.1 or more and 200 or less, where Y [mm ² ] is the cross-sectional area of the through hole and Z [mm ² ] is the cross-sectional area of the long member. Or the syringe as described in (7).
Thereby, a long member can be smoothly inserted in a through-hole.

(9) When the cross-sectional area of the elongate member is Z [mm ² ] and the cross-sectional area of the lumen portion of the discharge port is W [mm ² ], W / Z is 1.5 or more and 200 or less. The syringe according to any one of (6) to (8) above.

  Thereby, even in the state where the long member is inserted into the discharge port, the fluid can be smoothly discharged from the outer cylinder.

  (10) The syringe according to any one of (6) to (9), wherein the long member is a guide wire.

(11) A treatment set used to inject fluid into a defect of an object,
The syringe according to any one of (1) to (10) above,
A treatment set comprising: an elongated member that is inserted through the through hole and the discharge port and guides the discharge port of the syringe to the defect portion or the vicinity thereof.
Thereby, it is possible to quickly and surely fill the defect portion of the object with the fluid.

(12) The treatment set according to (11), further including a through-hole through which the elongated member can be inserted and having an insertion tool inserted into the defect portion.
With the insertion tool having such a configuration, it can be quickly and reliably inserted into the defect portion.

  (13) The treatment set according to (11) or (12), wherein the long member is a guide wire.

(14) The treatment set according to any one of (11) to (13), wherein the fluid has a viscosity of 10 ⁵ mPa · s to 10 ⁹ mPa · s.

  If it is the fluid which has this viscosity, the narrow space between a discharge port and an elongate member can be smoothly passed.

  According to the present invention, by using with a long member for guiding a syringe, fluid can be quickly and surely filled into a defect portion of an object.

It is a partial section side view showing an embodiment of a syringe. It is a partial cross section side view which shows the state which accommodated the bone grafting material in the syringe of FIG. It is a fragmentary sectional side view which shows the state which penetrated the guide wire to the syringe of FIG. It is a fragmentary sectional side view which shows the state which moved and operated the plunger of the syringe of FIG. It is a side view which shows the structure of a screw. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion. It is a figure for demonstrating posterior spinal fusion.

  Hereinafter, the syringe and treatment set of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<Processing set>
FIG. 1 is a partial cross-sectional side view showing an embodiment of the syringe, FIG. 2 is a partial cross-sectional side view showing a state where a bone grafting material is stored in the syringe of FIG. 1, and FIG. 3 is a guide wire in the syringe of FIG. FIG. 4 is a partial sectional side view showing a state in which the plunger of the syringe of FIG. 3 is moved, FIG. 5 is a side view showing the configuration of the screw, and FIGS. It is a figure for demonstrating posterior spinal fusion. In the following, the left side in FIGS. 1 to 4 is referred to as “tip” or “tip side”, and the right side is referred to as “base end” or “base end side”. In addition, the upper side in FIGS. 6 to 11 is referred to as “tip” or “tip side”, and the lower side is referred to as “base end” or “base end side”.

  The treatment set of the present embodiment is a surgical set used for posterior spinal fusion. This treatment set includes a syringe 1, a guide wire 2 (long member) used with the syringe 1, a screw 10 (insertion tool), and a rod 20.

<< Syringe >>
As shown in FIG. 1, the syringe 1 includes an outer cylinder 3, an elongated discharge pipe 4 (discharge port) provided at the tip of the outer cylinder 3, and a gasket 5 that slides liquid-tightly within the outer cylinder 3. The plunger 5 is connected to the gasket 5 and moves the gasket 5 within the outer cylinder 3.

  An inner space surrounded by the gasket 5 is defined in the outer cylinder 3. The volume of the internal space is not particularly limited, but is preferably about 20 mL to 300 mL, more preferably about 50 mL to 200 mL. As shown in FIG. 2, a paste-like bone filling material F is accommodated in this internal space. Examples of the bone grafting material F include a mixture of a cement powder and a hardening liquid.

