Opening inscribed sleeve assembly

Abstract

The invention provides an opening internally-tangent sleeve assembly which comprises an inner sleeve and an outer sleeve, and the cross section of the outer side face of an inner sleeve body of the inner sleeve is rectangular; a conical head is arranged at the lower end of the inner barrel body, an inner barrel grip is arranged on the outer side face of the upper end of the inner barrel body, and the outer side face of the inner barrel body is sleeved with a limiting ring. A guide pin axial through hole is formed in the inner sleeve; an outer sleeve grip is arranged on the outer side surface of the upper end of an outer sleeve body of the outer sleeve, and an internally tangent head part is arranged at the lower end of the outer sleeve body; a rectangular outer cylinder axial channel is arranged in the outer cylinder body, and a rectangular inner cutting head axial channel is arranged in the inner cutting head part; the size of the cross section of the axial channel of the rectangular inner cutting head is sequentially reduced from bottom to top; and the inner cylinder body can be inserted into the rectangular cylinder body channel. According to the distraction and internally-cutting sleeve assembly, distraction and internally-cutting operation can be achieved at the same time, the operation is convenient, the steps are simple, a large amount of operation time is saved, and recovery of a patient is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a distraction-incision sleeve assembly. Background Art

[0002] Most existing sleeves are three-stage sleeves, all of which are shaped like a hollow cone at the head and a hollow cylinder at the back. The inner diameter of the first-stage sleeve is the same as the guide needle, the inner diameter of the second-stage sleeve is the same as the outer diameter of the first-stage sleeve, and the inner diameter of the third-stage sleeve is the same as the outer diameter of the second-stage sleeve.

[0003] After the guide needle is inserted, the three-stage sleeve is nested step by step along the guide needle. The guide needle, first-stage sleeve, and second-stage sleeve are then removed, and a minimally invasive surgical channel is established through the third-stage sleeve. After the surgical channel is established, a cutting and reaming tool is required to cut and expand the vertebral body.

[0004] Existing sleeves have circular channels, while the corresponding implants have rectangular projections, resulting in wasted space. Furthermore, existing three-stage sleeves are cumbersome to operate and require additional tools for cutting and enlarging, increasing surgical time. Designing a sleeve assembly that can create a rectangular surgical channel without requiring additional cutting tools is a challenge facing those skilled in the art. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem solved by the present invention is to provide a distraction-endocutting sleeve assembly that can form a rectangular surgical channel without the need for auxiliary cutting tools.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a spreading and internally inscribed sleeve assembly, comprising:

[0007] The inner sleeve comprises an inner sleeve body, a conical head, an inner sleeve handle, and a limiting ring; the cross-section of the outer side of the inner sleeve body is rectangular; the conical head is provided at the lower end of the inner sleeve body, the inner sleeve handle is provided on the outer side of the upper end of the inner sleeve body, and the limiting ring is sleeved on the outer side of the inner sleeve body; the inner sleeve is provided with an axial through hole for the guide needle;

[0008] The outer sleeve comprises an outer sleeve body, an inner cut head and an outer sleeve handle; the outer sleeve handle is provided on the outer side surface of the upper end of the outer sleeve body, and the inner cut head is provided at the lower end of the outer sleeve body; a rectangular outer sleeve axial passage is provided inside the outer sleeve body, and a rectangular inner cut head axial passage is provided inside the inner cut head; the rectangular outer sleeve axial passage is connected to the rectangular inner cut head axial passage to form a rectangular sleeve passage; the cross-sectional dimensions of the rectangular inner cut head axial passage decrease from bottom to top;

[0009] The size of the cross section of the outer side surface of the inner cylinder body is the same as the size of the axial channel of the rectangular outer cylinder, and the inner cylinder body can be inserted into the rectangular cylinder channel.

[0010] Preferably, the outer circumferential surface of the limiting ring is circular, the outer circumferential surface of the outer cylinder body is circular, and the size of the outer circumferential surface of the limiting ring is larger than the size of the outer circumferential surface of the outer cylinder body.

[0011] Preferably, the inner cylinder handle is a flat plate structure, and the inner cylinder handle is perpendicular to the central axis of the inner cylinder body.

