Auxiliary connecting piece and soft endoscope auxiliary aspiration device

Abstract

The present invention discloses an auxiliary connector and a flexible endoscope-assisted suction device. The auxiliary connector includes a connector body, the rear end of which has a main channel and a secondary channel. The secondary channel is smaller than the main channel and is located to the side of the main channel. A main opening is provided at the front end of the connector body, which communicates with both the main channel and the secondary channel. In the longitudinal projection direction, the main opening is opposite to at least part of the main channel and the secondary channel, respectively. The present invention can improve the clarity of the visual field during surgery, facilitate surgical operations, and enhance safety.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and in particular relates to an auxiliary connecting piece and a flexible endoscope auxiliary suction device. Background Art

[0002] Minimally invasive gastrointestinal endoscopic surgery has the advantages of minimal trauma and high surgical efficiency, especially in the treatment of early-stage gastrointestinal tumors. Therefore, it is worth promoting and popularizing. To ensure the smooth progress of minimally invasive gastrointestinal endoscopic surgery, a clear surgical field of view is crucial. Therefore, during minimally invasive surgery, in order to achieve a good operating field of view, the surgeon needs to timely aspirate fluid or blood from the surgical site to fully expose the field of view and create a good operating space.

[0003] Currently, the endoscope used in gastrointestinal surgery has a single working channel, which serves as both a channel for endoscopic surgical accessories to enter the gastrointestinal cavity and a channel for attracting gastrointestinal cavity fluid or blood. Due to the small inner diameter of the working channel, the suction force of the endoscope is small, and it cannot efficiently attract gastrointestinal cavity fluid or blood, which seriously affects the surgical field of view, reduces the success rate of the operation and increases the risk to the patient.

[0004] Later, the applicant developed an auxiliary connector that can easily suck out liquid or blood in the gastrointestinal cavity. However, the auxiliary connector still has certain defects, which affects the field of view at the front end of the endoscope tube, poses a safety hazard, and also affects its suction efficiency when sucking viscous liquids. Summary of the Invention

[0005] The purpose of the present invention is to provide an auxiliary connecting piece and a flexible endoscope-assisted suction device, which can improve the clarity of the visual field during surgery, make surgical operations more convenient, and improve safety.

[0006] The present invention provides an auxiliary connecting piece, including a connecting body, the rear end of which has a main channel and a secondary channel, the secondary channel is smaller than the main channel, and the secondary channel is located next to the main channel, and a main opening is provided at the front end of the connecting body, and the main opening is communicated with the main channel and the secondary channel at the same time; in the longitudinal projection direction, the main opening is opposite to at least part of the area of the main channel and the secondary channel respectively.

[0007] In one embodiment, the outer wall of the connector is columnar.

[0008] In one embodiment, the outer wall of the connector is cylindrical or elliptical.

[0009] In one embodiment, the outer wall of the connector is arc-shaped or frustum-shaped.

[0010] In one embodiment, a blocking portion is provided at the front end of the connector, the blocking portion is located in the main opening, and the blocking portion is between the main channel and the secondary channel.

[0011] In one embodiment, the blocking portion is a flange, which protrudes toward the front end relative to the main channel and the secondary channel and is lower than the end edge of the main opening.

[0012] In one embodiment, the blocking portion is arc-shaped, and the concave portion of the arc-shaped blocking portion faces one side of the main channel.

[0013] In one embodiment, a concave guide surface is provided at a side position of the front end of the secondary channel.

[0014] In one embodiment, there are two flow-guiding concave surfaces, and the two flow-guiding concave surfaces are respectively located on both sides of a line connecting the centers of the main channel and the secondary channel.

[0015] In one embodiment, a spacer neck is provided between the main channel and the inner wall of the main opening, and the diameter of the spacer neck is smaller than the diameter of the main channel.

[0016] The present invention also provides a soft endoscope-assisted suction device, which includes an endoscope tube, a suction tube and an auxiliary connecting piece. The front end of the endoscope tube is inserted into the main channel and cooperates with the main channel, and the front end of the suction tube is connected to the secondary channel.

