Duodenoscope fixing device

Abstract

The duodenoscope fixing device comprises a double-balloon structure and an inflation and deflation structure which are detachably connected to the outside of a duodenoscope body, the double-balloon structure can enter the duodenum along with the duodenoscope body, the duodenoscope body is stabilized at the proper position of the duodenum according to the distance from the duodenal papilla to the pylorus of a patient, and the duodenoscope body is fixed to the position of the duodenoscope body. Therefore, the front end of the duodenoscope can be effectively prevented from being separated from the pylorus in the process of shortening the straight line of the duodenoscope body. Besides, the double-balloon structure has plasticity, the endoscope body is allowed to slide back and forth relative to the balloons moderately, the potential requirement of adjusting the tip of the endoscope body up and down within a small range in the axial adjustment process during transnipple biliopancreatic duct intubation is met, large-amplitude sliding of the endoscope body in the duodenum tip fine adjustment process is avoided, and the intubation operation difficulty can be reduced. And meanwhile, the inflating and deflating structure of the device is arranged on the operating handle of the duodenoscope, so that a doctor can operate with one hand conveniently, and the convenience and the flexibility of operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a duodenoscope fixing device. Background Art

[0002] The endoscopic retrograde cholangiopancreatography (ERCP) operation requires inserting a side-view duodenoscope through the mouth into the descending part of the duodenum, and then inserting a special instrument through the duodenal papilla into the bile duct or pancreatic duct to complete imaging and disease diagnosis and treatment.

[0003] When the duodenoscope is inserted, the body of the scope first reaches the gastric cavity, where it bends along the greater curvature of the stomach. When the body of the scope is pushed forward and the front end of the scope reaches the vicinity of the duodenal papilla, the force is not easily transmitted due to the bending of the body in the gastric cavity, which will cause difficulties for subsequent intubation. Therefore, the body of the scope needs to be pulled back to shorten and straighten, so that it is as close to the lesser curvature of the stomach as possible, and presents an L shape under X-ray fluoroscopy. However, during the pulling back process, since there is no force point at the front end of the scope, the front end of the scope is very easy to come out of the pylorus, resulting in multiple repeated operations for each insertion process, which is difficult to operate.

[0004] After the front end of the endoscope reaches the vicinity of the duodenal papilla, in order to ensure that the catheter can be smoothly inserted along the correct axis, it is necessary to repeatedly adjust the up and down, left and right knobs of the endoscope, rotate the endoscope body, push or pull back the endoscope, and slightly adjust the front end position of the endoscope to make the papilla appear positive, so as to ensure that the catheter is deeply inserted into the bile and pancreatic duct through the papilla in the correct direction. However, due to the special gastroduodenal structure of a few patients, or due to duodenal stiffness caused by bile and pancreatic diseases, or frequent intestinal peristalsis, it is difficult for the endoscope to stabilize in the duodenum. In the process of adjusting the front end position of the endoscope, the duodenoscope is easily dislocated from the pylorus, thereby increasing the difficulty of operation and treatment time. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a duodenoscope fixing device to solve the problem that the current duodenoscope is difficult to stabilize in the duodenum.

[0006] The technical solution adopted by the present invention is as follows: A duodenoscope fixing device comprises a double-balloon structure detachably connected to the outside of the scope body. The double-balloon structure is used to stabilize the scope body in the duodenum according to the patient's anatomical structure. The double-balloon structure has moderate sliding properties during intubation.

[0007] Compared with the prior art, the principles and beneficial effects of the present invention are as follows: When inserting the scope, the double balloon structure stabilizes the scope body in the duodenum to provide support for the scope body, which can effectively prevent the front end of the duodenoscope from slipping out of the pylorus during the shortening of the scope body. During intubation, the scope body is allowed to slide back and forth moderately relative to the double balloon structure to meet the intubation fine-tuning and avoid the large sliding of the duodenum during the fine-tuning of the front end of the duodenum, thereby reducing the difficulty of operation and shortening the treatment time.

