CN214857356U - Hollow nail for improving femoral head blood circulation - Google Patents
Hollow nail for improving femoral head blood circulation Download PDFInfo
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- CN214857356U CN214857356U CN202120253591.9U CN202120253591U CN214857356U CN 214857356 U CN214857356 U CN 214857356U CN 202120253591 U CN202120253591 U CN 202120253591U CN 214857356 U CN214857356 U CN 214857356U
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Abstract
The utility model provides a hollow nail for improving femoral head blood circulation, which relates to the technical field of medical instruments. The hollow nail for improving the blood circulation of the femoral head comprises a nail body, a mandrel, a driving piece and an umbrella-shaped structure; the outer wall of the nail body is provided with external threads; the mandrel is provided with a guide pin hole; an annular cavity is formed in the nail body, the top of the annular cavity is an opening, a plurality of pore channels are formed in the outer wall of the nail body, and the pore channels are communicated with the annular cavity; the nail body is internally provided with a shaft hole, the mandrel and the driving piece are inserted in the shaft hole, the driving piece is sleeved on the mandrel, one end of the umbrella-shaped structure is hinged on the mandrel, and the other end of the umbrella-shaped structure is hinged on the driving piece; a first absorbable piece is arranged in the pore passage, and a second absorbable piece used for shielding the opening is arranged on the umbrella-shaped structure. Achieves the technical effect of improving the blood circulation of the necrotic femoral head.
Description
Technical Field
The utility model relates to the technical field of medical equipment, particularly, relate to a hollow nail for improving femoral head blood circulation.
Background
The aseptic necrosis course of the femoral head comprises a necrosis period, a disintegration period, a reconstruction period and a plastic period, and before the necrotic femoral head is completely reconstructed, most children may have femoral head necrosis and collapse, which causes femoral neck deformity, hip varus deformity, unequal length of both lower limbs, osteoarthritis and the like in early stage. The current treatment modes for the disease mainly comprise conservative treatment, such as weight-bearing avoidance, pain relief, brace treatment and the like; and surgical treatments such as plaster of paris, varus osteotomy, pelvic osteotomy to increase the containment of the acetabulum with the femoral head. However, neither conservative treatment nor surgical treatment can improve the blood circulation of the necrotic femoral head, and thus can not change the natural course of femoral head necrosis and reduce the risk of collapse of femoral head necrosis.
The existing treatment means cannot improve the blood circulation of the necrotic femoral head.
Therefore, it is an important technical problem to be solved by those skilled in the art to provide a cannulated nail for improving blood circulation of femoral head capable of improving blood circulation of necrotic femoral head.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hollow nail for improving femoral head blood circulation to alleviate the technical problem that can't improve necrotic femoral head blood circulation among the prior art.
In a first aspect, an embodiment of the present invention provides a cannulated nail for improving femoral head blood circulation, including a nail body, a mandrel, an umbrella structure and a driving member for driving the umbrella structure;
the outer wall of the nail body is provided with an external thread;
the mandrel is provided with a guide pin hole;
an annular cavity is formed in the nail body, the top of the annular cavity is provided with an opening, the outer wall of the nail body is provided with a plurality of pore channels, and the pore channels are communicated with the annular cavity;
the nail body is internally provided with a shaft hole, the mandrel and the driving piece are inserted into the shaft hole, the driving piece is sleeved on the mandrel, one end of the umbrella-shaped structure is hinged on the mandrel, and the other end of the umbrella-shaped structure is hinged on the driving piece;
a first absorbable piece is arranged in the pore passage, and a second absorbable piece used for shielding the opening is arranged on the umbrella-shaped structure.
With reference to the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the driving member includes a sleeve and an adapter ring;
the sleeve is in threaded connection with the shaft hole, and the mandrel is in threaded connection with the sleeve;
the sleeve is abutted with the adapter ring;
one end of the adapter ring, which is far away from the sleeve, is hinged with the umbrella-shaped structure.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an annular groove is formed in an outer wall of the adapter ring, and a protruding ring adapted to the annular groove is disposed at a top of the sleeve;
the annular groove is connected with the convex ring in a sliding mode.