[0017] In one embodiment, an outer sleeve is further included, which wraps the endoscope tube and the suction straw at the same time.

[0018] In one embodiment, the outer sleeve includes a main body, a first channel is formed in the main body, a longitudinal side wall is attached to one side of the outer wall of the main body, and a second channel is formed between the longitudinal side wall and the outer wall of the main body; the endoscope tube is inserted into the first channel and cooperates with the inner wall of the first channel, and the suction straw is inserted into the second channel and cooperates with the inner wall of the second channel.

[0019] In one embodiment, a lens is provided at the front end of the endoscope tube, and the end edge of the main opening is within the field of view of the lens.

[0020] The present invention also provides another flexible endoscope-assisted suction device, which includes an endoscope tube, a suction tube, and an auxiliary connecting piece. A lens is provided at the front end of the endoscope tube; the front end of the endoscope tube is inserted into and cooperates with the main channel, and the front end of the suction tube is connected to and communicates with the auxiliary channel;

[0021] A blocking portion is provided at the front end of the connector, the blocking portion is located in the main opening, and the blocking portion is between the main channel and the secondary channel;

[0022] A lens is provided at the front end of the endoscope tube, and the end edge of the main opening is within the field of view of the lens.

[0023] The technical solution provided by the present invention has the following advantages and effects:

[0024] The connecting body of the auxiliary connecting piece described in the present invention is provided with a main opening, a main channel and a secondary channel. The path of the sucked liquid entering the secondary channel through the main opening is shortened and the channel is straight, so that the liquid or blood in the gastrointestinal cavity can be sucked out, thereby improving the suction effect and making the field of view at the front end of the endoscope tube clearer; on the other hand, the main opening is opposite to at least part of the area of the main channel and the secondary channel respectively, the opening area of the main opening is larger, and at least part of the area directly in front of the secondary channel is in an open state. When suction is performed through the secondary channel, the liquid passing through the front area of the main channel is minimized, and the liquid is reduced from blocking the line of sight of the lens in front of the main channel, making the field of view clearer. At the same time, the situation in front of the secondary channel can be better seen through the lens, further improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0026] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0027] Figure 1 is an external view of the flexible endoscope-assisted suction device in embodiment 1 of the present invention;

[0028] Figure 2 is a partial cross-sectional view of the flexible endoscope-assisted suction device in embodiment 1 of the present invention;

[0029] Figure 3 This is an exploded view of the flexible endoscope-assisted suction device in Example 1 of the present invention;

[0030] Figure 4 is an external view of the auxiliary connecting member in the first embodiment of the present invention;

[0031] Figure 5 is a cross-sectional view of the auxiliary connecting member in the long axis direction in the first embodiment of the present invention;

[0032] Figure 6 is a perspective view of the auxiliary connecting member in the short axis direction in the first embodiment of the present invention;

[0033] Figure 7is a top view of the auxiliary connecting member in embodiment 1 of the present invention;

[0034] Figure 8 is a three-dimensional diagram of the outer sleeve in embodiment 1 of the present invention;

[0035] Figure 9 This is an end view of the outer sleeve in embodiment 1 of the present invention;

[0036] Figure 10 Schematic diagram of the optical path of the flexible endoscope-assisted suction device in embodiment 1 of the present invention;

[0037] Figure 11 is an external view of the flexible endoscope-assisted suction device in the second embodiment of the present invention;

[0038] Figure 12 is a partial cross-sectional view of the flexible endoscope-assisted suction device in embodiment 2 of the present invention;

[0039] Figure 13 is an exploded view of the flexible endoscope-assisted suction device in the second embodiment of the present invention;

[0040] Figure 14 is an external view of the auxiliary connecting member in the second embodiment of the present invention;

[0041] Figure 15 is a cross-sectional view of the auxiliary connecting member in the long axis direction in the second embodiment of the present invention;

