Dilating endocutter assembly

Abstract

The application provides a dilating and internal cutting sleeve assembly, which comprises an inner sleeve and an outer sleeve, the outer side surface of the inner sleeve body is rectangular in cross section, the lower end of the inner sleeve body is provided with a conical head, the outer side surface of the upper end of the inner sleeve body is provided with an inner sleeve handle, and the outer side surface of the inner sleeve body is sleeved with a limiting ring; the inner sleeve is internally provided with a needle guide axial through hole; the outer side surface of the upper end of the outer sleeve body is provided with an outer sleeve handle, and the lower end of the outer sleeve body is provided with an internal cutting head; the inner part of the outer sleeve body is provided with a rectangular outer sleeve axial channel, and the inner part of the internal cutting head is provided with a rectangular internal cutting head axial channel; the size of the cross section of the rectangular internal cutting head axial channel decreases from bottom to top; and the inner sleeve body can be inserted into the rectangular sleeve body channel. The dilating and internal cutting sleeve assembly can realize dilating and internal cutting operations simultaneously, so that the operation is convenient, the steps are simple, a large amount of operation time is saved, and the recovery of the patient is facilitated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a spreading internal incision sleeve assembly. Background Technology

[0002] Most existing sleeves are three-stage sleeves, all with a hollow cone head and a hollow cylinder rear. The inner diameter of the first-stage sleeve is the same as the guide pin, 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 inserting the guide needle, the three-stage sleeve is nested along the guide needle step by step. Then, the guide needle, the first-stage sleeve, and the second-stage sleeve are removed, and a minimally invasive surgical channel is established through the third-stage sleeve. After establishing the surgical channel, a cutting and reaming tool is needed to cut and enlarge the vertebral body.

[0004] Existing surgical sleeves all have circular channels, while the corresponding implants have rectangular projection surfaces, resulting in wasted space. Furthermore, the existing three-stage sleeve operation is cumbersome, requiring additional tools for cutting and enlarging the opening, thus increasing surgical time. Designing a sleeve assembly that can form a rectangular surgical channel without the need for auxiliary cutting tools is a problem that needs to be solved by those skilled in the art. Summary of the Invention

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

[0006] To achieve the above and other related objectives, the present invention provides an openable internal sleeve assembly, comprising:

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

[0008] An outer sleeve includes an outer sleeve body, an inner cut-out head, and an outer sleeve handle; the outer sleeve handle is provided on the outer surface of the upper end of the outer sleeve body, and the inner cut-out head is provided at the lower end of the outer sleeve body; a rectangular outer sleeve axial channel is provided inside the outer sleeve body, and a rectangular inner cut-out head axial channel is provided inside the inner cut-out head; the rectangular outer sleeve axial channel and the rectangular inner cut-out head axial channel are connected to form a rectangular sleeve channel; the cross-sectional dimensions of the rectangular inner cut-out head axial channel decrease sequentially from bottom to top;

[0009] The cross-sectional dimensions of the outer side of the inner cylinder body are the same as the dimensions 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 has a flat plate structure and 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 abuts against the upper surface of the outer cylinder body, the lower end of the conical head protrudes through the lower end of the inner cleaved head.

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

[0015] When using the internal incision sleeve assembly of the present invention, the guide needle is pre-inserted into the bone. The inner sleeve body is inserted into the rectangular tube channel of the outer sleeve. The guide needle is passed through the axial through hole of the guide needle from the lower end. The lower ends of the inner sleeve and the lower ends of the outer sleeve abut against the skin, that is, the lower end face of the inner sleeve and the lower end face of the outer sleeve are flush. At this time, the limiting ring is higher than the top surface of the outer sleeve. Hold the inner sleeve handle and press down hard. After the conical head opens the skin and enters, the rectangular inner sleeve body moves downward together. The limiting ring on the rectangular inner sleeve body contacts the top surface of the outer sleeve. The outer sleeve continues to move downward with the inner sleeve. The limiting ring squeezes the outer sleeve, forcing the outer sleeve to... As the sleeve moves downwards, the inner cutting head in the outer sleeve enters the skin. Once the inner sleeve reaches the predetermined depth, the outer sleeve handle is grasped, and the inner sleeve is pulled out along with the handle. At this point, the rectangular cylindrical channel is the established surgical channel. During the downward movement of the outer sleeve, the lower end of the outer sleeve's inner cutting head completes the reaming and cutting work, allowing the entire process to be completed in one step. The internal cutting sleeve assembly of this invention can simultaneously perform opening and internal cutting operations, making the surgery convenient, the steps simple, saving a significant amount of surgical time, and benefiting the patient's recovery. The internal cutting sleeve assembly can form a rectangular surgical channel without the need for auxiliary cutting tools. Attached Figure Description

[0016] Figure 1 The diagram shows the structure of the inner sleeve of the expandable inner sleeve assembly in this embodiment, with the inner sleeve inserted into the outer sleeve and the conical head of the inner sleeve not protruding from the bottom of the outer sleeve.

