TWI530271B - Support device for femoral head - Google Patents

Description

Femoral head support device

The present invention relates to a support device for a femoral head, and more particularly to a cavern that can be placed in a femoral head and excavated outwardly to form an effective support device for the interior of the femoral head.

The cause of avascular necrosis of the femoral head of the human body may be a traumatic blood vessel rupture, or a patient who has been using steroids for a long time due to an immune disease (such as rheumatoid arthritis or systemic lupus), or because of alcohol or blood. Diseases, etc.; when the symptoms of avascular necrosis of the femoral head occur, the bone tissue inside the femoral head cannot obtain the nutrients transported by the blood and cause necrosis. At this time, the cartilage joint surface of the outermost layer of the femoral head will be unsupported. The collapse, so the patient will feel pain and discomfort.

At present, patients with avascular necrosis of the femoral head usually receive physical therapy first. If the condition worsens, they can be treated with reconstructed bone tissue or replaced with artificial femoral head surgery.

When the physical therapy fails, the treatment of avascular necrosis of the femoral head is still based on the reconstruction of bone tissue. The operation is performed on the lateral side of the femur, through the femoral neck to the femoral head. A tunnel is drilled inside to extend into a excavator to remove the necrotic bone tissue and fill it with bone powder or autologous bone marrow. In order to allow blood to flow into the filled bone powder or autologous bone marrow, the current Surgery, often a porous column is buried in the tunnel, straight In the bone powder or autologous bone marrow filled in, the bone powder or autologous bone marrow filled in the blood can obtain the nutrients needed for sufficient blood supply, and promote the growth of bone tissue, so that the newly grown bone tissue can support the femoral head. The outermost cartilage articular surface improves the pain of the patient.

However, in the above surgery, the bone powder or autologous bone marrow that has been filled is in a soft state before it is connected to the new bone tissue, and cannot effectively support the cartilage joint surface of the femoral head. After the pressure, there is still the possibility of a fall, leading to surgery failure, and there is a need for improvement.

In view of this, the inventors of the present invention have studied and disclosed the support device of the femoral head shown in the present invention.

The object of the present invention is to provide a support device for a femoral head, comprising: a first member; a second member; a plurality of support members respectively pivoted between the first and second members; and an operating rod group, The utility model comprises a positioning rod and a pushing seat, wherein a top end of the positioning rod is used for engaging the first member, and the pushing seat is mounted on the positioning rod and axially displaceable along the positioning rod, so that the pushing seat is a top portion is provided for pushing the bottom end of each of the supporting members or the second member to narrow the distance between the first and second members, and forcing each of the supporting members to open outward; Indwelling in the cavern excavated in the femoral head, and after each of the supporting members is opened outward, and filled with bone powder or autologous bone marrow, constitutes a supporting structure filled with bone powder or autologous bone marrow inside the femoral head. To increase the compressive strength of the cartilage articular surface of the femoral head.

The support device for a femoral head according to the present invention, wherein the first member is provided with a plurality of hanging holes; a top end of each of the supporting members forms a mounting ear, and the hanging ear is hooked to one of the first members. Corresponding to the hanging holes, the top ends of the supporting members can be rotated according to the hanging holes.

The support device for a femoral head according to the present invention, wherein the second member is formed with a hoop that penetrates the bottom end of each of the support members so that the bottom end of each of the support members can be rotated according to the hoop.

The support device for a femoral head according to the present invention, wherein each of the support members can be a single plate or pivotally connected by a plurality of plates.

The support device for a femoral head according to the present invention, wherein each of the plates comprises a main plate portion, that is, a primary plate portion, so that when the support members are outwardly opened, each of the sub-plate portions is a main plate adjacent to another plate body. Partial overlap.

The support device for a femoral head according to the present invention, wherein the push seat and the positioning rod are screw holes and a screw provided with corresponding mating, so that the push seat is screwed on the positioning rod.

The support device for a femoral head according to the present invention, wherein the top end of the positioning rod is locked to the first member or the top end of the positioning rod is integrally formed with the first member.

