CN217853256U - Femoral neck positioning device - Google Patents

Abstract

The utility model discloses a thighbone neck positioner, include: the device comprises two clamping pieces, a rotating shaft, a guide rod, a guider and a scale rod, wherein the two clamping pieces are rotatably connected; the clamping piece is hinged through a rotating shaft; the guide rod is arranged on the rotating shaft and is fixedly connected with the rotating shaft, and the rear end of the guide rod is positioned in an angle formed by the rear ends of the two clamping pieces; the guider is arranged on the rotating shaft in a tubular shape and is detachably connected with the rotating shaft; the scale rod comprises a scale and a bearing piece, the bearing piece can slide on the scale, and scales are arranged on the scale. In the utility model, the clamping piece moves around the rotating shaft to clamp the femur, so as to position the sagittal plane of the femur; the double-sleeve device is provided with two sleeves, one sleeve is sleeved on the guide rod, and the other sleeve is sleeved on the external positioning guide pin, so that the femoral neck shaft angle can be conveniently positioned; the anteversion angle is convenient to position and the operation quality is ensured by measuring the downward moving distance of the guider along the scale rod.

Description

Femoral neck positioning device

Technical Field

The utility model relates to the field of medical equipment, in particular to femoral neck positioner.

Background

For patients with femoral neck fracture and who need to perform proximal femur osteotomy, internal fixation of the proximal femur, such as a hollow nail and a steel plate, is often required, wherein an important operation step is to position the femoral neck, then drive in a key first guide pin, and then smoothly perform internal fixation of the steel plate or the hollow nail. The currently adopted femoral neck positioning mode is as follows: the operator can change the angle of hip joint and C arm or G arm according to the perspective of C arm or G arm in operation, and adjust until the position of guide pin is satisfied, the position of guide pin is not accurate enough, and the position of guide pin needs to be positioned by repeated perspective in operation, thereby generating X-ray radiation and influencing the health of patient, operator and surrounding personnel. Meanwhile, the difference of the operator and the operation state leads to the great difference of the operation duration and the perspective amount and even the operation effect.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, the utility model provides a femoral neck positioner, the technical scheme who adopts as follows:

the utility model provides a femoral neck positioner, include: the clamping parts are arranged in two numbers, and the two clamping parts are rotationally connected with each other; the clamping piece is hinged through the rotating shaft; the guide rod is arranged on the rotating shaft, the guide rod is fixedly connected with the rotating shaft, and the rear end of the guide rod is positioned in an angle formed by the rear ends of the two clamping pieces; the guider is tubular and arranged on the rotating shaft, and the guider is detachably connected with the rotating shaft; the scale rod comprises a scale and a bearing part, the bearing part can slide on the scale, the guide rod and the guider can be arranged on the bearing part, and scales are arranged on the scale.

In some embodiments of the present invention, the straight line of the guide rod is two angular bisectors formed by the rear ends of the clamping members.

The utility model discloses an in some embodiments, the guide bar with be threaded connection between the pivot, the guide bar front end is provided with the external screw thread, be provided with corresponding internal thread in the pivot.

The utility model discloses an in some embodiments, be provided with the slide rail on the scale, be provided with the slider on the bearing piece, the slider set up in the slide rail.

In some embodiments of the present invention, an elastic member is disposed on the rotating shaft, a connecting hole is disposed on the elastic member, and the elastic member is connected to the guider.

In some embodiments of the present invention, the guide member is provided with a connecting groove at one end thereof, and the connecting groove corresponds to the connecting hole.

In some embodiments of the utility model, the scale pole includes the base, the scale set up in on the base.

The utility model provides a double-sleeve device for cooperate foretell thighbone neck positioner to use, include:

the device comprises a base, a first fixing piece and a second fixing piece, wherein a cavity is arranged on the base;

the number of the sleeves is two, the outer side wall of each sleeve is connected with the corresponding cavity in a sliding mode, and at least one sleeve can move along the corresponding cavity;

the base is provided with scales, and the scales are arranged along the extending direction of the cavity.

In some embodiments of the present invention, a protrusion is disposed on the outer sidewall of the sleeve, the protrusion is slidably connected to the cavity, and the protrusion is detachably connected to the sleeve.

In some embodiments of the present invention, the base includes a plurality of bases, each of which are stacked.

