JP6895759B2 - Jig for inserting osteosynthesis pin - Google Patents

Description

The present invention relates to a jig for inserting a bone joining pin that can reliably and easily perform a bone joining operation.

Conventionally, as an instrument used for medical treatment such as osteotomy and osteosynthesis, for example, (1) a forceps for grasping a bone fragment, (2) an elongated tubular instrument for sucking and gripping bone debris or a bone fragment. , And (3) there are elongated tubular instruments for drilling and pin insertion. When the originally integrated bone is crushed into a large bone fragment and a small bone fragment due to a fracture or the like, these are used to fix the large bone fragment and abut the small bone fragment to position it. Are joined by pins.

For the purpose of sucking bone debris generated by osteotomy or the like, a medical device has been proposed in which a suction tube is provided at the tip of a drill for perforation to suck the bone debris generated during perforation. , The configuration was complicated and not simple (see, for example, Patent Document 1).

Special Table 2009-5341-55

However, when using the above-mentioned forceps and instruments, space is required due to the structure, and in addition to the difficulty of delicate positioning, grasping of bone fragments, suction of bone debris, and perforation / pin insertion are different. There is a problem that it takes time and effort because it must be carried out with an instrument.

Although it is conceivable to use the medical device of Patent Document 1, this is a device specially configured only for perforation of bone and is not necessarily applicable to osteosynthesis, and the above-mentioned problem is solved. There is much room for improvement in terms of resolution.

Therefore, an object of the present invention is a bone having a simple structure that does not require space, enables delicate positioning, and enables bone fragment grasping (positioning), bone debris suction, and perforation / pin insertion. The purpose is to provide a jig for inserting a joining pin.

(1) In order to solve the above problems, the present invention
A hollow part into which an osteosynthesis pin can be inserted that communicates from the front end to the rear end of the cylinder,
The first opening provided at the tip and
With the second opening provided at the rear end,
The third opening provided on the side surface of the cylinder and
Equipped with
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, or a suction port and a bone fragment suction adjustment port, respectively.
Provided is a jig for inserting an osteosynthesis pin.

In the jig for inserting an osteosynthesis pin of the present invention having such a configuration, by using the first opening at the tip leading to the hollow portion and the second opening at the rear end, the cylinder is used as a guide and the tip is connected to the tip. A perforator and a pin can be inserted into the.
In addition, since the hollow portion is branched into a T-shape, for example, by the third opening that is connected substantially vertically to the linear hollow portion that communicates from the first opening to the second opening, the practitioner can post. By sucking from either the second opening at the end or the third opening at the side surface and closing the other, the first opening has a suction force and can adsorb bone fragments. Since the tip of the cylinder is a thin rod, it is possible to easily perform treatment and delicate positioning within a limited space.

(2) Further, in the above-mentioned jig for inserting the osteosynthesis pin of the present invention,
Provided with an air line connection provided in the vicinity of the rear end.
It is desirable to feature.

The jig for inserting the osteosynthesis pin of the present invention having such a configuration is prepared separately by connecting a substantially cylindrical air line connecting portion to the second opening at the rear end of the cylinder or the third opening on the side surface. The air line (suction pipe) provided in the intake module can be easily connected.

(3) Further, in the above-mentioned jig for inserting the osteosynthesis pin of the present invention,
The cylinder is transparent, or the cylinder is provided with a transparent window.
It is desirable to feature.

In the jig for inserting the osteosynthesis pin of the present invention having such a configuration, the practitioner can visually recognize the pin inserted in the hollow portion, and more reliable treatment can be performed.

(4) Further, the jig for inserting the osteosynthesis pin according to any one of (1) to (3) above and the pin pusher of the osteosynthesis pin are provided.
Provided is a jig set for inserting an osteosynthesis pin.

With the jig set for inserting the osteosynthesis pin of the present invention having such a configuration, the pin inserted in the hollow portion can be pressed by the pin pusher, and the treatment can be performed more easily.

