Proximal femur intramedullary nail main nail guide needle entry point positioner

Abstract

The utility model discloses a proximal femur intramedullary nail main nail guide needle entry point positioner, and relates to the technical field of medical instruments, in particular to a proximal femur intramedullary nail main nail guide needle entry point positioner which comprises a positioner body, the positioner body is composed of a handle portion and a low-incisura pressing portion, and the pressing portion is in a plate shape with a certain thickness. And the front edge of the piriform muscle nest is sensed through the side wall structure until the front edge and the piriform muscle nest are relatively clamped. Then, a guide needle is placed in a guide hole of the pressing part, and under C-arm machine perspective, the position of the guide needle on the side position X-ray perspective piece is properly adjusted, so that the needle inlet point of the guide needle is located at the vertex position on the normal position X-ray perspective piece and located at the central axis position of the femoral neck on the side position X-ray perspective piece. The guide needle is inserted into the femoral shaft, the positioner is taken down, subsequent operation steps such as opening, imbedding of the main nail, the head nail and the tail nail are carried out in sequence, and the purpose of effectively and accurately locking the needle inserting point position of the main nail guide needle of the proximal femoral nail is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a needle insertion point locator for a main nail guide needle of a proximal femoral intramedullary nail. Background Art

[0002] The anti-rotation proximal femoral nail (PFNA) is an internal fixation system used to treat proximal femoral fractures. During its use, it is necessary to ensure that the insertion point of the main nail guide needle of the intramedullary nail is accurately positioned. If the insertion point is not positioned well, the main nail of the intramedullary nail will deviate from the center of the medullary cavity during the subsequent operation. In actual surgical operations, due to the lack of a guide needle insertion point locator, surgeons often determine the insertion point by feeling, which makes it difficult to locate the insertion point in one step, and repeatedly adjusting the position of the insertion point increases the operation time.

[0003] In the published Chinese patent application, publication number: CN215960229U, patent name: Proximal femoral intramedullary nail entry point positioning guide, although, an external sleeve and a first positioning device under the external sleeve are used to preliminarily lock the position of the main nail entry point. Then, by fine-tuning the internal sleeve and the nail entry hole at the top of the internal sleeve, the position of the main nail entry point is further accurately locked, so that the position of the main nail entry point found is more accurate. However, this prior art uses a first positioning device and a second positioning device to support the external sleeve, and the second positioning device is overall triangular in shape, and the second positioning device is placed on the greater trochanter of the femur. Due to the irregularity of the greater trochanter of the femur, the second positioning device is difficult to place stably, making it difficult for the entire external sleeve to be effectively stabilized, and it is impossible to accurately lock the position of the main nail entry point (that is, the needle entry point).

[0004] In summary, the existing problems in the prior art are: the insertion point of the main nail guide needle of the proximal femoral intramedullary nail is not accurately positioned. In order to solve the problems in the prior art, this application is specially proposed to solve them. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a needle insertion point locator for a main nail guide needle of a proximal femoral intramedullary nail, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a proximal femoral intramedullary nail main nail guide needle entry point locator, including a locator body, the locator body is composed of a handle and a low-profile pressing part, the pressing part is in the shape of a plate with a certain thickness, a plurality of guide holes passing through the pressing part are opened on the pressing part, and a side wall of the pressing part is provided with a side wall structure.

[0009] Optionally, the locator body is made of a material that is transparent to X-rays.

[0010] Optionally, the guide holes may be distributed independently, or two adjacent guide holes may partially overlap.

[0011] Optionally, the side wall structure of the pressing portion may be a plurality of protrusions.

[0012] Optionally, the protrusions are hemispherical or truncated cone-shaped, and each of the protrusions is arranged along the length direction of the pressing portion.

[0013] Optionally, the side wall structure of the pressing portion may be in the shape of a hill with a certain undulating slope.

[0014] Optionally, the guide holes are all located on the central axis of the pressing portion.

