CN204337023U - Head marrow nail - Google Patents
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- CN204337023U CN204337023U CN201420700854.6U CN201420700854U CN204337023U CN 204337023 U CN204337023 U CN 204337023U CN 201420700854 U CN201420700854 U CN 201420700854U CN 204337023 U CN204337023 U CN 204337023U
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Abstract
Disclose a kind of head marrow nail, comprising: mobile jib, containing the first and second ends; Inter-locking screw, is being fixedly linked near the first end place of mobile jib and mobile jib; Femoral head neck fixture, is being fixedly linked near the second end place of mobile jib and mobile jib.Femoral head neck fixture comprises: main nail, containing the first and second ends, makes main nail being fixedly connected with mobile jib near its second end place thus and be an inclination angle with mobile jib by the first inclined hole and passing near its second end on mobile jib; And umbrella shape stabilising arrangement, be arranged on main nailing near its first end place, and be the central axis that it is opened or draws in the length direction of main nail.The sclerite that head marrow of the present disclosure nail can reset to femoral head and neck lease making plays the fixing of enhancing and supporting role thus makes these sclerites comparatively be not easy to occur that back and forth or left and right is moved or rotates and then make the reduction of the fracture more firm.Can effectively prevent main nail from passing from femoral head neck part or causing cutting to it in addition.
Description
Technical field
The disclosure relates to a marrow nail, particularly relates to the head marrow nail of the Hip Fracture reduction therapy of the such as femoral intertrochanteric and subtrochanteric fracture and so in clinical medicine.
Background technology
Femoral intertrochanteric and subtrochanteric fracture are more common in old people, and at present, its Therapeutic Method comprises expectant treatment and operative treatment.Operative treatment is mainly divided into Medullary fixation and the large class of marrow extenal fixation two.In recent years, use head marrow nail to carry out Medullary fixation to treat femoral intertrochanteric and subtrochanteric fracture is more and more general because Medullary fixation existence and stability comparatively strong, peel off the unexistent advantages of marrow extenal fixation such as surrounding tissue is less.
Fig. 1 a is the schematic diagram of femoral intertrochanteric and subtrochanteric fracture.Fig. 1 b is the close up fragmentary figure of femoral intertrochanteric and subtrochanteric fracture.As seen in figure la and lb, in this article, as usually understood in those of ordinary skill in the art, term " nearside " and " distally " are comparatively speaking, the former generally refers to that side closer to human heart, and the latter generally refers to that side further from human heart.
In order to high-visible and be convenient to describe, in Figure 1b along the direction of femoral shaft and the direction along femoral head neck, illustrate respectively and designate the relativeness in " nearside " and " distally ".In addition, Fig. 1 b also particularly illustrates femoral head 101 and neck of femur 103, hereafter more specifically can describe in conjunction with femoral head 101 and neck of femur 103 the head marrow nail that the disclosure relates to.
Fig. 2 a is the schematic diagram of the short head marrow nail 200a of prior art.Fig. 2 b is the schematic diagram of the elongated head marrow nail 200b of prior art.As shown in figures 2 a and 2b, head marrow nail 200a or 200b of prior art comprises three ingredients: (1) mobile jib 201a or 201b, wherein, the distance that the mobile jib 201a of short head marrow nail 200a inserts in femoral shaft is no more than femur anterior arch summit (mid point) M, and the mobile jib 201b of elongated head marrow nail 200b inserts distal part of femur condyles; (2) femoral head neck fixture 203a or 203b of nearside, for the sclerite of resected femur 101 and neck of femur 103 part, can comprise main nail 210a or 210b, wherein, described main nail 210a or 210b can be lag screw or screw blade; And inter-locking screw 205a or 205b in (3) distally.
In addition, in this article, for convenience of description and without loss of generality, the pointed portion of various nail can be called as first end, rightaboutly the second end can be called as by the blunt nosed or head of a nail part of knocking.
In the prior art, as shown in figures 2 a and 2b, head marrow nail 200a or 200b adopts single piece of main nail 210a or 210b to the fixing general of femoral head neck sclerite, such as, and the lag screw (such as diameter 10mm) of single piece thick or screw blade.But the diameter of femoral head neck sclerite is generally at about 30mm, and inside is medullary cavity.So main nail 210a or 210b (such as lag screw or screw blade) for resected femur head and neck sclerite is arranged in medullary substance body, therefore very limited to the fixing and supporting role of the sclerite of femoral head neck part.
