Laparoscopic surgical specimen retrieval device

Abstract

This utility model discloses a laparoscopic surgical specimen retrieval device, relating to the field of medical device technology. The utility model includes a cannula with a specimen bag inside its cavity; an annular sleeve is fixedly connected to the top of the specimen bag, and a pull-out line is provided inside the annular sleeve. By incorporating the annular sleeve, pull-out line, and elastic diagonal strip, this utility model achieves rapid shaping and automatic sealing of the specimen bag, significantly improving the convenience and safety of surgical operations. The pull-out line within the annular sleeve pulls the specimen bag opening evenly, shaping it into a regular elongated shape within the abdominal cavity, facilitating retrieval through the trocar orifice and avoiding the risk of needing to dilate the orifice due to excessive specimen volume. Simultaneously, the elastic diagonal strip automatically rebounds after detaching from the cannula, further tightening the bag opening to form a reliable mechanical seal, effectively preventing specimen leakage or gas escape from the abdominal cavity, ensuring the sterility of the surgical environment, and improving surgical efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a laparoscopic surgical specimen retrieval device. Background Technology

[0002] Laparoscopic surgery is a minimally invasive surgical technique that involves making a few small incisions in the patient's abdomen and using a laparoscope for diagnosis and treatment. Compared with traditional open surgery, laparoscopic surgery has the advantages of less trauma, faster recovery, less pain, shorter hospital stay, less bleeding, and lower postoperative complications. The entire surgical procedure is usually performed under anesthesia. Through small incisions, a laparoscope and other surgical instruments are inserted, allowing doctors to observe the internal condition of the abdominal cavity in real time via video imaging and perform delicate operations such as resection, suturing, or repair.

[0003] Current laparoscopic surgery techniques still present several challenges in specimen retrieval. For instance, laparoscopic surgery typically requires specimen bags to remove the appendix, gallbladder, or other removed abdominal tissue specimens through the trocar port. However, existing specimen bags are often bulky and difficult to position accurately during surgery, making specimen retrieval through the trocar port challenging. Furthermore, the lack of effective positioning mechanisms makes it difficult for surgeons to control the bag's position and orientation, increasing the complexity and uncertainty of the procedure. More importantly, most specimen bags currently fail to automatically seal after specimen retrieval, increasing the risk of specimen exposure and potentially leading to gas leakage or contamination within the abdominal cavity, thus compromising the sterile surgical environment.

[0004] To address these issues, we have developed a laparoscopic surgical specimen retrieval device. Utility Model Content

[0005] The purpose of this invention is to provide a laparoscopic surgical specimen removal device that facilitates the shaping of the specimen bag and the sealing of the bag opening. This solves the problems of existing laparoscopic surgical specimen removal devices, which have large specimen bags that are inconvenient to remove and cannot automatically seal the bag opening.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model is a laparoscopic surgical specimen retrieval device, including a cannula, the inner cavity of which is provided with a specimen bag; the top of the specimen bag is fixedly connected to an annular sleeve, the inner cavity of the annular sleeve is provided with a pull line, a retainer is fixedly connected to one side of the surface of the specimen bag, and elastic diagonal strips are fixedly connected to the bottom of the retainer around its perimeter.

[0008] The present invention is further configured such that the specimen bag is composed of a tightening section and a folding section, the top of the tightening section is fixedly connected to the surface of the annular sleeve, and the bottom of the folding section is designed to be sealed.

[0009] The present invention is further configured such that a soluble binding band is fixedly connected to the surface of the folded segment, and the soluble binding band is made of polyethylene glycol.

[0010] The present invention is further configured such that the inner cavity of the annular sleeve is provided with a pull-out hole, and the pull-out wire is disposed in the inner cavity of the pull-out hole.

[0011] The present invention is further configured such that the annular sleeve is made of medical-grade polyurethane, which has high strength and flexibility.

[0012] The present invention is further configured such that the elastic diagonal strip is a pre-bent nickel-titanium alloy sheet, which is used to provide a stronger retraction force.

[0013] The present invention has the following beneficial effects.

