CN213249611U

CN213249611U - Percutaneous pelvis front column intramedullary nail

Info

Publication number: CN213249611U
Application number: CN202021969847.8U
Authority: CN
Inventors: 易成腊; 尹恩志; 方艳志
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-05-25
Anticipated expiration: 2030-09-10

Abstract

The utility model discloses a percutaneous pelvis front column intramedullary nail, which comprises an intramedullary nail body, wherein the intramedullary nail body comprises a locking end and a guiding end, the locking end and the guiding end are integrally formed and fixedly connected, and the guiding end is arc-shaped; a connecting part is arranged between the locking end and the guiding end, and the connecting part is gradually thinned from near to far and is connected with the arc-shaped main body; the tail part of the guide end is provided with a bending part; the locking end is provided with a locking nail hole. The intramedullary nail of the utility model conforms to the anatomical structure of the pelvis front column and is reliable in fixation; in the operation, the intramedullary nail is slightly knocked into the front column of the pelvis, so that the operation risk is small; the operation time is short, the adverse effect of radiation generated by fluoroscopy in the operation on the health of a doctor is reduced, the success rate of the operation is high, and the injury to a patient is small.

Description

Percutaneous pelvis front column intramedullary nail

Technical Field

The utility model belongs to the technical field of medical instrument, involve fracture fixing device, concretely relates to percutaneous pelvis front column intramedullary nail.

Background

The pelvis is composed of left and right hip bones, sacrum and coccyx, and is connected with left and right thighbones through hip joints. The anterior half-lateral ilium of the anterior superior iliac spine extends forwards to the pubis through the iliopectineal eminence to form a front column, the posterior half-lateral ilium of the posterior superior iliac spine extends to the ischial tuberosity through the ischial spine to form a rear column, and the posterior half-lateral ilium is firmly clamped on the femur through the acetabulum in a herringbone structure. When a person walks upright, the weight of the trunk is transferred to the two lower limbs through the structure. The integrity of the anterior column plays a very important role in maintaining the stability of the pelvic ring.

The main problems in the prior art include:

for the treatment of anterior column fractures, current fixation methods include anterior column screws, bone plates, external fixators, and Infix. Among them, the front pillar screw has the problems that: because the pelvis front column is in an irregular arc structure in anatomy, the technical difficulty is high, the blood vessels at the pelvis part are rich, and the technical requirements of an operating doctor for safely placing the screws are high due to the long screws and poor plasticity; in order to safely insert the screw, the direction of the kirschner wire needs to be adjusted by repeated perspective in the operation, so that the health of a doctor is greatly damaged; in the operation process, the screw needs to be placed after the kirschner wire is used for positioning, and the operation time is long. The fixed pubis branch that needs to cut open of coaptation board exposes, and then causes the hemorrhage in the patient art, has increased the risk of infection, and the damage that causes the patient is great. The biomechanical stability of the external fixing frame and the Infix is relatively poor, and the bed-lying time of the patient is prolonged.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a percutaneous pelvis front column intramedullary nail, which is more stable and reliable after being implanted into the pelvis front column, and the intramedullary nail is slightly knocked into the pelvis front column in the operation, so that the risk of the operation is small; the operation time is short, the adverse effect of radiation generated by fluoroscopy in the operation on the health of a doctor is reduced, the success rate of the operation is high, and the injury to a patient is small.

Therefore, the utility model adopts the following technical scheme:

the utility model discloses a percutaneous pelvis front column intramedullary nail, which comprises an intramedullary nail body, wherein the intramedullary nail body comprises a locking end and a guiding end, the locking end and the guiding end are integrally formed and fixedly connected, and the guiding end is arc-shaped; a connecting part is arranged between the locking end and the guide end, and the connecting part is gradually thinned from near to far and is connected with the guide end main body; the tail part of the guide end is provided with a bending part; the locking end is provided with a locking nail hole.

Preferably, the arc of the guide end body is 0-40 °.

Preferably, the locking end is a hollow structure, and the guide end and the connecting portion are solid structures.

Preferably, the number of the nail holes is 2, and the nail holes are arranged along the long axis direction of the locking end.

Preferably, the locking nail hole is provided with a matched screw.

Preferably, the arc-shaped main body and the bending part adopt streamline smooth transition.