Like this, the sclerite of femoral head neck part is easy to the movement occurring direction, back and forth or left and right after a reset, or rotate, thus cause the loss of the reduction of the fracture, special in senile osteoporosis, main nail 210a or 210b longitudinally may pass the head and neck cortex of femoral head neck sclerite or carry out transverse cuts to it.These are all by the healing of the stability and fracture that affect the reduction of the fracture.
Therefore, wish a kind of head marrow nail of improvement, the sclerite that can reset to femoral head and neck lease making has the fixing of enhancing and supporting role, thus make the sclerite of femoral head neck part comparatively be not easy to occur movement or the rotation in direction, back and forth or left and right after a reset, and then make the reduction of the fracture more firm, in addition, can also effectively prevent main nail the above-mentioned of 210a or 210b for marrow nail from passing or cutting.
Utility model content
For the above-mentioned problems in the prior art, an object of the present disclosure is to provide a kind of head marrow nail, and comprising: mobile jib, described mobile jib comprises first end and the second end; Inter-locking screw, is being fixedly linked near the first end place of described mobile jib and described mobile jib; Femoral head neck fixture, is being fixedly linked near the second end place of described mobile jib and described mobile jib; Wherein, described femoral head neck fixture comprises: main nail, described main nail comprises first end and the second end, described main nail is passed by the first inclined hole of the second end near described mobile jib on described mobile jib, make described main nail be fixedly connected with described mobile jib at the second end place near described main nail thus, and be an inclination angle with described mobile jib; And umbrella shape stabilising arrangement, described umbrella shape stabilising arrangement is arranged on the first end place that described master nails on close described main nail, and is the central axis that described umbrella shape stabilising arrangement is opened or drawn in the length direction of described main nail.
According to an aspect of the present disclosure, in above-mentioned head marrow nail, described umbrella shape stabilising arrangement comprises the first umbrella shape regulator, wherein, described first umbrella shape regulator comprises at least three memory metal rods, there is the first distance in direction towards the first end of described main nail on the excellent side being arranged on described main nail of described at least three memory metals from described first inclined hole, the circumferentially uniform intervals of described first distance of at least three ends on the side of described main nail that described at least three memory metals rod is connected with described main nail arranges, described at least three memory metals rod and describedly mainly follow closely into predetermined angular, make described first umbrella shape regulator in opened condition and its umbrella point points to towards the first end of described main nail.
According to another aspect of the present disclosure, in above-mentioned head marrow nail, described first umbrella shape regulator comprises three memory metal rods, described first distance of three ends on the side of described main nail that described three memory metals rod is connected with described main nail circumferentially by 120 °, uniform intervals arranges, and described three memory metals rod all mainly follows closely into 130 ° of angles with described, make described first umbrella shape regulator in opened condition and the sharp first end towards described main nail of its umbrella points to.In addition, described first umbrella shape regulator be dipped in frozen water reach predetermined a period of time after be deformable, make described three memory metal rods be deformed into thus and be close to described main nail, thus make described first umbrella shape regulator be rounding state, and risen with temperature by described three memory metals rod and progressively revert to and originally all mainly followed closely into the state at 130 ° of angles with described and finally revert in opened condition in the described first umbrella shape regulator wherein, in rounding state after being placed into human body with described mobile jib together with described main nail.Described first distance is 5-10mm, make described first umbrella shape regulator in human femoral head neck portion in opened condition time fixing and supporting femoral head cortex.
According to another aspect of the present disclosure, in above-mentioned head marrow nail, described umbrella shape stabilising arrangement also comprises the second umbrella shape regulator, wherein, described second umbrella shape regulator comprises other three memory metal rods, there is second distance place in direction towards the first end of described main nail on the described excellent side being arranged on described main nail of other three memory metals from described first inclined hole, described second distance is less than described first distance, the described second distance place of three ends on the side of described main nail that described other three memory metals rod is connected with described main nail circumferentially by 120 °, uniform intervals arranges, described other three memory metals rod all mainly follows closely into 130 ° of angles with described, make described second umbrella shape regulator in opened condition and its umbrella point points to towards the second end of described main nail, and wherein, described second umbrella shape regulator is the same with described first umbrella shape regulator can be out of shape to be draw in or open mode at different temperature.Described second distance be selected such that described second umbrella shape regulator in human femoral head neck portion in opened condition time fix and support neck of femur cortex.
