CN212205880U

CN212205880U - Proximal femoral intramedullary nail checking fixture

Info

Publication number: CN212205880U
Application number: CN202021293897.9U
Authority: CN
Inventors: 叶树; 谈进; 严迪恒; 居志杰; 甄伍凡; 李若城; 严忠良
Original assignee: Changzhou Dazon Medical Devices Co ltd
Current assignee: Changzhou Dazon Medical Devices Co ltd
Priority date: 2020-07-04
Filing date: 2020-07-04
Publication date: 2020-12-22
Anticipated expiration: 2030-07-04

Abstract

The utility model relates to an utensil is examined to thighbone near-end intramedullary nail uses in the technical field that the intramedullary nail detected, and it includes the base, sets up the test table on the base and is used for the clamping piece of centre gripping intramedullary nail, and the intramedullary nail is located the test table, sets up first inspection hole and the second inspection hole that corresponds respectively with inclined hole and lock nail hole on the test table, and first inspection hole and second inspection hole are pegged graft respectively and are had first measuring staff and second measuring staff. The utility model has the effect of improving the detection efficiency of the intramedullary nail.

Description

Proximal femoral intramedullary nail checking fixture

Technical Field

The utility model belongs to the technical field of the technique that the intramedullary nail detected and specifically relates to an utensil is examined to thighbone near-end intramedullary nail.

Background

Femoral intertrochanteric fractures are common in middle-aged and elderly patients, and are usually fixed by proximal femoral intramedullary nails. The PFNA is a new and improved PFN (proximal femoral intramedullary nail) system, on one hand, inherits the advantages of the original PFN and has the same biomechanical characteristics, and on the other hand, is innovative in specific design, so that the fixation is more effective and the operation is simpler.

As shown in fig. 5, the proximal intramedullary nail of femur comprises a main nail 4, an inclined hole 41 and a locking nail hole 42 which are arranged on the main nail 4, and a central hole 43, a screw hole 44, a first counter bore 45 and a second counter bore 46 which are arranged from inside to outside and are arranged at the proximal end of the main nail 4, wherein the proximal end of the main nail 4 is provided with a notch 47.

In the actual processing process, after the intramedullary nail is processed into a finished product, the inclined hole, the locking nail hole and the relative position of the inclined hole and the locking nail hole need to be detected, but the traditional detection method generally utilizes three coordinates to carry out measurement, but the three-coordinate measurement steps are complicated (starting, scanning, coordinates, dotting and the like), the requirement on the proficiency of detection personnel is high, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art existence, the utility model aims at providing an utensil is examined to thighbone near-end intramedullary nail, it has the effect that improves intramedullary nail detection efficiency.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the proximal femoral intramedullary nail detection tool comprises a base, a detection table arranged on the base and a clamping piece used for clamping the intramedullary nail, wherein the intramedullary nail is positioned in the detection table, a first detection hole and a second detection hole which respectively correspond to an inclined hole and a locking nail hole are formed in the detection table, and a first measuring rod and a second measuring rod are respectively inserted into the first detection hole and the second detection hole.

Through adopting above-mentioned technical scheme, during the detection, the operator presss from both sides tight fixedly with the clamping piece earlier with the intramedullary nail, insert first measuring staff and second measuring staff respectively in first inspection hole and the second inspection hole, first measuring staff and second measuring staff slide down under the dead weight, if first measuring staff and second measuring staff can freely insert inclined hole and lock nail downthehole then explain the size qualified respectively, and realized the detection to inclined hole and lock nail hole relative position simultaneously, convenient and fast has improved the detection efficiency of intramedullary nail.

The present invention may be further configured in a preferred embodiment as: the clamping piece comprises a support and a core column, the support is connected to the base, a through hole is formed in the side wall of the support, the core column is inserted into the through hole, a middle column is arranged at one end of the core column, a thread section is arranged at the other end of the core column, and the diameter of the middle column is larger than that of the core column.

By adopting the technical scheme, the operator supports the near end of the intramedullary nail on the side wall of the support, and then screws the middle column to enable the thread section of the core column to be in threaded connection in the screw hole, so that the near end of the intramedullary nail can be fixed by being tightly supported with the support, and the intramedullary nail fixing device is convenient and fast.

The present invention may be further configured in a preferred embodiment as: one side of the support towards the detection table is provided with a positioning ring matched with the second counter bore, and the positioning ring is provided with a positioning block clamped with the opening.

