JPH076887Y2 - Auxiliary tool for bone drilling during small animal surgery - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone piercing aid used for piercing a bone to be operated during surgery on small animals such as dogs and cats, and more specifically, a bone called a drill guide. The present invention relates to a drilling aid.

[0002]

2. Description of the Related Art In a traffic accident or the like, for example, when the hip joint is dislocated, hip joint dislocation reduction is performed. Hip dislocation reduction is the return of the dislocated femoral head to the hip acetabulum. At this time, after reducing the body as before, make a hole in the femoral head so that the hip joint does not have a dislocation habit, and use a fixing tool such as a wire, string, band, or pin to insert the hole into the hip joint. Fasten to the bone. A tool for drilling bone called a drill guide is used in such a case. As shown in FIG. 5, this bone-perforating aid has a grip portion 1 having a tubular guide tube 11 with both ends open, and a curved connecting rod 2 to extend on an extension line of the tube axis of the guide tube 11. A slide cylinder 14 is provided which is provided with a nail-shaped engaging portion 7 in series and which is open at both ends and is provided continuously with the tip of a grip portion 4 which is gripped together with the grip portion 1.
Is slidably inserted into the sliding cylinder 14 and the nail-shaped engaging portion 7
And constitute a gripping part 5 for gripping the bone 100 to be drilled, the guide cylinder 6 of the drilling tool 200 is fitted into the sliding cylinder 14 and slidably moves inside the guide cylinder 6. The piercing tool 200 is capable of piercing a through hole 100 ′ in a target site of the bone 100. In such a bone piercing aid, when gripping the gripping part 1 together with the gripping part 4, the nail-shaped engaging part 7 and the tip of the sliding cylinder 14 are used to grip the target part of the bone 100. After the auxiliary tool for perforation is fixed to the perforation target site, a predetermined perforation tool 200 is inserted from the guide cylinder 6 to perform the perforation work.

[0003]

However, the prior art bone-piercing aids have the following problems. -If the bone 100 to be perforated has a very high hardness, such as the femoral head of the femur, the nail-shaped engaging portion 7 does not serve as a fixing member and slips down the peripheral surface of the bone 100 when gripping. The desired part cannot be grasped stably. -The gripping position may be displaced due to the influence of vibration of the punch tool 200, and in such a case, there is a risk that the punch tool 200 is divided or the punch tool 200 damages organs, muscle tissue, and the like.・ Because it is not visible on the back side of the femoral head (the side that approaches the mortar), it is troublesome to confirm the completion of perforation. Further, as shown in FIG. 6, the bone corresponding to the nail-shaped engaging portion 7
There is also a method in which a prepared hole 101 is drilled in a predetermined portion of 100 and a bone 100 is grasped with a sliding cylinder in a state where the nail-shaped engaging portion 7 is engaged with the prepared hole 101. However, not only is the operation complicated because it requires a separate drilling operation of the prepared hole 101, but also when the bone 100 to be drilled has the back side approaching the acetabulum such as the femoral head of the femur, the back side should be specified. Since it is not possible to make a pilot hole in the site, surgery becomes very difficult.

The present invention has been made in view of the above-mentioned conventional circumstances, and its object is to perforate a bone in a small animal operation by which a target bone site can be stably grasped and the completion of perforation can be easily confirmed. It is to provide an auxiliary tool.

[0005]

[Means for Solving the Problems] The technical means taken to achieve the above-mentioned object is to provide a guide cylinder cylinder shaft from a grip portion having a cylinder guide cylinder whose both ends are opened through a curved connecting rod. An engaging portion is continuously provided on the extension line of the above, and a sliding cylinder that is open at both ends and that is continuously provided at the tip of the grip portion that is gripped together with the grip portion is slidably inserted into the guide cylinder. A tip part of the sliding cylinder and the engaging part constitute a gripping part for gripping a bone to be drilled, and the inside of the sliding cylinder is used as a guide part for the drilling tool to assist the bone drilling during small animal surgery. In the above, the engaging portion is opened at a portion of the main body having a corresponding surface along the curved surface of the corresponding bone on the inner surface, and a portion of the corresponding surface of the main body facing the punch, Is provided with a contact hole for accommodating the tip portion thereof by projecting it from the outer surface of the main body portion. Further, it is effective if several kinds of body parts having corresponding surfaces having different curvatures are prepared and the body part is attached to the connecting rod part in a replaceable manner.

