Double-layered sleeve for small intestine endoscope

Abstract

The utility model belongs to the field of medical apparatus and instruments provides a kind of small intestine mirror double-layer sleeve, including inner sleeve, outer sleeve, wherein inner sleeve, outer sleeve all have flushing function, small intestine mirror is located in inner sleeve lumen, inner sleeve is located in outer sleeve lumen, inner sleeve and outer sleeve front end are equipped with the balloon of communication with inflation cavity, when using, by controlling the relative position between inner sleeve and small intestine mirror can adjust flushing area, also can flush and lubricate to inner sleeve by outer sleeve simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically providing a double-layer cannula for a small enteroscope. Background Technology

[0002] Enteroscopy is an important medical tool used clinically for the examination, diagnosis, and treatment of small bowel diseases. The enteroscopic cannula is primarily used during enteroscopy, and currently, there are single-balloon and double-balloon enteroscopy methods. Due to the relatively long length, high elasticity, and numerous twists and turns of the human small intestine, enteroscopy is quite challenging. The use of the enteroscopic cannula helps to address some of these challenges. For example, it allows for a more comprehensive examination of the patient's small intestine, and in some designs, it can isolate the outer surface of the enteroscope from the internal lumen of the body, reducing the risk of cross-infection and improving the safety of the procedure.

[0003] During examinations, inadequate bowel preparation or bleeding can obstruct the field of view, necessitating timely irrigation. However, existing enteroscope cannulas have limited irrigation ranges, failing to cover the portion of the enteroscope protruding from the cannulas. This results in only moderate cleaning of the enteroscope surface, further impairing the field of view and prolonging the procedure. Therefore, there is an urgent need for a cannulas with an irrigation range that can cover the entire enteroscope. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this utility model provides a double-layered cannula whose cleaning range can cover the entire small enteroscope, including an inner cannula and an outer cannula. Both the inner and outer cannulas have a rinsing function. The small enteroscope is located in the lumen of the inner cannula, and the inner cannula is located in the lumen of the outer cannula. The front ends of both the inner and outer cannulas are provided with balloons that communicate with the inflation chamber. During use, the rinsing area can be adjusted by controlling the relative position between the inner cannula and the small enteroscope. At the same time, the inner cannula can be rinsed and lubricated through the outer cannula.

[0005] The specific technical solution provided by this utility model is as follows: The enteroscope has a double-layered cannula, consisting of an inner cannula and an outer cannula. The enteroscope passes through the inner cannula first, then through the outer cannula. The inner cannula has an inner balloon at its front end and an inner cannula lumen at its rear end. The inner cannula lumen has an inner balloon inflation port and an inner cannula interface, which communicate with the inner balloon inflation chamber and the inner cannula lumen, respectively. The inner balloon has an inner balloon inflation port that communicates with the inner balloon inflation chamber. The outer cannula has an outer cannula balloon at its front end and an outer cannula lumen at its rear end. The outer cannula lumen has an outer balloon inflation port and an outer cannula interface, which communicate with the outer balloon inflation chamber and the outer cannula lumen, respectively. The outer balloon has an outer balloon inflation port that communicates with the outer balloon inflation chamber.

[0006] Furthermore, the inner cannula is provided with an inner cannula imaging ring at the front end and a second sealing membrane at the rear end of the inner cannula lumen. The second sealing membrane also has imaging function. There is a round hole in the middle of the second sealing membrane with a diameter smaller than the outer diameter of the enteroscope, which is used to prevent liquid from overflowing or splashing when the enteroscope and inner cannula move, so as to avoid affecting the surgical operation and reduce infection.

[0007] Furthermore, the outer sleeve is provided with an outer sleeve imaging ring at the front end and a first sealing membrane at the rear end of the outer sleeve lumen. The first sealing membrane also has imaging function. There is a circular hole in the middle of the first sealing membrane with a diameter smaller than the outer diameter of the inner sleeve, which is used to prevent liquid from overflowing or splashing when the inner sleeve and outer sleeve move, so as to avoid affecting the surgical operation and reduce infection.