According to another aspect of the present disclosure, in above-mentioned head marrow nail, described umbrella shape stabilising arrangement also comprises the second umbrella shape regulator, wherein, described second umbrella shape regulator comprises three screws, described three screws are arranged in three the second inclined holes on the side of described main nail, there is second distance place in the direction that described three the second inclined holes are arranged on towards the first end of described main nail from described first inclined hole, described second distance is less than described first distance, the circumferentially uniform intervals arrangement by 120 ° at the described second distance place of described three the second inclined holes on the side of described main nail, wherein, the part at least from the end of its second end to described second inclined hole of described main nail is hollow, described three screws enter described main nail from the end of the second end of described main nail and pass from the side of described main nail via described three the second inclined holes, and described three screws all become 130 ° of angles with described main nail, make described second umbrella shape regulator in opened condition and its umbrella point points to towards the second end of described main nail.Described second distance be selected such that described second umbrella shape regulator in human femoral head neck portion in opened condition time fix and support neck of femur cortex.
According to further aspect of the present disclosure, in above-mentioned head marrow nail, described mobile jib has anterior arch radian, be suitable for inserting in femur total length marrow, and wherein, relatively make described main nail and described mobile jib be 130 ° of inclinations angle away from the mode of the first end of described mobile jib with the first end of described main nail.
The main umbrella shape stabilising arrangement nailed near its first end place is arranged on because head marrow nail of the present disclosure has, therefore, it is possible to have the fixing of enhancing and supporting role to the sclerite that femoral head and neck lease making resets, thus make the sclerite of femoral head neck part comparatively be not easy to occur movement or the rotation in direction, back and forth or left and right after a reset, and then the reduction of the fracture can be made more firm, and can effectively prevent main nail from passing from the head and neck cortex of femoral head neck sclerite or causing cutting to it thus.
Accompanying drawing explanation
Fig. 1 a is the schematic diagram of femoral intertrochanteric and/or subtrochanteric fracture.
Fig. 1 b is the close up fragmentary figure of femoral intertrochanteric and/or subtrochanteric fracture.
Fig. 2 a is the schematic diagram of the short head marrow nail of prior art.
Fig. 2 b is the schematic diagram of the elongated head marrow nail of prior art.
Fig. 3 is the schematic diagram comprising the head marrow nail of a umbrella shape regulator according to the disclosure first embodiment.
Fig. 4 is the schematic diagram comprising the head marrow nail of two umbrella shape regulators according to the disclosure second embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present disclosure is described.In all of the figs, the identical label of same or analogous parts represents.
Fig. 3 is the schematic diagram comprising the head marrow nail 300 of a umbrella shape regulator S1 according to the disclosure first embodiment.As shown in Figure 3, head marrow nail 300 comprises: mobile jib 301, and described mobile jib 301 comprises (i.e. close heart) the second end of (namely away from the heart) first end in distally and nearside; Femoral head neck fixture 303, is being fixedly linked near the nearside place of described mobile jib 301 and described mobile jib 301; And inter-locking screw 305, be fixedly linked near the distal side of described mobile jib 301 and described mobile jib 301.
Specifically, described femoral head neck fixture 303 comprises: main nail 310, and described main nail 310 is being fixedly connected with described mobile jib 301 near its distal side, and with described mobile jib 301 in an angle of inclination; And the first umbrella shape regulator S1, described first umbrella shape regulator S1 is arranged on the nearside place on described main nail 310, and is the central axis that described first umbrella shape regulator S1 opens or draws in the length direction of described main nail 310.
As shown in Figure 3, described main nail 310 is passed by the first inclined hole 312 of nearside on described mobile jib 301, makes described main nail 310 be fixedly connected with described mobile jib 301 in its distal side thus.Relatively make described main nail 310 and described mobile jib 301 in an inclination angle away from the mode in the distally of described mobile jib 301 with the nearside of described main nail 310.Preferably, according to the dissect physiology feature of human femur under loading, described inclination angle can be 130 °.