The support device of the femoral head disclosed by the invention can be opened in the bone of the femoral head, and the bone powder or the patient's autologous bone marrow can be filled inside the femoral head to form a strong embedded in the bone powder or the autologous bone marrow. The scaffold is like a steel bar in the mixed soil, so that the bone cartilage surface of the outermost part of the femoral head can be effectively supported before the bone tissue or autologous bone marrow is filled to complete the reconstruction, to avoid collapse, and to improve the reconstruction of bone tissue. The probability of success, and the novelty and creativity of the invention.

The desirable entities of the present invention can be clarified by the following description and the accompanying drawings.

(10) ‧‧‧ first component

(11)‧‧‧ hanging holes

(20) ‧‧‧Second components

(30) (30') ‧ ‧ support elements

(31)‧‧‧ hang ears

(32)‧‧‧Axis hole

(33a) (33b) ‧ ‧ plates

(331)‧‧‧ Main Board

(332) ‧ ‧ times plate holes

(40) (40’) ‧ ‧ operating rod set

(41) (41’) ‧ ‧ positioning rod

(41a)‧‧‧Segment

(411)‧‧‧ screw holes

(412)‧‧‧ Filling holes

(42) (42’) ‧‧‧ push

(42a) ‧‧‧ screw holes

(420)‧‧‧Shoulder

(421)‧‧‧ Screw section

(422)‧‧‧Filling holes

(423) ‧‧ ‧ sales guide

(43)‧‧‧ Guide sleeve

(431)‧‧‧ Guide groove

(B) ‧ ‧ bone powder or autologous bone marrow

(F) ‧ ‧ femur

(F1) ‧‧‧ Tunnel

(H)‧‧‧ Femoral head

(H1)‧‧‧ Cave

(P)‧‧‧Perforated rods

(T)‧‧‧ Tools

The first drawing is an exploded perspective view of the first embodiment of the present invention; the second drawing is a perspective view of the embodiment shown in the first figure after the assembly is completed; and the third drawing is a partial sectional structure of the second drawing 3-3 direction. Figure 4 is a schematic view showing the support members from the third figure; the fifth figure is a perspective view of the support member of the present invention; the sixth figure is disclosed as a single Schematic diagram of the support member of the plate body; seventh diagram: a schematic diagram of relatively compressing the two ends of the support member from the sixth diagram; eighth diagram: an exploded perspective view of the second embodiment of the present invention; FIG. 11 is a perspective view showing a partial cross-sectional structure in the AA direction of the ninth diagram; FIG. 11 is a schematic view showing the support members outwardly from the ninth diagram; Twelve diagrams showing a schematic view of the present invention placed in a cave defined by the femoral head; Figure 13 is a schematic view showing the support members of the support member from the twelfth diagram; The three figures are completed by filling in the bone powder or the autologous bone. And FIG XV: schematic view showing a barrel of the adapter of the present invention.

Referring to the first to eleventh drawings, the present invention relates to a support device for a femoral head, comprising: a first member 10; a second member 20; and a plurality of support members 30 respectively pivoted Between the first and second members 10 and 20, after the first and second members 10 and 20 are tightened, each of the supporting members 30 can be opened outward; and an operating rod group 40 includes a positioning rod 41 and a Pushing the seat 42, wherein the top end of the positioning rod 41 is used to engage the first member 10, and the push seat 42 is loaded The positioning rod 41 is disposed on the positioning rod 41 and is axially displaceable along the positioning rod 41. The top end of the pushing base 42 is provided with a shoulder portion 420 for pushing the bottom end of each of the supporting member 30 or the second member 20. To narrow the distance between the first and second members 10, 20. Accordingly, as shown in the fourteenth and fifteenth figures, the present invention can be indwelled in the pre-excavated cavity H1 in the femoral head H, and the support member 30 is outwardly opened and filled with bone meal or After the autologous bone marrow B, the present invention constitutes a support structure in which the bone powder or the autologous bone marrow B is filled inside the femoral head H to increase the compressive strength of the cartilage joint surface of the femoral head H.