It is a top view explaining the outline of the osteosynthesis pin insertion jig 1 in this embodiment. It is a top view which shows the structure of the cylinder 3 shown in FIG. 1A and 1B are views for explaining the front end and the rear end of the cylinder 3, FIG. 3A is a side view showing the front end of the cylinder 3, and FIG. 3B is a rear end of the cylinder 3. FIG. 3C is a side view showing an end portion of the air line connecting portion 5. It is sectional drawing which shows the internal structure of the cylinder body 3 shown in FIG. It is a top view which shows the structure of the pin pusher 17 shown in FIG. It is a figure which shows the positioning process of the bone fragment 103 using the jig 1 for inserting the osteosynthesis pin of this embodiment, and FIG. 6 (b) is a schematic view showing how the bone fragment 103 is positioned at a predetermined joint position. It is a figure which shows the drilling process using the jig 1 for inserting the osteosynthesis pin of this embodiment, and FIG. 7A is a schematic diagram which shows the state of drilling a bone 101 and a bone fragment 103. 7 (b) is a schematic view showing a procedure for removing the drilling tool 21 from the hollow portion 9. It is a figure which shows the joining process using the bone joining pin insertion jig 1 of this embodiment, and FIG. 8A is a schematic view which shows the procedure of inserting a pin 23 into a hollow part 9, and is FIG. 8 (b) is a schematic view showing a procedure for inserting the pin 23 into the joining hole 105 using the pin pusher 17. It is a schematic diagram which shows the completion procedure of the operation using the jig 1 for inserting the osteosynthesis pin of this embodiment. It is sectional drawing which shows the structure of the osteosynthesis pin insertion jig 201 which becomes a modification.

Hereinafter, a typical embodiment 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 those shown in the drawings, and each drawing is for conceptually explaining the present invention. Therefore, the dimensions, ratios or numbers are exaggerated as necessary for easy understanding. Alternatively, it may be abbreviated. Further, in the following description, the same or corresponding parts may be designated by the same reference numerals, and duplicate description may be omitted.

1. 1. Outline of the Osteojunction 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 illustrating an outline of the osteosynthesis pin insertion jig 1 in the present embodiment.

The jig 1 for inserting an osteosynthesis pin of the present embodiment is composed of a cylinder 3 and a pin pusher 17, and is a jig used for bone treatment such as osteosynthesis, bone grafting, and osteotomy. Therefore, a series of treatment steps in perforation, positioning, and joining can be performed accurately and further simplified.

2. Structure of each part in the tubular body 3 Next, the structure of the tubular body 3 will be described in detail with reference to FIGS. 2 and 3 (a), (b), and (c). 2A and 2B are plan views showing the structure of the tubular body 3, and FIGS. 3A, 3B, and 3C are views for explaining the front end and the rear end of the tubular body 3, and FIG. 3A is a diagram. 3 is a side view showing the tip of the cylinder 3, FIG. 3 (b) is a side view showing the rear end of the cylinder 3, and FIG. 3 (c) is a side view showing the end of the air line connecting portion 5. is there.

As shown in FIG. 1, the tubular body 3 is generally composed of a grip portion 3A gripped by the practitioner and a hollow rod-shaped portion 3B to be inserted into the bone, both of which are arranged linearly in order to increase rigidity. (Hereinafter, in the present embodiment, the connection position between the grip portion 3A and the rod-shaped portion 3B is used as a base point, the end portion of the rod-shaped portion 3B located far from the base point is the "tip", and the end portion of the grip portion 3A is used. It will be referred to as the "rear end"). Further, a substantially cylindrical air line connecting portion 5 is connected to the side surface of the grip portion 3A, and a connecting portion 7 for supporting the rod-shaped portion 3B is provided at the end portion on the tip end side.

<Grip part 3A>
The grip portion 3A is a portion to be gripped when a practitioner such as a doctor or a medical worker operates the tubular body 3, and in the embodiment, as shown in FIG. 1, two raised portions 2 are formed on the side surface. The waist portion 31 is arranged in the middle of the raised portion 29, and has a concavo-convex shape. Inside, a first intake passage 33 communicating with both ends and a side surface from the first intake passage 33. It is provided with a third intake passage 37, which is connected to and branches into the air.

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

The grip portion 3A is preferably made of stainless steel such as SUS304 having corrosion resistance. Further, it is not always necessary to have a concave-convex shape having a raised portion 29 and a waist portion 31, and a structure that is easy for the practitioner to perform the treatment may be appropriately adopted.

As described above, the air line connecting portion 5 is preferably configured as a physically separate component from the grip portion 3A , but may be integrally formed as a part of the grip portion 3A. However, in this case, it is preferable to use the same material (stainless steel or the like) as the grip portion 3A.

The connecting portion 7 provided at the end portion (rod-shaped 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 end portion (rod-shaped portion 3B side) of the rod-shaped portion 3B, and the rod-shaped portion 3B is connected to the other end portion. It is desirable that the size of the connecting portion 7 is formed to a predetermined size according to the diameter and length of the rod-shaped portion 3B.

