CN207708003U - Vertical adjustable fixed point is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin - Google Patents

Abstract

The utility model discloses a vertically adjustable fixed-point staggered distance guide needle aiming at a hollow nail fixing minimally invasive device, which comprises a distance measuring rod, a vertically adjustable staggered distance aiming frame and a combined sleeve; the front end of the vertically adjustable staggered distance aiming frame is perpendicular to the On the distance measuring rod, the end of the vertically adjustable staggered aiming frame is provided with an aiming hook; the combined sleeve vertical range measuring rod is fixed on the range measuring rod, and the combined sleeve is provided with an axial hole for placing the Kirschner wire; the combined sleeve It includes an outer cylinder and an inner cylinder, the inner cylinder moves coaxially in the outer cylinder, and sharp claws are provided at the outlet ends of the inner cylinder and the outer cylinder. The utility model has a vertically adjustable fixed-point staggered guide pin aiming hollow nail fixing system, which breaks through the principle of "two points determine a straight line" of ordinary guide devices in design principles; precision. Using the vertical offset between the key points in the deep path of the guide wire and the landmark points on the corresponding bone surface, the required guide wire path can be determined by adjusting the size and direction of the vertical offset.

Description

Minimally invasive device for vertically adjustable fixed-point staggered guide pin aiming at hollow nail fixation

technical field

The utility model belongs to the field of orthopedic surgery equipment, relates to an orthopedic minimally invasive device, in particular to a guide pin aimer and a hollow nail fixing system designed by a vertically adjustable fixed-point misdistance method

Background technique

For fractures of irregular bones such as scapula, pelvis, acetabulum, femoral neck, scaphoid, spine, etc., especially those located deep in, close to important organizers such as spinal cord, nerves, and vascular organs, minimally invasive, precise, and safe implantation Inserting screws remains a huge challenge.

Among the existing sights and guides, the most common one is designed by using the principle that two points determine a straight line, but it cannot be used for fractures that can only reveal the entry point of the nail and not easy to reveal the exit point; if an adjustable angle is used Although the guide device can adjust the direction of the guide needle, the angle is not accurate, and a very small angle deviation can cause a large deviation of the guide needle, resulting in adverse consequences such as deviation of the guide needle, breaking through the bone cortex, and damage to important organs. . At present, there is still a lack of minimally invasive, precise, and safe screw guiding devices for fractures that are not easy to reveal the point of penetration.

Utility model content

The purpose of the utility model is to provide a vertically adjustable fixed-point staggered distance guide needle aimed at a hollow nail fixing minimally invasive device with simple structure, convenient use, safety, reliability, precision, improved operation efficiency, and increased operation safety.

In order to achieve the above purpose, the technical solution of the present utility model is to provide a vertically adjustable fixed-point staggered distance guide pin aiming hollow nail fixation minimally invasive device, which includes a distance measuring rod, a vertically adjustable staggered distance aiming frame and a combined sleeve; The front end of the vertically adjustable staggered aiming frame moves vertically on the distance measuring rod through the slider, and the end of the vertically adjustable staggered range aiming frame is provided with an aiming hook; the vertical ranging rod of the combined sleeve is fixed on the ranging rod, and the combination The sleeve is provided with an axial hole for placing the Kirschner wire; the combined sleeve includes an outer cylinder and an inner cylinder, the inner cylinder moves coaxially in the outer cylinder, and sharp claws are provided at the outlet ends of the inner cylinder and the outer cylinder.

Further, the distance measuring rod is provided with a scale, which is convenient for adjusting the vertical distance from the tip of the aiming hook on the vertically adjustable staggered sighting frame to the sighting frame.

Further, the aiming hook is perpendicular to the vertically adjustable staggered aiming frame.

Further, the combined sleeve is parallel to the vertically adjustable staggered sight frame.

Further, the combined sleeve includes an outer cylinder and an inner cylinder, the inner cylinder moves coaxially in the outer cylinder, and the outlet ends of the inner cylinder and the outer cylinder are provided with sharp claws, which are conducive to pushing away the muscles during the operation, The Kirschner wire is fixed in the inner axial hole of the inner cylinder. After the outer cylinder is fixed, the Kirschner wire is fixed in the inner cylinder and operated inside the outer cylinder, effectively avoiding damage to the surrounding tissues.