[0017] Figure 2 This diagram shows the structure of the inner sleeve of the expanding inner sleeve assembly in this embodiment, inserted into the outer sleeve, with the limiting ring of the inner sleeve pressing against the top surface of the outer sleeve.

[0018] Figure 3 The diagram shown is a structural schematic of the inner sleeve of the expandable inner sleeve assembly in this embodiment.

[0019] Figure 4 The diagram shown is a structural schematic of the outer sleeve of the inner sleeve assembly in this embodiment.

[0020] Figure 5 The diagram shown is a structural schematic of the inner cut head of the outer sleeve of the inner cut sleeve assembly in this embodiment.

[0021] Figure 6 The diagram shown is a side view of the outer sleeve of the inner sleeve assembly in this embodiment.

[0022] Figure 7 Displayed as Figure 6 A schematic diagram of the AA-direction cross-section structure.

[0023] Explanation of icon numbers

[0024] 100 Inner Sleeve

[0025] 110 Inner cylinder body

[0026] 120 Conical Head

[0027] 130 Inner Grip

[0028] 140 Limiting Ring

[0029] 150 Guide pin axial through hole

[0030] 200 coat sleeve

[0031] 210 outer cylinder body

[0032] 211 Rectangular outer cylinder axial channel

[0033] 220 internal head incision

[0034] 221 Rectangular incision head axial channel

[0035] 230 outer grip

[0036] 240 Rectangular cylindrical channel Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0038] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0039] like Figures 1 to 7 As shown, the expandable inner 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 limiting 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 fitted with a limiting ring 140; the inner sleeve 100 has an axial through hole 150 for a guide needle inside.

[0041] The outer sleeve 200 includes an outer sleeve body 210, an inner cut-out head 220, and an outer sleeve handle 230. The outer sleeve handle 230 is provided on the outer side of the upper end of the outer sleeve body 210, and the inner cut-out 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-out head axial channel 221 is provided inside the inner cut-out head 220. The rectangular outer sleeve axial channel 211 and the rectangular inner cut-out head axial channel 221 are connected to form a rectangular sleeve channel 240. The cross-sectional dimensions of the rectangular inner cut-out head axial channel 221 decrease from bottom to top.

[0042] The cross-sectional dimensions of the outer side of the inner cylinder body 110 are the same as the dimensions of the rectangular outer cylinder axial channel 211, and the inner cylinder body 110 can be inserted into the rectangular cylinder channel 240.

[0043] When using the internal incision sleeve assembly of the present invention, the guide needle is pre-inserted into the bone. The inner sleeve body 110 is inserted into the rectangular cylindrical channel 240 of the outer sleeve 200. The guide needle is passed through the guide needle axial through hole 150 from the lower end. The lower ends of the inner sleeve 100 and the outer sleeve 200 abut against the skin, that is, the lower end face of the inner sleeve 100 and the lower end face 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 sleeve handle 130 and presses down hard. After the conical head 120 opens the skin and enters, the rectangular inner sleeve body 110 moves downward together. Then, the limiting ring 140 on the rectangular inner sleeve body 110 contacts the top surface of the outer sleeve 200. The outer sleeve 200 continues to move downward with the inner sleeve 100. 140 Squeezes the outer sleeve 200, forcing it to move downwards. The inner cutting head 220 in the outer sleeve 200 enters the skin. After the inner sleeve 100 reaches the predetermined depth, the outer sleeve handle 230 is grasped, and the inner sleeve handle 130 is pulled out along with the entire inner sleeve 100. At this time, the rectangular cylindrical channel 240 is the established surgical channel. During the downward movement of the outer sleeve 200, the inner cutting head 220 at the lower end of the outer sleeve 200 completes the reaming and cutting work, so that the reaming and cutting steps are completed in one go. The inner cutting sleeve assembly of the present invention can realize the reaming and cutting operations at the same time, making the operation convenient, the steps simple, saving a lot of surgical time, and benefiting the patient's recovery. The inner cutting sleeve assembly can form a rectangular surgical channel without the need for auxiliary cutting tools.