[0008] In the present invention, in order not to affect the adjustment of the distance between the front end of the duodenoscope and the nipple, it is appropriate to place the fixed balloon in a section of the intestinal tube connected to the pylorus near the upper part of the duodenum away from the nipple. The lumen diameter of this part of the intestinal tube is large, and the duodenoscope has a large range of motion here. The location of the duodenal papilla is mainly located in the middle and lower part of the descending part of the duodenum, which is about 8 to 10 cm away from the pylorus, and there are certain differences in the location of the papilla of different individuals.

[0009] Due to individual differences among patients, the anatomical distances between the pylorus and the nipple are different, so the distance between the double balloon structure and the front end of the duodenoscope needs to be adjusted according to the distance between the pylorus and the nipple. After the double balloon structure of the present invention enters the duodenum with the mirror body, the fixed position of the mirror body can be flexibly adjusted according to the actual anatomical distance between the pylorus and the nipple of the patient, so as to stabilize the duodenoscope in a section of the intestinal tube connected to the pylorus at the proximal side of the upper duodenum away from the nipple, thereby ensuring the stability of the mirror body.

[0010] As a preferred embodiment of the present invention, the double balloon structure includes two fixed balloons arranged at different distances from the front end of the duodenoscope, a connecting ring is provided between each fixed balloon and the mirror body, the connecting ring is detachably connected to the mirror body, the inner side of the fixed balloon is fixed to the connecting ring, and each fixed balloon is connected to a trachea.

[0011] The connecting ring in the present invention can be visualized under X-ray fluoroscopy. The present invention installs two fixing balloons in series at different distances from the tip. During operation, according to the distance between the nipple and the pylorus of the patient, the fixing balloon at a suitable position can be selected to fix the mirror body under the guidance of the X-ray image, so as to ensure that the fixing position of the mirror body is located at a suitable position between the pylorus and the nipple, thereby ensuring the fixing effect of the mirror body.

[0012] The fixing balloon is fixed to the endoscope body. When the endoscope is inserted, the fixing balloon is extended together with the endoscope body. Under the guidance of the X-ray image, the fixing balloon at an appropriate position can be selected and inflated to fix the endoscope body and the double balloon structure in the duodenum as a whole. At this time, when the endoscope body is pulled back, the front end of the endoscope body will not fall out of the pylorus.

[0013] The fixed balloon is fixed to the connecting ring, and the connection position between the fixed balloon and the connecting ring is a circular line. During intubation, although the outer wall of the fixed balloon abuts against the inner wall of the duodenum, the connection between the mirror body and the fixed balloon is a line connection, and the fixed balloon has plasticity, so the mirror body is allowed to slide back and forth moderately relative to the balloon, meeting the potential need for small upward and downward adjustment of the front end of the mirror body during the axial adjustment process during transpapillary bile and pancreatic duct intubation, avoiding large sliding of the mirror body during fine-tuning of the front end of the duodenum, thereby reducing the difficulty of intubation operation.

[0014] As a preferred embodiment of the present invention, one side of the connecting ring is open, connecting parts are respectively fixed at both ends of the opening, and a rope is tied between the two connecting parts.

[0015] In the present invention, the mirror body is inserted into the opening of the connecting ring and is fixed by the friction between the inner wall of the connecting ring and the mirror body. This solution increases the squeezing of the connecting ring on the mirror body by adding a connecting part and tightening the opening sides of the two connecting parts by ropes, thereby increasing the friction and making the connecting ring more stably fixed on the mirror body.

[0016] As a preferred embodiment of the present invention, the double-balloon structure includes an inner balloon detachably connected to the mirror body, an outer balloon is provided on the outside of the inner balloon, and a partition is shared between the inner balloon and the outer balloon. The volume of the inner balloon is smaller than that of the outer balloon. After the inner balloon is inflated, it can be pressed against the outer wall of the mirror body to fix the double-balloon structure to the mirror body. After the outer balloon is inflated, it can be pressed against the inner wall of the duodenum. The inner balloon and the outer balloon are respectively connected to the trachea.

