A semi-tubular surgical access device

Abstract

This utility model relates to the field of medical device technology, specifically disclosing a semi-tubular surgical channel device, comprising: a semi-tubular main body made by cutting a standard 2ml medical syringe in half, the semi-tubular main body retaining the original syringe scale surface, the front end of the semi-tubular main body having a slanted opening, multiple anti-dislodgement ridges symmetrically arranged on the cut surface of the semi-tubular main body, the end of the semi-tubular main body retaining the original syringe wing, and a clamping component movably disposed on the wing; this utility model replaces the spinal endoscope channel protector with a 2ml syringe, establishing a channel and protection function based on its tubular structure, mainly for patients with lumbar disc herniation, applicable to primary hospitals and medical institutions with limited resources. This device has advantages such as low cost, easy access, simple operation and wide applicability, and is particularly suitable for promotion in resource-limited medical environments, providing a new tool option for spinal endoscopic surgery.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a semi-tube surgical channel device. Background Technology

[0002] Endoscopic discectomy is a minimally invasive surgical technique for treating lumbar disc herniation. Its core principle is the removal of the herniated nucleus pulposus tissue under visual guidance through an endoscopic channel, offering advantages such as minimal trauma and rapid recovery. This surgery relies on specialized instruments to establish a stable surgical channel and protect surrounding nerves and soft tissues. The unscrew retractor (UBE half-cannula) is an indispensable key instrument in traditional surgery, its functions including guiding the endoscope and surgical instruments into the target area and isolating the operative area to reduce tissue damage.

[0003] However, traditional UBE retractors, made of titanium alloy, have significant drawbacks: First, the high cost of titanium alloy and its precision machining make them difficult to widely adopt in primary hospitals; second, friction with high-speed instruments like drills during surgery easily generates metal fragments, increasing the risk of foreign body residue; third, the instruments require repeated sterilization, which is time-consuming and severely impacts surgical efficiency. Statistical surveys show that in 2024, a certain medical institution performed over 500 UBE surgeries, with a peak of 7 per day, a utilization rate of 175%, while the corresponding number of UBE retractors was very limited. Since the retractor is an indispensable surgical instrument, it needs to be sterilized promptly after use, but the lengthy sterilization process significantly affects surgical efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a semi-tube surgical channel device, which facilitates the use of a low-cost and efficient semi-tube retractor for spinal endoscopic discectomy.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A semi-tubular surgical access device, comprising:

[0007] The semi-tubular body is made by cutting a standard 2ml medical syringe in half. The semi-tubular body retains the original syringe scale surface. The front end of the semi-tubular body is provided with a beveled opening. Multiple anti-dislodgement ridges are symmetrically provided on the cut surface of the semi-tubular body. The end of the semi-tubular body retains the original syringe wing. A clamping component is movably provided on the wing.

[0008] Preferably, the oblique cut extends from the edge of the 0.5ml graduation line at the front end to the edge of the 0.1ml graduation line, forming an oblique surface of 30°-45° for puncture guidance.

[0009] Preferably, multiple anti-dislodgement ridges are respectively set at the 1ml, 2ml, and 2.5ml scales of the semi-tubular body. The anti-dislodgement ridges are composed of vertical incisions and oblique incisions, forming a right-angled triangular notch structure for fixing the position of the device during surgery.

[0010] Preferably, the semi-tubular body is made of medical-grade polypropylene material, and the graduation accuracy of the scale surface is ±0.1ml, which is used for precise positioning of the operation depth during surgery.

[0011] Preferably, the clamping assembly includes clamping plates symmetrically arranged on the top and bottom surfaces of the syringe fins. The shape of the clamping plates fits the semi-tubular body, wherein an extension tube is fixedly arranged on the bottom surface of the clamping plate at the lower end, and the extension tube is semi-tubular in shape.

[0012] Preferably, both sides of the two clamping plates are provided with through mounting holes, and bolts are inserted into the mounting holes. The bolts pass through the two mounting holes and are threaded with a rotating cap at the top.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By modifying the standard 2ml syringe into a semi-tubular body and replacing the traditional titanium alloy material with medical-grade polypropylene, the cost per unit is reduced to 1 / 10 of that of traditional instruments, significantly alleviating the economic burden on primary hospitals. The single-use design completely eliminates the need for sterilization, solving the instrument shortage problem caused by repeated sterilization of traditional semi-cannula retractors, and greatly improving surgical efficiency. The polypropylene material completely eliminates the risk of metal debris residue generated by friction between titanium alloy and drills, reducing the probability of postoperative infection and foreign body reaction. The device achieves precise positioning of the intraoperative operating depth by retaining the original scale surface of the syringe (±0.1ml accuracy), and combined with the self-locking fixation design of the anti-dislodgement edge on the cutting surface, it reduces the frequency of intraoperative adjustments. The ease of operation is significantly better than that of traditional instruments. Moreover, the 2ml syringe is a basic medical consumable widely deployed in institutions at all levels. Its modification process only requires cutting, oblique cutting, and processing of the anti-dislodgement edge, without the need for complex equipment or technical barriers, ensuring rapid mass production and clinical promotion. It is especially suitable for the minimally invasive surgical needs of lumbar disc herniation in resource-limited environments. Attached Figure Description

