CN206603814U - A kind of sacrum ilium screw positioning device of Adjustable Range and angle - Google Patents

Abstract

The utility model discloses a sacroiliac nail positioning device capable of adjusting distance and angle, which comprises a guide plate, a distance adjustment sleeve clamped on the guide plate and an angle adjustment device installed on the guide plate. The position on the guide plate can adjust the distance between the distance-adjusting sleeve and the angle adjustment device, and the angle adjustment device can rotate in a plane parallel to the guide plate. Inside the angle adjustment device is an adjustment cavity that penetrates up and down, and the adjustment cavity is set There is a guide sleeve that can adjust the angle in the adjustable inner cavity, and the plane where the guide sleeve adjusts the angle is perpendicular to the plane where the guide plate is located, so as to combine preoperative images and intraoperative fluoroscopy data during the process of screw placement and removal of sacroiliac screws , Properly adjust the distance and angle between the two sleeves, and quickly place the guide pin in the correct position, so as to reduce the number of guide pin insertions and fluoroscopy times, shorten the operation time of sacroiliac screw insertion and removal, and reduce soft tissue damage.

Description

A sacroiliac screw positioning device with adjustable distance and angle

technical field

The utility model belongs to a sleeve for placing sacroiliac nails, in particular to a sacroiliac nail positioning device with adjustable distance and angle.

Background technique

In the operation of sacroiliac joint dislocation, it is often necessary to place two hollow screws to fix the sacroiliac joint. Since the sacroiliac screw is mostly closed, and the back of the pelvis is inclined, it is difficult to insert the guide pin of the hollow nail, and often deviates from the preset track, which increases the number of guide pin insertions and fluoroscopy times, and prolongs the operation. time, increasing local soft tissue damage. The sacroiliac screw generally needs to be removed 6 months after the operation. At this time, it is also necessary to use a guide wire to find the screw hole of the hollow screw, and then use a screwdriver to unscrew it. It can be seen that in the process of sacroiliac screw placement and removal, the correct insertion of the guide wire is very important, which is directly related to the success or failure of the operation and the length of the operation time. In addition, excessive soft tissue damage during nail placement will increase the amount of scar tissue bleeding during nail removal, and even lead to massive bleeding.

Contents of the invention

The purpose of this utility model is to provide a sacroiliac screw positioning device with adjustable distance and angle, so as to properly adjust the distance between the two sleeves by combining preoperative images and intraoperative fluoroscopy data during the process of setting and removing the sacroiliac screw. Quickly place the guide pin in the correct position according to the distance and angle between them, so as to reduce the number of guide pin insertion and fluoroscopy times, shorten the operation time of sacroiliac screw insertion and removal, and reduce soft tissue damage.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a sacroiliac screw positioning device with adjustable distance and angle, including a guide plate, a distance-adjusting sleeve clamped on the guide plate and an angle adjustment device installed on the guide plate , the distance between the distance adjusting sleeve and the angle adjustment device can be adjusted by adjusting the position of the distance adjustment sleeve clamped on the guide plate, and the angle adjustment device can rotate in a plane parallel to the guide plate, and the angle adjustment device is vertically connected The adjustment inner cavity is provided with a guide sleeve that can adjust the angle in the adjustment inner cavity, and the plane where the angle of the guide sleeve is adjusted is perpendicular to the plane where the guide plate is located.

The guide plate adopts a rectangular structure design, and a number of slots are evenly distributed on the top for setting the distance-adjusting sleeve. It is set on the guide plate through the cooperation of the clamping device and the clamping slot.

The length of the guide plate is 8cm, the width is 3cm, and the thickness is 2mm. There is a draw-in groove with a width of 1mm every 1mm on the upper edge of the left half of the top, the draw-in groove 11 is 5mm deep, and the inner diameter of the distance-adjusting sleeve is 4.0mm. The outer diameter is 6.0mm and the length is 6cm.