In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the adapter ring is fixedly provided with a first connection seat for being connected to the umbrella-shaped structure in an articulated manner.
In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the sleeve is kept away from one end of the adapter ring is provided with an inner hexagonal groove.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the umbrella structure includes a first connecting rod and a second connecting rod;
one end of the first connecting rod is hinged with the top of the mandrel, the other end of the first connecting rod is hinged with the second connecting rod, and one end of the second connecting rod, which is far away from the first connecting rod, is hinged with the first connecting seat;
the top of the mandrel is provided with a second connecting seat hinged with the first connecting rod;
an absorbable plate is disposed on the first link.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the absorbable plate is made of tricalcium phosphate.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the absorbable plate is made of polylactic acid.
In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the end of the core shaft away from the umbrella-shaped structure is provided with an inner hexagonal groove.
In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an inner hexagonal groove is formed in one end of the nail body, which is away from the umbrella-shaped structure.
Has the advantages that:
the utility model provides a hollow nail for improving femoral head blood circulation, which comprises a nail body, a mandrel, an umbrella-shaped structure and a driving piece for driving the umbrella-shaped structure; the outer wall of the nail body is provided with external threads; the mandrel is provided with a guide pin hole; an annular cavity is formed in the nail body, the top of the annular cavity is an opening, a plurality of pore channels are formed in the outer wall of the nail body, and the pore channels are communicated with the annular cavity; the nail body is internally provided with a shaft hole, the mandrel and the driving piece are inserted in the shaft hole, the driving piece is sleeved on the mandrel, one end of the umbrella-shaped structure is hinged on the mandrel, and the other end of the umbrella-shaped structure is hinged on the driving piece; a first absorbable piece is arranged in the pore passage, and a second absorbable piece used for shielding the opening is arranged on the umbrella-shaped structure.
When the nail is used specifically, preoperative medical staff can measure the height of necrotic epiphysis according to X-ray, CT or MRI, and select proper size and length of the nail body to ensure that the umbrella-shaped structure on the nail body can completely enter the femoral epiphysis; when in operation, medical staff can drive in a guide pin under perspective, the electric drill expands the marrow to a proximal growth plate of the femoral neck, then the nail body is screwed into necrotic epiphysis through the femoral neck, and in the screwing process of the nail body, under the action of pressure difference between the femoral neck marrow and a ring cavity on the nail body, a first absorbable part filled in a pore channel of the nail body can partially fall off and enter the ring cavity of the nail body, so that the femoral neck marrow enters the ring cavity of the nail body under the action of the pressure difference; then ensuring that the umbrella-shaped structure of the nail body completely enters necrotic epiphysis under perspective; then the medical staff driving piece drives one end of the umbrella-shaped structure to move, so that the umbrella-shaped structure at the top of the nail body can be gradually opened, and a temporary space is formed at the necrotic epiphysis along with the opening of the umbrella-shaped structure, so that the marrow in the annular cavity of the nail body and the first absorbable piece and the second absorbable piece can enter the necrotic epiphysis; meanwhile, more pore canals are opened in the nail body, and more bone marrow enters the annular cavity of the nail body and enters necrotic epiphysis; bone marrow mesenchymal stem cells, growth factors and the like in the bone marrow are gradually differentiated to osteoblasts in necrotic epiphysis, and the second absorbable part is taken as a bracket to gradually form osteocytes and bone tissues and crawl to replace the original necrotic tissues. Thereby improving the blood circulation of the necrotic femoral head of the patient and improving the recovery probability of the patient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a hollow nail for improving blood circulation of femoral head according to an embodiment of the present invention when not in use;
figure 2 is a cross-sectional view of a cannulated nail for improving blood transport of the femoral head provided by an embodiment of the present invention when not in use (wherein the second absorbable member is not shown);
fig. 3 is a schematic view of a sleeve and an adapter ring for improving blood circulation of a femoral head according to an embodiment of the present invention;
fig. 4 is a schematic view of a cannulated nail for improving blood circulation of the femoral head according to an embodiment of the present invention in use;
fig. 5 is a cross-sectional view of a cannulated nail for improving blood circulation of the femoral head according to an embodiment of the present invention when not in use.