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

It is desirable that the size of the rod-shaped portion 3B is formed by a ratio of diameter and length that does not cause bending to itself. In addition, a plurality of sizes may be developed so that they can be selectively used according to the treatment content.

Here, in order to facilitate the following explanation, the opening on the rear end side leading to the first intake passage 33 is the second opening 13, the opening on the side surface leading to the third intake passage 37 is the third opening 15, and the second intake passage. The opening on the tip side leading to 35 is referred to as the first opening 11 (see FIGS. 3 (a), (b), and (c)).

<Hollow part 9>
Next, the internal structure of the tubular body 3 will be described in detail with reference to FIG. FIG. 4 is a cross-sectional view showing the internal structure of the tubular body 3. As shown in FIG. 4, the hollow portion 9 inside the tubular body 3 is composed of a first intake passage 33, a second intake passage 35, a third intake passage 37, and an air line connection portion intake passage 39. ing.

More specifically, the configuration of the hollow portion 9 will be described. Inside the grip portion 3A, the first intake passage 33 and the third intake passage 37 are substantially vertically connected and branched, and the first intake passage 33 and the first intake passage 33. , And the second intake passage 35 inside the rod-shaped portion 3B are in linear communication with each other. Furthermore, the air line connection 5 inside the air line connection unit intake passage 39 connected to the side surface of the grip portion 3A is communicated with the third intake passage 37.

The diameter of the second intake passage 35 is preferably formed to be the same size or larger than the diameter of the first intake passage 33. As a result, the perforator 21 and the pin (bone junction pin) 23 inserted from the rear end side during the treatment do not get caught at the communication position between the first intake passage 33 and the second intake passage 35. It is possible to smoothly insert from the rear end side to the front end side.

3. 3. Structure of each part of the pin pusher 17 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, and when the bones are joined, the pressing rod 17B is inserted into the hollow portion 9 from the rear end side of the tubular body 3 to fix the pin 23. It is an aid.

The head portion 17A is substantially hemispherical and is formed so that the practitioner can grasp it with a plurality of fingers, and the pressing rod 17B has a linear rod shape and a predetermined length and diameter (hollow). It is formed by a dimension smaller than the diameter of the first intake passage 33 and the second intake passage 35 constituting the portion 9). The head portion 17A is for the practitioner to operate the pin pusher 17, but also has a role of preventing the pressing rod 17B from being over-inserted into the tip end side of the tubular body 3.

4. Treatment method using the osteosynthesis pin insertion jig 1 The procedure for osteosynthesis using the osteosynthesis pin insertion jig 1 of the present embodiment will be described below. In the osteosynthesis technique, the bone 101 and the bone fragment 103 separated from the bone 101 are joined.

<Positioning process>
First, a procedure for positioning the bone fragment 103 at a predetermined joint position will be described with reference to FIGS. 6A and 6B. 6 (a) and 6 (b) are views showing a step of positioning the bone fragment 103 using the jig 1 for inserting the osteosynthesis pin of the present embodiment, and FIG. 6 (a) is a view of the bone fragment by suction. FIG. 6B is a schematic view showing the gripping of the 103, and FIG. 6B is a schematic view showing how the bone fragment 103 is positioned at a predetermined joint 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 sucks from the third opening 15 to the intake module side. The air in the hollow portion 9 provided inside the tubular body 3 is sucked through the third opening 15, and the outside air is taken into the hollow portion 9 from the first opening 11 and the second opening 13.

The practitioner grips the grip portion 3A of the tubular body 3, further brings the thumb or the like of the gripped hand into contact with the second opening 13, and closes the second opening 13. As a result, the outside air is taken into the hollow portion 9 only from the first opening 11. After the air flow in the hollow portion 9 is brought into the above state, the practitioner brings the tip end side of the rod-shaped portion 3B closer to the bone fragment 103 and brings the first opening 11 into contact with the surface of the bone fragment 103. The bone fragment 103 is adsorbed on the first opening 11 by the negative pressure of air.

