JP2018121965A - Osteosynthesis pin insertion jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an osteosynthesis pin insertion jig capable of reliably and simply performing osteosynthesis.SOLUTION: The osteosynthesis pin insertion jig includes: a hollow part penetrating from a tip end to a rear end of a cylindrical body 3 and in which a pin can be inserted; a first opening 11 provided at the tip end; a second opening 13 provided at the rear end; and a third opening 15 provided at a lateral face of the cylindrical body. The first opening constitutes a bone-chip suction hole, the second opening and the third opening constitute respectively a bone-chip suction adjustment hole and a suction hole, or a suction hole and a bone-chip suction adjustment hole.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an osteosynthesis pin insertion jig capable of reliably and simply performing osteosynthesis.

  Conventionally, as an instrument used for medical procedures such as osteotomy and osteosynthesis, for example, (1) forceps for grasping a bone fragment, (2) an elongated cylindrical instrument for sucking bone waste or sucking and holding a bone fragment And (3) there are elongated cylindrical instruments for drilling and pin insertion. When bones that were originally integral were crushed into large bone fragments and small bone fragments due to fractures, etc., using these, the small bone fragments were abutted and positioned while fixing the large bone fragments, Are joined by pins.

  In addition, for the purpose of aspirating bone debris generated by osteotomy or the like, a medical instrument has been proposed in which a suction tube is provided at the tip of a drill for drilling, and the bone debris generated during drilling is aspirated. The configuration is complicated and not convenient (for example, see Patent Document 1).

Special table 2009-5341-55 gazette

  However, when using the above-mentioned forceps and instruments, space is required due to the structure, and in addition to difficult positioning, bone fragments are gripped, bone waste is sucked, and drilling / pin insertion is performed separately. There is a problem that it must be carried out with a tool and takes time and effort.

  In addition, although using the medical instrument of the said patent document 1 is also considered, this is an instrument specialized only for bone drilling | boring, Comprising: It cannot necessarily apply to osteosynthesis, The said subject There is much room for improvement in terms of solving.

  Accordingly, an object of the present invention is a bone having a simple structure that does not require a space, can be delicately positioned, and is capable of grasping bone fragments (positioning), sucking bone waste, and drilling and inserting pins. It is to provide a joining pin insertion jig.

(1)
In order to solve the above problems, the present invention provides:
A hollow part capable of inserting a pin communicating from the front end to the rear end of the cylindrical body;
A first opening provided at the tip;
A second opening provided at the rear end;
A third opening provided on a side surface of the cylindrical body;
Comprising
The first opening constitutes a bone fragment suction port,
The second opening and the third opening constitute a bone fragment suction adjustment port and a suction port, respectively, or a suction port and a bone fragment suction adjustment port;
A jig for inserting an osteosynthesis pin is provided.

In the osteosynthesis pin insertion jig of the present invention having such a configuration, the front end from the rear end is used while using the first opening at the front end and the second opening at the rear end leading to the hollow portion as a guide. A drilling tool and a pin can be inserted.
Further, the hollow portion is branched into, for example, a T-shape by the third opening connected substantially vertically to the linear hollow portion communicating from the first opening to the second opening. By performing suction from either the second opening at the end or the third opening at the side and closing the other, the first opening has a suction force, and the bone fragments can be adsorbed. Since the tip of the cylinder has a thin rod shape, it is possible to easily perform treatment or delicate positioning in a limited space.

(2)
Moreover, in the above-described jig for inserting an osteosynthesis pin of the present invention,
Comprising a reduced diameter portion provided in the vicinity of the rear end;
It is desirable to feature.

  In the osteosynthesis pin insertion jig of the present invention having such a configuration, a substantially cylindrical reduced diameter portion is connected to the second opening at the rear end of the cylindrical body or the third opening at the side surface, and separately prepared. An air line (suction pipe) provided in the intake module can be easily connected.

(3)
Moreover, in the above-described jig for inserting an osteosynthesis pin of the present invention,
The cylinder is transparent, or the cylinder has a transparent window;
It is desirable to feature.

  In the osteosynthesis pin insertion jig of the present invention having such a configuration, the practitioner can visually check the pin inserted into the hollow portion, and a more reliable treatment can be performed.