[0042] Figure 16 is a perspective view of the auxiliary connecting member in the short axis direction in the second embodiment of the present invention;

[0043] Figure 17 is a top view of the auxiliary connecting member in the second embodiment of the present invention;

[0044] Figure 18 is a side perspective view of the auxiliary connecting member in the second embodiment of the present invention;

[0045] Figure 19 Schematic diagram of the optical path of the flexible endoscope-assisted suction device in the second embodiment of the present invention;

[0046] Figure 20 is an external view of the auxiliary connecting member in the third embodiment of the present invention;

[0047] Figure 21 is a cross-sectional view of the auxiliary connecting member in the long axis direction in the third embodiment of the present invention;

[0048] Figure 22 is a top view of the auxiliary connecting member in embodiment 3 of the present invention;

[0049] Figure 23 is a side perspective view of the auxiliary connecting member in the fourth embodiment of the present invention;

[0050] Figure 24 is a side perspective view of the auxiliary connecting member in embodiment 5 of the present invention;

[0051] Description of reference numerals:

[0052] 10. Auxiliary connector, 11. Connector, 12. Main opening, 13. Main channel, 14. Secondary channel, 15. Blocking part, 16. Concave guide surface, 17. Spacer neck, 18. Curved outer wall,

[0053] 21. Endoscope tube, 211. Lens, 22. Suction tube, 221. Flow control part, 222. Connector,

[0054] 30. Outer sleeve, 31. Main body, 311. First channel, 32. Longitudinal side wall, 321. Second channel. DETAILED DESCRIPTION

[0055] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0056] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the context of the actual scenarios of the technical solutions of the present invention, all technical and scientific terms used herein may also have the meanings corresponding to the purpose of implementing the technical solutions of the present invention.

[0057] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0058] Unless stated otherwise or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element. When an element is considered to be "located on" another element, it can be directly located on the other element or there can be an intermediate element.

[0060] Unless otherwise specified or defined, the “said” and “the” used in this document refer to the technical features or technical contents mentioned or described before the corresponding position, and the technical features or technical contents may be the same as or similar to the technical features or technical contents mentioned therein.

[0061] There is no doubt that technical contents or technical features that are contrary to the purpose of the present invention or are obviously contradictory should be excluded.

[0062] Example 1

[0063] like Figures 1 to 10 As shown, the flexible endoscope-assisted suction device includes an endoscope tube 21, a suction tube 22 and an auxiliary connecting piece 10, wherein the auxiliary connecting piece 10 is a key innovative component of this embodiment.

[0064] The auxiliary connecting member 10 includes a connecting body 11, the rear end of which has a main channel 13 and a secondary channel 14. The secondary channel 14 is smaller than the main channel 13 and is located next to the main channel 13. A main opening 12 is provided at the front end of the connecting body 11. The main opening 12 is communicated with both the main channel 13 and the secondary channel 14. In the longitudinal projection direction, the main opening 12 is opposite to the main channel 13 and the secondary channel 14 respectively.

[0065] The connector 11 of the auxiliary connector 10 of the present invention is provided with a main opening 12, a main channel 13 and a secondary channel 14. Liquid or blood in the gastrointestinal cavity can be sucked out through the secondary channel 14, thereby improving the suction effect and making the field of view at the front end of the endoscope tube 21 clearer. On the other hand, the main opening 12 is opposite to the main channel 13 and the secondary channel 14 respectively. The opening area of the main opening 12 is larger, and the front of the secondary channel 14 is in an open state, with a larger space. When suction is performed through the secondary channel 14, the liquid passing through the front area of the main channel 13 is minimized. For viscous liquids or lumpy substances, suction and emptying can be performed more quickly, reducing the liquid's obstruction of the line of sight of the lens 211 in front of the main channel 13, making the field of view clearer. At the same time, the situation in front of the secondary channel 14 can be better seen through the lens 211, further improving the safety of the operation.

