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 sleeve and a guide sleeve, an inlet is arranged on one side of the guide sheath body, a channel is arranged in the guide sheath body, and a transition cambered surface is arranged between the channel and the inlet; a guide sheath tube; the connector component comprises a butt joint part and a rotating part, the guiding sheath tube is arranged on the side, away from the rotating part, of the butt joint part, a plurality of elastic pieces capable of elastically and constantly abutting against the transition cambered surface are arranged on the side, away from the butt joint part, of the rotating part, and a groove is formed in the outer side of the rotating part; and the limiting part is detachably connected with the guide sheath body and is used for blocking and limiting the butt joint part through the groove. When the guide sheath used for assisting the choledochoscope in entering and exiting from the biliary tract is used in cooperation with the choledochoscope, the angle adjustment requirement of the choledochoscope can be met, the guide sheath tube can be kept still, the situation that the guide sheath tube hurts the interior of the human body is avoided, and the guide sheath used for assisting the choledochoscope in entering and exiting from the biliary tract can be applied to a gall-stone operation.

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, the guide sheath needs to establish a channel for the choledochoscope to enter and exit. In the prior art, there are guide sheaths that can be used with endoscopic instruments in the urology and respiratory departments. The structural components include a guide sheath body and a guide sheath tube, and a channel for the endoscopic instrument to be inserted is provided on the guide sheath body. In order to allow such a guide sheath to be also used in the bile duct and allow medical staff to observe the situation around the surgical site of bile duct stones, it is necessary to allow the bile duct endoscope used in bile duct stone surgery to be able to adjust the angle. However, due to the limitation of the internal space of the human body, when the guide sheath and the bile duct endoscope are rotated as a whole, the guide sheath tube is easy to touch the internal organs and cause damage. Therefore, it is necessary to allow the guide sheath tube and the guide sheath body to rotate. In this way, it can be ensured that the guide sheath tube is stationary. Rotating the guide sheath body can allow the bile duct endoscope to rotate, thereby providing convenience for medical staff to operate. For this reason, a guide sheath for assisting the bile duct endoscope 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 to enter and exit the bile duct, which solves the technical problems that the guide sheath body and the guide sheath tube in the existing guide sheath cannot be rotated and adjusted, and the guide sheath cannot meet the adjustment angle of the choledochoscope when used in conjunction with the choledochoscope, and the guide sheath tube does not cause damage to the human body.

[0006] The utility model solves the above technical problems with the following technical solutions: A guide sheath for assisting a choledochoscope in entering and exiting the bile duct, comprising:

[0007] A guide sheath body, one side of which is provided with an inlet, and a channel is provided in the guide sheath body, and a transition arc surface is provided between the channel and the inlet;

[0008] Introducing sheath;

[0009] The joint component comprises a docking portion and a rotating portion, wherein the guide sheath is arranged on a side of the docking portion away from the rotating portion, a plurality of spring sheets capable of elastically and permanently abutting against the transition arc surface are arranged on the side of the rotating portion away from the docking portion, and a groove is arranged on the outer side of the rotating portion;

[0010] The limiting component is detachably connected to the guide sheath body and blocks and limits the joint component through the groove.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, a positioning portion is provided on the outer side of the rotating portion for providing a positioning reference for the clamping of the joint component.

[0013] Furthermore, the guide sheath body is provided with an insertion cavity connected to the inlet, and the limiting component includes an insertion strip and a top cap, wherein the top cap is fixed on the insertion strip, and after the connector component is inserted into the guide sheath body, the insertion strip is inserted from the insertion cavity, so that the insertion strip can block and limit the connector component through the groove.

[0014] Furthermore, the insertion strip is composed of two groups of insertion strips and one group of fitting strips, the two groups of insertion strips are integrally connected to the bottom of the fitting strip, and the top cap is fixed on the fitting strip.

[0015] Furthermore, the limiting component includes a blocking block, a stud and a screw cap, wherein the blocking block and the screw cap are connected via the stud, and the stud is threadedly connected to the guide sheath body, and a chamber is opened on the inner wall of the guide sheath body to provide a lifting space for the blocking block.

[0016] Furthermore, the blocking block is hemispherical.

[0017] Furthermore, the docking portion is in the shape of a stepped shaft.

[0018] Furthermore, the guide sheath body has a negative pressure connector and an instrument connector. The negative pressure connector is integrally connected to the guide sheath body and communicates with the channel. The instrument connector is arranged on a side of the guide sheath body away from the guide sheath tube.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0020] The guide sheath for assisting a choledochoscope in entering and exiting the bile duct can satisfy the adjustment angle of the choledochoscope when used in conjunction with the choledochoscope, and the guide sheath can remain stationary, thereby avoiding damage to the human body caused by the guide sheath, so that the guide sheath for assisting a choledochoscope in entering and exiting the bile duct can be used in gallstone surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A 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;

[0022] Figure 2 for Figure 1 A structural diagram from another perspective;

[0023] Figure 3 It is a structural schematic diagram of a connecting rod and its connection structure in an embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the driving component and its connection structure in the embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure in which the stop assembly, the connecting rod and the guide carriage are three groups in an embodiment of the utility model;