As shown in the first to fifth figures, the support device for a femoral head according to the present invention, wherein the first member 10 is provided with a plurality of hanging holes 11; a top end of each of the supporting members 30 forms a mounting ear 31. The mounting ear 31 is hooked in one of the first members 10 corresponding to the hanging hole 11. Of course, the first member 10 can also be a collar that penetrates the top end of each of the support members 30 so that each of the support members 30 can rotate according to the collar.

The support device for a femoral head according to the present invention, wherein the second member 20 is formed with a collar that penetrates the shaft hole 32 at the bottom end of each of the support members 30 so that the bottom end of each of the support members 30 can be The second member 20 rotates.

The support device for a femoral head according to the present invention, wherein each of the support members 30 is pivotally connected by a plurality of plates, as shown in the first, third, and fourth figures, each of the support members 30 being at least two plates 33a, 33b. Each of the support members 30 can be pivotally connected to the at least one connecting member between the two plates 33a and 33b, so that each of the supporting members 30 can be bent at a more bending point when bent. Or, as shown in the sixth figure, each of the supporting members 30' is a single plate body. When the opposite ends of the supporting members 30' are relatively compressed as shown by the arrow in the seventh figure, the supporting members can be driven. Element 30' is outwardly curved and flared outwardly.

a support device for a femoral head according to the present invention as shown in the first, second and fifth figures, Each of the plate bodies 33a, 33b includes a main plate portion 331 and a primary plate portion 332. When the support members 30 are outwardly opened, each of the sub-plate portions 332 is a main plate adjacent to the other other plate bodies 33a, 33b. The portions 331 partially overlap to form a larger support surface.

The support device for a femoral head according to the present invention, wherein the positioning rod 41 of the operation rod set 40 and the push base 42 are provided with screw segments 421 and screw holes 411 which cooperate with each other to relatively rotate the positioning rod 41 and After pushing the seat 42, the pusher 42 can be axially displaced along the positioning rod 41; when the pusher 42 is displaced toward the first member 10, each of the supporting members 30 can be pushed up, so that the supporting members 30 are directed to When the pusher 42 is driven away from the first member 10, the pusher 42 can be removed from the positioning rod 41.

The support device for a femoral head according to the present invention, wherein the top end of the positioning rod 41 is locked or pivotally connected to the first member 10, or the top end of the positioning rod 41 is integrally formed with the first member, and the present invention does not Self-limited.

As shown in the first and third figures, the support device for the femoral head according to the present invention, wherein the positioning rod 41 and the push base 42 of the operating rod set 40 are respectively provided with a filling hole 412, 422 for making the bone powder or the filling hole 412. And 422 are connected to each other and connected to the outside world. If the bone powder or the autologous bone marrow B is passed through the filling holes 412 and 422, the filling hole 422 of the pushing seat 42 and the filling hole 412 of the positioning rod 41 are filled in the femoral head. In the cave H1 reserved by H, each of the expanded support members 30 is buried in the bone powder or the autologous bone marrow B.

As shown in the eighth to eleventh drawings, the support device for a femoral head according to the present invention, wherein the operation lever set 40' includes a positioning rod 41', a pusher 42' and a guiding sleeve 43, The top end of the positioning rod 41' is pivotally mounted on the first member 10, and the bottom portion thereof forms a screw segment 41a. The push block 42' is axially provided with a screw hole 42a screwed to the positioning rod 41. 'The screw segment 41a And a guide pin 423 is protruded radially from the outer edge of the pusher 42'; the guiding sleeve 43 is oppositely sleeved outside the pusher 42', and the upper end of the guiding sleeve 43 A guiding groove 431 is provided to the ground to allow the guide pin 423 of the pusher 42' to slide relative to each other. After the positioning rod 41' is rotated, the pusher 42' can be relatively axially displaced along the positioning rod 41'. As shown in FIG. 11, the supporting members 30 are relatively compressed to make each support. Element 30 is flared or bent outward.

