Retrieval bag for endoscopic surgery

Abstract

The invention relates to a retrieval bag (1) for endoscopic surgery, comprising a receiving bag (7) which can be expanded in the interior of a patient's body. In order to produce a retrieval bag (1) which is simple to handle and ensures that the operation can be carried out safely, the invention provides for the receiving bag (7) to be expandable by the introduction of a fluid.

Description

[0001] Retrieval bag for endoscopic surgery

[0002] The invention relates to a retrieval bag for endoscopic surgery with a receiving bag that can be expanded inside a patient's body.

[0003] In endoscopic surgery, retrieval bags are used to isolate, package, and transport tissue fragments from the patient's body through an endoscopic approach. Retrieval bags are used to prevent contamination of the surgical site with removed tissue.

[0004] The retrieval bags are folded and inserted into the surgical site via a trocar and expanded only once inside the patient to collect tissue. In practice, the retrieval bags are usually expanded using endoscopic instruments. However, this procedure has the disadvantage that the retrieval bag must always be held with at least one forceps during the operation and kept open at the entrance.

[0005] Furthermore, DE 102015 012 964 B4 discloses an access system for endoscopic surgery, in which a spreading element equipped with multiple spreading arms can be introduced into the surgical area via the trocar. The spreading element is equipped with a retrieval bag in such a way that the retrieval bag is unfolded upon entry into the surgical area by the radially outwardly extending spreading arms. However, due to the complexity of the spreading element, it is difficult to introduce other medical instruments into the surgical area via this trocar. DE 42 42 153 A1 discloses a retrieval bag for minimally invasive surgery. Rib-shaped volume areas that can be filled with a fluid are provided for expanding the retrieval bag in the body cavity.

[0006] US 5,788,709 A shows a retrieval bag for minimally invasive surgery, which can optionally be double-walled.

[0007] US 8,425,533 A teaches a retrieval bag device consisting of a handle, shaft, and retrieval bag. By operating the handle, the retrieval bag can be mechanically expanded at the distal end of the shaft. Optionally, the retrieval bag can be balloon-expanded using a fluid.

[0008] Based on this, the object of the invention is to create a retrieval bag which ensures a safe surgical procedure while being easy to handle.

[0009] The solution to this problem is characterized according to the invention in that the receiving bag can be expanded by introducing a fluid.

[0010] By expanding the receiving bag using a fluid, external mechanical expansion aids such as additional medical instruments or spreading elements can be dispensed with.

[0011] According to a practical embodiment of the invention, it is proposed that the receiving bag be designed as a double-walled bag, with the two bag walls being connected to each other via webs, and the fluid being introduced into the space between the two bag walls. As soon as the fluid flows into the space between the two bag walls, this space expands and stabilizes, thus automatically expanding the receiving bag formed by the inner bag wall. The double-walled nature of the receiving bag further increases security against damage to the bag wall of the receiving bag when shredding tissue pieces within the receiving bag.

[0012] A preferred embodiment of the invention proposes that the receiving bag be designed as a double-walled bag, wherein the two bag walls are connected to one another via webs designed as tubes, into which the fluid can be introduced to expand the receiving bag. In this embodiment of the receiving bag, too, the double-walled design offers additional security against accidental damage to the receiving bag. According to a practical embodiment of the invention, it is proposed that the receiving bag be suspended from an external support structure, wherein the support structure consists of tubes into which the fluid can be introduced to expand the receiving bag. As soon as the fluid flows into the support structure formed from tubes, this support structure expands and stabilizes, thus automatically expanding the receiving bag suspended from the support structure.

[0013] As the fluid flows into the tubes formed by the bars, these bars expand and stabilize, automatically expanding the collection bag suspended from them. The fluid can be introduced into the tubes completely or in sections.

[0014] In order to prevent the entire recovery bag from collapsing in the event of damage to a hose of the support structure, the invention further proposes that the support structure be redundantly formed from a plurality of hoses that can be filled with the fluid independently of one another.

[0015] In order to be able to easily insert the webs consisting of tubes in a folded state through a trocar into the surgical area, the invention proposes that the tubes be designed as film tubes.