(4)
Furthermore, comprising the osteosynthesis pin insertion jig according to any one of the above (1) to (3), and a pin pusher,
A jig set for inserting an osteosynthesis pin characterized by the above is provided.

  With the osteosynthesis pin insertion jig set of the present invention having such a configuration, the pin inserted into the hollow portion can be pressed with a pin pusher, and the treatment can be performed more easily.

It is a top view explaining the outline | summary of the jig | tool 1 for osteosynthesis pin insertion in this embodiment. It is a top view which shows the structure of the cylinder 3 shown in FIG. FIG. 3A is a side view showing the front end of the cylindrical body 3, and FIG. 3B is a side view showing the rear end of the cylindrical body 3. FIG. FIG. 3C is a side view showing the end of the reduced diameter portion 5. It is sectional drawing which shows the internal structure of the cylinder 3 shown in FIG. It is a top view which shows the structure of the pin pusher 17 shown in FIG. FIG. 6A is a diagram illustrating a positioning process of a bone fragment 103 using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 6A is a schematic diagram illustrating grasping of the bone fragment 103 by suction. FIG. 6B is a schematic diagram showing a state in which the bone piece 103 is positioned at a predetermined joining position. FIG. 7A is a diagram showing a drilling process using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 7A is a schematic diagram showing a state in which a bone 101 and a bone fragment 103 are drilled. 7 (b) is a schematic diagram showing a procedure for removing the punching tool 21 from the hollow portion 9. FIG. 8A is a diagram showing a joining process using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 8A is a schematic diagram showing a procedure for inserting the pin 23 into the hollow portion 9. FIG. 8B is a schematic diagram showing a procedure for inserting the pin 23 into the bonding hole 105 using the pin pusher 17. It is a schematic diagram which shows the completion | finish procedure of the treatment using the osteosynthesis pin insertion jig | tool 1 of this embodiment. It is sectional drawing which shows the structure of the jig | tool 201 for osteosynthesis pin insertion used as a modification.

  Hereinafter, typical embodiments of the osteosynthesis pin insertion jig 1 according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to what is shown in the drawings, and each drawing is for conceptual description of the present invention. Therefore, the dimensions, ratios, or numbers are exaggerated as necessary for easy understanding. Or it may be expressed in a simplified manner. Further, in the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted.

1. Outline of Osteotomy Pin Insertion Jig 1 An outline of the osteosynthesis pin insertion jig 1 of the present embodiment will be described with reference to FIG. FIG. 1 is a plan view for explaining the outline of the osteosynthesis pin insertion jig 1 according to the present embodiment.

  The osteosynthesis pin insertion jig 1 of this embodiment is composed of a cylindrical body 3 and a pin pusher 17, and is used for bone treatment such as osteosynthesis, bone transplantation, and osteotomy. Thus, a series of treatment steps in drilling, positioning, and joining can be performed accurately and further simplified.

2. Next, the structure of the cylinder 3 will be described in detail with reference to FIGS. 2 and 3A, 3B, and 3C. FIG. 2 is a plan view showing the structure of the cylindrical body 3, and FIGS. 3A, 3B, and 3C are diagrams for explaining the front end and the rear end of the cylindrical body 3, and FIG. FIG. 3B is a side view showing the rear end of the cylindrical body 3, and FIG. 3C is a side view showing the end of the reduced diameter portion 5. .

  As shown in FIG. 1, the cylindrical body 3 is generally composed of a gripping portion 3 </ b> A gripped by the practitioner and a hollow rod-shaped portion 3 </ b> B inserted into the bone, and both are linearly arranged to increase rigidity. (Hereinafter, in this embodiment, the connection position between the gripping portion 3A and the rod-shaped portion 3B is used as a base point, the end of the rod-shaped portion 3B located far from the base point is the "tip", and the end of the gripping portion 3A is This will be referred to as “rear end”). Further, a substantially cylindrical reduced diameter portion 5 is connected to the side surface of the gripping portion 3A, and a connecting portion 7 that supports the rod-like portion 3B is provided at the end on the distal end side.

<Grip part 3A>
The gripping part 3A is a part to be gripped when a practitioner such as a doctor or a medical worker operates the cylindrical body 3. In this embodiment, as shown in FIG. And a waist portion 31 disposed in the middle of the raised portion 29, and a first intake passage 33 communicating with both end portions and a side surface from the first intake passage 33. And a third intake passage 37 that branches in communication with the first intake passage 37.