[0015] (III) Beneficial effects

[0016] The utility model provides a proximal femoral intramedullary nail main nail guide needle insertion point locator, which has the following beneficial effects:

[0017] 1. The proximal femoral intramedullary nail main nail guide needle insertion point locator has the effect of quickly and accurately locking the position of the nail insertion point through the matching arrangement of the pressing part, the convex side wall structure, and the guide hole. The pressing part is closely attached to the medial edge of the superior ridge of the greater trochanter of the femur through each protrusion, and slides forward along the medial edge of the superior ridge of the greater trochanter of the femur, and senses the front edge of the piriformis fossa through the protrusion until it is relatively stuck with the piriformis fossa. Then, the guide needle is inserted into the guide hole of the pressing part, and the position of the guide needle on the lateral X-ray film is appropriately adjusted under the fluoroscopy of the C-arm machine, so that the insertion point of the guide needle is located at the apex of the greater trochanter of the femur on the anteroposterior X-ray film and at the central axis of the femoral neck on the lateral X-ray film. The guide needle is inserted into the femoral shaft, the locator is removed, and subsequent surgical steps such as opening, inserting the main nail, head nail, and tail nail are performed in sequence, thereby achieving the purpose of effectively and accurately locking the position of the insertion point of the main nail and guide needle of the proximal femoral intramedullary nail.

[0018] 2. The proximal femoral intramedullary nail main nail guide needle insertion point locator has the effect of quickly and accurately locking the position of the nail insertion point through the matching arrangement of the pressing part, the hill-shaped side wall structure, and the guide hole. The side wall structure of the pressing part is in the shape of a hill with a certain undulating slope, which is adapted to the piriformis fossa of the proximal femur. During the operation, the doctor can slide the pressing part to place the side wall structure in the piriformis fossa and get stuck with the piriformis fossa. Afterwards, the guide needle is inserted into the guide hole of the pressing part, and the position of the guide needle on the lateral X-ray film is appropriately adjusted under the fluoroscopy of the C-arm machine, so that the insertion point of the guide needle is located at the apex of the greater trochanter of the femur on the anteroposterior X-ray film and at the mid-axis position of the femoral neck on the lateral X-ray film. The guide needle is inserted into the femoral shaft, the locator is removed, and subsequent surgical steps such as opening, inserting the main nail, head nail, and tail nail are performed in sequence, thereby achieving the purpose of effectively and accurately locking the position of the insertion point of the main nail and guide needle of the proximal femoral intramedullary nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a second embodiment of a main nail guide needle insertion point locator for a proximal femoral intramedullary nail according to the utility model;

[0021] Figure 2 It is a schematic diagram of the top view of the structure of the second embodiment of the main nail guide needle insertion point locator for the proximal femoral intramedullary nail of the utility model;

[0022] Figure 3 It is a front view structural schematic diagram of a second embodiment of a proximal femoral intramedullary nail main nail guide needle insertion point locator of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a second embodiment of a proximal femoral intramedullary nail main nail guide needle insertion point locator of the utility model, viewed from the bottom;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of a first embodiment of a proximal femoral intramedullary nail main nail guide needle insertion point locator of the utility model;

[0025] Figure 6 It is a schematic diagram of the rear view structure of the proximal end of the left femur of a human body;

[0026] Figure 7 This is a schematic diagram of the structure of the proximal end of the left femur of the human body from a top view.

[0027] In the figure: 1. locator body; 101. handle; 102. pressure part; 2. guide hole; 3. side wall structure; 4. femoral head; 5. piriformis fossa; 6. greater trochanter; 7. intertrochanteric ridge; 8. lesser trochanter; 9. femoral neck; 10. apex of greater trochanter. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0030] Embodiment 1

[0031] See also Figures 5 to 7 The utility model provides a technical solution: a proximal femoral intramedullary nail main nail guide needle insertion point locator, including a locator body 1, the locator body 1 is composed of a handle 101 and a low-profile pressing part 102, the pressing part 102 is in the shape of a plate with a certain thickness, a plurality of guide holes 2 are opened on the pressing part 102, and a side wall of the pressing part 102 is provided with a side wall structure 3.

[0032] The handle 101 is used for the convenience of the doctor to hold it during surgery. The low-profile design of the pressing part 102 can effectively reduce the damage to the soft tissue in the surgical area. The locator body 1 is made of a material that is transparent to X-rays. During the C-arm fluoroscopy, X-rays can penetrate the locator body 1.

[0033] The guide hole 2 is used to guide the guide needle into the femur. Each guide hole 2 can be independently distributed on the pressing portion 102, and two adjacent guide holes 2 can also be partially overlapped and distributed on the pressing portion 102. The guide holes 2 are all located on the central axis of the pressing portion 102.