  Examples of the cement powder include cement mainly composed of α-type tricalcium phosphate, quaternary calcium phosphate and the like. Specifically, as the cement powder, α-type tricalcium phosphate or quaternary calcium phosphate alone and a mixture thereof, a mixture of α-type third calcium phosphate and second calcium phosphate and / or first calcium phosphate, quaternary calcium phosphate and second calcium phosphate. A mixture of calcium phosphate and / or first calcium phosphate, a mixture of α-type third calcium phosphate, fourth calcium phosphate, second calcium phosphate and / or first calcium phosphate, and the like are preferably used.

  On the other hand, as the curable liquid, for example, an aqueous solution in which an organic acid such as water, polyacrylic acid, citric acid, malic acid or a mixture thereof is dissolved, sodium chloride, sodium chondroitin sulfate, sodium succinate, sodium lactate or these An aqueous solution in which water-soluble salts such as a mixture are dissolved is preferably used.

  The outer cylinder 3 includes a cylindrical main body 31 and a lid body 32 attached to the distal end portion of the main body 31. A screw thread 311 is formed on the outer periphery of the distal end portion of the main body 31, and a screw groove 321 is formed on the inner periphery on the proximal end side of the lid body 32. Therefore, in this embodiment, the lid body 32 is attached to the main body 31 by screwing. The lid body 32 may be configured to be attached to the main body 31 by fitting.

  A plate-like flange 312 is integrally formed on the outer periphery of the base end of the outer cylinder 3 (main body 31). When the plunger 6 is moved and operated relative to the outer cylinder 3, the operation can be performed by placing a finger or the like on the flange 312.

  A connecting portion 322 that is reduced in diameter from the body portion of the outer cylinder 3 (lid body 32) and protrudes toward the distal end is integrally formed at the center of the distal end of the lid body 32. The proximal end portion of the discharge pipe 4 is inserted and fixed inside the connection portion 322. Although the fixing method to the connection part 322 of the discharge pipe 4 is not specifically limited, For example, caulking, adhesion | attachment by an adhesive agent, melt | fusion, etc. are mentioned.

  As a constituent material of the outer cylinder 3 and the plunger 6, for example, polyvinyl chloride, polyethylene, polypropylene, polystyrene, poly- (4-methylpentene-1), polycarbonate, polyester, polyamide, polyethersulfone, polysulfone, acrylic, respectively. Resins and the like can be mentioned, and one or more of these can be used in combination.

  The proximal end of the discharge tube 4 is fixed to the lid 32, and the distal end is introduced to a position where the bone prosthetic material F is to be supplemented. The bone prosthetic material is discharged from the distal end.

  Examples of the constituent material of the discharge pipe 4 include stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, and the like. Moreover, the resin mentioned above as a constituent material of the outer cylinder and the plunger may be used.

  The length of the discharge pipe 4 is not particularly limited, but is preferably about 30 mm to 140 mm, more preferably about 60 mm to 100 mm.

Further, as will be described in detail later, it is necessary for the discharge tube 4 to discharge the bone grafting material F from the distal end portion in a state where the guide wire 2 is inserted. Therefore, when the cross-sectional area of the guide wire 2 is Z [mm ² ] and the cross-sectional area of the lumen of the discharge tube 4 is W [mm ² ], W / Z is about 1.5 or more and 200 or less. Is preferable, and it is more preferably about 4 or more and 100 or less. By setting W / Z in the above range, the bone grafting material F can be smoothly discharged even when the guide wire 2 is inserted into the discharge pipe 4.

Specific values of the cross-sectional area of the lumen of the discharge pipe 4 is not particularly limited, it is preferably on the order 3 mm ² or more 200 mm ² or less, and more preferably the degree 10 mm ² or more 100 mm ² or less. With the discharge pipe 4 having such a size, the generally used guide wire 2 can be inserted without difficulty, and the bone grafting material F can be discharged smoothly.

  A gasket 5 made of an elastic material is accommodated in the outer cylinder 3. The gasket 5 slides along the axial direction (longitudinal direction) of the outer cylinder 3 by the operation of the plunger 6.

  Examples of the constituent material (elastic material) of the gasket 5 include natural rubber, butyl rubber, isoprene rubber, butadiene rubber, rubber material such as styrene-butadiene rubber, thermoplastic elastomer, or a mixture thereof.

