Drainage tube and drainage device

Abstract

The drainage tube comprises a tube body, the tube body is a flexible hollow pipeline, the front end of the tube body is open, the tail end of the tube body is closed, the tube body comprises a curled tube body at the tail end and a straight tube body at the front end, a plurality of drainage holes are formed in the curled tube body, and a sponge layer covers the curled tube body. The drainage device comprises a drainage tube and a guide wire. When the drainage tube is used, the curled tail end of the drainage tube is retained in the fistulous tract, firstly, the curled structure can increase the size of the tail end of the drainage tube, so that the curled tube body can be fixed in the fistulous tract, and the drainage tube is prevented from shifting or falling off; secondly, the contact area between the drainage tube body and the interior of the fistulous tract can be increased, the drainage effect of the drainage holes in the curled tube body can be achieved, and the drainage effect is better. And the sponge layer can stimulate the growth of the fistulous tract, promote the contraction of the fistulous tract and accelerate the healing of the fistulous tract, and also can effectively prevent the drainage holes in the tube body from being blocked, so that the drainage is smoother.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a drainage tube and a drainage device. Background Art

[0002] Among the many postoperative complications of gastrointestinal surgery, anastomotic fistula remains a major problem for clinicians. The incidence of fistula is related to the anatomical location of the anastomosis, ranging from 2% to 16% for the esophagus, stomach, pancreas, biliary tract, small intestine, colon, and rectum, with rates ranging from 1% to 9% for the esophagus, 1% to 16% for the stomach, 1% to 3% for the pancreas, 3% to 29% for the colon, and 8% to 41% for the rectum. Despite continuous advancements in surgical techniques and anastomotic instrumentation, the morbidity and mortality of postoperative anastomotic fistula remain high, with fistula-related mortality rates as high as 35%.

[0003] Currently, the most effective treatment for gastrointestinal anastomotic fistulas remains controversial, including reoperation, conservative management, and endoscopic minimally invasive therapy. Reoperation and conservative management inevitably lead to prolonged hospitalization, increased hospital costs, and increased mortality. Endoscopic minimally invasive therapy is a new treatment approach with numerous advantages, including safety, minimal invasiveness, rapid recovery, and low cost. Endoscopic drainage plays a crucial role, particularly for larger anastomotic fistulas and those associated with mediastinal, thoracic, and abdominal infections.

[0004] Currently, jejunal feeding tubes are used for endoscopic drainage of anastomotic fistulas. These tubes present several challenges: they are not specifically designed for anastomotic fistulas; their side drainage holes are unprotected and easily clogged; they are prone to displacement and require repositioning; their contact area is small, resulting in low drainage efficiency; and they only provide drainage without promoting fistula growth. Currently, there are no commercially available drainage tube devices specifically designed for endoscopic placement and treatment of anastomotic fistulas. Utility Model Content

[0005] In order to overcome at least one of the above technical problems of the prior art, the present invention provides a drainage tube and a drainage device that increase the contact area between the drainage tube and the inner wall of the fistula tract and accelerate the healing of the fistula tract.

[0006] A drainage tube is provided, comprising a tube body, which is a flexible hollow pipe with an opening at the front end and a closed end. The tube body comprises a curled tube body at the end and a straight tube body at the front end. Several drainage holes are provided on the curled tube body, and the outside of the curled tube body is covered with a sponge layer.

[0007] The aforementioned drainage tube has at least the following beneficial effects: During use, the curled end of the drainage tube remains within the fistula tract. First, the curled structure increases the volume of the tube end, securing the curled tube within the tract and preventing displacement or dislodging. Second, it increases the contact area between the tube and the tract, facilitating the drainage holes in the curled tube and improving drainage effectiveness. The sponge layer stimulates the growth of the fistula tract, promoting its reduction and accelerating its healing. It also effectively prevents clogging of the drainage holes in the tube, ensuring smoother drainage.

[0008] The curled tube can be actively or passively straightened. When the drainage tube is placed in the body, the curled tube becomes a straight tube, which facilitates the tube to pass through the body cavity into the fistula tract, making the operation more convenient and less damaging to the human cavity.

