Intracavity negative pressure device for treating upper digestive tract fistula

Abstract

The utility model discloses an intracavity negative pressure device for treating upper digestive tract fistula, which comprises a drainage catheter, and two ends of the drainage catheter are respectively a suction end and a negative pressure end connected with the negative pressure device; a liquid suction hole adjacent to the suction end is formed in the side wall of the drainage catheter, and a sponge body wrapping the liquid suction hole is arranged on the outer wall of the drainage catheter. The sponge body comprises a first sponge body and a second sponge body with the aperture larger than that of the first sponge body, the first sponge body wraps the suction end, and the second sponge body is arranged between the first sponge body and the negative pressure end. The two cavernous bodies with different pore diameters are arranged in a partitioned mode, the first cavernous body with the small pore diameter absorbs effusion at the wound of the upper digestive tract fistula in time, granulation tissue hyperplasia is promoted, recovery of a patient is facilitated, and the treatment period is shortened; the second sponge body with the large hole diameter enables secretions with large viscidity to be adsorbed in time, the sponge body and the drainage catheter are not prone to being blocked, the service life of the negative pressure device is prolonged, and the replacement frequency of the device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an intracavitary negative pressure device for treating upper gastrointestinal fistulas. Background Art

[0002] Esophageal cancer and gastric cancer are high-incidence tumors of the digestive tract, seriously threatening human health. After surgical resection of tumors, digestive tract reconstruction is required. However, due to limitations in anastomosis technical conditions and poor basic physical conditions of patients themselves, serious complications may occur after abdominal surgery, such as anastomotic fistulas after digestive tract reconstruction, leading to infections in surgical sites, chest cavities, abdominal cavities, mediastinum and other parts. Poor control of infection can cause systemic inflammatory response syndrome, shock, and even death.

[0003] Currently, for anastomotic fistulas, an intracavitary vacuum (EVAC) technique has been proposed. This technique inserts a vacuum device with negative pressure into the natural cavity, such as the oral cavity, to control the spread of contamination through the perforation and does not affect the secondary healing of ulcers or anastomotic fistulas, with less trauma than traditional repair methods. However, the existing intracavitary negative pressure assisted closure (EVAC) device has the following defects: First, when treating upper gastrointestinal fistulas, the polyurethane sponge placed in the digestive tract cavity is easily blocked by mucus and necrotic tissues, etc. Especially, viscous secretions such as pharyngeal sputum flowing through the upper digestive tract are more likely to cause blockage, resulting in a short device replacement cycle. Second, drainage is not timely, prone to infection, the treatment and recovery cycle is long, and the healing speed of fistula tissues is slow. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide an intracavitary negative pressure device for treating upper gastrointestinal fistulas, which greatly reduces the situation that the drainage catheter is easily blocked, reduces the replacement frequency of the negative pressure device, timely sucks out the effusion, promotes the proliferation of granulation tissue, and shortens the treatment cycle.

[0005] To achieve the above technical effects, the technical solution of the utility model is: an intracavitary negative pressure device for treating upper gastrointestinal fistulas, including a drainage catheter, both ends of the drainage catheter are respectively a suction end and a negative pressure end connected to a negative pressure device; a liquid suction hole adjacent to the suction end is arranged on the side wall of the drainage catheter, and a sponge body wrapping the liquid suction hole is arranged on the outer wall of the drainage catheter; the sponge body includes a first sponge body and a second sponge body with a pore size larger than that of the first sponge body, the first sponge body covers the suction end, and the second sponge body is arranged between the first sponge body and the negative pressure end.

[0006] The preferred technical solution is that a first flushing tube is inserted into the drainage catheter, the first flushing tube includes a first liquid inlet end and a first liquid outlet end, the first liquid inlet end is arranged at the negative pressure end, and the first liquid outlet end is arranged on the side of the second sponge body away from the first sponge body.

[0007] Preferably, a second flushing tube is inserted into the drainage catheter. The second flushing tube includes a second liquid inlet end and a second liquid outlet end. The second liquid inlet end is arranged at the negative pressure end, and the second liquid outlet end is coated and arranged inside the first sponge body. The port of the second liquid outlet end is recessed or flush with the surface of the first sponge body.

[0008] Preferably, the pore diameter of the first sponge body is 400 - 600 μm.

[0009] Preferably, the pore diameter of the second sponge body is 600 - 800 μm.