Especially, described first umbrella shape regulator S1 comprises three memory metal rods MD1, MD2, MD3.There is the first distance D1 place in direction towards the nearside of described main nail 310 on the side that described three memory metals rod MD1, MD2, MD3 are arranged on described main nail 310 from described first inclined hole 312.The described first distance D1 place of three ends on the side of described main nail 310 that described three memory metals rod MD1, MD2, MD3 are connected with described main nail 310 circumferentially by 120 °, uniform intervals arranges.Preferably, the mode that described three memory metals rod MD1, MD2, MD3 are connected with described main nail 310 can be weld.The angle that described three memory metals rod MD1, MD2, MD3 are predetermined with described main nail 310 one-tenth.Such as, described three memory metals rod MD1, MD2, MD3 can be identical with angle predetermined formed by described main nail 310, also can be different.Preferably, according to the dissect physiology feature of human femur under loading, described three memory metals rod MD1, MD2, MD3 all can become 130 ° of angles with described main nail 310, make described first umbrella shape regulator S1 in opened condition and the sharp nearside towards described main nail 310 of its umbrella points to.
Described three memory metals rod MD1, MD2, MD3 can select memory metal material known in the art to make.Such as, exemplarily but not there is any restricted effect, in clinical practice, before operation, first described first umbrella shape regulator S1 can be immersed in frozen water and reach predetermined a period of time.After treating that the temperature of described three memory metals rod MD1, MD2, MD3 drops to about 0 ° of frozen water, make described three memory metals rod MD1, MD2, MD3 distortion.Especially, make described three memory metals rod MD1, MD2, MD3 be deformed into the side being close to described main nail 310, so just make described first umbrella shape regulator S1 draw in completely.
Then, in operation process, after mobile jib 301 and main nail 310 are inserted human body according to priority, the temperature of described first umbrella shape regulator S1 can progressively rise, simultaneously, described three memory metals rod MD1, MD2, MD3 also progressively revert to original all with the shape at described main nail 310 one-tenth 130 ° of angles, finally, described first umbrella shape regulator S1 is opened.
In the present embodiment, preferably, described first distance D1 is 5-10mm, three free ends of three memory metal rods MD1, MD2, MD3 described in when described first umbrella shape regulator S1 opens can be made just in time directly fixing and supporting femoral head cortex.In some cases, if at least one in three free ends of described three memory metals rod MD1, MD2, MD3 fails just in time to contact and support resected femur scalp matter, then its shape as umbrella opened is in having the medullary substance body of certain stickiness and have the fixing of enhancing and supporting role to the sclerite of femoral head neck part wherein by it.
Fig. 4 is the schematic diagram comprising the head marrow nail 400 of two umbrella shape regulator S1 and S2 according to the disclosure second embodiment.As shown in Figure 4, the first umbrella shape regulator S1 of head marrow nail included by 400 can be just the same with the first umbrella shape regulator S1 shown in Fig. 3.Further, in the diagram, except described second umbrella shape regulator S2, remaining part and the configuration thereof of head marrow nail 400 also can be just the same with the corresponding component shown in Fig. 3.
Specifically, such as, as shown in Figure 4, head marrow follows closely 400 inter-locking screws 405 comprising mobile jib 401, the femoral head neck fixture 403 be fixedly connected with the nearside of mobile jib 401 and be fixedly connected with the distally of mobile jib 401.Described femoral head neck fixture 403 comprises main nail 410.At the nearside place of shown main nail 410, be disposed with the first umbrella shape regulator S1 and the second umbrella shape regulator S2.
Especially, as shown in Figure 4, described second umbrella shape regulator S2 comprises other three memory metals rod MD1 ', MD2 ', MD3 '.There is second distance D2 place in direction towards the nearside of described main nail 410 on the side that described other three memory metals rod MD1 ', MD2 ', MD3 ' are arranged on described main nail 410 from described first inclined hole 412.Described second distance D2 is less than described first distance D1.The described second distance D2 place of three ends on the side of described main nail 410 that described other three memory metals rod MD1 ', MD2 ', MD3 ' are connected with described main nail 410 circumferentially by 120 °, uniform intervals arranges.Preferably, the mode that described other three memory metals rod MD1 ', MD2 ', MD3 ' are connected with described main nail 410 is welded.The angle that described other three memory metals rod MD1 ', MD2 ', MD3 ' are predetermined with described main nail 410 one-tenth.Such as, described other three memory metals rod MD1 ', MD2 ', MD3 ' can be identical with angle predetermined formed by described main nail 410, also can difference.Preferably, according to the dissect physiology feature of human femur under loading, described other three memory metals rod MD1 ', MD2 ', MD3 ' all can become 130 ° of angles with described main nail 410, make described second umbrella shape regulator S2 in opened condition and its umbrella is sharp points to towards the distally of described main nail 410.
