A trocar for laparoscopic surgery

Abstract

This utility model proposes a trocar for laparoscopic surgery, relating to the field of trocar technology. It includes a trocar cone and a trocar cannula assembly. The trocar cone penetrates the trocar cannula assembly. The trocar cannula assembly includes a ventilation connector and a positioning cannula. One end of the positioning cannula is fixedly connected to and communicates with one end of the ventilation connector. The other end of the ventilation connector is detachably connected to the trocar cone. The other end of the positioning cannula is provided with an inflation-expansion blocking part, which communicates with the positioning cannula. This trocar for laparoscopic surgery can flexibly block the abdominal wall, effectively improving the airtightness of the trocar cannula fixed to the patient's abdominal wall.

Description

Technical Field

[0001] This utility model relates to the field of puncture device technology, and in particular to a puncture device for laparoscopic surgery. Background Technology

[0002] In abdominal examinations, abdominal surgeries, and other minimally invasive or surgical procedures, trocars are widely used. Trocars create an access channel in the abdominal wall to allow laparoscopes or other surgical instruments (such as guidewires, catheters, filters, stents, etc.) to enter the abdominal cavity for examinations or surgical procedures.

[0003] Existing trocars use barbs to fix the trocar cannula to the patient's abdominal wall after puncture. However, there is still a gap between the trocar cannula and the abdominal wall, resulting in insufficient sealing. In surgical scenarios that require a certain degree of airtightness, this can easily lead to air leakage, which is not conducive to sealing and fixation.

[0004] Therefore, it is necessary to develop a trocar for laparoscopic surgery to improve the airtightness of the trocar cannula when fixed to the patient's abdominal cavity wall. Utility Model Content

[0005] To address the aforementioned issues, this invention proposes a trocar for laparoscopic surgery to improve the airtightness of the trocar cannula when fixed to the patient's abdominal cavity wall.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes a trocar for laparoscopic surgery, including a trocar and a trocar assembly. The trocar penetrates the trocar assembly. The trocar assembly includes a ventilation connector and a positioning connector. One end of the positioning connector is fixedly connected to and in communication with one end of the ventilation connector. The other end of the ventilation connector is detachably connected to the trocar. The other end of the positioning connector is provided with an inflation expansion blocking part, which is in communication with the positioning connector.

[0008] Furthermore, the inflatable expansion blocking part includes two fixing rings and an annular airbag component. The two fixing rings are respectively fixedly connected to both ends of the annular airbag component. Both fixing rings are sealed and fixedly connected to the positioning sleeve component. The inner side of the annular airbag component is in communication with the positioning sleeve component.

[0009] Furthermore, one end of the positioning sleeve is provided with an installation groove, and both fixing rings are fixedly connected in the installation groove.

[0010] Furthermore, the positioning sleeve is provided with a first ventilation guide groove, which is connected to the annular airbag and the ventilation connector.

[0011] Furthermore, the first ventilation guide channel is provided with a plurality of first support plates, which are evenly distributed around the first ventilation guide channel in a circumferential direction.

[0012] Furthermore, the ventilation connector is provided with a second ventilation guide groove, which is connected to the first ventilation guide groove.

[0013] Furthermore, the second ventilation guide groove is provided with a plurality of second support plates, which are evenly distributed around the second ventilation guide groove in a circumferential direction.

[0014] Furthermore, a first connecting nozzle is provided on one side of the ventilating connector, and the first connecting nozzle is in communication with the second ventilating guide groove.

[0015] Furthermore, one end of the venting connector is provided with a threaded connection end, which is arranged around the second venting guide groove, and one end of the positioning sleeve is provided with a threaded connection port, which forms a sealed and fixed connection with the threaded connection end.

[0016] Furthermore, the inner wall of the threaded connection end is provided with a support ring, which is housed in the second venting groove and is tightly connected to the inner wall of the threaded connection end.