[0006]

According to the above technical means, there are the following actions.
(Claim 1) The inner surface of the main body of the engaging portion that constitutes one of the gripping portions, that is, the corresponding surface formed along the curved surface of the bone, has a wide area within a predetermined range of the bone to increase the frictional resistance. They are in close contact with each other, thereby stably grasping the target site of perforation of the bone.
Further, the tip of the punch is projected from the main body to the outside so that it can be touched. (Claim 2) A main body having a corresponding surface adapted to the curvature of the peripheral surface of the bone can be replaced appropriately.

[0007]

As described above, according to the present invention, since the engaging portion having the corresponding surface along the curved surface of the bone constitutes one of the holding portions, the pilot hole for engaging the engaging portion is formed. Even without doing so, the target site can be stably grasped. Therefore, it is possible to provide a safe auxiliary tool for bone perforation that surely avoids the division of the perforation tool due to the displacement of the gripping position during perforation, and the damage to organs, muscle tissue, etc. in the perforation tool. Moreover, since the main body portion has the corresponding hole having a shape along the curved surface of the bone, the abutment hole for accommodating the tip of the perforating tool with its tip protruding from the outer surface is formed. Even if you cannot see the back side like the head of a bone, you can easily confirm the completion of drilling with your finger etc., and it is convenient, and the abutment hole also has a stopper function for the drilling tool, and the drilling tool protruding from the hole Therefore, the organs, muscles, etc. are not damaged, and since the pointed part is accommodated in the contact hole, a hole having a predetermined diameter can be accurately drilled from the end to the end of the operation, which simplifies the surgery. In addition, if a main body section having several types of corresponding surfaces with different curvatures is prepared, it can be adapted to the type of bone and the size of small animals.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 4 show a bone perforation assisting tool at the time of surgery for a small animal of the present embodiment, and a symbol A is the bone perforating assisting tool.

This bone punching aid A has a grip portion 1 having a guide tube 11 whose both ends are open, and a curved connecting rod portion 2.
The engaging portion 3 is continuously provided on the extension line of the guide cylinder 11 cylinder shaft via
A sliding cylinder 14 that is connected to the tip of a gripping portion 4 that is gripped together with the grip portion 1 and is open at both ends is slidably inserted into the guide cylinder 11 so that the sliding cylinder 14 and the sliding cylinder 14 are connected to each other. The gripping portion 5 for gripping the bone 100 to be drilled is configured with the engaging portion 3, and the guide cylinder 6 of the drilling tool 200 is fitted into the sliding cylinder 14 to form a conventionally known basic structure. Has become.

As is well known in the art, the guide cylinder 6 is provided with several kinds of interchangeable inner diameters so that it can be used according to the outer diameter of the punch 200.
When not used as required (when punching with a punch having a large diameter), the inside of the sliding cylinder 14 serves as a guide portion for the punch 200 directly.

The engaging portion 3 which is the gist of the present invention has a body portion 13 having a corresponding surface 13a along the curved surface of the corresponding bone 100 on the inner surface.
And the corresponding surface 13a of the body portion 13 is opened at a portion facing the punch tool 200, and the pointed portion 200a of the punch tool 200 is opened.
And a contact hole (23) for accommodating the tip portion thereof by projecting it from the outer surface of the main body portion (13).

As shown in the drawing, the main body 13 is a concave lens type having a circular shape in a side view, and the corresponding surface 13a, which is an inner surface, is formed in a shape along the curved surface of the perforation site of the bone 100 to be perforated, and has an area of Has a diameter of about 4 mm or more.

As shown in the figure, the abutment hole 23 is formed in a truncated cone shape so that the tip 200a of the punch 200 can be accommodated exactly except the tip.

Further, the pointed portion 200a whose shape changes depending on the diameter of the perforation tool 200 and the bone 100 to be perforated.
It is desirable to change the thickness of the main body portion 13, the diameter of the contact hole 23, and the curvature of the corresponding surface 13a depending on the peripheral surface curvature and the like. Therefore, several kinds of main body portions 13 having different thicknesses, diameters and shapes of the contact holes 23, and curvatures of the corresponding surfaces 13a can be exchanged with the terminal end portion of the connecting rod portion 2.