Described second umbrella shape regulator S2 equally with described first umbrella shape regulator S1 can be out of shape to be draw in or open mode at different temperature.Such as, described second umbrella shape regulator S2 first can be deformed into rounding state equally in frozen water, and progressively reverts to open mode after a period of time inserting in human body.Preferably, when described second umbrella shape regulator S2 opens, three free ends of described other three memory metals rod MD1 ', MD2 ', MD3 ' are just in time directly fixed and support neck of femur cortex.In some cases, if at least one in three free ends of described other three memory metals rod MD1 ', MD2 ', MD3 ' fails just in time to contact and support resected femur neck cortex, then its shape as umbrella opened is in having the medullary substance body of certain stickiness and have the fixing of enhancing and supporting role to the sclerite that femoral head and neck lease making resets wherein by it.
Or the second umbrella shape regulator S2 in Fig. 4 can be made up of memory metal rod unlike described first umbrella shape regulator S1.Such as, shown in same composition graphs 4, described second umbrella shape regulator S2 comprises three screws LD1, LD2, LD3.Described three screws LD1, LD2, LD3 are arranged in three the second inclined holes on the side of described main nail 410.There is second distance D2 place in the direction that described three the second inclined holes are arranged on towards the nearside of described main nail 410 from described first inclined hole 412.Described second distance D2 is less than described first distance D1.The circumferentially uniform intervals arrangement by 120 ° at the described second distance D2 place of described three the second inclined holes on the side of described main nail 410.This section at least from the end in its distally to described second inclined hole of described main nail 410 is hollow.Described three screws LD1, LD2, LD3 enter described main nail 410 from the end in the distally of described main nail 410 and pass via the side of described three the second inclined holes from described main nail 410.Preferably, according to the dissect physiology feature of human femur under loading, described three screws LD1, LD2, LD3 can all become 130 ° of angles with described main nail 410, make described second umbrella shape regulator S2 in opened condition and its umbrella point points to towards the distally of described main nail 410.
Preferably, in one embodiment, described three screws LD1, LD2, LD3 can be polished rod hobnail or bolt.
In addition, those of ordinary skill in the art are not difficult to expect according to practical application, described second inclined hole on described main nail 410 appropriately can be selected according to the actual size of patient's femoral head neck from the distance D2 of described first inclined hole 412, namely, can the distance that passes to heart direction from the first inclined hole 412 of the nearside of described mobile jib 401 of main nail 410 described in appropriate regulation, described other three memory metals rod MD1 ' is allowed when opening to make described second distance D2 be selected to can to make described second umbrella shape regulator S2, MD2 ', MD3 ' or described three screw LD1, LD2, three free ends of LD3 are directly fixed as much as possible and support neck of femur cortex.
In addition, in above-mentioned all embodiments, described mobile jib 301 or 401 has certain anterior arch radian, is applicable to femur anatomical physiology characteristic, thus it is relatively more smooth to be suitable for inserting the interior plug pin process that also can make of femur total length marrow, so just can be inserted into the femur condyle of below always.Just as shown in Figures 3 and 4, due to femur total length can be made so all to have Intramedullary nailing or protection, so the second fracture of old people's femur can be prevented to occur.
In addition, in clinical practice, described main nail 310 or 410 can be common lag screw.In one embodiment, main nail 310 or 410 can be replaced to screw blade, correspondingly memory metal rod is set on the both sides blade of screw blade.
Such as, in the surgical procedure of the Hip Fracture of such as femoral intertrochanteric and subtrochanteric fracture and so on, after fracture closed reduction, the head marrow nail 300 or 400 of inserting above-mentioned first embodiment or the second embodiment is fixed, and can adjust described main nail 310 or 410 from the first inclined hole 312 or 412 to the distance that heart direction passes according to the practical situation of fracture line.
