Tissue removal bag for removing tissue from surgical site

Abstract

A tissue extraction bag for extracting tissue from a surgical site, comprising: an elongate extraction wire having a proximal end and a distal end; a container having a closed end and an expandable open end wherein at least a portion of the opening is arranged to be positioned adjacent to the distal end of the extraction wire and at least one continuous portion of the open end is embossed thereby forming an elastic structure in the shape of a circular ring having a cross-sectional area; the container includes a membrane check valve configured in the form of a star-shaped structure, and a perimeter of the membrane check valve that expands when receiving tissue is equal to or greater than a perimeter of an open end of the container, and the membrane check valve is configured to be partially adjacent to the circular ring, the membrane check valve has an open end such that when the membrane check valve is pushed to receive tissue through the open end, a tapered shape can be formed, and the tapered shape has a height in the range of 15% to 60%, and preferably in the range of 20% to 30% of the height of the container.

Description

Technical Field

[0001] The present invention relates to a tissue extraction bag for extracting tissue from a surgical site. Background Art

[0002] Endoscopic surgical extraction bags have been known previously. Generally, such bags are made of a flexible and durable material. Such bags are deployed within a body cavity and are closed with a separate thread or drawstring after the bag has been filled with excised material. These prior arts include the disclosure based on U.S. Application No. US20040158261A1, in which a drawstring is provided near the edge of the opening 16, and the drawstring is adapted to be tightened around a tissue stalk to seal and lock the bag. Some prior arts also include additional devices for facilitating the opening of the bag and the capture of tissue during laparoscopic surgery. These prior arts include the disclosure based on U.S. Patent No. US5279539A, in which the device is a surgical bag with two drawstrings. The first drawstring is made of an elastic cord-like thread for keeping the mouth of the bag open during use and can be detached from the bag. The second drawstring is intended to tie the mouth of the bag after the organ or tissue has been enclosed and the first drawstring has been detached. However, having separate additional components results in more complexity in terms of the manufacturing process, the components required for manufacturing, and the costs associated with these components. There may also be problems with the learning process related to the control of the components associated with the endoscopic surgical extraction bag required during the actual operation process.

[0003] Therefore, there is a need to develop an easy-to-use endoscopic bag while minimizing the number of components to facilitate manufacturing and use. However, such development also faces various challenges. These challenges include issues regarding the appropriate material, the dimensional structure of such material, and the appropriate mechanism to be integrated with such material in order to fix the extracted tissue within the extraction bag. The appropriateness mentioned also requires specific optimization of the relevant parameters related to the above issues. Summary of the Utility Model

[0004] One of the objectives of the present utility model is to provide a tissue extraction bag for extracting tissue, which has the minimum number of required components and still has a mechanism to prevent the tissue from returning through the opening.

[0005] A tissue retrieval bag for removing tissue from a surgical site according to the present invention comprises: an elongated retrieval line having a proximal end and a distal end; a container having a closed end and an expandable open end, wherein at least a portion of the opening is positioned adjacent to the distal end of the retrieval line, and at least one continuous portion of the open end is embossed to form an elastic structure in the shape of a circular ring having a cross-sectional area; wherein the container comprises a film check valve, the film check valve being configured in the form of a star-shaped structure, and the circumference of the film check valve when expanding when receiving tissue is equal to or greater than the circumference of the open end of the container, and the film check valve being configured to be partially adjacent to the circular ring, so that the film check valve can form a tapered shape when pushed when receiving tissue, and the tapered shape has a height in the range of 15% to 60% of the height of the container, and preferably, the tapered shape has a height in the range of 20% to 30% of the height of the container.

[0006] In one aspect, the conical shape comprises a circular base arranged adjacent to the annular ring and a tip of the cone positioned downwardly inside the container, the conical shape being configured such that: the radius of the circular base is substantially the same as the radius of the open end of the container, and the cone height is in the range of 10% to 50% of the total height of the diaphragm check valve, and preferably the cone height is in the range of 15% to 25% of the total height of the diaphragm check valve.

[0007] On the other hand, the star structure is a multi-vertex star structure, and the size of the multi-vertex star is calculated based on the relationship between the number of vertices of the star and the length of the vertices of the star based on the following formula:

[0008] n(2L) = the circumference of the outlet end of the membrane check valve,

[0009] Pi(D) = the circumference of the inlet end of the membrane check valve,

[0010] Where Pi = 3.1416,

[0011] D = diameter of the open end of the bag,

[0012] N = the number of vertices of the star,

[0013] L = length of the apex of the star, where 2L = D.