The guide plate is also provided with a positioning hole, and the guide plate directly below the positioning hole is provided with an arc-shaped positioning groove concentric with the positioning hole. The angle adjustment device is designed as a right-angled trapezoid with a wide top and a narrow bottom. Corresponding to the shape, two fixing columns with screw holes are installed on one side of the trapezoidal surface of the angle adjustment device. The screw holes are perpendicular to the right angle waist of the trapezoid. The fixing columns include the first fixing column and the second fixing column. Screw into the first fixing through the positioning hole, and screw the second bolt into the second fixing column through the positioning groove to realize the installation of the angle adjustment device.

The positioning hole is opened on the right half of the top of the guide plate, with a diameter of 2mm, the distance between the center of the positioning hole and the top of the guide plate is 5mm, the width of the positioning groove is 2mm, the radius is 2cm, and the radian is 60°. The height of the angle adjustment device is 4cm. The wall thickness is 1mm, the top opening of the adjustment cavity is a rectangle of 30mmx6mm, the bottom opening is a rectangle of 7mmx6mm, the distance between the two fixing columns is 2cm, and the inner diameter of the screw hole is 2mm.

The guide sleeve includes a guide tube and a handle installed at one end of the guide tube, and the other end of the guide tube extends into the adjustment cavity, and the height of the guide tube is greater than that of the angle adjusting device.

The opening of one end of the guide tube extending into the inner cavity of the adjustment is serrated for fixing on the surface of the bone.

The guide tube is a hollow circular tube with an inner diameter of 4.0 mm, an outer diameter of 6.0 mm, and a length of 10 cm, and the handle is 6 cm long.

Angle scales are arranged on the guide plate below the positioning groove.

The angle adjustment device is provided with an angle scale on one side perpendicular to the guide plate.

Compared with the prior art, the utility model has at least the following beneficial effects. By clamping the distance adjustment sleeve and the installation angle adjustment device on the guide plate, by clamping the distance adjustment sleeve in different slots on the guide plate, the Adjust the distance between the distance adjusting sleeve and the angle adjustment device. At the same time, the angle adjustment device can rotate in a plane parallel to the guide plate. By adjusting the angle, the horizontal and vertical angles of the guide sleeves can be adjusted, and the distance and angle between the two sleeves can be properly adjusted by combining the preoperative images and intraoperative fluoroscopy data during the placement and removal of the sacroiliac screw. The guide pin can be quickly placed in the correct position, greatly reducing the number of guide pin placement and fluoroscopy times, shortening the operation time of sacroiliac screw placement and removal, and reducing soft tissue damage.

Furthermore, the distance between the slots on the guide plate is only 1 mm, which enables a finer adjustment of the distance between the distance adjustment sleeve and the angle adjustment device.

Furthermore, the angle adjustment device is designed as a right-angled trapezoid with a wide top and a narrow bottom. The bottom opening of the adjustment cavity is slightly larger than the size of the guide tube. Adjust the guide tube angle.

Furthermore, the end of the guide tube is provided with serrations, which can be better fixed on the surface of the bone for insertion of the guide pin.

Further, an angle scale is provided on the guide plate below the positioning groove, and an angle scale is provided on a side surface of the angle adjustment device perpendicular to the guide plate, which can assist the operator to make precise adjustments.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is the rear view of the utility model.

Fig. 3 is a side view of the utility model.

Fig. 4 is a schematic diagram of the structure of the guide plate in the utility model.

Fig. 5 is a schematic diagram of the structure of the adjusting sleeve in the present invention.

FIG. 6 is a top view of FIG. 5 .

Fig. 7 is a schematic diagram of a side structure of the angle adjusting device of the present invention.

Fig. 8 is a schematic diagram of another side structure of the angle adjusting device of the present invention.

Fig. 9 is a structural schematic diagram of the guide sleeve in the utility model.

Fig. 10 is a schematic diagram of the utility model in use.