  Further, as described above, the substantially cylindrical diameter-reduced portion 5 having the diameter-reduced portion intake passage 39 communicating with both ends is connected to the side surface of the end portion (the rod-shaped portion 3B side) of the grip portion 3A. ing. The diameter-reduced portion 5 is formed of a resin such as polycarbonate, for example, and is connected to an air line 27 provided in an intake module (not shown) separately prepared at the time of treatment, and passes through a third intake passage 37. It is used for sucking air in the hollow portion 9 inside the cylindrical body 3.

  In addition, it is preferable that 3 A of holding parts are formed with stainless steel, such as SUS304 provided with corrosion resistance. Moreover, it does not necessarily need to be the uneven | corrugated shape provided with the protruding part 29 and the waist part 31, and what is necessary is just to employ | adopt suitably the structure where a practitioner is easy to operate.

  As described above, the reduced diameter portion 5 is preferably configured as a part physically different from the gripping portion 3 </ b> A, but may be integrally formed as a part of the reduced diameter portion 5. However, in this case, it is preferable to form with the same material (stainless steel or the like) as the grip portion 3A.

  The connection portion 7 provided at the end (the rod-like portion 3B side) of the grip portion 3A is a substantially cylindrical part formed transparently using a resin such as polycarbonate, and one end portion is the grip portion 3A. Is connected to the other end (the bar-shaped part 3B side), and the other is connected to the bar-shaped part 3B. The size of the connecting portion 7 is desirably formed with a predetermined dimension according to the diameter and length of the rod-like portion 3B.

<Bar-shaped part 3B>
The rod-shaped portion 3B is a hollow part formed transparently using a resin such as polycarbonate, and includes a second intake passage 35 that communicates both ends inside. As described above, one end portion of the rod-like portion 3B is connected to the connecting portion 7, and the other end portion is reduced in diameter from a predetermined position toward the tip, so that the delicate work during the treatment can be performed. It has a suitable shape.

  In addition, it is desirable to form the size of the rod-shaped portion 3B at a ratio of a diameter and a length that does not cause bending. Further, a plurality of sizes may be developed, and selection and use may be possible according to the treatment content.

  Here, in order to facilitate the following description, the opening on the rear end side leading to the first intake passage 33 is the second opening 13, the side opening leading to the third intake passage 37 is the third opening 15, and the second intake passage. An opening on the front end side leading to 35 is defined as a first opening 11 (see FIGS. 3A, 3B, and 3C).

<Hollow part 9>
Next, the internal structure of the cylinder 3 will be described in detail with reference to FIG. FIG. 4 is a cross-sectional view showing the internal structure of the cylinder 3. As shown in FIG. 4, the hollow portion 9 inside the cylindrical body 3 includes a first intake passage 33, a second intake passage 35, a third intake passage 37, and a reduced diameter portion intake passage 39. Yes.

  The configuration of the hollow portion 9 will be described more specifically. The first intake passage 33 and the third intake passage 37 are branched in a substantially vertical manner inside the grip portion 3A. The second intake passage 35 inside the rod-like portion 3B communicates linearly. Further, the reduced diameter portion intake passage 39 inside the reduced diameter portion 5 connected to the side surface of the gripping portion 3 </ b> A communicates with the third intake passage 37.

  The diameter of the second intake passage 35 is preferably formed to be equal to or larger than the diameter of the first intake passage 33. Thereby, the punching tool 21 and the pin 23 inserted from the rear end side during the treatment are not caught at the communication position between the first intake passage 33 and the second intake passage 35, and the rear end side is smoothly formed. Can be inserted from the tip to the tip side.

3. Next, the structure of the pin pusher 17 will be described with reference to FIG. FIG. 5 is a plan view showing the structure of the pin pusher 17. The pin pusher 17 is composed of a head portion 17A and a pressing rod 17B. When the bone is joined, the pressing rod 17B is inserted into the hollow portion 9 from the rear end side of the cylinder 3 to fix the pin 23. It is to assist.