[0014] In a possible implementation manner, the number of the multiple vertices of the star-shaped element is 3.

[0015] In another aspect, the thin film check valve made from the thermoplastic substrate has a thickness in the range of 50 microns to 200 microns, preferably the thin film check valve made from the thermoplastic substrate has a thickness in the range of 80 microns to 150 microns.

[0016] In another aspect, the thermoplastic substrate is made of a polyolefin, low density polyethylene, or preferably, the thermoplastic substrate is made of a linear low density polyethylene octene copolymer.

[0017] The objects and unique features and other aspects of the present invention will be described in more detail through the included examples and drawings, and the best mode will also be further described. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of one embodiment of the present invention is shown.

[0019] Figure 2 A top view of an opening according to one embodiment of the present invention is shown.

[0020] Figure 3 The figure shows the position of the internal structure according to one embodiment of the present invention.

[0021] Figure 4 A perspective view of a preferred film check valve according to the present disclosure is shown. DETAILED DESCRIPTION

[0022] In order to make the description clearer, the following examples will be used with reference to the accompanying Figure 1 A more detailed description of the present invention is provided below. The same parts in these drawings will be identified by the same reference numerals. However, the more detailed description provided does not limit the scope of the present invention.

[0023] In this regard, the present invention can be implemented or applied in a variety of ways. This disclosure will provide different examples as references for implementations or applications with the same features. However, as mentioned above, these examples do not limit the scope of the present invention in any way.

[0024] The tissue retrieval bag for removing tissue from a surgical site according to the present invention comprises: an elongated retrieval line 101 having a proximal end and a distal end; a container 103 having a closed end 107 and an expandable open end 105, wherein at least a portion of the opening is arranged adjacent to the distal end of the retrieval line, and at least one continuous portion of the open end is embossed to form an elastic structure in the shape of a ring 109 having the following characteristics: Figure 1 The cross-sectional area shown is characterized by Figure 2The container shown includes a membrane check valve 201, which is configured in the form of a star structure 203, and the circumference of the membrane check valve that expands when receiving tissue is equal to or greater than the open end and part of the container, and the membrane check valve is configured to be adjacent to a circular ring in part, so that when the membrane check valve is pushed by receiving tissue through the open end, a conical shaped member can be formed, and the height of the conical shaped member is in the range of 15% to 60% of the height of the container, preferably in the range of 20% to 30% of the height of the container. The purpose of the membrane check valve is to prevent any accidental leakage, unless the removed tissue is pulled out by a doctor.

[0025] Figure 3 The position of the internal structure according to one of the embodiments of the present invention is shown. Figure 4 A perspective view of a preferred membrane check valve according to the present disclosure is shown. In the Figure 4 components, namely a planar annular member 401, a conical slope member 402, and a narrow polygonal slit member 403, can be seen.

[0026] The conical shaped member includes a circular base arranged adjacent to the circular ring and the tip 301 of the cone positioned downward inside the container. The conical shaped member is configured such that the radius of the circular base is substantially the same as the radius of the open end of the container, and the conical height is in the range of 10% to 50% of the total height of the membrane check valve, and preferably in the range of 15% to 25% of the total height of the membrane check valve. In a possible embodiment, the membrane check valve can be attached to the circular ring by a method of thermal sealing or ultrasonic sealing.

[0027] It should be noted that the star structure is a multi-vertex star structure, and the size of the multi-vertex star member can be calculated based on the following formula according to the relationship between the number of vertices of the star member and the length of the vertices of the star member:

[0028] n(2L) = the circumference of the outlet end of the membrane check valve,

[0029] Pi(D) = the circumference of the inlet end of the membrane check valve,

[0030] where Pi = 3.1416,

[0031] D = the diameter of the open end of the bag,

[0032] n = the number of vertices of the star member,

[0033] L = the length of the vertices of the star member, where 2L = D

[0034] In a possible embodiment, the number of vertices of the star member can be set to 3.

[0035] Additionally, in a preferred embodiment, the thin film check valve can be made of a thermoplastic substrate having a thickness in the range of 50 microns to 200 microns, preferably 80 microns to 150 microns. Such a thermoplastic substrate can be made of polyolefin, low density polyethylene, or preferably linear low density polyethylene octene copolymer.