[0017] When inserting the endoscope, after the inner balloon of the present invention is inflated, the double-balloon structure can be fixed to the endoscope body, and the double-balloon structure can be sent into the duodenum together with the endoscope body. After the double-balloon structure reaches the corresponding position, that is, between the pylorus and the papilla, the outer balloon is inflated to fix the endoscope body and the double-balloon structure in the duodenum as a whole. At this time, the endoscope body is pulled back to make it as close to the lesser curvature of the stomach as possible.

[0018] During intubation, the inner balloon is deflated, and the double-balloon structure and the mirror body can slide relative to each other. At this time, by adjusting the relative position of the double-balloon structure and the mirror body, the front end of the mirror body is located near the nipple to facilitate catheter insertion, which is flexible and convenient to use.

[0019] The outer balloon and the inner balloon of the present invention adopt this inner and outer surrounding structure, which can make the double balloon structure more compact, reduce the volume of the overall structure, and make it easier to pass through narrow passages. Moreover, since the inner balloon itself occupies part of the space of the outer balloon, the inflation amount of the outer balloon can be reduced, and the inflation efficiency can be improved. In addition, a partition is provided between the inner and outer balloons, and the partition can avoid the inner and outer balloons from interfering with each other. On the one hand, it can ensure that the inner and outer balloons can expand evenly when inflated or deflated, avoiding uneven expansion caused by mutual squeezing, which affects the accuracy of the operation. On the other hand, in the process of adjusting the relative position of the double balloon structure and the mirror body, the common layer can be deformed due to the deflation of the inner balloon, which can affect the contact effect between the outer balloon and the intestinal wall.

[0020] As a preferred embodiment of the present invention, the double-balloon structure also includes two clips detachably connected to the lens body, with a distance between the two clips, and the inner and outer balloons are located between the two clips. The two clips are used to prevent the inner and outer balloons from falling off the lens body.

[0021] In the present invention, the clamping ring is fixed on the mirror body. By setting two clamping rings, on the one hand, when the relative position of the double-balloon structure and the mirror body is adjusted, the inner and outer balloons can be prevented from escaping from the mirror body, and vice versa, the mirror body can be prevented from escaping from the inner and outer balloons and escaping from the pylorus. On the other hand, due to the small channel diameter of the pylorus, during the insertion of the mirror, it is difficult to ensure that the inner and outer balloons can smoothly enter the duodenum by relying solely on the friction between the inner balloon and the outer wall of the mirror. However, in this solution, by setting a clamping ring, the inner and outer balloons can be placed on the clamping ring, and the clamping ring provides support for the inner and outer balloons, assisting the inner and outer balloons to smoothly enter the duodenum, thereby facilitating the subsequent stabilization of the mirror body.

[0022] As a preferred embodiment of the present invention, it also includes an inflation and deflation structure detachably connected to the duodenoscope operating handle, the inflation and deflation structure is connected to the trachea, and the inflation and deflation structure is used to inflate or deflate the double balloons respectively.

[0023] When operating the duodenoscope, the doctor holds the scope body with one hand and the operating handle with the other hand. By installing the inflation and deflation structure on the operating handle, the doctor can operate the inflation and deflation structure on the operating handle with one hand, without the need to frequently switch the handle and the inflation and deflation device. The doctor can continue to stabilize the scope body with the other hand, thereby improving the convenience and flexibility of operation.

[0024] As a preferred embodiment of the present invention, the inflation and deflation structure includes a mounting shell, a bellows is provided inside the mounting shell, the upper end of the bellows is closed and fixed with a slide rod, the slide rod is slidably connected to the mounting shell, the upper end of the slide rod passes through the mounting shell and a button is fixed at the passing end, and the lower end of the bellows is fixed to the mounting shell and connected to the air pipe.

