CN221490162U - A guide device for inserting posterior sacroiliac screws - Google Patents

Abstract

The utility model discloses a screw imbedding guide device behind a sacrum, which comprises a connecting seat, a fixing rod, an angle adjuster, a positioning rod, a guide cylinder and a connecting piece, wherein the fixing seat is detachably and fixedly connected with the rear of the sacrum, the guide cylinder can be used for a guide needle to pass through, one end of the fixing rod is in sliding connection with the connecting seat, the other end of the fixing rod is in rotary connection with the positioning rod, the angle adjuster is arranged between the fixing rod and the positioning rod and is used for adjusting an included angle between the fixing rod and the positioning rod, one end of the connecting piece is in rotary connection with the positioning rod, the other end of the connecting piece is connected with the guide cylinder, the guide cylinder is always vertical to the axis of the positioning rod, the connecting piece can rotate around the axis of the positioning rod, and the guide cylinder synchronously rotates; a telescopic rod for adjusting the distance between the positioning rod and the fixed rod is arranged between the fixed rod and the positioning rod. Through the positioning adjustment, the guide pin can precisely pass through the positioning point, and the positioning step of screw placement is simple and consumes less time.

Description

A guide device for inserting posterior sacroiliac screws

Technical Field

The utility model belongs to the field of medical instruments, and in particular relates to a guide device for inserting posterior sacroiliac screws.

Background Art

At present, sacral fractures are usually caused by severe trauma, such as high-speed traffic accidents, falls, sports injuries or other violent injuries. Sacral fractures are a serious trauma for patients, often accompanied by severe pain, limited mobility and neurological dysfunction. Because the sacrum is at the bottom of the trunk, its treatment is relatively difficult. Commonly used methods for treating posterior pelvic ring injuries in clinical practice include sacroiliac screws (SIS), lumbar pelvic fixation (LPF) and transiliac internal fixators (TIFI). The insertion of screws depends largely on visible and palpable anatomical landmarks, requires multiple fluoroscopic positioning, and takes a long time to perform fluoroscopy, which increases the potential radiation exposure of patients and surgical teams.

Therefore, a new technology is needed to solve the problem that the positioning steps of screw insertion in the prior art are complicated and time-consuming.

Utility Model Content

In order to solve the above problems in the prior art, the utility model provides a sacroiliac posterior screw insertion guide device, which has the advantages of simple positioning steps for screw insertion and short time consumption.

The utility model adopts the following technical solutions:

A posterior sacroiliac screw insertion guide device is suitable for the insertion of iliac screws, S2AI screws, sacral 1 pedicle screws through the iliac wing, etc., comprising a connecting seat, a connecting body, a positioning rod and a guide frame, wherein the connecting seat is used to clamp the sacroiliac bone, one end of the connecting body is slidably fixedly connected to the connecting seat, and the other end is rotatably connected to the positioning rod, when the positioning rod rotates relative to the connecting body, the angle between the positioning rod and the connecting body becomes larger or smaller, the guide frame is rotatably mounted on the positioning rod and uses the axis of the positioning rod as the rotation axis, the guide frame is provided with a guide cylinder for the guide needle to pass through, the guide cylinder is perpendicular to the axis of the positioning rod, and when the guide frame rotates, the relative position of the guide cylinder and the positioning rod changes;

The guide frame is also provided with a connecting sleeve, and the connecting sleeve is sleeved on the positioning rod.

As a further improvement of the technical solution of the utility model, it also includes a first fastener, and the connecting seat is provided with a slot in the shape of a 匚 for the sacral crest to be inserted into, the first fastener passes through a side wall of the slot and is abutted and fixed to the sacral crest, and the side of the connecting seat away from the slot notch is slidably connected to the connecting body.

As a further improvement of the technical solution of the utility model, the connecting body and the connecting seat are respectively provided with guide grooves and protrusions with matching structures, and the protrusions can be slidably inserted into the guide grooves and detachably fixedly connected with the guide grooves.

