Humeral intramedullary nail sighting device and humerus fixing system

Abstract

The utility model discloses a humeral intramedullary nail sighting device and a humeral fixing system and belongs to the technical field of medical instruments, the humeral intramedullary nail sighting device comprises a sighting frame and a connecting piece, the front end of the connecting piece is used for being detachably connected with the near end of a humeral intramedullary nail, and the rear end of the connecting piece is used for being detachably connected with the sighting frame. A fixing piece for fixing the connecting piece on the aiming frame is arranged at the upper part of the aiming frame; a near-end sleeve containing hole coaxial with a humerus head supporting screw hole in a humerus head supporting part of the humerus intramedullary nail is further formed in the upper portion of the sighting frame, and a near-end sleeve allowing a humerus head supporting screw in the humerus head supporting screw hole to penetrate through is arranged in the near-end sleeve containing hole. A far-end sleeve containing hole coaxial with a far-end screw hole of the humeral intramedullary nail is formed in the lower portion of the sighting frame, and a far-end sleeve allowing a far-end screw in the far-end screw hole to penetrate through is arranged in the far-end sleeve containing hole. The brachial intramedullary nail sighting device and the humerus fixing system are accurate in positioning and easy and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an intramedullary nail aiming device for the humerus and a humerus fixation system. Background Art

[0002] Proximal humeral fractures refer to fractures including the surgical neck of the humerus and above, ranking third in the most common osteoporotic fractures, with a high incidence in elderly women over 60 years old, mostly caused by low-energy injuries, accounting for about 10% of elderly fractures and 39.7% of adult humeral fractures. With the advent of an aging society, the incidence of such fractures is increasing year by year. It is estimated that the number of patients with osteoporotic fractures will double by 2040. Proximal humeral fractures belong to periprosthetic fractures, and poor prognosis will directly affect the function of the shoulder joint, resulting in limited daily living ability of patients, bringing huge mental and economic burdens to patients, families and society.

[0003] To solve the above problems, the prior art has begun to use intramedullary nails for the humerus to fix the fracture ends. The proximal end of the intramedullary nail for the humerus is usually provided with a humeral head support part, on which there is a humeral head support screw hole for accommodating a humeral head support screw, below the humeral head support part there is a proximal screw hole for accommodating a proximal screw, and the distal end of the intramedullary nail for the humerus is provided with a distal screw hole for accommodating a distal screw to achieve the fixation of proximal humeral fractures. It has been found through research that during the surgical treatment of proximal humeral fractures, although the above intramedullary nail for the humerus has good effects, there are problems such as inaccurate positioning and complex operation during implantation. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an intramedullary nail aiming device for the humerus and a humerus fixation system with accurate positioning and simple operation.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] On the one hand, an intramedullary nail aiming device for the humerus is provided, including an aiming frame arranged in parallel with the intramedullary nail for the humerus, and a connecting piece for connecting the aiming frame and the intramedullary nail for the humerus, wherein:

[0007] The front end of the connecting piece is used for detachably connecting the proximal end of the intramedullary nail for the humerus, the rear end of the connecting piece is used for detachably connecting the aiming frame, and the upper part of the aiming frame is provided with a fixing piece for fixing the connecting piece on the aiming frame;

[0008] The upper part of the aiming frame is further provided with a proximal sleeve accommodating hole coaxial with the humeral head support screw hole on the humeral head support part of the intramedullary nail for the humerus, and a proximal sleeve for the humeral head support screw in the humeral head support screw hole to pass through is arranged in the proximal sleeve accommodating hole;

[0009] The lower part of the aiming frame is provided with a distal sleeve accommodating hole coaxial with the distal screw hole of the humeral intramedullary nail, and a distal sleeve for the distal screw in the distal screw hole to pass through is arranged in the distal sleeve accommodating hole.

[0010] Furthermore, on the aiming frame, above the proximal sleeve accommodating hole, there is a first accommodating groove for accommodating the end of the connecting piece, and one end of the connecting piece close to the aiming frame is inserted into the first accommodating groove.

