Arthroscopic access cannula

Abstract

The application provides an arthroscopic access cannula, and relates to the technical field of medical devices, which comprises an outer cannula and an inner tube installed in the middle part of the inner side of the outer cannula, the inner tube is provided as a hollow structure, a rubber plug is installed at the top of the inner tube, the bottom of the inner tube is provided with a fixing disc, and a plurality of groups of notches are formed in the middle part of the fixing disc; the outer wall of the outer cannula is provided with a fixing ring which is threadedly connected with the outer cannula, the bottom end surface of the fixing ring is provided with a rubber pad; the inner tube is threadedly installed in the middle part of the inner side of the outer cannula, the middle part of the outer wall of the inner tube is provided with an elastic sealing ring; and the plurality of groups of notches are uniformly distributed in the axial direction. In the use process, the access cannula can be implanted and installed without needing to expand the wound of a patient, so that the tearing of the wound is effectively avoided, and the setting of the fixing disc and the fixing ring enables the access cannula to be limited and fixed, so that the loosening and falling of the access cannula is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an arthroscopic access cannula. Background Technology

[0002] An arthroscopy is an optical instrument used to observe the internal structures of a joint and is an endoscope used to diagnose and treat joint diseases. During arthroscopic surgery, instruments need to be repeatedly inserted and withdrawn through the portal, a process that can easily lead to multiple perforations in the joint capsule, increasing the likelihood of damage to nerves, blood vessels, and vital tissues. Therefore, an arthroscopic cannula is generally used to establish a working channel for arthroscopic surgical access protection, allowing other arthroscopic surgical instruments to enter the joint cavity through this channel.

[0003] Arthroscopic access cannulas are primarily used to protect the joint capsule and other vital tissues during arthroscopic surgery. During the procedure, instruments need to be repeatedly inserted and removed from the access channel; without access protection, multiple injuries to the joint capsule can easily occur. Currently, arthroscopic access cannulas are made of smooth, rigid plastic. However, due to their low surface roughness, these cannulas are prone to dislodging after insertion, reducing surgical efficiency and potentially increasing the risk of injury to the patient, thus affecting subsequent surgical procedures.

[0004] To address the aforementioned issues, we propose an arthroscopic access cannula. Utility Model Content

[0005] To address the problems in the background art, this utility model provides an arthroscopic access cannula.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An arthroscopic access cannula includes an outer tube and an inner tube installed in the middle of the inner side of the outer tube. The inner tube is hollow and a rubber plug is inserted into the top of the inner tube. A fixing plate is provided at the bottom of the inner tube, and multiple sets of notches are formed in the middle of the fixing plate. A fixing ring is provided on the outer wall of the outer tube, and the fixing ring is threaded to the outer tube. A rubber pad is provided on the bottom end face of the fixing ring.

[0008] Preferably, the inner tube thread is installed in the middle of the inner side of the outer tube, and an elastic sealing ring is provided in the middle of the outer wall of the inner tube.

[0009] Preferably, the multiple sets of notches are evenly distributed axially, so that the fixed disk is divided into a multi-lobed structure.

[0010] Preferably, the fixing plate is located at the bottom of the outer tube, and the rubber plug is located at the top of the outer tube.

[0011] Preferably, the rubber plug has a cross-shaped cut at the center of its inner side.

[0012] Preferably, the fixing plate is shaped like a horn and made of elastic silicone material.

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

[0014] The access tube proposed in this utility model can be implanted without opening the patient's wound during use, thereby reducing the size of the wound and effectively preventing tearing. In addition, the setting of the fixing plate and fixing ring can limit and fix the access tube, preventing it from loosening and falling off. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a side sectional view of the present invention.

[0018] In the diagram: 1. Outer tube; 2. Inner tube; 3. Elastic sealing ring; 4. Fixing disc; 5. Notch; 6. Fixing ring; 7. Rubber plug; 8. Cross cut; 9. Rubber gasket. Detailed Implementation

[0019] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0020] Example: Refer to Figure 1 - Figure 3 As shown, an arthroscopic access cannula of this embodiment includes an outer tube 1 and an inner tube 2 installed in the middle of the inner side of the outer tube 1. The inner tube 2 is a hollow structure, and a rubber plug 7 is inserted and installed at the top of the inner tube 2. A fixing plate 4 is provided at the bottom of the inner tube 2. Multiple sets of notches 5 are opened in the middle of the fixing plate 4. The notches 5 are provided so that the fixing plate 4 can be squeezed together when subjected to force, thereby reducing the volume.

[0021] The outer wall of the outer tube 1 is provided with a fixing ring 6, which is threaded to the outer tube 1. The bottom end of the fixing ring 6 is provided with a rubber pad 9, which protects the patient's skin and prevents the fixing ring 6 from directly contacting the patient's skin, thus providing a protective barrier.