[0016] To form the webs, the invention further proposes that the tubes forming the webs surround the receiving bag in the form of a polygonal honeycomb structure. The polygonal honeycomb structure makes it possible to create a dimensionally stable structure with just a few tubes that supports the receiving bag.

[0017] According to a preferred embodiment of the invention, the polygonal honeycomb structure consists of pentagons and / or hexagons. By combining pentagons and / or hexagons, a spherical shape of the webs can be easily formed, as is known, for example, from the outer shell of soccer balls. Alternatively, it is also possible to form the polygonal honeycomb structure consisting of triangles.

[0018] To fill the tubes of the webs with the fluid, the invention proposes that the tubes forming the webs or the support structure, or the space between the two bag walls, can be filled with the fluid from outside the body via a fluid tube. This allows the fluid to be introduced into the tubes of the support structure in a simple and precise manner, for example, using a syringe. Finally, the invention proposes that the fluid used to expand the receiving bag be air. Alternatively, it is of course also possible to use CO2, helium, water, or a medical rinsing fluid as the fluid.

[0019] A practical embodiment of the invention further proposes that the receiving bag has the shape of a dome, hemisphere or sphere.

[0020] To form the recovery bag, it is further proposed according to the invention that the tubes forming the webs or the support structure are connected completely or only partially to the bag walls of the receiving bag.

[0021] The drawings, the description, and the claims contain numerous features in combination. It is understood that the features mentioned above and those to be explained below can be used not only in the respective combinations specified, but also in other combinations or alone, without departing from the scope of the present invention. Further features and advantages of the invention are apparent from the accompanying drawings, in which three embodiments of a retrieval bag according to the invention for endoscopic surgery are shown only by way of example, without limiting the invention to these embodiments. In the drawings:

[0022] Fig. 1 is a schematic representation of the use of a retrieval bag for endoscopic surgery according to the prior art;

[0023] Fig. 2a is a schematic perspective view showing a first embodiment of a retrieval bag according to the invention;

[0024] Fig. 2b is a schematic perspective view showing a second embodiment of a retrieval bag according to the invention;

[0025] Fig. 3a is a view similar to Fig. 2a, but showing a third embodiment of a retrieval bag according to the invention;

[0026] Fig. 3b is a view similar to Fig. 2b, but showing a fourth embodiment of a retrieval bag according to the invention;

[0027] Fig. 4a is a schematic perspective view showing a fifth embodiment of a retrieval bag according to the invention and

[0028] Fig. 4b is a schematic perspective view showing a sixth embodiment of a retrieval bag according to the invention and

[0029] Fig. 5a is a schematic plan view of a seventh embodiment of a retrieval bag according to the invention. Fig. 5b is a schematic plan view of an eighth embodiment of a retrieval bag according to the invention.

[0030] Figure 1 schematically shows the use of a retrieval bag 1 according to the prior art in an endoscopic surgical procedure.

[0031] In the schematically illustrated laparoscopic procedure, a trocar 2 is inserted into an incision 3 in the abdominal wall 4 of the patient in order to be able to introduce, for example, the retrieval bag 1 and possibly other medical instruments into the surgical area 5 via the trocar 2.

[0032] An endoscope 6 inserted through a further incision 3 in the patient’s abdominal wall 4 is used to observe and guide the surgical procedure.

[0033] In endoscopic surgery, retrieval bags 1 are used to isolate, package, and transport tissue pieces from the surgical area 5 in the patient's body to the outside through an endoscopic access, such as a trocar 2. The retrieval bag 1 is used to prevent contamination of the surgical area with the removed tissue.

[0034] The retrieval bag 1 is folded and inserted into the surgical site 5 via the trocar 2. It is then expanded to collect tissue once inside the patient. In the case of morcellation, the tissue can be packed into the retrieval bag 1 and shredded for removal inside the retrieval bag 1 without the risk of contaminating the surrounding healthy tissue.

[0035] Figure 2a shows a first embodiment for forming a retrieval bag 1.

[0036] The illustrated recovery bag 1 essentially consists of a double-walled receiving bag 7, with an inner bag wall 8 forming the actual receiving bag 7 and an outer bag wall 9 spaced from the inner bag wall 8, wherein the two bag walls 8 and 9 are connected to one another via webs 11 designed as tubes 10, into which a fluid, in particular air, can be introduced to expand the receiving bag 7.