As a further improvement of the technical solution of the utility model, it also includes a first fixing member, a second fixing member and a first connecting plate, the protrusion is located on a side away from the slot notch, and the two ends of the first connecting plate are respectively detachably fixedly connected to the connecting body and the protrusion;

The first connecting plate is provided with a first slide rail, the first fixing member is inserted into the slide rail and is detachably fixedly connected to the connecting body, the second fixing member is inserted into the slide rail and is detachably fixedly connected to the protrusion, and the connecting body and the protrusion can approach or move away from each other along the slide rail.

As a further improvement of the technical solution of the utility model, it also includes a second connecting plate symmetrically arranged with the first connecting plate, the second connecting plate is provided with a second sliding rail into which the first fixing member and the second fixing member can be inserted, the connecting body and the protrusion are located between the first connecting plate and the second connecting plate, and the space between the first connecting plate and the second connecting plate forms the guide groove.

As a further improvement of the technical solution of the utility model, the first fixing member and the second fixing member are both bolts.

As a further improvement of the technical solution of the utility model, it also includes an angle adjustment component, which includes a dial and a rotating seat. One end of the rotating seat is rotatably connected to the connecting body and is detachably fixedly connected to the positioning rod at this end, and a limiting protrusion is provided at the other end. The end of the dial away from the connecting seat is detachably fixedly connected to the connecting body, and an arc groove is provided on the dial for the limiting protrusion to be inserted, and an angle scale is provided on the dial.

As a further improvement of the technical solution of the utility model, the guide frame includes a first connecting rod and a second connecting rod, and the guide cylinder, the first connecting rod, the second connecting rod, and the connecting sleeve are fixedly connected in sequence.

As a further improvement of the technical solution of the utility model, it also includes a connecting rod, one end of the positioning rod is conical, and the other end is hollow, one end of the connecting rod is detachably fixedly connected to the rotating seat, and the other end is inserted into the center hole of the positioning rod and detachably fixedly connected to the positioning rod, and the distance between the positioning rod and the rotating seat is adjustable.

As a further improvement of the technical solution of the utility model, it also includes a second fastener, which passes through the connecting sleeve and abuts against the outer side of the positioning rod.

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

The angle adjuster is arranged between the fixing rod and the positioning rod and is used to adjust the angle between the connecting body and the positioning rod in the horizontal direction. The required horizontal angle can be determined by imaging treatment before the operation, and the angle between the positioning rod and the connecting body can be adjusted to adapt to the above-mentioned horizontal angle; when the guide frame rotates around the axis of the positioning rod, the angle between the guide cylinder and the connecting body changes accordingly, and the guide cylinder can be adjusted to a suitable angle by rotation. At the same time, the guide needle can be accurately inserted according to the angle designed before the operation through positioning, thereby assisting the insertion of the screw; the distance between the guide cylinder and the connecting body and the angle between the guide cylinder and the connecting body can be adjusted by a connecting sleeve between the connecting body and the positioning rod, so as to point to the needle insertion point on the sacrum designed by imaging before the operation, so that the guide needle can accurately pass through the positioning point. At the same time, through the above-mentioned positioning adjustment, the positioning step of the screw insertion is simple and time-saving.

BRIEF DESCRIPTION OF THE DRAWINGS

The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a front view of the overall structure of the utility model;

Figure 3 is a schematic diagram of the dial structure;

FIG4 is a schematic diagram of the connection structure between the guide frame and the guide cylinder;

FIG5 is a schematic diagram of a connection structure between a connecting rod and a rotating seat at an angle;

FIG. 6 is a schematic diagram of the connection structure between the connecting rod and the rotating seat from another angle.

Reference numerals:

1-connecting seat; 11-slot; 12-bump; 13-first fastener;

2- Connect the main body;

3-angle adjustment assembly; 31-dial; 311-arc groove; 32-rotating seat;

4- Positioning rod;

5-guide cylinder;

6-guide frame; 61-first connecting rod; 62-second connecting rod; 63-connecting sleeve; 64-second fastener;

7-sliding bracket; 71-first connecting plate; 711-first slide rail; 72-second connecting plate; 721-second slide rail; 73-guide groove; 74-first fixing member; 75-second fixing member;

8-Connecting rod;

9-Guide needle.