[0022] The inner tube 2 is threaded and installed in the middle of the inner side of the outer tube 1. An elastic sealing ring 3 is provided in the middle of the outer wall of the inner tube 2. The elastic sealing ring 3 mainly plays a sealing role in the connection between the inner tube 2 and the outer tube 1, so as to prevent gaps from appearing between the two and causing air and liquid leakage from the wound.

[0023] Multiple sets of notches 5 are evenly distributed axially, which divides the fixed plate 4 into a multi-lobed structure. This makes it easy for the fixed plate 4 to be squeezed when the inner tube 2 applies pressure outward, so that the fixed plate 4 can be retracted into the inner cavity of the outer tube 1 for temporary storage.

[0024] In some examples, the fixing disc 4 is located at the bottom of the outer tube 1, and the rubber plug 7 is located at the top of the outer tube 1.

[0025] In some examples, a cross-shaped incision 8 is provided in the middle of the inner side of the rubber plug 7 to facilitate the entry of medical devices for treatment through the rubber plug 7.

[0026] In some examples, the fixation disc 4 is shaped like a horn and made of elastic silicone material, which makes it easy to squeeze and store the fixation disc 4 into the outer tube 1, thereby reducing the volume of the outer tube 1, providing convenience for the implantation and installation of the outer tube 1, reducing the number of puncture wounds for patients and improving medical outcomes.

[0027] The working principle of this utility model is as follows:

[0028] The access cannula proposed in this utility model does not require opening the patient's wound during use. It can be implanted simply by puncturing with a puncture instrument, thereby reducing the size of the wound and effectively avoiding tearing. In addition, the setting of the fixing plate 4 and the fixing ring 6 can limit and fix the access cannula, preventing it from loosening and falling off.

[0029] The specific usage process is as follows: During installation, a puncture device is required. First, medical personnel use the puncture device to puncture the skin before installing the cannula. Before installation, the staff needs to insert the inner tube 2 into the outer tube 1 and twist the head of the inner tube 2 to create a threaded connection between the inner tube 2 and the outer tube 1. When rotating the inner tube 2, the fixing plate 4 at the bottom of the inner tube 2 will squeeze into the outer tube 1. Because multiple notches 5 are opened in the middle of the fixing plate 4, the fixing plate 4 can be completely squeezed into the outer tube 1, thereby reducing the volume at the bottom of the outer tube 1 without opening the wound. This allows the outer tube 1 to be inserted... The inner tube 2 is inserted into the wound at the bottom. Then, by rotating the inner tube 2 in the opposite direction, the fixation plate 4 extends from the bottom of the outer tube 1. At this point, the outer tube 1 is no longer restrictive. Under the action of the elastic silicone material, the fixation plate 4 unfolds and forms a trumpet shape. Then, the medical staff pulls the outer tube 1 outward until the fixation plate 4 contacts the inner wall of the skin. At this time, the medical staff needs to twist the fixation ring 6 outside the skin until the fixation ring 6 contacts the outer surface of the patient's skin. The fixation ring 6 and the fixation plate 4 thus clamp and fix both ends of the patient's skin, thereby limiting and locking the cannula of this approach, enhancing the stability during use, and preventing loosening.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An arthroscopic access cannula characterized in that, It includes an outer tube (1) and an inner tube (2) installed in the middle of the inner side of the outer tube (1). The inner tube (2) is configured as a hollow structure, and a rubber plug (7) is inserted and installed at the top of the inner tube (2). A fixing plate (4) is provided at the bottom of the inner tube (2), and multiple sets of notches (5) are opened in the middle of the fixing plate (4). The outer wall of the outer sleeve (1) is provided with a fixing ring (6), which is threadedly connected to the outer sleeve (1). The bottom end face of the fixing ring (6) is provided with a rubber pad (9).

2. The arthroscopic access cannula according to claim 1, characterized in that, The inner tube (2) is threadedly installed in the middle of the inner side of the outer tube (1), and an elastic sealing ring (3) is provided in the middle of the outer wall of the inner tube (2).

3. The arthroscopic access cannula according to claim 2, characterized in that, The multiple sets of notches (5) are evenly distributed axially, which divides the fixed disk (4) into a multi-lobed structure.

4. The arthroscopic access cannula according to claim 3, characterized in that, The fixing plate (4) is located at the bottom of the outer tube (1), and the rubber plug (7) is located at the top of the outer tube (1).

5. The arthroscopic access cannula according to claim 4, characterized in that, The rubber plug (7) has a cross-shaped cut (8) in the middle of its inner side.

6. The arthroscopic access cannula according to claim 5, characterized in that, The fixing plate (4) is shaped like a horn and made of elastic silicone material.

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