Outer sheath tube of endoscope

Abstract

The utility model relates to the technical field of medical instruments, and discloses an outer sheath tube of an endoscope, the outer sheath tube comprises a main body section, a transition section and an expansion section which are sequentially connected from front to back, the outer diameter of the main body section is smaller than that of the expansion section, a main body channel is arranged in the main body section, and an expansion channel communicated with the main body channel is arranged in an expansion part. The outer diameter of the main body section is smaller than that of the expansion section, so that the front end of the outer sheath tube can enter a human body conveniently, the main body section is smoothly connected with the expansion section through the transition section, and the situation that when the outer sheath tube enters, the joint of the main body section and the expansion section hurts the human body is prevented; on one hand, the suction pressure at the front end of the main body section can be ensured, on the other hand, when large broken stone is sucked, the broken stone can be output out of the outer sheath tube through the expansion channel only by pulling the front end of the endoscope tube to the expansion channel, the endoscope tube does not need to be completely pulled out of the outer sheath tube, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an external sheath of an endoscope. Background Technology

[0002] In recent years, with the development of medical technology and science, a brand-new treatment method has emerged in the medical field—minimally invasive treatment, a completely new treatment concept. Medical endoscopes are mainly used in surgical procedures and routine medical examinations. Compared with traditional surgery, the functional minimally invasive surgical techniques of medical endoscopes have been widely accepted by doctors and patients. Medical endoscopes utilize the body's natural openings or, when necessary, several small openings. As long as the doctor skillfully inserts the endoscope lens into the body, they can perform closed surgical procedures inside the body from outside the body through other surgical instruments and a camera display system.

[0003] Urological endoscopes are commonly used in surgeries to remove stones. To facilitate the removal of foreign objects (such as broken kidney stones or small pieces of removed tissue), some endoscopes include a tube, an inner sheath, and an outer sheath. During use, the inner sheath is first locked to the tube, and then the outer sheath is locked to the inner sheath. After locking, the tube, inner sheath, and outer sheath are inserted together into the patient's body. The locking mechanism on the outer and inner sheaths is then released, and the tube and inner sheath are withdrawn from the body, leaving the outer sheath inside, forming a rigid entry channel. The tube is then reinserted into the outer sheath, creating a suction channel between them. This suction channel connects to a negative pressure suction system via a three-way connector, allowing the broken stones to be suctioned away through this channel under the influence of the negative pressure system.

[0004] However, in actual use, because the gap between the endoscope tube and the outer sheath is small, when the fragments are large, the endoscope tube needs to be completely pulled out of the outer sheath to suck out the larger fragments. Therefore, the endoscope tube needs to be frequently pulled out and inserted into the outer sheath. Each time it is inserted, the endoscope tube and the outer sheath must be aligned. Moreover, during the insertion process, the front end of the endoscope tube is prone to bending, which is inconvenient to use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an outer sheath of an endoscope that can suck out larger stones without having to completely pull the endoscope tube out of the outer sheath during use, making it easy to use.

[0006] To solve the above-mentioned technical problems, this utility model provides an external sheath tube for an endoscope. The external sheath tube includes a main body section, a transition section, and an expansion section connected sequentially from front to back. The main body section is smoothly connected to the expansion section through the transition section. The outer diameter of the main body section is smaller than the outer diameter of the expansion section. The main body section has a main channel inside, and the expansion section has an expansion channel communicating with the main channel inside. The aperture of the main channel is smaller than the aperture of the expansion channel.

[0007] As a preferred embodiment of this utility model, the transition section is in the shape of a truncated cone, and the diameter of the transition section gradually increases from front to back.

[0008] As a preferred embodiment of this utility model, a guide opening is provided between the rear end of the main channel and the front end of the expansion channel, and the diameter of the guide opening gradually increases from front to back.

[0009] As a preferred embodiment of this utility model, the outer sheath tube further includes a three-way connector, which has a first interface, a second interface and a third interface that are interconnected. The first interface is fixedly connected to the rear end of the expansion section. The first interface and the second interface are arranged opposite to each other. The second interface and the first interface allow the inner sheath tube of the endoscope to pass through sequentially. The third interface is used to connect to a negative pressure suction system.