[0008] Furthermore, pleats can also be provided on the first and second sealing membranes to better prevent liquid splashing.

[0009] Furthermore, the outer wall of the inner sleeve and the inner wall of the outer sleeve are provided with a super-slippery coating. This hydrophilic super-slippery coating can be activated by injecting physiological saline through the inner sleeve and outer sleeve interfaces, making insertion of the endoscope smoother. The surfaces of both the inner and outer sleeves are treated with a super-slippery coating to reduce resistance during insertion and position adjustment.

[0010] Furthermore, a negative pressure device can be connected to the inner sleeve interface and the outer sleeve interface to drain excess liquid from the inner sleeve cavity and the outer sleeve cavity respectively.

[0011] Furthermore, the outer sleeve is made of transparent silicone, and the inner sleeve is made of transparent silicone or TPU / PVC.

[0012] Compared with the prior art, the present invention has achieved the following technical effects: (1) The small enteroscope double-layer cannula provided by this utility model is a combination of inner cannula and outer cannula. The small enteroscope is placed in the lumen of the inner cannula and the inner cannula is placed in the lumen of the outer cannula. The inner cannula balloon and the outer cannula balloon are alternately inflated and deflated, so that the inner cannula and the outer cannula are gradually advanced forward. The balloon can be used to pull the intestinal wall backward to achieve the effect of bringing the intestinal lumen closer, which facilitates the rapid examination.

[0013] (2) Both the inner and outer tubes have a rinsing function. When in use, the rinsing area can be adjusted by controlling the relative position between the inner tube and the enteroscope. At the same time, the inner tube can be rinsed and lubricated by the outer tube. The rinsing range can cover the entire enteroscope.

[0014] (3) The front end of both the inner and outer cannulas is equipped with a imaging ring, and the first and second sealing membranes at the rear end also have imaging functions, which can better position the endoscope during insertion and improve the insertion efficiency of the enteroscope.

[0015] (4) The outer wall of the inner cannula and the inner wall of the outer cannula are coated with a super-slippery coating. The hydrophilic super-slippery coating can be activated by injecting physiological saline through the inner cannula interface and the outer cannula interface, making the insertion of the endoscope smoother. The surfaces of the inner cannula and the outer cannula are treated with super-slippery coating to reduce the resistance encountered during insertion and adjustment, and to reduce the burden on the patient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a double-layered cannula for a small bowel endoscope. Figure 2 This is a cross-sectional view of the outer cannula within the double-layered cannula of a small bowel endoscope. Figure 3 This is a cross-sectional view of the inner cannula in a double-layered enteroscope.

[0017] Wherein: 1 is the enteroscope, 2 is the inner cannula, 2-1 is the inner cannula balloon inflation chamber, 2-2 is the inner cannula lumen, 2-3 is the inner cannula imaging ring, 2-4 is the inner cannula balloon inflation port, 3 is the inner cannula balloon, 4-1 is the first sealing membrane, 4-2 is the second sealing membrane, 5 is the outer cannula, 5-1 is the outer cannula balloon inflation chamber, 5-2 is the outer cannula lumen, 5-3 is the outer cannula imaging ring, 5-4 is the outer cannula balloon inflation port, 6 is the outer cannula balloon, 7 is the outer cannula lumen tip, 7-1 is the outer cannula balloon inflation interface, 7-2 is the outer cannula interface, 8 is the inner cannula lumen tip, 8-1 is the inner cannula balloon inflation interface, 8-2 is the inner cannula interface. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] This invention provides a double-layered cannula for a small bowel endoscope, such as... Figure 1As shown, the device includes an inner cannula 2 and an outer cannula 5. The enteroscope 1 first passes through the inner cannula 2, and then the inner cannula 2 passes through the outer cannula 5. The inner cannula 2 has an inner cannula balloon 3 at its front end and an inner cannula lumen 8 at its rear end. The inner cannula lumen 8 is provided with an inner cannula balloon inflation interface 8-1 and an inner cannula interface 8-2, which are respectively connected to the inner cannula balloon inflation chamber 2-1 and the inner cannula lumen 2-2. The inner cannula balloon 3 is provided with an inner cannula balloon inflation hole 2-4, which is connected to the inner cannula balloon inflation chamber 2-1. The outer tube 5 has an outer tube balloon 6 at its front end and an outer tube lumen head 7 at its rear end. The outer tube lumen head 7 has an outer tube balloon inflation interface 7-1 and an outer tube interface 7-2, which are respectively connected to the outer tube balloon inflation chamber 5-1 and the outer tube lumen 5-2. The outer tube balloon 6 has an outer tube balloon inflation hole 5-4, which is connected to the outer tube balloon inflation chamber 5-1.

