Intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer

Abstract

An intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer comprises a cylindrical support body that can be inserted into the esophageal cavity to support the anastomotic site, a drainage tube, an upper blocking diaphragm, and a lower blocking diaphragm. The cylindrical support body is made of a biocompatible absorbent foam material. The upper blocking diaphragm and the lower blocking diaphragm work together to achieve gas-liquid sealing at both ends of the cylindrical support body, and the second end is connected to a drainage bottle and a negative pressure source. The present invention has the following advantages: 1. It can greatly improve the cure rate of anastomotic fistula, promote the healing of anastomotic wounds, and the success rate of treating anastomotic fistula is above 80%. 2. The device can be inserted into esophageal cancer surgery to reduce the incidence of anastomotic fistula of esophageal cancer. 3. The device has a simple structure and is easy to insert into the surgery.

Description

Technical Field

[0001] The invention relates to a device for promoting the healing of anastomotic sites after esophageal cancer surgery, in particular to an intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer. Background Art

[0002] Anastomotic fistula of esophageal cancer is a common and serious complication after esophageal cancer surgery, with an incidence of 8.2-15%, which leads to prolonged hospitalization, increased hospitalization costs, and increased mortality. There are limited technical means for the prevention and treatment of anastomotic fistula. Local erosion of digestive fluid is one of the important causes of anastomotic fistula.

[0003] In order to promote wound healing, there is a negative pressure closed drainage technology in the prior art. This technology uses a polyethylene alcohol hydrated seaweed salt foam dressing with a drainage tube to cover or fill the wound of skin and soft tissue defects, and uses a biological semipermeable membrane to seal it into a closed space. The drainage tube is connected to a negative pressure source, and the controllable negative pressure is used to achieve the effect of timely expelling secretions and promoting wound healing. Based on the idea of ​​the above conventional negative pressure closed drainage, the industry needs an intracavitary negative pressure drainage treatment device that can be used to prevent and treat esophageal cancer anastomotic fistula. There is no report in the current literature, and there is no product that meets this function on the market. Summary of the invention

[0004] The problem to be solved by the present invention is to provide an intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer.

[0005] The present invention adopts the following technical scheme: it includes a cylindrical support body that can be inserted into the esophageal cavity to support the anastomotic site, a drainage tube, an upper blocking membrane, and a lower blocking membrane. The cylindrical support body is made of a biocompatible absorbent foam material, the cylindrical support body is provided with an axial socket, the drainage tube is provided with a first end and a second end, the first end matches the socket, a tube wall of the insertion portion of the first end is provided with a plurality of side holes, the upper blocking membrane is provided with a membrane hole for the drainage tube to pass through, the membrane hole and the junction of the drainage tube are matched for air-liquid sealing, the upper blocking membrane is provided at the upper end of the cylindrical support body, and the lower blocking membrane is provided at the lower end of the cylindrical support body, the upper blocking membrane and the lower blocking membrane work together to achieve air-liquid sealing at both ends of the cylindrical support body, and the second end is connected to the drainage bottle and the negative pressure source.

[0006] The principle is: after the esophageal cancer surgery is completed, the cylindrical support body can be inserted and positioned in the anastomosis part of the esophagus through the nasal cavity or oral cavity through tools. The cylindrical support body of the device is connected to the esophageal cavity tissue wall at the anastomosis part. Since the two ends of the cylindrical support body are provided with blocking membranes (upper blocking membrane and lower blocking membrane), the liquid sealing structure formed at the two ends can act as a barrier to achieve liquid sealing of the anastomosis part. At the same time, since the foam material has the function of absorbing and storing liquid, a small amount of digestive fluid that penetrates into the anastomosis part will be sucked into the cylindrical support body. Since the drainage tube is connected to a negative pressure source, the esophageal lumen around the anastomosis part supported by the cylindrical support body can maintain a negative pressure state, and the insertion end of the drainage tube can continuously absorb and collect the digestive fluid that penetrates into the foam material through multiple side holes, and finally introduce the drainage tube into the drainage bottle for discharge. In this way, the digestive fluid can be prevented from leaking and eroding the anastomosis part, which is conducive to promoting tissue healing of the anastomosis part and reducing the probability of infection of the anastomosis part leading to anastomotic fistula. The device can be inserted at two times: one is during esophageal cancer surgery, when insertion can effectively prevent the occurrence of anastomotic leakage; the other is after surgery when anastomotic leakage occurs, when insertion can promote wound healing and achieve the effect of treating anastomotic leakage. The insertion method can be positioned by gastroscope and inserted under visualization. The device can maintain continuous suction, and the area around the anastomosis can be kept dry, thereby achieving the function of promoting wound healing. The connection structure between the occluding membrane (upper occluding membrane and lower occluding membrane) and the cylindrical support body can be fixed in the form of bonding.

