CN220236991U - Femoral intramedullary needle positioning device - Google Patents

Abstract

The application provides a femoral intramedullary needle positioning device, a fixation seat with an opening at the bottom of the fixation seat configured to mount the fixation seat to a femoral tuberosity; the positioning holes are formed in the fixing seat and are communicated with the opening; the sleeves are connected to the corresponding positioning holes and are used for placing guide pins; the handle is positioned on the fixed seat and is used for keeping the position of the fixed seat unchanged when the guide needle is placed. Through the positioner that this application provided, can solve present thigh bone marrow internal needle fixing system location inaccuracy, only rely on the operator to feel, subjectivity is too strong, a great deal of problem such as repeatability is low.

Description

Femoral intramedullary needle positioning device

Technical Field

The application relates to the field of orthopaedics equipment, in particular to a femoral intramedullary needle positioning device.

Background

Femoral intramedullary needle surgery is a procedure performed under local anesthesia by inserting a guide needle at the site of the lesion and injecting a drug or other therapeutic substance into the bone marrow cavity to achieve therapeutic effects. Therefore, the guide needle is accurately inserted into the bone marrow cavity, so that the accurate administration of the therapeutic medicine is realized, and the guide needle is a key factor for ensuring the therapeutic effect. The current femur intramedullary pin operation is usually assisted by imaging technology, needs a doctor with abundant experience to repeatedly observe and determine the position of the guide pin, has higher operation difficulty and has high dependence on the professional ability of the doctor. In order to improve the accuracy and safety of the operation, some medical companies currently develop femoral intramedullary needle fixation systems to assist doctors in femoral intramedullary needle operations, and are widely used for various types of proximal femur fractures.

However, the existing femoral intramedullary needle fixing system is single in design structure, cannot adapt to bone structures and operation requirements of different patients, and under some complicated operation conditions, a doctor cannot accurately position, so that an operation effect is poor, and therefore, the operation experience of the doctor is still needed to be relied on, subjectivity is high, and operation efficiency is not obviously improved.

Disclosure of Invention

Aiming at the problems, the utility model provides a femoral intramedullary needle positioning device which aims to solve the problems that the existing femoral intramedullary needle fixing system is inaccurate in positioning, and the subjectivity is too strong, the repeatability is low and the like by only relying on the hand feeling of an operator.

The technical scheme of the utility model is as follows:

a femoral intramedullary needle positioning device comprising:

a mount having an opening at a bottom thereof configured to mount the mount to a femoral tuberosity;

the positioning holes are formed in the fixing seat and are communicated with the opening;

sleeves, each sleeve is connected to a corresponding positioning hole, and the sleeves are used for placing guide pins;

the handle is positioned on the fixed seat and is used for keeping the position of the fixed seat unchanged when the guide needle is placed.

As one of the preferred embodiments, the apparatus further includes:

the guide plate downwards extends from one side of the bottom of the fixing seat, and the inner wall surface of the guide plate is arc-shaped so as to be matched with the outer surface of the femoral shaft.

As one of the preferred embodiments, the apparatus further includes:

and the extension guide plate is detachably connected with the extension end of the guide plate.

As one of the preferable schemes, the extension guide plate comprises a base and a plurality of inserting posts positioned on the base, a plurality of inserting holes are formed in the extension end of the guide plate, and each inserting post is inserted into the corresponding inserting hole.

As one of preferable schemes, the inner wall surface of the guide plate is sprayed with an anti-slip coating.

As one of the preferable schemes, a rubber pad is stuck on the inner wall surface of the guide plate.

As one of the preferable schemes, the fixing seat is fixedly connected with the guide plate.

As one of preferable schemes, the fixing seat is connected with the guide plate through a horizontal rotating shaft, and the fixing seat can rotate relative to the guide plate by taking the horizontal rotating shaft as an axis.