In the accompanying drawings, 1, guide plate, 11, card slot, 12, positioning hole, 13, positioning slot, 2, distance adjustment sleeve, 21, locking device, 3, angle adjustment device, 31, first fixed column, 32 , the second fixed column, 33, the inner cavity of adjustment, 4, the guide sleeve, 41, the guide pipe, 42, the sawtooth, 43, the handle, 51, the first bolt, 52, the second bolt, 6, the guide pin.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the utility model includes a guide plate 1, a distance adjustment sleeve 2 clamped on the guide plate 1 and an angle adjustment device 3 installed on the guide plate 1, wherein:

As shown in Figure 4, the guide plate 1 adopts a rectangular structure design. The length of the guide plate 1 is 8cm, the width is 3cm, and the thickness is 2mm. There is a slot 11 with a width of 1mm every 1mm on the upper edge of the left half of the top, and the slot 11 is deep. 5mm, the right half of the top of the guide plate 1 is provided with a positioning hole 12, the diameter is 2mm, the distance between the center of the positioning hole 12 and the top of the guide plate 1 is 5mm, and the guide plate 1 directly below the positioning hole 12 is provided with an arc-shaped positioning groove concentric with the positioning hole 12 13. The width of the positioning groove is 2mm, the radius is 2cm, and the arc is 60°; the guide plate 1 below the positioning groove 13 is provided with an angle scale;

As shown in Figures 5 and 6, the distance-adjusting sleeve 2 is a hollow circular tube with an inner diameter of 4.0 mm, an outer diameter of 6.0 mm, and a length of 6 cm; one end of the outer wall is provided with a T-shaped locking device 21;

As shown in Figure 7 and Figure 8, the angle adjustment device 3 is a narrow right-angled trapezoidal structure design with a wide top and a bottom. The shape of the inner cavity 33 corresponds to the shape of the angle adjustment device 3, the top opening of the adjustment inner cavity 33 is a rectangle of 30mmx6mm, and the bottom opening is a rectangle of 7mmx6mm; Column, the screw hole is perpendicular to the right-angled waist of the trapezoid, and the fixed column includes the first fixed column 31 and the second fixed column 32, the distance between the two fixed columns is 2cm, and the inner diameter of the screw hole is 2mm; the other side trapezoidal surface is provided with a guide sleeve 4 Angle scale for adjustment;

As shown in Figure 9, the guide sleeve 4 comprises a guide tube 41 and a handle 43 with a length of 6 cm installed on one end of the guide tube 41. The guide tube 41 is a hollow circular tube with an inner diameter of 4.0 mm, an outer diameter of 6.0 mm and a length of 10 cm. The other end of 41 extends into the adjustment inner cavity 33, and the opening of one end of the guide tube 41 extending into the adjustment inner cavity 33 is serrated for fixing on the bone surface.

As shown in Fig. 1, Fig. 2 and Fig. 3, the distance adjusting sleeve 2 is set on the guide plate 1 through the locking device 21 and the slot 11. In Fig. 3, the first bolt 51 is screwed into the first bolt 51 through the positioning hole 12. Once fixed in 31, the second bolt 52 is screwed into the second fixing column 32 through the positioning groove 13, so that the angle adjustment device 3 is installed on the guide plate 1, and the distance adjusting sleeve 2 is clamped on the guide plate 1 by adjusting In different slots 11, the distance between the adjustable distance sleeve 2 and the angle adjustment device 3 can be adjusted, and the angle adjustment device 3 can rotate in a plane parallel to the guide plate 1, that is, on the guide plate 1 with the positioning hole 12 as the center Rotate, and limit the adjustable angle range of the angle adjustment device 3 by the positioning groove 13, after the adjustment is completed, the position is tightened by bolts, and the guide tube 41 of the guide sleeve 4 stretches into the adjustment inner cavity 33, which can be adjusted with the guide plate 1 Adjust the angle in the vertical plane.