[0066] The inner wall of the front end of the connector 11 is cylindrical, forming the main opening 12, and the inner wall of the rear end of the connector 11 is cylindrical, forming the main channel 13 and the auxiliary channel 14 respectively; the outer wall of the connector 11 is cylindrical, preferably cylindrical or elliptical. In this embodiment, the outer wall of the connector 11 is elliptical, and the main opening 12 is formed in the shape of an elliptical hole. A spacer neck 17 is provided between the main channel 13 and the inner wall of the main opening 12. The diameter of the spacer neck 17 is smaller than the diameter of the main channel 13. The spacer neck 17 can limit the forward movement of the front end of the endoscope tube 21 and play a role in resisting the endoscope tube 21. The outer wall of the connector 11, the main opening 12, the main channel 13, and the auxiliary channel 14 all adopt a cylindrical structure, which facilitates the mold removal during injection molding and reduces the processing cost.

[0067] Please focus on Figure 1 、 Figure 2 and Figure 3 The front end of the endoscope tube 21 is inserted into the main channel 13 and cooperates with the main channel 13 , and the front end of the suction tube 22 is inserted into the secondary channel 14 and connected to the secondary channel 14 .

[0068] Please focus on combining Figure 8 and Figure 9 The flexible endoscope-assisted suction device also includes an outer sleeve 30. The outer sleeve 30 includes a main body 31, a first channel 311 formed within the main body 31, a longitudinal sidewall 32 attached to one side of the outer wall of the main body 31, and a second channel 321 formed between the longitudinal sidewall 32 and the outer wall of the main body 31. The endoscope tube 21 is inserted into the first channel 311 and engages with the inner wall of the first channel 311. The suction tube 22 is inserted into the second channel 321 and engages with the inner wall of the second channel 321, so that the outer sleeve 30 simultaneously wraps the endoscope tube 21 and the suction tube 22. After the outer sleeve 30 is installed, the suction tube 22 can better adhere to the endoscope tube 21 and better conform to the curvature of the endoscope tube 21. The suction tube 22 itself is not easily bent or looped, making it more convenient to use.

[0069] After adopting the outer sleeve 30, the endoscope tube 21 and the suction tube 22 can be installed more tightly on the rear part of the auxiliary connecting part 10, reducing the displacement between the two and improving the safety of the operation. After installing the outer sleeve 30, the damage to human tissue caused by the external sharp corners of the auxiliary connecting part 10 is also reduced.

[0070] Please focus on combining Figure 10A lens 211 is provided at the front end of the endoscope tube 21. To ensure an effective field of view for the lens 211, and in particular to minimize damage to the gastrointestinal mucosa caused by the front end of the auxiliary connector 10 located on the side of the secondary channel 14, it is necessary to ensure that the lens 211 can at least see the front end of the auxiliary connector 10 located on the side of the secondary channel 14. Therefore, in this embodiment, the angle β between the line connecting the end edge of the main opening 12 and the lens 211, relative to the axis of the endoscope tube 21, is less than or equal to 70 degrees. Since the angle α of the field of view of the lens 211 of a commonly used endoscope tube 21 is 140 degrees, this ensures that the end edge of the main opening 12 is within the field of view of the lens 211. The angle β between the line connecting the end edge of the main opening 12 and the lens 211, relative to the axis of the endoscope tube 21, is less than or equal to 70 degrees. It should be noted that the field of view angle α of the lens 211 varies between different models of endoscope tubes 21. In order to ensure that the lens 211 can see the front end of the auxiliary connecting piece 10 located on the side of the secondary channel 14, the vertical distance H between the end edge of the main opening 12 of the auxiliary connecting piece 10 and the plane where the lens 211 of the endoscope tube 21 is located is calculated according to the size of the angle β. The vertical distance H is the length of the front part of the auxiliary connecting piece 10 on the side of the main opening 12, which provides the size parameters for manufacturing the auxiliary connecting piece 10.