Further, both the vertically adjustable staggered aiming frame and the combined sleeve can be fixed on the distance measuring rod by adjusting the locking bolt.

Further, the inner cylinder is provided with an axial hole for placing a Kirschner wire. The inner cylinder has at least two layers (middle cylinder and small cylinder). The axial hole of the innermost small cylinder matches the outer diameter of the Kirschner wire to fix the Kirschner wire. The inner diameter of the middle cylinder matches the outer diameter of the hollow drill. It acts as a guide for the hollow drill to ensure that the direction of the hollow drill does not deviate at all times, achieving the purpose of high-precision drilling.

The utility model has the following beneficial effects:

1. The utility model's vertically adjustable fixed-point staggered guide pin aiming at the hollow nail fixing system breaks through the principle of "two points determine a straight line" of ordinary guide devices in design principle; accuracy of the device. Using the vertical offset between the key points in the deep path of the guide wire and the landmark points on the corresponding bone surface, the required guide wire path can be determined by adjusting the size and direction of the vertical offset.

2. It only needs to puncture to the bone surface marker points corresponding to the nail entry point and the key point, and then the operation can be performed, which provides technical support for minimally invasive surgery.

3. The operation can successfully and accurately implant guide pins and hollow nails at one time without relying on X-ray fluoroscopy and navigation. It is not only easy to operate, accurate in operation, but also safe and reliable.

4. During the operation, there is no need to repeatedly see through the hollow nail to check whether the position of the hollow nail is accurate, nor will it penetrate the cortex of the bone, break through the articular cartilage, damage the organs, cause iatrogenic damage, and reduce the pain of the patient.

5. For fractures of irregular bones such as scapula, pelvis, acetabulum, femoral neck, scaphoid, and spine, especially those located deep in, adjacent to spinal cord, nerves, and vascular organs, etc., it can be minimally invasive, precise, and Securely implant the screw.

6. After the outer cylinder of the utility model is fixed, operations such as drilling into the Kirschner wire through the inner cylinder, drilling into the hollow drill, sounding and screwing in the screws are all carried out in the outer cylinder, effectively avoiding damage to surrounding tissues.

Description of drawings

Fig. 1 is a structural schematic diagram of a vertically adjustable fixed-point staggered distance guide needle aiming at a hollow nail to fix a minimally invasive device of the present invention;

In the figure: 1. Range measuring rod; 2. Slider; 3. Adjusting locking bolt; 4. Vertically adjustable staggered aiming frame; 5. Aiming hook; 6. Sharp claw; 7. Combined sleeve.

Detailed ways

In order to describe in detail the technical content and structural features of the vertically adjustable fixed-point staggered guide pin aiming hollow nail fixing system of the present invention, the following will be further explained in conjunction with the embodiment and accompanying drawings.

As shown in Figure 1, the utility model vertically adjustable fixed-point staggered distance guide pin aiming at the hollow nail fixed minimally invasive device is composed of a distance measuring rod 1, a vertically adjustable staggered distance aiming frame 4 and a combined sleeve 7; the vertically adjustable staggered distance The front end of the aiming frame 4 moves vertically on the distance measuring rod 1 through the slider 2, and the end of the vertically adjustable staggered aiming frame 4 is provided with an aiming hook 5; the vertical range measuring rod of the combined sleeve 7 is fixed on the ranging rod 1, and the combination The sleeve 7 is provided with an axial hole for placing a Kirschner wire. The distance measuring rod 1 is provided with a scale, which is convenient for adjusting the stagger (vertical distance) from the aiming hook on the vertically adjustable staggered aiming frame to the aiming frame. The aiming hook 5 is perpendicular to the vertically adjustable staggered aiming frame 4. The combined sleeve 7 is parallel to the vertically adjustable staggered range aiming frame 4 .