By adopting the technical scheme, the positioning function on the intramedullary nail is realized by the matching of the positioning block and the notch, the debugging time of an operator is saved, the position precision of the intramedullary nail is ensured, and the detection speed is accelerated.

The present invention may be further configured in a preferred embodiment as: the support is in threaded connection with the base through a first countersunk screw, the base is provided with a positioning column, the support is provided with a positioning hole, and the positioning column is inserted into the positioning hole.

By adopting the technical scheme, the support is detachably connected with the base, and when the support is seriously abraded, an operator can directly replace the support; the positioning effect on the support is achieved through the matching of the positioning columns and the positioning holes, and the relative position accuracy of the support and the detection platform is guaranteed.

The present invention may be further configured in a preferred embodiment as: and the detection table is provided with a plurality of second detection holes.

By adopting the technical scheme, the plurality of second detection holes correspond to the nail locking holes at different positions, so that the application range of the detection tool to intramedullary nails with different specifications is enlarged.

The present invention may be further configured in a preferred embodiment as: the detection platform is U-shaped and has a horizontal opening.

By adopting the technical scheme, the detection platform adopts an open shape structure, and convenience is provided for an operator to observe the detection process.

The present invention may be further configured in a preferred embodiment as: the detection table is connected with the base through a second countersunk screw.

Through adopting above-mentioned technical scheme, examine test table and adopt the screw connection mode, loading and unloading are convenient, can dismantle alone, reduce the wasting of resources.

The present invention may be further configured in a preferred embodiment as: the side wall of the detection table is provided with a light hole.

Through adopting above-mentioned technical scheme, during the detection, the operator is placing a light source at the test table side, then whether observe the light that can its correspond the hole from first detection and second inspection hole, tentatively judge the position in inclined hole and lock nail hole, and a plurality of deviations are too big then need not to carry out the detection of first measuring staff or second measuring staff, have saved the time.

The present invention may be further configured in a preferred embodiment as: the end part of the first measuring rod is provided with a locking column, and a sunk groove for embedding the locking column is formed in the orifice of the first detection hole of the detection platform.

Through adopting above-mentioned technical scheme, when the locking post inserts heavy inslot, first measuring staff is restricted, has reduced that first measuring staff falls into and has taken out inconvenient condition emergence in the first detecting hole, has played the effect of the first measuring staff length of control, and the locking post has guaranteed the smoothness on first measuring staff surface as the handheld part of operator simultaneously, has reduced the possibility that first measuring staff is blocked.

The present invention may be further configured in a preferred embodiment as: the middle column is provided with a clamping groove for inserting the core column, the core column is connected with the middle column through a pin, and one end of the middle column, far away from the core column, is provided with a knob.

By adopting the technical scheme, the knob facilitates an operator to screw the middle column, the middle column and the core column are in pin connection, the operator can conveniently adjust the depth of the core column inserted into the clamping groove before fixing, and the connection of the thread section of the core column is ensured.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the rapid detection of the inclined hole, the locking hole and the relative position of the inclined hole and the locking hole on the intramedullary nail is realized, and the detection efficiency is improved;

2. the clamping piece component and the detection table can be independently disassembled, so that the assembly is convenient, the replacement is quick, and the resource waste is reduced; the stop column not only ensures the smooth finish of the surface of the first measuring rod, but also provides convenience for the insertion and the extraction of the first measuring rod.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Fig. 2 is a schematic structural diagram of a positioning ring and a positioning block according to the present embodiment.

Fig. 3 is a schematic structural diagram for embodying the pin of the present embodiment.

Fig. 4 is a schematic structural diagram of the first countersunk screw and the positioning post in this embodiment.

Fig. 5 is a schematic diagram for embodying the prior art.

In the figure, 1, a base; 11. a detection table; 111. a first detection hole; 112. a second detection hole; 12. a first measuring bar; 13. a second measuring bar; 14. a first countersunk screw; 15. a positioning column; 16. positioning holes; 17. a second countersunk screw; 18. a light-transmitting hole; 2. a clamping member; 21. a support; 22. a stem; 221. a threaded segment; 23. a through hole; 24. a middle column; 25. a positioning ring; 251. positioning blocks; 26. a card slot; 27. a pin; 271. a pin hole; 28. a knob; 31. a stopper post; 32. sinking a groove; 33. scale lines; 4. a main nail; 41. an inclined hole; 42. a lock pin hole; 43. a central bore; 44. a screw hole; 45. a first counterbore; 46. a second counterbore; 47. and (6) opening.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 1, for the utility model discloses a utensil is examined to thighbone near-end intramedullary nail, including base 1, be connected with on the base 1 and examine test table 11 and be used for the clamping piece 2 of centre gripping intramedullary nail, examine test table 11 and clamping piece 2 relative distribution.

