Guide sheath for assisting choledochoscope to enter and exit from biliary tract

Abstract

The utility model relates to a guide sheath for assisting a choledochoscope to enter and exit from a biliary tract, which comprises a guide sheath body, a guide sheath tube and a connector component, and the connector component is arranged on one side of the guide sheath body and detachably connected with the guide sheath tube. The connector component comprises a fixing part and a butt joint part, the fixing part and the butt joint part are integrally connected, a plurality of steps are arranged on the butt joint part, the outer diameter of the butt joint part is gradually reduced, and therefore the connector component is matched with guide sheaths with different inner diameter sizes. According to the guide sheath for assisting the choledochoscope in entering and exiting from the biliary tract, the guide sheath tubes are detachably designed and are matched with the butt joint part in the connector component, so that the guide sheath tubes of different sizes can be mounted at the butt joint part, and the requirement for follow-up matched use of choledochoscopes of different sizes can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of guide sheaths, in particular to a guide sheath for assisting a choledochoscope to enter and exit a bile duct. Background Art

[0002] Biliary stones are a common disease, and bile duct incision and choledochoscope lithotripsy are common treatment methods. Currently, choledochoscope lithotripsy can be divided into two situations. One is primary lithotripsy, that is, bile duct incision is performed through laparoscopy or open surgery, and a choledochoscope is inserted into the body from the laparoscopic chuck and further inserted into the incised bile duct to remove stones. The other is secondary lithotripsy, that is, bile duct incision is performed through laparoscopy or open surgery in the first stage, and a T-tube is left in place. After at least 1 month, a sinus will be formed at the opening of the bile duct and the skin. At this time, another operation can be performed to insert the choledochoscope into the bile duct along the sinus to remove stones.

[0003] Both of the above-mentioned surgical procedures have certain defects. In the first-stage stone removal surgery, the choledochoscope needs to be completed with the assistance of a laparoscope. The laparoscope lens is needed to observe the field of view, and the laparoscopic separation forceps are also needed to insert the choledochoscope into the bile duct. Each time a stone is removed, the above operation needs to be repeated, resulting in low efficiency of the stone removal operation. In addition, liquid perfusion is required for stone removal in the bile duct. In the first-stage surgery, because there is no sinus tract, excessive fluid in the bile duct will overflow, and a suction device is also needed under laparoscope to suck away the overflowing fluid in time. However, the flushing fluid is not easy to be removed. Due to contamination by inflamed bile duct stones, they may contain pathogens, which may cause peritonitis or other inflammation of abdominal organs if they drip into the abdominal cavity. In the second-stage stone removal surgery, although the above-mentioned problems in the first-stage surgery are avoided, there is insufficient patency of the choledochoscope when entering and exiting the sinus tract, and the outflow of flushing fluid in the sinus tract is sometimes not smooth. At the same time, it is precisely because of the above-mentioned defects in the first-stage surgery that in many cases, doctors would rather choose a second-stage surgery to reduce surgical risks and operational difficulties, but this undoubtedly increases the patient's re-trauma and medical costs.

[0004] At present, a guide sheath needs to establish a passage for the choledochoscope to enter and exit. In the prior art, there are guide sheaths that can be used with a endoscopist in the urinary system and the respiratory system. The structural components include a guide sheath body and a guide sheath tube, and a passage for the endoscopist to extend is provided on the guide sheath body. In order to enable such a guide sheath to be also used in the bile duct, the sizes of choledochoscopes required for surgery on different patients are different. Therefore, guide sheath tubes with different cross-sectional diameters are required. Therefore, a guide sheath for assisting a choledochoscope to enter and exit the bile duct is proposed. Utility Model Content

[0005] Based on the above description, the utility model provides a guide sheath for assisting a choledochoscope in entering and exiting the bile duct, which solves the technical problem that the existing guide sheath cannot adapt to guide sheath tubes with different cross-sectional diameters and cannot meet the requirements of choledochoscopes of different sizes for entering and exiting the bile duct.

[0006] The utility model solves the above technical problems with the following technical solutions: A guide sheath for assisting a choledochoscope to enter and exit the bile duct, comprising a guide sheath body, a guide sheath tube and a joint component, wherein the joint component is arranged on one side of the guide sheath body and is detachably connected to the guide sheath tube;

[0007] The connector component includes a fixing portion and a docking portion, wherein the fixing portion and the docking portion are integrally connected, and a plurality of steps are provided on the docking portion so that the outer diameter of the docking portion is gradually reduced, thereby adapting to guide sheaths with different inner diameters.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the guide sheath body is threadedly connected to the fixing portion, so that the connector component can be fixed to one end of the guide sheath body.

[0010] Furthermore, a positioning portion is integrally connected to the outer side of the fixing portion, and the maximum diameter of the positioning portion is greater than the diameter of the fixing portion.

[0011] Furthermore, the number of steps is three groups, forming contour surface one, contour surface two and contour surface three, the outer diameters of contour surface one, contour surface two and contour surface three gradually decrease, and a sleeve is threadedly connected to the outer side of contour surface two and contour surface three, and the outer diameter of the sleeve is equal to the outer diameter of contour surface one.