[0037] Alternative fluids for expanding the receiving bag 7 include, for example, CO2, helium, water, and medical rinsing fluids. It is also possible to produce the webs 11 connecting the outer bag wall 9 and the inner bag wall 8, for example, by hot stamping or welding. In this embodiment, the fluid is introduced into the space 12 between the two bag walls 8 and 9.

[0038] As soon as the fluid flows into the space 12 between the two bag walls 8 and 9, this space 12 expands and stabilizes, thus automatically expanding the receiving bag 7 formed by the inner bag wall 8. The double-walled nature of the receiving bag 7 increases security against damage to the inner bag wall 8 of the receiving bag 7 when shredding pieces of tissue within the receiving bag 7.

[0039] As soon as the fluid flows into the webs 11 formed by tubes 10, these webs 11 expand and stabilize, thus automatically expanding the receiving bag 7 suspended from the webs 11.

[0040] In this expanded position, the receiving bag 7 of the retrieval bag 1 is ready to receive removed tissue.

[0041] In order to be able to insert the retrieval bag 1 folded or rolled up as compactly as possible through the trocar 2 into the operating area 5, the tubes 10 are designed as thin-walled film tubes.

[0042] To form the webs 11, the tubes 10 forming the webs 11 surround the receiving bag 7 in the form of a polygonal honeycomb structure. The polygonal honeycomb structure makes it possible to create a dimensionally stable structure with just a few tubes, which supports the receiving bag 7.

[0043] Advantageously, the polygonal honeycomb structure consists of pentagons and / or hexagons. The combination of pentagons and / or hexagons allows for a simple, spherical shape of the webs 11, as is known, for example, from the outer shell of soccer balls.

[0044] In the first embodiment for forming the retrieval bag 1 shown in Fig. 2a, the retrieval bag 1 is designed in the shape of a hemisphere 13.

[0045] The third embodiment of the retrieval bag 1 shown in Fig. 3a differs from the design according to Fig. 2a in that the retrieval bag 1 in this embodiment is designed as a sphere 14. Filling the tubes 10 forming the webs 11 with the fluid to expand the receiving bag 7 occurs via a separate fluid tube 15 connected to the tubes 10, which can be filled with the fluid from outside the body through the trocar 2. This allows the fluid to be introduced into the tubes 10 in a simple and precise manner, for example, using a syringe.

[0046] The receiving bag 7, expanded by the introduction of the fluid, can be easily and quickly filled with tissue to be separated using suitable medical instruments, such as forceps. The double-walled design with the webs 11 connecting the bag walls 8 and 9 ensures that the expanded receiving bag 7 has a stable shape and does not collapse, which could lead to the tissue contained in the receiving bag 7 falling out.

[0047] The filled receiving bag 7 is closed, for example, by clipping or sewing.

[0048] In the embodiment shown in Fig. 3a with a receiving bag 7 designed as a sphere 14, the receiving bag 7 can have a predetermined opening for filling the interior of the bag. However, it is also possible for the receiving bag 7 to be cut open only for filling with the tissue to be separated. This opening can then be easily closed again by clipping or sewing.

[0049] According to the embodiments shown in Fig. 4a, 4b, 5a and 5b, the polygonal honeycomb structure of the webs 11 and tubes 10 can also be formed only from triangles.

[0050] Fig. 4a shows, in perspective, the design of the webs 11, formed as tubes 10, connecting the inner bag wall 8 and the outer bag wall 9 to one another. The inner bag wall 8, which forms the actual receiving bag 7 and is connected at least in sections to the webs 11 or tubes 10, is shown in dashed lines in this illustration only in the peripheral area of ​​the opening of the retrieval bag 1. Otherwise, the shape of the inner bag wall 8 forming the receiving bag 7 corresponds to the hemispherical shape of the webs 11 and tubes 10 on the inside.

[0051] The outer bag wall 9, which is at least partially connected to the webs 11 or tubes 10, is also shown in this illustration only in the peripheral area of ​​the opening of the retrieval bag 1. Otherwise, the shape of the outer bag wall 9 corresponds to the outside of the hemispherical shape of the webs 11 and tubes 10. As an alternative to depicting the retrieval bag 1 as a hemisphere, it is of course also possible to design the retrieval bag 1 thus formed as a three-quarter sphere or a complete sphere.