DETAILED DESCRIPTION

The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, scheme and effect of the utility model. It should be noted that the embodiments and features in the embodiments in this application can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the accompanying drawings.

Referring to Figures 1 to 6, a guide device for inserting screws in the posterior sacroiliac bone is suitable for inserting screws such as iliac screws, S2AI screws, and pedicle screws of the iliac wing sacral 1 from the posterior sacroiliac bone, comprising a connecting seat 1, a connecting body 2, a positioning rod 4, and a guide frame 6. The connecting seat 1 is used to clamp the sacroiliac bone, and the connecting seat 1 is detachably fixedly connected to the sacroiliac bone. One end of the connecting body 2 is slidably fixedly connected to the connecting seat 1, and the other end is rotatably connected to the positioning rod 4. When the positioning rod 4 rotates relative to the connecting body 2, the angle between the positioning rod 4 and the connecting body 2 becomes larger or smaller. When in use, the connecting body 2 is generally arranged horizontally, and the angle between the positioning rod 4 and the connecting body 2 in the horizontal direction can be adjusted by rotating the positioning rod 4 relative to the connecting body 2. When the connecting body 2 slides relative to the connecting seat 1, the distance between the connecting body 2 and the connecting seat 1 becomes larger or smaller, so that the distance between the connection node of the positioning rod 4 and the connecting body 2 and the connecting seat 1 can be adjusted according to actual conditions.

The guide frame 6 is rotatably mounted on the positioning rod 4 and takes the axis of the positioning rod 4 as the rotation axis. The guide frame 6 is provided with a guide cylinder 5 for the guide pin 9 to pass through. The guide cylinder 5 is perpendicular to the axis of the positioning rod 4. When the guide frame 6 rotates, the relative position of the guide cylinder 5 and the positioning rod 4 changes. The position of the guide cylinder 5 relative to the connecting body 2 can be adjusted by rotating the bogie. During the rotation of the guide frame 6, the axis of the guide cylinder 5 is always perpendicular to the axis of the positioning rod 4. The guide frame 6 is also provided with a connecting sleeve 63, which is sleeved on the positioning rod 4. Before the connecting sleeve 63 is fixed to the positioning rod 4, the connecting sleeve 63 can be driven to slide along the length direction of the positioning rod 4 or rotate relative to the positioning rod 4 to realize the rotation and sliding adjustment between the guide frame 6 and the positioning rod 4. The rotation axis of the connecting sleeve 63 when rotating relative to the positioning rod 4 is the axis of the positioning rod 4. The guide cylinder 5 rotates synchronously with the guide frame 6, thereby changing the relative position of the guide cylinder 5 and the positioning rod 5. The position of the guide needle 9 is located by sliding adjustment relative to the connecting body 2, rotating adjustment of the positioning rod 4 relative to the connecting body 2, and sliding and rotating adjustment of the guide frame 6 relative to the positioning rod 4, so as to point to the needle insertion point on the sacrum designed by imaging before the operation, so that the guide needle 9 can accurately pass through the positioning point, and the guide needle 9 can be accurately inserted according to the angle designed before the operation, thereby assisting the insertion of the screw.

Specifically, referring to Figures 1 and 2, the posterior sacroiliac screw insertion guide device of the present solution further includes a first fastener 13, the connecting seat 1 is provided with a slot 11 in a 匚-shaped structure for the sacral crest to be inserted, the first fastener 13 passes through a side wall of the slot 11 and is fixedly abutted against the sacral crest, the side of the connecting seat 1 away from the notch of the slot 11 is slidably fixedly connected to the connecting body 2, and the connecting body 2 can be relatively close to or away from the connecting seat 1, thereby changing the spacing between the guide cylinder 5 and the connecting seat 1. The first fastener 13 can preferably be a screw, and the posterior sacroiliac screw insertion guide device of the present solution is fixed to the posterior sacroiliac bone by screwing in the screw.

