CN213098247U

CN213098247U - Spine minimally invasive step-by-step dilator

Info

Publication number: CN213098247U
Application number: CN202020896159.7U
Authority: CN
Inventors: 王猛; 刘色荣; 郭少波
Original assignee: Shenzhen World Surgery Medical Device Technology Co ltd
Current assignee: Shenzhen World Surgery Medical Device Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-05-04
Anticipated expiration: 2030-05-25

Abstract

The utility model provides a backbone wicresoft expands expander step by step, including cup jointing the first order expansion sleeve, second level expansion sleeve and the third level expansion sleeve that set up in proper order, wherein first order expansion sleeve is equipped with first order uide bushing hole, can pass the guide pin. Increase step by step between the tertiary expansion sleeve, play the effect of expansion and direction, be convenient for follow-up and guide pin and opening awl cooperation use to confirm the position of planting the nail and pedicle of vertebral arch screw entry angle. All be equipped with the scale on first order expansion sleeve, second level expansion sleeve and the third level expansion sleeve, can know the passageway degree of depth and the expansion condition fast. The first end part of the third-stage expansion sleeve is in a sawtooth shape, so that periosteum can be directly cut and fixed in cortical bone of the vertebral pedicle, a channel is established, and preliminary positioning and subsequent operation of the implanted nail are facilitated. The third stage of expansion sleeve is provided with an armrest part, so that the whole channel is convenient to fix, and the operation visual field and the operation space are increased.

Description

Spine minimally invasive step-by-step dilator

Technical Field

The utility model relates to the field of medical equipment, concretely relates to spine wicresoft is expander step by step.

Background

In the percutaneous minimally invasive spine surgery, the establishment of a nail implanting channel is very important, the positioning is required to be accurate, and the handrail is stable; in the prior art, step-by-step dilators are generally needed for establishing a minimally invasive spinal surgery channel, the fixing mode of the whole device is divided into manual holding, fixing by means of other supports in an operating room and the like, and the problems of inaccurate positioning, insufficient stability, unsatisfactory soft tissue separation and the like exist in the existing establishment of the spinal surgery channel.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a spine wicresoft is expander step by step has the characteristics of location accuracy, stability well and soft tissue separation ideal.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a minimally invasive spinal step-by-step dilator comprising: a first stage expansion sleeve, a second stage expansion sleeve and a third stage expansion sleeve,

the first-stage expansion sleeve is provided with a first end part serving as an insertion end, a second end part opposite to the first end part and a first-stage guide sleeve hole penetrating through the first end part and the second end part, the first-stage guide sleeve hole is used for penetrating a guide pin, a first graduated scale close to the first end part and a second graduated scale close to the second end part are arranged on the first-stage expansion sleeve, and the second graduated scale is used for being matched with the guide pin in a contrasting manner;

the second-stage expansion sleeve is provided with a first end serving as an insertion end, a second end opposite to the first end and a second-stage guide sleeve hole penetrating through the first end and the second end, the second-stage expansion sleeve is sleeved on the first-stage expansion sleeve in a guide mode through the second-stage guide sleeve hole, and a third scale is arranged on the second-stage expansion sleeve;

the third stage expansion sleeve is provided with a first end serving as an insertion end, a second end opposite to the first end and a third stage guide sleeve hole penetrating through the first end and the second end, the third stage expansion sleeve is sleeved on the second stage expansion sleeve through the third stage guide sleeve hole in a guide mode, the first end of the third stage expansion sleeve is in a sawtooth shape, the second end of the third stage expansion sleeve outwards extends along the radial direction to form a handrail part, and a fourth graduated scale is arranged on the third stage expansion sleeve.

Furthermore, two first-stage guide sleeve holes of the first-stage expansion sleeve are arranged and are parallel to each other.

Further, the first end of the first stage expansion sleeve is arranged in a conical shape.

Further, the first end of the second stage expansion sleeve is arranged in a conical shape.

Furthermore, the third-stage expansion sleeve is provided with two handrail parts, and the two handrail parts extend reversely.

Furthermore, a connecting through hole is formed in the armrest part of the third-stage expansion sleeve.

Through the utility model provides a technical scheme has following beneficial effect:

1. increase step by step between first order expansion sleeve, second grade expansion sleeve and the third grade expansion sleeve, play the effect of expansion and direction, be convenient for follow-up and guide pin and opening awl cooperation use to confirm the position of planting the nail and pedicle of vertebral arch screw entry angle.

2. All be equipped with the scale on first order expansion sleeve, second level expansion sleeve and the third level expansion sleeve, can know the passageway degree of depth and the expansion condition fast, simple structure.