[0025] The passage of the duodenum is narrow, and the required expansion degree of the balloon is small, so the inflation volume is small. The bellows is self-forming. After being compressed or stretched, the bellows can maintain a specific shape and will not deform arbitrarily due to changes in external pressure or internal gas. The present invention uses a bellows to inflate and deflate. The bellows, trachea and balloon are sealed. When the bellows are compressed, the volume of the bellows becomes smaller, and the gas in the bellows is pushed into the balloon through the trachea, and the balloon expands. When the bellows are stretched, the volume of the bellows becomes larger, and the air pressure of the bellows decreases. The gas in the balloon returns to the bellows under the action of negative pressure, and the balloon gradually shrinks. The present invention realizes the expansion and contraction of the balloon through the slight expansion and contraction changes of the bellows. It not only has a fast response speed, but also a simple operation process and more precise control, which greatly improves the convenience and accuracy of operation.

[0026] As a preferred embodiment of the present invention, a limiting plate is fixed at the upper end of the bellows, and a pushing structure is provided on one side of the limiting plate. The pushing structure includes a pressure rod, a push rod, and a connecting rod connected between the pressure rod and the push rod. The middle part of the connecting rod is rotatably connected to the mounting shell, and the push rod can be pushed upward by pressing the pressure rod downward.

[0027] In the present invention, the limit plate is fixed at the upper end of the bellows, and when the bellows is extended or compressed, the limit plate moves up or down accordingly. The push structure of the present invention adopts the lever principle. After the bellows is compressed and the limit plate moves down, by pressing the pressure rod downward, the push rod can quickly push the limit plate upward, so that the bellows can be quickly extended again, and the operation is simple and convenient.

[0028] As a preferred embodiment of the present invention, a partition is provided in the installation shell, a avoidance hole is provided in the middle of the partition at a position corresponding to the connecting rod, and the pressure rod and the support rod are respectively located on both sides of the partition.

[0029] The partition provided in the present invention can separate the pressure rod and the push rod on both sides, and can play a role of limiting, ensuring that the push rod is always located on the side close to the limit plate, so as to facilitate the cooperation of the limit plate. If the partition is not provided, the push structure may rotate, causing the pressure rod to rotate to the side of the limit plate, and the pressure rod cannot cooperate with the limit plate, resulting in failure of the push structure.

[0030] As a preferred embodiment of the present invention, a shielding groove is formed on a side of the mounting shell close to the pressure rod, and the pressure rod is located in the shielding groove.

[0031] The present invention can hide the pressure rod in the shielding groove by setting a shielding groove. This setting can make the overall structure smoother and smoother and improve the aesthetics on the one hand, and can reduce the risk of misoperation on the other hand. After the pressure rod is hidden, if you want to press the pressure rod, you need to put your fingers into the groove. This design reduces the possibility of accidental touch and can prevent the doctor from accidentally touching the pressure rod and causing operational errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the distribution of the duodenoscope fixing device of the present invention in the duodenum; Figure 2 It is a structural schematic diagram of a double-balloon structure in a duodenoscope fixing device of the present invention; Figure 3 is a cross-sectional view of a double-balloon structure in a duodenoscope fixing device of the present invention; Figure 4 It is a structural schematic diagram of a double-balloon structure of another embodiment of the duodenoscope fixing device of the present invention; Figure 5 is a cross-sectional view of a double-balloon structure of another embodiment of the duodenoscope fixing device of the present invention; Figure 6 It is a structural schematic diagram of the inflation and deflation structure in the duodenoscope fixing device of the present invention; Figure 7 It is a partial cross-sectional view of the inflation and deflation structure in the duodenoscope fixing device of the present invention.