[0010] Preferably, the liquid suction holes include a first liquid suction hole and a second liquid suction hole, and the first liquid suction hole and the second liquid suction hole are arranged in a staggered manner on opposite sides along the axial direction of the drainage catheter.

[0011] Preferably, the pore diameters of the liquid suction holes are different.

[0012] Preferably, the first liquid inlet end and / or the second liquid inlet end are connected to a flushing liquid supply device.

[0013] Preferably, a stop clamp is arranged at the first liquid inlet end and / or the second liquid inlet end.

[0014] The advantages and beneficial effects of the present utility model are as follows: By partitioning and arranging two sponge bodies with different pore diameters, the first sponge body with a small pore diameter is arranged at the upper gastrointestinal fistula wound to timely suck out the accumulated liquid at the upper gastrointestinal fistula wound, promote the proliferation of granulation tissue, and thus is beneficial to the patient's recovery and shortens the treatment cycle; the second sponge body with a large pore diameter is arranged below the esophagus, so that when the oropharyngeal secretions flow through the upper gastrointestinal tract, they first pass through the second sponge body with a large pore diameter, so that the viscous secretions can be adsorbed in time, and the sponge body and the drainage catheter are not easily blocked, the service life of the negative pressure device is prolonged, and the frequency of device replacement is reduced.

[0015] By arranging the second sponge body with a large pore diameter between the first sponge body with a small pore diameter and the drainage catheter, when the first sponge body with a small pore diameter below is blocked and the accumulated liquid reaches the position of the second sponge body, the second sponge body serves as a second line of defense to suck out the excessive liquid and prevent the liquid from flowing back to the oropharynx and being aspirated by mistake. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the intracavitary negative pressure device for treating upper gastrointestinal fistula in the embodiment;

[0017] Figure 2 is Figure 1 a schematic structural view of the drainage catheter of

[0018] Figure 3 It is another schematic structural diagram of the intracavitary negative pressure device for treating upper gastrointestinal fistula in the embodiment;

[0019] Figure 4 is Figure 3 the sectional view of;

[0020] Figure 5 is Figure 4 the enlarged schematic view of part A in

[0021] In the figure: 1. Drainage catheter; 11. Suction end; 12. Negative pressure end; 13. Liquid suction hole; 131. First liquid suction hole; 132. Second liquid suction hole; 2. First sponge body; 21. Surface; 3. Second sponge body; 4. First liquid flushing tube; 41. First liquid inlet end; 42. First liquid outlet end; 5. Second liquid flushing tube; 51. Second liquid inlet end; 52. Second liquid outlet end; 521. Port; 6. Stop clamp. Specific embodiments

[0022] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0023] In the description of the present invention, it should be noted that unless otherwise stated, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Such as Figures 1-5As shown in the figure, an intracavitary negative pressure device for treating upper gastrointestinal fistula in an embodiment includes a drainage catheter 1. The two ends of the drainage catheter 1 are respectively a suction end 11 and a negative pressure end 12 connected to a negative pressure device. A liquid suction hole 13 adjacent to the suction end 11 is provided on the side wall of the drainage catheter 1, and a sponge body covering the liquid suction hole 13 is provided on the outer wall of the drainage catheter 1. The sponge body includes a first sponge body 2 and a second sponge body 3 with a pore diameter larger than that of the first sponge body 2. The first sponge body 2 covers the suction end 11, and the second sponge body 3 is arranged between the first sponge body 2 and the negative pressure end 12.

[0026] When the intracavitary negative pressure device for treating upper gastrointestinal fistula in this embodiment is in use, the drainage catheter 1 is inserted from the nasal cavity position and inserted into the stomach along the esophagus. Since the first sponge body 2 covers the suction end 11 of the drainage catheter 1 and the second sponge body 3 is arranged between the first sponge body 2 and the negative pressure end 12 of the drainage tube; after the intracavitary negative pressure device is inserted into the patient's body, the first sponge body 2 outside the drainage catheter 1 is located below the second sponge body 3. Specifically, the first sponge body 2 with a small pore diameter is inserted into the position of the upper gastrointestinal fistula wound, and the second sponge body 3 with a large pore diameter is inserted below the esophagus.

[0027] As Figures 1-5 shown in the figure, in this embodiment, the pore diameter of the first sponge body 2 is 400 - 600 μm; the pore diameter of the second sponge body 3 is 600 - 800 μm.

