Intracavity negative pressure device for treating lower digestive tract fistula
By designing an intraluminal negative pressure device including a drainage tube, a cannula and an open elastomer, the problems of poor drainage effect and damage to the intestinal wall in the prior art are solved, and efficient drainage and fistula healing are achieved.
Patent Information
- Application Number
- CN202421818239.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-30
AI Technical Summary
A single drainage tube used for drainage of lower digestive tract fistula in the prior art can easily absorb the intestinal wall, have poor drainage effect, and may cause damage to the lower digestive tract wall, which is not conducive to the healing of the fistula.
A negative pressure device in the cavity is designed, including a drainage tube, a sleeve and an open elastomer. A plurality of first drainage holes and a second drainage holes are provided on the drainage tube, the sleeve covers the first drainage hole, and the opening elastic body covers the second drainage hole. Through this structure, the open-hole elastomer adsorbs small volumes of slag-carrying substances and pus, while the cannula adsorbs large volumes of viscous substances, improving the drainage effect and reducing damage to the intestinal wall.
The device improves the drainage effect at the lower digestive tract fistula through the partitioned open elastomer and cannula, reduces damage to the intestinal wall, and is conducive to the healing of the fistula and the recovery of the patient.
Smart Images
Figure CN222968932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, and particularly relates to an intracavitary negative pressure device for treating lower digestive tract fistulas. Background Art
[0002] Anastomotic fistula is a common and serious surgical complication after digestive tract reconstruction. To avoid the occurrence of complications, it is necessary to timely clean the pollutants at the fistula opening, such as fecal fluid, infected and necrotic tissues, etc., which is beneficial to the healing of the fistula opening.
[0003] In the prior art, when draining a lower digestive tract fistula, a single drainage tube is used. One end of the drainage tube is provided with a liquid suction hole, and the other end is connected to a negative pressure device for suction. This kind of drainage method is very easy to suck the intestinal wall, resulting in poor drainage effect; seriously, it will cause damage to the lower digestive tract wall and is not conducive to the healing of the fistula opening. 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 lower digestive tract fistulas, which improves the drainage effect and is conducive to the healing of the fistula opening.
[0005] To achieve the above technical effects, the technical solution of the utility model is: an intracavitary negative pressure device for treating lower digestive tract fistulas, comprising:
[0006] A drainage tube, including an attracting end and a negative pressure end arranged oppositely, and provided with a first drainage hole and a second drainage hole;
[0007] A sleeve, provided with a third drainage hole, sleeved on the drainage tube and fixedly connected with the drainage tube;
[0008] An opening elastic body, covering the drainage tube and connected with the sleeve;
[0009] The first drainage hole is wrapped by the sleeve, and the second drainage hole is wrapped by the opening elastic body.
[0010] The preferred technical solution is that the first drainage hole and the third drainage hole are arranged in a dislocation manner.
[0011] The preferred technical solution is that the drainage tube includes a first side wall, and the first drainage hole and the second drainage hole are arranged on the attracting end and the first side wall close to the attracting end.
[0012] The preferred technical solution is that the sleeve includes a second side wall and a fixed end and an opening end arranged oppositely, the third drainage hole is arranged on the second side wall, the fixed end is fixedly connected with the drainage tube, and the opening end is connected with the opening elastic body.
[0013] Preferably, the sleeve has a cavity formed by enclosing the fixed end and the second side wall; the drainage tube is arranged in the cavity and the suction end is fixedly connected to the fixed end, and the perforated elastomer is fixedly connected to the open end.
[0014] Preferably, the fixed end and the open end are arranged in a through manner, the first side wall is fixedly connected to the fixed end, and the perforated elastomer is fixedly connected to the open end.
[0015] Preferably, the length of the sleeve is 1-5 cm.
[0016] Preferably, the length of the perforated elastomer is 4-10 cm.
[0017] Preferably, the inner diameter of the sleeve is 0.5-2 cm, and the inner diameter of the drainage tube is 2-5 mm.
[0018] Preferably, it further includes a negative pressure device, and the negative pressure end is connected to the negative pressure device.