[0020] The inner cannula 2 has a contrast-enhancing ring 2-3 at its front end and a second sealing membrane 4-2 at its rear end. The second sealing membrane 4-2 also has a contrast-enhancing function and a circular hole in its center with a diameter smaller than the outer diameter of the enteroscope 1 to prevent liquid leakage or splashing during the movement of the enteroscope 1 and the inner cannula 2. Similarly, the outer cannula 5 has a contrast-enhancing ring 5-3 at its front end and a first sealing membrane 4-1 at its rear end. The first sealing membrane 4-1 also has a contrast-enhancing function and a circular hole in its center with a diameter smaller than the outer diameter of the inner cannula to prevent liquid leakage or splashing during the movement of the inner cannula 2 and the outer cannula 5, thus avoiding interference with surgical procedures and reducing infection.

[0021] Preferably, pleats can be provided on the first sealing membrane 4-1 and the second sealing membrane 4-2 to better prevent liquid splashing.

[0022] The inner cannula 2 and the outer cannula 5 have a super-slippery coating on their outer walls. Before insertion into the human body, physiological saline can be injected through the inner cannula interface 8-2 and the outer cannula interface 7-2 to activate the hydrophilic super-slippery coating. After insertion, if repeated friction causes obstruction, a small amount of physiological saline can be injected through the inner cannula interface 8-2 and the outer cannula interface 7-2 to facilitate smoother insertion. Both the inner cannula 2 and the outer cannula 5 have a super-slippery surface treatment to reduce resistance during insertion and position adjustment.

[0023] If drainage is required during the inspection, a negative pressure device can be connected through the inner tube interface 8-2 and the outer tube interface 7-2 to drain excess liquid from the body through the inner tube cavity 2-2 and the outer tube cavity 5-2 respectively.

[0024] The outer sleeve 5 is made of transparent silicone, and the inner sleeve 2 is made of transparent silicone or TPU / PVC.

[0025] The specific implementation method is as follows: In use, first insert the enteroscope 1 through the lumen 2-2 of the inner cannula, then insert the combination of the inner cannula 2 and the enteroscope 1 through the lumen 5-2 of the outer cannula. The outer wall of the inner cannula 2 and the inner wall of the outer cannula 5 are coated with a super-slippery coating. Before insertion into the human body, inject physiological saline through the inner cannula interface 8-2 and the outer cannula interface 7-2 to activate the hydrophilic super-slippery coating. Then insert the endoscope through the anus or mouth. After inserting the endoscope a certain distance, first inflate the inner cannula balloon 3 through the inner cannula balloon inflation interface 8-1. The inner cannula balloon 3 expands, making it difficult for the head of the enteroscope 1 to slip. Then push the outer cannula 5 forward to the rear of the inner cannula balloon 3, and then inflate the outer cannula balloon through the outer cannula balloon inflation interface 7-1. 6. Inflate the balloon. At this point, both the inner cannula balloon 3 and the outer cannula balloon 6 are inflated. The positions of the enteroscope 1, inner cannula 2, outer cannula 5, and intestinal wall are relatively fixed. Then, slowly pull the enteroscope 1 and outer cannula 5 backward. The small intestine will be pulled and folded up, achieving the effect of bringing it closer to the intestinal lumen. Next, deflate the inner cannula balloon 3 and continue to advance the inner cannula 2 and enteroscope 1 forward until they can no longer be advanced. Inflate the inner cannula balloon 3 again, while deflating the outer cannula balloon 6. The outer cannula 5 continues to advance forward. Repeat this process. By repeating the above actions of inflation, deflation, advancing the outer cannula, and pulling backward, the enteroscope 1 can be slowly and evenly advanced into the depths of the small intestine.