[0014] 1. This utility model achieves rapid shaping and automatic sealing of the specimen bag by setting up an annular sleeve, a pull line, and an elastic oblique strip, which significantly improves the convenience and safety of surgical operations. By pulling the pull line inside the annular sleeve, the opening of the specimen bag can be evenly contracted, shaping it into a regular elongated shape in the abdominal cavity, making it easy to remove through the trocar orifice and avoiding the risk of needing to dilate the orifice due to the large size of the specimen. At the same time, the elastic oblique strip automatically rebounds after being removed from the sleeve, further tightening the bag opening and forming a reliable mechanical seal, effectively preventing specimen leakage or gas escape from the abdominal cavity, ensuring the sterility of the surgical environment, and improving surgical efficiency.

[0015] 2. This invention utilizes a soluble binding band that dissolves rapidly upon contact with bodily fluids, allowing the specimen bag to automatically unfold and fit the sleeve, reducing manual adjustments. The high-strength polyurethane ring sleeve combined with nickel-titanium alloy elastic diagonal strips ensures stability and fatigue resistance during the pulling and unpulling process, maintaining structural integrity even with repeated pulling. Furthermore, the sealed design at the bottom of the specimen bag prevents tissue or fluid leakage, while the composite structure of the layered tightening section and folding section further optimizes the shaping effect, making it suitable for the removal of specimens of different sizes and broadening its clinical application scope.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1A three-dimensional view of a laparoscopic surgical specimen retrieval device.

[0019] Figure 2 An exploded view of the cannula and specimen bag in a laparoscopic surgical specimen retrieval device.

[0020] Figure 3 An exploded view of the specimen bag and ferrule in a laparoscopic surgical specimen retrieval device.

[0021] Figure 4 An exploded view of the annular sleeve and pull line in a laparoscopic surgical specimen retrieval device.

[0022] In the attached diagram: 1. Sleeve; 2. Specimen bag; 3. Annular sleeve; 4. Retractable cord; 5. Clip; 6. Elastic diagonal strip; 7. Tightening section; 8. Folding section; 9. Dissolvable restraint strap; 10. Pull-out hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Please see Figures 1-4 This invention relates to a laparoscopic surgical specimen retrieval device, comprising a cannula 1, which can store a shrunken and shaped specimen bag 2. This allows the specimen bag 2 to extend into the wound when the cannula 1 is inserted into the trocar opening, facilitating the subsequent dissolvable binding band 9 on the surface of the specimen bag 2 through bodily fluids, thus allowing the specimen bag 2 to extend. The specimen bag 2 is housed within the inner cavity of the cannula 1. The specimen bag 2 is retractable, cylindrical in shape, and when the pull cord 4 is fully tightened, the minimum opening area of ​​the specimen bag 2 is 1.0cm x 1.0cm, with a length of 6-10cm. A ring sleeve 3 is fixedly connected to the top of the specimen bag 2, and a pull cord 4 is located within the inner cavity of the ring sleeve 3. The pull cord 4 is connected to the specimen bag 2 via the ring sleeve 3 to improve the connection between the pull cord 4 and the specimen bag 2. The specimen bag 2 is designed with a U-shaped pull line 4, which extends into the tightening section 7 and folding section 8 of the specimen bag 2. This allows the pull line 4 to stretch the specimen bag 2 into a slender cylindrical shape when stretched, so that the specimen bag can be placed inside the sleeve 1. This prevents the specimen bag from being too large to fit or be taken out, thus affecting its use. A retainer 5 is fixedly connected to one side of the specimen bag 2. The retainer 5 can be locked onto the top of the sleeve 1. The elasticity of the elastic diagonal strip 6 can lock the opening of the specimen bag 2 into the sleeve 1, ensuring the stability of the opening. Elastic diagonal strips 6 are fixedly connected to the bottom of the retainer 5. After the elastic diagonal strips 6 are separated from the sleeve 1, they can automatically retract and clamp, thereby sealing the opening of the bag and allowing the specimen bag 2 to close automatically.