[0012] Preferably, the outer cylinder handle is a flat plate structure, and the outer cylinder handle is perpendicular to the central axis of the outer cylinder body.

[0013] Preferably, when the inner cylinder body is inserted into the rectangular cylinder channel and the limiting ring presses against the upper surface of the outer cylinder body, the lower end of the conical head passes through the lower end of the inscribed head.

[0014] As described above, the expansion sleeve assembly of the present invention has the following beneficial effects:

[0015] When the expanded endocut sleeve assembly of the present invention is used, the guide needle piece has been pre-placed in the bone, the inner cylinder body is inserted into the rectangular cylinder channel of the outer sleeve, and the guide needle piece is passed through the guide needle axial through hole from the lower end of the guide needle axial through hole, and the lower end of the inner sleeve and the lower end of the outer sleeve are against the skin, that is, the lower end surface of the inner sleeve and the lower end surface of the outer sleeve are flush, and at this time the limiting ring is higher than the top surface of the outer sleeve; the inner cylinder handle is held by hand and pressed down hard, and after the conical head expands the skin and enters, the rectangular inner cylinder body moves downward together, and the limiting ring on the rectangular inner cylinder body contacts the top surface of the outer sleeve, and the outer sleeve continues to move downward with the inner sleeve, and the limiting ring squeezes the outer sleeve, forcing the outer sleeve to The sleeve moves downward, and the endocut head in the outer sleeve enters the skin together. After the inner sleeve reaches a predetermined depth, the outer sleeve handle is held, and the inner sleeve handle is pulled out together with the entire inner sleeve. At this time, the rectangular cylindrical channel is the established surgical channel; in the process of the outer sleeve moving downward, the endocut head at the lower end of the outer sleeve completes the hole expansion and cutting work, so that the entire step is completed at one time; the expansion and endocut sleeve assembly of the present invention can simultaneously realize expansion and endocut operations, making the operation convenient, the steps simple, saving a lot of operation time, and being beneficial to the patient's recovery. The expansion and endocut sleeve assembly can form a rectangular surgical channel without the need to set up auxiliary cutting tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram showing the inner sleeve of the expanded inscribed sleeve assembly of this embodiment when the inner sleeve is inserted into the outer sleeve and the conical head of the inner sleeve does not extend out of the bottom of the outer sleeve.

[0017] Figure 2 It is a schematic structural diagram showing the inner sleeve of the expanded inscribed sleeve assembly of this embodiment being inserted into the outer sleeve, and the limiting ring of the inner sleeve squeezing the top surface of the outer sleeve.

[0018] Figure 3 Shown is a schematic structural diagram of the inner sleeve of the expanded inscribed sleeve assembly of this embodiment.

[0019] Figure 4 Shown is a schematic structural diagram of the outer sleeve of the expanded inscribed sleeve assembly of this embodiment.

[0020] Figure 5 Shown is a schematic structural diagram of the inscribed head portion of the outer sleeve of the expanded inscribed sleeve assembly of this embodiment.

[0021] Figure 6 Shown is a side structural schematic diagram of the outer sleeve of the expanded inscribed sleeve assembly of this embodiment.

[0022] Figure 7 Display as Figure 6 AA section structure diagram.

[0023] Explanation of Figure Numbers

[0024] 100 inner sleeve

[0025] 110 Inner cylinder body

[0026] 120 Conical head

[0027] 130 Inner barrel grip

[0028] 140 limit ring

[0029] 150 Guide pin axial through hole

[0030] 200 outer sleeve

[0031] 210 outer cylinder body

[0032] 211 Rectangular outer cylinder axial channel

[0033] 220 Incision Head

[0034] 221 Rectangular inscribed head axial channel

[0035] 230 outer barrel grip

[0036] 240 rectangular cylindrical channel DETAILED DESCRIPTION

[0037] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0038] Please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0039] like Figures 1 to 7 As shown, the expansion and internal cutting sleeve assembly of this embodiment includes:

[0040] The inner sleeve 100 includes an inner sleeve body 110, a conical head 120, an inner sleeve handle 130, and a retaining ring 140. The outer side of the inner sleeve body 110 has a rectangular cross-section. The lower end of the inner sleeve body 110 is provided with a conical head 120, the outer side of the upper end of the inner sleeve body 110 is provided with an inner sleeve handle 130, and the outer side of the inner sleeve body 110 is sleeved with a retaining ring 140. The inner sleeve 100 has an axial through hole 150 for the guide needle.

