JP3149688U - Package for stem of artificial hip joint - Google Patents

Abstract

An artificial hip joint stem package capable of stably supporting an artificial hip joint stem with as few supports as possible. An artificial hip joint stem package for storing an artificial hip joint stem (1) having a stem body (3) and a neck portion (5) in trays (20, 30), the stem of the artificial hip joint being a stem body (3). A distal support 53 that supports the distal portion of the stem body 3, a central support 55 that supports the stem body 3 while being inserted through the central portion of the stem body 3, and a neck support 47 that supports the neck portion. A plurality of ridges 43 extending in the tray longitudinal direction are spaced apart from each other along the tray longitudinal direction, and are arranged in contrast to the opposite side, and at least the distal support 53 and The central support 55 is configured to be detachable with respect to a mounting portion 45 formed between the ridge 43 and the adjacent ridge 43. [Selection] Figure 8

Description

  The present invention relates to a package for storing a stem of an artificial hip joint.

  The surgeon who performs the operation selects and uses an artificial hip joint stem that is optimal for the patient according to the bone shape and quality of the patient, the bone loss, the state of the disease, and the like. Therefore, there are many types of stems for artificial hip joints with different dimensional and shape characteristics such as total length, thickness and angle and / or material characteristics and / or functional characteristics such as roughened areas and presence / absence of biomaterial coating. The stem of the hip prosthesis is provided to the operator in the form of an individual package that exists and remains sterile within the package. The stem of an artificial hip joint is generally composed of a stem body and a neck portion, and is basically a chanley type in which the neck portion is bent and arranged in the stem longitudinal direction with respect to the stem body.

  For example, Patent Literature 1 discloses storing an artificial hip joint stem in a bivalve type package. However, in the storage method disclosed in Patent Document 1, a package having a storage portion with a corresponding shape must be prepared for each stem having a different shape, and the number of packages to be prepared is extremely large. .

  In view of this, a storage method has been proposed in which a plurality of supports having different shapes are prepared and appropriately combined in a package to cope with various shapes of artificial hip joint stems. For example, as illustrated in FIG. 1, the support 150 including the first support 150 a, the second support 150 b, the third support 150 c, the fourth support 150 d, and the fifth support 150 e is used as the tray 140 of the package 130. However, a storage method is proposed in which the stem 1 of the artificial hip joint is elastically supported by the five supports 150. The storage method corresponds to a variety of stems 1 by replacing a support at a certain part with a support of another shape according to the shape of the stored stem 1.

Japanese Patent Laid-Open No. 05-184613

  The storage method illustrated in FIG. 1 as the prior art is a combination of five supports 150 including the first support 150a and the like. It is necessary to prepare. For example, if three types of support are required for each part, 3 × 3 × 3 × 3 × 3 = 243 is required as a whole. Therefore, the total number of supports 150 that must be prepared is very large. Further, when the number of the support members 150 increases, the problem of inventory management of the support members 150 becomes complicated, the workability decreases by selecting a specific support member 150 from the many support members 150, or an incorrect combination. The problem of the occurrence of.

  Furthermore, since the support 150 for elastically supporting the stem 1 of the artificial hip joint is made of a special resin material that can withstand gamma irradiation for sterilization and is provided in a small variety of forms, There is a problem that it is very expensive and occupies a large weight in package cost.

  Accordingly, a technical problem to be solved by the present invention is to provide a package for a prosthetic hip stem that can stably support the prosthetic hip stem with as few supports as possible.

  In order to solve the above technical problem, according to the present invention, the following artificial hip joint stem package is provided.

That is, the artificial hip joint stem package according to claim 1 of the present invention is:
A stem of an artificial hip joint having a stem body to be inserted into the bone space and a neck portion that is disposed outside the bone space and is fitted on the distal end side of the head ball is placed in a tray and stored. A package for an artificial hip joint stem for
The stem of the hip prosthesis includes a distal support that supports a distal portion of the stem body, a center support that supports the distal portion of the stem body while being inserted, and a neck support that supports the neck portion. Is supported in the tray by
A plurality of ridges extending in the direction perpendicular to the tray length are spaced apart along the tray length direction, and arranged in contrast to the opposite side,
At least the distal support and the central support are configured to be detachable with respect to a mounting portion formed between the ridge and the adjacent ridge.

  In the artificial hip joint stem package according to claim 2 of the present invention, the ridge is formed on a support plate provided separately from the tray.

  In the stem package for an artificial hip joint according to claim 3 of the present invention, the neck support is fixed on a support plate.

  In the stem package for an artificial hip joint according to claim 4 of the present invention, the neck support is configured to be detachable from the mounting portion.