As one of the preferable schemes, a baffle is arranged at one end of the guide plate, which is close to the fixed seat, and the baffle is used for limiting the rotation range of the fixed seat.

As one of preferable schemes, the sleeve is in threaded connection with the positioning hole, and the handle is in threaded connection with the fixing seat.

Compared with the prior art, the application has the following advantages:

the utility model provides a femoral intramedullary needle positioning device, which comprises a fixed seat with an opening at the bottom, wherein the opening is configured to mount the fixed seat on a femoral tuberosity; a plurality of positioning holes which are arranged on the fixed seat and are communicated with the opening; the sleeves are connected to the corresponding positioning holes and are used for placing guide pins; and the handle is positioned on the fixed seat and used for keeping the fixed seat unchanged in position when the guide needle is placed in. By adopting the technical scheme, the fixing seat can be arranged on the femur tuberosity, and the plurality of positioning holes on the fixing seat can facilitate a doctor to select proper positioning holes for quick positioning according to actual needs, and the doctor can adjust the positioning angle and the position of the guide pin by selecting different positioning holes so as to lead the guide pin to be more accurately directed at a lesion area, thereby being applicable to bone structures of different patients; the sleeve is connected to each positioning hole, so that the guide pin can be quickly and accurately placed into the femoral shaft, and the stability and accuracy of the guide pin are ensured; the handle is arranged on the fixed seat, so that a doctor can be helped to improve the stability of operation; therefore, the device has high repeatability, can greatly improve the operation efficiency of experienced doctors, can help young doctors to finish the operation more conveniently and smoothly, and reduces the operation difficulty and risk in the operation process.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is an exploded view of the overall structure of a femoral intramedullary needle positioning device in accordance with one embodiment of the present application;

FIG. 2 is a schematic elevational view of a femoral intramedullary needle positioning device in accordance with one embodiment of the present application;

fig. 3 is a schematic right-view structural view of a femoral intramedullary needle positioning device according to one embodiment of the present application.

Reference numerals illustrate:

1. a fixing seat; 2. positioning holes; 3. a sleeve; 4. a handle; 5. a guide plate; 51. a slot; 6. an extension guide plate; 61. a base; 62. inserting a column; 7. a baffle; 8. and (5) mounting holes.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In light of the description in the background, the deficiencies of existing femoral intramedullary needle fixation systems are mainly manifested in at least three aspects:

1. the existing femoral intramedullary needle fixing system generally has only 1-2 positioning holes 2, so that under some complicated operation conditions, doctors cannot accurately position the femoral intramedullary needle, and the operation effect is poor;

2. the existing fixing seat 1 is generally fixed on an operating table, so that the angle and the position cannot be flexibly adjusted, and the adjustment of a doctor on the position of a guide pin is limited;

3. the existing femoral intramedullary needle fixing system cannot adapt to the operation requirements of patients with different physique, the application population is limited, and the flexibility is low.

Referring to fig. 1, fig. 1 is an exploded view showing the overall structure of the femoral intramedullary pin positioning device of the present utility model.

The utility model mainly aims to solve the problem that the current femoral intramedullary needle fixing system cannot be accurately positioned, and as shown in fig. 1-3, the utility model provides a femoral intramedullary needle positioning device, which comprises: a holder 1, the holder 1 having an opening at the bottom configured to mount the holder 1 to a femoral tuberosity; a plurality of positioning holes 2 which are arranged on the fixed seat 1 and are communicated with the opening; sleeves 3, wherein each sleeve 3 is connected to the corresponding positioning hole 2, and the sleeve 3 is used for placing a guide pin; the handle 4 is positioned on the fixed seat 1, and the handle 4 is used for keeping the position of the fixed seat 1 unchanged when the guide needle is placed.