[0012] Furthermore, a plurality of threaded portions are arranged on the outer side of the docking portion, the number of the threaded portions being the same as the number of the steps, and an adapting thread is arranged on the inner wall of one side of the guide sheath tube, so that the guide sheath tube can be threadedly connected to the docking portion through the adapting thread.

[0013] Furthermore, it also includes adhesive tape, and the docking part and the guide sheath are fixed by the adhesive tape.

[0014] Furthermore, the guide sheath body has a negative pressure joint and an instrument joint, the negative pressure joint has a channel communicating with the inside of the guide sheath body, and the instrument joint is arranged on a side of the guide sheath body away from the guide sheath tube.

[0015] Furthermore, the negative pressure connector is arranged at an angle.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] The guide sheath used to assist the choledochoscope in entering and exiting the bile duct has a detachable design for the guide sheath tube, and cooperates with the docking part in the joint component so that guide sheath tubes of different sizes can be installed at the docking part, thus meeting the needs of subsequent coordinated use of choledochoscopes of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the structure of a guide sheath for assisting a choledochoscope in entering and exiting the bile duct provided in an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure when half cut;

[0020] Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A area;

[0021] Figure 4 It is a schematic diagram of the structure when the docking portion and the guide sheath are fixed by adhesive tape in an embodiment of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Guide sheath body; 11. Negative pressure joint; 12. Instrument joint; 2. Guide sheath tube; 3. Joint component; 31. Fixing part; 32. Docking part; 33. Positioning part; 34. Contour surface one; 35. Contour surface two; 36. Contour surface three; 37. Envelope; 38. Adhesive tape. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] like Figure 1 and Figure 2 As shown, in this embodiment, a guide sheath for assisting a choledochoscope in entering and exiting the bile duct comprises a guide sheath body 1, a guide sheath tube 2 and a connector component 3, wherein the guide sheath body 1 and the guide sheath tube 2 are prior arts and will not be elaborated herein, but it should be noted that a negative pressure connector 11 is integrally connected to the guide sheath body 1, and the negative pressure connector 11 has a channel connected to the inside of the guide sheath body 1, and the negative pressure connector 11 is preferably arranged at an angle, and its lower part is inclined toward the guide sheath tube 2 for liquid to flow out, and an instrument connector 12 is arranged on the side of the guide sheath body 1 away from the guide sheath tube 2, and the instrument connector 12 has a space channel for providing space support for the insertion and extension of the choledochoscope, and in addition, the connector component 3 is used to adapt the guide sheath tubes 2 of different inner diameters.

[0026] First, the connection relationship and position between the guide sheath body 1, the guide sheath tube 2 and the joint component 3 are described. Figure 1As shown, the connector component 3 is arranged on the right side of the guide sheath body 1, and the right side of the guide sheath body 1 is the interface end. Although the connector component 3 and the guide sheath body 1 can be directly fixed, a detachable connection relationship is preferably adopted in this embodiment. In this way, the connector component 3 can be replaced when it is damaged, and the connector component 3 and the guide sheath tube 2 are also detachably connected. In this way, the design requirements of replacing guide sheath tubes 2 with different inner diameters can be met.

[0027] For the above-mentioned detachable relationship between the joint component 3 and the guide sheath body 1 , it is further explained that the guide sheath body 1 is threadedly connected to the fixing portion 31 , so that the joint component 3 can be fixed to one end of the guide sheath body 1 .

[0028] Next, the specific structure of the joint component 3 is described. Figure 3 As shown, the connector component 3 includes a fixing portion 31 and a docking portion 32, wherein the fixing portion 31 and the docking portion 32 are integrally connected, the fixing portion 31 is located on the inner side of the right inlet of the guide sheath body 1, and the docking portion 32 is located on the outer side of the guide sheath body 1, so as to facilitate the subsequent detachable assembly of the guide sheath tube 2, and a plurality of steps are provided on the docking portion 32, so that the docking portion 32 is in the shape of a stepped shaft, and the step design allows the outer diameter of the docking portion 32 to gradually decrease, so as to adapt to guide sheath tubes 2 of different inner diameters, so as to meet the design requirements of replacing guide sheath tubes 2 of different inner diameters.

[0029] In order to understand whether the fixing part 31 is properly assembled, Figure 3 As shown, in a certain embodiment, a positioning portion 33 is integrally connected to the outer side of the fixing portion 31, the positioning portion 33 is umbrella-shaped, and the inner contour of the positioning portion 33 is adapted to the outer contour of the entrance of the guide sheath body 1, and the maximum diameter of the positioning portion 33 is larger than the diameter of the fixing portion 31. During assembly, when the inner contour of the positioning portion 33 fits the outer contour of the entrance of the guide sheath body 1, it indicates that the fixing portion 31 has been assembled in place.