[0009] In some embodiments of the above-mentioned drainage tube, a length scale is provided outside the straight tube. By reading the scale, the length of the inserted drainage tube can be known, which is helpful for the doctor to judge the position of the end of the drainage tube, making the operation safer and more efficient.

[0010] In some embodiments of the aforementioned drainage tube, a marker is provided on the straight tube body, and the marker is located at the front end of the coiled tube body. When used in conjunction with an endoscope, observing the marker through the endoscope indicates that the coiled tube body is located at the fistula opening. At this point, the coiled tube body can be re-curled, facilitating determination of the coiled tube body's position and improving operational efficiency.

[0011] In some embodiments of the drainage tube, the marker is an X-ray opaque coating. Postoperative follow-up is performed using X-ray fluoroscopy. The position of the X-ray opaque marker can be used to determine whether the drainage tube has shifted, facilitating postoperative follow-up observation.

[0012] In some embodiments of the above-mentioned drainage tube, a detachable sealing cap is provided in the front end opening of the straight tube body, and a normally closed sealing hole is provided on the sealing cap. The sealing hole can be opened when subjected to external force, and injection or suction can be performed through the sealing hole, which plays a role of sealing and positioning.

[0013] In some embodiments of the above drainage tube, the sealing cap is fixed to the outside of the tube body by a flexible connecting belt. The sealing cap can be fixedly connected to the tube body to avoid loss, which is more convenient to use.

[0014] A drainage device is also provided, comprising a guide wire and any of the drainage tubes described above, wherein the guide wire is made of a hard material and after the guide wire is inserted into the tube body, the curled tube body is deformed into a straight state.

[0015] The above-mentioned drainage device has at least the following beneficial effects: the combination of the guide wire and the drainage tube guides and assists the drainage tube to be placed into the fistula opening, making the placement process faster and more convenient, reducing the damage of the drainage tube to the body cavity channel, and ensuring the safety of the patient.

[0016] In some embodiments of the above-mentioned drainage device, a fixing seat is provided at the front end of the guide wire, and the fixing seat can be detachably inserted into the front end opening of the straight tube body, so as to facilitate the fixation of the guide wire in the drainage tube and improve the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without making any creative efforts:

[0018] Figure 1 This is a schematic structural diagram of a drainage tube in a preferred embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of a drainage device according to a preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the use of a drainage device according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0023] Reference Figure 1 , provides a drainage tube, which includes a tube body 100. The tube body 100 is a flexible hollow tube. The front end of the tube body 100 is open, and the end of the tube body 100 is closed. The front end of the tube body 100 is located outside the body, and the end of the tube body extends into the fistula in the body. The front end opening of the tube body 100 can be connected to a negative pressure device, and the negative pressure device provides suction force to suck out the exudate or digestive fluid in the fistula.

[0024] The tube body 100 includes a curled tube body 120 at the end and a straight tube body 110 at the front end. The curled tube body 120 and the straight tube body 110 are connected front to back to form an integral structure. The curled tube body 120 is provided with a plurality of drainage holes 121. When in use, the curled tube body 120 of the drainage tube is retained in the fistula tract. First, the curled structure can increase the volume of the drainage tube end, so that the curled tube body 120 can be fixed in the fistula tract, preventing the drainage tube from shifting or falling off. Second, it can also increase the contact area between the tube body 100 and the interior of the fistula tract. The contact area between the drainage holes 121 and the interior of the fistula tract is also increased, which is conducive to the drainage function of the drainage holes 121 on the curled tube body 120, resulting in a better drainage effect.