[0052] The figure Fig. 5a shows a plan view of a retrieval bag 1 in which the webs 11, designed as tubes 10, connecting the inner bag wall 8 and the outer bag wall 9 form six large triangles.

[0053] The inner bag wall 8 forming the receiving bag 7 and the outer bag wall 9 are connected at least in sections to the webs 11 or tubes 10, so that this double-walled recovery bag 1 is expanded when the fluid is introduced into the support structure 16 designed as tubes 9.

[0054] A retrieval bag 1 constructed as described above with reference to the figures is characterized in that it ensures a safe surgical procedure while being easy to handle, which is ensured in particular by the double-walled design of the receiving bag 7.

[0055] Figure 2b shows a second embodiment for forming a retrieval bag 1.

[0056] The illustrated retrieval bag 1 essentially consists of a receiving bag 7 suspended from an external support structure 16. The support structure 16 consists of tubes 10 into which a fluid, in particular air, can be introduced to expand the receiving bag 7. As soon as the fluid flows into the support structure 16 formed from tubes 10, this support structure 16 expands and stabilizes, thus automatically expanding the receiving bag 7 suspended from the support structure 16 without the aid of any additional medical instrument.

[0057] Alternative fluids for expanding the receiving bag 7 include CO2, helium, water and medical rinsing fluids.

[0058] In this expanded position, the receiving bag 7 of the retrieval bag 1 is ready to receive removed tissue.

[0059] To enable the retrieval bag 1 to be inserted through the trocar 2 into the surgical site 5 in a folded or rolled-up manner as compactly as possible, the tubes 10 are designed as thin-walled foil tubes. To form the support structure 16, the tubes 10 forming the outer support structure 16 surround the collection bag 7 in the form of a polygonal honeycomb structure. The polygonal honeycomb structure makes it possible to create a dimensionally stable structure with just a few tubes 10 that supports the collection bag 7.

[0060] Advantageously, the polygonal honeycomb structure consists of pentagons and / or hexagons. The combination of pentagons and / or hexagons can easily form a spherical shape for the support structure 16, as is known, for example, from the outer shell of soccer balls.

[0061] In the second embodiment for forming the retrieval bag 1 shown in Fig. 2b, the retrieval bag 1 is designed in the shape of a hemisphere 13.

[0062] The fourth embodiment of the retrieval bag 1 shown in Fig. 3b differs from the design according to Fig. 2b in that the retrieval bag 1 in this embodiment is designed as a ball 14.

[0063] The tubes 10 forming the support structure 16 are filled with the fluid to expand the receiving bag 7 via a separate fluid tube 15 connected to the tubes 10, which can be filled with the fluid from outside the body through the trocar 2. This allows the fluid to be introduced into the tubes 10 of the support structure 16 in a simple and precise manner, for example, using a syringe.

[0064] The receiving bag 7, expanded by the introduction of the fluid, can be easily and quickly filled with tissue to be separated using suitable medical instruments, such as forceps. The outer support structure 16 ensures that the expanded receiving bag 7 has a stable shape and does not collapse, which could lead to the tissue contained in the receiving bag 7 falling out.

[0065] The filled receiving bag 7 is closed, for example, by clipping or sewing.

[0066] In the embodiment shown in Fig. 3b with a receiving bag 7 designed as a sphere 14, the receiving bag 7 can have a predetermined opening for filling the bag interior. However, it is also possible for the receiving bag 7 to be cut open only for filling with the tissue to be separated. This opening can then be easily closed again by clipping or sewing.

[0067] According to the embodiments illustrated in Figs. 4a, 4b, 5a, and 5b, the polygonal honeycomb structure can also be formed solely from triangles. Fig. 4b shows a perspective view of the design of the support structure 16, consisting of a plurality of small triangles. The receiving bag 7, which is connected at least in sections to the support structure 16 and arranged inside the support structure 16, is shown in dashed lines in this illustration only in the peripheral area of ​​the opening of the retrieval bag 1. Otherwise, the shape of the receiving bag 7 corresponds to that of the inside of the support structure 16, with the receiving bag 7 being connected at least in sections to the support structure.