  A coating layer may be formed on the outer periphery of the gasket 5. Examples of the constituent material of the coating layer include polytetrafluoroethylene, an ethylene-tetrafluoroethylene copolymer, and a fluorine-based resin such as ethylene tetrafluoride. Thereby, the slidability with respect to the outer cylinder 3 of the gasket 5 improves.

  Although not shown in the drawings, the gasket 5 has a hollow portion, and the head portion of the plunger 6 is fitted into the hollow portion, whereby the plunger 6 is connected to the gasket 5.

  The plunger 6 includes a long plunger body 61 and a plate-like flange 62 integrally formed on the outer periphery of the proximal end of the plunger body 61. The plunger 6 can be operated by placing a finger or the like on the flange 62.

  The plunger 6 (plunger body 61) includes a through hole 60 formed along the axial direction thereof. In the present embodiment, as shown in FIG. 3, the syringe 1 is used in a state where the guide wire 2 is inserted through the through hole 60 and the discharge pipe 4.

When the cross-sectional area of the plunger body 61 is X [mm ² ] and the cross-sectional area of the through hole 60 is Y [mm ² ], X / Y is preferably about 3 or more and 200 or less, and about 4 or more and 100 or less. It is more preferable that By setting X / Y in the above range, it is possible to secure a through-hole 60 having a size sufficient for inserting the guide wire 2 while preventing the mechanical strength of the plunger main body 61 from being lowered.

  Here, the “cross section” refers to a surface or region perpendicular to the axial direction (longitudinal direction) of the member or space, and the “cross-sectional area” refers to the size of the surface or region.

Further, when the cross-sectional area of the through hole 60 is Y [mm ² ] and the cross-sectional area of the guide wire 2 is Z [mm ² ], it is preferable that Y / Z is about 1.1 or more and 200 or less. More preferably, it is about 5 or more and 100 or less. By setting Y / Z in the above range, the guide wire 2 can be smoothly inserted into the through hole 60.

Specific values of the cross-sectional area of the through-hole 60 is not particularly limited, it is preferably on the order 2 mm ² or more 200 mm ² or less, and more preferably of the order 10 mm ² or more 120 mm ² or less. If it is the through-hole 60 of such a size, the guide wire 2 generally used can be penetrated without difficulty.

  Moreover, the shape of the cross section of the through-hole 60 is not specifically limited, For example, circular shape, elliptical shape, triangular shape, quadrangular shape, pentagonal shape, polygonal shape like hexagonal shape, unusual shape like star shape, etc. Any shape may be used.

  In the present embodiment, the central axis of the through hole 60 substantially coincides with the central axis of the discharge pipe 4, and the central axis of the discharge pipe 4 substantially coincides with the central axis of the outer cylinder 3. With this configuration, since the through hole 60, the discharge pipe 4 and the outer cylinder 3 are concentrically arranged, the guide wire 2 can be easily and quickly inserted through the through hole 60 and the discharge pipe 4.

  In such a syringe 1, as shown in FIGS. 3 and 4, with the guide wire 2 inserted through the discharge pipe 4, the plunger 6 is operated to move the gasket 5 toward the distal end, thereby The volume of the internal space of the cylinder 3 is reduced. Thereby, the bone grafting material F passes through the space between the discharge pipe 4 and the guide wire 2 and is discharged from the tip of the discharge pipe 4.

For this reason, it is preferable that the bone grafting material F has sufficient fluidity (sufficiently low viscosity). Specifically, the viscosity of the bone grafting material F is preferably about 10 ⁵ mPa · s to 10 ⁹ mPa · s, and more preferably about 10 ⁶ mPa · s to 10 ⁸ mPa · s. preferable. With the bone grafting material F having such a viscosity, the narrow space between the discharge tube 4 and the guide wire 2 can be smoothly passed.

  Further, when the guide wire 2 is inserted into the discharge pipe 4 and the through hole 60, the guide wire 2 is pierced through the center of the tip of the gasket 5. For this reason, a hole through which the guide wire 2 passes may or may not be formed in the center of the tip of the gasket 5 in advance.