[0033] Reference numerals include: Double balloon structure 1, inner balloon 11, outer balloon 12, partition 13, ring 14, clasp 15, tether portion 151, fixed balloon 16, connecting ring 17, connecting portion 171, duodenoscope 2, trachea 3, inflation and deflation structure 4, bellows 41, limit plate 42, slide rod 43, button 44, pressure rod 45, push rod 46, partition 47, fixed shaft 48, mounting shell 49, shielding groove 491, clamp arm 5. DETAILED DESCRIPTION

[0034] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0035] In the description of the present application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0036] Example 1 See also Figure 1As shown, this embodiment discloses a duodenoscope fixing device, including a double-balloon structure 1 detachably connected to the outside of the scope body, the double-balloon structure 1 is installed on the scope body of the duodenoscope 2 near the front end, the double-balloon structure 1 is used to fix the scope body in the duodenum, and to adjust the fixing position on the scope body in the duodenum according to the patient's anatomical structure to ensure the fixing effect of the scope body.

[0037] For details, see Figure 2 and Figure 3 As shown, the double balloon structure 1 includes two fixed balloons 16 arranged at different distances from the front end of the duodenoscope, and a connecting ring 17 matching the size of the mirror body is provided between each fixed balloon 16 and the mirror body. In the present invention, the connecting ring 17 can be visible under X-ray fluoroscopy. The inner side of the fixed balloon 16 is fixed to the connecting ring 17, one side of the connecting ring 17 is open, the mirror body is inserted from the opening of the connecting ring 17, and is fixed by the friction between the inner wall of the connecting ring 17 and the mirror body, and the two ends of the opening are respectively fixed with connecting parts 171, and a rope is tied between the two connecting parts 171. The opening sides of the two connecting parts 171 are tightened by the rope, and the squeezing of the connecting ring 17 on the mirror body is increased, thereby increasing the friction and making the connecting ring 17 more stably fixed on the mirror body.

[0038] Furthermore, the operating handle of the duodenoscope 2 is detachably connected to an inflation and deflation structure 4, and a trachea 3 is respectively connected between the inflation and deflation structure 4 and each fixed balloon 16, and each trachea 3 is connected to the interior of the fixed balloon 16 after passing through a corresponding connecting ring 17. The inflation and deflation structure 4 can inflate or deflate each fixed balloon 16. For details, see Figure 6 and Figure 7 As shown, the inflation and deflation structure 4 includes a mounting shell 49, and clamp arms 5 are respectively installed on both sides of the mounting shell 49 through hinges, and the inflation and deflation structure 4 is clamped on the operating handle by the clamp arms 5. Since the duodenoscope 2 is operated by holding the scope body with one hand and the operating handle with the other hand, by installing the inflation and deflation structure 4 on the operating handle, the doctor can operate the inflation and deflation structure 4 on the operating handle with one hand, without frequently switching the handle and the inflation and deflation device, and the other hand can continue to stabilize the scope body.

[0039] A bellows 41 is installed in the mounting shell 49. The upper end of the bellows 41 is closed, and a limit plate 42 is fixed to the upper end. The limit plate 42 is located in the mounting shell 49. A slide bar 43 is fixed to the upper side of the limit plate 42. The slide bar 43 is slidably connected to the mounting shell 49. After the upper end of the slide bar 43 passes through the mounting shell 49, a button 44 is fixed to the upper end. The lower end of the bellows 41 is fixed to the mounting shell 49, and the lower end of the bellows 41 is connected to the trachea 3. In this embodiment, each trachea 3 connected to the fixed balloon 16 is connected to a corresponding bellows 41, and all bellows 41 are arranged in the mounting shell 49.