Then, preferably, treat memory metal rod MD1, MD2, MD3 and MD1 ', MD2 ', MD3 ' rises with temperature and progressively returns in after the umbrella shape opened, or at memory metal rod MD1, MD2, MD3 returns in the umbrella shape opened and inserts three from the end in the distally of main nail 410 via three the second inclined holes and all becomes the screw LD1 at 130 ° of angles with main nail 410, LD2, after LD3, form two umbrella shape regulator S1 and S2 opened, strengthen the fixing of the sclerite that femoral head and neck lease making resets and supporting role thus, thus make femoral head neck sclerite comparatively be not easy to occur movement or the rotation in direction, back and forth or left and right after a reset, and then make the reduction of the fracture more firm.
According to above-described embodiment of the present disclosure, owing to directly to be fixed by umbrella shape regulator S1 and/or S2 in femoral head neck cortex and the contact impetus supported can reach four and/or seven, so each contact impetus is stressed relatively little, can effectively prevent the described main nail 310 or 410 for marrow nail 300 or 400 from passing or cutting femoral head neck part thus.
According to above-described embodiment, those skilled in the art are also not difficult to expect, the first umbrella shape regulator S1 of the present disclosure can have more than three memory metal rods, more preferably to strengthen the fixing of the sclerite that femoral head and neck lease making resets and supporting role.Equally, the second umbrella shape regulator S2 also can have more than three memory metals rod or screw, more preferably to strengthen the fixing of the sclerite that femoral head and neck lease making resets and supporting role.
In addition, according to actual needs, those skilled in the art are also not difficult to expect that head marrow of the present disclosure nail 300 or 400 also goes for the firm of the reduction of the fracture at other position in human body or animal body and healing.
Although the foregoing describe preferred embodiment of the present disclosure, the disclosure is not limited only to this.Those skilled in the art can carry out various change and change on basis described above.
The various change and the change that do not depart from spirit of the present invention all should drop within protection domain of the present disclosure.Protection domain of the present disclosure is limited by accompanying claims.
Claims (10)
1. a head marrow nail, is characterized in that, comprising:
Mobile jib, described mobile jib comprises first end and the second end;
Inter-locking screw, is being fixedly linked near the first end place of described mobile jib and described mobile jib;
Femoral head neck fixture, is being fixedly linked near the second end place of described mobile jib and described mobile jib;
Wherein, described femoral head neck fixture comprises:
Main nail, described main nail comprises first end and the second end, described main nail is passed by the first inclined hole of the second end near described mobile jib on described mobile jib, make described main nail be fixedly connected with described mobile jib at the second end place near described main nail thus, and be an inclination angle with described mobile jib; And
Umbrella shape stabilising arrangement, described umbrella shape stabilising arrangement is arranged on the first end place that described master nails on close described main nail, and is the central axis that described umbrella shape stabilising arrangement is opened or drawn in the length direction of described main nail.
2. as claimed in claim 1 marrow nail, wherein, described umbrella shape stabilising arrangement comprises the first umbrella shape regulator, wherein, described first umbrella shape regulator comprises at least three memory metal rods, there is the first distance in direction towards the first end of described main nail on the excellent side being arranged on described main nail of described at least three memory metals from described first inclined hole, the circumferentially uniform intervals of described first distance of at least three ends on the side of described main nail that described at least three memory metals rod is connected with described main nail arranges, described at least three memory metals rod and describedly mainly follow closely into predetermined angular, make described first umbrella shape regulator in opened condition and its umbrella point points to towards the first end of described main nail.
3. as claimed in claim 2 marrow nail, wherein, described first umbrella shape regulator comprises three memory metal rods, described first distance of three ends on the side of described main nail that described three memory metals rod is connected with described main nail circumferentially by 120 °, uniform intervals arranges, and described three memory metals rod all mainly follows closely into 130 ° of angles with described, make described first umbrella shape regulator in opened condition and the sharp first end towards described main nail of its umbrella points to.
4. as claimed in claim 3 marrow nail, wherein, described first umbrella shape regulator be dipped in frozen water reach predetermined a period of time after be deformable, make described three memory metal rods be deformed into thus and be close to described main nail, thus make described first umbrella shape regulator be rounding state, and wherein, risen with temperature by described three memory metals rod and progressively revert to and originally all mainly followed closely into the state at 130 ° of angles with described and finally revert in opened condition in described first umbrella shape regulator in rounding state after being placed into human body with described mobile jib together with described main nail.