Icon:
100-a nail body; 110-ring cavity; 111-opening; 120-a tunnel; 130-shaft hole;
200-a mandrel; 210-guide pin holes; 220-a second connecting seat;
300-a driver; 310-a sleeve; 311-convex ring; 320-a transfer ring; 321-a ring groove; 322-first connection seat;
400-umbrella structure; 410-a first link; 420-a second link;
500-second absorbent member.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to fig. 1, 2, 3, 4 and 5, an embodiment of the present invention provides a cannulated nail for improving femoral head blood circulation, comprising a nail body 100, a mandrel 200, a driving member 300 and an umbrella structure 400; the outer wall of the nail body 100 is provided with external threads; the mandrel 200 is provided with a guide pin hole 210; an annular cavity 110 is formed in the nail body 100, an opening 111 is formed in the top of the annular cavity 110, a plurality of pore channels 120 are formed in the outer wall of the nail body 100, and the pore channels 120 are communicated with the annular cavity 110; the nail body 100 is internally provided with a shaft hole 130, the mandrel 200 and the driving piece 300 are both inserted in the shaft hole 130, the driving piece 300 is sleeved on the mandrel 200, one end of the umbrella-shaped structure 400 is hinged on the mandrel 200, and the other end is hinged on the driving piece 300; the first absorbable member is provided in the duct 120, and the second absorbable member 500 for blocking the opening 111 is provided on the umbrella structure 400.
When the nail is used specifically, preoperative medical staff can measure the height of necrotic epiphysis according to X-ray, CT or MRI, and select the proper size and length of the nail body 100 to ensure that the umbrella-shaped structure 400 on the nail body 100 can completely enter the femoral epiphysis; when in operation, a medical staff can drive a guide pin under perspective, electrically drill and expand marrow and pass through a growth plate to a necrotic epiphysis position, then screw the nail body 100 into the femoral neck, and in the process of screwing the nail body 100, under the action of the pressure difference between the femoral neck marrow and the annular cavity 110 on the nail body 100, the filled first absorbable component in the pore passage 120 of the nail body 100 can partially fall off and enter the annular cavity 110 of the nail body 100, so that the femoral neck marrow enters the annular cavity 110 of the nail body 100 under the action of the pressure difference; then ensuring that the umbrella-shaped structure 400 of the nail body 100 completely enters the necrotic epiphysis in perspective; then the medical staff driving member 300 drives one end of the umbrella structure 400 to move, so that the umbrella structure 400 at the top of the nail body 100 can be gradually opened, and a temporary space is formed at the necrotic epiphysis along with the opening of the umbrella structure 400, so that the bone marrow in the annular cavity 110 of the nail body 100 and the first and second absorbable members 500 can enter the necrotic epiphysis; at the same time, the shank 100 will have more of the bore 120 open and more bone marrow will enter the annular cavity 110 of the shank 100 and enter the necrotic epiphysis; bone mesenchymal stem cells, growth factors and the like in the bone marrow are gradually differentiated into osteoblasts in necrotic epiphysis, and the second absorbable member 500 is used as a scaffold to gradually form osteocytes and bone tissues to crawl to replace the original necrotic tissues. Thereby improving the blood circulation of the necrotic femoral head of the patient and improving the recovery probability of the patient.
Wherein the outer walls of the second absorbent members 500 are provided with external threads, and when the umbrella structure 400 is contracted, the external threads of the outer walls of the plurality of second absorbent members 500 can be combined together, so that the external threads of the outer walls of the plurality of second absorbent members 500 are combined together. Moreover, the top of the umbrella-shaped structure 400 is provided with a tip, and the outer wall of the tip is provided with an external thread.
Referring to fig. 1-5, in an alternative to the present embodiment, the driver 300 includes a sleeve 310 and an adaptor ring 320; the sleeve 310 is in threaded connection with the shaft hole 130, and the mandrel 200 is in threaded connection with the sleeve 310; sleeve 310 abuts adapter ring 320; the end of the adaptor ring 320 remote from the sleeve 310 is hinged to the umbrella structure 400.