The connection between the main body portion 13 and the connecting rod portion 2 is performed so that the base end portion of the main body portion 13 and the end portion of the main body portion 13 form a round bar portion as shown in FIGS. A base member and a terminal part are formed by half rod bodies 33, 33 of a round bar portion, a continuous screw 43 is screwed on the outer surface of the half rod bodies 33, 33, and a nut member screwed to the continuous screw 43. The two halves 33, 33 are fastened together by 53, and the nut member 53 is loosened to release the screwing relationship with the continuous screw 43, so that the thickness, the diameter of the contact hole 23, the shape, and the curvature of the corresponding surface 13a can be obtained. It becomes possible to replace several types of main body parts 13 with different types.

By the way, in this embodiment, as shown in FIG. 3, a relatively large contact hole 23 having a small diameter at its tip is formed so as to correspond to the diameter of the perforation tool 100.
In this way, in the case of the main body 13 which is opened assuming the perforation tool 200 having the maximum diameter, the diameter of the contact hole 23 is reduced to the minimum necessary number of types of the main body 13 to be exchanged. be able to.

Next, the operation of the auxiliary tool for bone perforation during the operation of the small animal of this embodiment will be briefly described. In FIGS. 2 and 3, the femoral head as the bone 100 to be perforated is grasped by the grasping portion 5. The corresponding surface 13a of the main body 13 in the engaging portion 3 is
The face 100 is brought into surface contact with the side face approaching the mortar 0, and the face 100 is grasped by the sliding cylinder 14 whose tip is locked to the face side face of the face 100 facing the face 13a. is doing. In this state, the bone-piercing aid A is stable without slipping due to the engaging portion 3 that receives the gripping force, increases the frictional resistance, and comes into close contact with a wide area, and the sliding cylinder 14 having the toothed portion at the tip. Is grabbed by. The perforation tool 200 is housed in a state in which the tip 200a of the perforation tool 200a is partly projected from the outer surface of the main body 13 to the outside when the perforation 200a is completed, and it is possible to confirm by touch.

It should be noted that the assisting device for bone perforation during small animal surgery according to the present invention can be applied to all cases in which a through hole is drilled at a predetermined perforation site of the bone to be perforated, and the hip joint as disclosed in the embodiments. It is not limited to dislocation reduction.

[Brief description of drawings]

FIG. 1 is a front view.

FIG. 2 is a front sectional view.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a punched state.

FIG. 4 is a perspective view showing a replacement state of the main body.

FIG. 5 is a partially cutaway view showing a front view of a conventional bone-piercing aid.

FIG. 6 is an enlarged cross-sectional view showing another usage pattern of the bone-piercing aid.

[Explanation of symbols]

A: Auxiliary tool for bone drilling 1: Grip part 2: Connecting rod part 3: Engaging part 4: Gripping part 5: Gripping part 6: Guide tube 14: Sliding tube 200: Drilling tool 100: Bone 11: Guidance Cylinder 13: Main body 13a: Corresponding surface 23: Contact hole 200a: Tip

Claims (2)

[Scope of utility model registration request] 1. A grip portion having a tubular guide tube whose both ends are open, and an engaging portion is continuously provided on an extension line of the guide tube cylinder shaft through a curved connecting rod, and is gripped together with the grip portion. The sliding cylinder, which is connected to the tip of the gripping portion and is open at both ends, is slidably inserted into the guide cylinder so that the tip of the sliding cylinder and the bone to be pierced are the bones to be drilled. Configure the gripping part to grip,
In a bone drilling aid during small animal surgery, in which the inside of the sliding cylinder is used as a guide for the drilling tool, the engaging section has a main body section having a corresponding surface along the curved surface of the corresponding bone on its inner surface, and the main body section thereof. At the time of small animal surgery, the corresponding surface of the punching tool is opened at a site facing the punching tool, and the pointed end of the punching tool is provided with a tip hole projecting from the outer surface of the main body to accommodate the tip. Auxiliary tool for bone drilling. 2. A small animal surgery characterized in that several types of body parts having corresponding surfaces having different curvatures are prepared, and the body parts are detachably attached to the connecting rod part. Auxiliary tool for bone drilling at the time.