Subsequently, as shown in FIG. 6B, the practitioner operates the tubular body 3 while maintaining the closed state of the second opening 13, and moves the bone fragment 103 to an appropriate joint position with the bone 101 for positioning. I do. Unlike the method of directly grasping and moving the bone fragment 103 by hand, since the bone fragment 103 is gripped by the tip of the rod-shaped portion 3B, it is possible to move the bone fragment 103 to a more accurate joint position, which is also advantageous in terms of hygiene. 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. 7 (a) and 7 (b). 7 (a) and 7 (b) are views showing a perforation process using the osteosynthesis pin insertion jig 1 of the present embodiment, and FIG. 7 (a) is a perforation process in the bone 101 and the bone fragment 103. 7 (b) is a schematic view showing a procedure for removing the drilling tool 21 from the hollow portion 9.

As shown in FIG. 7A, the practitioner presses the tubular body 3 substantially vertically against the bone fragment 103 so as not to move the bone fragment 103 positioned in the positioning step, and then contacts the second opening 13. Release the finger to release the closed state.

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

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

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

The practitioner stops the suction of the intake module while maintaining the pressure of the tubular body 3 against the bone fragment 103, and further inserts the pin 23 into the hollow portion 9 through the second opening 13. Subsequently, the head portion 17A of the pin pusher 17 is gripped by the hand opposite to the hand that grips the tubular body 3, and the pressing rod 17B is inserted into the hollow portion 9 through the second opening 13. The bottom of the pin 23 inserted earlier is pushed out by pressing it toward the tip side with 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, but a thread pin having an uneven surface, a screw pin having a screw thread on the surface, or the like may be used depending on the treatment content. You can also.

When a screw pin is used, a step of providing a tap on the surface of the joining hole 105 is required, but it is performed in substantially the same manner as the drilling step using a dedicated tap tool. Further, since the rod-shaped portion 3B and the joint portion 7 are transparent, it is possible to perform the work while visually observing, for example, when inserting the pin 23 into the joint hole 105.

Next, the final procedure of the treatment will be described with reference to FIG. FIG. 9 is a schematic view showing a procedure for completing the treatment using the osteosynthesis pin insertion jig 1 of the present embodiment. As shown in FIG. 9, the practitioner pulls up the tubular body 3 to release the contact between the tip of the rod-shaped portion 3B and the bone fragment 103. Subsequently, the joint state of the bone 101 and the bone fragment 103 is carefully confirmed by visual inspection or the like, and if there is no problem, the treatment is completed.

5. Modification Example Next, a modification 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 the modified example, the structure of the tubular body 203 is not significantly changed, but the air line connecting portion 205 is connected to the rear end side of the grip portion 203A, and the connecting position of the air line 27 during the treatment is not the side surface side. It has the characteristic of being on the rear end side.

As a result, the practitioner closes the third opening 215 when the hollow portion 209 is subjected to negative pressure, and the work can be performed more efficiently depending on the part of the bone to be joined and the content of the treatment. Regarding the treatment, since the negative pressure operation of the hollow portion 209 is different, detailed description thereof will be omitted.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to these embodiments, and the present invention is not limited to these embodiments and is not deviated from the spirit and teaching of the claims. There are improved and modified examples of. It is easily understood by those skilled in the art 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, and osteotomy, and is a series of treatments in perforation, positioning, and joining. The process can be performed accurately and further simplified.

1 Jig for inserting osteosynthesis pin 3 Cylindrical body 3A Grip part 3B Rod-shaped part 5 Air line connection part 7 Connection part 9 Hollow part 11 First opening 13 Second opening 15 Third opening 17 Pin pusher 17A Head part 17B Pressing rod 21 Drilling tool 23 pin 27 Air line (intake module)
29 Rise 31 Waist 33 First intake passage 35 Second intake passage 37 Third intake passage 39 Air line connection Intake passage 101 Bone 103 Bone fragment 105 Joint hole 201 Bone joint pin insertion jig 203 Cylinder 203A Gripping Part 203B Rod-shaped part 205 Air line connection part 207 Connection part 209 Hollow part 211 First opening 213 Second opening 215 Third opening

Claims (3)

A hollow part into which an osteosynthesis pin can be inserted that communicates from the front end to the rear end of the cylinder,
The first opening provided at the tip and
With the second opening provided at the rear end,
The third opening provided on the side surface of the cylinder and
Equipped with
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, or a suction port and a bone fragment suction adjustment port, respectively.
A jig for inserting an osteosynthesis pin. The cylinder is transparent, or the cylinder is provided with a transparent window.
The jig for inserting an osteosynthesis pin according to claim 1. The jig for inserting the osteosynthesis pin according to claim 1 or 2 and the pin pusher for the osteosynthesis pin are provided.
A jig set for inserting osteosynthesis pins .

Images