[0015] Figure 1 This is a front perspective view of the present invention;

[0016] Figure 2 This is a rear-view perspective view of the present invention;

[0017] Figure 3 This is a schematic diagram showing the structural connection between the semi-tubular main body and the clamping assembly of this utility model;

[0018] Figure 4This is a structural disassembly diagram of the clamping assembly of this utility model;

[0019] In the diagram: 1. Semi-tubular main body; 2. Oblique cut opening; 3. Anti-detachment ridge; 4. Wing; 5. Clamping plate; 6. Extension tube; 7. Bolt; 8. Rotating cap. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] Example 1:

[0023] Please see Figures 1-4 As shown, a semi-tubular surgical access device includes:

[0024] The semi-tubular body 1 is made by cutting a standard 2ml medical syringe in half. The semi-tubular body 1 retains the original syringe scale surface. The front end of the semi-tubular body 1 is provided with a slanted opening 2. Multiple anti-dislodgement ridges 3 are symmetrically provided on the cut surface of the semi-tubular body 1. The end of the semi-tubular body 1 retains the original syringe wing 4. A clamping component is movably provided on the wing 4.

[0025] Depend on Figures 1-2It can be seen that the oblique incision 2 extends from the 0.5ml scale line at the front end to the edge of the 0.1ml scale line, forming an oblique surface of 30°-45°. The starting point and ending point of the oblique incision 2 are located by the original scale line of the syringe, ensuring the consistency of the length and angle of the oblique surface, realizing standardized cutting, avoiding manual operation errors, ensuring the accuracy and repeatability of the device, and being used for puncture guidance. The oblique surface design guides the puncture needle or endoscope to enter the target area along the predetermined path, reducing repeated adjustments during the operation and shortening the operation time.

[0026] Multiple anti-dislodgement notches 3 are respectively set at the 1ml, 2ml, and 2.5ml scales on the semi-tubular main body 1. These scale positions are based on the original volume markings of the syringe and correspond to the common operating depth range in spinal endoscopic surgery (such as the herniated disc site, which is usually located at a certain depth from the skin surface). Through standardized settings, it is ensured that the anti-dislodgement notches 3 cover the fixation points required during the operation, preventing the device from sliding due to tissue pressure or instrument operation. The anti-dislodgement notches 3 consist of a vertical incision and an oblique incision, forming a right-angled triangular notch structure. The geometric characteristics of the triangle create a "barb" effect on the edge of the incision, which produces a self-locking effect when embedded in the surrounding soft tissue, significantly improving fixation stability and fixing the device position during the operation. When the semi-tubular main body is inserted into the tissue, the sharp edge of the anti-dislodgement notch 3 (polished) forms a mechanical engagement with the surrounding soft tissue, preventing the device from shifting due to the flow of irrigation fluid or instrument operation during the operation. During the operation, the surgeon can quickly identify the position of the anti-dislodgement notch through the scale lines and adjust the insertion depth to ensure that the surgical channel is accurately aligned with the target area.

[0027] The semi-tubular main body 1 is made of medical-grade polypropylene. Medical-grade polypropylene is a material that has passed rigorous biosafety testing and can avoid human immune reactions or tissue inflammation. It is particularly suitable for medical devices that come into long-term contact with internal tissues. Compared with traditional titanium alloy materials, the raw material cost and processing cost of polypropylene are significantly reduced, which meets the promotion needs of primary hospitals and resource-limited scenarios. The scale accuracy is ±0.1ml, which is used to accurately locate the operation depth during surgery. In spinal endoscopic surgery, the operation depth directly affects the thoroughness of nucleus pulposus resection and the effect of nerve protection. The scale accuracy of ±0.1ml (corresponding to a physical length of about 1mm) allows doctors to accurately judge the insertion depth of the instrument and reduce the risk of accidental injury to nerve roots or dura mater.

[0028] As can be seen from the above, establishing a surgical channel is one of the key steps in endoscopic discectomy. Traditional surgery uses a semi-cannula retractor to establish the channel and protect surrounding tissues (such as nerve roots and dura mater). This device, with its oblique incision 2 (30°-45° bevel) at the front end, is designed based on the original graduations of a syringe (0.5ml to 0.1ml). During the operation, under fluoroscopic guidance, the bevel can precisely separate tissue spaces, quickly establishing a surgical channel and reducing mechanical damage to nerve roots and dura mater. After the semi-tubular body 1, made of medical-grade polypropylene, is inserted into the target area, its wall isolates the surrounding soft tissue, providing a stable operating space for the endoscope and surgical instruments (such as nucleus pulposus forceps and radiofrequency electrodes). To avoid accidental injury during surgery, the triangular notch anti-dislodgement ridges 3 (at the 1ml, 2ml, and 2.5ml markings) on the incision surface embed into the surrounding soft tissue. Through the mechanical engagement of the vertical and oblique incisions, a self-locking effect is formed, preventing the device from shifting due to the flow of irrigation fluid or instrument operation. This reduces the frequency of intraoperative adjustments and preserves the original markings of the syringe (±0.1ml accuracy). During surgery, the surgeon can directly judge the instrument insertion depth through the markings (1ml corresponds to approximately 1cm), reducing reliance on imaging equipment for repeated confirmation of position and shortening the operation time by approximately 20%. The disposable design made of polypropylene directly replaces traditional titanium alloy instruments, avoiding the problem of insufficient instrument turnover caused by time-consuming sterilization, and significantly improving surgical efficiency.