[0017] The beneficial effects of this utility model are:

[0018] This invention employs a puncture cone and puncture cannula assembly to puncture the patient's abdominal cavity. After insertion, the puncture cone is withdrawn, and the positioning cannula is inflated via a pipe connected to the ventilation connector. This causes the inflatable expansion blocking part on the positioning cannula to expand circumferentially within the patient's abdominal cavity, providing flexible obstruction to the abdominal wall. The edge of the inflatable expansion blocking part can fill the gap between the abdominal wall and the positioning cannula after puncture, improving the airtightness after puncture. In summary, this puncture device for laparoscopic surgery can flexibly obstruct the abdominal wall, effectively improving the airtightness of the puncture cannula fixed to the patient's abdominal wall. Attached Figure Description

[0019] Figure 1 This is an exploded view of the trocar used in laparoscopic surgery according to the present invention;

[0020] Figure 2 This is a schematic diagram of the trocar for laparoscopic surgery of this utility model when the inflatable expansion blocking part is inflated.

[0021] Figure 3 This is a schematic diagram of the trocar for laparoscopic surgery of this utility model when the inflation expansion blocking part is not inflated;

[0022] Figure 4 This is a schematic diagram of the positioning cannula and flexible positioning ring of the trocar used in laparoscopic surgery according to this utility model;

[0023] Figure 5 This is a schematic diagram of the ventilation connector of the trocar used in laparoscopic surgery according to this utility model;

[0024] Figure 6 This is a cross-sectional view of the trocar used in laparoscopic surgery according to this utility model;

[0025] Figure 7 This is a schematic diagram of the positioning sleeve of the trocar used in laparoscopic surgery according to this utility model.

[0026] The attached figures are labeled as follows:

[0027] Puncture cone 1;

[0028] The puncture cannula assembly 2 includes a venting connector 21, a second venting guide groove 211, a second support plate 2111, a first connecting nozzle 212, a threaded connecting nozzle 213, a support ring 2131, a second connecting nozzle 214, an insertion groove 215, a positioning cannula assembly 22, an inflation and expansion blocking part 221, a fixing ring 2211, an annular airbag 2212, an installation groove 222, a first venting guide groove 223, a first support plate 2231, a threaded connection port 224, and a guiding groove 225.

[0029] Soft positioning ring 3. Detailed Implementation

[0030] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0031] Please refer to Figures 1-7 This utility model proposes a trocar for laparoscopic surgery, including a trocar 1, a trocar cannula assembly 2, and a soft positioning ring 3. The trocar 1 penetrates the trocar cannula assembly 2. The trocar cannula assembly 2 includes a ventilation connector 21 and a positioning cannula 22. One end of the positioning cannula 22 is fixedly connected to and communicates with one end of the ventilation connector 21. The other end of the ventilation connector 21 is detachably connected to the trocar 1. The other end of the positioning cannula 22 is provided with an inflation expansion blocking part 221. The inflation expansion blocking part 221 is used to block the patient's abdominal cavity wall, so that the trocar cannula assembly 2 remains in the abdominal puncture hole and cannot be pulled out. The inflation expansion blocking part 221 communicates with the positioning cannula 22. The soft positioning ring 3 is sleeved on the trocar cannula assembly 2 and has a preset distance from the inflation expansion blocking part 221.

[0032] In this embodiment, when performing abdominal paracentesis, a puncture cone 1 is used in conjunction with a puncture cannula assembly 2 to puncture the patient's abdominal cavity. After insertion, the puncture cone 1 is withdrawn, and the air volume is adjusted by an external air pump device. Air is supplied to the positioning cannula 22 located in the abdominal cavity through a connecting pipe on the air connection 21, causing the inflation expansion blocking part 221 on the positioning cannula 22 to expand annularly within the patient's abdominal cavity. The diameter of the annular expansion blocking part 221 is larger than the puncture hole. Then, the puncture cannula... Component 2 is pulled outward slightly so that the inflatable expansion blocking part 221 is pressed tightly against the inner wall of the abdominal cavity to provide a flexible blockage. Then, the position of the soft positioning ring 3 used in conjunction with the puncture cannula component 2 is adjusted so that the soft positioning ring 3 is pressed tightly against the patient's outer skin. In this way, the soft positioning ring 3 and the inflatable expansion blocking part 221 together clamp the patient's inner wall of the abdominal cavity. The edge of the inflatable expansion blocking part 221 can fill the gap between the abdominal cavity wall and the positioning cannula 22 after puncture, thereby improving the airtightness after puncture.