[0034] The side wall structure 3 of the pressing part 102 can be a plurality of protrusions, and each protrusion is arranged on a side wall of the pressing part 102 away from the handle 101. The protrusions are hemispherical or truncated, and each protrusion is arranged along the length direction of the pressing part 102. The pressing part 102 is made close to the inner edge of the upper ridge of the greater trochanter 6 of the femur by the protrusions. When the pressing part 102 slides, the protrusions contact the piriformis fossa 5 and can gradually get stuck in the piriformis fossa 5, so that the guide hole 2 corresponds to the apex 10 of the greater trochanter. Through the above operation, it is ensured that the needle insertion point is located at the apex 10 of the greater trochanter on the anteroposterior X-ray film. At the same time, the needle insertion on the lateral film is quantified by the guide hole 2, thereby ensuring that the needle insertion point is located at the central axis of the femoral neck 9 on the lateral X-ray film.

[0035] In the attached drawings, the femoral head 4, the intertrochanteric crest 7, the lesser trochanter 8, the apex of the greater trochanter 10, the femoral neck 9 and the like are marked to help understand the proximal femoral structure.

[0036] When in use, the pressure part 102 is closely attached to the medial edge of the superior ridge of the greater trochanter 6 of the femur through the various protrusions, and slides forward along the medial edge of the superior ridge of the greater trochanter 6 of the femur, and senses the front edge of the piriformis fossa 5 through the protrusions. Afterwards, the doctor inserts the guide needle into the guide hole 2 of the pressure part 102, and appropriately adjusts the position of the guide needle on the lateral X-ray fluoroscopy under the fluoroscopy of the C-arm machine, so that the insertion point of the guide needle is located at the position of the apex 10 of the greater trochanter on the anteroposterior X-ray fluoroscopy and at the central axis position of the femoral neck 9 on the lateral X-ray fluoroscopy. The guide needle is inserted into the femoral shaft, the locator shown in the present application is removed, and the subsequent surgical steps such as opening, inserting the main nail, head nail, and tail nail are performed in sequence, so as to achieve the purpose of effectively and accurately locking the position of the insertion point of the main nail and guide needle of the proximal femoral intramedullary nail.

[0037] Embodiment 2

[0038] See also Figures 1 to 4, the difference between this embodiment and the first embodiment is mainly that the side wall structure 3 of the pressing part 102 is in the shape of a hill with a certain undulating slope. The side wall structure 3 in the shape of a hill is adapted to the piriformis fossa 5 at the proximal end of the femur. During the operation, the doctor can slide the pressing part 102 to place the side wall structure 3 at the piriformis fossa 5 and relatively jam the piriformis fossa 5. Thereafter, a guide needle is inserted into the guide hole 2 of the pressing part 102. Under the perspective of the C-arm machine, the position of the guide needle on the lateral X-ray fluoroscopy film is appropriately adjusted so that the insertion point of the guide needle is located at the apex 10 of the greater trochanter on the anteroposterior X-ray fluoroscopy film and at the central axis position of the femoral neck 9 on the lateral X-ray fluoroscopy film. The guide needle is inserted into the femoral shaft, the locator is removed, and the subsequent surgical steps such as opening, inserting the main nail, the head nail, and the tail nail are performed in sequence, so as to achieve the purpose of effectively and accurately locking the position of the insertion point of the main nail and the guide needle of the proximal femoral intramedullary nail.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A proximal femoral intramedullary nail main nail guide needle insertion point locator, characterized in that: The locator body (1) comprises a handle (101) and a low-profile pressing portion (102); the locator body (1) is in the shape of a strip having a certain thickness; the pressing portion (102) is provided with a plurality of guide holes (2) passing through the pressing portion; and at least one low-profile protrusion (3) is provided on a side wall of the pressing portion (102); The protrusion (3) is hemispherical or truncated cone-shaped; there are a plurality of protrusions (3), and each of the protrusions (3) is arranged along the length direction of the pressing portion (102); The protrusion (3) is in the shape of a hill, and one of the guide holes (2) is located at the protrusion (3), and the guide hole (2) passes through the protrusion (3).

2. The needle insertion point locator for the main nail guide needle of the proximal femoral intramedullary nail according to claim 1, characterized in that: Two adjacent guide holes (2) partially overlap.

3. The needle insertion point locator for the main nail guide needle of the proximal femoral intramedullary nail according to claim 1, characterized in that: The positioner body (1) is made of a material that is transparent to X-rays.

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