The embodiment of the utility model has the following beneficial effect at least: in the utility model, the clamping piece moves around the rotating shaft to clamp the femur, so as to position the sagittal plane of the femur; the double-sleeve device is provided with two sleeves, one sleeve is sleeved on the guide rod, and the other sleeve is sleeved on the in-vitro positioning guide pin, so that the femoral neck shaft angle can be conveniently positioned; the anteversion angle is convenient to position by measuring the downward moving distance of the guider along the scale rod, and the operation quality is ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the femoral neck positioning device of the present invention;

FIG. 2 is a schematic structural view of the shaft of the femoral neck positioning device of the present invention;

FIG. 3 is a schematic structural view of a ruler rod in the femoral neck positioning device of the present invention;

FIG. 4 is a schematic structural view of the double-sleeve device of the present invention;

fig. 5 is a top view of the dual sleeve device of the present invention;

fig. 6 is a schematic structural view of a sleeve in the double-sleeve device of the present invention.

Reference numerals: 10. a clamping member; 11. a rotating shaft; 12. a guide bar; 13. a guide; 14. an elastic member; 15. a support member; 16. a base; 21. a base; 23. a sleeve; 24. and (4) a protrusion.

Detailed Description

This section will describe in detail embodiments of the invention, examples of which are illustrated in the accompanying drawings, in conjunction with fig. 1 to 6, in which like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings, it is only for convenience of description and simplicity of description, and it is not intended to 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. The features defined as "first" and "second" are used for distinguishing feature names rather than having special meanings, and further, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a femoral neck positioner, femoral neck positioner include holder 10, pivot 11, guide bar 12, director 13, scale pole, and holder 10 roughly forms to the strip, and holder 10 is provided with two, adopts swivelling joint between two holders 10, and the degree of opening and shutting between holder 10 can be adjusted through the rotation. When the patient is in a supine position, the patella of the affected limb is upward, the greater trochanter of the femur and the external condyle of the femur of the affected limb are firstly found, a midline similar to the outer side of the femur is found by using the midpoints of the greater trochanter and the external condyle, the upper edge of the neck of the femur is positioned by an external guide pin under the perspective of the front part of the femur, and the projection of the external guide pin on the midline is cut towards the far end. The anterior end of the femoral neck positioning device is inserted through the incision and the anterior and posterior edges of the proximal lateral side of the femur are clamped by the anterior end of the clamping member 10 for positioning.

The two clamping members 10 are hinged through the rotating shaft 11, and when the rotating shaft 11 is connected with the clamping members 10, a certain distance needs to be reserved between the two clamping members 10.

In some examples, a torsion spring is arranged on the rotating shaft, two sides of the torsion spring are respectively connected with the two clamping pieces 10, the front ends of the clamping pieces 10 tend to be close to each other through the force exerted by the torsion spring, and under the condition that the clamping pieces 10 clamp the femur, a certain pressure can be kept on the bone surface by the clamping pieces 10, so that the clamping pieces 10 are prevented from sliding.

The guide rod 12 is arranged between the clamping pieces 10, the guide rod 12 is fixedly connected to the rotating shaft 11, and when the middle point, the cervical shaft angle and the anteversion angle of the sagittal plane of the outer side of the femur are positioned, the guide rod 12 is required to be accurately positioned. The orientation of the guide rod 12 is required to pass through the center of rotation of the holder 10, while during adjustment of the femoral neck positioning device, one end of the guide rod 12 is located within the angle formed by the rear end of the holder 10 and the center of rotation.

The guider 13 is tubular, the guider 13 is arranged on the rotating shaft 11, and the guider 13 is detachably connected with the rotating shaft 11. In use, the guide pin is driven into the femur through the guide 13, the guide 13 being used to define the direction in which the guide pin is driven. It will be appreciated that the shape of the inner wall of guide 13 is required to facilitate the passage of the guide pin and the adjustment of the guide pin, and that the shape of the inner wall of guide 13 is cylindrical.

The scale rod comprises a scale and a supporting piece 15, the supporting piece 15 is used for placing the guide rod 12 and the guider 13, when the angle is driven into the guide pin in adjustment, the offset angle is converted into the offset distance to accurately measure, the scale rod is used for measuring the offset distance, and scales are arranged on the scale. When the anteverted angle location is carried out to the guide pin of beating in, one piece of guide pin that has the scale is beaten into to the cortex of bone position to the level at first, simultaneously, places scale pole base in the bed surface, guarantees that the scale is vertical, reads out the distance of cortex of bone to scale pole on the guide pin. The distance the rear end of the guide 13 needs to be moved down is obtained from the anteversion angle measured preoperatively. The support piece 15 can slide on the scale, the distance from the support piece 15 to the required downward movement is adjusted, the support piece 15 drives the guide 13 to perform the same downward movement, the positioning of the anteverted angle is completed, and then the guide pin in the guide 13 is further driven into the femur.