As shown in fig. 1 and 2, the clamping member 2 includes a support 21 and a stem 22, the support 21 is fixed on the base 1 by a first countersunk screw 14, a through hole 23 is formed in a side wall of the support 21, a positioning ring 25 is arranged at an opening of the through hole 23 on one side of the support 21 facing the detection table 11, an outer diameter of the positioning ring 25 is the same as an inner diameter of the second countersunk hole 46, a positioning block 251 corresponding to the notch 47 is arranged on the positioning ring 25, the stem 22 is inserted into the through hole 23, one end of the stem 22 is connected with a middle column 24, the other end of the stem 22 is provided with a threaded section 221, a diameter of the middle column 24 is larger than that of the. During clamping, an operator inserts the threaded section 221 of the stem 22 into the proximal end of the intramedullary nail and inserts the positioning ring 25 into the second counter bore 46, the positioning block 251 is inserted into the notch 47, the knob 28 is rotated to drive the threaded section 221 of the stem 22 to be screwed into the screw hole 44 until the end of the middle column 24 abuts against the support 21, so that the proximal end of the intramedullary nail abuts against the side wall of the support 21, and the intramedullary nail is positioned and fixed.

As shown in fig. 1 and 3, a slot 26 for inserting the stem 22 is formed on an end surface of the middle column 24, pin holes 271 are formed in the middle column 24 and the stem 22, pins 27 are inserted into the pin holes 271, the pins 27 penetrate through the middle column 24 and the stem 22, and the pins 27 are tightly matched with the pin holes 271, so that the stem 22 and the middle column 24 are fixed; during actual assembly, an operator can adjust the insertion depth of the stem 22 into the slot 26 by selecting the position of the pin hole 271 on the stem 22, so as to ensure that the end of the middle column 24 is abutted against the support 21 when the threaded section 221 of the stem 22 is screwed into the screw hole 44, thereby fixing the intramedullary nail.

As shown in fig. 4, the number of the first countersunk head screws 14 is two, two positioning holes 16 are formed in the support 21, the two positioning holes 16 and the two first countersunk head screws 14 are distributed at four corners of the lower end of the support 21, the two positioning holes 16 and the two first countersunk head screws 14 are arranged diagonally, two positioning columns 15 are arranged on the base 1, the two positioning columns 15 are respectively inserted into the two positioning holes 16 to position the support 21, and meanwhile, the oblique angle distribution mode of the first countersunk head screws 14 and the positioning holes 16 is beneficial to ensuring the uniformity of stress of the support 21 during actual assembly.

As shown in fig. 2, the detection table 11 is fixed on the base 1 by a second countersunk screw 17, the section of the detection table 11 is U-shaped, the opening of the detection table is horizontally oriented, and two light holes 18 are formed in the side wall of the detection table 11.

As shown in fig. 1, a first detection hole 111 and a second detection hole 112 are formed in the detection table 11, when the intramedullary nail is positioned and clamped, a section of the intramedullary nail with the inclined hole 41 and the locking nail hole 42 is located in the opening of the detection table 11, the first detection hole 111 corresponds to the inclined hole 41, the second detection hole 112 corresponds to the locking nail hole 42, the hole diameters of the first detection hole 111 and the second detection hole 112 and the relative positions of the two are in accordance with design requirements, a first measuring rod 12 and a second measuring rod 13 are respectively inserted into the first detection hole 111 and the second detection hole 112, one end of the first measuring rod 12 located outside the detection table 11 is provided with a coaxially distributed stop column 31, the diameter of the stop column 31 is larger than that of the first measuring rod 12, and the detection table 11 is provided with a sink groove 32 at the orifice of the first detection hole 111.