[0036] Additionally, in a possible embodiment, the space of the slit at the inlet end of the thin film check valve is in the range of 0.1 mm to 2.0 mm, preferably in the range of 0.2 mm to 1.0 mm. Since the outlet end is a thin film with a soft and foldable structure, any force applied from the inside of the bag to the outlet will cause the outlet end to close and prevent any liquid or tissue from spilling out. In addition, the rigidity of the thin film check valve may not be the same and can vary according to the specified section or area. The thickness can also gradually decrease from the thickness at the inlet end towards the thickness at the outlet end.

[0037] The thickness at the inlet is in the range of 100 microns to 250 microns, and preferably in the range of 120 microns to 240 microns. The thickness gradually decreases towards the outlet end as described above and becomes thinnest at the outlet end, where the thickness is in the range of 20 microns to 60 microns, preferably in the range of 25 microns to 40 microns.

[0038] Although the present utility model has been described in detail using the drawings as examples, it should be understood that the present utility model is intended to cover any modifications or solutions provided by those skilled in the art. The scope of the present utility model is based on the claims and covers any features of the present utility model that may not be specifically specified in the claims but still produce the same effects as the present utility model.

[0039] The best mode of the present utility model

[0040] As disclosed in the disclosure of the present utility model.

Claims

1. A tissue extraction bag for extracting tissue from a surgical site, the tissue extraction bag comprising: An elongated extraction wire (101) having a proximal end and a distal end; A container (103) having a closed end (107) and an expandable open end (105), wherein at least a portion of the open end (105) is arranged to be positioned adjacent to the distal end of the extraction wire, and at least one continuous portion of the open end is embossed to form an elastic structure in the shape of a ring (109) having a cross-sectional area; Characterized in that the container comprises a membrane check valve (201), the membrane check valve (201) being configured in the form of a star structure (203), and the circumference of the membrane check valve when expanding upon receiving tissue is equal to or greater than the circumference of the open end of the container, and the membrane check valve (201) is configured to be partially adjacent to the ring such that when the membrane check valve is pushed by receiving tissue through the open end, a conical shaped member can be formed, and the height of the conical shaped member is in the range of 15% to 60% of the height of the container.

2. The tissue removal bag for removing tissue from a surgical site according to claim 1, characterized in that, The conical shaped member comprises a circular base arranged adjacent to the ring and a tip (301) of the cone positioned downwardly inside the container, the conical shaped member being configured such that the radius of the circular base is the same as the radius of the open end of the container, and the height of the conical shaped member is in the range of 10% to 50% of the total height of the membrane check valve.

3. The tissue removal bag for removing tissue from a surgical site according to claim 1 or 2, characterized in that, The star structure is a multi-vertex star structure, and based on the following formula, the size of the multi-vertex star structure is calculated according to the relationship between the number of vertices of the star structure and the length of the vertices of the star structure: n(2L) = the circumference of the outlet end of the membrane check valve, Pi(D) = the circumference of the inlet end of the membrane check valve, wherein, Pi = 3.1416, D = the diameter of the open end of the tissue extraction bag, N = the number of vertices of the star structure, L = the length of the vertices of the star structure, where 2L = D.

4. The tissue removal bag for removing tissue from a surgical site according to claim 3, wherein The number of vertices of the star structure is 3.

5. The tissue extraction bag for extracting tissue from a surgical site according to claim 1 or 2, characterized in that, The membrane check valve made of a thermoplastic substrate has a thickness in the range of 50 microns to 200 microns.

6. The tissue removal bag for removing tissue from a surgical site according to claim 5, wherein The thermoplastic substrate is made of polyolefin, low density polyethylene.

7. The tissue extraction bag for extracting tissue from a surgical site according to claim 1, wherein, The conical shaped member has a height in the range of 20% to 30% of the height of the container.

8. The tissue removal bag for removing tissue from a surgical site according to claim 1 or 2, characterized in that, The height of the conical shaped member is in the range of 15% to 25% of the total height of the membrane check valve.

9. The tissue removal bag for removing tissue from a surgical site according to claim 1 or 2, characterized in that, The membrane check valve made of a thermoplastic substrate has a thickness in the range of 80 microns to 150 microns.

10. The tissue removal bag for removing tissue from a surgical site according to claim 5, characterized in that, The thermoplastic substrate is made of linear low density polyethylene octene copolymer.

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