[0028] In this embodiment, the first sponge body 2 with a small pore diameter is set and placed at the upper gastrointestinal fistula wound. Cooperating with the liquid suction hole 13 and the drainage catheter 1 of the negative pressure end 12 connected to the negative pressure device, it can timely suck out the accumulated fluid at the upper gastrointestinal fistula wound, reduce the occurrence of inflammation, promote the proliferation of granulation tissue, and thus is beneficial to the patient's recovery and shortens the treatment cycle.

[0029] Since when dealing with upper gastrointestinal fistula, the oropharyngeal secretions flow through the upper gastrointestinal tract. Specifically, the secretions flow from the esophagus to the upper gastrointestinal fistula opening from top to bottom, which is likely to cause the polyurethane sponge implanted in the upper gastrointestinal cavity to be blocked by mucus wrapping. In this embodiment, the second sponge body 3 with a large pore diameter is set and placed above the upper gastrointestinal fistula wound below the esophagus, so that the oropharyngeal secretions can be timely adsorbed by the large pore sponge when flowing through the upper gastrointestinal tract. The sponge body and the drainage catheter 1 are not easily blocked, the service life of the negative pressure device is prolonged, the frequency of device replacement is reduced, and thus the pain of the patient when inserting the drainage catheter 1 and the burden on the nursing staff are reduced, and the treatment cost is reduced.

[0030] In this embodiment, two sponges with different pore sizes are arranged in zones, and the second sponge 3 with a large pore size is arranged between the first sponge 2 with a small pore size and the drainage catheter 1. On the one hand, the secretions in the oropharyngeal part flow along the esophagus through the second sponge 3 first and then to the first sponge 2. The secretions with higher viscosity will be preferentially adsorbed by the second sponge 3 with a larger pore size, reducing the risk of sponge blockage. On the other hand, when the first sponge 2 with a small pore size below is blocked and the liquid accumulates to the position of the second sponge 3, the second sponge 3 serves as a second line of defense. On the one hand, it sucks up the excessive liquid to prevent the liquid from flowing back to the oropharynx and being aspirated by mistake. On the other hand, it replaces the first sponge to continue the work of sucking up the accumulated liquid at the upper gastrointestinal fistula wound, prolonging the service life of the negative pressure device, reducing the frequency of device replacement, and lowering the treatment cost.

[0031] Preferably, the first sponge 2 and the second sponge 3 are circular columnar.

[0032] In this embodiment, the first sponge 2 and the second sponge 3 can also be selected in other shapes, only need to ensure that the first sponge 2 covers the end face opening of the suction end 11 and part of the liquid suction holes 13, and the second sponge 3 covers the other part of the liquid suction holes 13.

[0033] Furthermore, since the positions of the upper gastrointestinal fistulas of each patient are not fixed during clinical practice, the first sponge 2 and the second sponge 3 are arranged in a fitting manner or with a gap.

[0034] Such as Figures 1-5 As shown, in another preferred embodiment, a first flushing tube 4 is inserted into the drainage catheter 1. The first flushing tube 4 includes a first liquid inlet end 41 and a first liquid outlet end 42. The first liquid inlet end 41 is arranged at the negative pressure end 12, and the first liquid outlet end 42 is arranged on the side of the second sponge 3 away from the first sponge 2.

[0035] The first flushing tube 4 is inserted into the drainage catheter 1 from the negative pressure end 12 of the drainage catheter 1. After the drainage catheter 1 is placed in the esophagus, the first liquid outlet end 42 of the first flushing tube 4 extends out from the side wall of the drainage catheter 1 above the second sponge 3. When the first flushing tube 4 flushes with liquid, the liquid flows out from the first liquid outlet end 42, flushing the second sponge 3, and at the same time diluting waste such as mucus, which is beneficial for the negative pressure device to suck and collect the waste liquid, prolonging the service life of the negative pressure device and facilitating the healing and recovery of the patient's fistula. Furthermore, the first flushing tube 4 flushes intermittently, and when the patient feels mucus and swallows, the first flushing tube 4 works.

[0036] Further, the maximum distance between the opening of the first liquid outlet end 42 and the outer wall of the drainage catheter 1 is less than or equal to the minimum distance between the outer wall of the second sponge body 3 and the outer wall of the drainage catheter 1; specifically, the first liquid outlet end 42 is not set to protrude from the second sponge body 3, reducing the situation of damaging the esophagus due to friction with the esophagus when the drainage catheter 1 is inserted into and withdrawn from the esophagus, and reducing the difficulty of withdrawing and inserting the drainage catheter 1.