Specifically, referring to Figure 1, the connecting body 2 and the connecting seat 1 are respectively provided with a guide groove 73 and a protrusion 12 with matching structures. The protrusion 12 can be slidably inserted into the guide groove 73 and detachably fixedly connected to the guide groove 73. After the protrusion 12 is inserted into the guide groove 73 and the position is adjusted, the protrusion 12 can be fixed in the guide groove 73 by bolt connection.

Specifically, referring to Figures 1 and 2, the posterior sacroiliac screw insertion guide device of the present solution further includes a first fixing member 74, a second fixing member 75 and a first connecting plate 71, the protrusion 12 is located on a side away from the notch of the card slot 11, and the two ends of the first connecting plate are respectively detachably fixedly connected to the connecting body 2 and the protrusion 12. A first slide rail 711 is provided on the first connecting plate, the first fixing member 74 is inserted into the first slide rail and is detachably fixedly connected to the connecting body 2, the second fixing member 75 is inserted into the first slide rail and is detachably fixedly connected to the protrusion 12, and the connecting body 2 and the protrusion 12 can move closer to or farther away from each other along the first slide rail.

Specifically, referring to Figures 1 and 2, the posterior sacroiliac screw insertion guide device of the present solution also includes a second connecting plate 72 symmetrically arranged with the first connecting plate 71, the second connecting plate 72 is provided with a second slide rail 721 for inserting the first fixing member 74 and the second fixing member 75, the connecting body 2 and the protrusion 12 are located between the first connecting plate 71 and the second connecting plate 72, and the space between the first connecting plate 71 and the second connecting plate 72 forms the guide groove 73. The first fixing member 74 and the second fixing member 75 are both bolts. The first fixing member 74 or the second fixing member 75 can slide in the slide rails on both sides, adjust the distance between the connecting seat 1 and the connecting body 2 to a suitable length, and tighten the screws at both ends of the slide rails to fix it.

Specifically, referring to Figures 1 to 3, the posterior sacroiliac screw insertion guide device of the present scheme also includes an angle adjustment component 3, which includes a dial 31 and a rotating seat 32. One end of the rotating seat 32 is rotatably connected to the connecting body 2, and at this end is detachably fixedly connected to the positioning rod 4 with reference to Figures 1, 2 and 4, and the other end is provided with a limiting protrusion. The end of the dial 31 away from the connecting seat 1 is detachably fixedly connected to the connecting body 2, and the dial 31 is provided with an arc groove 311 for inserting the limiting protrusion, and the dial 31 is provided with an angle scale.

Specifically, the guide frame 6 includes a first connecting rod 61 and a second connecting rod 62 , and the guide cylinder 5 , the first connecting rod 61 , the second connecting rod 62 , and the connecting sleeve 63 are fixedly connected in sequence.

Specifically, the posterior sacroiliac screw insertion guide device of the present solution further includes a connecting rod 8, one end of the positioning rod 4 is conical, and the other end is hollow, one end of the connecting rod 8 is detachably fixedly connected to the rotating seat 32, and the other end is inserted into the central hole of the positioning rod 4 and detachably fixedly connected to the positioning rod 4, and the spacing between the positioning rod 4 and the rotating seat 32 is adjustable. Wherein, with reference to Figures 1, 2 and 5, a scale is provided on the connecting rod 8, and when the connecting sleeve 63 is moved along the connecting rod 8, the spacing between the connecting sleeve 63 and the rotating seat 32 can be read through the scale value, so as to facilitate the relative position of the guide cylinder 5 to be adjusted according to the actual design value.

Specifically, the posterior sacroiliac screw insertion guide device of the present solution further includes a second fastener 64, which passes through the connecting sleeve 63 and abuts against the outer side of the positioning rod 4. The second fastener 64 is preferably a screw or a bolt.

For other contents of the sacroiliac posterior screw insertion guide device described in the present invention, please refer to the prior art and will not be repeated here.