  In the former case, the cross-sectional area of the hole to be formed is set smaller than the cross-sectional area of the guide wire 2. On the other hand, in the latter case, the guide wire 2 pierces the gasket 5 to form a hole at the center of the tip of the gasket 5.

  Since the gasket 5 is made of an elastic material as described above, in any of the above cases, the gasket 5 is in close contact with the outer surface of the pierced guide wire 2 to ensure liquid tightness. For this reason, even if the plunger 6 is operated from the state shown in FIG. 3 and the gasket 5 is moved in the distal direction, the bone filling material F is prevented from entering (reversely flowing) the through-hole 60.

<< Screw >>
A screw 10 (insertion tool) is also used together with the syringe 1 as described above. As shown in FIG. 5A, the screw 10 includes a screw main body 11 having a U-shaped head when viewed from the front, and a locking cap 12 attached to the head of the screw main body 11 by screwing. ing. Further, a through hole 111 is formed in the screw body 11 along the axial direction. The cross-sectional area of the through hole 111 can also be set similarly to the cross-sectional area of the through hole 60.

  In such a screw 10, as shown in FIG. 5 (b), the rod 20 is positioned inside the head, the locking cap 12 is screwed into the head, and tightened to fix the rod 20 to the screw 10. can do.

  Examples of the constituent material of the screw 10 and the rod 20 include various metal materials such as titanium or titanium alloy and stainless steel, and various bioceramics such as hydroxyapatite.

<Back spinal fusion>
Next, an example of how to use the treatment set, that is, posterior spinal fusion using the treatment set will be described.

  [1] First, a paste-like bone filling material F is prepared by mixing with a cement powder and a hardening liquid. This operation can be performed by kneading using a cement powder, a hardening liquid, and a predetermined mortar set. Instead, this operation is performed by removing the lid 32 from the main body 31, supplying cement powder into the main body 31, and connecting another syringe containing the hardening liquid and the main body 31 to maintain this state. On the other hand, the curable liquid can be supplied from another syringe into the main body 31, and the mixture can be kneaded by reciprocating the mixture several times in the main syringe 31 and another syringe.

  [2] Next, in the former case, after removing the lid 32 from the main body 31 and supplying the bone grafting material F into the main body 31, the lid 32 is attached to the main body 31 by screwing. In the latter case, after removing another syringe from the main body 31, a lid 32 is attached to the main body 31 by screwing. In this way, as shown in FIG. 2, the syringe 1 in a state where the bone grafting material F is housed in the outer cylinder 3 is prepared.

  [3] Next, a predetermined position on the patient's back is opened with a scalpel to expose the vertebra 9 to be treated. Then, the part which is pressing the nerve of the vertebra 9 is removed. Further, the transverse process of the vertebral arch 92 and a part of the surface of the facet joint are removed. Thereby, the attachment of the bone prosthetic material F to the vertebra 9 is good, and the screw 10 can be easily attached to the vertebral arch 92.

  [4] Next, under X-ray or the like, the probe 30 (treatment tool) is punctured toward the vertebral body 91 as shown in FIG. . Thereby, pilot holes 93 (defects) are formed on the left and right sides of the vertebra 9 from the vertebral arch 92 toward the vertebral body 91. The prepared hole 93 may or may not reach the cancellous bone in the vertebral body 91.

  [5] Next, as shown in FIG. 7, the distal end portion of the guide wire 2 is inserted into the prepared hole 93. Thereafter, while maintaining this state, the guide wire 2 is inserted from the proximal end into the discharge tube 4, and the syringe 1 is advanced toward the vertebra 9 along the guide wire 2. Thereby, the syringe 1 is guided by the guide wire 2, and the front end side of the discharge tube 4 is inserted into the prepared hole 93 as shown in FIG. At this time, as shown in FIG. 3, the guide wire 2 is inserted through the through hole 60 after being pierced through the gasket 5.

  [6] Next, as shown in FIG. 4, by operating the plunger 6, the gasket 5 is moved in the distal direction, and the bone grafting material F is discharged from the distal end portion of the discharge pipe 4. As a result, the bone filling material F is injected (filled) into the vertebral body 91 and the prepared hole 93.