[0011] Furthermore, one end of the connecting piece close to the aiming frame is provided with a pair of first positioning posts, and a pair of first positioning holes matched with the pair of first positioning posts are arranged in the first accommodating groove.

[0012] Furthermore, on the humeral head supporting part, there is a second accommodating groove for accommodating the end of the connecting piece, and one end of the connecting piece close to the humeral intramedullary nail is used to be inserted into the second accommodating groove.

[0013] Furthermore, one end of the connecting piece close to the humeral intramedullary nail is provided with a pair of second positioning posts, and a pair of second positioning holes matched with the pair of second positioning posts are arranged in the second accommodating groove.

[0014] Furthermore, the fixing piece is a connecting bolt, and the connecting bolt sequentially includes a threaded section close to the connecting piece, a smooth rod section in the middle, and a bolt head section far from the connecting piece;

[0015] The rear part of the connecting piece is provided with a threaded hole matched with the threaded section, the aiming frame is provided with a bolt hole communicating with the first accommodating groove and matched with the smooth rod section, and a step for blocking and cooperating with the bolt head section is arranged at the bolt hole on the aiming frame.

[0016] Furthermore, both the proximal sleeve and the distal sleeve include an outer sleeve and an inner sleeve, and a screw channel for the corresponding screw to pass through is arranged in the inner sleeve.

[0017] Furthermore, a positioning rod is arranged in the screw channel, a driving part is arranged at the rear end of the positioning rod, and the length of the positioning rod is greater than the length of the inner sleeve;

[0018] And / or, the front end of the outer sleeve is provided with a positioning tip;

[0019] And / or, the front end of the inner sleeve is a conical shape that gradually narrows from the rear to the front.

[0020] On the other hand, a humeral fixation system is provided, including a humeral intramedullary nail and the above-mentioned humeral intramedullary nail aiming device, wherein:

[0021] The proximal end of the humeral intramedullary nail is provided with a humeral head supporting part, and a humeral head supporting screw hole for accommodating a humeral head supporting screw is arranged on the humeral head supporting part. The distal end of the humeral intramedullary nail is provided with a distal screw hole for accommodating a distal screw.

[0022] Furthermore, a long slot hole for accommodating a proximal screw and extending along the axis direction of the humeral intramedullary nail is arranged below the humeral head supporting part at the proximal end of the humeral intramedullary nail.

[0023] The utility model has the following beneficial effects:

[0024] For the humeral intramedullary nail aiming device and the humerus fixation system of the utility model, the aiming frame is connected with the humeral intramedullary nail through a connecting piece, which is convenient for inserting into the humeral medullary cavity. The proximal sleeve cooperates with the aiming frame to ensure coaxiality with the humeral head supporting screw hole of the humeral intramedullary nail, and the distal sleeve cooperates with the aiming frame to ensure coaxiality with the distal screw hole of the humeral intramedullary nail, which is convenient for implanting corresponding screws, provides an implantation channel and positioning, has accurate positioning and simple operation. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the cooperation relationship between the humeral intramedullary nail aiming device and the humeral intramedullary nail of the utility model;

[0026] Figure 2 It is Figure 1 A schematic structural diagram after omitting the humeral head supporting screw, proximal screw, distal screw, proximal sleeve and distal sleeve;

[0027] Figure 3 It is Figure 1 A schematic structural diagram after the humeral intramedullary nail is implanted into the humeral medullary cavity in ;

[0028] Figure 4 It is Figure 1 A schematic structural diagram of the aiming frame in, where (a) is a front view and (b) is a sectional view of (a) along the L-L direction;

[0029] Figure 5 It is Figure 1 A schematic structural diagram of the connecting piece in, where (a) is a front view and (b) is a side view of (a);

[0030] Figure 6 It is Figure 1 A schematic structural diagram of the fixing piece in, where (a) is a front view and (b) is a side view of (a);

[0031] Figure 7 It is Figure 1 A schematic structural diagram of the proximal sleeve in, where (a) is a front view and (b) is a sectional view of (a) along the M-M direction. Detailed Embodiment