The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims (10)

1. A posterior sacroiliac screw insertion guide device, suitable for the insertion of iliac screws, S2AI screws, and sacral 1 pedicle screws through the iliac wing, characterized in that it comprises a connecting seat, a connecting body, a positioning rod and a guide frame, the connecting seat is used to clamp the sacroiliac bone, one end of the connecting body is slidably fixedly connected to the connecting seat, and the other end is rotatably connected to the positioning rod, when the positioning rod rotates relative to the connecting body, the angle between the positioning rod and the connecting body becomes larger or smaller, the guide frame is rotatably mounted on the positioning rod and the axis of the positioning rod is used as the rotation axis, the guide frame is provided with a guide cylinder for the guide needle to pass through, the guide cylinder is perpendicular to the axis of the positioning rod, and when the guide frame rotates, the relative position of the guide cylinder and the positioning rod changes; The guide frame is also provided with a connecting sleeve, and the connecting sleeve is sleeved on the positioning rod. 2. The posterior sacroiliac screw insertion guide device according to claim 1 is characterized in that it also includes a first fastener, and the connecting seat is provided with a slot in the shape of a 匚 for the sacral crest to be inserted into, the first fastener passes through a side wall of the slot and is abutted and fixed to the sacral crest, and the side of the connecting seat away from the slot notch is slidably connected to the connecting body. 3. The posterior sacroiliac screw insertion guide device according to claim 2 is characterized in that: the connecting body and the connecting seat are respectively provided with structurally matching guide grooves and protrusions, and the protrusions can be slidably inserted into the guide grooves and detachably fixedly connected to the guide grooves. 4. The sacroiliac posterior screw insertion guide device according to claim 3, characterized in that it also includes a first fixing member, a second fixing member and a first connecting plate, the protrusion is located on a side away from the slot, and the two ends of the first connecting plate are respectively detachably fixedly connected to the connecting body and the protrusion; The first connecting plate is provided with a first slide rail, the first fixing member is inserted into the slide rail and is detachably fixedly connected to the connecting body, the second fixing member is inserted into the slide rail and is detachably fixedly connected to the protrusion, and the connecting body and the protrusion can approach or move away from each other along the slide rail. 5. The posterior sacroiliac screw insertion guide device according to claim 4 is characterized in that it also includes a second connecting plate symmetrically arranged with the first connecting plate, the second connecting plate is provided with a second slide rail for inserting the first fixing member and the second fixing member, the connecting body and the protrusion are located between the first connecting plate and the second connecting plate, and the space between the first connecting plate and the second connecting plate forms the guide groove. 6. The sacroiliac posterior screw insertion guide device according to claim 5, characterized in that the first fixing member and the second fixing member are both bolts. 7. The posterior sacroiliac screw insertion guide device according to claim 1 is characterized in that it also includes an angle adjustment component, the angle adjustment component includes a dial and a rotating seat, one end of the rotating seat is rotatably connected to the connecting body, and at this end is detachably fixedly connected to the positioning rod, and the other end is provided with a limiting protrusion, the end of the dial away from the connecting seat is detachably fixedly connected to the connecting body, the dial is provided with an arc groove for the limiting protrusion to be inserted, and the dial is provided with an angle scale. 8. The sacroiliac posterior screw insertion guide device according to claim 1, characterized in that the guide frame comprises a first connecting rod and a second connecting rod, and the guide cylinder, the first connecting rod, the second connecting rod, and the connecting sleeve are fixedly connected in sequence. 9. The posterior sacroiliac screw insertion guide device according to claim 7 is characterized in that it also includes a connecting rod, one end of the positioning rod is conical, and the other end is hollow, one end of the connecting rod is detachably fixedly connected to the rotating seat, and the other end is inserted into the center hole of the positioning rod and detachably fixedly connected to the positioning rod, and the distance between the positioning rod and the rotating seat is adjustable. 10. The sacroiliac posterior screw insertion guide device according to claim 1, characterized in that it also includes a second fastener, the second fastener passes through the connecting sleeve and abuts against the outer side of the positioning rod.