The combined sleeve 7 includes an outer cylinder and an inner cylinder. The inner cylinder moves coaxially in the outer cylinder. The outlet ends of the inner cylinder and the outer cylinder are provided with sharp claws 6. The sharp claws are conducive to pushing away the muscles during the operation and restraining the muscles. The wires are fixed in the axial lumen of the inner cylinder. After the outer cylinder is fixed, the Kirschner wires are fixed in the inner cylinder and operated inside the outer cylinder, effectively avoiding damage to the surrounding tissues. The inner cylinder has at least two layers (middle cylinder and small cylinder). The axial hole of the innermost small cylinder matches the outer diameter of the Kirschner wire to fix the Kirschner wire. The inner diameter of the middle cylinder matches the outer diameter of the hollow drill. It acts as a guide for the hollow drill to ensure that the direction of the hollow drill does not deviate at all times, achieving the purpose of high-precision drilling.

Both the vertically adjustable staggered aiming frame 4 and the combined sleeve 7 can be fixed on the distance measuring rod 1 by adjusting the locking bolt 3 .

The usage steps of the vertically adjustable fixed-point staggered distance guide pin aiming at the hollow nail fixing minimally invasive device of the utility model are as follows:

1. First determine the entry point;

2. Determine the landmark points corresponding to the key points in the deep path required by the guide pin on the bone surface;

3. Determine the dihedral angle formed by the plane where the device of the present invention is located and the surface of the bone;

4. Determine the distance from the bone surface marker point to the key point (i.e. the so-called "staggered distance" of the utility model);

5. According to the required misalignment, adjust the distance between the tip of the vertical aiming hook in the aiming frame and the axis of the guide pin outside the body, and lock it;

6. Place the utility model on the surface of the bone, make the tip of the vertical aiming hook at the key mark point, and the guide needle tip in the sleeve at the nail entry point, and rotate the utility model plane to the required angle;

7. The guide pin is drilled into the appropriate length according to the direction of the axial hole of the inner cylinder;

8. Take out the innermost small tube, and then drill into the hollow drill along the direction of the guide pin to an appropriate length;

9. After the hollow drill is inserted, take out the middle barrel to ensure that the direction of the hollow drill does not deviate from time to time, so as to achieve the purpose of high-precision drilling, and measure the length of the required screw in the outer barrel;

10. Screw in the screw in the outer sleeve along the direction of the guide pin.

The above disclosures are only preferred embodiments of the present utility model, and of course the scope of rights of the present utility model cannot be limited by this, so equivalent changes made according to the claims of the present utility model still belong to the scope covered by the present utility model .

Claims (6)

1. vertical adjustable fixed point is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, it is characterised in that：Including ranging rod, vertically Adjustable mistake is away from diopter and combined sleeve；The vertical adjustable mistake is vertically moved by sliding block in survey away from diopter front end Away from bar, vertical adjustable mistake is equipped with away from diopter end and aims at hook；The vertical ranging rod of the combined sleeve is fixed on ranging rod On, the axial hole for placing Kirschner wire is equipped in combined sleeve；Combined sleeve includes outer barrel and inner cylinder, and inner cylinder is coaxially active in outer barrel Interior, the outlet end of inner barrel and outer barrel is equipped with point pawls.

2. vertical adjustable fixed point as described in claim 1 is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, feature exists In：The ranging rod is equipped with scale.

3. vertical adjustable fixed point as described in claim 1 is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, feature exists In：The aiming hook is perpendicular to vertical adjustable mistake away from diopter.

4. vertical adjustable fixed point as described in claim 1 is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, feature exists In：The combined sleeve is parallel to vertical adjustable mistake away from diopter.

5. vertical adjustable fixed point as described in claim 1 is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, feature exists In：The inner cylinder is at least two layers, and the axial hole size of innermost layer is matched with Kirschner wire outer diameter.

6. vertical adjustable fixed point as described in claim 1 is wrong to aim at the minimally invasive device of hollow nail fixation away from guide pin, feature exists In：The vertical adjustable mistake is fixed on by adjusting clamping screw on ranging rod away from diopter, combined sleeve.