[0040] In the present invention, the bellows 41, the trachea 3 and the fixed balloon 16 are sealed. When the button 44 is pressed downward, the bellows 41 is compressed, the volume of the bellows 41 decreases, and the gas in the bellows 41 is pushed into the balloon through the trachea 3, and the balloon expands. When the bellows 41 is stretched, the volume of the bellows 41 increases, the air pressure of the bellows 41 decreases, and the gas in the balloon returns to the bellows 41 under the action of negative pressure, and the balloon gradually shrinks. Since the passage of the duodenum is narrow and the amount of inflation required for the balloon is small, the gas in the bellows 41 is sufficient to meet the inflation amount of the balloon. At the same time, since the bellows 41 is self-forming, the bellows 41 can maintain a specific shape after compression or stretching, and will not be deformed arbitrarily due to changes in external pressure or internal gas. In this way, there is no need to use an inlet valve or an outlet valve in conventional inflation and deflation equipment, and the equipment cost is low. In addition, the present invention utilizes the minute expansion and contraction changes of the bellows 41 to realize the expansion and contraction of the balloon. The entire operation process is simple and the control is precise, which can improve the convenience and accuracy of the operation.

[0041] Furthermore, the present embodiment is provided with two push structures, which are used to cooperate with the corresponding limit plate 42 to stretch the bellows 41. The push structure is arranged on one side of the limit plate 42, and the push structure includes a pressure rod 45, a push rod 46, and a connecting rod connected between the pressure rod 45 and the push rod 46, and the middle part of the connecting rod is rotatably connected to the mounting shell 49. Specifically, a partition 47 is arranged in the mounting shell 49, and a avoidance hole is arranged in the middle part of the partition 47 at the position corresponding to the connecting rod, and the two ends of the connecting rod pass through the avoidance hole, so that the pressure rod 45 and the push rod 46 are respectively located on both sides of the partition 47, and the push rod 46 is located on one side close to the limit plate 42 and on the lower side of the limit plate 42. A fixed shaft 48 is fixed between the two side walls of the avoidance hole, and the middle part of the connecting rod is rotatably connected to the fixed shaft 48.

[0042] In the present invention, when the bellows 41 is extended or compressed, the limit plate 42 will move up or down accordingly. The push structure in this embodiment adopts the lever principle. After the bellows 41 is compressed and the limit plate 42 moves down, by pressing the pressure rod 45 downward, the push rod 46 can quickly push the limit plate 42 upward, so that the bellows 41 is extended again. The operation is simple and convenient.

[0043] Furthermore, the mounting shell 49 has a shielding groove 491 on one side close to the pressure rod 45, and the pressure rod 45 is located in the shielding groove 491. The shielding groove 491 provided in the present invention can hide the pressure rod 45 in the shielding groove 491. This arrangement can make the overall structure smoother and more fluent, improve the aesthetics, and reduce the risk of misoperation. After the pressure rod 45 is hidden, if you want to press the pressure rod 45, you need to put your finger into the groove. This design reduces the possibility of accidental touch and can prevent the doctor from accidentally touching the pressure rod 45 and causing operational errors.

[0044] The method of using this embodiment is as follows: Before use, the inflation and deflation structure 4 is installed on the operating handle, and all the fixed balloons 16 are evenly clamped and fixed at the position of the duodenoscope 2 near the front end.

[0045] When inserting the duodenoscope, according to the distance between the patient's pylorus and the nipple, under the guidance of the X-ray image, the fixing balloon 16 with the appropriate position is selected for activation. In the present invention, in order not to affect the adjustment of the distance between the front end of the duodenoscope and the nipple, the best placement position of the fixing balloon is a section of the intestinal tube connected to the pylorus near the mouth of the upper duodenum away from the nipple. The lumen diameter of this part of the intestinal tube is large, and the duodenoscope has a large range of motion at this point.

[0046] After selecting a suitable fixing balloon 16, the fixing balloon 16 is inflated so that the scope body and the double-balloon structure 1 are fixed in the duodenum as a whole. At this time, when the scope body is pulled back, the front end of the scope body will not fall out of the pylorus.

[0047] The fixed balloon 16 is fixed to the connecting ring 17, and the connection position between the fixed balloon 16 and the connecting ring 17 is a circular line. During intubation, although the outer wall of the fixed balloon 16 abuts against the inner wall of the duodenum, the connection between the mirror body and the fixed balloon 16 is a linear connection, so that the mirror body and the fixed balloon 16 can be limitedly displaced to meet the fine adjustment during intubation.