[0026] Example 2

[0027] Please see Figures 1-4 Based on Example 1, the specimen bag 2 is composed of a tightening section 7 and a folding section 8. The top of the tightening section 7 is fixedly connected to the surface of the annular sleeve 3. The tightening section 7 is located inside the sleeve 1 near the top, which facilitates sealing the bag opening after the specimen is removed. The bottom of the folding section 8 is designed to be sealed. The folding section 8 can be folded into multiple layers to ensure that it is completely within the cavity of the sleeve 1 when inserted into the wound. A dissolvable restraint band 9 is fixedly connected to the surface of the folding section 8. The dissolvable restraint band 9 is made of polyethylene glycol. The polyethylene glycol dissolvable restraint band 9 generally deteriorates after contact with body fluids. It dissolves in just 10-30 seconds, allowing for quick and easy extension of the folded section 8. The inner cavity of the annular sleeve 3 has a pull-out hole 10, which allows the pull-out cord 4 to be pulled out, shrinking the bag opening and reducing the overall volume of the specimen bag 2 for easy removal. The pull-out cord 4 is located inside the pull-out hole 10. The annular sleeve 3 is made of medical-grade polyurethane, which has high strength and flexibility. The medical-grade polyurethane material of the annular sleeve 3 ensures good toughness between the pull-out cord 4 and the specimen bag 2, facilitating repeated pulling and unpulling. The elastic diagonal strip 6 is a pre-bent nickel-titanium alloy sheet, used to provide strong retraction force.

[0028] The working principle of this utility model is as follows: First, the folded specimen bag 2 is inserted into the Trocar orifice through the sleeve 1. After entering the abdominal cavity, the soluble binding band 9 made of polyethylene glycol on the surface of the specimen bag 2 dissolves rapidly within 10-30 seconds after contact with the body fluid, causing the folded section 8 to automatically unfold and fit into the sleeve 1. At this time, the elastic oblique strip 6 nickel-titanium alloy sheet at the bottom of the ferrule 5 springs open and locks into the outer wall of the sleeve 1, stabilizing the position of the bag opening so that the specimen can be inserted.

[0029] After a specimen, such as a gallbladder or appendix, is placed in the bag, the doctor pulls the pull line 4, causing the bag opening to shrink evenly through the pull hole 10 of the ring sleeve 3. This shapes the specimen bag 2 into a strip with a minimum cross-sectional area of ​​1.0cm × 1.0cm and a length of 6-10cm within the abdominal cavity, facilitating removal through the trocar orifice. Subsequently, the bag opening is lifted, causing the elastic diagonal strip 6 to detach from the cannula 1. Its pre-bent structure automatically rebounds, further tightening the bag opening to form a mechanical seal, preventing specimen leakage or gas escape. Finally, the entire cannula 1 is withdrawn, completing the sealed removal of the specimen. The entire process requires no enlarging or additional locking operations, combining high efficiency and safety.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A laparoscopic surgical specimen retrieval device, comprising a cannula (1), characterized in that: The inner cavity of the sleeve (1) is provided with a specimen bag (2); the top of the specimen bag (2) is fixedly connected with an annular sleeve (3), the inner cavity of the annular sleeve (3) is provided with a pull line (4), a card sleeve (5) is fixedly connected to one side of the surface of the specimen bag (2), and elastic diagonal strips (6) are fixedly connected to the bottom of the card sleeve (5) around its perimeter.

2. The laparoscopic surgical specimen extraction device according to claim 1, wherein: The specimen bag (2) is composed of a tightening section (7) and a folding section (8). The top of the tightening section (7) is fixedly connected to the surface of the annular sleeve (3), and the bottom of the folding section (8) is sealed.

3. The laparoscopic surgical specimen extraction device according to claim 2, wherein: The folded section (8) is fixedly connected to a soluble binding band (9), which is made of polyethylene glycol.

4. The laparoscopic surgical specimen extraction device according to claim 1, wherein: The annular sleeve (3) has a pull hole (10) in its inner cavity, and the pull wire (4) is located in the inner cavity of the pull hole (10).

5. The laparoscopic surgical specimen extraction device according to claim 1, wherein: The annular sleeve (3) is made of medical-grade polyurethane, which has high strength and flexibility.

6. The laparoscopic surgical specimen extraction device according to claim 1, wherein: The elastic diagonal strip (6) is a pre-bent nickel-titanium alloy sheet used to provide a strong retraction force.

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