3. The first end part of the third-stage expansion sleeve is in a sawtooth shape, so that periosteum can be directly cut and fixed in cortical bone of the vertebral pedicle, a channel is established, and preliminary positioning and subsequent operation of the implanted nail are facilitated.

4. The third stage of expansion sleeve is provided with an armrest part, so that the whole channel is convenient to fix, and the operation visual field and the operation space are increased.

The scheme has the characteristics of accurate positioning, good stability and ideal soft tissue separation.

Drawings

FIG. 1 is a schematic structural view of a minimally invasive spinal incremental dilator according to an embodiment;

FIG. 2 is a cross-sectional view of a minimally invasive spinal step dilator in an embodiment;

FIG. 3 is a cross-sectional view of another orientation of the minimally invasive spinal incremental dilator of an embodiment; wherein the cut line of the cross-sectional view of FIG. 3 is perpendicular to the cut line of the cross-sectional view of FIG. 2;

FIG. 4 is a side view of the first stage expansion sleeve of the embodiment;

FIG. 5 is a side view of the second stage expansion sleeve of the embodiment;

FIG. 6 is a side view of the third stage expansion sleeve of the embodiment;

FIG. 7 is a top view of the first stage expansion sleeve of the embodiment;

FIG. 8 is a top view of the second stage expansion sleeve of the embodiment;

FIG. 9 is a top view of the third stage expansion sleeve of the example embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 9, the present embodiment provides a minimally invasive spinal cascade dilator, including a first cascade dilating sleeve 10, a second cascade dilating sleeve 20 and a third cascade dilating sleeve 30.

The first-stage expanding sleeve 10 has a first end portion 11 (as a lower end portion in fig. 4) serving as an insertion end, a second end portion 12 (as an upper end portion in fig. 4) opposite to the first end portion 11, and a first-stage guide trepanning 101 penetrating through the first end portion 11 and the second end portion 12, the first-stage guide trepanning 101 is used for guiding a needle, and the first-stage expanding sleeve 10 is provided with a first scale 13 close to the first end portion 11 and a second scale 14 close to the second end portion 12, specifically, in this embodiment, the range of the first scale 13 is 0-120mm, and the range of the second scale 14 is 0-70 mm. The second graduated scale 14 is used for contrasting and matching with a graduated scale on the guide pin, so that the subsequent visual observation of the insertion depth of the guide pin is facilitated. In operation, the first stage of the expandable sleeve 10 is inserted, and the insertion depth and the expansion condition can be visually confirmed through the first graduated scale 13.

The second-stage expansion sleeve 20 has a first end 21 (as a lower end in fig. 5) serving as an insertion end, a second end 22 (as an upper end in fig. 5) opposite to the first end 21, and a second-stage guide sleeve hole 201 penetrating the first end 21 and the second end 22, and the second-stage expansion sleeve 20 is guided and sleeved on the first-stage expansion sleeve 10 through the second-stage guide sleeve hole 201, that is, the second-stage expansion sleeve 20 is inserted into the first-stage expansion sleeve 10 through the guide and fit of the second-stage guide sleeve hole 201 and the first-stage expansion sleeve 10, so as to realize further expansion. And a third scale 23 is arranged on the second-stage expansion sleeve 20. Specifically, the range of the third scale 23 is 0-120mm as the first scale. The insertion depth and the expansion condition of the second stage expansion sleeve 20 can be visually confirmed by the third scale 23.

The third stage expansion sleeve 30 has a first end 31 (as a lower end in fig. 6) as an insertion end, a second end 32 (as an upper end in fig. 6) opposite to the first end 31, and a third stage guide sleeve hole 301 penetrating the first end 31 and the second end 32, and the third stage expansion sleeve 30 is guided and sleeved on the second stage expansion sleeve 20 through the third stage guide sleeve hole 301, that is, the third stage expansion sleeve 30 is inserted through the guide cooperation of the third stage guide sleeve hole 301 and the second stage expansion sleeve 20, so as to realize further expansion. The first end 31 of the third stage expansion sleeve 30 is in a sawtooth shape, so that direct periosteum incision and fixation in cortical bone of the pedicle of vertebral arch are facilitated, a channel is established, and preliminary positioning and subsequent operation of the implanted nail are facilitated.

The second end 32 of the third stage expansion sleeve 30 extends outwards along the radial direction to form a handrail portion 34, so that the whole channel can be conveniently held and fixed in a handheld mode, meanwhile, the handrail portion 34 is located on the periphery of the sleeve, the view line cannot be shielded, and the operation view and the operation space are enlarged.

And a fourth graduated scale 33 is arranged on the third stage expansion sleeve 30. Specifically, the range of the fourth scale 33 is 0 to 120mm as well as the first scale 13 and the third scale 23. The insertion depth and the expansion condition of the third stage expansion sleeve 30 can be visually confirmed by the fourth scale 33.