[0032] To make the technical problems, technical solutions, and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] On the one hand, the present utility model provides a humeral intramedullary nail aiming device, as Figure 1-7 shown, including an aiming frame 2 arranged in parallel with the humeral intramedullary nail 1, and a connecting member 3 for connecting the aiming frame 2 and the humeral intramedullary nail 1, wherein:

[0035] The front end of the connecting member 3 is used for detachably connecting to the proximal end of the humeral intramedullary nail 1, the rear end of the connecting member 3 is used for detachably connecting to the aiming frame 2, and a fixing member 4 for fixing the connecting member 3 on the aiming frame is provided on the upper part of the aiming frame 2;

[0036] A proximal sleeve receiving hole 21 coaxial with the humeral head support screw hole 12 on the humeral head support part 11 of the humeral intramedullary nail 1 is further provided on the upper part of the aiming frame 2, and a proximal sleeve 5 for the humeral head support screw 13 in the humeral head support screw hole 12 to pass through is provided in the proximal sleeve receiving hole 21;

[0037] A distal sleeve receiving hole 22 coaxial with the distal screw hole 14 of the humeral intramedullary nail 1 is provided on the lower part of the aiming frame 2, and a distal sleeve 6 for the distal screw 15 in the distal screw hole 14 to pass through is provided in the distal sleeve receiving hole 22.

[0038] For the humeral intramedullary nail aiming device of the present utility model, the operation steps during use can be as follows:

[0039] 1. Connect and fix the aiming frame 2 and the humeral intramedullary nail 1 with the connecting member 3, and implant them into the humeral medullary cavity and place them in a suitable position;

[0040] 2. Install the proximal sleeve 5 in the proximal sleeve receiving hole 21 of the aiming frame 2, and implant the humeral head support screw 13 along the proximal sleeve 5 to the designated position;

[0041] 3. Install the distal sleeve 6 in the distal sleeve receiving hole 22 of the aiming frame 2, and implant the distal screws 15 along the distal sleeve 6 from far to near to the designated positions in sequence, and the implantation is completed (see Figure 3 ).

[0042] The intramedullary nail aiming device for the humerus of the present utility model connects the aiming frame and the intramedullary nail for the humerus through a connecting piece, which is convenient for inserting into the humeral medullary cavity. Moreover, the proximal sleeve cooperates with the aiming frame to ensure coaxiality with the humeral head support screw hole of the intramedullary nail for the humerus, and the distal sleeve cooperates with the aiming frame to ensure coaxiality with the distal screw hole of the intramedullary nail for the humerus, facilitating the implantation of corresponding screws, providing an implantation channel and positioning, with accurate positioning and simple operation. The present utility model is applicable to proximal humerus surgical fracture operations.

[0043] The connecting piece 3 detachably connecting the aiming frame 2 can adopt various structural forms that are easily conceivable by those skilled in the art. The present utility model preferably adopts the following structural form:

[0044] As Figure 1 and Figure 4-5 shown, a first receiving groove 23 for receiving the end of the connecting piece 3 can be provided above the proximal sleeve receiving hole 21 on the aiming frame 2. One end of the connecting piece 3 close to the aiming frame 2 is inserted into the first receiving groove 23, which is convenient for connection and simple in operation.

[0045] Furthermore, a pair of first positioning posts 31 can be provided at one end of the connecting piece 3 close to the aiming frame 2, and a pair of first positioning holes (not shown) cooperating with the pair of first positioning posts 31 are provided in the first receiving groove 23. The pair of first positioning posts 31 and the pair of first positioning holes cooperate with each other, having good connection firmness and can prevent relative rotation between the connecting piece 3 and the aiming frame 2.