Preferably, the bend at the tail part of the guide end is gradually tapered and blunted from far to near, and the shape of the bend is similar to a bullet head shape, and the radian is about 15 degrees.

Preferably, the top of locking end both sides all has seted up outside apparatus connecting groove, respectively about one for with outside aiming at the apparatus and be connected.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the intramedullary nail has a certain radian and conforms to the anatomical structure of the pelvis front column; the intramedullary nail has certain plasticity, the direction can be adjusted according to the needs in the pubis when being implanted, the needle insertion point and the needle insertion direction do not need to be reselected, and the difficulty of the operation is reduced; in the operation, the intramedullary nail is slightly knocked into the pelvis front column and enters in the front column bone, and compared with the Kirschner wire guide pin, the intramedullary nail is not easy to penetrate out of the cortex, so that the operation safety is improved; percutaneous fixation and small surgical incision, and reduces the bleeding amount and the risk of infection of patients.

(2) The tail end locking device can prevent the intramedullary nail from backing out and rotating, and is reliable in fixation.

(3) Simple structure, convenient to use has reduced the technical requirement to the operation doctor.

Drawings

Fig. 1 is a schematic structural view (side view) of a percutaneous pelvic anterior intramedullary nail provided by the present invention.

Fig. 2 is a schematic structural diagram (top view) of a percutaneous pelvic anterior intramedullary nail provided by the present invention.

Fig. 3 is a schematic structural view of a percutaneous pelvic anterior intramedullary nail according to an embodiment of the present invention.

Fig. 4 is an assembly view of a percutaneous pelvic anterior intramedullary nail provided by the present invention.

Description of reference numerals: 1. a locking end; 1.1, connecting grooves of external instruments; 1.2, locking nail holes; 1.3, screws; 2. a connecting portion; 3. a guide end; 3.1, a guide end main body; 3.2, bending part.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are only used for explaining the present invention, but not for limiting the present invention.

As shown in fig. 1 and 2, the utility model discloses a percutaneous pelvic anterior intramedullary nail, which comprises an intramedullary nail body, wherein the intramedullary nail body comprises a locking end 1 and a guiding end 3, the locking end 1 and the guiding end 3 are integrally formed and fixedly connected, and the guiding end main body 3.1 is arc-shaped; a connecting part 2 is arranged between the locking end 1 and the guide end 3, and the connecting part 2 is gradually thinned from near to far and is connected with a guide end main body 3.1; the tail part of the guide end 3 is provided with a bent part 3.2; and the locking end 1 is provided with a locking nail hole 1.2.

Specifically, the radian of the guide end main body 3.1 is 0-40 degrees.

Specifically, the locking end 1 is a hollow structure, and the guiding end 3 and the connecting portion 2 are solid structures.

Specifically, the number of the nail holes 1.2 is 2, and the nail holes are arranged along the long axis direction of the locking end 1.

Specifically, the locking nail hole 1.2 is provided with a matched screw 1.3.

Specifically, the leading end body 3.1 and the bent part 3.2 adopt streamline smooth transition.

In particular, the curved portion 3.2 tapers and dulls from distal to proximal, approximately bullet-shaped with an arc of about 15 °.

Specifically, the top of locking end 1 both sides has all seted up outside apparatus spread groove 1.1, respectively one about, is used for aiming the apparatus with outside and is connected.