  The artificial hip joint stem package according to claim 5 of the present invention is characterized in that the tray is an inner tray accommodated in the outer tray.

  In the stem package for an artificial hip joint according to claim 6 of the present invention, the distal support body includes a base portion mounted on the mounting portion and a protruding portion protruding in the tray longitudinal direction with respect to the base portion. It is characterized by a step structure.

  The artificial hip joint stem package according to claim 7 of the present invention is characterized in that the distal support and the central support are connected via a connecting portion.

  The artificial hip joint stem package according to claim 8 of the present invention is characterized in that the connecting portion can be expanded and contracted in the tray longitudinal direction.

  The artificial hip joint stem package according to claim 9 of the present invention is characterized in that the support that is detachable from the mounting portion is made of a sponge-like resin material having anti-gamma radiation characteristics.

  The artificial hip joint stem package according to claim 10 of the present invention is characterized in that when the stem of the artificial hip joint has a rough surface portion, the central support is disposed at a position not overlapping the rough surface portion.

  The present invention according to claim 1 provides a configuration in which the stem of the artificial hip joint is supported and stored in the tray by at least two stem supports, namely, the distal support and the central support, and the neck support. It is possible to reduce the package cost by reducing the amount of the support used.

  Ridges can be formed directly on the tray, but the complexity of the tray structure is complicated by the incorporation of various components into the tray, making it difficult to respond quickly to tray and package design changes. become. The present invention according to claim 2 provides a configuration in which the ridge is provided on a support plate that is separate from the tray, so that the degree of freedom in designing the tray and the package is increased.

  The present invention according to claim 3 has an effect of reducing the amount of the expensive support used.

  The present invention according to claim 4 has an effect that the structure of the support plate is simplified.

  Since the present invention according to claim 5 provides a double storage structure comprising an inner tray and an outer tray, an effect of obtaining a highly sterile package can be obtained.

  In the present invention according to claim 6, since both the surface of the base portion and the surface of the protruding portion can be used as a support surface for supporting the distal portion of the stem body, it is possible to reduce the number of preparations of expensive supports. There is an effect.

  The present invention according to claim 7 has an effect that the number of expensive stem supports used can be reduced because only one stem support is required by connecting the distal support and the central support.

  According to the eighth aspect of the present invention, since the mounting position of the stem support can be changed by expansion and contraction of the connecting portion, there is an effect that the number of preparations of expensive support can be reduced.

  The present invention according to claim 9 has an effect of providing a sterilized package that is not deformed even by irradiation with gamma rays.

  The present invention according to claim 10 has the effect of preventing the occurrence of harmful action on the living body due to the abrasion powder of the central support generated by rubbing the rough surface portion and the central support.

It is a schematic diagram which shows the package which concerns on a prior art. It is a top view which shows the stem of an artificial hip joint. It is a top view which shows a stem with a cap. It is sectional drawing of the cap with which the neck part of a stem is mounted | worn. It is a figure explaining a distal support body. (A) is a plan view and (B) is a front view. It is a figure explaining a center support body. (A) is a plan view and (B) is a front view. It is a top view which shows the package which concerns on 1st embodiment of this invention. It is the typical perspective view which expand | deployed the package shown in FIG. It is a top view which shows the package which concerns on 2nd embodiment of this invention. It is a top view which shows the package which concerns on 3rd embodiment of this invention.

  Hereinafter, embodiments of the package 10 of the present invention will be described in detail with reference to the drawings.

  First, the package 10 according to the first embodiment of the present invention will be described with reference to FIGS.

  2 is a plan view showing the stem 1 of the artificial hip joint, FIG. 3 is a plan view showing the stem 1 with the cap 9, and FIG. 4 is a cross-sectional view of the cap 9 attached to the neck portion 5 of the stem 1. 5 is a diagram for explaining the distal support 53, FIG. 6 is a diagram for explaining the central support 55, FIG. 7 is a plan view of the package 10, and FIG. 8 is a package shown in FIG. FIG.

  The artificial hip joint is generally embedded and fixed in the stem 1 inserted and fixed in the femoral bone space, the head ball fitted and fixed to the neck portion 5 of the stem 1, and the acetabulum of the pelvis. Socket.

  As shown in FIG. 2, the stem 1 of the artificial hip joint includes a stem body 3 and a neck portion 5, and the neck portion 5 is bent at an angle with respect to the stem longitudinal direction with respect to the stem body 3. It is a so-called Chanlay type arranged. For example, the angle formed by the central axis of the stem body 3 and the central axis of the neck portion 5 is approximately 35 to 55 degrees. The stem 1 is made of a metal having no biological harm such as a cobalt chromium alloy or a titanium alloy.