As shown in fig. 4, when the operator loosens the first measuring rod 12 and the second measuring rod 13, the first measuring rod 12 and the second measuring rod 13 fall under the self-weight, if the first measuring rod 12 smoothly passes through the inclined hole 41 until the stop column 31 is inserted into the sinking groove 32, and the second measuring rod 13 smoothly passes through the lock pin hole 42, the sizes of the apertures of the inclined hole 41 and the lock pin hole 42 and the relative positions of the two apertures meet the requirements, and if the first measuring rod 12 or the second measuring rod 13 is blocked, the requirements are not met, the operation is simple, fast and convenient, the operation is simple, the detection of the apertures of the inclined hole 41 and the lock pin hole 42 and the relative positions of the inclined hole 41 and the lock pin hole 42 is simultaneously realized, the detection speed is increased, and the detection efficiency is improved.

As shown in fig. 4, a plurality of second detecting holes 112 are arranged along the length direction of the detecting table 11 to adapt to the positions of the locking nail holes 42 on the intramedullary nails with different specifications, and the detecting table 11 is provided with scale marks 33 corresponding to the second detecting holes 112, so as to provide intuitive judgment for an operator to select the appropriate second detecting hole 112.

The implementation principle of the embodiment is as follows: during detection, an operator places a light source, such as a desk lamp and an LED lamp, on one side of the detection table 11, light is made to irradiate towards the light-transmitting hole 18, the knob 28 is rotated, the intramedullary nail is positioned and fixed, the inclined hole 41 and the nail locking hole 42 are respectively observed through the first detection hole 111 and the detection hole, if bright light is observed, the inclined hole 41 or the nail locking hole 42 is indicated to preliminarily meet requirements, the operator inserts the first measuring rod 12 and the second measuring rod 13 to perform detection on the next step, the bright light cannot be obviously observed through the inclined holes 41 and the nail locking hole 42, the occurrence of position deviation of the inclined holes 41 and the nail locking hole 42 is indicated, the intramedullary nail is detached, the detection on the next step is not needed, and time is saved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a utensil is examined to thighbone near-end intramedullary nail which characterized in that: including base (1), set up on base (1) examine test table (11) and be used for the clamping piece (2) of centre gripping intramedullary nail, the intramedullary nail is located examine test table (11), examine test table (11) and set up first inspection hole (111) and second inspection hole (112) that correspond respectively with inclined hole (41) and lock nail hole (42), first inspection hole (111) and second inspection hole (112) are pegged graft respectively and are had first measuring staff (12) and second measuring staff (13).

2. The proximal femoral intramedullary nail gauge of claim 1, wherein: the clamping piece (2) comprises a support (21) and a core column (22), the support (21) is connected to the base (1), a through hole (23) is formed in the side wall of the support (21), the core column (22) is inserted into the through hole (23), one end of the core column (22) is provided with a middle column (24), the other end of the core column is provided with a thread section (221), and the diameter of the middle column (24) is larger than that of the core column (22).

3. The proximal femoral intramedullary nail gauge of claim 2, wherein: one side of the support (21) facing the detection table (11) is provided with a positioning ring (25) matched with the second counter bore (46), and the positioning ring (25) is provided with a positioning block (251) clamped with the notch (47).

4. The proximal femoral intramedullary nail gauge of claim 2 or 3, wherein: the support (21) is in threaded connection with the base (1) through a first countersunk screw (14), the base (1) is provided with a positioning column (15), the support (21) is provided with a positioning hole (16), and the positioning column (15) is inserted into the positioning hole (16).

5. The proximal femoral intramedullary nail gauge of claim 1, wherein: the detection table (11) is provided with a plurality of second detection holes (112).

6. The proximal femoral intramedullary nail gauge of claim 1 or 5, wherein: the detection table (11) is U-shaped and has a horizontal opening.

7. The proximal femoral intramedullary nail gauge of claim 6, wherein: the detection table (11) is connected with the base (1) through a second countersunk head screw (17).

8. The proximal femoral intramedullary nail gauge of claim 7, wherein: the side wall of the detection table (11) is provided with a light hole (18).

9. The proximal femoral intramedullary nail gauge of claim 6, wherein: the end part of the first measuring rod (12) is provided with a stop column (31), and the detection table (11) is provided with a sinking groove (32) for embedding the stop column (31) at the orifice of the first detection hole (111).

10. The proximal femoral intramedullary nail gauge of claim 2, wherein: the middle column (24) is provided with a clamping groove (26) for inserting the core column (22), the core column (22) is connected with the middle column (24) through a pin (27), and one end, far away from the core column (22), of the middle column (24) is provided with a knob (28).