  At this time, since the lid 32 is screwed into the main body 31, even if the pressing force applied to the plunger 6 (that is, the pressure applied to the bone filling material F in the outer cylinder 3) is large, from the main body 31. It is difficult to leave. For this reason, the bone filling material F can be reliably injected into the vertebral body 91 and the prepared hole 93. Thereafter, as shown in FIG. 9, the syringe 1 is removed while leaving the guide wire 2.

  [7] Next, the guide wire 2 left in the through hole 111 of the screw body 11 is inserted, and the screw body 11 is advanced toward the vertebra 9 along the guide wire 2. Thereby, the screw main body 11 is guided by the guide wire 2, and the screw portion is inserted into the prepared hole 93. Then, the screw main body 11 is fixed to the vertebra 9 as shown in FIG. 10 by rotating the screw main body 11 using a jig (not shown).

  [8] Next, with the screw body 11 left, the guide wire 2 is removed as shown in FIG.

  The above steps [3] to [8] are performed on the upper and lower (plural) vertebrae 9 pressing the nerve.

  [9] Next, as shown in FIG. 12, the rod 20 is disposed so as to straddle the screw body 11 fixed to the prepared hole 93 of the vertebra 9 positioned vertically. Thereafter, the rod 20 is fixed to the screw 10 by attaching the locking cap 12 to the head of each screw body 11 by screwing and then tightening. As a result, the upper and lower vertebrae 9 are fixed with their separation distance maintained at an appropriate size. As a result, the stability of the spine is ensured with the nerve compression removed.

  [10] Next, an autologous bone or an artificial bone is placed at a position where a part of the transverse process and the facet joint is removed. Thereby, the upper and lower vertebrae 9 can be more firmly fixed, and the stability of the spine can be more reliably ensured. In addition, you may make it abbreviate | omit arrangement | positioning to the spine of an autologous bone or an artificial bone.

  Then, after the posterior spinal fusion is completed, the surgical site (incision) is sutured, ligated, etc., and the operation is completed.

  According to the procedure as described above, in order to advance the syringe 1 and the screw main body 11 toward the vertebra 9 along the guide wire 2, the discharge tube 4 of the syringe 1 and the screw portion of the screw main body 11 are placed in the pilot hole 93. Can be inserted quickly and reliably. As a result, it is possible to more easily inject (fill) the bone filling material F into the vertebral body 91 and the prepared hole 93 and to fix the screw body 11 to the vertebra 9 (vertebral arch 92).

  Further, the bone grafting material F is interposed between the vertebra 9 and the screw portion of the screw body 11 in the prepared hole 93 and functions as a scaffold for the screw body 11. Thereby, the screw main body 11 is fixed to the vertebra 9 with sufficient fixing strength.

  Furthermore, according to such a procedure using the guide wire 2, the syringe 1, and the screw 10, the incised portion of the patient's back can be made extremely small. For this reason, it is possible to perform a reliable and safe operation (back spinal fusion) while reducing the burden on the patient.

  As mentioned above, although the syringe and treatment set of this invention were demonstrated based on embodiment of illustration, this invention is not limited to this. For example, in the syringe and treatment set of the present invention, the configuration of each part can be replaced with an arbitrary configuration that can exhibit the same function, and an arbitrary configuration can be added.

  In addition, the syringe and treatment set of the present invention are not limited to posterior spine fixation, repair of bone defects of long bones such as the vertebral body and femur, and repair and fixation assistance for fractured portions that require reduction. It can be used to fix the artificial material to the bone, and to fill the gap between the artificial joint and the bone matrix with the bone prosthetic material. The syringe of the present invention is particularly suitable for use in vertebral body compression fracture procedures. Since conventional syringes could not be guided with a guide wire, it was necessary to expose the vertebral body greatly in order to secure a visual field, and the incision portion of the back was inevitably enlarged. However, since the syringe of the present invention can be guided by the guide wire and approach the vertebral body, the incision portion can be very small.