[0046] The fixing piece 4 can adopt various structural forms that are easily conceivable by those skilled in the art, such as a snap type; however, for the convenience of implementation, the present utility model preferably adopts the following structural form:

[0047] As Figure 4-6 shown, the fixing piece 4 can be a connecting bolt, and the connecting bolt sequentially includes a threaded section 41 close to the connecting piece 3, a smooth rod section 42 in the middle, and a bolt head section 43 far from the connecting piece 3;

[0048] A threaded hole 32 cooperating with the threaded section 41 is provided at the rear of the connecting piece 3, a bolt hole 24 communicating with the first receiving groove 23 and cooperating with the smooth rod section 42 is provided on the aiming frame 2, and a step 25 for blocking and cooperating with the bolt head section 43 is provided at the bolt hole 24 on the aiming frame 2.

[0049] The connecting piece 3 detachably connecting the intramedullary nail for the humerus 1 can adopt various structural forms that are easily conceivable by those skilled in the art. The present utility model preferably adopts the following structural form:

[0050] As Figure 1 and Figure 5As shown, a second receiving groove 16 for receiving the end of the connecting member 3 may be provided on the humeral head supporting portion 11. One end of the connecting member 3 close to the humeral intramedullary nail 1 is adapted to be inserted into the second receiving groove 16, which is convenient for connection and simple to operate.

[0051] Furthermore, a pair of second positioning posts 33 may be provided at one end of the connecting member 3 close to the humeral intramedullary nail 1, and a pair of second positioning holes (not shown) cooperating with the pair of second positioning posts 33 are provided in the second receiving groove 16. The pair of second positioning posts 33 and the pair of second positioning holes cooperate with each other, providing good connection firmness and preventing relative rotation between the connecting member 3 and the humeral intramedullary nail 1. The connecting member 3 in the present utility model may have a symmetric structure at both ends, and there is no need to distinguish directions during use, which is convenient for use.

[0052] As Figure 7 shown, both the proximal sleeve 5 and the distal sleeve 6 may include an outer sleeve 51 and an inner sleeve 52. A screw channel 53 for allowing a corresponding screw to pass through is provided in the inner sleeve 52 to facilitate providing an implantation channel and positioning for the corresponding screw, with accurate positioning and simple operation.

[0053] A positioning rod 54 may be provided in the screw channel 53. A driving portion 55 is provided at the rear end of the positioning rod 54. The length of the positioning rod 54 is greater than the length of the inner sleeve 52. The design of the positioning rod 54 facilitates inserting into a corresponding screw hole to position the outer sleeve 51 and the inner sleeve 52, and at the same time can be used as an implantation tool for the corresponding screw, with accurate positioning and convenient operation. A positioning tip 511 may be provided at the front end of the outer sleeve 51 to improve the positioning effect. The front end of the inner sleeve 52 may be a tapered shape that gradually narrows from the rear to the front to reduce tissue irritation.

[0054] On the other hand, the present utility model provides a humerus fixation system. As Figure 1-7 shown, it includes a humeral intramedullary nail 1 and the above-mentioned humeral intramedullary nail aiming device. The structure of the humeral intramedullary nail aiming device is the same as above and will not be elaborated here.

[0055] A humeral head supporting portion 11 may be provided at the proximal end of the humeral intramedullary nail 1. A humeral head supporting screw hole 12 for receiving a humeral head supporting screw 13 is provided on the humeral head supporting portion 11. A distal screw hole 14 for receiving a distal screw 15 is provided at the distal end of the humeral intramedullary nail 1.

[0056] In the humerus fixation system of the present utility model, the aiming frame is connected to the humeral intramedullary nail through a connecting member, which is convenient for inserting into the humeral medullary cavity. The proximal sleeve cooperates with the aiming frame to ensure coaxiality with the humeral head supporting screw hole of the humeral intramedullary nail, and the distal sleeve cooperates with the aiming frame to ensure coaxiality with the distal screw hole of the humeral intramedullary nail, facilitating the implantation of corresponding screws, providing an implantation channel and positioning, with accurate positioning and simple operation.

[0057] As Figure 1-2As shown in the figure, a long slot hole 18 for accommodating a proximal screw 17 and extending along the axial direction of the humeral intramedullary nail 1 may be provided below the proximal support portion 11 of the humeral head of the humeral intramedullary nail 1. At this time, the proximal screw 17 can be blindly implanted to a specified position according to the implantation requirements, and the firmness of the humeral intramedullary nail 1 is better. The number of distal screw holes 14 may be at least two and are spaced along the axial direction of the humeral intramedullary nail 1.