Specifically, the fixing seat 1 is of a groove-shaped structure with an opening at the bottom, the shape outline of the opening of the fixing seat is matched with the outline of the outer edge of the femoral tuberosity, and the fixing seat can be better attached to the femoral tuberosity in the operation process, so that the operation of doctors is facilitated. In some embodiments, the outer surface of the holder 1 may be semicircular. The material of the fixing base 1 should have a certain hardness and toughness to ensure that it can withstand the pressure of the guide pin when it is inserted and not deform due to repeated use, for example, the material of the fixing base 1 may be stainless steel, titanium alloy, hard alloy, engineering plastic, or the like.

Wherein, locating hole 2 can set up on fixing base 1 and run through fixing base 1 in a scattered way for the guide pin can be put into in the femoral bone marrow through locating hole 2. In some embodiments, the number of the positioning holes 2 may gradually increase from the center of the fixing base 1 to the periphery, for example, when the fixing base 1 is hemispherical, one positioning hole 2 is provided at the center vertex of the fixing base 1, at least two positioning holes 2 are provided at a first level and more positioning holes 2 are provided sequentially from a second level to an nth level along the axial direction of the fixing base 1.

It will be appreciated that the number of axial layers from the first level to the last level may be determined according to the distance between the two levels and the number, shape, size and other parameters of the positioning holes 2 actually required to be used, and the embodiment of the present utility model is not limited.

The present utility model exemplarily shows a structure in which one positioning hole 2 is provided at the central vertex of the fixing base 1, and five positioning holes 2 are provided at the first level (as in the positioning hole 2 arrangement form in fig. 1). Therefore, the positioning function of the positioning holes 2 can provide more choices for doctors, and the doctors can select proper positioning holes 2 to operate according to actual needs so as to adapt to the positioning needs of the guide pins under different conditions. After the insertion form of the guide needle is determined, different combination modes of the positioning holes 2 are selected, and a doctor can adjust the positioning angle and the positioning position of the guide needle to enable the guide needle to more accurately point to a lesion area, so that therapeutic substances are more accurately injected.

In some embodiments, a sleeve 3 may be provided and the guide pin may be positioned through the sleeve 3 into the locating hole 2 and into the femur via the locating hole 2. Wherein the sleeve 3 and the positioning hole 2 can be in a number relation of a plurality of pairs or a number relation of a plurality of pairs. The number relation of one to many can be that a plurality of positioning holes 2 are arranged on one fixed seat 1 and one sleeve 3 is configured, when a guide pin is needed to be placed, the sleeve 3 can be installed on the positioning hole 2 at the corresponding position, after the guide pin is placed, the sleeve 3 is detached from the positioning hole 2 and then installed on the positioning hole 2 at the other corresponding position, a second guide pin is placed, and so on; the number relation of many to many can be that a plurality of locating holes 2 are arranged on a fixed seat 1 and a plurality of sleeves 3 are arranged, after a doctor determines the insertion form of the guide needle, the guide needle can be inserted through the corresponding sleeve 3 on the corresponding locating hole 2, and after the operation is finished, the sleeve 3 is detached at one time. So this device flexibility is high, can adapt to different doctors' operating habits.

In the guide pin implantation process, the handle 4 can be arranged on the side wall of the fixed seat 1, so that a doctor can conveniently hold the guide pin, the fixed seat 1 is prevented from being offset due to thrust in the guide pin implantation process, the fixed seat 1 can be stably kept at the accurate position when the guide pin is implanted, and the guide pin implantation stability and the guide pin implantation controllability can be improved when the guide pin is matched with the sleeve 3. Meanwhile, the handle 4 can facilitate a doctor to finely adjust the position of the fixing seat 1, so that the guide pin is ensured to be positioned at the correct position when the guide pin is ready to be put in.

It is known that the sleeve 3 and the positioning hole 2 can be detached, in this embodiment, the sleeve 3 and the positioning hole 2 can be connected by threads, specifically, an inner thread is disposed on an inner wall of the positioning hole 2, and an outer thread matched with the inner thread is disposed on an outer wall of an end portion of the sleeve 3. The end of the sleeve 3 may be a portion of the sleeve 3 located within the positioning hole 2 when the sleeve 3 is inserted into the positioning hole 2.