[0007] One improvement is that the biocompatible water-absorbent foam material is a polyvinyl alcohol hydrated seaweed salt foam material. The polyvinyl alcohol hydrated seaweed salt foam material has excellent plasticity, water permeability and good tissue compatibility, which is conducive to the absorption and storage of digestive fluid, wound healing and the realization of negative pressure suction function.

[0008] Another improvement is that the upper blocking membrane is made of expanded polytetrafluoroethylene material, and the lower blocking membrane is made of expanded polytetrafluoroethylene material. Expanded polytetrafluoroethylene (PTFE) material is fluid-impermeable and flexible and biocompatible, which can facilitate cell growth and promote healing at the anastomosis site.

[0009] Another improvement is that the drainage tube is provided with a length scale, which is helpful for controlling the insertion depth of the cylindrical support body during insertion and positioning it at a suitable position.

[0010] A further improvement is that the tip of the first end is provided with a radially extending baffle, which has the function of stabilizing the connection structure between the drainage tube and the cylindrical support body to prevent it from falling off.

[0011] The present invention has the following advantages:

[0012] 1. It can greatly improve the cure rate of anastomotic fistula. After anastomotic fistula occurs, the device can maintain continuous suction, reduce the erosion of the anastomotic stoma by digestive fluid, and effectively promote the healing of the anastomotic stoma. The success rate of treating anastomotic fistula is over 80%.

[0013] 2. This device is inserted during esophageal cancer surgery, which can reduce the incidence of anastomotic fistula in esophageal cancer by reducing the erosion of the anastomotic stoma by digestive fluid.

[0014] 3. The device has a simple structure and is easy to operate during implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0016] Figure 2 It is a partial cross-sectional structural schematic diagram of an embodiment of the present invention.

[0017] Figure 3 It is a schematic structural diagram of an upper blocking membrane according to an embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the cylindrical support structure of an embodiment of the present invention.

[0019] Figure 5 It is a schematic structural diagram of a second embodiment of the first end of the drainage tube of the present invention.

[0020] Figure 6 is with Figure 5 Schematic diagram of the cylindrical support structure matching the illustrated embodiment.

[0021] In the figure: a cylindrical support body 1, a drainage tube 2, an upper blocking membrane 3, a lower blocking membrane 4, a plug hole 5, a first end 6, a second end 7, a side hole 8, a membrane hole 9, a baffle 10, and a length scale 11. DETAILED DESCRIPTION

[0022] like Figures 1 to 6 As shown, an embodiment of the present invention includes a cylindrical support body 1 that can be inserted into the esophageal cavity to support the anastomosis site, a drainage tube 2, an upper blocking membrane 3, and a lower blocking membrane 4. The cylindrical support body 1 is made of a biocompatible absorbent foam material, and the cylindrical support body 1 is provided with an axial socket 5. The drainage tube 2 is provided with a first end 6 and a second end 7. The first end 6 matches the socket 5, and a plurality of side holes 8 are provided on the tube wall of the insertion portion of the first end 6. The upper blocking membrane 3 is provided with a membrane hole 9 for the drainage tube 2 to pass through, and the membrane hole 9 and the junction of the drainage tube 2 are matched for air-liquid sealing. The upper blocking membrane 3 is arranged at the upper end of the cylindrical support body 1, and the lower blocking membrane 4 is arranged at the lower end of the cylindrical support body 1. The upper blocking membrane 3 and the lower blocking membrane 4 work together to achieve air-liquid sealing at both ends of the cylindrical support body 1, and the second end 7 is connected to the drainage bottle and the negative pressure source.