[0041] The outer sleeve 200 includes an outer sleeve body 210, an inner cut head 220, and an outer sleeve handle 230. The outer sleeve body 210 has an outer sleeve handle 230 on its upper outer side, and the inner cut head 220 on its lower end. The outer sleeve body 210 has a rectangular outer sleeve axial passage 211 formed therein, and the inner cut head 220 has a rectangular inner cut head axial passage 221 formed therein. The rectangular outer sleeve axial passage 211 communicates with the rectangular inner cut head axial passage 221 to form a rectangular sleeve passage 240. The cross-sectional dimensions of the rectangular inner cut head axial passage 221 decrease from bottom to top.

[0042] The size of the cross section of the outer side surface of the inner cylinder body 110 is the same as the size of the rectangular outer cylinder axial passage 211 , and the inner cylinder body 110 can be inserted into the rectangular cylinder passage 240 .

[0043] When the expansion endocut sleeve assembly of the present invention is used, the guide needle piece has been pre-placed in the bone, the inner cylinder body 110 is inserted into the rectangular cylinder channel 240 of the outer sleeve 200, and the guide needle piece is passed through the guide needle axial through hole 150 from the lower end of the guide needle axial through hole 150. The lower end of the inner sleeve 100 and the lower end of the outer sleeve 200 are against the skin, that is, the lower end surface of the inner sleeve 100 and the lower end surface of the outer sleeve 200 are flush. At this time, the limiting ring 140 is higher than the top surface of the outer sleeve 200; the medical staff holds the inner cylinder handle 130 with their hands and presses down hard. After the conical head 120 expands the skin and enters, the rectangular inner cylinder body 110 moves downward together. Subsequently, the limiting ring 140 on the rectangular inner cylinder body 110 contacts the top surface of the outer sleeve 200, and the outer sleeve 200 continues to move downward with the inner sleeve 100. 140 squeezes the outer sleeve 200, forcing the outer sleeve 200 to move downward, and the endocut head 220 in the outer sleeve 200 enters the skin together. After the inner sleeve 100 reaches the predetermined depth, hold the outer sleeve handle 230, pull out the inner sleeve handle 130 and the entire inner sleeve 100 together. At this time, the rectangular cylindrical channel 240 is the established surgical channel; in the process of the outer sleeve 200 moving downward, the endocut head 220 at the lower end of the outer sleeve 200 completes the reaming and cutting work, so that the entire reaming and cutting steps are completed at one time; the expansion and endocut sleeve assembly of the present invention can simultaneously realize expansion and endocut operations, making the operation convenient, the steps simple, saving a lot of operation time, and being beneficial to the patient's recovery. The expansion and endocut sleeve assembly can form a rectangular surgical channel without the need to set up auxiliary cutting tools.

[0044] In this embodiment, when the inner sleeve body 110 is inserted into the rectangular cylindrical channel 240 of the outer sleeve 200, the cross-sectional dimensions of the outer side of the inner sleeve body 110 are identical to those of the rectangular outer cylindrical axial channel 211, resulting in a clearance fit between the inner sleeve body 110 and the rectangular outer cylindrical axial channel 211. The central axis of the guide needle axial through hole 150 is collinear with the central axis of the inner sleeve body 110, facilitating the positioning of the surgical channel. The guide needle axial through hole 150 extends throughout the entire inner sleeve 100. The retaining ring 140 is located in the upper middle portion of the inner sleeve 100; the conical head 120 is a cone and is located at the lower end of the rectangular inner sleeve body 110.

[0045] The outer circumference of the limiting ring 140 is circular, and the outer circumference of the outer cylinder body 210 is also circular. The outer circumference of the limiting ring 140 is larger than that of the outer cylinder body 210. This structure enables the limiting ring 140 to stably support the top of the outer sleeve 200.