[0019] The advantages and beneficial effects of the present utility model are as follows:
[0020] By separately arranging the perforated elastomer and the sleeve outside the tube wall of the drainage tube and respectively covering the first drainage hole and the second drainage hole on the drainage tube, the perforated elastomer and the sleeve cooperate to improve the drainage effect;
[0021] The first drainage hole is covered by the perforated elastomer to adsorb small-volume slag-containing substances, pus and necrotic tissues. The perforated elastomer undergoes macro-deformation under negative pressure, which can cause the wound surface to shrink, and can induce the growth of granulation tissue and promote wound healing; the second drainage hole is covered by the sleeve, and the aperture of the third drainage hole on the sleeve is larger than the aperture of the perforated elastomer, which is used to adsorb large-volume slag-containing substances and highly viscous liquids that the perforated elastomer cannot adsorb; ultimately, efficient and comprehensive adsorption drainage at the lower digestive tract fistula is realized, which is beneficial to the closure of the fistula and the recovery of the patient. Description of the Drawings
[0022] Figure 1 is a three-dimensional structural schematic diagram of the intracavitary negative pressure device for treating lower digestive tract fistula in the embodiment;
[0023] Figure 2 is Figure 1 the exploded structural schematic diagram at A in
[0024] Figure 3 is a three-dimensional structural schematic diagram of the intracavitary negative pressure device for treating lower digestive tract fistula in another embodiment;
[0025] Figure 4 isFigure 3 Schematic diagram of the explosion structure at position B
[0026] In the figure: 1. Drainage tube; 11. Suction end; 12. Negative pressure end; 13. First drainage hole; 14. Second drainage hole; 15. First side wall; 151. Outer wall; 2. Sleeve; 21. Third drainage hole; 22. Second side wall; 221. Inner wall; 23. Fixed end; 24. Open end; 25. Cavity; 3. Open-cell elastomer; 4. Negative pressure device. Specific embodiments
[0027] The following combines the drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.
[0028] In the description of the present utility model, it should be noted that unless otherwise stated, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present utility model 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 of the present utility model.
[0029] In the description of the present utility model, 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 utility model can be understood according to specific circumstances.
[0030] As Figures 1 - 4 shown, an embodiment of an intracavitary negative pressure device for treating lower gastrointestinal fistulas includes:
[0031] A drainage tube 1, including a suction end 11 and a negative pressure end 12 arranged oppositely, and provided with a first drainage hole 13 and a second drainage hole 14;
[0032] A sleeve 2, provided with a third drainage hole 21, sleeved on the drainage tube 1 and fixedly connected to the drainage tube 1;
[0033] An open-cell elastomer 3, covering the drainage tube 1 and connected to the sleeve 2;
[0034] The first drainage hole 13 is wrapped by the sleeve 2, and the second drainage hole 14 is wrapped by the open-cell elastomer 3.
[0035] During use, the suction end 11 of the drainage tube 1 is placed at the lower digestive tract fistula, and the negative pressure end 12 is connected to the negative pressure device 4; a plurality of first drainage holes 13 and a plurality of second drainage holes 14 are provided on the tube wall of the drainage tube 1 placed in the lower digestive tract and the suction end 11.
[0036] Drainage holes are provided on the tube wall of the drainage tube 1, and the drainage holes include first drainage holes 13 covered by the sleeve 2 and second drainage holes 14 covered by the perforated elastomer 3.
[0037] Furthermore, the perforated elastomer includes, but is not limited to, sponge, artificial sponge, and foam.
[0038] Preferably, the perforated elastic member is a sponge.
[0039] By providing the perforated elastomer 3, on the one hand, it can timely adsorb viscous substances or residue-containing substances in the lower digestive tract; on the other hand, the perforated elastomer 3 is wrapped outside the tube wall of the drainage tube 1, which buffers the negative pressure suction, and the softness of the perforated elastomer 3 prevents the drainage tube 1 from directly and strongly adsorbing the lower digestive tract wall and causing damage when the drainage tube 1 is in a negative pressure state.
[0040] By providing the sleeve 2 and the third drainage hole 21 is provided on the sleeve 2, since the adsorption pore diameter of the perforated elastomer 3 is much smaller than the pore diameter of the third drainage hole 21, the adsorption capacity of the perforated elastomer 3 is limited. Therefore, through the third drainage hole 21, viscous substances or residue-containing substances that cannot be adsorbed by the perforated elastomer 3 can be adsorbed. The adsorption effect at the fistula is improved, which is beneficial to the closure and recovery of the patient's fistula.