In the utility model, the scale on the left half of the guide plate 1 can be used to adjust the distance between the distance adjusting sleeve 2 and the angle adjustment device 3, and the arc-shaped positioning groove 13 on the right half and the inner cavity of the angle adjustment device 3 can realize two The angle adjustment of the vertical plane can be adjusted in the range of 30° in each direction. The end of the guide tube 41 of the guide sleeve 4 can directly touch the bone surface, so that the guide pin can be driven into the bone according to the predetermined needle insertion point and direction.

During the placement of the sacroiliac screw, the guide sleeve of the present invention has a handle, which can be used for inserting the guide pin 6 alone. After inserting the first guide pin, the position of the guide pin can be observed according to the intraoperative fluoroscopy image. , Whether the direction is satisfactory, if the position and direction are satisfactory, then directly estimate the required distance between the two screws according to the preoperative pelvic inlet and outlet position, and connect the distance adjustment sleeve 2 and the angle adjustment device 3 to the guide plate 1 according to this distance value Then set the distance adjustment sleeve 2 on the first guide pin that has been placed, and insert the second guide pin in parallel through the guide sleeve 4. After the perspective is satisfactory, you can use the hollow drill to drill and screw. Insert sacroiliac screws. After the first guide pin is placed, if the position and direction are not satisfactory, then according to the preoperative image data and intraoperative perspective images, the distance adjustment sleeve and the target sleeve are combined and fixed on the guide plate at an appropriate distance and angle On the first guide pin, drive a guide pin through the guide sleeve. After the fluoroscopy position is satisfactory, pull out the guide pin with an unsatisfactory position, and use the guide pin with a satisfactory position as a mark to drive in with the above method For the next guide pin, after both guide pins are satisfactorily positioned under fluoroscopy, a hollow drill is used to drill a hole and screw in the sacroiliac screw.

As shown in Figure 10, in the actual use process, if you are satisfied with the position of the first guide pin inserted, then the second guide pin can be inserted into the second guide pin more easily by using this combination sleeve. It only needs to be driven in parallel, and there is no need to use the angle adjustment function. Even if the position of the second needle is not satisfactory at the first time, you can pull out the second guide pin and continue to use the first guide pin with a satisfactory position as a reference. After fine-tuning the needle insertion point Just insert the second guide pin in parallel; if you are not satisfied with the position and direction of the first guide pin, use the unsatisfactory guide pin as a reference first, adjust the direction and distance through this device, and insert a guide pin The position and direction of the guide pin are satisfactory. After having a guide pin with a satisfactory position and direction, the first guide pin with an unsatisfactory position and direction can be pulled out. At this time, there is only one guide pin with a satisfactory position and direction on the pelvis. Then use this guide pin as a reference to drive the next guide pin in parallel.

When removing the sacroiliac screw, you can insert the guide pin according to the above method, and then use the screwdriver to remove the sacroiliac screw. When removing the sacroiliac screw, you need to drive the guide pin into the hollow screw first, and then the screwdriver is guided by the guide pin. , accurately find the tail of the sacroiliac screw, and then take out the sacroiliac screw. Clinically, it is difficult to drive the guide wire into the sacroiliac hollow screw. Usually, it needs to be driven in multiple times and repeated fluoroscopy. Using this device, the first After inserting the guide pin for the first time, if the position of the guide pin is not satisfactory through fluoroscopy, the distance and angle between the position to be inserted and the position of the guide pin can be determined through the fluoroscopy image, and then the device is assembled according to the distance and angle obtained from the fluoroscopy. The first unsatisfactory guide wire was used as a reference, and a guide wire was driven into one of the sacroiliac screws. Then pull out the first unsatisfactory guide wire, and refer to the guide wire that has been driven into one sacroiliac screw. A guide wire is also inserted inside, and then the two sacroiliac screws are removed together with a screwdriver through the guide wire.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model.