[0010] As a preferred embodiment of this utility model, the second interface is provided with a locking component for locking with the inner sheath of the endoscope.

[0011] As a preferred embodiment of this utility model, one side of the three-way connector is provided with an adjusting tube that communicates with the first interface, the second interface and the third interface respectively. The side of the adjusting tube is provided with an arc-shaped through hole arranged around the axis of the adjusting tube. The adjusting tube is covered with a valve cover that is rotatably connected to the adjusting tube. The inner side of the valve cover is provided with an arc-shaped groove arranged around the axis of the adjusting tube, and the bottom of the arc-shaped groove penetrates through the bottom of the valve cover.

[0012] As a preferred embodiment of this utility model, the third interface is connected to a connecting pipe for connecting to a negative pressure suction system, and a filter bottle is provided on the connecting pipe.

[0013] As a preferred embodiment of this utility model, a sealing ring is installed inside the second interface, which can cooperate with the inner sheath or tube of the endoscope to seal.

[0014] This utility model provides an external sheath for an endoscope. Compared with the prior art, its advantages are as follows: the outer diameter of the main body section of the external sheath is smaller than that of the expansion section, which facilitates the entry of the front end of the external sheath into the human body. The main body section is smoothly connected to the expansion section through a transition section, preventing damage to the human body at the connection between the main body section and the expansion section when the external sheath enters. The aperture of the expansion channel is larger than that of the main body section. On the one hand, it can ensure the suction pressure at the front end of the main body section. On the other hand, when suctioning larger stones, it is only necessary to pull the front end of the endoscope tube away from the expansion channel, and the stones can be output to the outside of the external sheath through the expansion channel without having to completely pull the endoscope tube out of the external sheath, which is convenient for operation. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 yes Figure 1 A magnified view of a portion of point A;

[0017] Figure 3 This is a schematic diagram of the structure between the main channel and the expansion channel of this utility model;

[0018] Figure 4 This is a cross-sectional view of the tee connector of this utility model;

[0019] Figure 5 This is a broken diagram of the connection structure between the valve cover and the regulating pipe of this utility model;

[0020] Figure 6 This is a structural diagram of the locking component of this utility model;

[0021] Figure 7 This is a structural diagram of the inner sheath tube that cooperates with the locking component of this utility model;

[0022] In the diagram, 1. Outer sheath; 11. Main body section; 111. Main body channel; 12. Transition section; 121. Guide port; 13. Expansion section; 131. Expansion channel; 2. T-joint; 21. First interface; 22. Second interface; 221. Sealing ring; 23. Third interface; 231. Connecting pipe; 232. Filter bottle; 3. Adjusting pipe; 31. Arc-shaped through hole; 4. Valve cover; 41. Arc-shaped groove; 5. Locking assembly; 51. Sleeve; 52. Inner core; 521. Locking platform; 6. Inner sheath; 61. Locking sleeve; 611. Locking groove. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] like Figure 1-7 As shown, a preferred embodiment of the present invention provides an endoscope with an outer sheath 1, including an outer sheath 1 and a three-way connector 2. The outer sheath 1 includes a main body section 11, a transition section 12, and an expansion section 13 connected sequentially from front to back. The main body section 11 is smoothly connected to the expansion section 13 through the transition section 12. The outer diameter of the main body section 11 is smaller than the outer diameter of the expansion section 13. The main body section 11 has a main channel 111 inside, and the expansion section 13 has an expansion channel 131 communicating with the main channel 111 inside. The aperture of the main channel 111 is smaller than the aperture of the expansion channel 131.

[0026] The working principle of this embodiment is as follows: When in use, first insert the endoscope tube into the inner sheath tube 6, then insert the inner sheath tube 6 into the outer sheath tube 1, then insert the endoscope tube and the outer sheath tube 1 together into the human body to the affected area, then withdraw the endoscope tube and the inner sheath tube 6 together from the human body, leaving the outer sheath tube 1 in the human body, and then insert the endoscope tube into the outer sheath tube 1 again. At this time, a suction channel is formed between the endoscope tube and the outer sheath tube 1, and this suction channel is connected to the negative pressure suction system to suction the lithotripsy.