[0048] Example 2 The difference between this embodiment and embodiment 1 is that, see Figure 4 and Figure 5 As shown, the double-balloon structure 1 includes an inner balloon 11 and an outer balloon 12. The volume of the inner balloon 11 is smaller than that of the outer balloon 12. The inner balloon 11 is located on the inner side of the outer balloon 12. After the inner balloon 11 is inflated, it can be against the outer wall of the mirror body to fix the double-balloon structure 1 to the mirror body. After the outer balloon 12 is inflated, it can be against the inner wall of the duodenum to fix the double-balloon structure 1 in the duodenum. After the inner balloon 11 and the outer balloon 12 are inflated at the same time, the mirror body can be fixed in the duodenum. The double-balloon structure 1 also includes two rings 14, and the two ends of the inner balloon 11 and the outer balloon 12 are respectively fixed between the two rings 14, wherein a spacer 13 is shared between the inner balloon 11 and the outer balloon 12, and the spacer 13 is made of inelastic material. In the present invention, the ring 14 can be visible under X-ray fluoroscopy.

[0049] In the present invention, the inner balloon 11 and the outer balloon 12 adopt this inner and outer surrounding structure, which can make the double balloon structure 1 more compact, reduce the volume of the overall structure, and make it easier to pass through the narrow passage of the duodenum. In addition, a non-elastic material barrier 13 is used between the inner and outer balloons. The non-elastic material barrier 13 can not be deformed when the inner balloon 11 or the outer balloon 12 is inflated, so as to avoid mutual interference between the inner and outer balloons. This arrangement, on the one hand, can ensure that the inner and outer balloons can be evenly expanded when inflated or deflated, avoiding uneven expansion caused by mutual squeezing, affecting the accuracy of the operation, and on the other hand, it can avoid that when the outer balloon 12 is pressed against the intestinal wall, the common layer is deformed due to the deflation of the inner balloon 11, which affects the contact effect between the outer balloon 12 and the intestinal wall.

[0050] Furthermore, the double-balloon structure 1 further includes two clasps 15 detachably connected to the lens body, with a distance between the two clasps 15, and the inner and outer balloons 12 are located between the two clasps 15. The two clasps 15 can abut against the sleeve 14 to further prevent the inner and outer balloons 12 from falling out of the lens body. One side of the clasp 15 is open for the lens body to be inserted into, and both ends of the opening of the clasp 15 are provided with tether parts 151, and a rope is tied between the two tether parts 151 to tighten the opening.

[0051] In the present invention, the clamping ring 15 is fixed to the mirror body. By setting the clamping ring 15, on the one hand, when the relative position of the double-balloon structure 1 and the mirror body is adjusted, the inner and outer balloons 12 can be prevented from escaping from the mirror body, thereby preventing the mirror body from escaping from the inner and outer balloons 12 and escaping from the pylorus; on the other hand, since the channel diameter of the pylorus is relatively small, during the insertion of the mirror, the friction between the inner balloon 11 and the outer wall of the mirror can ensure that the inner and outer balloons 12 can smoothly enter the duodenum. By setting the clamping ring 15, even if the inner and outer balloons 12 can be placed on the clamping ring 15, it is ensured that the inner and outer balloons 12 can smoothly enter the duodenum, so as to stabilize the mirror body later.

[0052] The method of using this embodiment is as follows: Before use, install the inflation and deflation structure 4 on the operating handle, insert the inner and outer balloons 12 into the duodenoscope 2 near the front end, inflate the inner balloon 11, fix the inner and outer balloons 12 to the body, and clamp the two clamping rings 15 at the appropriate position of the body.