Claims (10)

1. the sacrum ilium screw positioning device of a kind of Adjustable Range and angle, it is characterised in that including guide plate (1), be fastened on guide plate (1) roll adjustment sleeve (2) on and installed in guide plate (1) upper angle adjusting means (3), is fastened on by adjusting roll adjustment sleeve (2) The distance between position-adjustable roll adjustment sleeve (2) and angle regulator (3) on guide plate (1), and angle regulator (3) Can be the regulation inner chamber (33) of up/down perforation, regulation in the rotation with surface parallel to guide plate (1), angle regulator (3) The pilot sleeve (4) of angle can be adjusted in regulation inner chamber (33) by being provided with inner chamber (33), pilot sleeve (4) regulation angle institute Plane and guide plate (1) where plane it is vertical.

2. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 1 and angle, it is characterised in that described Guide plate (1) is designed using rectangular configuration, and its top is evenly equipped with some necks (11) that roll adjustment sleeve (2) are set for card, roll adjustment set Cylinder (2) is to be provided with T-shaped positioner (21) on hollow round tubular, one end outer wall, and roll adjustment sleeve (2) passes through positioner (21) Coordinate with neck (11) and be arranged on guide plate (1).

3. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 2 and angle, it is characterised in that described A length of 8cm of guide plate (1), a width of 3cm, thickness is 2mm, and its top left one side of something upper limb has wide 1mm neck every 1mm (11), the depth of neck 11 5mm, roll adjustment sleeve (2) the internal diameter 4.0mm, external diameter 6.0mm, a length of 6cm.

4. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 1 and angle, it is characterised in that described It is further opened with being provided with the guide plate (1) immediately below positioning hole (12), positioning hole (12) on guide plate (1) concentric with positioning hole (12) Arc positioning groove (13), angle regulator (3) is the narrow ladder structure of right angle design of top width bottom, regulation inner chamber (33) shape with Two fixations for carrying screw are installed in angle regulator (3) shape correspondence, the side trapezoidal faces of angle regulator (3) Post, screw is vertical with trapezoidal right angle waist, and fixed column includes the first fixed column (31) and the second fixed column (32), the first bolt (51) screwed in through positioning hole (12) in the first fixed column (31), the second bolt (52) screws in second through locating slot (13) and fixed In post (32), the installation of angle regulator (3) is realized.

5. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 4 and angle, it is characterised in that described It is half of that positioning hole (12) is opened in guide plate (1) top right, a diameter of 2mm, and positioning hole (12) center of circle is with guide plate (1) distance from top 5mm, a width of 2mm of locating slot, radius are 2cm, and radian is 60 °, and the angle regulator (3) a height of 4cm, wall thickness 1mm are adjusted The rectangle that inner chamber (33) open top is 30mmx6mm is saved, bottom opening is 7mmx6mm rectangle, and two fixed columns are at a distance of 2cm, spiral shell Hole internal diameter 2mm.

6. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 1 and angle, it is characterised in that described Pilot sleeve (4) includes guide pipe (41) and the handle (43) installed in guide pipe (41) one end, and guide pipe (41) other end is stretched Enter to adjust in inner chamber (33), and guide pipe (41) is highly more than angle regulator (3).

7. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 6 and angle, it is characterised in that described One end that guide pipe (41) stretches into regulation inner chamber (33) is open-ended for for being fixed on bone surface zigzag.

8. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 7 and angle, it is characterised in that described Guide pipe (41) is internal diameter 4.0mm, external diameter 6.0mm, long 10cm hollow circular tube, handle (43) long 6cm.

9. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 1 and angle, it is characterised in that described Angle index is provided with guide plate (1) below locating slot (13).

10. the sacrum ilium screw positioning device of a kind of Adjustable Range according to claim 1 and angle, it is characterised in that institute State angle regulator (3) and be provided with angle index on the one side of guide plate (1).