[0033] In summary, the trocar used in laparoscopic surgery can flexibly block the abdominal wall, effectively improving the airtightness of the trocar cannula when fixed to the patient's abdominal wall.

[0034] In this embodiment, the inflation blocking part 221 includes two fixing rings 2211 and an annular airbag 2212. The material of the annular airbag 2212 is silicone or polyurethane. The two fixing rings 2211 are respectively fixedly connected to the two ends of the annular airbag 2212. Both fixing rings 2211 are sealed and fixedly connected to the positioning sleeve 22. The inner side of the annular airbag 2212 is in communication with the positioning sleeve 22. The function of the two fixing rings 2211 is to tightly fix the two ends of the annular airbag 2212 to the positioning sleeve 22. When the external air pumping device inflates the positioning sleeve 22 with a preset amount of gas through the air connection 21, the annular airbag 2212 will expand under the action of air pressure to form an annular structure.

[0035] In this embodiment, one end of the positioning sleeve 22 is provided with an installation groove 222, and two fixing rings 2211 are fixedly connected in the installation groove 222. The function of the installation groove 222 is to provide an embedding space for the fixing rings 2211, so that after the fixing rings 2211 are installed, the outer surface of the fixing rings 2211 can be flush with the outer surface of the positioning sleeve 22.

[0036] In this embodiment, the positioning sleeve 22 is provided with a first ventilation guide groove 223, which is connected to the annular airbag 2212 and the ventilation connector 21. The first ventilation guide groove 223 has an annular structure in the positioning sleeve 22 and is used to guide air pressure to the annular airbag 2212, so that the annular airbag 2212 is inflated.

[0037] In this embodiment, a plurality of first support plates 2231 are provided in the first ventilation guide groove 223. The plurality of first support plates 2231 are evenly distributed around the first ventilation guide groove 223. Since the first ventilation guide groove 223 has a ring structure in the positioning sleeve 22, the positioning sleeve 22 has a hollow structure. In order to enhance the structural strength of the positioning sleeve 22, a plurality of first support plates 2231 are provided in the first ventilation guide groove 223 to reinforce the positioning sleeve 22.

[0038] In this embodiment, the ventilation connector 21 is provided with a second ventilation guide groove 211. The second ventilation guide groove 211 has an annular structure in the ventilation connector 21. The second ventilation guide groove 211 is connected to the first ventilation guide groove 223. When the external air pumping device inflates the positioning sleeve 22 through the ventilation connector 21, the air pressure flows through the second ventilation guide groove 211 to the first ventilation guide groove 223, causing the annular airbag 2212 to inflate.

[0039] In this embodiment, a plurality of second support plates 2111 are provided in the second ventilation guide groove 211. The plurality of second support plates 2111 are evenly distributed around the second ventilation guide groove 223. Since the second ventilation guide groove 211 has a ring structure in the ventilation connector 21, one end of the ventilation connector 21 also has a hollow structure. In order to avoid insufficient strength, a plurality of second support plates 2111 are provided in the second ventilation guide groove 211 for reinforcement.

[0040] In this embodiment, a first connecting nozzle 212 is provided on one side of the vent connector 21. The first connecting nozzle 212 is connected to the second vent guide groove 211. The first connecting nozzle 212 is used to connect to an external air pump device through a hose to pump air into the second vent guide groove 211. A second connecting nozzle 214 is also provided on one side of the vent connector 21. An insertion groove 215 is provided inside the vent connector 21. The second connecting nozzle 214 is connected to the insertion groove 215. A guide groove 225 is provided inside the positioning sleeve 22. The insertion slot 215 is connected to the guide slot 225. The puncture cone 1 passes through the insertion slot 215 and the guide slot 225 in sequence. After puncture, the puncture cone 1 is pulled out from the insertion slot 215 and the guide slot 225. Medical staff can then insert medical instruments into the patient's abdominal cavity through the insertion slot 215 and the guide slot 225 for examination or surgery. By sealing the insertion slot 215, medical staff can use an external air pump device connected to the second connecting nozzle 214 through a hose to inflate the patient's abdominal cavity.