  The head portion 17A has a substantially hemispherical shape and is formed so that the practitioner can hold it using a plurality of fingers. The pressing rod 17B is a straight rod and has a predetermined length and diameter (hollow). The first intake passage 33 and the second intake passage 35 constituting the portion 9 are smaller in size than the diameter). The head portion 17 </ b> A is for the practitioner to operate the pin pusher 17, but also serves to prevent the pressing rod 17 </ b> B from being excessively inserted into the distal end side of the cylindrical body 3.

4). Method of Treatment Using Osteosynthesis Pin Inserting Jig 1 Hereinafter, the procedure of osteosynthesis using the osteosynthesis pin insertion jig 1 of the present embodiment will be described. In this osteosynthesis, the bone 101 and the bone fragment 103 separated from the bone 101 are joined.

<Positioning process>
First, the procedure for positioning the bone fragment 103 at a predetermined joining position will be described with reference to FIGS. 6 (a) and 6 (b). FIGS. 6A and 6B are diagrams showing a positioning process of the bone fragment 103 using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 6A is a bone fragment by suction. FIG. 6B is a schematic diagram showing how the bone piece 103 is positioned at a predetermined joining position.

  As shown in FIG. 6A, first, the practitioner connects the air line 27 provided in the intake module separately prepared to the third opening 15, and performs suction from the third opening 15 to the intake module side. Air in the hollow portion 9 provided inside the cylindrical body 3 is sucked through the third opening 15, and external air is taken into the hollow portion 9 from the first opening 11 and the second opening 13.

  The practitioner grasps the grasping portion 3A of the cylindrical body 3, further brings the thumb of the grasped hand into contact with the second opening 13, and closes the second opening 13. As a result, external air is taken into the hollow portion 9 only from the first opening 11. After setting the air flow in the hollow portion 9 to the above state, the practitioner brings the distal end side of the rod-shaped portion 3 </ b> B close to the bone piece 103 and brings the first opening 11 into contact with the surface of the bone piece 103. The bone fragment 103 is adsorbed to the first opening 11 by the negative pressure of air.

  Subsequently, as shown in FIG. 6 (b), the practitioner operates the cylinder 3 while maintaining the closed state of the second opening 13, and moves the bone piece 103 to an appropriate joint position with the bone 101 for positioning. I do. Unlike the technique in which the bone piece 103 is directly gripped and moved by the hand, the bone piece 103 can be moved to a more accurate joining position because it is held at the tip of the rod-shaped portion 3B, and is superior in terms of hygiene. It has sex.

<Punching process>
Next, a drilling procedure for providing joint holes in both the bone 101 and the bone fragment 103 will be described with reference to FIGS. FIGS. 7A and 7B are diagrams showing a drilling process using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 7A is a drilling through the bone 101 and the bone fragment 103. FIG. 7B is a schematic diagram showing a procedure for removing the punching tool 21 from the hollow portion 9.

  As shown in FIG. 7A, the practitioner abuts against the second opening 13 after pressing the cylindrical body 3 substantially vertically against the bone piece 103 so as not to move the bone piece 103 positioned in the positioning step. Release the closed finger to release the closed state.

  Subsequently, a punch 21 for punching the bone 101 and the bone fragment 103 is prepared, and the punch 21 is inserted into the hollow portion 9 through the second opening 13. The practitioner operates the punching tool 21 from the rear end side of the cylindrical body 3 to provide a straight joining hole 105 in the bone 101 and the bone fragment 103.

  Next, as shown in FIG. 7B, the punch 21 inserted into the hollow portion 9 inside the cylinder 3 is slowly pulled out from the second opening 13. At the time of drilling, bone waste is generated from the bone 101 and the bone fragment 103, but is taken into the second intake passage 35 from the first opening 11 by suction by the intake module, and air is passed through the third intake passage 37 and the third opening 15. It can be moved to the line 27 side.

<Joint process>
Next, a procedure for joining the bone 101 and the bone fragment 103 will be described with reference to FIGS. 8A and 8B are views showing a joining process using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 8A shows that the pin 23 is inserted into the hollow portion 9. FIG. 8B is a schematic diagram showing a procedure for inserting the pin 23 into the bonding hole 105 using the pin pusher 17.