Specifically, the support 15 is plate-shaped, and a space for placing the guide rod 12 and the guide 13 is provided on the support 15, so that the ends of the guide rod 12 and the guide 13 can be stably placed on the support 15 when the front rake positioning is performed.

In some instances, it is desirable to ensure that guide rod 12 is positioned at the bisector of the angle formed at the posterior end of holder 10, and that holder 10, when holder 10 is gripping the femur, is oriented at the midpoint of the lateral sagittal plane of the femur to facilitate positioning. In order to ensure accurate positioning, when the middle point of the sagittal plane of the outer side of the femur is positioned, the guide rod 12 needs to be kept horizontal, the tail end of the guide rod 12 is provided with a through hole, the direction of the through hole is vertical to the axial direction of the guide rod 12, and the shape of the inner wall of the through hole corresponds to the shape of the cross section of the scale. During the use, insert the scale in the through-hole, keep the scale vertical, install base 16 with the bottom of scale again, base 16 sets up on the bed surface, has guaranteed the vertical of scale, and then has guaranteed the level of guide bar 12. Specifically, in order to prevent the scale from still translating or rotating relative to the guide rod 12 after the guide rod 12 is connected with the scale, the cross section of the through hole on the guide rod 12 is set to be rectangular, and the cross section of the scale is also set to be corresponding rectangular.

In some examples, the guide rod 12 is detachably connected with the rotating shaft 11, the guide rod 12 is provided with an external thread at a position connected with the rotating shaft 11, the rotating shaft 11 is provided with an internal thread, and the detachable connection is realized through the threaded connection.

In some examples, during anteversion positioning, a guide pin with scale is first driven to contact cortical bone only, the distance from cortical bone to the staff of the scale is read through the scale, and the distance that the guide pin with scale needs to move downwards at the intersection with the scale is obtained from the pre-measured anteversion angle. The guider 13 is detached from the rotating shaft 11, and the position where the guide pin with scales is contacted with cortical bone is taken as the shaft to rotate, so that the corresponding downward moving distance is reached at the position of the scale rod, and the positioning is completed. Because the guide 13 is always positioned on the supporting piece 15 in the downward moving process, the downward moving of the guide 13 is completed through the downward moving of the supporting piece 15, and the whole downward moving process is ensured to stably reach the designated scale.

In some examples, in order to ensure that the downward movement process of the support 15 is stable and impact is avoided, a slide rail is arranged on the scale, a slide block is arranged on the support 15, and the slide block moves in the slide rail according to a slide rail path, so that the use is convenient.

In some examples, the shaft 11 is provided with an elastic member 14, and the guide 13 is detachably connected with the elastic member 14. The elastic member 14 is provided with a connecting hole, and the guide 13 is connected with the elastic member 14 through the connecting hole, it can be understood that the connecting hole is a through hole, so that the guide pin can smoothly pass through the guide 13 and the elastic member 14 to reach the affected part.

In some examples, the end of the guide 13 connected to the elastic member 14 is provided with a connecting groove corresponding to the connecting hole, and when the guide 13 is mounted or dismounted on the elastic member 14, the elastic member 14 is subjected to an external force, so that the edge of the connecting hole is temporarily separated from or clamped into the connecting groove, thereby facilitating the mounting and dismounting of the guide 13.

In some examples, the end of the scale rod that contacts the bed surface is provided with a base 16, the scale rod needs to be perpendicular to the bed surface, and the plane of the base 16 that contacts the bed is large, so that the scale rod can be kept as vertical as possible while standing stably on the bed surface.

The embodiment of the utility model provides a double-sleeve device, double-sleeve device are used for cooperating above-mentioned thighbone neck positioner to use, and double-sleeve device includes base 21, sleeve 23, is provided with the cavity on the base 21.

The two sleeves 23 are arranged, and the cervical shaft angle needs to be positioned before the anteversion angle is positioned in the using process of the femoral neck positioning device. An external guide pin positions the upper edge of the neck of femur, after guaranteeing that guide bar 12 and guider 13 can position the mid point of the sagittal plane of the lateral femur, locate a sleeve 23 of the double-sleeve device on the guide pin, the neck of femur positioner rotates integrally, make guide bar 12 can be located on another sleeve 23, the guider 13 is parallel with guide bar 12 at this moment, guarantee from another guide pin that guider 13 is hit into parallel with guide pin before.