[0027] The outer diameter of the main body section 11 of the outer sheath 1 is smaller than that of the expansion section 13, which facilitates the entry of the front end of the outer sheath 1 into the human body. The main body section 11 is smoothly connected to the expansion section 13 through the transition section 12, which prevents damage to the human body at the connection between the main body section 11 and the expansion section 13 when the outer sheath 1 is inserted. The aperture of the expansion channel 131 is larger than that of the main body section 11. On the one hand, it can ensure the suction pressure at the front end of the main body section 11. On the other hand, when suctioning larger stones, it is only necessary to pull the front end of the endoscope into the expansion channel 131, and the stones can be output to the outside of the outer sheath 1 through the expansion channel 131 without having to completely pull the endoscope out of the outer sheath 1, which is convenient to use.

[0028] For example, the transition section 12 is truncated cone-shaped, and the diameter of the transition section 12 gradually increases from front to back. Generally, the outer diameter of the front end of the transition section 12 is consistent with the outer diameter of the main body section 11, and the outer diameter of the rear end of the transition section 12 is consistent with the outer diameter of the expansion section 13, thereby achieving a smooth transition between the main body section 11 and the expansion section 13.

[0029] For example, a guide port 121 is provided between the rear end of the main channel 111 and the front end of the expansion channel 131. The diameter of the guide port 121 gradually increases from front to back. Generally, the diameter of the front end of the guide port 121 is the same as the diameter of the rear end of the main channel 111, and the diameter of the rear end of the guide port 121 is the same as the diameter of the front end of the expansion channel 131. When the endoscope tube passes through the expansion channel 131 and extends to the guide port 121, the guide port 121 can play a guiding role, which facilitates the insertion of the endoscope tube into the main channel 111, thereby facilitating the insertion of the endoscope tube into the outer sheath tube 1.

[0030] For example, the outer sheath 1 also includes a three-way connector 2. The three-way connector 2 has a first interface 21, a second interface 22 and a third interface 23 that are interconnected. The first interface 21 is fixedly connected to the rear end of the expansion section 13. The first interface 21 and the second interface 22 are arranged opposite to each other. The second interface 22 and the first interface 21 allow the inner sheath 6 of the endoscope to pass through in sequence. The third interface 23 is used to connect with the negative pressure suction system. The three-way connector 2 is fixed to the rear end of the outer sheath 1 and does not require additional assembly, making it convenient to use. In use, the inner sheath 6 can be inserted into the outer sheath 1 by passing the second interface 22 and the first interface 21 in sequence. The suction channel between the inner sheath 6 and the endoscope tube can be connected to the negative pressure suction system via the third interface 23.

[0031] For example, the second interface 22 is provided with a locking component 5 for locking with the inner sheath 6 of the endoscope. It can be understood that the inner sheath 6 of the endoscope has a structure that cooperates with the locking component 5, so that the outer sheath 1 is locked onto the inner sheath 6. Specifically, in this embodiment, a sleeve 51 is fixed in the second interface 22, and a rotating inner core 52 is rotatably connected to the sleeve 51. The rotating inner core 52 extends radially toward the axis of the sleeve 51 with a locking platform 521. The inner sheath 6 is provided with a locking sleeve 61 that matches the inner hole of the sleeve 51. The outer wall of the locking sleeve 61 is provided with a locking groove 611. In use, the inner sheath 6 passes through the second interface 22, so that the locking sleeve 61 is inserted into the sleeve 51. Then the rotating inner core 52 is rotated so that the locking platform 521 is locked into the locking groove 611. The outer sheath 1 is then locked onto the inner sheath 6 by the locking component. Furthermore, the rotating inner core 52 is also provided with a lever for easier operation.