Specifically, the medical staff drives the sleeve 310 to rotate through the screwdriver of the sleeve 310, and the screwdriver of the mandrel 200 can pass through the screwdriver of the sleeve 310 to be connected with the mandrel 200, so that the mandrel 200 cannot move along with the sleeve 310 when the medical staff rotates the sleeve 310. So that when the driving sleeve 310 is used to stretch the umbrella structure 400, the medical staff will not rotate the umbrella structure 400, thereby reducing the injury to the patient.
Specifically, an inner hexagonal groove is formed in one end of the sleeve 310, which is far away from the adapter ring 320, and the sleeve 310 can be driven to rotate by a hexagonal screwdriver.
Specifically, an inner hexagonal groove is formed in one end of the mandrel 200, which is far away from the umbrella-shaped structure 400, and the mandrel 200 can be driven to rotate through a hexagonal screwdriver.
Specifically, an inner hexagonal groove is formed in one end of the nail body 100, which is far away from the umbrella-shaped structure 400, and the nail body 100 can be driven to rotate through a hexagonal screwdriver.
Referring to fig. 1 to 5, in an alternative of this embodiment, an annular groove 321 is formed in an outer wall of the adapter ring 320, and a convex ring 311 adapted to the annular groove 321 is disposed at a top of the sleeve 310; the ring groove 321 is slidably connected with the protruding ring 311.
Specifically, the annular groove 321 is formed in the adapter ring 320, the convex ring 311 is arranged on the sleeve 310, and the adapter ring 320 can move up and down synchronously with the sleeve 310 through the matching of the annular groove 321 and the convex ring 311, and the adapter ring 320 can rotate relative to the sleeve 310, so that when the sleeve 310 rotates up or down, the adapter ring 320 only completes the up and down actions.
Referring to fig. 1-5, in an alternative embodiment, a first connecting seat 322 for hinging with the umbrella structure 400 is fixedly arranged on the adapter ring 320.
Specifically, the first connection seat 322 is disposed on the adapter ring 320, so that the worker can assemble the umbrella structure 400 conveniently.
Referring to fig. 1-5, in an alternative version of this embodiment, an umbrella structure 400 includes a first link 410 and a second link 420; one end of the first link 410 is hinged with the top of the mandrel 200, the other end is hinged with the second link 420, and one end of the second link 420 far away from the first link 410 is hinged with the first connecting seat 322; the top of the mandrel 200 is provided with a second connecting seat 220 hinged with the first connecting rod 410; an absorbable plate is provided on the first link 410.
Specifically, the first link 410 and the second link 420 are arranged to enable the umbrella structure 400 to perform the folding and unfolding actions.
Specifically, after the medical staff screws the nail body 100 into the femur of the patient by using the large-sized screwdriver, the small-sized screwdriver with the shaft hole 130 is connected with the sleeve 310, another small-sized screwdriver is then inserted through the shaft hole 130, and coupled to the spindle 200, then the medical staff rotates the screwdriver connected with the sleeve 310, at this time, the sleeve 310 can rotate and rise in the shaft hole 130 of the nail body 100, the mandrel 200 can not rotate with the sleeve 310 under the fixation of the screwdriver, at this time, the sleeve 310 will rise relative to the mandrel 200, so that the sleeve 310 can push the adapter ring 320 to ascend, the adapter ring 320 pushes the first connector holder 322 to ascend, thereby pushing the second link 420 of the umbrella structure 400 to rise, thereby driving the first link 410 to swing upwards, thereby allowing the umbrella structure 400 to be unfolded so that the second absorbable member 500 provided on the first link 410 can support the femoral head necrotic part.
In an alternative embodiment, the absorbable plate is made of tricalcium phosphate.
Specifically, the absorbable plate can be made of tricalcium phosphate.
In an alternative embodiment, the absorbable plate is made of polylactic acid.
Specifically, the absorbable plate can be made of polylactic acid.