[0071] Please focus on combining Figure 4 and Figure 7 Two concave guide surfaces 16 are provided on either side of the front end of the secondary channel 14. These concave guide surfaces 16 are located on either side of the line connecting the centers of the primary channel 13 and the secondary channel 14. The outer sides of the concave guide surfaces 16 are higher than the inner sides, and the outer sides of the concave guide surfaces 16 are biased toward the primary channel 13. The two concave guide surfaces 16 can better guide liquid to the secondary channel 14 and quickly draw it away, improving the liquid suction effect. At the same time, due to the structural design of the auxiliary connector 10, dead angles are formed on both sides of the area between the primary channel 13 and the secondary channel 14, which can easily lead to the accumulation of liquid or viscous objects. The outer sides of the concave guide surfaces 16 are slightly biased toward the main channel 13, effectively solving this problem.

[0072] A flow control member 221 is provided on the suction pipe 22 for controlling the magnitude of the negative pressure, thereby controlling the magnitude of the suction force at the secondary channel 14 . A connector 222 is provided at the rear end of the suction pipe 22 for connecting to a negative pressure device.

[0073] Example 2

[0074] like Figures 11 to 19As shown, in this embodiment, a blocking portion 15 is provided at the front end of the connector 11 . The blocking portion 15 is located in the main opening 12 and between the main channel 13 and the secondary channel 14 .

[0075] In this embodiment, the blocking portion 15 is a flange that protrudes toward the front end relative to the primary channel 13 and the secondary channel 14 and is lower than the end edge of the primary opening 12. The blocking portion 15 is arc-shaped, with the concave portion of the arc-shaped blocking portion 15 facing the primary channel 13.

[0076] After the barrier 15 is provided, under the action of negative pressure, the liquid entering through the main opening 12 will flow toward the secondary channel 14 , preventing it from accumulating on the main channel 13 and affecting the field of view of the lens 211 .

[0077] Furthermore, the angle between the end edge of the main opening 12 and the lens 211 relative to the axis of the endoscope tube 21 is less than or equal to 70 degrees; and the angle between the end edge of the blocking portion 15 and the lens 211 relative to the axis of the endoscope tube 21 is greater than or equal to 70 degrees. This ensures that the lens 211 can see the end edge of the main opening 12 on the side of the secondary channel 14, while also ensuring that the blocking portion 15 does not block the view there.

[0078] It should be pointed out that the viewing angle α of the lens 211 of different models of endoscope tubes 21 is different. In order to ensure that the lens 211 can see the front end of the auxiliary connector 10 located on the side of the secondary channel 14, the vertical distance H between the end edge of the main opening 12 of the auxiliary connector 10 and the plane where the lens 211 of the endoscope tube 21 is located is calculated according to the size of the angle β. The vertical distance H is the length of the front part of the auxiliary connector 10 on the side of the main opening 12. This provides dimensional parameters for making the auxiliary connector 10. At the same time, according to the size of the angle β, the height h of the blocking portion 15 can be calculated to ensure that the blocking portion 15 does not block the line of sight at this location.

[0079] Example 3

[0080] like Figures 20 to 22 As shown, in this embodiment, no guide concave surface is provided on the side of the front end of the secondary channel 14. The structure of the auxiliary connecting member 10 in this embodiment is relatively simple, and its principle can be referred to in the first embodiment, which will not be described in detail in this embodiment.

[0081] It is understood that the outer wall of the connector 11 is not limited to a columnar shape, and may also have a slight taper or an arc shape, as shown in the following two embodiments.

[0082] Example 4

[0083] like Figure 23 As shown, in this embodiment, compared with the first embodiment, the front end outer wall of the connector 11 has a slight arc to form an arc-shaped outer wall 18. This structure can facilitate the forward movement of the auxiliary connector 10, and the smoother front end structure can reduce damage to the gastrointestinal mucosa.