In the present embodiment, the handle 4 is obliquely disposed on the side wall of the hemispherical fixing base 1 and is offset from the positioning hole 2. The side wall provided with the handle 4 is directed to the operator side. In some embodiments, the holder 1 is provided with mounting holes 8, the mounting holes 8 being configured to be inserted into the handle 4. In some embodiments, the depth of the mounting hole 8 may be less than the wall thickness of the holder 1, i.e. not in communication with the opening.

In this embodiment, the handle 4 and the mounting hole 8 may be detachable, and the handle 4 and the mounting hole 8 may be connected by threads, specifically, an inner thread is provided on an inner wall of the mounting hole 8, and an outer thread matching the inner thread is provided on an outer wall of an end portion of the handle 4. The end of the handle 4 may be the portion of the handle 4 that is located within the mounting hole 8 when the handle 4 is inserted into the mounting hole 8.

The working principle of the utility model is as follows:

specifically, the opening part of the fixing seat 1 is buckled at the tuberosity part of the femur, a doctor holds the handle 4 to stabilize the position of the fixing seat 1, at least six positioning holes 2 are formed, three positioning holes 2 at proper positions are selected, the sleeve 3 is firstly arranged on the first positioning hole 2, the guide needle is placed into the femur intramedullary from the sleeve 3, then the sleeve 3 is replaced on the second positioning hole 2, the guide needle is placed into the femur intramedullary from the sleeve 3, three guide needles are inserted in sequence, the selection of the target guide needle is completed under the perspective of at most two positive side positions, and then the remaining two guide needles are taken out, so that the guide needle positioning time is greatly shortened, and the operation can reach the optimal effect in the shortest time and be completed smoothly.

Still another object of the present application is to solve the problem that the existing femoral intramedullary needle fixation system cannot be adapted to the surgical requirements of different patients, the application population is limited, and the flexibility is low, please refer to fig. 2 and 3, fig. 2 illustrates an exemplary femoral intramedullary needle positioning device according to some embodiments of the present disclosure, showing an elevation view; fig. 3 illustrates an exemplary femoral intramedullary pin positioning device, according to some embodiments of the present disclosure, showing a perspective from a side of the guide plate 5, the present application proposes a solution:

the guide plate 5 extends downwards from one side of the bottom of the fixing seat 1, and the inner wall surface of the guide plate 5 is arc-shaped to be matched with the outer surface of the femoral shaft. The overall shape of the guide plate 5 can be an arc guide plate 5, the concave end of the arc guide plate 5 faces the femoral shaft as an inner wall surface, the convex end faces the operator as an outer wall surface, the inner wall surface can be better adapted to the femur shape of a patient, and the arc guide plate is attached to the femoral shaft to provide better guiding and supporting. It will be appreciated that some people may have a thicker femur and others may be more slender due to the possible differences in femur size and morphology among different people. Therefore, the downward extending distance of the guide plate 5 from the fixing base 1 can be determined according to the femur size and shape of most human bodies.

Aiming at the medical requirements of different patients, the extension guide plate 6 can be detachably connected with the extension end of the guide plate 5 so as to adapt to the size and the shape of the femur of other small-sized human bodies. In the present embodiment, for a patient of a small size, the guide plate 5 can be used; an extension guide 6 may be installed at the bottom end of the guide 5 for patients of high and large body sizes. By lengthening the guide plate 6, adjustments can be made according to the length and morphology of the patient's femur to ensure the fit and accuracy of the guide plate 5. The combined use of the guide 5 and the extension guide 6 can improve the safety and effectiveness of femoral intramedullary needle surgery and make the surgical operation easier and more convenient.