Of course, in other embodiments, the ranges of the scales are not limited thereto.

In this scheme, increase step by step between first order expansion sleeve 10, second level expansion sleeve 20 and the third level expansion sleeve 30, play the effect of expansion and direction, be convenient for use with guide pin and opening awl cooperation to confirm the position of planting the nail and pedicle of vertebral arch screw angle of getting into the way. All be equipped with the scale on first order expansion sleeve 10, second level expansion sleeve 20 and the tertiary expansion sleeve 30, can know the passageway degree of depth and the expansion condition fast, simple structure. The first end 31 of the third stage expansion sleeve 30 is of a sawtooth shape, so that direct periosteum incision and fixation in the cortical bone of the pedicle of vertebral arch are facilitated, a channel is established, and preliminary positioning and subsequent operation of the implanted nail are facilitated. The third stage expansion sleeve 30 is provided with a handrail part 34, which is convenient for fixing the whole channel and simultaneously increases the operation visual field and the operation space. Has the characteristics of accurate positioning, good stability and ideal soft tissue separation.

Further, in this embodiment, two first-stage guide sleeve holes 101 of the first-stage expansion sleeve 10 are provided, the two first-stage guide sleeve holes 101 are parallel, and the two first-stage guide sleeve holes 101 can be selected according to actual clinical requirements, that is, the guide pin is inserted into the appropriate first-stage guide sleeve hole 101 for operation according to actual conditions. Of course, in other embodiments, one may be provided. Alternatively, when the area is sufficiently large, three or more may be provided.

Further, in this embodiment, the first end 11 of the first stage expansion sleeve 10 is tapered, and the tapered structure has a guiding function, so as to facilitate the insertion of the first stage expansion sleeve 10. Likewise, the first end 21 of the second stage expansion sleeve 20 is tapered to facilitate insertion of the second stage expansion sleeve 20. Of course, in other embodiments, this is not limiting.

Further, in this embodiment, two handrail parts 34 of the third stage expanding sleeve 30 are provided, and the two handrail parts 34 are oppositely extended to form a T-shaped structure, as shown in fig. 6. When in operation, the two handrail parts 34 are fixed at the same time, so that the structure is firmer. Of course, in other embodiments, the number and arrangement positions of the armrest portions 34 of the third stage expanding sleeve 30 are not limited thereto.

More specifically, the armrest portion 34 of the third stage expansion sleeve 30 is provided with a connecting through hole 341, and the connecting through hole 341 is convenient for the operating table to establish connection, so that the fixing is more convenient.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A minimally invasive stepwise spine dilator, comprising:

the first-stage expansion sleeve is provided with a first end part used as an insertion end, a second end part opposite to the first end part and a first-stage guide sleeve hole penetrating through the first end part and the second end part, the first-stage guide sleeve hole is used for penetrating a guide pin, a first graduated scale close to the first end part and a second graduated scale close to the second end part are arranged on the first-stage expansion sleeve, and the second graduated scale is used for being matched with the guide pin in a contrasting manner;

the second-stage expansion sleeve is provided with a first end part serving as an insertion end, a second end part opposite to the first end part and a second-stage guide sleeve hole penetrating through the first end part and the second end part, the second-stage expansion sleeve is sleeved on the first-stage expansion sleeve in a guide mode through the second-stage guide sleeve hole, and a third scale is arranged on the second-stage expansion sleeve;

third level expansion sleeve has the first end that inserts the end, the second end relative with the first end and link up the third guide sleeve hole of first end and second end, third level expansion sleeve cup joints on second level expansion sleeve through third guide sleeve hole direction, third level expansion sleeve's first end is sawtooth pattern, third level expansion sleeve's second end has handrail portion along the outside extension of radial direction, be equipped with the fourth scale on the third level expansion sleeve.

2. The minimally invasive spinal cascade dilator of claim 1, wherein: two first-stage guide sleeve holes of the first-stage expansion sleeve are arranged and are parallel to each other.

3. The minimally invasive spinal cascade dilator of claim 1, wherein: the first end of the first stage expansion sleeve is arranged in a conical shape.

4. The minimally invasive spinal cascade dilator of claim 1, wherein: the first end of the second stage expansion sleeve is arranged in a conical shape.

5. The minimally invasive spinal cascade dilator of claim 1, wherein: the third stage expansion sleeve is provided with two handrail parts, and the two handrail parts extend reversely.

6. The minimally invasive spinal incremental dilator of claim 1 or 5, wherein: and the armrest part of the third-stage expansion sleeve is provided with a connecting through hole.