[0084] Example 5

[0085] like Figure 24 As shown, in this embodiment, compared to the first embodiment, the outer wall of the connector 11 has a slight arc, forming a curved outer wall 18. This structure facilitates the forward movement of the auxiliary connector 10, and the smoother front end structure reduces damage to the gastrointestinal mucosa. Furthermore, a barrier 15 is provided at the front end of the connector 11. This barrier 15 is located within the main opening 12 and between the main channel 13 and the secondary channel 14. This principle is described in the previous embodiment and will not be repeated here.

[0086] The purpose of the above embodiments is to exemplify and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of the present invention, and it does not limit the scope of protection of the present invention.

[0087] The above embodiments are not exhaustive and may include many other embodiments not listed above. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. Auxiliary connecting piece, characterized in that, The connector comprises a connector having a main channel and a secondary channel at the rear end thereof, wherein the secondary channel is smaller than the main channel and is located beside the main channel; a main opening is provided at the front end of the connector, the main opening being in communication with both the main channel and the secondary channel; in the longitudinal projection direction, the main opening is opposite to at least part of the main channel and the secondary channel, respectively; A blocking portion is provided at the front end of the connector, the blocking portion is located in the main opening, and the blocking portion is between the main channel and the secondary channel; a lens is provided at the front end of the endoscope tube, the front end of the endoscope tube is inserted into the main channel and cooperates with the main channel; The end edge of the main opening is within the field of view of the lens of the endoscope tube; The line connecting the end edge of the main opening and the lens forms a first angle relative to the axis of the endoscope tube; and the line connecting the end edge of the blocking portion and the lens forms a second angle relative to the axis of the endoscope tube; the first angle is less than or equal to half of the field of view of the lens, and the second angle is greater than or equal to half of the field of view of the lens.

2. The auxiliary connecting piece according to claim 1, characterized in that: The outer wall of the connector is columnar.

3. The auxiliary connecting piece according to claim 2, characterized in that: The outer wall of the connector is cylindrical or elliptical.

4. The auxiliary connecting piece according to claim 1, characterized in that: The outer wall of the connector is in an arc shape or a frustum shape.

5. The auxiliary connecting piece according to claim 1, characterized in that: The blocking portion is a flange, which protrudes toward the front end relative to the main channel and the secondary channel and is lower than the end edge of the main opening.

6. The auxiliary connecting piece according to claim 5, characterized in that: The blocking portion is arc-shaped, and the concave portion of the arc-shaped blocking portion faces one side of the main channel.

7. The auxiliary connecting piece according to any one of claims 1 to 4, characterized in that: A flow-guiding concave surface is provided on the side of the front end of the secondary channel.

8. The auxiliary connecting piece according to claim 7, characterized in that: There are two flow-guiding concave surfaces, and the two flow-guiding concave surfaces are respectively located on both sides of the center line connecting the main channel and the secondary channel.

9. The auxiliary connecting piece according to any one of claims 1 to 4, characterized in that: A spacing neck is provided between the main channel and the inner wall of the main opening, and a diameter of the spacing neck is smaller than a diameter of the main channel.

10. The auxiliary connecting piece according to any one of claims 1 to 4, characterized in that: It also includes an outer sleeve, which is located at the rear end of the connector, and the hollow portion inside the outer sleeve is communicated with the main channel and the secondary channel.

11. A flexible endoscope-assisted suction device, characterized in that: It comprises an endoscope tube, a suction tube and any auxiliary connecting piece as claimed in any of the preceding claims, wherein the front end of the endoscope tube is inserted into the main channel and matched with the main channel, and the front end of the suction tube is connected to and communicated with the secondary channel.

12. The flexible endoscope-assisted suction device according to claim 11, characterized in that: It also includes an outer sleeve, which is located at the rear end of the connector. The outer sleeve includes a main body, a first channel is formed in the main body, a longitudinal side wall is attached to one side of the outer wall of the main body, and a second channel is formed between the longitudinal side wall and the outer wall of the main body; the endoscope tube is inserted into the first channel and cooperates with the inner wall of the first channel, and the suction straw is inserted into the second channel and cooperates with the inner wall of the second channel.

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