[0032] For example, one side of the three-way connector 2 is provided with an adjusting tube 3 that communicates with the first interface 21, the second interface 22 and the third interface 23 respectively. That is, the adjusting tube 3 communicates with the interior of the three-way connector 2. The side of the adjusting tube 3 is provided with an arc-shaped through hole 31 arranged around the axis of the adjusting tube 3. The upper cover of the adjusting tube 3 is provided with a valve cover 4 that is rotatably connected to the adjusting tube 3. That is, the inner hole of the valve cover 4 is rotatably engaged with the adjusting tube 3. The inner side of the valve cover 4 is provided with an arc-shaped groove 41 arranged around the axis of the adjusting tube 3. The bottom of the arc-shaped groove 41 penetrates the bottom of the valve cover 4. The valve cover 4 can rotate so that the arc-shaped groove 41 communicates with the arc-shaped through hole 31. At this time, the interior of the adjusting tube 3 communicates with the outside through the arc-shaped through hole 31 and the arc-shaped groove 41. When the third interface 23 is connected to the negative pressure suction system, the relative position of the arc-shaped groove 41 and the arc-shaped through hole 31 can be adjusted by rotating and adjusting the opening of the arc-shaped through hole 31, thereby adjusting the suction force at the first interface 21.

[0033] For example, the third interface 23 is connected to a connecting pipe 231 for connection to a negative pressure suction system. The connecting pipe 231 is equipped with a filter bottle 232, so that foreign objects (such as broken kidney stones or cut-off micro-tissues) are transported through the connecting pipe 231 to the filter bottle 232 for easy collection and processing.

[0034] For example, the second interface 22 is equipped with a sealing ring 221 that can cooperate with the inner sheath or tube of the endoscope to seal, ensuring that the pressure inside the outer sheath does not leak during the process of pulling the tube out under negative pressure suction.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An external sheath of an endoscope, characterized in that: The outer sheath includes a main body section, a transition section, and an expansion section connected sequentially from front to back. The main body section is smoothly connected to the expansion section through the transition section. The outer diameter of the main body section is smaller than the outer diameter of the expansion section. The main body section has a main channel inside, and the expansion section has an expansion channel communicating with the main channel inside. The aperture of the main channel is smaller than the aperture of the expansion channel.

2. The outer sheath of the endoscope according to claim 1, characterized in that: The transition section is truncated cone-shaped, and its diameter gradually increases from front to back.

3. The outer sheath of the endoscope according to claim 1, characterized in that: A guide opening is provided between the rear end of the main channel and the front end of the expansion channel, and the diameter of the guide opening gradually increases from front to back.

4. The outer sheath of the endoscope according to claim 1, characterized in that: It also includes a three-way connector, which has a first interface, a second interface and a third interface that are interconnected. The first interface is fixedly connected to the rear end of the expansion section. The first interface and the second interface are arranged opposite to each other. The second interface and the first interface allow the inner sheath of the endoscope to pass through in sequence. The third interface is used to connect to a negative pressure suction system.

5. The outer sheath of the endoscope according to claim 4, characterized in that: The second interface is provided with a locking component for engaging with the inner sheath of the endoscope.

6. The outer sheath of the endoscope according to claim 4, characterized in that: One side of the three-way connector is provided with an adjusting tube that communicates with the first interface, the second interface and the third interface respectively. The side of the adjusting tube is provided with an arc-shaped through hole arranged around the axis of the adjusting tube. The adjusting tube is covered with a valve cover that is rotatably connected to the adjusting tube. The inner side of the valve cover is provided with an arc-shaped groove arranged around the axis of the adjusting tube. The bottom of the arc-shaped groove penetrates the bottom of the valve cover.

7. The outer sheath of the endoscope according to claim 4, characterized in that: The third interface is connected to a connecting pipe for connection to a negative pressure suction system, and a filter bottle is provided on the connecting pipe.

8. The outer sheath of the endoscope according to claim 4, characterized in that: The second interface is equipped with a sealing ring that can cooperate with the inner sheath or tube of the endoscope to seal.

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