[0037] Optionally, the opening of the first liquid outlet end 42 is arranged facing away from the side wall of the drainage catheter 1 or towards the surface of the second sponge body 3.

[0038] Preferably, when the second sponge body 3 is in a circular column shape, the distance between the opening of the first liquid outlet end 42 and the outer wall of the drainage catheter 1 is less than or equal to the distance between the outer wall of the second sponge body 3 and the outer wall of the drainage catheter 1; at this time, the distance between the outer wall of the second sponge body 3 and the outer wall of the drainage catheter 1 is the same, which is the wall thickness of the second sponge body 3.

[0039] As Figures 1-5 shown, in another preferred embodiment, a second flushing tube 5 is inserted into the drainage catheter 1. The second flushing tube 5 includes a second liquid inlet end 51 and a second liquid outlet end 52. The second liquid inlet end 51 is arranged at the negative pressure end 12, and the second liquid outlet end 52 is wrapped and arranged inside the first sponge body 2. The port 521 of the second liquid outlet end 52 is recessed or flush with the surface 21 of the first sponge body 2.

[0040] Optionally, the second liquid outlet end 52 of the second flushing tube 5 passes through the end face opening of the suction end 11 of the drainage catheter 1 and then extends and penetrates towards any surface 21 of the first sponge body 2; or the second liquid outlet end 52 passes through the side wall of the drainage catheter 1 and then extends and penetrates towards any surface 21 of the first sponge body 2.

[0041] The second flushing tube 5 is wrapped inside the first sponge body 2, and the port 521 of the second liquid outlet end 52 is recessed or flush with the surface 21 of the first sponge body 2. Compared with the second liquid outlet end 52 of the second flushing tube 5 protruding from the first sponge body 2, it is more convenient to insert and withdraw the drainage catheter 1 and is not likely to cause trauma to the inner wall of the esophagus.

[0042] The second flushing tube 5 injects liquid to flush the first sponge body 2. After the flushing liquid flows out from the first sponge body 2, the liquid after flushing is sucked out by the negative pressure device, timely discharging mucus and necrotic tissue, ensuring the cleanliness of the upper gastrointestinal fistula wound and facilitating the healing of the patient's wound.

[0043] Preferably, the port 521 of the second liquid outlet end 52 is flush with the surface 21 of the first sponge body 2; on the one hand, the flushing liquid flowing out from the second liquid outlet end 52 flushes the surface of the first sponge body 2, and on the other hand, it flushes the upper gastrointestinal fistula, diluting the mucus and necrotic tissue at the fistula to make it easy to be adsorbed by the negative pressure device.

[0044] By arranging the first flushing tube 4 and the second flushing tube 5 to flush the corpus cavernosum, the mucus and necrotic tissues and other waste liquid are diluted, which is convenient for the negative pressure device to suck out, and the occurrence of corpus cavernosum blockage is reduced.

[0045] As Figures 1-5 shown, in another preferred embodiment, the liquid suction holes 13 include a first liquid suction hole 131 and a second liquid suction hole 132, and the first liquid suction hole 131 and the second liquid suction hole 132 are arranged in a staggered manner on opposite sides along the axis of the drainage catheter 1.

[0046] As Figures 1-5 shown, in another preferred embodiment, the apertures of the liquid suction holes 13 are different.

[0047] In this embodiment, the first liquid suction hole 131 and the second liquid suction hole 132 on opposite sides of the drainage catheter 1 are arranged in a staggered manner. Compared with the case where the liquid suction holes 13 on both sides are arranged opposite to each other, when negative pressure suction is performed, it is not easy to cause the drainage catheter 1 to form a convection, thereby affecting the efficiency of negative pressure suction, and at the same time, it is not easy to cause the drainage catheter 1 to deform.

[0048] By setting different apertures for the liquid suction holes 13, the large-aperture liquid suction holes 13 are beneficial to sucking out mucus and necrotic tissues; the small-aperture liquid suction holes 13 increase the negative pressure suction holes while effectively ensuring the strength of the pipeline. If all the liquid suction holes 13 are set as small holes, they are easy to be blocked; if all are set as large holes, it is easy for the main body of the diversion tube to break, and the supportability of the pipeline bracket is poor.