In some embodiments, the extension guide 6 includes a base 61 and a plurality of posts 62 located on the base 61, and the extension end of the guide 5 is provided with a plurality of insertion holes 51, and each of the posts 62 is inserted into a corresponding insertion hole 51. Wherein the base 61 may be an arcuate base 61 that matches the shape of the outer rim of the femoral shaft. Wherein the height of the plug 62 should be greater than the depth of the socket 51 so that when the plug 62 is inserted into the socket 51, a portion of the plug 62 not inserted into the socket 51 forms an elongated portion integrally with the base 61. In some alternative embodiments, the height of the post 62 may also be consistent with the depth of the receptacle 51, and the height of the base 61 may be suitably extended such that the base 61 forms an extended portion when the post 62 is inserted into the receptacle 51, but in such a way as to increase the weight of the overall device.

In some embodiments, the inner diameters of the plurality of posts 62 may be the same size. In some embodiments, the inner diameters of the plurality of posts 62 may have different sizes. In some embodiments, the heights of the posts 62 of the same or different inner diameters may have the same dimensions, and the height of the posts 62 may be the height extending from the top surface of the base 61 to the end in contact with the receptacle 51. In some embodiments, the heights of the posts 62 of the same or different inner diameters may have different dimensions. It will be appreciated that each post 62 on the base 61 is positioned opposite a corresponding socket 51 on the bottom end of the guide 5 and is sized and shaped to allow the elongate guide 6 to be inserted into the socket 51 without gaps to complete the connection.

In one embodiment, the inner wall surface of the guide plate 5 is coated with an anti-slip coating. In a further embodiment, a rubber pad is adhered to the inner wall surface of the guide plate 5. The inner wall surface of the guide plate 5 is processed, so that the guide plate 5 can be tightly attached to the femoral shaft, and the accuracy and stability in the operation process are ensured. The anti-slip coating can be made of polyurethane, silane or rubber, and the like, and is sprayed on the inner wall surface of the guide plate 5, so that friction force is increased, and the guide plate 5 is prevented from sliding relative to the femoral shaft. The rubber pad generally has better compressive resistance and wear resistance, increases frictional force between backup pad and the femoral shaft, and can also reduce vibrations and noise simultaneously.

As described above, one end of the guide 5 is connected to the fixing base 1, and the other end extends downward. In some embodiments, another object of the present utility model is to solve the problem that the existing fixing seat 1 is generally fixed on an operating table, and cannot flexibly adjust the angle and the position, and limit the adjustment of the guide pin position by a doctor, and adopts the following technical scheme:

in an embodiment, the fixed end of the guide plate 5 may be fixedly connected with the fixing base 1. In yet another embodiment, the fixed end of the guide plate 5 may be connected to the fixing base 1 through a horizontal rotation shaft, and the fixing base 1 may rotate relative to the guide plate 5 about the horizontal rotation shaft. The horizontal rotating shaft can be a pin shaft arranged on the fixing seat 1, the guide plate 5 is hinged with the pin shaft through a corresponding pin hole, the fixing seat 1 can rotate relative to the guide plate 5 when the guide plate 5 is attached to the femoral shaft, so that the angle of the fixing seat 1 is adjusted, the femoral shaft can be attached to femoral tuberosity of different patients, the angle of the positioning hole 2 can be adjusted, the proper position of the positioning hole 2 is combined and selected through the angle of the positioning hole 2, the guide needle can be ensured to accurately and quickly reach a lesion area, and the damage to surrounding tissues is reduced as much as possible.