  The stem body 3 is a portion that is inserted into and fixed to the femoral bone space and is proximal to the distal portion 3b, the central portion 3c, and the proximal portion along the longitudinal direction of the stem from the distal end 3a toward the neck portion 5. 3d are sequentially provided. As the neck portion 5 is approached, the stem body 3 becomes thicker, that is, the cross-sectional area of the stem body 3 increases. In other words, the cross-sectional area of the proximal portion 3d> the cross-sectional area of the central portion 3c> the cross-sectional area of the distal portion 3b. Moreover, since the distal end 3a is inserted into the back of the bone space, it has a tapered shape.

  In FIG. 2, the entire length of the stem body 3 is schematically shown as A, the length of the distal portion 3 b is B, and the length of the central portion 3 c is C. As will be described later, the distal portion 3b and the central portion 3c correspond to portions supported by the distal support 53 and the central support 55, respectively. As a preferred example, the length B of the distal portion 3b and the length C of the central portion 3c are A / 6 and 2A / 3, respectively.

  A rough surface portion 7 having minute irregularities is formed on the outer peripheral surface of the stem body 3 from the proximal portion 3d to the central portion 3c. The rough surface portion 7 is formed by depositing a titanium-based material by a known thermal spraying technique, and provides an osteoinductive action for growing bone in the minute irregularities of the rough surface portion 7 having a large surface area. In addition, when such a rough surface part 7 is provided also in the center part 3c, there exists a possibility that the abrasion resin powder of the center support body 55 may generate | occur | produce when the rough surface part 7 and the center support body 55 rub. Since the wear resin powder may be harmful to a living body, that is, a patient undergoing implantation surgery, in order to prevent the generation of such wear resin powder, the center support is provided at a position that does not overlap the rough surface portion 7. A body 55 is arranged.

  In addition, the surface of the stem body 3 can be coated with a bone growth-inducing material having excellent affinity with bone, for example, a calcium phosphate compound.

  The neck portion 5 is a bent portion that extends while being bent from the stem body 3 in order to connect the head ball to the stem 1 and has a substantially cylindrical shape. In order to protect the neck portion 5, a cap 9 made of silicon rubber is attached. As shown in FIG. 4, the cap 9 includes a small-diameter concave portion 9a and a large-diameter concave portion 9b so as to cope with two types of neck diameters.

  The stem 1 of the artificial hip joint is housed in a package 10 shown in FIGS.

  As shown in FIGS. 7 and 8, the package 10 includes a distal support 53 and a central support 55, a support plate 40, a spacer 60, an inner tray 30, an inner lid sheet material (not shown), and an outer tray. 20 and an outer lid sheet material (not shown). At least the inner tray 30 and the outer tray 20 are made of a translucent material so that the stem 1 accommodated in the package 10 can be seen.

  The distal support 53 and the central support 55 are sponge-like elastic bodies obtained by foaming a polyethylene resin material. As shown in FIG. 5, the distal support 53 has a two-stage structure including a base portion 53a attached to the attachment portion 45 described later, and a protrusion 53b protruding in the tray longitudinal direction with respect to the base portion 53a. I am doing. The distal end 3a of the stem 1 is abutted and supported by either the base portion 53a side surface or the protruding portion 53b side surface. Even in the same mounting portion 45, the contact surface with the distal end 3a of the stem 1 is changed to the surface on the base portion 53a side or the protruding portion 53b side by changing the mounting direction of the base portion 53a with respect to the mounting portion 45. This can correspond to the length of the overall length A of the stem body 3. As shown in FIG. 6, the central support 55 has a through hole 55a penetrating in the tray longitudinal direction. The diameter of the through hole 55a is sized and configured to receive the central portion 3c of the stem body 3.

  The support plate 40 includes a plurality of ridges 43 and one neck support portion 47 on one surface of a flat base body 41. The base body 41 includes a notched engaging recess 49. The engaging concave portion 49 engages with an engaging convex portion 37 disposed on a side wall 31 of the inner tray 30 described later. These engaging members 37 and 49 act as positioning guides for the inner tray 30 of the support plate 40.

  The plurality of ridges 43 extending in the tray longitudinal direction are spaced apart from each other along the tray longitudinal direction, and are also disposed on the opposite side. A mounting portion 45 is formed between a gap between a certain ridge 43 and the adjacent ridge 43 or between the ridge 43 and the engaging convex portion 37. Therefore, the support plate 40 includes a plurality of mounting portions 45 along the tray longitudinal direction. The base 53a and the central support 55 of the distal support 53 are respectively mounted on the mounting portion 45 at an appropriate position. In the example illustrated in FIG. 7, six pairs of ridges 43 are arranged, four mounting portions 45 are formed by the ridges 43, and two mounting portions 45 are formed by the ridges 43 and the engaging convex portions 37. Each is formed.