In some examples, the sleeve 23 is slidably connected between the outer side wall and the cavity, a part of the sleeve 23 is located inside the base 21, and the sleeve 23 can slide inside the base 21 along the cavity while keeping the parallelism between the sleeves 23 as much as possible. The cavity is configured as a sliding slot, or alternatively, the base 21 is configured as a housing, and the hollow portion is the cavity.

In some examples, at least one sleeve 23 can move along the cavity, specifically, one sleeve 23 is fixedly disposed on the base 21, the fixedly disposed sleeve 23 cannot move relative to the base 21 and is always perpendicular to the base 21, so that positioning inaccuracy caused by unnecessary rotation of the base 21 in a movable range is prevented, and difficulty in adjusting a distance caused by movement of both sleeves 23 is avoided by adjusting a distance between the two sleeves by using the other movable sleeve 23. The other sleeve 23 is movable along the guide structure, and the distance between the two sleeves 23 can be adjusted by movement under the restriction of the guide structure, thereby flexibly dealing with different situations of each patient.

The base 21 is provided with graduations along the direction in which the cavity extends, so that the distance between the two sleeves 23 can be read conveniently. Specifically, when one sleeve 23 is fixedly arranged and the other sleeve 23 is slidable, the zero point of the scale corresponds to the fixedly arranged sleeve 23, so that the distance between the two sleeves can be accurately adjusted, the reading is convenient, and the scale reading corresponding to the slidable sleeve 23 is the distance between the two sleeves 23. Can also accurately fix a position subsequent guide pin through applying double sleeve device, when follow-up guide pin was beaten to first piece of guide pin is the benchmark, locates first piece of guide pin with 23 covers of fixed sleeve among the double sleeve device on, adjusts the distance between two sleeves, throws into next piece of guide pin along slidable sleeve 23 again, when having guaranteed between the guide pin basic parallel, controls the distance between the guide pin.

In some examples, the sleeve 23 is provided with a protrusion 24 on the outer side wall, and by the arrangement of the protrusion 24, the outer side wall of the sleeve 23 can be better matched with a guide structure in the base 21, and the expected movement of the sleeve 23 in the base 21 is ensured to be avoided. The projection 24 is detachably connected with the sleeve 23 to ensure that the sleeve is easy to install, firstly the sleeve 23 passes through the cavity, and then the projection 24 is installed on the sleeve 23. In particular, a threaded connection is used between the sleeve 23 and the projection 24.

Because there is the external diameter of size change sleeve 23, base 21 includes a plurality of base members, and each base member is range upon range of setting, and different base members all are provided with corresponding guide structure and correspond respectively with the external diameter of sleeve 23.

In the description of the present specification, reference to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (7)

1. Femoral neck positioner, its characterized in that includes:

the clamping device comprises two clamping pieces (10), wherein the two clamping pieces (10) are rotatably connected;

the rotating shaft (11) is used for hinging the clamping piece (10) through the rotating shaft (11);

the guide rod (12) is arranged on the rotating shaft (11), the guide rod (12) is fixedly connected with the rotating shaft (11), and the rear end of the guide rod (12) is positioned in an angle formed by the rear ends of the two clamping pieces (10);

the guider (13), the guider (13) is tubular, the guider (13) is arranged on the rotating shaft (11), and the guider (13) is detachably connected with the rotating shaft (11);

the scale rod comprises a scale and a supporting piece (15), the supporting piece (15) can slide on the scale, the guide rod (12) and the guider (13) can be arranged on the supporting piece (15), and scales are arranged on the scale.

2. The femoral neck positioning device according to claim 1, wherein the guide rod (12) is located on a line which is a bisector of an angle formed by the posterior ends of the two clamps (10).

3. The femoral neck positioning device according to claim 1, wherein the guide rod (12) is in threaded connection with the rotating shaft (11), the front end of the guide rod (12) is provided with external threads, and the rotating shaft (11) is provided with corresponding internal threads.

4. The femoral neck positioning device according to claim 1, wherein the scale is provided with a sliding track, and the bearing member (15) is provided with a sliding block, and the sliding block is arranged in the sliding track.

5. The femoral neck positioning device according to claim 1, wherein the shaft (11) is provided with a resilient member (14), the resilient member (14) is provided with a coupling hole, and the resilient member is coupled to the guide (13).

6. The femoral neck positioning device according to claim 5, wherein the guide (13) is provided with a coupling groove at one end connected with the elastic member (14), and the coupling groove corresponds to the coupling hole.

7. The femoral neck positioning device of claim 1, wherein the scale bar comprises a base (16), the scale being disposed on the base (16).

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