In addition, those skilled in the art can also use other materials to make the absorbable plate, as long as the absorbable plate can be absorbed by the human body after operation and will not cause damage to the human body, and further description is omitted here.
The hollow nail for improving the blood circulation of the femoral head provided by the embodiment can be used in the necrosis stage of aseptic necrosis of the femoral head, the femoral head epiphysis in the necrosis stage is soft in necrotic tissue structure, and the umbrella-shaped structure 400 at the top of the nail body 100 can be better opened. Can achieve the purposes of early intervention and treatment and avoid collapse and flattening of the femoral head.
The application method of the hollow nail for improving femoral head blood circulation provided by the embodiment comprises the following steps: step 1, measuring the height of necrotic epiphyses according to X-ray, CT or MRI before surgery, selecting a proper size and length of the nail body 100, and ensuring that the umbrella-shaped structure 400 of the nail body 100 can completely enter the femoral epiphyses.
And 2, taking a small incision on the outer side of the proximal femur, driving a guide pin under perspective, and electrically drilling and reaming the marrow to a growth plate at the proximal end of the bone neck.
And 3, selecting a large-size screw to screw the nail body 100 into necrotic epiphysis through the femoral neck, wherein in the screwing process, under the action of the pressure difference between the femoral neck bone marrow and the annular cavity 110 of the nail body 100, the filled absorbable material of the pore passage 120 of the nail body 100 can partially fall into the annular cavity 110 of the nail body 100, and the femoral neck bone marrow enters the annular cavity 110 of the nail body 100 under the action of the pressure difference.
The diameter and distribution density of the pore channels 120 of the nail body 100 need to satisfy the following conditions: on one hand, the diameter and distribution density of the holes 120 cannot be too large to affect the strength of the screw body 100; on the other hand, it is also desirable to ensure that there is a sufficient distribution and diameter size of the channels 120 to allow the bone marrow to smoothly enter the annular cavity 110 of the shank 100 and into the necrotic epiphysis.
And 4, threading the nail body 100 into the necrotic epiphysis through the growth plate, threading the nail body 100 into the epiphysis as much as possible without breaking the femoral head, and ensuring that the umbrella-shaped structure 400 on the nail body 100 completely enters the necrotic epiphysis under perspective.
And 5, screwing the sleeve 310 by using a small-sized screwdriver, and fixing the mandrel 200 by using another screwdriver, so as to gradually open the umbrella-shaped structure 400 at the top of the nail body 100. At this time, as the bone marrow gradually enters the annular chamber 110, the pressure difference between the inside and the outside of the umbrella-shaped structure 400 at the top of the nail body 100 is reduced, and the resistance to screwing the sleeve 310 is significantly reduced. With the umbrella structure 400 open, a temporary space is created within the necrotic epiphysis, allowing bone marrow and absorbable material within the annulus 110 to enter the necrotic epiphysis; at the same time, the shank 100 will have more of the bore 120 open and more bone marrow will enter the screw's annular cavity 110 and enter the necrotic epiphysis.
And 6, gradually differentiating the bone mesenchymal stem cells, the growth factors and the like in the bone marrow to osteoblasts in necrotic epiphysis, gradually forming the osteoblasts and bone tissues by taking the second absorbable member 500 as a bracket, and crawling to replace the original necrotic tissues.
Wherein the annular cavity 110 of the shank 100 can continue to draw femoral neck marrow into the necrotic epiphysis, the umbrella structure 400 can increase the distribution of bone marrow at the necrotic epiphysis and support the height of the necrotic epiphysis, and the second absorbable member 500 serves as a scaffold for stem cell crawling alternatives.
And 7, periodically rechecking the X-ray film after the operation, and taking out the metal part of the hollow nail for improving the blood circulation of the femoral head according to the absorption condition and the epiphysis repair condition of the umbrella-shaped structure 400.