[0026] During operation, the insertion position of the endoscope can be determined by observing the inner cannula imaging ring 2-3 at the front end of the inner cannula 2 and the second sealing membrane 4-2 at the rear end, and the outer cannula imaging ring 5-3 at the front end and the first sealing membrane 4-1 at the rear end of the outer cannula 5, assisting medical staff in making adjustments. When flushing or lubrication is required, flushing fluid or lubricant can be injected through the inner cannula interface 8-2 and the outer cannula interface 7-2 to flush or lubricate the enteroscope 1 and the inner cannula 2. When drainage is required, a negative pressure device can be connected through the inner cannula interface 8-2 and the outer cannula interface 7-2 to drain excess fluid from the inner cannula lumen 2-2 and the outer cannula lumen 5-2, respectively.

[0027] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A double-layered overtube for small intestinal endoscopy comprising an inner overtube (2) and an outer overtube (5), characterized in that, The enteroscope (1) first passes through the inner cannula (2), then through the outer cannula (5). The inner cannula (2) has an inner cannula balloon (3) at its front end and an inner cannula lumen (8) at its rear end. The inner cannula lumen (8) has an inner cannula balloon inflation port (8-1) and an inner cannula port (8-2), which are respectively connected to the inner cannula balloon inflation chamber (2-1) and the inner cannula lumen (2-2). The inner cannula balloon (3) has an inner cannula balloon inflation port (2-4). It is connected to the inner cannula balloon inflation chamber (2-1); the front end of the outer cannula (5) is provided with an outer cannula balloon (6), and the tail end of the outer cannula (5) is sleeved with an outer cannula lumen head (7). The outer cannula lumen head (7) is provided with an outer cannula balloon inflation interface (7-1) and an outer cannula interface (7-2), which are respectively connected to the outer cannula balloon inflation chamber (5-1) and the outer cannula lumen (5-2). The outer cannula balloon (6) is provided with an outer cannula balloon inflation hole (5-4), which is connected to the outer cannula balloon inflation chamber (5-1).

2. The small intestinal endoscopic double-layer sleeve according to claim 1, characterized in that, The inner tube (2) has an inner tube imaging ring (2-3) at the front end and a second sealing membrane (4-2) at the rear end of the inner tube lumen. The second sealing membrane (4-2) has a round hole in the middle with a diameter smaller than the outer diameter of the enteroscope.

3. The small intestinal endoscopic double-layer sleeve according to claim 1, wherein, The outer sleeve (5) has an outer sleeve imaging ring (5-3) at the front end and a first sealing membrane (4-1) at the rear end of the outer sleeve cavity. The first sealing membrane (4-1) has a round hole in the middle with a diameter smaller than the outer diameter of the inner sleeve.

4. The small intestinal endoscopic double-layer sleeve according to claim 2 or 3, characterized in that, The first sealing membrane (4-1) and the second sealing membrane (4-2) are provided with pleats.

5. The double-layered enteroscopy cannula according to claim 2 or 3, wherein, The outer wall of the inner sleeve (2) and the inner wall of the outer sleeve (5) are provided with a super-slippery coating.

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