Examples

As shown in fig. 1-4, the utility model discloses a percutaneous pelvic anterior intramedullary nail, which comprises an intramedullary nail body, wherein the intramedullary nail body comprises a locking end 1 and a guiding end 3, the locking end 1 and the guiding end 3 are integrally formed and fixedly connected, and the guiding end 3 is arc-shaped; a connecting part 2 is arranged between the locking end 1 and the guide end 3, and the connecting part 2 is gradually thinned from near to far and is connected with a guide end main body 3.1; the tail part of the guide end 3 is provided with a bent part 3.2; and the locking end 1 is provided with a locking nail hole 1.2. The bending part 3.2 is gradually thinned and blunted from far to near, the shape is similar to a bullet head, the diameter is 2.5mm, and the radian is about 15 degrees. The total length of the intramedullary nail is 110mm, 120mm and 130 mm. Two screw locking holes with the diameter of 2.8mm are arranged on the locking end 1. The top of locking end 1 both sides has all been seted up outside apparatus spread groove 1.1, controls one respectively, can be connected with outside sighting device. The guiding end 3 can be shaped to a certain extent according to the needs of the operation. The main body 3.1 of the guide end and the bending part 3.2 adopt streamline smooth transition. The percutaneous pelvis front column intramedullary nail is made of titanium alloy. When the external aiming device of the intramedullary nail is connected with the main nail, the bending part 3.2 can adjust the direction in the pubis along with the rotation of the external aiming device. During operation, the intramedullary nail is slightly knocked into the front pelvic column, whether the intramedullary nail is in the bone is observed in an intraoperative perspective mode, if the intramedullary nail is found to penetrate out of the bone immediately, the direction of the nail is changed along with the change of the direction of the aiming instrument, and therefore the nail is sequentially carried out, and the nail is ensured to be in the bone all the time; the front column screw can only be straightly inserted, the direction of the front column screw cannot be changed in the bone, and only the needle inserting point can be reselected or the nail can be withdrawn to change the needle inserting direction.

The working principle of the utility model is as follows:

when the utility model is used, the tail part of the guide end 3 is provided with a bending part 3.2 which is gradually thinned and dulled from far to near, the shape is similar to a bullet head shape, the intramedullary nail can more easily enter the inside of the cortical bone of the pelvis front column, meanwhile, the intramedullary nail can be effectively prevented from entering the acetabulum, the connecting part 2 is gradually thinned when moving, the risk of nail breakage in the process of the intramedullary nail entering the cortical bone can be reduced, the connecting part 2 and the guide end 3 are both solid structures, the strength of the intramedullary nail can be increased, the biomechanical strength is high, and the stability of the front column after operation can be maintained; the intramedullary nail is slightly knocked into the pelvis front column in the operation, the shape of the intramedullary nail is arc-shaped, and the tail part of the intramedullary nail is a small elbow of 15 degrees, so that the intramedullary nail can be effectively prevented from penetrating out of the cortex of the bone, and the safety of the operation is improved. In addition, the design of two screws at the locking end of the intramedullary nail can greatly increase the firmness of the intramedullary nail and prevent the displacement or the falling off of the intramedullary nail in the postoperative recovery process of a patient. The utility model discloses more accord with the human body structure of pelvis front-column, the intramedullary nail can the moulding design of certain degree, has shortened the time of operation, has reduced the adverse effect that radiation caused to doctor's health in the art simultaneously. The operation incision is small, and the postoperative recovery effect of the patient is good.

The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A percutaneous pelvis front column intramedullary nail comprises an intramedullary nail body, and is characterized in that: the intramedullary nail comprises an intramedullary nail body and a nail body, wherein the intramedullary nail body comprises a locking end (1) and a guide end (3), the locking end (1) and the guide end (3) are integrally formed and fixedly connected, and the guide end main body (3.1) is arc-shaped; the tail part of the guide end (3) is provided with a bending part (3.2), a connecting part (2) is arranged between the locking end (1) and the guide end (3), and the connecting part (2) is gradually thinned from near to far and is naturally connected with the guide end main body (3.1); the locking end (1) is provided with a locking nail hole (1.2).

2. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the radian of the guide end main body (3.1) is 0-40 degrees.

3. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the locking end (1) is of a hollow structure, and the guide end (3) and the connecting portion (2) are of solid structures.

4. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the number of the lock pin holes (1.2) is 2, and the lock pin holes are arranged along the long axis direction of the locking end (1).

5. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the locking nail hole (1.2) is provided with a screw (1.3) matched with the locking nail hole.

6. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the guide end main body (3.1) and the bending part (3.2) adopt streamline smooth transition.

7. The percutaneous anterior pelvic intramedullary nail of claim 1, wherein: the bending part (3.2) gradually tapers and becomes blunt from far to near, the shape is similar to a bullet head, and the radian is about 15 degrees.

8. The percutaneous anterior pelvic intramedullary nail of any one of claims 1-7, wherein: outside apparatus spread groove (1.1) have all been seted up at the top of locking end (1) both sides, respectively one about, be used for aiming the apparatus with the outside and be connected.