[0026] Figure 6 for Figure 3 A partial enlarged schematic diagram of the middle A area;

[0027] Figure 7 for Figure 3 A partial enlarged schematic diagram of area A in the middle.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Guide sheath body; 11. Inlet; 12. Channel; 13. Transition arc surface; 14. Insertion cavity; 15. Chamber; 16. Negative pressure joint; 17. Instrument joint; 2. Guide sheath tube; 3. Joint component; 31. Docking part; 32. Rotating part; 33. Shrapnel; 34. Groove; 35. Positioning part; 4. Limiting component; 41. Insertion strip; 42. Top cap; 43. Blocking block; 44. Stud; 45. Screw cap. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, a guide sheath for assisting a choledochoscope to enter and exit the bile duct comprises a guide sheath body 1, a guide sheath tube 2, a joint component 3 and a limiting component 4, wherein the guide sheath body 1 and the guide sheath tube 2 are connected via the joint component 3, and the joint component 3 is rotatably and detachably connected to one side of the guide sheath body 1, and the limiting component 4 is used to block and limit the joint component 3 so that the joint component 3 will not be separated from the guide sheath body 1.

[0032] It should be noted that an inlet 11 is provided on one side of the guide sheath body 1, and a channel 12 is provided in the guide sheath body 1, the inlet 11 is connected to the channel 12, and the diameter of the inlet 11 is smaller than the minimum diameter of the channel 12, and the guide sheath body 1 has a negative pressure joint 16 and an instrument joint 17, the negative pressure joint 16 is integrally connected to the guide sheath body 1 and is connected to the channel 12, and the negative pressure joint 16 is preferably inclined, and its lower part is inclined toward the guide sheath tube 2 for liquid to flow out, and the instrument joint 17 is assembled and arranged on the side of the guide sheath body 1 away from the guide sheath tube 2, and the instrument joint 17 has a space for providing spatial support for the insertion and extension of the choledochoscope, and the space is connected to the channel 12, and a transition arc surface 13 is arranged between the channel 12 and the inlet 11.

[0033] As the focus of this embodiment, Figure 4-6 As shown, the joint component 3 includes a docking portion 31 and a rotating portion 32, wherein the docking portion 31 and the rotating portion 32 are integrally connected, the docking portion 31 is used to dock with the guide sheath 2, and the docking portion 31 is preferably in the shape of a stepped shaft, the guide sheath 2 is assembled and arranged on the side of the docking portion 31 away from the rotating portion 32, and the diameter of the rotating portion 32 is equal to the diameter of the inlet 11, so that the rotating portion 32 can be used to be installed in the inner side of the inlet 11 of the guide sheath body 1, and a plurality of spring pieces 33 that can elastically and permanently abut against the transition arc surface 13 are integrally connected and arranged on the side of the rotating portion 32 away from the docking portion 31, so that the joint component 3 can dock with the guide sheath The guide sheath 2 and the guide sheath body 1 form a rotatable relationship, and under normal circumstances, due to the abutment of the spring piece 33, it can limit its random rotation, and meet the demand for a rotatable design between the guide sheath 2 and the guide sheath body 1. In this way, when the guide sheath for assisting the choledochoscope in and out of the bile duct is used in conjunction with the choledochoscope, it can not only meet the adjustment angle of the choledochoscope, but also the guide sheath 2 can remain stationary to avoid damage to the human body caused by the guide sheath 2, and a groove 34 is provided on the outer side of the rotating portion 32, the cross-section of the groove 34 is hemispherical, and this groove 34 is used in conjunction with the limiting component 4, so that the limiting component 4 can block and limit the joint component 3 through the groove 34.

[0034] To facilitate the assembly of the rack joint component 3, further, as Figure 6 As shown, a positioning portion 35 is integrally connected to the outer side of the rotating portion 32 for providing a positioning reference for the clamping of the joint component 3. The positioning portion 35 is umbrella-shaped, and the inner contour of the positioning portion 35 is matched with the outer contour of the entrance 11 of the guide sheath body 1, and the maximum diameter of the positioning portion 35 is larger than the diameter of the rotating portion 32. During assembly, when the inner contour of the positioning portion 35 fits with the outer contour of the entrance 11 of the guide sheath body 1, it indicates that the rotating portion 32 has been assembled in place.

[0035] The design of the limiting component 4 adopts a detachable setting, which means that the limiting component 4 and the guide sheath body 1 are detachably connected. For easy understanding, the present application provides two detachable structures between the limiting component 4 and the guide sheath body 1.

[0036] In one embodiment, if Figure 3 As shown, the guide sheath body 1 is provided with an insertion cavity 14 connected to the inlet 11, and the limiting component 4 includes an insertion strip 41 and a top cap 42, wherein the top cap 42 is fixed on the insertion strip 41. After the connector component 3 is inserted into the guide sheath body 1, the insertion strip 41 is inserted from the insertion cavity 14, so that the insertion strip 41 can block and limit the connector component 3 through the groove 34.