  The practitioner stops the suction of the intake module while maintaining the pressing of the cylinder 3 against the bone fragment 103, and further inserts the pin 23 into the hollow portion 9 from the second opening 13. Subsequently, the head 17 </ b> A of the pin pusher 17 is gripped using the hand opposite to the hand that grips the cylinder 3, and the pressing rod 17 </ b> B is inserted into the hollow portion 9 from the second opening 13. The butt of the pin 23 inserted previously is pushed and pushed to the distal end side by the pressing rod 17 and inserted into the joining hole 105 to join the bone 101 and the bone fragment 103.

  In the present embodiment, the joining process using the pin 23 having a smooth surface has been described. However, a thread pin having an uneven surface or a screw pin having a thread on the surface is used depending on the treatment content. You can also.

  In addition, when using a screw pin, although the process of providing a tap in the surface of the hole 105 for joining is required, it shall carry out similarly to a drilling process using a dedicated tap tool. Further, since the rod-like portion 3B and the joint portion 7 are transparent, it is possible to perform the work while visually observing, for example, when the pin 23 is inserted into the joint hole 105.

  Next, the final procedure of the treatment will be described with reference to FIG. FIG. 9 is a schematic diagram showing a procedure for ending the treatment using the osteosynthesis pin insertion jig 1 of the present embodiment. As shown in FIG. 9, the practitioner pulls the cylinder 3 upward and releases the contact between the tip of the rod-shaped portion 3 </ b> B and the bone piece 103. Subsequently, the joint state of the bone 101 and the bone fragment 103 is carefully checked by visual inspection or the like. If there is no problem, the treatment is completed.

5. Modified Example Next, a modified example of the present invention will be described with reference to FIG. FIG. 10 is a cross-sectional view showing the structure of the osteosynthesis pin insertion jig 201. In this modification, the structure of the cylinder 203 is not greatly changed, but the reduced diameter portion 205 is connected to the rear end side of the gripping portion 203A, and the connection position of the air line 27 during the treatment is not the side surface, It has the characteristic which becomes an end side.

  As a result, the practitioner closes the third opening 215 when making the hollow portion 209 negative pressure, and can perform the work more efficiently depending on the bone part to be joined and the content of the treatment. As for the treatment, only the negative pressure operation of the hollow portion 209 is different, and thus detailed description thereof is omitted.

  The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to these embodiments, and other embodiments may be used without departing from the spirit and teaching of the claims. There are improvements and modifications. Those skilled in the art will readily understand that all such improvements and modifications are included in the technical scope of the present invention.

  The jig 1 for inserting an osteosynthesis pin of the present invention is a jig used for bone treatment such as osteosynthesis, bone grafting, osteotomy, etc., and a series of treatments in drilling, positioning and joining. The process can be performed accurately and further simplified.

1 Osteotomy pin insertion jig
3 cylindrical body 3A gripping part 3B rod-like part 5 reduced diameter part 7 connecting part 9 hollow part 11 first opening 13 second opening 15 third opening 17 pin pusher 17A head part 17B pressing rod 21 punching tool 23 pin 27 air line (intake air) module)
29 Bumped portion 31 Waist portion 33 First intake passage 35 Second intake passage 37 Third intake passage 39 Reduced diameter portion intake passage 101 Bone 103 Bone piece 105 Joint hole 201 Bone joint pin insertion jig
203 cylinder 203A gripping part 203B rod-like part 205 reduced diameter part 207 connecting part 209 hollow part 211 first opening 213 second opening 215 third opening

Claims (4)

A hollow part capable of inserting a pin communicating from the front end to the rear end of the cylindrical body;
A first opening provided at the tip;
A second opening provided at the rear end;
A third opening provided on a side surface of the cylindrical body;
Comprising
The first opening constitutes a bone fragment suction port,
The second opening and the third opening constitute a bone fragment suction adjustment port and a suction port, respectively, or a suction port and a bone fragment suction adjustment port;
An osteosynthesis pin insertion jig characterized by the above. Comprising a reduced diameter portion provided in the vicinity of the rear end;
The osteosynthesis pin insertion jig according to claim 1, wherein: The cylinder is transparent, or the cylinder has a transparent window;
The osteosynthesis pin insertion jig according to claim 1 or 2. Comprising the osteosynthesis pin insertion jig according to any one of claims 1 to 3, and the pin pusher.
An osteosynthesis pin insertion jig set characterized by

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