  A neck support portion 47 is disposed at a corner portion of the support plate 40. The neck support part 47 has an insertion hole 47a for receiving the neck part 5 with the cap 9 shown in FIG. The angle formed by the center axis of the insertion hole 47a and the tray longitudinal orthogonal direction substantially matches the angle formed by the center axis of the stem body 3 and the center axis of the neck portion 5 described above.

  When the stem 1 is supported on the support plate 40, the following preparatory work is performed in a clean room. That is, a distal support 53 and a central support 55 suitable for the stem 1 to be packaged are prepared, and air blow and appearance inspection are performed on them to remove foreign matter. Similarly, air blow and appearance inspection are performed on the stem 1 to remove foreign matter. The central support 55 is fitted and inserted into the central portion 3 c of the stem body 3, and the neck portion 5 with the cap 9 is inserted into the neck support portion 47 in a state where the distal support 53 is in contact with the distal end 3 a of the stem body 3. While inserting into the hole 47a, the distal support body 53 and the central support body 55 are mounted on an appropriate mounting portion 45, and the stem 1 and the support plate 40 are combined.

  Therefore, the stem 1 of the artificial hip joint is supported via the distal support 53 and the central support 55 that are mounted on the mounting portion 45 of the support plate 40 and the neck support 47 that is fixed to the support plate 40. It is elastically supported on the plate 40. With such a support structure, the stem 1 is prevented from performing a turning motion around the central axis of the stem body 3 and the stem 1 is prevented from moving in the direction of the central axis of the stem body 3.

  The support plate 40 provided with the stem 1 of the artificial hip joint is a size larger than the support plate 40 and is accommodated in the inner tray 30 having a box shape by the side wall 31 and the bottom wall. On the inner surface of the side wall 31, an engagement convex portion 37 protruding inward is provided. Further, a flange portion 33 projecting to the outer periphery is provided on the upper edge portion of the side wall 31. The inner tray 30 is made of translucent polyethylene terephthalate.

  After the support plate 40 supported by the stem 1 of the artificial hip joint is placed in the inner tray 30, an inner cover sheet material (made of polyethylene) (not shown) is placed with a sheet-like spacer 60 interposed. The inner lid sheet material and the inner tray 30 are heat-sealed at the flange portion 33 of the inner tray 30, and the inner tray 30 is sealed.

  Such an inner tray 30 is one size larger than the inner tray 30 and is accommodated in the outer tray 20 having a box shape by the side wall 21 and the bottom wall. A flange portion 23 is provided on the upper edge of the side wall 21 so as to project to the outer periphery. The outer tray 20 is also made of translucent polyethylene terephthalate. After placing the inner tray 30 in the outer tray 20, an unillustrated outer lid sheet material (made of polyethylene) is placed. The outer lid sheet material and the outer tray 20 are heat-sealed at the flange portion 23 of the outer tray 20, and the outer tray 20 is sealed. Thereafter, the outer tray 20 including the stem 1 of the artificial hip joint is irradiated with gamma rays, and sterilization treatment with gamma rays is performed.

  7 and 8, the distal support 53 is arranged so that the surface on the base portion 53a abuts on the distal end 3a, but the reverse arrangement, that is, the surface on the projection 53b side is arranged. It is also possible to adopt a configuration in which the distal support 53 is disposed so as to abut on the distal end 3a.

  Next, the package 10 according to the second embodiment of the present invention will be described with reference to FIG. 9, but the description of the parts overlapping with the first embodiment is omitted, and the parts different from the first embodiment. Will be described.

  In the package 10 shown in FIG. 9, when the flat distal support part 57a and the central support part 57b are connected via the connection part 57c, that is, the distal support part 57a and the central support part 57b are integrated. The other configurations are the same as those in the first embodiment. By integrating the distal support portion 57a and the central support portion 57b, only one stem support member 57 is required, so that the amount of expensive stem support members 57 used can be reduced.

  It is preferable that the connecting portion 57c can be expanded and contracted in the tray longitudinal direction so that the mounting positions of the distal support portion 57a and the central support portion 57b can be appropriately changed by expansion and contraction of the connecting portion 57c. For example, the connection part 57c can be made to be a stretchable structure by making the connection part 57c have a thin structure or by making the connection part 57c a bellows structure. As a result, there is an effect that the preparation quantity of the expensive stem support 57 can be reduced.