[0025] The coiled tubular body 120 is further provided with a sponge layer 130, which is coated on the outside of the coiled tubular body 120. Under the elastic force of the coiled tubular body 120, the coiled tubular body 120 has a tendency to expand and expand outward due to its own elastic force. At this time, the sponge layer 130 coated on the outside of the coiled tubular body 120 can conform to the interior of the fistula tract and absorb digestive fluid and exudate within the fistula tract. The sponge layer 130 can stimulate the growth of the fistula tract, promote the shrinkage of the fistula tract, and accelerate the healing of the fistula tract. The sponge layer 130 can absorb liquid, prevent granulation tissue from growing and penetrating the drainage holes 121, or block the drainage holes 121 by the inner wall of the fistula tract during suction, effectively preventing the drainage holes 121 on the tubular body from becoming clogged and ensuring smoother drainage.

[0026] refer to Figure 1 and Figure 2 , Figure 1 The curled tube 120 is in a curled state. Figure 2 The curled tube body 120 is in a straightened state. The tube body 100 is made of a polymer material and has elasticity. When the curled tube body 120 is not subjected to external force or environmental changes, it is in a state of being curled or contracted, and the curled tube body 120 can be actively or passively transformed into a straightened state. Specifically, a side channel can be provided inside or outside the tube body 100, and the curled tube body 120 can be passively straightened by injecting liquid or gas into the side channel. Alternatively, a memory metal material can be provided on part of the curled tube body 100, and the curled tube body 120 can be actively straightened outside the body and actively curled inside the body through changes in the environment in which the tube body 100 is located. Or refer to Figure 3The curled tube 120 is passively straightened by auxiliary instruments. When the drainage tube is placed in the body, the curled tube 120 is deformed into a straight tube, making it easier for the tube 100 to pass through the body cavity and into the fistula tract. The operation process is more convenient, the damage to the human cavity is less, and the catheterization step is safer.

[0027] Figures 1 to 3 In the figure, the straight tube body 110 is further provided with a length scale 111. By reading the scale, the length of the drainage tube inserted can be known, which is helpful for the doctor to judge the position of the end of the drainage tube, making the operation safer and more efficient.

[0028] The straight tube 110 is provided with a marking 112, which is provided at the front end of the curled tube 120, between the curled tube 120 and the straight tube 110. The marking 112 can be provided by coating, pasting an image, or forming a logo integrally with the tube 100, etc. The marking 112 has a different color from the tube 100 to serve as a reminder. Figures 1 to 3 The mark 112 is set around the tube body 100 and is located about 1-2 cm from the front end of the sponge layer 130. When used in conjunction with an endoscope, the endoscopic camera is located at the fistula entrance. When the mark 112 is observed in the endoscope, it can be determined that part of the curled tube body 120 is already located in the fistula. At this time, the curled tube body 120 can be controlled to deform into a curled shape. The set mark 112 can determine the position of the curled tube body 120 when the curled tube body 120 is in a straight state, thereby improving the efficiency of the operation.

[0029] Furthermore, the mark 112 is set as an X-ray opaque mark graphic. When the postoperative follow-up is observed using X-ray fluoroscopy, the displacement of the drainage tube can be determined based on the position of the X-ray opaque mark 112, which facilitates postoperative follow-up observation.

[0030] In order to prevent the liquid in the tube body 100 from flowing out during the retention of the drainage tube, a detachable sealing cap 113 is further provided in the front opening of the straight tube body 110. The sealing cap 113 is fixed to the outside of the straight tube body 110 by a flexible connecting belt 114. The sealing cap 113 can be fixedly connected to the straight tube body 110, and the sealing cap 113 can also be prevented from being lost when it is removed, making it more convenient to use. The sealing cap 113 seals the front opening of the tube body 100 to prevent the liquid in the tube body 100 from flowing out and to prevent contaminants from entering the interior of the tube body 100. A normally closed sealing hole is provided on the sealing cap 113. The sealing hole can be opened when subjected to external force, and an injection needle can be inserted into the sealing hole for injection or suction. When the drainage tube is blocked or not smooth, physiological saline can be injected into the drainage tube through the sealing hole to clear the pipeline, thereby increasing the function and role of the drainage tube.