[0049] As Figures 1-5 shown, in another preferred embodiment, the first liquid inlet end 41 and / or the second liquid inlet end 51 are connected to a flushing liquid supply device.

[0050] Optionally, the flushing liquid is clear water or physiological saline.

[0051] In this embodiment, by flushing in physiological saline, while taking away mucus and necrotic tissues, it locally inhibits bacteria and promotes wound healing, shortening the treatment cycle of the patient.

[0052] As Figures 1-5 shown, in another preferred embodiment, a stop clamp 6 is provided at the first liquid inlet end 41 and / or the second liquid inlet end 51.

[0053] In this embodiment, by providing the stop clamp 6, the liquid inlet volume of the first flushing tube 4 and the second flushing tube 5 is controlled, and thus the flushing speed is adjusted.

[0054] The main steps of using the intracavitary negative pressure device of this embodiment are as follows:

[0055] Step 1: Insert the drainage catheter 1 through the patient's nasal cavity, and control the first sponge body 2 of the drainage catheter 1 to be at the upper gastrointestinal fistula wound, and the second sponge body 3 to be at the position below the esophagus.

[0056] Step 2: Adjust the patient's posture and elevate the patient's head; intermittently open the stop clamp 6 on the first flushing tube 4 for flushing as needed, keep the stop clamp 6 on the second flushing tube 5 open for continuous flushing, and introduce the flushing liquid to flush the second sponge body 3 and the first sponge body 2 respectively.

[0057] Step 3: Turn on the negative pressure device and timely suck out and collect mucus and necrotic tissues.

[0058] When it is necessary to replace the intracavitary negative pressure device, take out the intracavitary negative pressure device including the drainage catheter 1 and the sponge body. Generally, it is replaced once every 3 to 4 days. Repeat the operations of steps 1 to 3 in sequence until the fistula tissue recovers. After the patient recovers, take out the intracavitary negative pressure device.

[0059] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An intracavitary negative pressure device for treating upper gastrointestinal fistulas, comprising a drainage catheter (1), with both ends of the drainage catheter (1) being a suction end (11) and a negative pressure end (12) connected to a negative pressure device respectively; a liquid suction hole (13) adjacent to the suction end (11) is arranged on the side wall of the drainage catheter (1), and a sponge body wrapping the liquid suction hole (13) is arranged on the outer wall of the drainage catheter (1); it is characterized in that, The sponge body includes a first sponge body (2) and a second sponge body (3) with a pore diameter larger than that of the first sponge body (2). The first sponge body (2) covers the suction end (11), and the second sponge body (3) is arranged between the first sponge body (2) and the negative pressure end (12).

2. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 1, wherein A first flushing tube (4) is arranged inside the drainage catheter (1). The first flushing tube (4) includes a first liquid inlet end (41) and a first liquid outlet end (42). The first liquid inlet end (41) is arranged at the negative pressure end (12), and the first liquid outlet end (42) is arranged on the side of the second sponge body (3) away from the first sponge body (2).

3. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 2, characterized in that, A second flushing tube (5) is arranged inside the drainage catheter (1). The second flushing tube (5) includes a second liquid inlet end (51) and a second liquid outlet end (52). The second liquid inlet end (51) is arranged at the negative pressure end (12), and the second liquid outlet end (52) is covered and arranged inside the first sponge body (2). The port (521) of the second liquid outlet end (52) is recessed or flush with the surface (21) of the first sponge body (2).

4. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 1, wherein The pore diameter of the first sponge body (2) is 400 - 600 μm.

5. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 1, characterized in that, The pore diameter of the second sponge body (3) is 600 - 800 μm.

6. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 1, wherein, The liquid suction holes (13) include a first liquid suction hole (131) and a second liquid suction hole (132). The first liquid suction hole (131) and the second liquid suction hole (132) are arranged in a staggered manner on the opposite sides along the axial direction of the drainage catheter (1).

7. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 1, characterized in that, The pore diameters of the liquid suction holes (13) are different.

8. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 3, wherein The first liquid inlet end (41) and / or the second liquid inlet end (51) is connected to a flushing liquid supply device.

9. The intracavitary negative pressure device for treating upper gastrointestinal fistula according to claim 3, wherein, A stop clamp (6) is arranged at the first liquid inlet end (41) and / or the second liquid inlet end (51).

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