[0041] If the sleeve 2 is not provided and a single drainage tube 1 directly sucks, the drainage tube 1 is directly placed at the lower digestive tract fistula. After the negative pressure device 4 is started, it is easy to directly adsorb the lower digestive tract wall onto the drainage tube 1. On the one hand, the lower digestive tract wall blocks the drainage holes of the drainage tube 1 and cannot adsorb viscous substances or residue-containing substances that cannot be adsorbed by the perforated elastomer 3, greatly reducing the adsorption effect at the fistula. On the other hand, the drainage tube 1 is likely to cause damage to the lower digestive tract wall.
[0042] In this embodiment, the sleeve 2 is provided and the negative pressure device 4 is started. When there are drainage substances such as mucus and residue-containing substances in the lower digestive tract, the drainage substances enter the gap between the sleeve 2 and the drainage tube 1 from the third drainage hole 21 of the sleeve 2 and are finally sucked out by the drainage tube 1 with negative pressure; when there is no drainage substance in the lower digestive tract, the negative pressure device 4 sucks the air between the drainage tube 1 and the sleeve 2 through the drainage tube 1; therefore, the sleeve 2 avoids the direct contact between the drainage tube 1 and the lower digestive tract wall, thereby avoiding damage to the lower digestive tract wall by the drainage tube 1.
[0043] As Figures 1 - 4 shown, in another preferred embodiment, the first drainage hole 13 and the third drainage hole 21 are arranged in a staggered manner.
[0044] The first drainage hole 13 is the part covered by the sleeve 2, and is arranged offset from the third drainage hole 21 on the sleeve 2, slowing down the rate of negative pressure adsorption. When the negative pressure adsorption force acts on the lower digestive wall through the first drainage hole 13 and the third drainage hole 21, the magnitude of the negative pressure suction remains unchanged, the direction is dispersed, and the suction is not concentrated, further avoiding the lower digestive tract wall being adsorbed onto the sleeve 2 when the negative pressure suction is too large.
[0045] As Figures 1 - 4 shown, in another preferred embodiment, the drainage tube 1 includes a first side wall 15, and the first drainage hole 13 and the second drainage hole 14 are arranged on the suction end 11 and the first side wall 15 close to the suction end 11.
[0046] As Figure 1 、 Figure 3 shown, in another preferred embodiment, it further includes a negative pressure device 4, and the negative pressure end 12 is connected to the negative pressure device 4.
[0047] During use, the suction end 11 is placed at the lower digestive tract fistula, and the negative pressure end 12 is connected to the negative pressure device 4.
[0048] As Figures 1 - 2 shown, in another preferred embodiment, the sleeve 2 includes a second side wall 22 and a fixed end 23 and an open end 24 arranged opposite to each other. The third drainage hole 21 is arranged on the second side wall 22. The fixed end 23 is fixedly connected to the drainage tube 1, and the open end 24 is connected to the perforated elastomer 3.
[0049] As Figures 1 - 2 shown, the sleeve 2 has a cavity 25 formed by enclosing the fixed end 23 and the second side wall 22; the drainage tube 1 is arranged in the cavity 25, and the suction end 11 is fixedly connected to the fixed end 23, and the perforated elastomer 3 is fixedly connected to the open end 24.
[0050] In this embodiment, it is a connection method of the sleeve 2, the perforated elastomer 3 and the drainage tube 1. The fixed end 23 of the sleeve 2 is a closed structure; the fixed end 23 is fixedly connected to the drainage tube 1 to prevent relative movement between the drainage tube 1 and the sleeve 2 and affect the drainage effect. Further, the sleeve 2 and the perforated elastomer 3 are fixedly connected by gluing or by suturing, etc.
[0051] As Figures 3 - 4 shown, in another preferred embodiment, the fixed end 23 and the open end 24 are arranged in a through manner, the first side wall 15 is fixedly connected to the fixed end 23, and the perforated elastomer 3 is fixedly connected to the open end 24.
[0052] This embodiment is another connection method of the sleeve 2, the perforated elastic body 3 and the drainage tube 1. Different from the previous embodiment, the fixed end 23 of the sleeve 2 is a non-enclosed structure, the drainage tube 1 is inserted into the sleeve 2, and the first side wall 15 of the drainage tube 1 is fixedly connected to the fixed end 23 of the sleeve 2; the perforated elastic body 3 covers the suction end 11 and the first side wall 15 of the drainage tube 1 and is fixedly connected to the open end 24 of the sleeve 2.