5. as claimed in claim 4 marrow nail, wherein, described first distance is 5-10mm, make described first umbrella shape regulator in human femoral head neck portion in opened condition time fixing and supporting femoral head cortex.
6. as claimed in claim 2 or claim 3 marrow nail, wherein, described umbrella shape stabilising arrangement also comprises the second umbrella shape regulator, wherein, described second umbrella shape regulator comprises other three memory metal rods, there is second distance place in direction towards the first end of described main nail on the described excellent side being arranged on described main nail of other three memory metals from described first inclined hole, described second distance is less than described first distance, the described second distance place of three ends on the side of described main nail that described other three memory metals rod is connected with described main nail circumferentially by 120 °, uniform intervals arranges, described other three memory metals rod all mainly follows closely into 130 ° of angles with described, make described second umbrella shape regulator in opened condition and its umbrella point points to towards the second end of described main nail, and wherein, described second umbrella shape regulator is the same with described first umbrella shape regulator can be out of shape to be draw in or open mode at different temperature.
7. as claimed in claim 2 or claim 3 marrow nail, wherein, described umbrella shape stabilising arrangement also comprises the second umbrella shape regulator, wherein, described second umbrella shape regulator comprises three screws, described three screws are arranged in three the second inclined holes on the side of described main nail, there is second distance place in the direction that described three the second inclined holes are arranged on towards the first end of described main nail from described first inclined hole, described second distance is less than described first distance, the circumferentially uniform intervals arrangement by 120 ° at the described second distance place of described three the second inclined holes on the side of described main nail, wherein, the part at least from the end of its second end to described second inclined hole of described main nail is hollow, described three screws enter described main nail from the end of the second end of described main nail and pass from the side of described main nail via described three the second inclined holes, and described three screws all become 130 ° of angles with described main nail, make described second umbrella shape regulator in opened condition and its umbrella point points to towards the second end of described main nail.
8. as claimed in claim 6 marrow nail, wherein, described second distance be selected such that described second umbrella shape regulator in human femoral head neck portion in opened condition time fix and support neck of femur cortex.
9. as claimed in claim 7 marrow nail, wherein, described second distance be selected such that described second umbrella shape regulator in human femoral head neck portion in opened condition time fix and support neck of femur cortex.
10. as claimed in claim 1 marrow nail, wherein, described mobile jib has anterior arch radian, is suitable for inserting in femur total length marrow, and wherein, relatively make described main nail and described mobile jib be 130 ° of inclinations angle away from the mode of the first end of described mobile jib with the first end of described main nail.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700854.6U CN204337023U (en) | 2014-11-20 | 2014-11-20 | Head marrow nail |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420700854.6U CN204337023U (en) | 2014-11-20 | 2014-11-20 | Head marrow nail |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105250054A (en) * | 2015-09-15 | 2016-01-20 | 浙江科惠医疗器械股份有限公司 | Hip joint femoral stem with distributed bearing rivet |
| CN111616783A (en) * | 2020-06-22 | 2020-09-04 | 李开南 | Fixing device for in-situ reduction of fracture block in joint |
| CN111643173A (en) * | 2020-05-14 | 2020-09-11 | 北京贝思达生物技术有限公司 | Novel head medullary nail for preventing head and neck bone block from retroverted |
| CN115645018A (en) * | 2022-10-09 | 2023-01-31 | 中国人民解放军空军军医大学 | Intramedullary lengthening device for neck of femur |
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2014
- 2014-11-20 CN CN201420700854.6U patent/CN204337023U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105250054A (en) * | 2015-09-15 | 2016-01-20 | 浙江科惠医疗器械股份有限公司 | Hip joint femoral stem with distributed bearing rivet |
| CN111643173A (en) * | 2020-05-14 | 2020-09-11 | 北京贝思达生物技术有限公司 | Novel head medullary nail for preventing head and neck bone block from retroverted |
| CN111616783A (en) * | 2020-06-22 | 2020-09-04 | 李开南 | Fixing device for in-situ reduction of fracture block in joint |
| CN115645018A (en) * | 2022-10-09 | 2023-01-31 | 中国人民解放军空军军医大学 | Intramedullary lengthening device for neck of femur |
| CN115645018B (en) * | 2022-10-09 | 2024-04-16 | 中国人民解放军空军军医大学 | Femoral neck intramedullary extension device |
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