[0037] To further explain, the insertion strip 41 is composed of two groups of insertion strips and one group of fitting strips. The two groups of insertion strips are integrally connected to the bottom of the fitting strip, and the top cap 42 is fixed on the fitting strip.

[0038] In this way, when the bottom of the two sets of insertion strips are inserted into the groove 34, the insertion strips form a blocking limit for the rotating part 32. The blocking here will not affect the normal rotation requirements of the joint component 3, and when the fluid accumulated in the hand is extracted, the blocking design here can limit the joint component 3 from falling off. In this way, when the guide sheath for assisting the choledochoscope in and out of the bile duct is used in conjunction with the choledochoscope, it can meet the adjustment angle of the choledochoscope, and the guide sheath tube 2 can remain motionless, thereby avoiding damage to the human body by the guide sheath tube 2.

[0039] In another embodiment, if Figure 7 As shown, the limiting component 4 includes a blocking block 43, a stud 44 and a screw cap 45, wherein the blocking block 43 and the screw cap 45 are connected through the stud 44, and the stud 44 is threadedly connected to the guide sheath body 1, and a chamber 15 is opened on the inner wall of the guide sheath body 1 to provide a lifting space for the blocking block 43, and the blocking block 43 is hemispherical.

[0040] In this way, after the connector component 3 is installed into the guide sheath body 1, since the stud 44 and the guide sheath body 1 are threadedly connected, the screw cap 45 is rotated to allow the stud 44 and the blocking block 43 to descend until the blocking block 43 is located in the groove 34. The blocking block 43 can form a blocking limit for the rotating part 32. Similarly, the blocking here will not affect the normal rotation requirements of the connector component 3, and when the accumulated fluid in the hand is extracted, the blocking design here can limit the connector component 3 from falling off. In this way, when the guide sheath for assisting the choledochoscope in and out of the bile duct is used in conjunction with the choledochoscope, the adjustment angle of the choledochoscope can be met, and the guide sheath tube 2 can remain stationary, thereby avoiding damage to the internal organs of the human body by the guide sheath tube 2.

[0041] To sum up, after assembly, when medical staff operate, by holding the docking part 31, rotating the guide sheath body 1 can drive it to rotate when the choledochoscopic endoscope is used, thereby satisfying the adjustment angle of the choledochoscopic endoscope, and the guide sheath tube 2 can remain stationary, avoiding damage to the internal body of the human body by the guide sheath tube 2.

[0042] 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: include: A guide sheath body (1) is provided with an inlet (11) on one side thereof, a channel (12) is provided in the guide sheath body (1), and a transition arc surface (13) is provided between the channel (12) and the inlet (11); Introducing sheath (2); A joint component (3), comprising a docking portion (31) and a rotating portion (32), wherein the guide sheath tube (2) is arranged on a side of the docking portion (31) away from the rotating portion (32), a plurality of spring sheets (33) capable of elastically and permanently abutting against the transition arc surface (13) are arranged on the side of the rotating portion (32) away from the docking portion (31), and a groove (34) is provided on the outer side of the rotating portion (32); A limiting component (4) is detachably connected to the guide sheath body (1) and blocks and limits the joint component (3) through the groove (34).

2. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 1, characterized in that: A positioning portion (35) is provided on the outer side of the rotating portion (32) for providing a positioning reference for clamping the joint component (3).

3. A guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 2, characterized in that: The guide sheath body (1) is provided with an insertion cavity (14) which is in communication with the inlet (11); the limiting component (4) comprises an insertion strip (41) and a top cap (42); the top cap (42) is fixed to the insertion strip (41); after the joint component (3) is inserted into the guide sheath body (1), the insertion strip (41) is inserted from the insertion cavity (14), so that the insertion strip (41) can block and limit the joint component (3) through the groove (34).

4. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 3, characterized in that: The insertion strip (41) is composed of two groups of insertion strips and one group of fitting strips. The two groups of insertion strips are integrally connected to the bottom of the fitting strip, and the top cap (42) is fixed on the fitting strip.

5. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 2, characterized in that: The limiting component (4) comprises a blocking block (43), a stud (44) and a screw cap (45), wherein the blocking block (43) and the screw cap (45) are connected via the stud (44), and the stud (44) is threadedly connected to the guide sheath body (1), and a chamber (15) is provided on the inner wall of the guide sheath body (1) to provide a lifting space for the blocking block (43).

6. A guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 5, characterized in that: The blocking block (43) is hemispherical.

7. The guide sheath for assisting a choledochoscope to enter and exit the bile duct according to claim 1, characterized in that: The butt joint (31) is in the shape of a stepped shaft.

8. The guide sheath for assisting a choledochoscope in entering and exiting the bile duct according to claim 7, characterized in that: The guide sheath body (1) comprises a negative pressure connector (16) and an instrument connector (17); the negative pressure connector (16) is integrally connected to the guide sheath body (1) and communicates with the channel (12); the instrument connector (17) is arranged on a side of the guide sheath body (1) away from the guide sheath tube (2).

Images