[0030] In addition, it should be noted that in the present embodiment, the number of steps is preferably three groups, so that the design of the three groups of steps will form a contour surface 1 34, a contour surface 2 35 and a contour surface 36, and the outer diameters of the contour surface 1 34, the contour surface 2 35 and the contour surface 36 gradually decrease. When the guide sheath 2 is assembled on the outside of the contour surface 1 34, in order to ensure that there is no gap between the contour surface 2 35 and the contour surface 36 and the inner wall of the guide sheath 2, a sleeve 37 is threadedly connected to the outer side of the contour surface 2 35 and the contour surface 36, and the outer diameter of the sleeve 37 is equal to the outer diameter of the contour surface 1 34. In this way, there is no gap between the contour surface 2 35 and the contour surface 36 and the inner wall of the guide sheath 2. In this way, the liquid sucked out during the biliary surgery will not remain in the gap here.

[0031] The connector component 3 and the guide sheath tube 2 are also described as being detachably connected. To facilitate understanding of the detachable structure between the connector component 3 and the guide sheath tube 2, two related structures are provided herein.

[0032] In one embodiment, if Figure 3 As shown, a plurality of threaded portions are arranged on the outer side of the docking portion 32, and the number of the threaded portions is the same as the number of the steps. An adapting thread is arranged on the inner wall of one side of the guide sheath tube 2, so that the guide sheath tube 2 can be threadedly connected with the docking portion 32 through the adapting thread.

[0033] In this way, each time the docking portion 32 and the guide sheath 2 are disassembled and assembled, the guide sheath 2 can be disassembled and assembled by simply rotating. In this way, during operation, the guide sheath 2 of the corresponding inner diameter size is assembled on the outside of the contour surface 1 34, contour surface 2 35 or contour surface 36 corresponding to its size, so that the guide sheath used to assist the choledochoscope in entering and exiting the bile duct can adapt to the guide sheath 2 of different inner diameter sizes, so as to meet the subsequent use of choledochoscopes of different sizes.

[0034] In another embodiment, if Figure 4 As shown, it also includes a tape 38 , and the docking portion 32 and the guide sheath 2 are fixed by the tape 38 .

[0035] In this way, when the docking portion 32 and the guide sheath 2 are disassembled and assembled, it is only necessary to disassemble and assemble the tape 38. During the operation, the guide sheath 2 of the corresponding inner diameter size is also assembled on the outside of the contour surface 1 34, contour surface 2 35 or contour surface 36 corresponding to its size, so that the guide sheath used to assist the choledochoscope in entering and exiting the bile duct can adapt to the guide sheath 2 of different inner diameter sizes, and finally use the tape 38 to tighten it. This design may cause the tape 38 to be damaged, but it can also meet the subsequent use of choledochoscopes of different sizes.

[0036] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A guide sheath for assisting a choledochoscope in entering and exiting the bile duct, characterized in that: It comprises a guide sheath body (1), a guide sheath tube (2) and a joint component (3), wherein the joint component (3) is arranged on one side of the guide sheath body (1) and is detachably connected to the guide sheath tube (2); The connector component (3) comprises a fixing portion (31) and a docking portion (32), wherein the fixing portion (31) and the docking portion (32) are integrally connected, and a plurality of steps are provided on the docking portion (32) so that the outer diameter of the docking portion (32) gradually decreases, thereby adapting to guide sheath tubes (2) of different inner diameters.

2. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 1, characterized in that: The guide sheath body (1) is threadedly connected to the fixing portion (31), so that the joint component (3) can be fixed to one end of the guide sheath body (1).

3. A guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 2, characterized in that: A positioning portion (33) is integrally connected to the outer side of the fixing portion (31), and the maximum diameter of the positioning portion (33) is greater than the diameter of the fixing portion (31).

4. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 3, characterized in that: The number of the steps is three groups, forming a contour surface one (34), a contour surface two (35) and a contour surface three (36), the outer diameters of the contour surface one (34), the contour surface two (35) and the contour surface three (36) gradually decrease, and a sleeve (37) is threadedly connected to the outer side of the contour surface two (35) and the contour surface three (36), and the outer diameter of the sleeve (37) is equal to the outer diameter of the contour surface one (34).

5. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 4, characterized in that: The outer side of the docking portion (32) is provided with a plurality of threaded portions, the number of which is the same as the number of the steps, and the inner wall of one side of the guide sheath tube (2) is provided with an adapting thread, so that the guide sheath tube (2) can be threadedly connected to the docking portion (32) through the adapting thread.

6. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 4, characterized in that: It also includes an adhesive tape (38), and the docking portion (32) and the guide sheath tube (2) are fixed by the adhesive tape (38).

7. The guide sheath for assisting a choledochoscope to enter and exit the bile duct according to claim 1, characterized in that: The guide sheath body (1) comprises a negative pressure joint (11) and an instrument joint (12); the negative pressure joint (11) comprises a passage communicating with the interior of the guide sheath body (1); and the instrument joint (12) is arranged on a side of the guide sheath body (1) away from the guide sheath tube (2).

8. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 7, characterized in that: The negative pressure joint (11) is arranged at an angle.

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