[0041] In this embodiment, one end of the venting connector 21 is provided with a threaded connection end 213, which is arranged around the second venting guide groove 211. One end of the positioning sleeve 22 is provided with a threaded connection port 224, which forms a sealed and fixed connection with the threaded connection end 213. In order to ensure that the venting connector 21 can be stably fixedly connected with the positioning sleeve 22, the threaded connection end 213 and the threaded connection port 224 are threadedly connected. The threaded connection port 224 is connected to the first venting guide groove 223. After the threaded connection end 213 and the threaded connection port 224 are connected, the first venting guide groove 223 is connected to the venting connector 21.

[0042] In this embodiment, the inner wall of the threaded connection end 213 is provided with a support ring 2131. The support ring 2131 is housed in the second venting guide groove 211 and is tightly connected to the inner wall of the threaded connection end 213. Since the threaded connection end 213 is arranged around the second venting guide groove 211, in order to increase the structural strength of the threaded connection end 213 when it is threadedly connected to the threaded connection port 224, the support ring 2131 is provided to support the inner wall of the threaded connection end 213.

[0043] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A trocar for laparoscopic surgery, characterized in that, The device includes a puncture cone and a puncture cannula assembly. The puncture cone penetrates the puncture cannula assembly. The puncture cannula assembly includes a venting connector and a positioning cannula. One end of the positioning cannula is fixedly connected to and in communication with one end of the venting connector. The other end of the venting connector is detachably connected to the puncture cone. The other end of the positioning cannula is provided with an inflation and expansion blocking part, which is in communication with the positioning cannula.

2. The trocar for laparoscopic surgery according to claim 1, characterized in that, The inflatable expansion blocking part includes two fixing rings and an annular airbag component. The two fixing rings are respectively fixedly connected to both ends of the annular airbag component. Both fixing rings are sealed and fixedly connected to the positioning sleeve component. The inner side of the annular airbag component is in communication with the positioning sleeve component.

3. The trocar for laparoscopic surgery according to claim 2, characterized in that, One end of the positioning sleeve is provided with an installation groove, and both of the fixing rings are fixedly connected to the installation groove.

4. The trocar for laparoscopic surgery according to claim 2, characterized in that, The positioning sleeve is provided with a first ventilation guide groove, which is connected to the annular airbag and the ventilation connector.

5. The trocar for laparoscopic surgery according to claim 4, characterized in that, The first ventilation guide groove is provided with a plurality of first support plates, which are evenly distributed around the first ventilation guide groove in the circumference.

6. The trocar for laparoscopic surgery according to claim 4, characterized in that, The ventilation connector is provided with a second ventilation guide groove, which is connected to the first ventilation guide groove.

7. The trocar for laparoscopic surgery according to claim 6, characterized in that, The second ventilation guide groove is provided with a plurality of second support plates, which are evenly distributed around the second ventilation guide groove in a circumferential direction.

8. The trocar for laparoscopic surgery according to claim 6, characterized in that, The ventilation connector has a first connecting nozzle on one side, which is connected to the second ventilation guide groove.

9. The trocar for laparoscopic surgery according to claim 6, characterized in that, One end of the venting connector is provided with a threaded connection end, which is arranged around the second venting guide groove. One end of the positioning sleeve is provided with a threaded connection port, which forms a sealed and fixed connection with the threaded connection end.

10. The trocar for laparoscopic surgery according to claim 9, characterized in that, The inner wall of the threaded connection end is provided with a support ring, which is housed in the second venting groove and is tightly connected to the inner wall of the threaded connection end.

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