  Next, the package 10 according to the third embodiment of the present invention will be described with reference to FIG. 10. Similarly, parts different from the first embodiment will be described.

  The package 10 illustrated in FIG. 10 is attached to the mounting portion 45 instead of supporting the neck portion 5 by the insertion hole 47a of the neck support portion 47 fixed on the support plate 40 as in the first embodiment. The neck portion 5 is supported by the support hole 59a of the neck support 59 configured to be detachable.

  Ridges 43 extending in the direction perpendicular to the tray length and spaced apart along the tray length direction are formed up to the placement position of the neck portion 5, and the number of ridges 43 is also larger than in the first embodiment. ing. In the non-limiting example of FIG. 10, ten pairs of ridges 43 are arranged, and eight mounting portions 45 are formed by the ridges 43. The mounting portion 45 located at the left end in FIG. 10 is used for mounting the neck support 59 with the cap 9.

  The neck support 59 is made of a sponge-like elastic body obtained by foaming a polyethylene resin material. The neck support 59 has a support hole 59a extending in a direction inclined with respect to the tray longitudinal direction. The hole diameter of the support hole 59a of the neck support 59 is sized and configured to receive the neck portion 5 with the cap 9.

  Accordingly, the stem 1 of the artificial hip joint is elastically supported on the support plate 40 via the distal support 53, the central support 55, and the neck support 59 attached to the mounting portion 45 of the support plate 40. ing. With such a support structure, the stem 1 is prevented from performing a turning motion around the central axis of the stem body 3 and the stem 1 is prevented from moving in the direction of the central axis of the stem body 3.

  In the first to third embodiments, the support plate 40 may be integrated with the inner tray 30. In that case, the ridge 43 and the neck support 47 described above can be provided on the bottom wall of the inner tray 30, or the ridge 43 and the neck support 47 can be provided on the side wall 31 and the bottom wall of the inner tray 30, respectively.

1: Stem 3: Stem body 3a: Distal end 3b: Distal part 3c: Central part 3d: Proximal part 5: Neck part 7: Rough surface part 9: Cap 9a: Small diameter concave part 9b: Large diameter concave part 10: Package 20 : Outer tray 21: Side wall 23: Flange part 25: Storage part 30: Inner tray 31: Side wall 33: Flange part 35: Storage part 37: Engaging convex part 40: Support plate 41: Base body 43: Ridge 45: Mounting part 47: Neck support 47a: insertion hole 49: engagement recess 53: distal support (stem support)
53a: Base part 53b: Protruding part 55: Center support body (stem support body)
55a: Through-hole 57: Stem support 57a: Distal support 57b: Central support 57c: Connection 59: Neck support 59a: Support hole 60: Spacer 130: Package 140: Tray 150: Support 150a: First Support 150b: Second support 150c: Third support 150d: Fourth support 150e: Fifth support

Claims (10)

A stem of an artificial hip joint having a stem body to be inserted into the bone space and a neck portion that is disposed outside the bone space and is fitted on the distal end side of the head ball is placed in a tray and stored. A package for an artificial hip joint stem for
The stem of the hip prosthesis includes a distal support that supports a distal portion of the stem body, a center support that supports the distal portion of the stem body while being inserted, and a neck support that supports the neck portion. Is supported in the tray by
A plurality of ridges extending in the direction perpendicular to the tray longitudinal direction are spaced apart along the tray longitudinal direction, and are arranged in contrast on the opposite side,
A package for a stem of an artificial hip joint, wherein at least the distal support and the central support are configured to be detachable from a mounting portion formed between the ridge and the adjacent ridge. .   The package according to claim 1, wherein the ridge is formed on a support plate provided separately from the tray.   The package according to claim 2, wherein the neck support is fixed on the support plate.   The package according to claim 1, wherein the neck support is configured to be detachable from the mounting portion.   The package according to claim 1, wherein the tray is an inner tray stored in an outer tray.   The distal support body has a two-stage structure including a base portion attached to the attachment portion and a protruding portion protruding in the tray longitudinal direction with respect to the base portion. Item 1. The package according to Item 1.   The package according to claim 1, wherein the distal support body and the central support body are connected through a connecting portion.   The package according to claim 7, wherein the connecting part is extendable and contractible with respect to the tray longitudinal direction.   The package according to claim 1, wherein the support that is detachable with respect to the mounting portion is made of a sponge-like resin material having anti-gamma radiation characteristics.   2. The package according to claim 1, wherein when the stem of the artificial hip joint has a rough surface portion, the central support is disposed at a position not overlapping the rough surface portion.

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