[0058] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A humeral intramedullary nail aiming device, characterized in that Comprising an aiming frame arranged in parallel with the humeral intramedullary nail, and a connecting member for connecting the aiming frame and the humeral intramedullary nail, wherein: The front end of the connecting member is for detachably connecting to the proximal end of the humeral intramedullary nail, the rear end of the connecting member is for detachably connecting to the aiming frame, and a fixing member for fixing the connecting member on the aiming frame is provided on the upper part of the aiming frame; A proximal sleeve accommodating hole coaxial with the humeral head support screw hole on the humeral head support part of the humeral intramedullary nail is further provided on the upper part of the aiming frame, and a proximal sleeve for the humeral head support screw in the humeral head support screw hole to pass through is provided in the proximal sleeve accommodating hole; A distal sleeve accommodating hole coaxial with the distal screw hole of the humeral intramedullary nail is provided on the lower part of the aiming frame, and a distal sleeve for the distal screw in the distal screw hole to pass through is provided in the distal sleeve accommodating hole.

2. The humeral intramedullary nail aiming device according to claim 1, wherein A first accommodating groove for accommodating the end of the connecting member is provided above the proximal sleeve accommodating hole on the aiming frame, and one end of the connecting member close to the aiming frame is inserted into the first accommodating groove.

3. The humeral intramedullary nail aiming device according to claim 2, characterized in that, A pair of first positioning posts are provided at one end of the connecting member close to the aiming frame, and a pair of first positioning holes matching with the pair of first positioning posts are provided in the first accommodating groove.

4. The humeral intramedullary nail aiming device according to claim 1, characterized in that A second accommodating groove for accommodating the end of the connecting member is provided on the humeral head support part, and one end of the connecting member close to the humeral intramedullary nail is for being inserted into the second accommodating groove.

5. The humeral intramedullary nail aiming device according to claim 4, characterized in that, A pair of second positioning posts are provided at one end of the connecting member close to the humeral intramedullary nail, and a pair of second positioning holes matching with the pair of second positioning posts are provided in the second accommodating groove.

6. The humeral intramedullary nail aiming device according to claim 2, characterized in that, The fixing member is a connecting bolt, and the connecting bolt successively includes a threaded section close to the connecting member, a smooth rod section in the middle, and a bolt head section far from the connecting member; A threaded hole matching with the threaded section is provided at the rear part of the connecting member, a bolt hole communicating with the first accommodating groove and matching with the smooth rod section is provided on the aiming frame, and a step for blocking and matching with the bolt head section is provided on the aiming frame at the position of the bolt hole.

7. The humeral intramedullary nail aiming device according to any one of claims 1-6, characterized in that, Both the proximal sleeve and the distal sleeve include an outer sleeve and an inner sleeve, and a screw channel for the corresponding screw to pass through is provided in the inner sleeve.

8. The humeral intramedullary nail aiming device according to claim 7, characterized in that, A positioning rod is provided in the screw channel, a driving part is provided at the rear end of the positioning rod, and the length of the positioning rod is greater than the length of the inner sleeve; And / or, a positioning tip is provided at the front end of the outer sleeve; And / or, the front end of the inner sleeve is a tapered shape that gradually narrows from the rear to the front.

9. A humerus fixation system, characterized in that, Comprising a humeral intramedullary nail and the humeral intramedullary nail aiming device according to any one of claims 1-8, wherein: The proximal end of the humeral intramedullary nail is provided with a humeral head support part, a humeral head support screw hole for accommodating a humeral head support screw is provided on the humeral head support part, and a distal screw hole for accommodating a distal screw is provided at the distal end of the humeral intramedullary nail.

10. The humeral fixation system according to claim 9, wherein, A long slot hole for accommodating a proximal screw and extending along the axis direction of the humeral intramedullary nail is provided below the humeral head support part at the proximal end of the humeral intramedullary nail.

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