  In addition, a nail or the like may be used in the operation of the trochanteric fracture of the femur. In this case, since the syringe guides with a guide wire through a mounting device for fixing the nail or the like, the longer the discharge tube, Good. Specifically, the length of the discharge pipe is preferably set to about 100 mm to 600 mm, more preferably about 300 mm to 450 mm.

  Moreover, the elongate member (elongate member which the treatment set of this invention has) used with the syringe of this invention is not restricted to a guide wire, For example, a hollow member like a catheter may be sufficient. Furthermore, the insertion tool used with the syringe of the present invention is not limited to a screw, and may be a plug body such as a bone plug, for example. In addition, the syringe of this invention can also be used independently.

  Furthermore, the object which can use the syringe and treatment set of this invention is not restricted to a bone | frame, For example, an electronic component, a building component, etc. may be sufficient. This is especially useful for injecting fluid (eg, adhesives, sealants, cleaning fluids, etc.) into the defect parts of objects that are located inside living organisms, electronic devices and buildings and are difficult to visually check from outside. The syringe and treatment set of the invention are preferably used.

  Further, the fluid that can be used in the syringe and treatment set of the present invention is not limited to a paste form (gel form), and may be a liquid form, a granule form, a powder form, or the like.

DESCRIPTION OF SYMBOLS 1 Syringe 2 Guide wire 3 Outer cylinder 31 Main body 311 Thread 312 Flange 32 Cover body 321 Thread groove 322 Connection part 4 Discharge pipe 5 Gasket 6 Plunger 60 Through-hole 61 Plunger main body 62 Flange 9 Vertebral 91 Vertebral body 92 Vertebral arch 93 Lower hole DESCRIPTION OF SYMBOLS 10 Screw 11 Screw main body 111 Through-hole 12 Locking cap 20 Rod 30 Probe F Bone filling material

Claims (14)

An outer cylinder capable of storing fluid;
A discharge port protruding from the tip of the outer cylinder and discharging the fluid;
A gasket slidably provided in the outer cylinder;
A syringe comprising a through-hole formed along an axial direction and having a plunger for moving the gasket within the outer cylinder.   The syringe according to claim 1, wherein a central axis of the through hole and a central axis of the discharge port substantially coincide with each other.   The syringe according to claim 1 or 2, wherein a central axis of the discharge port and a central axis of the outer cylinder substantially coincide with each other. The plunger includes a long plunger body,
4. The X / Y is 3 or more and 200 or less, where X [mm ² ] is the cross-sectional area of the plunger body and Y [mm ² ] is the cross-sectional area of the through hole. The syringe according to 1.   The syringe according to any one of claims 1 to 4, wherein the outer cylinder includes a cylindrical main body and a lid body that is attached to a distal end portion of the main body by screwing and to which the discharge port is connected.   The syringe according to any one of claims 1 to 5, wherein the syringe is used in a state where a long member is inserted through the through hole and the discharge port.   The said gasket will be in the state pierced by the said elongate member when the said elongate member is penetrated to the said through-hole and the said discharge port, In this state, it adheres to the outer surface of the said elongate member. The syringe described. The Y / Z is 1.1 or more and 200 or less when the transverse area of the through hole is Y [mm ² ] and the transverse area of the long member is Z [mm ² ]. Syringe. The W / Z is 1.5 or more and 200 or less, where Z [mm ² ] is the cross-sectional area of the long member and W [mm ² ] is the cross-sectional area of the lumen portion of the discharge port. The syringe of any one of thru | or 8.   The syringe according to any one of claims 6 to 9, wherein the elongate member is a guide wire. A treatment set used to inject fluid into a defect in an object,
A syringe according to any one of claims 1 to 10,
A treatment set comprising: an elongated member that is inserted through the through hole and the discharge port and guides the discharge port of the syringe to the defect portion or the vicinity thereof.   The treatment set according to claim 11, further comprising a through-hole through which the elongated member can be inserted, and an insertion tool inserted into the defect portion.   The treatment set according to claim 11 or 12, wherein the elongated member is a guide wire. The treatment set according to any one of claims 11 to 13, wherein the fluid has a viscosity of 10 ⁵ mPa · s to 10 ⁹ mPa · s.

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