[0053] When inserting the endoscope, the inner and outer balloons 12 are sent into the duodenum together with the endoscope body. After the inner and outer balloons 12 reach the corresponding position, that is, between the pylorus and the papilla, the outer balloon 12 is inflated to fix the endoscope body and the inner and outer balloons 12 in the duodenum as a whole. At this time, the endoscope body is pulled back to make it as close to the lesser curvature of the stomach as possible.

[0054] During intubation, the inner balloon 11 is deflated, and the double balloon structure 1 and the mirror body can slide relative to each other. At this time, by adjusting the relative positions of the inner and outer balloons 12 and the mirror body, the front end of the mirror body is located near the nipple for easy catheter insertion, which is flexible and convenient to use.

[0055] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A duodenoscope fixing device, characterized in that: It includes a double-balloon structure that is detachably connected to the outside of the scope body. The double-balloon structure is used to stabilize the scope body in the duodenum according to the patient's anatomical structure. The double-balloon structure has moderate sliding properties during intubation.

2. The duodenoscope fixing device according to claim 1, characterized in that: The double-balloon structure includes two fixed balloons arranged at different distances from the front end of the duodenoscope. A connecting ring is provided between each fixed balloon and the mirror body. The connecting ring is detachably connected to the mirror body. The inner side of the fixed balloon is fixed to the connecting ring. Each fixed balloon is connected to a trachea.

3. The duodenoscope fixing device according to claim 2, characterized in that: One side of the connecting ring is open, and connecting parts are respectively fixed at both ends of the opening, and a rope is tied between the two connecting parts.

4. The duodenoscope fixing device according to claim 1, characterized in that: The double-balloon structure includes an inner balloon detachably connected to the mirror body, an outer balloon is provided on the outside of the inner balloon, a partition is shared between the inner balloon and the outer balloon, the volume of the inner balloon is smaller than the volume of the outer balloon, and the inner balloon can be pressed against the outer wall of the mirror body after being inflated to fix the double-balloon structure to the mirror body. The outer balloon can be pressed against the inner wall of the duodenum after being inflated, and the inner balloon and the outer balloon are respectively connected to a trachea.

5. The duodenoscope fixing device according to claim 4, characterized in that: The double-balloon structure also includes two clamping rings detachably connected to the mirror body, with a distance between the two clamping rings, and the inner and outer balloons are located between the two clamping rings. The two clamping rings are used to prevent the inner and outer balloons from falling off the mirror body.

6. The duodenoscope fixing device according to claim 2 or 4, characterized in that: It also includes an inflation and deflation structure that is detachably connected to the duodenoscope operating handle, the inflation and deflation structure is connected to the trachea, and the inflation and deflation structure is used to inflate or deflate the double balloons respectively.

7. The duodenoscope fixing device according to claim 6, characterized in that: The inflation and deflation structure includes a mounting shell, in which a bellows is arranged, the upper end of the bellows is closed and fixed with a sliding rod, the sliding rod is slidably connected to the mounting shell, the upper end of the sliding rod passes through the mounting shell and a button is fixed at the passing end, and the lower end of the bellows is fixed to the mounting shell and connected to the air pipe.

8. The duodenoscope fixing device according to claim 7, characterized in that: A limiting plate is fixed at the upper end of the bellows, and a pushing structure is provided on one side of the limiting plate. The pushing structure includes a pressure rod, a push rod, and a connecting rod connected between the pressure rod and the push rod. The middle part of the connecting rod is rotatably connected to the mounting shell, and the push rod can push the limiting plate upward by pressing the pressure rod downward.

9. The duodenoscope fixing device according to claim 8, characterized in that: A partition is arranged in the installation shell, and an avoidance hole is arranged in the middle of the partition at a position corresponding to the connecting rod, and the pressure rod and the support rod are respectively located on both sides of the partition.

10. The duodenoscope fixing device according to claim 8, characterized in that: The installation shell is provided with a shielding groove on one side close to the pressure rod, and the pressure rod is located in the shielding groove.

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