Because the femur size and the shape of different people may not be too different, one end of the guide plate 5, which is close to the fixing seat 1, is provided with a baffle 7, and the baffle 7 is used for limiting the rotation range of the fixing seat 1, so that the fixing seat 1 can rapidly position femur tuberosities of different patients. Specifically, the blocking piece 7 is configured to limit the movement range of the fixing base 1, and may be a column or a block, and the blocking piece 7 is disposed on the fixing end of the guide plate 5, and is close to the fixing base 1 and corresponds to the rotation track of the fixing base 1. When the fixed seat 1 rotates to a certain angle, the fixed seat 1 contacts the baffle 7 to prevent the fixed seat from continuing to rotate. Through adjusting the angle of fixing base 1, when fixing base 1 just laminating in the thighbone tuberosity department of patient, inwards put into the guide pin through sleeve 3 through the quantity and the arrangement form of selecting locating hole 2.

The height of the blocking piece 7 is slightly higher than that of the pin shaft of the fixing base 1, so that the fixing base 1 can still keep a stable position after being contacted with the blocking piece 7. The specific parameters such as the position, the height, the shape and the like of the baffle 7 need to be determined according to the movement range of the fixing seat 1. The movement range of the fixing seat 1 can be designed according to the difference of the sizes and the forms of the thighbones of different people, so that the fixing seat 1 can rapidly position thighbone tuberosity of different patients.

In conclusion, the device provided by the utility model has the advantages of simple structure, easiness in use, high stability and accuracy, high repeatability and capability of rapidly and accurately helping doctors to insert guide pins into focus, reducing the labor intensity and operation difficulty of the doctors in the operation process and improving the success rate and safety of femoral operations.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It should also be noted that, in the present document, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Moreover, relational terms such as "first" and "second" may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, or order, and without necessarily being construed as indicating or implying any relative importance. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal.

The above description has been provided for the purpose of providing a femoral intramedullary needle positioning device, and specific examples have been used herein to illustrate the principles and embodiments of the present application, and the description of the above examples is merely intended to facilitate an understanding of the present application, and the present disclosure should not be construed as limiting the present application. Also, various modifications in the details and application scope may be made by those skilled in the art in light of this disclosure, and all such modifications and variations are not required to be exhaustive or are intended to be within the scope of the disclosure.

Claims (10)

1. A femoral intramedullary needle positioning device comprising:

a mount having an opening at a bottom thereof configured to mount the mount to a femoral tuberosity;

the positioning holes are formed in the fixing seat and are communicated with the opening;

the sleeves are connected to the corresponding positioning holes and are used for placing guide pins;

the handle is positioned on the fixed seat and is used for keeping the position of the fixed seat unchanged when the guide needle is placed.

2. A femoral intramedullary needle positioning device of claim 1, further comprising:

the guide plate downwards extends from one side of the bottom of the fixing seat, and the inner wall surface of the guide plate is arc-shaped so as to be matched with the outer surface of the femoral shaft.

3. A femoral intramedullary needle positioning device of claim 2, further comprising:

and the extension guide plate is detachably connected with the extension end of the guide plate.

4. A femoral intramedullary needle positioning device of claim 3, wherein the elongate guide plate includes a base and a plurality of posts positioned on the base, the guide plate having a plurality of receptacles formed in an extended end thereof, each of the posts being inserted into a corresponding one of the receptacles.

5. The femoral intramedullary pin positioning device of claim 2, wherein the inner wall surface of the guide plate is coated with an anti-slip coating.

6. The femoral intramedullary pin positioning device of claim 2, wherein a rubber pad is affixed to an inner wall surface of the guide plate.

7. The femoral intramedullary needle positioning device of claim 2, wherein the anchor is fixedly coupled to the guide plate.

8. The femoral intramedullary needle positioning device of claim 2, wherein the mount is coupled to the guide plate via a horizontal shaft, the mount being rotatable relative to the guide plate about the horizontal shaft.

9. The femoral intramedullary pin positioning device of claim 8, wherein a stop is provided on the guide plate at an end proximate the anchor block, the stop configured to limit a range of rotation of the anchor block.

10. The femoral intramedullary needle positioning device of claim 1, wherein the sleeve is threadably coupled to the positioning hole and the handle is threadably coupled to the anchor block.