[0029] This invention replaces the spinal endoscope channel protector with a 2ml syringe, establishing a channel and protection function based on its tubular structure. It is mainly used for patients with lumbar disc herniation and is applicable to primary hospitals and medical institutions with limited resources. This device has the advantages of low cost, easy access, simple operation and wide applicability. It is particularly suitable for promotion in medical environments with limited resources, providing a new tool option for spinal endoscopic surgery.

[0030] Example 2:

[0031] refer to Figure 3 and Figure 4 As shown, the clamping assembly includes clamping pieces 5 symmetrically arranged on the top and bottom surfaces of the syringe wing 4. The shape of the clamping pieces 5 fits the semi-tubular body 1. An extension tube 6 is fixedly arranged on the bottom surface of the clamping piece 5 at the lower end. The extension tube 6 is semi-tubular in shape.

[0032] Both sides of the two clamping plates 5 are provided with through mounting holes, and bolts 7 are inserted into the mounting holes. The bolts 7 pass through the two mounting holes and are threaded with rotating caps 8 at the top.

[0033] As shown above, the clamping plates 5 are symmetrically arranged on the top and bottom surfaces of the syringe fins 4. The shape of the clamping plates 5 matches the outer contour of the semi-tubular body 1, ensuring a tight fit during clamping. The semi-tubular extension tube 6 is fixedly connected to the bottom surface of the clamping plate 5 at the lower end. Its inner diameter is consistent with the outer diameter of the semi-tubular body 1, forming a continuous channel to extend the operating length. The clamping plates 5 have through mounting holes on both sides, through which the two clamping plates are inserted by inserting bolts 7, and a rotating cap 8 is threaded to the top. During the operation, the semi-tubular body 1 is inserted into the extension tube 6, and the rotating cap 8 is tightened to lock the clamping plates 5, forming a stable extended surgical channel.

[0034] The clamping component extends the operating length of the entire device to 10-15cm, making it suitable for deep intervertebral disc resection and avoiding the limited field of vision caused by the original syringe being too short. While improving the ease of operation, this component still maintains the advantage of low cost (the extension tube and clamping plate are made of medical ABS injection molding, increasing the cost per unit by less than 2 yuan). It is especially suitable for complex or deep spinal minimally invasive surgery, further expanding the clinical application scope of the device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-tubular surgical access device, characterized in that, include: A semi-tubular body (1) is made by cutting a standard 2ml medical syringe in half. The semi-tubular body (1) retains the original syringe scale surface. The front end of the semi-tubular body (1) is provided with a slanted opening (2). Multiple anti-dislodgement ridges (3) are symmetrically provided on the cut surface of the semi-tubular body (1). The end of the semi-tubular body (1) retains the original syringe wing (4). A clamping component is movably provided on the wing (4).

2. A semi-tubular surgical access device according to claim 1, wherein: The oblique opening (2) extends from the 0.5ml scale line at the front end to the edge of the 0.1ml scale line, forming an oblique surface of 30°-45° for puncture guidance.

3. A semi-tubular surgical access device according to claim 1, wherein: Multiple anti-dislodgement notches (3) are respectively set at the 1ml, 2ml and 2.5ml scales of the semi-tubular body (1). The anti-dislodgement notches (3) are composed of vertical incisions and oblique incisions, forming a right-angled triangular notch structure, which is used to fix the position of the device during surgery.

4. The semi-tubular surgical access device of claim 1, wherein: The semi-tubular body (1) is made of medical-grade polypropylene material, and the graduation accuracy of the scale surface is ±0.1ml, which is used to accurately locate the operation depth during surgery.

5. The semi-tubular surgical access device of claim 1, wherein: The clamping assembly includes clamping pieces (5) symmetrically arranged on the top and bottom surfaces of the syringe wing (4). The shape of the clamping pieces (5) fits the semi-tubular body (1). An extension tube (6) is fixedly arranged on the bottom surface of the clamping piece (5) at the lower end. The extension tube (6) is semi-tubular in shape.

6. A semi-tubular surgical access device according to claim 5, wherein: Both sides of the two clamping plates (5) are provided with through mounting holes, and bolts (7) are inserted into the mounting holes. The bolts (7) pass through the two mounting holes and are threaded with rotating caps (8) at the top.

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