[0053] Furthermore, the outer area of the drainage tube 1 is sleeved with a sleeve 2 and an open-pored elastic body 3, and the relative positions of the sleeve 2 and the open-pored elastic body 3 are not limited, as long as the first drainage hole 13 and the second drainage hole 14 of the drainage tube 1 are completely covered.
[0054] like Figures 1 - 4 As shown, in another preferred embodiment, the length of the sleeve 2 is 1-5 cm.
[0055] like Figures 1 - 4 As shown, in another preferred embodiment, the length of the open-cell elastic body 3 is 4 to 10 cm.
[0056] The length of the sleeve 2 and the perforated elastic body 3 is determined specifically according to the clinical patient's condition. The perforated elastic body 3 and the sleeve 2 are the parts inserted into the patient's body, and need to cover the lower digestive tract area to improve the drainage effect. If the sleeve 2 is too long, the drainage holes on the drainage tube 1 covered by the perforated elastic body 3 are relatively few, the negative pressure effect is poor, and the drainage effect is poor; if the sleeve 2 is too short, the drainage fluid cannot be drained in time if there are more viscous substances with high viscosity or larger volume of residue-bearing substances in the drainage fluid.
[0057] like Figures 1 - 4 As shown, in another preferred embodiment, the inner diameter of the sleeve 2 is 0.5-2 cm, and the inner diameter of the drainage tube 1 is 2-5 mm.
[0058] In this embodiment, the wall thickness of the sleeve 2 is 1-2 mm; the thickness of the drainage tube 1 is 1-2 mm.
[0059] Furthermore, the distance between the outer wall 151 of the first side wall 15 and the inner wall 221 of the second side wall 22 is greater than 0 mm and less than or equal to 17 mm. If the distance is too small, the gap between the first side wall 15 and the second side wall 22 is easily blocked, which is not conducive to drainage; if the distance is too large, it is difficult to form negative pressure and the drainage effect is poor.
[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. An intracavitary negative pressure device for treating lower gastrointestinal fistula, characterized in that: include: The drainage tube (1) comprises a suction end (11) and a negative pressure end (12) arranged opposite to each other, and is provided with a first drainage hole (13) and a second drainage hole (14); A sleeve (2) provided with a third drainage hole (21), sleeved on the drainage tube (1) and fixedly connected to the drainage tube (1); An open-pore elastic body (3) covering the drainage tube (1) and connected to the sleeve (2); The first drainage hole (13) is wrapped by the sleeve (2), and the second drainage hole (14) is wrapped by the open-pore elastic body (3).
2. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 1, characterized in that: The first drainage hole (13) and the third drainage hole (21) are arranged in a staggered manner.
3. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 1, characterized in that: The drainage tube (1) comprises a first side wall (15), and the first drainage hole (13) and the second drainage hole (14) are arranged at the suction end (11) and the first side wall (15) close to the suction end (11).
4. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 3, characterized in that: The sleeve (2) comprises a second side wall (22) and a fixed end (23) and an open end (24) arranged opposite to each other, the third drainage hole (21) is arranged on the second side wall (22), the fixed end (23) is fixedly connected to the drainage tube (1), and the open end (24) is connected to the open-pore elastic body (3).
5. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 4, characterized in that: The sleeve (2) has a cavity (25) formed by the fixed end (23) and the second side wall (22); the drainage tube (1) is arranged in the cavity (25) and the suction end (11) is fixedly connected to the fixed end (23); the open-hole elastic body (3) is fixedly connected to the open end (24).
6. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 4, characterized in that: The fixed end (23) and the open end (24) are interlinked, the first side wall (15) is fixedly connected to the fixed end (23), and the open-hole elastic body (3) is fixedly connected to the open end (24).
7. The intracavitary negative pressure device for treating lower digestive tract fistula according to claim 1, characterized in that: The sleeve (2) has a length of 1 to 5 cm.
8. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 1, characterized in that: The length of the open-cell elastic body (3) is 4 to 10 cm.
9. The intracavitary negative pressure device for treating lower gastrointestinal fistula according to claim 1, characterized in that: The inner diameter of the sleeve (2) is 0.5-2 cm, and the inner diameter of the drainage tube (1) is 2-5 mm.
10. The intracavitary negative pressure device for treating lower digestive tract fistula according to claim 1, characterized in that: It also includes a negative pressure device (4), and the negative pressure end (12) is connected to the negative pressure device (4).