In conclusion, the hollow nail for improving blood circulation of the femoral head provided by the embodiment can intervene aseptic necrosis of the femoral head in an early stage, accelerate reconstruction of the necrotic femoral head and maintain the height of the necrotic femoral head better.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. A cannulated nail for improving blood circulation in the femoral head, comprising: the nail comprises a nail body (100), a mandrel (200), an umbrella-shaped structure (400) and a driving piece (300) for driving the umbrella-shaped structure (400);
the outer wall of the nail body (100) is provided with an external thread;
a guide pin hole (210) is formed in the mandrel (200);
an annular cavity (110) is formed in the nail body (100), an opening (111) is formed in the top of the annular cavity (110), a plurality of pore channels (120) are formed in the outer wall of the nail body (100), and the pore channels (120) are communicated with the annular cavity (110);
a shaft hole (130) is formed in the nail body (100), the mandrel (200) and the driving piece (300) are inserted into the shaft hole (130), the driving piece (300) is sleeved on the mandrel (200), one end of the umbrella-shaped structure (400) is hinged to the mandrel (200), and the other end of the umbrella-shaped structure is hinged to the driving piece (300);
a first absorbable piece is arranged in the duct (120), and a second absorbable piece (500) used for shielding the opening (111) is arranged on the umbrella-shaped structure (400).
2. A cannulated nail for improving femoral head blood flow according to claim 1, wherein the driver (300) comprises a sleeve (310) and an adaptor ring (320);
the sleeve (310) is in threaded connection with the shaft hole (130), and the mandrel (200) is in threaded connection with the sleeve (310);
the sleeve (310) abuts the adapter ring (320);
one end of the adapter ring (320) far away from the sleeve (310) is hinged with the umbrella-shaped structure (400).
3. The cannulated nail for improving femoral head blood circulation according to claim 2, wherein an annular groove (321) is opened on the outer wall of the adapter ring (320), and a convex ring (311) matched with the annular groove (321) is arranged on the top of the sleeve (310);
the annular groove (321) is connected with the convex ring (311) in a sliding mode.
4. A cannulated nail for improving femoral head blood transport according to claim 3, wherein a first connection seat (322) for hinging with the umbrella structure (400) is fixedly arranged on the adaptor ring (320).
5. The cannulated nail for improving femoral head blood circulation according to claim 4, wherein an end of the sleeve (310) distal to the adaptor ring (320) is provided with a hexagonal socket.
6. The cannulated nail for improving blood circulation of the femoral head according to claim 4, wherein the umbrella structure (400) comprises a first link (410) and a second link (420);
one end of the first connecting rod (410) is hinged with the top of the mandrel (200), the other end of the first connecting rod is hinged with the second connecting rod (420), and one end, far away from the first connecting rod (410), of the second connecting rod (420) is hinged with the first connecting seat (322);
the top of the mandrel (200) is provided with a second connecting seat (220) hinged with the first connecting rod (410);
an absorbable plate is disposed on the first link (410).
7. The cannulated nail for improving blood circulation of the femoral head according to claim 6, wherein the absorbable plate is made of tricalcium phosphate.
8. The cannulated nail for improving blood circulation of the femoral head according to claim 6, wherein the absorbable plate is made of polylactic acid.
9. The cannulated nail for improving femoral head blood transport according to any of claims 1 to 8, wherein the end of the mandrel (200) distal to the umbrella structure (400) is provided with a hexagonal socket.
10. The cannulated nail for improving femoral head blood circulation according to any of claims 1 to 8, wherein the end of the nail body (100) away from the umbrella-shaped structure (400) is provided with a hexagonal socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120253591.9U CN214857356U (en) | 2021-01-28 | 2021-01-28 | Hollow nail for improving femoral head blood circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120253591.9U CN214857356U (en) | 2021-01-28 | 2021-01-28 | Hollow nail for improving femoral head blood circulation |
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| Publication Number | Publication Date |
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| CN214857356U true CN214857356U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120253591.9U Active CN214857356U (en) | 2021-01-28 | 2021-01-28 | Hollow nail for improving femoral head blood circulation |
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| CN (1) | CN214857356U (en) |
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2021
- 2021-01-28 CN CN202120253591.9U patent/CN214857356U/en active Active
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