[0046] In this embodiment, the rectangular cylindrical passage 240 is located in the center of the outer sleeve 200 and passes through the entire outer sleeve. The cross-sectional dimensions of the rectangular inner cutting head axial passage 221 decrease from bottom to top, so that the inner circumference of the rectangular inner cutting head 220 forms a circumferentially chamfered inner cutting edge.

[0047] The inner tube handle 130 is a flat plate, perpendicular to the central axis of the inner tube body 110. This flat plate structure is compact and convenient for medical personnel to grasp. Both the top and bottom surfaces of the inner tube handle 130 are flat, facilitating its processing.

[0048] The outer handle 230 is a flat plate, perpendicular to the central axis of the outer body 210. The inner handle 130 is a flat plate, compact and easy for medical personnel to grasp. Both the top and bottom surfaces of the outer handle 230 are flat, facilitating machining of the inner handle 130.

[0049] When the inner cylinder body 110 is inserted into the rectangular cylinder channel 240 and the retaining ring 140 presses against the upper surface of the outer cylinder body 210, the lower end of the conical head 120 passes through the lower end of the inscribed head 220. This structure can facilitate the expansion and inscribed sleeve assembly to achieve the expansion and inscription operations at the same time.

[0050] The expansion endo-incision sleeve assembly of the present invention solves the problem that the steps for doctors to use the sleeve during surgery are too complicated, thereby causing the surgery time to be prolonged.

[0051] The expansion endo-cutting sleeve assembly of the present invention drives the movement of the outer sleeve 200 through the movement of the inner sleeve 100, completes the establishment of the surgical channel in one operation, and the endo-cutting head 220 at the lower end of the outer sleeve 200 cuts into the vertebral body and completes the cutting and expanding work at the same time.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A support sleeve assembly, characterized in that: include: The inner sleeve (100) comprises an inner sleeve body (110), a conical head (120), an inner sleeve handle (130) and a limiting ring (140); the cross section of the outer side of the inner sleeve body (110) is rectangular; the lower end of the inner sleeve body (110) is provided with the conical head (120), the outer side surface of the upper end of the inner sleeve body (110) is provided with the inner sleeve handle (130), and the outer side surface of the inner sleeve body (110) is sleeved with the limiting ring (140); the interior of the inner sleeve (100) is provided with an axial through hole (150) for a guide needle; The outer sleeve (200) comprises an outer sleeve body (210), an inner cut head (220) and an outer sleeve handle (230); the outer sleeve handle (230) is provided on the outer side surface of the upper end of the outer sleeve body (210), and the inner cut head (220) is provided at the lower end of the outer sleeve body (210); a rectangular outer sleeve axial channel (211) is provided inside the outer sleeve body (210), and a rectangular inner cut head axial channel (221) is provided inside the inner cut head (220); the rectangular outer sleeve axial channel (211) is communicated with the rectangular inner cut head axial channel (221) to form a rectangular sleeve channel (240); the cross-sectional dimensions of the rectangular inner cut head axial channel (221) decrease from bottom to top; The size of the cross section of the outer side surface of the inner cylinder body (110) is the same as the size of the rectangular outer cylinder axial channel (211), and the inner cylinder body (110) can be inserted into the rectangular cylinder channel (240).

2. The expansion and internal cutting sleeve assembly according to claim 1, characterized in that: The outer circumference of the limiting ring (140) is circular, the outer circumference of the outer cylinder body (210) is also circular, and the size of the outer circumference of the limiting ring (140) is larger than the size of the outer circumference of the outer cylinder body (210).

3. The expansion and internal cutting sleeve assembly according to claim 1, characterized in that: The inner cylinder handle (130) is a flat plate structure, and the inner cylinder handle (130) is perpendicular to the central axis of the inner cylinder body (110).

4. The expansion and internal cutting sleeve assembly according to claim 1, characterized in that: The outer cylinder handle (230) is a flat plate structure, and the outer cylinder handle (230) is perpendicular to the central axis of the outer cylinder body (210).

5. The expansion and internal cutting sleeve assembly according to claim 1, characterized in that: When the inner cylinder body (110) is inserted into the rectangular cylinder channel (240) and the limiting ring (140) presses against the upper surface of the outer cylinder body (210), the lower end of the conical head (120) passes through the lower end of the inscribed head (220).

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