[0031] A drainage device is also provided, comprising a guidewire 200 and any of the aforementioned drainage tubes. The guidewire 200 is made of a hard material and, after being inserted into the tube body 100, the curled tube body 120 is deformed into a straightened state. The guidewire 200 is combined with the drainage tube to guide and assist in the placement of the drainage tube into the fistula opening, making the placement process faster and more convenient, reducing damage to the body cavity caused by the drainage tube, and ensuring patient safety.

[0032] In order to facilitate the connection between the guide wire 200 and the tube body 100, a fixing seat 210 is set at the front end of the guide wire 200. The fixing seat 210 can be detachably inserted into the front end opening of the straight tube body 110, so as to facilitate the fixation of the guide wire 200 in the drainage tube and improve the operation efficiency.

[0033] Figure 2 and Figure 3 The following is a schematic diagram of the drainage device during insertion and retention. The steps for using the drainage device are as follows:

[0034] 1: With the assistance of electronic gastroscope, insert the guide wire 200 into the drainage tube, and then insert the straightened drainage tube through the nasal cavity into the digestive tract until the tip of the drainage tube reaches the external opening of the fistula.

[0035] 2: With the assistance of electronic gastroscopy, use foreign body forceps to insert the drainage tube into the fistula tract until the radiopaque marker 112 is observed to be located at the external opening of the fistula tract. At this time, stop inserting the drainage tube.

[0036] 3: Under direct vision of the electronic gastroscope, withdraw the guide wire 200 in the drainage tube backward until the guide wire 200 is located at the position of the X-ray opaque mark 112.

[0037] 4: At this time, the drainage tube is left in place, and the electronic gastroscope and the guide wire 200 in the drainage tube are withdrawn synchronously, and the drainage tube is prevented from shifting during the withdrawal process until the electronic gastroscope is withdrawn from the oral cavity.

[0038] 5: Record the scale of the nasal drainage tube, fix it externally, and connect the front opening of the drainage tube to the negative pressure suction device 300 for suction.

[0039] 6: When the drainage tube is blocked or not unobstructed, remove the negative pressure suction device 300 and install the sealing cap 113, and inject physiological saline into the drainage tube through the sealing hole to clear the tube.

[0040] The above is a specific description of the preferred embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, technical personnel familiar with the field can also make various equivalent modifications or replacements without violating the spirit of the present invention. Other embodiments that can be obtained all fall within the scope of protection of the present invention.

Claims

1. A drainage tube, characterized in that: include The tube body (100) is a flexible hollow tube, the front end of the tube body (100) is open, and the end of the tube body (100) is closed. The tube body (100) includes a curled tube body (120) at the end and a straight tube body (110) at the front end. The curled tube body (120) is provided with a plurality of drainage holes (121). The curled tube body (120) is covered with a sponge layer (130).

2. The drainage tube according to claim 1, characterized in that: The curled tube (120) can be transformed into a straightened state actively or passively.

3. The drainage tube according to claim 1, wherein: A length scale (111) is provided outside the straight tube body (110).

4. The drainage tube according to claim 1, wherein: The straight tube body (110) is provided with a mark (112), and the mark (112) is provided at the front end of the curled tube body (120).

5. The drainage tube according to claim 4, characterized in that: The marker (112) is an X-ray opaque marker image.

6. The drainage tube according to claim 1, characterized in that: A detachable sealing cap (113) is provided in the front end opening of the straight tube body (110), and a normally closed sealing hole is provided on the sealing cap (113), and the sealing hole can be opened when subjected to external force.

7. The drainage tube according to claim 6, characterized in that: The sealing cap (113) is fixed to the outside of the straight tube body (110) via a flexible connecting belt (114).

8. A drainage device, characterized in that: The invention comprises a guide wire (200) and a drainage tube according to any one of the above claims, wherein the guide wire (200) is made of a hard material, and after the guide wire (200) is inserted into the tube body (100), the curled tube body (120) is deformed into a straight state.

9. The drainage device according to claim 8, characterized in that: A fixing seat (210) is provided at the front end of the guide wire (200), and the fixing seat (210) is detachably inserted into the front end opening of the straight tube body (110).

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