[0044] In this embodiment, when the inner cylinder 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 cylinder body 110 are the same as the dimensions of the rectangular outer cylinder axial channel 211, and the inner cylinder body 110 and the rectangular outer cylinder axial channel 211 are in clearance fit. The central axis of the guide needle axial through hole 150 is collinear with the central axis of the inner cylinder body 110, which facilitates the determination of the position of the surgical channel. The guide needle axial through hole 150 penetrates the entire inner sleeve 100. The limiting ring 140 is located in the upper middle part of the inner sleeve 100; the conical head 120 is a cone and is located at the lower end of the rectangular inner cylinder body 110.

[0045] The outer circumferential surface of the limiting ring 140 is circular, and the outer circumferential surface of the outer cylinder body 210 is also circular. The size of the outer circumferential surface of the limiting ring 140 is larger than the size of the outer circumferential surface of the outer cylinder body 210. This structure allows the limiting ring 140 to stably press against the top of the outer sleeve 200.

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

[0047] The inner cylinder handle 130 has a flat plate structure and is perpendicular to the central axis of the inner cylinder body 110. The flat plate structure of the inner cylinder handle 130 is compact and facilitates gripping by medical personnel. Both the top and bottom surfaces of the inner cylinder handle 130 are flat to facilitate its machining.

[0048] The outer cylinder grip 230 has a flat plate structure and is perpendicular to the central axis of the outer cylinder body 210. The inner cylinder grip 130 has a flat plate structure, which is compact and easy for medical personnel to grip. The top and bottom surfaces of the outer cylinder grip 230 are both flat to facilitate the machining of the inner cylinder grip 130.

[0049] When the inner cylinder body 110 is inserted into the rectangular cylinder channel 240 and the limiting ring 140 abuts against the upper surface of the outer cylinder body 210, the lower end of the conical head 120 protrudes through the lower end of the incision head 220. This structure facilitates the simultaneous opening and incision operations of the incision sleeve assembly.

[0050] The internal incision sleeve assembly of the present invention solves the problem that the procedure of using a sleeve during surgery is too cumbersome for doctors, which leads to longer operation time.

[0051] The present invention provides an internal incision sleeve assembly. The movement of the inner sleeve 100 drives the movement of the outer sleeve 200, thus establishing a surgical channel in one operation. Furthermore, the internal incision head 220 at the lower end of the outer sleeve 200 cuts into the vertebral body, simultaneously completing the cutting and reaming work.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can 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 those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A spreading inner tangential sleeve assembly, characterized in that, include: The inner sleeve (100) includes an inner sleeve body (110), a conical head (120), an inner sleeve handle (130), and a limiting 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 the conical head (120), the outer side of the upper end of the inner sleeve body (110) is provided with the inner sleeve handle (130), and the limiting ring (140) is sleeved on the outer side of the inner sleeve body (110); the inner sleeve (100) has an axial through hole (150) for the guide needle inside. An outer sleeve (200) includes 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 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) and the rectangular inner cut head axial channel (221) are connected to form a rectangular sleeve channel (240); the cross-sectional dimensions of the rectangular inner cut head axial channel (221) decrease sequentially from bottom to top; The cross-sectional dimensions of the outer side of the inner cylinder body (110) are the same as those of the rectangular outer cylinder axial channel (211). The inner cylinder body (110) can be inserted into the rectangular cylinder channel (240). When the lower end face of the inner sleeve (100) is flush with the lower end face of the outer sleeve (200), the limiting ring (140) is higher than the top surface of the outer sleeve (200). When the inner cylinder body (110) is inserted into the rectangular cylinder channel (240) and the limiting ring (140) abuts against the upper surface of the outer cylinder body (210), the lower end of the conical head (120) protrudes from the lower end of the incisional head (220).

2. The expandable inner sleeve assembly according to claim 1, characterized in that: The outer circumferential surface of the limiting ring (140) is circular, the outer circumferential surface of the outer cylinder body (210) is circular, and the size of the outer circumferential surface of the limiting ring (140) is larger than the size of the outer circumferential surface of the outer cylinder body (210).

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

4. The expandable inner sleeve assembly according to claim 1, characterized in that: The outer barrel grip (230) has a flat plate structure and is perpendicular to the central axis of the outer barrel body (210).

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