The support device for the femoral head disclosed in the present invention, in application, as shown in the twelfth figure, the support device of the femoral head disclosed in the present invention can be first clamped by the tool T, and the tunnel F1 is placed along the femur F. Entering the cavity H1 inside the femoral head H, and then the tool T can drive the pusher 42 relative to each other to relatively compress the two ends of the supporting member 30, as shown in FIG. The element 30 is flared outward, and then, as shown in FIG. 14, the bone powder or the autologous bone marrow B is filled in the tunnel F1 and the cavity H1 at the end of the tunnel, or as in the fifteenth diagram, in the cave H1. After filling the bone powder or the autologous bone marrow B, a metal rod or a porous rod P is inserted to complete the reconstruction operation; the porous rod P described above can provide the bone powder or the autologous blood flowing smoothly into the hole H1. Bone marrow to supply the necessary nutrients to re-expand bone tissue.

Since the present invention is implanted inside the femoral head H, if the patient has to replace the entire artificial femoral head due to recurrence of the lesion or other reasons in the future, the artificial femoral head H can be replaced after the resection of the femoral neck, so It hinders the progress of other treatments in the future.

The support device for the femoral head disclosed in the present invention can be embedded in the bone powder or the autologous bone marrow B after being filled in the femoral head H, just after the bone powder or the autologous bone marrow B is filled inside the femoral head H. The strong scaffold is like the steel in the mixed soil, so that the bone cartilage surface of the outermost part of the femoral head H can be effectively supported to avoid collapse after the bone powder or autologous bone marrow B is filled to reconstruct the new bone tissue. The success rate of reconstructing bone tissue surgery, and the novelty of the invention Sex and creative.

The structure and shape of the present invention can be modified and applied without departing from the spirit and scope of the present invention, and the present invention is not limited to the above embodiments.

(10) ‧‧‧ first component

(20) ‧‧‧Second components

(30)‧‧‧Support elements

(40)‧‧‧Operation rod set

(41)‧‧‧ Positioning rod

(42) ‧‧‧ push seat

(B) ‧ ‧ bone powder or autologous bone marrow

(F) ‧ ‧ femur

(F1) ‧‧‧ Tunnel

(H)‧‧‧ Femoral head

(H1)‧‧‧ Cave

Claims (9)

A support device for a femoral head includes: a first member; a second member; a plurality of support members pivotally mounted between the first and second members; and a lever group including a positioning rod and a pusher The top end of the positioning rod is configured to engage the first member, and the push rod and the positioning rod are provided with a screw hole and a screw that cooperate with each other, so that the push rod is screwed on the positioning rod along the positioning rod The axial displacement is such that a top portion of the push seat is provided with a shoulder for pushing the bottom ends of each of the supporting members or the second member to narrow the distance between the first and second members, forcing the supporting members to Open outside. The support device of the femoral head according to claim 1, wherein the first member is provided with a plurality of hanging holes; a top end of each of the supporting members forms a mounting ear, and the hanging ear is hooked to the first member. One corresponds to the hanging hole. A support device for a femoral head according to claim 1, wherein the second member is formed with a collar that penetrates into a shaft hole at a bottom end of each of the support members. A support device for a femoral head according to claim 1, wherein each of the support members is a single plate. The support device for a femoral head according to claim 1, wherein each of the support members is pivotally connected by a plurality of plates. The support device for a femoral head according to claim 4, wherein each of the plate systems comprises a main plate portion and a primary plate portion, wherein when the support members are outwardly opened, each of the sub-plate portions is adjacent to another plate body. The main board parts partially overlap. The support device of the femoral head according to claim 1, wherein the top end of the positioning rod is pivotally connected to the first member. The support device for a femoral head according to claim 1, wherein a top end of the positioning rod is integrally formed with the first member. The support device for a femoral head according to claim 1, wherein the operation lever set includes a positioning rod, a push rod and a guiding sleeve, wherein a top end of the positioning rod is pivotally mounted on the first member, The bottom portion is formed with a screw segment; the push block is axially provided with a screw hole, screwed on the screw segment of the positioning rod, and a guide pin is radially protruded from the outer edge of the push seat; The guiding sleeve is opposite to the sliding sleeve, and a guiding groove is axially disposed on the guiding sleeve to allow the guiding pin of the pushing seat to slide relative to the inside.