[0023] The principle is: after the esophageal cancer surgery is completed, the cylindrical support 1 can be inserted and positioned in the anastomotic part of the esophagus through the nasal cavity or oral cavity by tools. The cylindrical support 1 of the device is connected to the esophageal cavity tissue wall at the anastomotic part. Since the two ends of the cylindrical support 1 are provided with blocking membranes (upper blocking membrane 3 and lower blocking membrane 4), the liquid sealing structure formed at the two ends can act as a barrier to achieve liquid sealing of the anastomotic part. At the same time, since the foam material has the function of absorbing and storing liquid, a small amount of digestive fluid that penetrates into the anastomotic part will be sucked into the cylindrical support 1. Since the drainage tube 2 is connected to a negative pressure source, the esophageal lumen around the anastomotic part supported by the cylindrical support 1 can maintain a negative pressure state, and the insertion end of the drainage tube 2 can continuously absorb and collect the digestive fluid that penetrates into the foam material through multiple side holes 8, and finally introduce it into the drainage bottle through the drainage tube 2 for discharge. In this way, the digestive fluid can be prevented from leaking and eroding the anastomotic part, which is conducive to promoting tissue healing of the anastomotic part and reducing the probability of infection of the anastomotic part leading to anastomotic fistula. The device can be inserted at two times: one is during esophageal cancer surgery, when insertion can effectively prevent the occurrence of anastomotic leakage; the other is after surgery when anastomotic leakage occurs, when insertion can promote wound healing and achieve the effect of treating anastomotic leakage. The insertion method can be positioned by gastroscope and inserted under visualization. The device can maintain continuous suction, and the area around the anastomosis can be kept dry, thereby achieving the function of promoting wound healing. The connection structure between the blocking membrane (upper blocking membrane 3 and lower blocking membrane 4) and the cylindrical support body 1 can be fixed in the form of bonding.

[0024] One improvement is that the biocompatible water-absorbent foam material is a polyvinyl alcohol hydrated seaweed salt foam material. The polyvinyl alcohol hydrated seaweed salt foam material has excellent plasticity, water permeability and good tissue compatibility, which is conducive to the absorption and storage of digestive fluid, wound healing and the realization of negative pressure suction function.

[0025] like Figure 1 and Figure 2 As shown, another improvement is that the upper blocking membrane 3 is made of expanded polytetrafluoroethylene material, and the lower blocking membrane 4 is made of expanded polytetrafluoroethylene material. Expanded polytetrafluoroethylene (PTFE) material is fluid-impermeable and flexible and biocompatible, which can facilitate cell growth and promote healing at the anastomosis.

[0026] like Figure 1 As shown, another improvement is that the drainage tube 2 is provided with a length scale 11. The length scale 11 is provided to help control the insertion depth of the cylindrical support body 1 during insertion and position it at a suitable position.

[0027] like Figure 5 As shown, a further improvement is that the end of the first end 6 is provided with a radially extending baffle 10. Figure 6The cylindrical support body 1 is matched with the first end 6 provided with a baffle 10. The baffle 10 has the function of stabilizing the connection structure between the drainage tube and the cylindrical support body to prevent it from falling off.

[0028] The present invention is not limited to the specific structures of the above embodiments, and equivalent transformations of other similar structures all fall within the protection scope of the present invention.

Claims

1. An intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer, characterized in that It includes a cylindrical support body that can be inserted into the esophageal cavity to support the anastomotic site, a drainage tube, an upper blocking membrane, and a lower blocking membrane. The cylindrical support body is made of biocompatible absorbent foam material, the cylindrical support body is provided with an axial socket, the drainage tube is provided with a first end and a second end, the first end matches the socket, a plurality of side holes are provided on the tube wall of the insertion portion of the first end, the upper blocking membrane is provided with a membrane hole for the drainage tube to pass through, the membrane hole and the junction of the drainage tube are matched for gas-liquid sealing, the upper blocking membrane is arranged at the upper end of the cylindrical support body, and the lower blocking membrane is arranged at the lower end of the cylindrical support body, the upper blocking membrane and the lower blocking membrane work together to achieve gas-liquid sealing at both ends of the cylindrical support body, the second end is connected to the drainage bottle and the negative pressure source, the upper blocking membrane is made of expanded polytetrafluoroethylene material, and the lower blocking membrane is made of expanded polytetrafluoroethylene material.

2. The intracavitary negative pressure drainage treatment device for preventing and treating anastomotic leakage of esophageal cancer according to claim 1, characterized in that: The biocompatible water-absorbent foam material is a polyvinyl alcohol hydrated algae salt foam material.

3. The intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer according to claim 2, characterized in that: The drainage tube is provided with a length scale.

4. The intracavitary negative pressure drainage treatment device for preventing and treating anastomotic fistula of esophageal cancer according to claim 3, characterized in that: The tip of the first end is provided with a radially extending blocking piece.

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