[0068] As an alternative to the representation of the retrieval bag 1 as a hemisphere, it is of course also possible to design the retrieval bag 1 thus formed as a three-quarter sphere or a complete sphere.

[0069] Figure 5b shows a top view of a recovery bag 1 in which the support structure 16 consists of six large triangles. The receiving bag 7 is connected to the support structure 16 at least in sections, so that it expands when the fluid is introduced into the support structure 16, which is designed as tubes 10.

[0070] The retrieval bags 1 designed as described above can of course be used not only in endoscopic surgery, but also in classical open surgery.

[0071] A retrieval bag 1 constructed as described above with reference to the illustrations is characterized by the fact that it ensures a safe surgical procedure while being easy to handle.

[0072] The drawings, the description, and the claims contain numerous features in combination. It is understood that the aforementioned features can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the present invention. The invention relates to a retrieval bag 1 for endoscopic surgery with a receiving bag 7 that can be expanded inside a patient's body. In order to create a retrieval bag 1 that ensures a safe surgical procedure while being easy to handle, the invention proposes that the receiving bag 7 be expandable by introducing a fluid. List of Reference Symbols

[0073] 1 retrieval bag

[0074] 2 T rokar

[0075] 3 Incision

[0076] 4 Abdominal wall

[0077] 5 Operational area

[0078] 6 Endoscope

[0079] 7 collection bags

[0080] 8 inner bag wall

[0081] 9 outer bag wall

[0082] 10 hose

[0083] 11 jetty

[0084] 12 space

[0085] 13 hemispheres

[0086] 14 balls

[0087] 15 Fluid hose

[0088] 16 Supporting structure

Claims

Patent claims 1. A retrieval bag (1) for endoscopic surgery with a receiving bag (7) which can be expanded inside the body of a patient, characterized in that the receiving bag (7) can be expanded by introducing a fluid.

2. Recovery bag (1) according to claim 1, characterized in that the Receiving bag (7) is designed as a double-walled bag, wherein the two bag walls (8, 9) are connected to one another via webs (11) and the fluid can be introduced into the intermediate space (12) between the two bag walls (8, 9).

3. Recovery bag (1) according to claim 1, characterized in that the Receiving bag (7) is designed as a double-walled bag, wherein the two bag walls (8, 9) are connected to one another via webs (11) designed as tubes (10), into which the fluid can be introduced to expand the receiving bag (7).

4. Recovery bag (1) according to claim 1, characterized in that the receiving bag (7) is suspended from an outer support structure (16), the support structure (16) consisting of hoses (10) into which the fluid for expanding the receiving bag (7) can be introduced.

5. Recovery bag (1) according to claim 3 or 4, characterized in that the fluid can be introduced completely or only partially into the tubes (10) forming the webs or the support structure (16).

6. Recovery bag (1) according to one of claims 3 to 5, characterized in that the support structure (16) is redundantly formed from a plurality of hoses (10) which can be filled with the fluid independently of one another.

7. Recovery bag (1) according to one of claims 3 to 6, characterized in that the tubes (10) are designed as film tubes.

8. Recovery bag (1) according to one of claims 2 to 7, characterized in that the tubes (10) forming the webs (11) or the outer support structure (16) surround the receiving bag in the form of a polygonal honeycomb structure.

9. Recovery bag (1) according to claim 8, characterized in that the polygonal honeycomb structure consists of pentagons and / or hexagons.

10. Recovery bag (1) according to claim 8, characterized in that the polygonal honeycomb structure consists of triangles.

11. Recovery bag (1) according to one of claims 3 to 7, characterized in that the tubes (10) forming the webs (11) or the outer support structure (16) or the intermediate space (12) can be filled with the fluid from outside the body via a fluid tube (15).

12. Recovery bag (1) according to one of claims 1 to 11, characterized in that the fluid is air, helium, water or CO2.

13. Recovery bag (1) according to one of claims 1 to 12, characterized in that the receiving bag (7) in the expanded state forms the shape of a dome, hemisphere or sphere.

14. Recovery bag (1) according to one of claims 1 to 13, characterized in that the tubes (10) forming the webs (11) or the support structure (16) are connected completely or only partially to the receiving bag (7).

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